:root {
    --ui-font: "Inter", "SF Pro Text", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
    --display-font: "Inter", "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
    --page-bg: #f7f8fb;
    --panel-bg: #ffffff;
    --ink: #172033;
    --ink-soft: #5c667a;
    --muted: #8a94a8;
    --line: #e7ebf2;
    --line-strong: #d8deea;
    --accent: #ff5a00;
    --accent-soft: #fff0e4;
    --success: #e85d04;
    --warning: #b45309;
    --shadow: 0 12px 28px rgba(29, 41, 57, 0.08);
    --radius: 8px;
    --carousel-copy-font: var(--display-font);
    --carousel-heading-font: var(--display-font);
    --card-title-font: var(--display-font);
    --card-sub-font: var(--ui-font);
}

* {
    box-sizing: border-box;
}

html {
    color-scheme: light;
    scrollbar-width: none;
    scroll-behavior: auto;
}

body {
    margin: 0;
    min-height: 100vh;
    overflow-x: hidden;
    -ms-overflow-style: none;
    background:
        linear-gradient(180deg, #ffffff 0, rgba(255, 255, 255, 0) 320px),
        var(--page-bg);
    color: var(--ink);
    font-family: var(--ui-font);
    font-size: 16px;
    letter-spacing: 0;
}

html::-webkit-scrollbar,
body::-webkit-scrollbar {
    width: 0;
    height: 0;
    display: none;
}

[hidden] {
    display: none !important;
}

button,
input {
    font: inherit;
}

a {
    color: inherit;
    text-decoration: none;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.site-shell {
    min-height: 100vh;
    width: 100%;
    overflow-x: hidden;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: clamp(18px, 3vw, 32px);
    min-height: 66px;
    padding: 0 clamp(20px, 4vw, 56px);
    background: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid rgba(224, 229, 238, 0.82);
    backdrop-filter: blur(18px);
    box-shadow: 0 1px 14px rgba(15, 23, 42, 0.035);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    min-width: 0;
    min-height: 42px;
    padding: 4px 16px 4px 5px;
    border-radius: 999px;
    background: linear-gradient(90deg, #050505 0%, #15100d 48%, #6f3215 100%);
    color: #ffffff;
    box-shadow: 0 10px 22px rgba(22, 15, 12, 0.16);
    overflow: hidden;
}

.brand-mark-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 999px;
    background: #000000;
    overflow: hidden;
    flex: 0 0 auto;
}

.brand-mark {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    transform: scale(1.5);
    transform-origin: center;
    filter: drop-shadow(0 6px 12px rgba(255, 90, 0, 0.18));
}

.brand-name {
    font-size: 20px;
    font-weight: 800;
    line-height: 1;
    letter-spacing: 0;
    white-space: nowrap;
    color: #ffffff;
}

.brand-name-grad {
    color: #ffffff;
}

.brand-name span:not(.brand-name-grad),
.brand-name {
    color: #ff7a1a;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 3px;
    min-width: 0;
}

.main-nav a,
.main-nav button {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 14px;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: #4d586b;
    font: inherit;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0;
    line-height: 1;
    cursor: pointer;
}

.main-nav a[aria-current="page"],
.main-nav button[aria-current="page"],
.main-nav a:hover,
.main-nav button:hover,
.main-nav button[aria-expanded="true"] {
    background: rgba(255, 90, 0, 0.08);
    color: var(--accent);
}

.course-mega-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 18;
    max-height: 100vh;
    overflow-y: auto;
    padding: calc(var(--topbar-offset, 66px) + 30px) clamp(22px, 8vw, 220px) 36px;
    border-bottom: 1px solid rgba(214, 220, 232, 0.9);
    background: #f6f7fa;
    box-shadow: 0 24px 70px rgba(15, 23, 42, 0.14);
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 260ms ease, transform 320ms cubic-bezier(.2, .8, .2, 1);
}

.course-mega-menu[hidden] {
    display: block !important;
    visibility: hidden;
}

.course-mega-menu.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    visibility: visible;
}

.course-mega-inner {
    display: grid;
    grid-template-columns: minmax(210px, 360px) minmax(0, 1fr);
    gap: clamp(34px, 6vw, 88px);
    width: min(1480px, 100%);
    margin: 0 auto;
}

.mega-column-feature span,
.mega-topic-group span {
    display: block;
    margin-bottom: 18px;
    color: #6f7684;
    font-size: 15px;
    font-weight: 500;
}

.mega-all-modules {
    display: block;
    border: 0;
    padding: 0;
    background: transparent;
    color: #242832;
    font-size: clamp(28px, 3vw, 42px);
    line-height: 1.2;
    font-weight: 760;
    letter-spacing: 0;
    text-align: left;
    cursor: pointer;
}

.mega-topic-groups {
    display: grid;
    grid-template-columns: repeat(3, minmax(150px, 1fr));
    gap: 34px clamp(30px, 5vw, 70px);
}

.mega-topic-group {
    min-width: 0;
}

.mega-topic-group ul {
    display: grid;
    gap: 11px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.mega-topic-group button {
    border: 0;
    padding: 0;
    background: transparent;
    color: #242832;
    font-size: 17px;
    line-height: 1.25;
    font-weight: 650;
    text-align: left;
    cursor: pointer;
}

.mega-topic-group small {
    margin-left: 7px;
    color: #8a94a8;
    font-size: 13px;
    font-weight: 650;
}

.mega-topic-group button:hover,
.mega-all-modules:hover,
.mega-topic-group button:focus-visible,
.mega-all-modules:focus-visible {
    color: var(--accent);
    outline: 0;
}

.top-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    min-width: 0;
    margin-left: auto;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    width: min(26vw, 330px);
    min-width: 220px;
    height: 42px;
    padding: 0 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #f8faff;
}

.search-box svg {
    width: 18px;
    height: 18px;
    fill: var(--muted);
    flex: 0 0 auto;
}

.search-box input {
    width: 100%;
    min-width: 0;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--ink);
}

.search-box input::placeholder {
    color: var(--muted);
}

.signin-button,
.signup-button {
    height: 40px;
    padding: 0 18px;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    background: #ffffff;
    color: var(--ink);
    font-size: 14px;
    font-weight: 750;
    letter-spacing: 0;
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.auth-user-chip {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    height: 40px;
    max-width: 220px;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    padding: 0 13px 0 6px;
    background: #ffffff;
    color: var(--ink);
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.auth-account-menu-wrap {
    position: relative;
    display: inline-flex;
}

.auth-user-chip span {
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: 999px;
    background: #151c2b;
    color: #ffffff;
    font-size: 12px;
    font-weight: 850;
}

.auth-user-chip strong {
    min-width: 0;
    overflow: hidden;
    font-size: 14px;
    font-weight: 780;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.auth-user-chip svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
    opacity: 0.72;
}

.auth-user-chip:hover,
.auth-user-chip:focus-visible {
    border-color: var(--accent);
    outline: 0;
    box-shadow: 0 6px 16px rgba(255, 90, 0, 0.12);
}

.auth-user-chip[aria-expanded="true"] {
    border-color: var(--accent);
    box-shadow: 0 8px 22px rgba(255, 90, 0, 0.12);
}

.auth-account-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    z-index: 80;
    width: 282px;
    overflow: hidden;
    border: 1px solid var(--line-strong);
    border-radius: 8px;
    background: #ffffff;
    color: var(--ink);
    box-shadow: 0 22px 48px rgba(15, 23, 42, 0.16);
}

.auth-account-summary {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--line);
}

.auth-account-summary > span {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: 999px;
    background: #151c2b;
    color: #ffffff;
    font-size: 18px;
    font-weight: 850;
}

.auth-account-summary strong {
    display: block;
    overflow: hidden;
    color: #172033;
    font-size: 15px;
    line-height: 1.2;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.auth-account-summary small {
    display: block;
    overflow: hidden;
    margin-top: 4px;
    color: #5c667a;
    font-size: 13px;
    line-height: 1.25;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.auth-account-menu button {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    width: 100%;
    min-height: 46px;
    border: 0;
    border-bottom: 1px solid var(--line);
    padding: 0 16px;
    background: #ffffff;
    color: #374151;
    font: inherit;
    font-size: 14px;
    font-weight: 650;
    text-align: left;
    cursor: pointer;
}

.auth-account-menu button:last-child {
    border-bottom: 0;
}

.auth-account-menu button:hover,
.auth-account-menu button:focus-visible {
    background: #fff7ed;
    color: var(--accent);
    outline: 0;
}

.auth-account-menu button small {
    color: #8a94a8;
    font-size: 12px;
    font-weight: 700;
}

.signup-button {
    border-color: #151c2b;
    background: #151c2b;
    color: #ffffff;
}

.signin-button:hover,
.signup-button:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 6px 16px rgba(255, 90, 0, 0.12);
}

.signup-button:hover {
    background: #ffffff;
}

.hero-section {
    display: grid;
    grid-template-columns: minmax(0, 0.96fr) minmax(0, 1.04fr);
    align-items: center;
    gap: clamp(20px, 2.4vw, 42px);
    width: min(1900px, calc(100% - 80px));
    min-height: 430px;
    margin: 0 auto;
    padding: 58px 0 52px;
}

.hero-copy {
    position: relative;
    z-index: 2;
    min-width: 0;
    max-width: 100%;
    margin-left: 15px;
}

.hero-copy .eyebrow {
    display: inline-block;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 3px solid var(--accent);
    color: #d94d00;
    font-size: 13px;
    letter-spacing: 0.04em;
    text-transform: none;
}

.hero-title {
    display: inline-block;
    max-width: 100%;
    margin: 0;
    background: linear-gradient(90deg, #172033 0%, #20283d 38%, #f05a00 56%, #ff5a00 78%, #b83b00 100%);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    font-family: var(--display-font);
    font-size: clamp(68px, 7vw, 116px);
    line-height: 0.92;
    font-weight: 900;
    letter-spacing: 0;
    white-space: normal;
    overflow: visible;
}

.hero-heading {
    max-width: min(760px, 100%);
    margin: 20px 0 0;
    color: #172033;
    font-family: var(--display-font);
    font-size: clamp(30px, 3.1vw, 50px);
    line-height: 1.08;
    font-weight: 780;
    letter-spacing: 0;
}

.hero-subheading {
    max-width: min(720px, 100%);
    margin: 24px 0 0;
    padding-left: 18px;
    border-left: 4px solid var(--accent);
    color: #33405a;
    font-size: clamp(19px, 1.55vw, 24px);
    line-height: 1.42;
    overflow-wrap: break-word;
    text-wrap: balance;
}

.hero-subheading strong {
    color: #172033;
    font-size: clamp(23px, 2vw, 31px);
    line-height: 1.15;
    font-weight: 820;
}

.hero-subheading span {
    max-width: 660px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 28px;
}

.primary-action,
.secondary-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 18px;
    border-radius: 8px;
    font-weight: 750;
}

.primary-action {
    background: var(--accent);
    color: #ffffff;
    box-shadow: 0 10px 22px rgba(255, 90, 0, 0.28);
}

.secondary-action {
    border: 1px solid rgba(255, 90, 0, 0.48);
    background: #ffffff;
    color: var(--accent);
}

.hero-visual {
    position: relative;
    z-index: 1;
    justify-self: end;
    min-width: 0;
    width: 100%;
}

.hero-carousel-card-shell {
    width: 100%;
    max-width: min(860px, 100%);
    margin-left: auto;
}

.hero-carousel-card {
    position: relative;
    width: 100%;
    aspect-ratio: 1862 / 845;
    min-height: 0;
    border: 0;
    border-radius: 8px;
    background: transparent;
    box-shadow: none;
    overflow: hidden;
    cursor: pointer;
    isolation: isolate;
}

.hero-carousel-card--hardcoded {
    cursor: default;
    pointer-events: none;
}

.hero-carousel-card:focus-visible {
    outline: 3px solid rgba(255, 90, 0, 0.28);
    outline-offset: 4px;
}

.hero-card-media {
    position: absolute;
    inset: 0;
    background: transparent;
}

.hero-card-media > img,
.hero-card-media > iframe,
.hero-card-media .carousel-html-frame,
.hero-card-media .carousel-html-media {
    width: 100%;
    height: 100%;
    border: 0;
    object-fit: contain;
    object-position: center center;
    transform: none !important;
}

.hero-card-media .carousel-html-media {
    position: absolute;
    inset: 0;
}

.hero-carousel-card[data-content-type="image"] {
    aspect-ratio: 1862 / 845 !important;
    height: auto !important;
    min-height: 0 !important;
}

.hero-carousel-card[data-content-type="image"] .carousel-card-image,
.demo-feature-card[data-content-type="image"] .carousel-card-image,
.compact-demo-card[data-content-type="image"] img {
    width: 100% !important;
    height: 100% !important;
    object-fit: contain !important;
    object-position: center center !important;
    transform: none !important;
}

.hero-card-meta {
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 18px;
    z-index: 2;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
    padding: 18px;
    border-radius: 8px;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0), rgba(15, 23, 42, 0.72));
    color: #ffffff;
    pointer-events: none;
}

.hero-card-meta h3 {
    margin: 0;
    color: var(--card-title-color, #ffffff);
    font-family: var(--card-title-font);
    font-size: clamp(18px, 1.8vw, 26px);
    line-height: 1.08;
}

.hero-card-meta span {
    display: block;
    margin-top: 4px;
    color: var(--card-sub-color, #dbe3f1);
    font-family: var(--card-sub-font);
    font-size: var(--card-sub-size, 13px);
    font-weight: 700;
}

.hero-carousel-card[data-text-position="hidden"] .hero-card-meta {
    display: none;
}

.lab-window {
    width: 100%;
    max-width: 560px;
    margin-left: auto;
    border: 1px solid rgba(118, 131, 156, 0.18);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 36px 82px rgba(29, 41, 57, 0.19);
    overflow: hidden;
}

.window-bar {
    display: flex;
    align-items: center;
    gap: 7px;
    height: 32px;
    padding: 0 12px;
    background: #f3f6fb;
    border-bottom: 1px solid var(--line);
}

.window-bar span {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: #f16b5f;
}

.window-bar span:nth-child(2) {
    background: #f4b64a;
}

.window-bar span:nth-child(3) {
    background: #20a67a;
}

.lab-screen {
    position: relative;
    aspect-ratio: 16 / 9;
    min-height: 260px;
    overflow: hidden;
    background: linear-gradient(135deg, #79b4d7, #d9eef8);
}

.desktop-strip {
    position: absolute;
    top: 16px;
    left: 16px;
    display: grid;
    gap: 10px;
}

.desktop-strip span {
    width: 18px;
    height: 18px;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.75);
    box-shadow: 0 4px 10px rgba(29, 41, 57, 0.18);
}

.editor-panel {
    position: absolute;
    left: 80px;
    top: 48px;
    width: 54%;
    height: 58%;
    padding: 28px 26px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: #191d20;
    color: #e7ebf2;
    box-shadow: 0 18px 34px rgba(23, 32, 51, 0.2);
}

.editor-title {
    color: rgba(255, 255, 255, 0.84);
    font-size: 18px;
    font-weight: 650;
}

.editor-lines {
    display: grid;
    gap: 10px;
    margin-top: 24px;
}

.editor-lines span {
    height: 7px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.16);
}

.editor-lines span:nth-child(1) {
    width: 72%;
}

.editor-lines span:nth-child(2) {
    width: 52%;
}

.editor-lines span:nth-child(3) {
    width: 64%;
    background: rgba(255, 90, 0, 0.56);
}

.editor-lines span:nth-child(4) {
    width: 42%;
}

.terminal-panel {
    position: absolute;
    left: 42%;
    bottom: 42px;
    width: 34%;
    min-width: 190px;
    padding: 14px;
    border: 2px solid #0d1523;
    background: #02060d;
    color: #7df0b0;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    font-size: 12px;
    line-height: 1.6;
    box-shadow: 0 18px 32px rgba(2, 6, 13, 0.24);
}



.terminal-panel span,
.terminal-panel strong {
    display: block;
    white-space: nowrap;
}

.terminal-panel strong {
    font-weight: 600;
}

.guide-panel {
    position: absolute;
    right: 18px;
    top: 48px;
    width: 22%;
    min-width: 145px;
    display: grid;
    gap: 10px;
    padding: 14px;
    border: 1px solid rgba(255, 90, 0, 0.22);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 18px 32px rgba(29, 41, 57, 0.13);
}

.guide-panel b {
    font-size: 14px;
}

.guide-panel span {
    color: var(--ink-soft);
    font-size: 12px;
    line-height: 1.35;
}

.guide-panel button {
    height: 28px;
    border: 0;
    border-radius: 6px;
    background: var(--accent);
    color: #ffffff;
    font-size: 12px;
    font-weight: 750;
}

.catalog-shell {
    display: grid;
    grid-template-columns: 278px minmax(0, 1fr);
    gap: 34px;
    width: min(1480px, calc(100% - 48px));
    margin: 50px auto 0;
    padding: 28px 0 44px;
}

.topics-panel {
    position: sticky;
    top: 100px;
    align-self: start;
    max-height: calc(100vh - 126px);
    overflow: auto;
    padding-right: 12px;
    border-right: 1px solid var(--line);
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 90, 0, 0.36) transparent;
    scrollbar-gutter: stable;
}

.topics-panel::-webkit-scrollbar {
    width: 7px;
}

.topics-panel::-webkit-scrollbar-track {
    background: transparent;
}

.topics-panel::-webkit-scrollbar-thumb {
    border: 2px solid transparent;
    border-radius: 999px;
    background: rgba(255, 90, 0, 0.34);
    background-clip: content-box;
}

.topics-panel::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 90, 0, 0.52);
    background-clip: content-box;
}

.topics-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0 13px;
    color: #657187;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: none;
}

.topics-header strong {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 22px;
    padding: 0 8px;
    border: 1px solid #e3e8f1;
    border-radius: 999px;
    background: #ffffff;
    color: #344054;
    font-size: 12px;
    font-weight: 750;
}

.topic-list {
    display: grid;
    gap: 4px;
}

.topic-button {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    min-height: 42px;
    padding: 0 12px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: #263348;
    text-align: left;
    cursor: pointer;
}

.topic-button span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.topic-button small {
    color: var(--muted);
}

.topic-button:hover {
    background: #f1f4f9;
}

.topic-button.is-active {
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 750;
}

.catalog-view {
    min-width: 0;
}

.catalog-head {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: center;
    padding: 0 0 20px;
    border-bottom: 1px solid var(--line);
}

.catalog-tools {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1 1 auto;
    justify-content: flex-end;
    min-width: 260px;
}

.search-box--catalog {
    flex: 1 1 auto;
    width: auto;
    min-width: 180px;
    max-width: 380px;
}

.pinned-button,
.open-tab-button,
.pin-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 38px;
    border: 1px solid #dfe5ef;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.94);
    color: #172033;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0;
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.pinned-button {
    flex: 0 0 auto;
    padding: 0 8px 0 12px;
}

.pinned-button svg {
    flex: 0 0 auto;
    width: 15px;
    height: 15px;
    stroke: var(--accent);
}

.pinned-button-label {
    line-height: 1;
}

.pin-chip,
.open-tab-button {
    padding: 0 13px;
}

.pinned-button [data-pinned-count] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    height: 22px;
    padding: 0 6px;
    border-radius: 999px;
    background: #172033;
    color: #ffffff;
    font-size: 11px;
    font-weight: 800;
    line-height: 1;
}

.pinned-button:hover,
.open-tab-button:hover,
.pin-chip:hover,
.pin-chip.is-pinned {
    border-color: rgba(249, 115, 22, 0.42);
    background: rgba(255, 242, 225, 0.92);
    color: #9a3c00;
    box-shadow: 0 8px 18px rgba(255, 90, 0, 0.1);
}

.pinned-button:hover [data-pinned-count] {
    background: #9a3c00;
}

.eyebrow {
    display: block;
    margin-bottom: 7px;
    color: #657187;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: none;
}

.catalog-title {
    margin: 0;
    font-size: clamp(31px, 4vw, 46px);
    line-height: 1.02;
    font-weight: 820;
    letter-spacing: 0;
}

.catalog-stats {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.catalog-stats span {
    display: inline-flex;
    align-items: center;
    min-height: 38px;
    padding: 0 13px;
    border: 1px solid #dfe5ef;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.88);
    color: #50596b;
    font-size: 13px;
    font-weight: 700;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.catalog-stats strong {
    margin-right: 5px;
    color: var(--ink);
    font-weight: 760;
}

.active-filter {
    margin-top: 18px;
    color: var(--ink-soft);
    font-size: 14px;
    font-weight: 650;
}



.course-detail-shell {
    width: min(1700px, calc(100% - 48px));
    margin: 26px auto 0;
    padding: 0 0 64px;
}

.course-breadcrumb {
    display: flex;
    align-items: center;
    gap: 14px;
    margin: 0 0 24px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 750;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.course-breadcrumb a,
.course-breadcrumb button {
    border: 0;
    padding: 0;
    background: transparent;
    color: inherit;
    font: inherit;
    cursor: pointer;
}

.course-breadcrumb a:hover,
.course-breadcrumb button:hover {
    color: var(--accent);
}

.course-breadcrumb strong {
    color: var(--ink);
    font-weight: 750;
}

.course-detail-layout {
    display: grid;
    grid-template-columns: minmax(320px, 520px) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
}

.course-overview-card,
.course-contents-card {
    border: 1px solid var(--line);
    border-radius: 16px;
    background: #ffffff;
    box-shadow: 0 2px 8px rgba(29, 41, 57, 0.035);
}

.course-overview-card {
    display: flex;
    flex-direction: column;
    min-height: 540px;
    padding: clamp(34px, 4vw, 48px);
}

.course-kicker {
    margin: 0 0 22px;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.4;
}

.course-kicker span {
    color: #5f6df6;
    font-weight: 700;
}

.course-overview-card h1 {
    max-width: 440px;
    margin: 0;
    color: var(--ink);
    font-size: clamp(42px, 3.8vw, 60px);
    line-height: 1.05;
    font-weight: 680;
    letter-spacing: 0;
}

.course-level-line {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 28px 0 0;
    color: var(--ink);
    font-size: 17px;
}

.level-bars {
    display: inline-flex;
    gap: 3px;
    align-items: end;
}

.level-bars i {
    display: block;
    width: 5px;
    background: #89a2f6;
    border-radius: 1px;
}

.level-bars i:nth-child(1) {
    height: 10px;
}

.level-bars i:nth-child(2) {
    height: 12px;
}

.level-bars i:nth-child(3) {
    height: 14px;
}

.course-description {
    max-width: 420px;
    margin: 28px 0 0;
    color: #4b5870;
    font-size: 18px;
    line-height: 1.55;
    font-weight: 400;
}

.course-detail-tags {
    align-items: flex-start;
    gap: 8px;
    margin: 24px 0 30px;
}

.start-learning-button {
    border: 1px solid #fb923c;
    border-radius: 8px;
    background: var(--accent);
    color: #ffffff;
    font-weight: 700;
    cursor: pointer;
}

.start-learning-button {
    width: 100%;
    height: 58px;
    margin-top: auto;
    font-size: 17px;
    flex-shrink: 0;
    box-shadow: 0 10px 18px rgba(249, 115, 22, 0.22);
}

.start-learning-button:hover {
    background: #ea580c;
}

.start-learning-button:disabled,
.start-learning-button.is-disabled {
    cursor: not-allowed;
    border-color: #cfd7e6;
    background: #d9e0ec;
    color: #68748a;
    box-shadow: none;
}

.course-contents-card {
    overflow: hidden;
}

.course-contents-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 20px;
    padding: 34px 32px;
    border-bottom: 1px solid var(--line);
}

.course-contents-actions {
    display: inline-flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    flex-wrap: wrap;
}

.course-contents-head h2 {
    margin: 0;
    color: var(--ink);
    font-size: 28px;
    line-height: 1.1;
    font-weight: 700;
}

.course-contents-head > span {
    color: var(--muted);
    font-size: 16px;
    font-weight: 650;
    white-space: nowrap;
}

.lesson-list {
    display: grid;
}

.detail-section {
    border-bottom: 1px solid var(--line);
}

.detail-section:last-child {
    border-bottom: 0;
}

.detail-section-toggle {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto 20px;
    align-items: center;
    gap: 18px;
    width: 100%;
    min-height: 96px;
    border: 0;
    padding: 0 32px;
    background: #ffffff;
    color: var(--ink);
    text-align: left;
    cursor: pointer;
}

.detail-section-toggle span:first-child {
    overflow: hidden;
    font-size: 20px;
    font-weight: 700;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.detail-section-toggle small {
    color: var(--muted);
    font-size: 15px;
    font-weight: 650;
    white-space: nowrap;
}

.detail-section-toggle:hover,
.detail-section-toggle:focus-visible {
    outline: 0;
    background: #f6f8fc;
}

.detail-section-chevron {
    color: var(--muted);
    font-size: 13px;
    transition: transform 150ms ease;
}

.detail-section-toggle[aria-expanded="true"] .detail-section-chevron {
    transform: rotate(180deg);
}

.lesson-row {
    display: grid;
    grid-template-columns: 36px minmax(0, 1fr) auto;
    align-items: center;
    gap: 18px;
    min-height: 76px;
    padding: 0 24px 0 62px;
    border-bottom: 1px solid var(--line);
    background: #fbfcfd;
    cursor: pointer;
    transition: background 150ms ease, box-shadow 150ms ease;
}

.lesson-row:last-child {
    border-bottom: 0;
}

.lesson-row:hover,
.lesson-row:focus-visible {
    background: #fff7ed;
    box-shadow: inset 4px 0 0 var(--accent);
    outline: 0;
}

.lesson-row h3 {
    min-width: 0;
    margin: 0;
    color: #26334a;
    font-size: 18px;
    line-height: 1.2;
    font-weight: 600;
    letter-spacing: 0;
}

.lesson-row-actions {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.lesson-row-actions .pin-chip,
.lesson-row-actions .open-tab-button {
    min-height: 36px;
    padding: 0 10px;
}

.lesson-icon {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border: 1px solid #d8e0ec;
    border-radius: 7px;
    background: #ffffff;
    color: #7a8698;
}

.lesson-icon svg {
    width: 15px;
    height: 15px;
    stroke: currentColor;
}

.lesson-icon.lab::before {
    position: absolute;
    inset: 2px 4px;
    content: "";
    border: 2px solid currentColor;
    border-radius: 3px;
    background:
        linear-gradient(135deg, transparent 0 50%, currentColor 50% 58%, transparent 58%) right top / 9px 9px no-repeat;
}

.lesson-icon.lab::after {
    position: absolute;
    right: 4px;
    top: 2px;
    width: 8px;
    height: 8px;
    content: "";
    border-left: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    background: #fbfcfd;
}

.lesson-icon.challenge::before {
    position: absolute;
    left: 2px;
    top: 4px;
    width: 20px;
    height: 14px;
    content: "";
    border: 2px solid currentColor;
    border-radius: 3px;
}

.lesson-icon.challenge::after {
    position: absolute;
    left: 9px;
    bottom: 1px;
    width: 8px;
    height: 2px;
    content: "";
    background: currentColor;
    box-shadow: 0 3px 0 2px #fbfcfd, 0 3px 0 3px currentColor;
}

.lesson-status {
    width: 28px;
    height: 28px;
    border: 2px solid #cbd5e1;
    border-radius: 50%;
    background: transparent;
}

.is-course-player {
    overflow: hidden;
    background: #ffffff;
}

.course-player-shell {
    width: 100%;
    min-height: 100vh;
    margin: 0;
    background: #ffffff;
    color: #172033;
}

.course-player-layout {
    display: grid;
    grid-template-columns: 335px minmax(0, 1fr);
    min-height: 100vh;
    background: #ffffff;
}

.player-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
    height: 100vh;
    min-height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior: contain;
    padding: 24px 16px;
    scrollbar-width: thin;
    scrollbar-color: rgba(249, 115, 22, 0.45) transparent;
    border-right: 1px solid #dbe5ef;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 247, 237, 0.98) 100%);
    color: #182238;
    box-shadow: inset -1px 0 0 rgba(23, 32, 51, 0.04);
}

.player-sidebar::-webkit-scrollbar {
    width: 8px;
}

.player-sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.player-sidebar::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: rgba(249, 115, 22, 0.45);
}

.player-course-title {
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    min-height: 42px;
    padding: 2px 4px 6px;
    color: #172033;
}

.player-course-title strong {
    overflow: hidden;
    font-size: 17px;
    line-height: 1.2;
    font-weight: 740;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.player-course-mark {
    position: relative;
    width: 30px;
    height: 30px;
}

.player-course-mark::before,
.player-course-mark::after {
    position: absolute;
    left: 4px;
    right: 4px;
    height: 9px;
    content: "";
    border-radius: 3px;
    background: var(--accent);
    transform: skewY(-20deg);
}

.player-course-mark::before {
    top: 6px;
    box-shadow: 0 9px 0 rgba(23, 32, 51, 0.64), 0 18px 0 rgba(249, 115, 22, 0.34);
}

.player-course-mark::after {
    top: 0;
    opacity: 0.18;
}

.player-search-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
    align-items: center;
}

.player-search {
    min-width: 0;
}

.player-search input {
    width: 100%;
    height: 44px;
    padding: 0 14px;
    border: 1px solid #d9e2ee;
    border-radius: 10px;
    background: #ffffff;
    color: #172033;
    outline: 0;
    box-shadow: 0 8px 22px rgba(23, 32, 51, 0.05);
}

.player-search input::placeholder {
    color: #64748b;
}

.player-search input:focus {
    border-color: rgba(249, 115, 22, 0.72);
    box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.14), 0 8px 22px rgba(23, 32, 51, 0.05);
}

.player-sections {
    display: grid;
    gap: 8px;
    margin-top: 4px;
}

.player-section {
    display: grid;
    gap: 4px;
}

.player-section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    width: 100%;
    min-height: 32px;
    border: 0;
    border-radius: 8px;
    padding: 6px 7px;
    background: transparent;
    color: #334155;
    font-size: 13px;
    font-weight: 560;
    line-height: 1.35;
    text-align: left;
    cursor: pointer;
    box-shadow: none;
}

.player-section-title:hover,
.player-section-title:focus-visible {
    outline: 0;
    background: #fff7ed;
}

.player-section-title[aria-expanded="true"] {
    background: #fff2e1;
    color: #8a3a08;
    font-weight: 620;
}

.player-section-chevron {
    flex: 0 0 auto;
    transition: transform 150ms ease;
}

.player-section-title[aria-expanded="true"] .player-section-chevron {
    transform: rotate(180deg);
}

.player-lesson-nav {
    display: grid;
    gap: 4px;
    overflow-y: auto;
    overflow-x: hidden;
    margin-left: 10px;
    padding: 2px 3px 2px 9px;
    border-left: 1px solid #f2d5b5;
}

.player-lesson-link {
    width: 100%;
    min-height: 32px;
    border: 1px solid transparent;
    border-radius: 8px;
    padding: 7px 8px;
    background: transparent;
    color: #475569;
    font-size: 13px;
    font-weight: 460;
    line-height: 1.35;
    text-align: left;
    cursor: pointer;
}

.player-lesson-link span {
    display: block;
    overflow: visible;
    text-overflow: clip;
    white-space: normal;
}

.player-lesson-link:hover,
.player-lesson-link:focus-visible,
.player-lesson-link.is-active {
    outline: 0;
    border-color: rgba(249, 115, 22, 0.24);
    background: #fffaf5;
    color: #7c2d12;
}

.player-lesson-link.is-active {
    border-color: rgba(249, 115, 22, 0.44);
    background: #ffedd5;
    color: #7c2d12;
    font-weight: 540;
    box-shadow: inset 3px 0 0 var(--accent);
}

.player-main {
    min-width: 0;
    min-height: 100vh;
    background: #ffffff;
}

.player-toolbar {
    display: grid;
    grid-template-columns: 170px minmax(0, 1fr) auto;
    align-items: center;
    gap: 16px;
    height: 72px;
    padding: 0 16px;
    border-bottom: 1px solid #e7ebf2;
    background: #ffffff;
    color: #172033;
}

.player-back-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: max-content;
    min-height: 42px;
    padding: 0 18px;
    border: 1px solid rgba(37, 99, 235, 0.28);
    border-radius: 999px;
    background: #eff6ff;
    color: #2563eb;
    font-size: 14px;
    font-weight: 820;
    box-shadow: 0 8px 18px rgba(37, 99, 235, 0.08);
}

.player-back-link:hover,
.player-back-link:focus-visible {
    border-color: rgba(37, 99, 235, 0.46);
    background: #dbeafe;
    color: #1d4ed8;
    outline: 0;
    text-decoration: none;
}

.player-toolbar h1 {
    min-width: 0;
    margin: 0;
    overflow: hidden;
    font-size: 17px;
    line-height: 1.2;
    font-weight: 780;
    color: #172033;
    text-align: center;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.player-toolbar-actions {
    display: inline-flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    min-width: 0;
}

.player-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: max-content;
    min-width: 132px;
    height: 44px;
    border: 1px solid #d9e2ee;
    border-radius: 999px;
    background: #ffffff;
    color: #172033;
    font-size: 14px;
    font-weight: 720;
    cursor: pointer;
}

.player-pill:hover,
.player-pill.is-active,
.player-pill.is-pinned {
    border-color: rgba(249, 115, 22, 0.42);
    background: #fff2e1;
    color: #8a3a08;
}

.auth-page-shell {
    width: min(1280px, calc(100% - 48px));
    min-height: calc(100vh - 220px);
    margin: 0 auto;
    padding: 56px 0 86px;
}

.auth-layout {
    display: grid;
    grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 460px);
    gap: clamp(28px, 5vw, 70px);
    align-items: start;
}

.auth-copy {
    padding-top: 18px;
}

.auth-copy h1 {
    max-width: 720px;
    margin: 0;
    color: #172033;
    font-size: clamp(42px, 5vw, 72px);
    line-height: 1.02;
    letter-spacing: 0;
}

.auth-copy p {
    max-width: 680px;
    margin: 18px 0 0;
    color: #475569;
    font-size: clamp(18px, 1.6vw, 23px);
    line-height: 1.55;
}

.auth-benefits {
    display: grid;
    gap: 12px;
    max-width: 680px;
    margin: 32px 0 0;
    padding: 0;
    list-style: none;
}

.auth-benefits li {
    padding: 16px 18px;
    border: 1px solid #eadfd4;
    border-radius: 8px;
    background: #ffffff;
    color: #263348;
    font-size: 16px;
    line-height: 1.45;
    box-shadow: 0 8px 22px rgba(23, 32, 51, 0.045);
}

.auth-panel {
    border: 1px solid #eadfd4;
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 22px 60px rgba(23, 32, 51, 0.08);
    overflow: hidden;
}

.auth-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding: 10px;
    background: #f8faff;
    border-bottom: 1px solid var(--line);
}

.auth-tab {
    height: 44px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: #536178;
    font-weight: 800;
    cursor: pointer;
}

.auth-tab.is-active {
    background: #101827;
    color: #ffffff;
}

.auth-form {
    display: grid;
    gap: 14px;
    padding: 26px;
}

.auth-form h2 {
    margin: 0;
    color: #172033;
    font-size: 28px;
    line-height: 1.1;
}

.auth-field {
    display: grid;
    gap: 7px;
}

.auth-field label {
    color: #536178;
    font-size: 13px;
    font-weight: 760;
}

.auth-field input {
    width: 100%;
    height: 46px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 0 12px;
    color: #172033;
    font: inherit;
    outline: 0;
}

.auth-field input:focus {
    border-color: rgba(249, 115, 22, 0.55);
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.12);
}

.auth-submit {
    height: 48px;
    border: 0;
    border-radius: 8px;
    background: var(--accent);
    color: #ffffff;
    font-weight: 820;
    cursor: pointer;
}

.auth-submit:disabled {
    opacity: 0.65;
    cursor: wait;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #8a94a8;
    font-size: 13px;
    font-weight: 720;
}

.auth-divider::before,
.auth-divider::after {
    content: "";
    flex: 1 1 auto;
    height: 1px;
    background: var(--line);
}

.auth-google {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    height: 48px;
    border: 1px solid var(--line-strong);
    border-radius: 8px;
    background: #ffffff;
    color: #172033;
    font-weight: 820;
    cursor: pointer;
}

.auth-google svg {
    width: 20px;
    height: 20px;
    flex: 0 0 auto;
}

.auth-google:hover,
.auth-google:focus-visible {
    border-color: rgba(37, 99, 235, 0.38);
    outline: 0;
    box-shadow: 0 8px 22px rgba(37, 99, 235, 0.1);
}

.auth-message {
    min-height: 20px;
    margin: 0;
    color: #536178;
    font-size: 14px;
    line-height: 1.4;
}

.auth-message.is-error {
    color: #b42318;
}

.pinned-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(220px, 1fr));
    gap: 16px;
    max-width: 1120px;
    margin: 0 auto;
}

.pinned-card {
    display: grid;
    grid-template-rows: 168px 1fr;
    min-height: 318px;
    padding: 0;
    gap: 0;
}

.pinned-card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: auto;
}

.player-pinned-button {
    min-height: 44px;
    padding: 0 10px;
}

.info-page-shell {
    width: min(1480px, calc(100% - 48px));
    margin: 0 auto;
}

.info-page-shell {
    min-height: calc(100vh - 240px);
    padding: 72px 0 88px;
}

.info-page-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
    gap: clamp(24px, 4vw, 56px);
    align-items: end;
    max-width: 1120px;
    margin: 0 auto 22px;
    padding: clamp(32px, 4vw, 56px);
    border: 1px solid #eadfd4;
    border-radius: 8px;
    background:
        linear-gradient(135deg, rgba(255, 247, 237, 0.9), rgba(255, 255, 255, 0.95) 54%),
        #ffffff;
    box-shadow: 0 20px 54px rgba(23, 32, 51, 0.07);
}

.section-copy {
    max-width: 820px;
}

.section-copy h1,
.section-copy h2 {
    margin: 0;
    color: #172033;
    font-size: clamp(32px, 4vw, 54px);
    line-height: 1.05;
    font-weight: 820;
}

.section-copy p {
    margin: 18px 0 0;
    color: #475569;
    font-size: clamp(17px, 1.45vw, 21px);
    line-height: 1.6;
}

.info-document,
.info-contact-card {
    border: 1px solid #eadfd4;
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 12px 32px rgba(23, 32, 51, 0.05);
}

.info-document {
    max-width: 1120px;
    margin: 0 auto;
    overflow: hidden;
}

.info-document-section {
    padding: clamp(24px, 3vw, 36px) clamp(24px, 3.8vw, 44px);
    border-top: 1px solid #edf0f5;
}

.info-document-section:first-child {
    border-top: 0;
}

.info-document-section h2 {
    margin: 0;
    color: #172033;
    font-size: clamp(22px, 2vw, 30px);
    line-height: 1.2;
}

.info-document-section p {
    max-width: 860px;
    margin: 14px 0 0;
    color: #536178;
    font-size: 17px;
    line-height: 1.68;
}

.info-contact-card {
    display: grid;
    gap: 8px;
    padding: 24px;
}

.info-contact-card span {
    color: #8a94a8;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.info-contact-card a {
    color: var(--accent);
    font-size: clamp(22px, 2.4vw, 34px);
    font-weight: 820;
    overflow-wrap: anywhere;
}

.about-profile-card {
    align-self: stretch;
    display: grid;
    grid-template-rows: minmax(260px, 1fr) auto;
    min-height: 420px;
    margin: 0;
    border: 1px solid #eadfd4;
    border-radius: 8px;
    overflow: hidden;
    background: #ffffff;
    box-shadow: 0 18px 42px rgba(23, 32, 51, 0.08);
}

.about-profile-card img {
    width: 100%;
    height: 100%;
    min-height: 260px;
    object-fit: cover;
    object-position: center;
    display: block;
}

.about-profile-card figcaption {
    display: grid;
    gap: 6px;
    padding: 18px;
    border-top: 1px solid var(--line);
}

.about-profile-card strong {
    color: #172033;
    font-size: 20px;
    line-height: 1.1;
}

.about-profile-card span {
    color: #536178;
    font-size: 14px;
    line-height: 1.45;
}

.about-profile-link {
    display: inline-flex;
    align-items: center;
    width: max-content;
    max-width: 100%;
    min-height: 34px;
    margin-top: 6px;
    padding: 0 12px;
    border: 1px solid #d8deea;
    border-radius: 999px;
    color: #172033;
    font-size: 14px;
    font-weight: 780;
    overflow-wrap: anywhere;
}

.about-profile-link:hover,
.about-profile-link:focus-visible {
    border-color: var(--accent);
    color: var(--accent);
    outline: 0;
}

.architecture-page {
    display: grid;
    gap: clamp(28px, 4vw, 48px);
    width: min(1320px, 100%);
    margin: 0 auto;
}

.architecture-section-tabs {
    position: sticky;
    top: calc(var(--topbar-offset, 66px) + 10px);
    z-index: 8;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 16px 38px rgba(23, 32, 51, 0.08);
    backdrop-filter: blur(16px);
    overflow-x: auto;
    scrollbar-width: none;
}

.architecture-section-tabs::-webkit-scrollbar {
    display: none;
}

.architecture-section-tabs button {
    flex: 0 0 auto;
    min-height: 40px;
    padding: 0 16px;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    background: #ffffff;
    color: #4d586b;
    font: inherit;
    font-size: 14px;
    font-weight: 800;
    cursor: pointer;
}

.architecture-section-tabs button:hover,
.architecture-section-tabs button:focus-visible {
    border-color: rgba(255, 90, 0, 0.28);
    background: var(--accent-soft);
    color: var(--accent);
    outline: 0;
}

.architecture-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.85fr);
    gap: clamp(22px, 4vw, 42px);
    align-items: stretch;
}

.architecture-hero > div,
.architecture-summary,
.architecture-section {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 20px 54px rgba(23, 32, 51, 0.07);
}

.architecture-hero > div {
    padding: clamp(34px, 5vw, 64px);
}

.architecture-hero h1 {
    max-width: 880px;
    margin: 16px 0 0;
    color: var(--ink);
    font-size: clamp(48px, 6.2vw, 92px);
    line-height: 1;
    font-weight: 900;
    letter-spacing: 0;
}

.architecture-hero p,
.architecture-section-head p {
    max-width: 860px;
    margin: 18px 0 0;
    color: #536178;
    font-size: clamp(17px, 1.35vw, 21px);
    line-height: 1.62;
}

.architecture-summary {
    padding: clamp(26px, 3.4vw, 42px);
    background: #121827;
    color: #ffffff;
}

.architecture-summary h2 {
    margin: 0 0 22px;
    font-size: clamp(28px, 3vw, 42px);
    line-height: 1.1;
}

.architecture-summary ul {
    display: grid;
    gap: 16px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.architecture-summary li {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 14px;
    color: #e4e8f0;
}

.architecture-summary strong {
    color: #ffffff;
}

.architecture-section {
    padding: clamp(28px, 4vw, 48px);
}

.architecture-section-head {
    margin-bottom: clamp(20px, 3vw, 32px);
}

.architecture-section-head h2 {
    margin: 10px 0 0;
    color: var(--ink);
    font-size: clamp(34px, 4vw, 62px);
    line-height: 1.05;
    font-weight: 880;
}

.architecture-node-map {
    display: grid;
    grid-template-columns: repeat(5, minmax(180px, 1fr));
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
}

.architecture-node-map::-webkit-scrollbar {
    display: none;
}

.architecture-node-map article,
.architecture-card-grid article,
.architecture-file-list div {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fbfcff;
}

.architecture-node-map article {
    position: relative;
    min-height: 190px;
    padding: 20px;
}

.architecture-node-map article:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -13px;
    width: 14px;
    height: 2px;
    background: var(--accent);
}

.architecture-node-map span {
    color: var(--accent);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.12em;
}

.architecture-node-map h3,
.architecture-card-grid h3 {
    margin: 12px 0 0;
    color: var(--ink);
    font-size: 22px;
    line-height: 1.15;
}

.architecture-node-map p,
.architecture-card-grid p {
    margin: 12px 0 0;
    color: #536178;
    font-size: 15px;
    line-height: 1.55;
}

.architecture-card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.architecture-card-grid--four {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.architecture-card-grid article {
    min-height: 160px;
    padding: 22px;
}

.architecture-endpoints {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.architecture-endpoints code {
    display: block;
    min-width: 0;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #121827;
    color: #ffffff;
    font-size: 13px;
    overflow-wrap: anywhere;
}

.architecture-file-list {
    display: grid;
    gap: 10px;
}

.architecture-file-list div {
    display: grid;
    grid-template-columns: minmax(240px, 0.75fr) minmax(0, 1.25fr);
    gap: 16px;
    padding: 16px;
}

.architecture-file-list code {
    color: var(--accent);
    font-size: 14px;
    overflow-wrap: anywhere;
}

.architecture-file-list span {
    color: #536178;
    line-height: 1.55;
}

@media (max-width: 980px) {
    .architecture-section-tabs {
        justify-content: flex-start;
    }

    .architecture-hero,
    .architecture-card-grid,
    .architecture-card-grid--four,
    .architecture-endpoints,
    .architecture-file-list div {
        grid-template-columns: 1fr;
    }

    .architecture-summary li {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .architecture-node-map {
        grid-template-columns: repeat(5, 220px);
    }
}

@media (max-width: 560px) {
    .architecture-page {
        gap: 22px;
    }

    .architecture-section-tabs {
        top: calc(var(--topbar-offset, 66px) + 6px);
        padding: 10px;
    }

    .architecture-section-tabs button {
        min-height: 36px;
        padding: 0 12px;
        font-size: 13px;
    }

    .architecture-hero > div,
    .architecture-summary,
    .architecture-section {
        padding: 22px;
    }
}

body.is-about-page {
    background: #000000;
}

body.is-about-page .info-page-shell {
    width: 100%;
    max-width: none;
    min-height: calc(100vh - 66px);
    margin: 0;
    padding: clamp(16px, 2vw, 28px);
    background: #000000;
    color: #e1e0cc;
}

.about-cinematic {
    position: relative;
    overflow: hidden;
    min-height: calc(100vh - 122px);
    border: 1px solid rgba(222, 219, 200, 0.14);
    border-radius: 22px;
    background:
        radial-gradient(circle at 18% 10%, rgba(255, 90, 0, 0.2), transparent 31%),
        radial-gradient(circle at 86% 16%, rgba(222, 219, 200, 0.1), transparent 30%),
        linear-gradient(135deg, #090909 0%, #111111 54%, #060606 100%);
}

.about-noise {
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0.28;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
}

.about-cinematic-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(260px, 400px);
    align-items: center;
    gap: clamp(28px, 5vw, 76px);
    width: min(1320px, calc(100% - clamp(32px, 7vw, 110px)));
    min-height: calc(100vh - 126px);
    margin: 0 auto;
    padding: clamp(34px, 6vw, 78px) 0;
}

.about-copy-panel {
    max-width: 850px;
}

.about-kicker {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
    color: #dedbc8;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.about-kicker::before {
    width: 32px;
    height: 1px;
    content: "";
    background: rgba(222, 219, 200, 0.54);
}

.about-copy-panel h1 {
    max-width: 830px;
    margin: 0;
    color: #e1e0cc;
    font-size: clamp(38px, 5.6vw, 78px);
    line-height: 0.94;
    font-weight: 760;
    letter-spacing: 0;
}

.about-lede {
    max-width: 660px;
    margin: 22px 0 0;
    color: rgba(225, 224, 204, 0.72);
    font-size: clamp(15px, 1.2vw, 18px);
    line-height: 1.55;
}

.about-story-grid {
    grid-column: 1;
    grid-row: 2;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    max-width: 760px;
    margin-top: 0;
}

.about-story-card {
    min-height: 150px;
    padding: 16px;
    border: 1px solid rgba(222, 219, 200, 0.12);
    border-radius: 12px;
    background: rgba(33, 33, 33, 0.78);
}

.about-story-card span {
    display: block;
    color: rgba(222, 219, 200, 0.56);
    font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.12em;
}

.about-story-card h2 {
    margin: 14px 0 0;
    color: #e1e0cc;
    font-size: 18px;
    line-height: 1.15;
    font-weight: 760;
}

.about-story-card p {
    margin: 8px 0 0;
    color: rgba(225, 224, 204, 0.66);
    font-size: 13px;
    line-height: 1.5;
}

.about-photo-panel {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: center;
    justify-self: end;
    width: min(100%, 400px);
}

.about-photo-frame {
    overflow: hidden;
    border: 1px solid rgba(222, 219, 200, 0.18);
    border-radius: 18px;
    background: #050505;
}

.about-photo-frame img {
    display: block;
    width: 100%;
    height: auto;
    max-height: 520px;
    object-fit: contain;
    object-position: center;
}

.about-profile-strip {
    display: grid;
    gap: 12px;
    margin-top: 12px;
    padding: 16px;
    border: 1px solid rgba(222, 219, 200, 0.14);
    border-radius: 16px;
    background: rgba(16, 16, 16, 0.92);
}

.about-profile-strip strong {
    display: block;
    color: #e1e0cc;
    font-size: 22px;
    line-height: 1.1;
}

.about-profile-strip span {
    display: block;
    margin-top: 6px;
    color: rgba(225, 224, 204, 0.62);
    font-size: 13px;
    line-height: 1.45;
}

.about-cinematic .about-profile-link {
    min-height: 34px;
    margin-top: 0;
    border-color: rgba(222, 219, 200, 0.24);
    color: #e1e0cc;
    background: rgba(255, 255, 255, 0.03);
}

.about-cinematic .about-profile-link:hover,
.about-cinematic .about-profile-link:focus-visible {
    border-color: #ff8a3d;
    color: #ff8a3d;
}

body.is-about-page .site-footer {
    margin-top: 0;
    border-top-color: rgba(222, 219, 200, 0.12);
    background:
        radial-gradient(circle at 82% 0%, rgba(255, 90, 0, 0.12), transparent 28%),
        #000000;
}

body.is-about-page .footer-inner {
    padding: 42px 0 52px;
}

body.is-about-page .footer-space-bg {
    opacity: 0.5;
}

body.is-about-page .footer-logo,
body.is-about-page .footer-links a:hover,
body.is-about-page .footer-links a:focus-visible {
    color: #e1e0cc;
}

/* White About page override */
body.is-about-page {
    background: #ffffff;
}

body.is-about-page .info-page-shell {
    width: min(1180px, calc(100% - 48px));
    max-width: 1180px;
    min-height: calc(100vh - 180px);
    margin: 0 auto;
    padding: clamp(44px, 7vw, 86px) 0 72px;
    background: #ffffff;
    color: #172033;
}

.about-standard {
    display: grid;
    gap: clamp(28px, 4vw, 44px);
    background: #ffffff;
}

.about-standard-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 390px);
    gap: clamp(28px, 5vw, 72px);
    align-items: center;
}

.about-standard-copy {
    max-width: 720px;
}

.about-standard-copy h1 {
    margin: 0;
    color: #172033;
    font-size: clamp(52px, 7vw, 96px);
    line-height: 1.02;
    font-weight: 850;
    letter-spacing: 0;
}

.about-standard-copy h2 {
    max-width: 680px;
    margin: 20px 0 0;
    color: #172033;
    font-size: clamp(22px, 2.4vw, 32px);
    line-height: 1.22;
    font-weight: 760;
    letter-spacing: 0;
}

.about-standard-copy p {
    max-width: 660px;
    margin: 16px 0 0;
    color: #4f5b70;
    font-size: clamp(15px, 1.2vw, 18px);
    line-height: 1.58;
}

.about-github-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    margin-top: 28px;
    padding: 0 18px;
    border: 1px solid #172033;
    border-radius: 8px;
    background: #172033;
    color: #ffffff;
    font-size: 15px;
    font-weight: 800;
}

.about-github-link:hover,
.about-github-link:focus-visible {
    border-color: #e85d24;
    background: #e85d24;
    color: #ffffff;
    outline: 0;
}

.about-standard-photo {
    margin: 0;
}

.about-standard-image-frame {
    display: block;
    overflow: hidden;
    border-radius: 14px;
    background: #ffffff;
}

.about-standard-image-frame img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
    object-position: center center;
    border-radius: 14px;
}

.about-standard-caption {
    display: grid;
    gap: 5px;
    margin-top: 12px;
}

.about-standard-caption strong {
    color: #172033;
    font-size: 20px;
    line-height: 1.2;
}

.about-standard-caption span {
    color: #607089;
    font-size: 14px;
    line-height: 1.45;
}

.about-standard-points {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.about-standard-points article {
    min-height: 170px;
    padding: 22px;
    border: 1px solid #e4e8f0;
    border-radius: 10px;
    background: #ffffff;
}

.about-standard-points h3 {
    margin: 0;
    color: #172033;
    font-size: 20px;
    line-height: 1.2;
}

.about-standard-points p {
    margin: 12px 0 0;
    color: #536178;
    font-size: 15px;
    line-height: 1.55;
}

@media (max-width: 900px) {
    .about-standard-grid,
    .about-standard-points {
        grid-template-columns: 1fr;
    }

    .about-standard-photo {
        width: min(100%, 360px);
    }
}

@media (max-width: 520px) {
    body.is-about-page .info-page-shell {
        width: calc(100% - 28px);
        padding: 34px 0 56px;
    }

    .about-standard-copy h1 {
        font-size: 42px;
    }

    .about-standard-copy h2 {
        font-size: 22px;
    }

    .about-standard-copy p {
        font-size: 16px;
        line-height: 1.58;
    }

    .about-standard-points article {
        min-height: 0;
        padding: 18px;
    }
}

@media (max-width: 920px) {
    .about-cinematic-grid {
        grid-template-columns: 1fr;
        align-items: start;
        width: min(680px, calc(100% - 32px));
        min-height: 0;
        gap: 22px;
    }

    .about-story-grid {
        grid-column: auto;
        grid-row: auto;
        grid-template-columns: 1fr;
    }

    .about-photo-panel {
        grid-column: auto;
        grid-row: auto;
        justify-self: start;
        width: min(100%, 340px);
    }

    .about-photo-frame img {
        max-height: 430px;
    }
}

@media (max-width: 520px) {
    body.is-about-page .info-page-shell {
        padding: 12px;
    }

    .about-cinematic {
        min-height: 0;
        border-radius: 18px;
    }

    .about-cinematic-grid {
        width: calc(100% - 28px);
        padding: 28px 0;
    }

    .about-copy-panel h1 {
        font-size: 28px;
        line-height: 1.02;
    }

    .about-lede {
        margin-top: 16px;
        font-size: 13px;
        line-height: 1.48;
    }

    .about-kicker {
        margin-bottom: 14px;
        font-size: 9px;
    }

    .about-story-grid {
        gap: 8px;
    }

    .about-story-card {
        min-height: 0;
        padding: 13px;
    }

    .about-story-card h2 {
        margin-top: 10px;
        font-size: 16px;
    }

    .about-story-card p {
        font-size: 12px;
        line-height: 1.45;
    }

    .about-photo-panel {
        width: 100%;
        max-width: 320px;
    }

    .about-photo-frame img {
        max-height: 390px;
    }
}

.site-footer {
    position: relative;
    width: 100%;
    max-width: none;
    margin: 72px 0 0;
    overflow: hidden;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    background:
        linear-gradient(135deg, #0b101a 0%, #030509 70%),
        #030509;
    color: #ffffff;
}

.footer-space-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.footer-space-bg::after {
    position: absolute;
    inset: 0;
    content: "";
    background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0));
    background-size: 100% 5px;
    opacity: 0.22;
}

.footer-orbit-ring {
    position: absolute;
    bottom: -380px;
    left: 8%;
    width: 720px;
    height: 720px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    animation: footerOrbit 120s linear infinite;
}

.footer-orbit-ring--two {
    bottom: -470px;
    left: 2%;
    width: 920px;
    height: 920px;
    border-color: rgba(255, 93, 0, 0.12);
    animation-duration: 150s;
    animation-direction: reverse;
}

.footer-star {
    position: absolute;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: #ffffff;
    opacity: 0.72;
    animation: footerTwinkle 3.8s ease-in-out infinite;
}

.footer-star--one {
    top: 24%;
    left: 10%;
}

.footer-star--two {
    top: 46%;
    left: 77%;
    width: 6px;
    height: 6px;
    animation-delay: 0.8s;
}

.footer-star--three {
    top: 72%;
    left: 32%;
    width: 2px;
    height: 2px;
    opacity: 0.55;
    animation: none;
}

.footer-star--four {
    top: 24%;
    right: 18%;
    background: #ff8a3d;
    animation-delay: 1.5s;
}

.footer-star--five {
    top: 70%;
    right: 24%;
    width: 3px;
    height: 3px;
    animation-delay: 0.35s;
}

.footer-shooting-star {
    position: absolute;
    top: 18%;
    right: 22%;
    width: 150px;
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.78), rgba(255, 93, 0, 0.82));
    opacity: 0.6;
    transform: rotate(-45deg);
    animation: footerShootingStar 7s linear infinite;
}

.footer-inner {
    position: relative;
    z-index: 1;
    width: min(1480px, calc(100% - 48px));
    margin: 0 auto;
    padding: clamp(72px, 9vw, 136px) 0;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 48px;
}

.footer-brand-block {
    max-width: 560px;
}

.footer-logo {
    display: inline-block;
    color: #ffffff;
    font-size: 32px;
    font-weight: 900;
    line-height: 1;
    letter-spacing: 0;
}

.footer-logo span {
    color: #ff5a00;
}

.footer-brand-block p {
    max-width: 520px;
    margin: 22px 0 0;
    color: #aeb7c6;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.7;
}

.footer-bottom {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 36px;
    color: #717d90;
    font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12px;
    letter-spacing: 0;
}

.footer-pulse {
    width: 5px;
    height: 5px;
    flex: 0 0 auto;
    border-radius: 50%;
    background: #ff5a00;
    animation: footerPulse 2.8s ease-in-out infinite;
}

.footer-nav-block {
    display: grid;
    justify-items: end;
    gap: 14px;
    min-width: min(100%, 420px);
}

.footer-index-label {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #697386;
    font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.footer-index-label span {
    width: 34px;
    height: 1px;
    background: rgba(148, 163, 184, 0.42);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 14px 24px;
    max-width: 520px;
}

.footer-links a {
    color: #aeb7c6;
    font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.footer-links a:hover,
.footer-links a:focus-visible {
    color: #ff8a3d;
    outline: 0;
}

@keyframes footerOrbit {
    to {
        transform: rotate(360deg);
    }
}

@keyframes footerTwinkle {
    0%,
    100% {
        opacity: 0.32;
    }

    50% {
        opacity: 0.95;
    }
}

@keyframes footerShootingStar {
    0% {
        opacity: 0;
        transform: translate(0, 0) rotate(-45deg);
    }

    10% {
        opacity: 0.65;
    }

    100% {
        opacity: 0;
        transform: translate(-900px, 900px) rotate(-45deg);
    }
}

@keyframes footerPulse {
    0%,
    100% {
        opacity: 0.45;
    }

    50% {
        opacity: 1;
    }
}

.player-frame-shell {
    height: calc(100vh - 88px);
    margin: 0 16px 16px;
    overflow: hidden;
    border: 1px solid #e7ebf2;
    border-radius: 16px;
    background: #ffffff;
}

.lesson-frame {
    display: block;
    width: 100%;
    height: 100%;
    border: 0;
    background: #ffffff;
}

.demo-carousel-stack {
    display: grid;
    gap: 0;
}

.demo-carousel-block {
    width: min(calc(100% - 48px), calc(100vw - 48px));
    max-width: min(var(--carousel-max-width, 1480px), calc(100vw - 48px));
    margin: var(--carousel-block-top, 40px) auto 0;
    padding: 18px 0 var(--carousel-block-bottom, 44px);
    content-visibility: auto;
    contain-intrinsic-size: 740px;
}

.demo-carousel-block[data-align="left"] {
    margin-left: 24px;
    margin-right: auto;
}

.demo-carousel-block[data-align="right"] {
    margin-left: auto;
    margin-right: 24px;
}

.demo-carousel-block[data-align="stretch"] {
    width: calc(100vw - 48px);
    max-width: calc(100vw - 48px);
}

.carousel-text-block {
    width: min(var(--carousel-copy-max-width, 860px), 100%);
    margin: 0 0 var(--carousel-text-gap, 28px);
    color: var(--carousel-copy-color, var(--ink));
    font-family: var(--carousel-copy-font, Inter, system-ui, sans-serif);
    font-size: var(--carousel-copy-size, 44px);
    line-height: 1.08;
    font-weight: 820;
    letter-spacing: 0;
    text-align: var(--carousel-copy-align, left);
}

.demo-carousel-block[data-align="center"] .carousel-text-block,
.demo-carousel-block[data-copy-align="center"] .carousel-text-block,
.carousel-text-block[data-copy-align="center"] {
    margin-left: auto;
    margin-right: auto;
}

.demo-carousel-block[data-align="right"] .carousel-text-block,
.demo-carousel-block[data-copy-align="right"] .carousel-text-block,
.carousel-text-block[data-copy-align="right"] {
    margin-left: auto;
}

.carousel-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 14px;
    text-align: var(--carousel-heading-align, left);
}

.carousel-heading.is-controls-only {
    justify-content: flex-end;
    min-height: 38px;
}

.carousel-heading > div {
    text-align: var(--carousel-heading-align, left);
}

.carousel-heading h3 {
    margin: 0;
    color: var(--carousel-heading-color, var(--ink));
    font-family: var(--carousel-heading-font, Inter, system-ui, sans-serif);
    font-size: var(--carousel-heading-size, 28px);
    line-height: 1.12;
    font-weight: 780;
}



.carousel-controls {
    display: flex;
    gap: 8px;
}

.carousel-controls.is-hidden {
    display: none;
}

.carousel-controls--below {
    justify-content: center;
    margin-top: 12px;
}

.carousel-button {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: #ffffff;
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(29, 41, 57, 0.04);
    transition: border-color 160ms ease, background 160ms ease;
}

.carousel-button svg {
    width: 20px;
    height: 20px;
    fill: #4d5870;
}

.carousel-button:hover {
    border-color: rgba(255, 90, 0, 0.5);
    background: var(--accent-soft);
}

.carousel-button--sm {
    width: 30px;
    height: 30px;
}

.carousel-button--sm svg {
    width: 16px;
    height: 16px;
}

.carousel-viewport {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    position: relative;
    scroll-padding-right: var(--carousel-end-pad, 24px);
    scrollbar-width: none;
    -ms-overflow-style: none;
    overscroll-behavior-x: contain;
    scroll-behavior: auto;
    touch-action: pan-y pinch-zoom;
}

.carousel-viewport::-webkit-scrollbar {
    display: none;
}

.featured-demo-rail,
.compact-demo-rail {
    display: flex;
    width: max-content;
    min-width: 100%;
    box-sizing: border-box;
    padding-right: var(--carousel-end-pad, 24px);
    justify-content: flex-start;
    transition: transform 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
    contain: style;
}

.featured-demo-rail.is-static,
.compact-demo-rail.is-static {
    justify-content: var(--carousel-rail-align, flex-start);
    transform: none !important;
}

.featured-demo-rail {
    gap: var(--carousel-gap, 12px);
}

.featured-demo-rail .demo-feature-card {
    flex: 0 0 var(--card-width, var(--fit-card-width, calc(50% - 6px)));
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
}

.demo-feature-card {
    position: relative;
    height: var(--card-height, 420px);
    min-height: var(--card-height, 420px);
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--card-bg, #111827);
    box-shadow: none;
    contain: layout paint style;
    animation: none;
}

.demo-feature-card.is-secondary .demo-card-meta h4 {
    font-size: var(--card-title-size, 21px);
}

.demo-card-media-shell {
    position: absolute;
    inset: 0;
    overflow: hidden;
    background: #111827;
}

.demo-feature-card iframe,
.demo-feature-card .carousel-card-image,
.demo-feature-card .carousel-html-media,
.demo-feature-card .carousel-icon-media {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
    background: #111827;
    display: block;
    pointer-events: none;
}

.hero-card-media .carousel-html-frame,
.demo-feature-card .carousel-html-frame,
.compact-card-media .carousel-html-frame {
    width: 100% !important;
    height: 100% !important;
    transform: none !important;
    transform-origin: center center !important;
}

.demo-feature-card .carousel-card-image {
    object-fit: cover;
}

.demo-feature-card .carousel-html-media {
    background: #111827;
}

.demo-feature-card .carousel-html-media > * {
    width: 100%;
    min-height: 100%;
}

.carousel-icon-media {
    display: grid;
    place-items: center;
    background:
        radial-gradient(circle at 72% 28%, color-mix(in srgb, var(--card-color) 34%, transparent), transparent 28%),
        linear-gradient(135deg, #111827, #243a59);
    color: #ffffff;
    font-size: 72px;
}

.demo-feature-card.is-loading::before {
    position: absolute;
    inset: 0;
    content: "";
    background:
        radial-gradient(circle at 72% 28%, rgba(255, 90, 0, 0.22), transparent 25%),
        linear-gradient(135deg, #f6f8fc, #e8edf7);
}

.demo-feature-card::after {
    display: none;
}

.demo-card-meta {
    position: absolute;
    left: 22px;
    right: 22px;
    bottom: 18px;
    z-index: 2;
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 18px;
    color: #ffffff;
    text-align: var(--card-text-align, left);
}

.demo-feature-card[data-text-position="top"] .demo-card-meta {
    top: 18px;
    bottom: auto;
    align-items: start;
}

.demo-feature-card[data-text-position="center"] .demo-card-meta {
    top: 50%;
    bottom: auto;
    transform: translateY(-50%);
    align-items: center;
}

.demo-feature-card[data-text-position="hidden"] .demo-card-meta,
.compact-demo-card[data-text-position="hidden"] .compact-card-copy {
    display: none;
}

.demo-feature-card[data-text-position="hidden"]::after {
    display: none;
}

.demo-card-meta h4 {
    margin: 0;
    color: var(--card-title-color, #ffffff);
    font-family: var(--card-title-font, Inter, system-ui, sans-serif);
    font-size: var(--card-title-size, 24px);
    line-height: 1.1;
}

.demo-card-meta span {
    display: block;
    margin-top: 5px;
    color: var(--card-sub-color, rgba(255, 255, 255, 0.72));
    font-family: var(--card-sub-font, Inter, system-ui, sans-serif);
    font-size: var(--card-sub-size, 13px);
    font-weight: 650;
}

.demo-card-meta a,
.demo-card-meta button {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 13px;
    border-radius: 999px;
    border: 0;
    background: rgba(255, 255, 255, 0.92);
    color: #111827;
    font-size: 13px;
    font-weight: 760;
    white-space: nowrap;
    cursor: pointer;
}

.hero-carousel-card,
.demo-feature-card,
.compact-demo-card,
.demo-card-media-shell,
.compact-card-media,
.hero-card-media,
.demo-feature-card iframe,
.demo-feature-card .carousel-card-image,
.demo-feature-card .carousel-html-media,
.demo-feature-card .carousel-icon-media,
.compact-demo-card iframe,
.compact-demo-card img,
.compact-demo-card .carousel-html-media {
    box-shadow: none !important;
}

.compact-demo-rail {
    gap: var(--carousel-gap, 10px);
    margin-top: 10px;
}

.compact-demo-rail .compact-demo-card {
    flex: 0 0 var(--card-width, var(--fit-card-width, calc(20% - 8px)));
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
}

.compact-demo-card {
    position: relative;
    display: grid;
    align-content: end;
    height: var(--card-height, 148px);
    min-height: var(--card-height, 148px);
    padding: 16px;
    overflow: hidden;
    border-radius: 8px;
    color: #ffffff;
    isolation: isolate;
    animation: none;
    cursor: pointer;
}

@keyframes demoCardIn {
    from {
        opacity: 0.82;
        transform: translateX(8px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.compact-demo-card::before {
    position: absolute;
    inset: 0;
    z-index: -1;
    content: "";
    background: var(--compact-bg);
}

.compact-demo-card::after {
    position: absolute;
    inset: 0;
    z-index: -1;
    content: "";
    background: linear-gradient(180deg, rgba(8, 13, 25, 0) 42%, rgba(8, 13, 25, 0.38));
}

.compact-card-media {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.compact-card-media iframe,
.compact-card-media img,
.compact-card-media .carousel-html-media {
    width: 100%;
    height: 100%;
    border: 0;
    object-fit: cover;
    pointer-events: none;
}

.compact-card-media .carousel-html-media > * {
    width: 100%;
    min-height: 100%;
}

.compact-card-copy {
    position: relative;
    z-index: 1;
    text-align: var(--card-text-align, left);
}

.compact-demo-card[data-text-position="top"] {
    align-content: start;
}

.compact-demo-card[data-text-position="center"] {
    align-content: center;
}

.compact-demo-card b {
    color: var(--card-title-color, #ffffff);
    font-family: var(--card-title-font, Inter, system-ui, sans-serif);
    font-size: var(--card-title-size, 14px);
    line-height: 1.25;
}

.compact-demo-card span {
    margin-top: 7px;
    color: var(--card-sub-color, rgba(255, 255, 255, 0.78));
    font-family: var(--card-sub-font, Inter, system-ui, sans-serif);
    font-size: var(--card-sub-size, 12px);
    font-weight: 650;
}

.demo-feature-card[data-frame-style="flush"] {
    border: 0 !important;
    border-radius: 0 !important;
    outline: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
}

.demo-feature-card[data-frame-style="flush"]::after,
.compact-demo-card[data-frame-style="flush"]::before,
.compact-demo-card[data-frame-style="flush"]::after {
    display: none;
}

.demo-feature-card[data-frame-style="flush"] .demo-card-media-shell,
.demo-feature-card[data-frame-style="flush"] iframe,
.demo-feature-card[data-frame-style="flush"] .carousel-card-image,
.demo-feature-card[data-frame-style="flush"] .carousel-html-media,
.demo-feature-card[data-frame-style="flush"] .carousel-icon-media,
.compact-demo-card[data-frame-style="flush"],
.compact-demo-card[data-frame-style="flush"] .compact-card-media,
.compact-demo-card[data-frame-style="flush"] iframe,
.compact-demo-card[data-frame-style="flush"] img,
.compact-demo-card[data-frame-style="flush"] .carousel-html-media {
    border: 0 !important;
    border-radius: 0 !important;
    outline: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
}

.demo-feature-card[data-frame-style="flush"] .demo-card-meta {
    background: transparent;
}

.demo-feature-card[data-content-type="image"][data-frame-style="flush"] {
    height: var(--card-height, 420px) !important;
    min-height: 0 !important;
}

.demo-feature-card[data-content-type="image"][data-frame-style="flush"] .demo-card-media-shell {
    position: absolute !important;
    inset: 0 !important;
    width: 100% !important;
    height: 100% !important;
}

.compact-demo-card[data-frame-style="flush"] {
    padding: 0;
}

.compact-demo-card[data-frame-style="flush"] .compact-card-media {
    z-index: 0;
}

.compact-demo-card[data-frame-style="flush"] .compact-card-copy {
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 14px;
}

.compact-demo-card[data-frame-style="flush"][data-text-position="top"] .compact-card-copy {
    top: 14px;
    bottom: auto;
}

.compact-demo-card[data-frame-style="flush"][data-text-position="center"] .compact-card-copy {
    top: 50%;
    bottom: auto;
    transform: translateY(-50%);
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(240px, 1fr));
    align-items: start;
    gap: 24px;
    padding-top: 24px;
}

.course-card {
    position: relative;
    display: grid;
    grid-template-rows: 168px 1fr;
    min-height: 318px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel-bg);
    box-shadow: 0 1px 2px rgba(29, 41, 57, 0.04);
    transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
    contain: content;
    cursor: pointer;
}

.course-card:hover,
.course-card:focus-visible {
    transform: translateY(-2px);
    border-color: #c9d2ff;
    box-shadow: var(--shadow);
    outline: 0;
}

.course-card--standalone {
    display: flex;
    flex-direction: column;
    min-height: 318px;
    padding: 0;
}

.course-card--standalone .thumb-python {
    flex: 1;
    min-height: 318px;
    position: relative;
    border-radius: var(--radius);
}

.course-label--standalone {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 20;
    padding: 6px 10px;
    border-radius: 4px;
    background: #101827;
    color: #fff;
    font-size: 11px;
    font-weight: 850;
    letter-spacing: 0.05em;
}

.card-media {
    position: relative;
    overflow: hidden;
    background: #eef2f6;
}

.card-media::after {
    position: absolute;
    inset: 0;
    content: "";
    pointer-events: none;
    background-image: radial-gradient(rgba(23, 32, 51, 0.09) 1px, transparent 1px);
    background-size: 8px 8px;
    opacity: 0.28;
}

.card-media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-media .thumbnail-frame {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
    background: transparent;
    pointer-events: none;
}

.card-media[data-thumbnail="document"]::after {
    display: none;
}

.thumbnail-card {
    position: absolute;
    inset: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    overflow: hidden;
    isolation: isolate;
    container-type: inline-size;
    font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    background:
        radial-gradient(circle at 30% 25%, var(--glow-top-left, rgba(255, 255, 255, 0.1)), transparent 45%),
        radial-gradient(circle at 78% 70%, var(--glow-bottom-right, rgba(255, 255, 255, 0.1)), transparent 35%),
        linear-gradient(135deg, var(--bg-dark-1, #181818) 0%, var(--bg-dark-2, #2d2d2d) 52%, var(--bg-dark-3, var(--bg-dark-1, #181818)) 100%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.thumbnail-badge {
    position: absolute;
    top: var(--badge-top, 8%);
    left: var(--badge-left, 6%);
    z-index: 3;
    padding: 1.5cqi 3cqi;
    border-radius: 1.5cqi;
    background: var(--badge-bg, #ffd43b);
    color: var(--badge-text, #000000);
    font-size: var(--badge-size, 2.5cqi);
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.thumbnail-title {
    position: absolute;
    left: var(--title-left, 6%);
    top: var(--title-top, 55%);
    bottom: auto !important;
    z-index: 3;
    max-width: var(--title-width, 60%);
    margin: 0;
    transform: translateY(-50%);
    color: var(--title-color, #ffffff);
    font-size: var(--title-size, 7.5cqi);
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: 0;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.thumbnail-logo {
    position: absolute;
    right: var(--logo-right, 6%);
    top: var(--logo-top, 50%);
    bottom: auto !important;
    z-index: 2;
    width: var(--logo-size, 22cqi);
    transform: translateY(-50%);
    filter:
        drop-shadow(0 10px 8px rgba(0, 0, 0, 0.34))
        drop-shadow(0 4px 4px rgba(0, 0, 0, 0.24));
}

.thumbnail-logo img,
.thumbnail-logo svg {
    display: block;
    width: 100%;
    height: auto;
}

.thumbnail-logo-text {
    display: grid;
    place-items: center;
    width: 100%;
    aspect-ratio: 1;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.92);
    color: #111827;
    font-size: clamp(24px, 8cqi, 58px);
    font-weight: 900;
    line-height: 1;
    letter-spacing: 0;
    box-shadow: 0 18px 34px rgba(0, 0, 0, 0.24);
}

.course-label {
    position: absolute;
    top: 18px;
    left: 18px;
    z-index: 2;
    padding: 4px 7px;
    border-radius: 3px;
    background: #101827;
    color: #ffffff;
    font-size: 10px;
    font-weight: 850;
    letter-spacing: 0.05em;
}

.card-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 18px 18px 16px;
}

.course-card-footer {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 12px;
    margin-top: auto;
}

.course-pin-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 38px;
    height: 38px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    color: #172033;
    cursor: pointer;
}

.course-pin-icon svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
}

.course-pin-icon:hover,
.course-pin-icon.is-pinned {
    border-color: rgba(249, 115, 22, 0.42);
    background: #fff2e1;
    color: #8a3a08;
}

.course-title {
    margin: 0;
    color: var(--ink);
    font-size: 22px;
    line-height: 1.24;
    font-weight: 760;
}

.course-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 650;
}

.course-meta span + span::before {
    content: "";
    display: inline-block;
    width: 4px;
    height: 4px;
    margin: 0 10px 2px 0;
    border-radius: 50%;
    background: var(--line-strong);
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    align-items: end;
}

.tag {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    max-width: 100%;
    padding: 0 8px;
    border: 1px solid #5f6b7d;
    border-radius: 999px;
    color: #263348;
    background: #ffffff;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
}

.course-detail-tags .tag {
    min-height: 26px;
    max-width: 100%;
    white-space: normal;
    line-height: 1.2;
}

.html-thumb {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: grid;
    place-items: center;
    padding: 50px 24px 18px;
}

/* Python Thumbnail */
.thumb-python {
    background: #0f172a; /* slate-900 */
    overflow: hidden;
}

.python-bg-shape-1 {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-100%, -100%);
    width: 160px;
    height: 160px;
    background: #153b5c;
    border-radius: 50%;
    mix-blend-mode: screen;
    filter: blur(50px);
}

.python-bg-shape-2 {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(25%, -25%);
    width: 160px;
    height: 160px;
    background: #FFD43B;
    border-radius: 50%;
    mix-blend-mode: screen;
    filter: blur(50px);
    opacity: 0.3;
}

.python-glass-card {
    position: relative;
    width: 100%;
    height: 100%;
    background: rgba(48, 105, 152, 0.4);
    backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 212, 59, 0.3);
    z-index: 10;
}

.python-title {
    font-family: 'JetBrains Mono', monospace, sans-serif;
    font-size: 22px;
    font-weight: 700;
    line-height: 1.1;
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: white;
    max-width: 60%;
    margin: 0;
}

.python-logo-wrapper {
    position: absolute;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    filter: drop-shadow(0 15px 10px rgba(0, 0, 0, 0.3)) drop-shadow(0 4px 6px rgba(0, 0, 0, 0.2));
}

.python-logo-wrapper img {
    width: 64px;
    height: 64px;
    object-fit: contain;
}

/* Hide duplicated title in info box since it's already in the thumbnail */
.card-media[data-course-id="python-start"] + .card-body .course-title {
    display: none;
}

.thumb-terminal {
    background: linear-gradient(135deg, #dff5ee, #f5f7ff);
}

.terminal-box {
    width: min(220px, 86%);
    border: 1px solid rgba(38, 51, 72, 0.14);
    border-radius: 8px;
    background: #101827;
    box-shadow: 0 16px 28px rgba(16, 24, 39, 0.18);
    overflow: hidden;
}

.terminal-dots {
    display: flex;
    gap: 5px;
    height: 24px;
    padding: 8px 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.terminal-dots span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #5f6df6;
}

.terminal-dots span:nth-child(2) {
    background: #22a06b;
}

.terminal-dots span:nth-child(3) {
    background: #f4b64a;
}

.terminal-lines {
    display: grid;
    gap: 8px;
    padding: 16px;
}

.terminal-lines span {
    height: 8px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.68);
}

.terminal-lines span:nth-child(2) {
    width: 72%;
    background: rgba(255, 90, 0, 0.86);
}

.terminal-lines span:nth-child(3) {
    width: 54%;
    background: rgba(34, 160, 107, 0.86);
}

.thumb-stack {
    background: linear-gradient(135deg, #fff0dc, #eef1ff);
}

.stack-tiles {
    display: grid;
    grid-template-columns: repeat(3, 58px);
    gap: 10px;
    transform: rotate(-4deg);
}

.stack-tiles span {
    height: 58px;
    border: 1px solid rgba(38, 51, 72, 0.12);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 10px 20px rgba(29, 41, 57, 0.1);
}

.stack-tiles span:nth-child(2) {
    background: #5f6df6;
}

.stack-tiles span:nth-child(3) {
    background: #20a67a;
}

.thumb-circuit {
    background: linear-gradient(135deg, #e7f7ff, #f8ecff);
}

.circuit-board {
    position: relative;
    width: 210px;
    height: 86px;
    border: 1px solid rgba(38, 51, 72, 0.12);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 14px 26px rgba(51, 65, 85, 0.12);
}

.circuit-board::before,
.circuit-board::after {
    position: absolute;
    content: "";
    background: #5f6df6;
}

.circuit-board::before {
    left: 28px;
    right: 28px;
    top: 42px;
    height: 4px;
    border-radius: 999px;
}

.circuit-board::after {
    top: 20px;
    left: 86px;
    width: 38px;
    height: 38px;
    border-radius: 8px;
    background: #172033;
    box-shadow: -58px 18px 0 -10px #20a67a, 58px 18px 0 -10px #f4b64a;
}

.thumb-cloud {
    background: linear-gradient(135deg, #f3f7dc, #e5f2ff);
}

.cloud-badge {
    width: 188px;
    height: 84px;
    border-radius: 42px;
    background: #ffffff;
    box-shadow: 0 16px 28px rgba(29, 41, 57, 0.12);
    position: relative;
}

.cloud-badge::before,
.cloud-badge::after {
    position: absolute;
    content: "";
    border-radius: 50%;
    background: #ffffff;
}

.cloud-badge::before {
    width: 82px;
    height: 82px;
    left: 32px;
    top: -34px;
}

.cloud-badge::after {
    width: 66px;
    height: 66px;
    right: 34px;
    top: -22px;
}

.cloud-line {
    position: absolute;
    left: 45px;
    right: 45px;
    bottom: 31px;
    z-index: 1;
    height: 8px;
    border-radius: 999px;
    background: #5f6df6;
}

.empty-state {
    grid-column: 1 / -1;
    display: grid;
    place-items: center;
    min-height: 280px;
    border: 1px dashed var(--line-strong);
    border-radius: 8px;
    color: var(--muted);
    background: #ffffff;
    font-weight: 700;
}

.pager {
    display: flex;
    justify-content: center;
    gap: 6px;
    padding-top: 28px;
    max-width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
}

.pager button {
    min-width: 44px;
    height: 40px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    color: #263348;
    cursor: pointer;
}

.pager::-webkit-scrollbar {
    display: none;
}

.pager button.is-active {
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 800;
}

.pager button:disabled {
    color: #c2cad8;
    cursor: not-allowed;
}

.pager-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    color: #8a94a8;
    font-weight: 800;
}

@media (max-width: 1180px) {
    .topbar {
        flex-wrap: wrap;
        gap: 12px 18px;
        align-items: center;
        padding: 12px 24px;
    }

    .main-nav {
        order: 3;
        width: 100%;
        overflow-x: auto;
        padding-bottom: 2px;
    }

    .course-mega-menu {
        padding: calc(var(--topbar-offset, 90px) + 24px) 24px 28px;
    }

    .course-mega-inner {
        grid-template-columns: 1fr;
        gap: 22px;
    }

    .mega-topic-groups {
        grid-template-columns: repeat(2, minmax(150px, 1fr));
    }

    .top-actions {
        justify-content: stretch;
    }

    .search-box {
        width: 100%;
    }

    .hero-section {
        grid-template-columns: 1fr;
        padding-top: 42px;
    }

    .hero-carousel-card-shell,
    .lab-window {
        margin: 0;
    }

    .catalog-shell {
        grid-template-columns: 230px minmax(0, 1fr);
        gap: 24px;
    }

    .course-grid {
        grid-template-columns: repeat(2, minmax(240px, 1fr));
    }

    .course-detail-layout {
        grid-template-columns: minmax(280px, 420px) minmax(0, 1fr);
        gap: 24px;
    }

    .course-player-layout {
        grid-template-columns: 295px minmax(0, 1fr);
    }

    .player-toolbar {
        grid-template-columns: 140px minmax(0, 1fr) auto;
    }

    .auth-layout {
        grid-template-columns: 1fr;
    }

    .pinned-grid {
        grid-template-columns: repeat(2, minmax(220px, 1fr));
    }

    .info-page-hero {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 820px) {
    .is-course-player {
        overflow: auto;
    }

    .top-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    .hero-section {
        width: calc(100% - 28px);
        max-width: calc(100% - 28px);
        min-height: 0;
        padding: 24px 0 20px;
    }

    .hero-copy {
        margin-left: 0;
    }

    .hero-title {
        display: block;
        font-size: clamp(40px, 12vw, 50px);
        line-height: 0.98;
    }

    .hero-heading {
        max-width: 440px;
        margin-top: 14px;
        font-size: clamp(24px, 7vw, 32px);
        line-height: 1.12;
    }

    .hero-subheading {
        max-width: 420px;
        margin-top: 16px;
        padding-left: 14px;
        font-size: clamp(15px, 4.2vw, 17px);
        line-height: 1.48;
        text-wrap: pretty;
    }

    .hero-subheading strong {
        font-size: clamp(18px, 5vw, 22px);
    }

    .hero-actions {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        max-width: 420px;
        margin-top: 18px;
    }

    .primary-action,
    .secondary-action {
        min-height: 42px;
        padding: 0 12px;
        font-size: 14px;
        white-space: nowrap;
    }

    .hero-visual {
        display: none;
    }

    .course-mega-menu {
        top: 0;
        max-height: 100vh;
        overflow-y: auto;
        padding: calc(var(--topbar-offset, 118px) + 22px) 18px 28px;
    }

    .mega-topic-groups {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .mega-all-modules {
        font-size: 28px;
    }

    .catalog-shell {
        display: block;
        width: calc(100% - 28px);
        max-width: calc(100% - 28px);
        padding-top: 18px;
    }

    .course-detail-shell {
        width: calc(100% - 28px);
        max-width: calc(100% - 28px);
        margin-top: 20px;
    }

    .course-breadcrumb {
        gap: 6px;
        overflow: hidden;
        min-width: 0;
        font-size: 11px;
        letter-spacing: 0.02em;
        white-space: nowrap;
        scrollbar-width: none;
    }

    .course-breadcrumb::-webkit-scrollbar {
        display: none;
    }

    .course-breadcrumb a,
    .course-breadcrumb span {
        flex: 0 0 auto;
    }

    .course-breadcrumb button,
    .course-breadcrumb strong {
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .course-breadcrumb button {
        flex: 0 1 auto;
        max-width: 96px;
    }

    .course-breadcrumb strong {
        flex: 1 1 auto;
    }

    .course-overview-card h1 {
        font-size: 26px;
        line-height: 1.05;
    }

    .course-description {
        margin-top: 14px;
        font-size: 13px;
        line-height: 1.42;
    }

    .course-detail-layout {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .course-overview-card {
        min-height: 0;
        padding: 18px 16px;
    }

    .start-learning-button {
        height: 42px;
        margin-top: 18px;
        font-size: 13px;
    }

    .course-contents-head {
        align-items: start;
        display: grid;
        gap: 8px;
        padding: 12px 12px;
    }

    .course-contents-head h2 {
        font-size: 16px;
    }

    .course-contents-head > span {
        font-size: 11px;
    }

    .detail-section-toggle {
        grid-template-columns: minmax(0, 1fr) auto 14px;
        gap: 8px;
        min-height: 42px;
        padding: 0 12px;
    }

    .detail-section-toggle span:first-child {
        font-size: 12px;
    }

    .detail-section-toggle small {
        font-size: 10px;
    }

    .course-contents-actions {
        justify-content: flex-start;
    }

    .lesson-row {
        grid-template-columns: 18px minmax(0, 1fr) auto;
        gap: 8px;
        min-height: 42px;
        padding: 6px 10px 6px 18px;
    }

    .lesson-row-actions {
        grid-column: auto;
        justify-content: flex-end;
        flex-wrap: wrap;
        gap: 5px;
    }

    .lesson-row h3 {
        font-size: 12px;
        line-height: 1.18;
    }

    .lesson-icon {
        width: 18px;
        height: 18px;
        border-radius: 6px;
    }

    .lesson-icon svg {
        width: 11px;
        height: 11px;
    }

    .lesson-row-actions .pin-chip,
    .lesson-row-actions .open-tab-button {
        min-height: 26px;
        padding: 0 7px;
        font-size: 10px;
    }

    .is-course-player {
        overflow: hidden;
    }

    .course-player-shell {
        height: 100vh;
        height: 100dvh;
        overflow: hidden;
    }

    .course-player-layout {
        display: grid;
        grid-template-columns: minmax(116px, 29vw) minmax(0, 1fr);
        height: 100vh;
        height: 100dvh;
        min-height: 0;
        overflow: hidden;
    }

    .player-sidebar {
        display: flex;
        flex-direction: column;
        gap: 7px;
        height: 100vh;
        height: 100dvh;
        min-height: 0;
        max-height: none;
        overflow-y: auto;
        overflow-x: hidden;
        padding: 9px 6px;
        border-right: 1px solid #dbe5ef;
        border-bottom: 0;
        background: linear-gradient(180deg, #ffffff 0%, #fff8f1 100%);
        box-shadow: inset -1px 0 0 rgba(23, 32, 51, 0.04);
    }

    .player-course-title {
        grid-template-columns: 20px minmax(0, 1fr);
        min-height: 26px;
        padding: 0;
    }

    .player-course-title strong {
        font-size: 10px;
        line-height: 1.12;
        white-space: normal;
    }

    .player-course-mark {
        width: 20px;
        height: 20px;
    }

    .player-search-row {
        grid-template-columns: 1fr;
        gap: 7px;
    }

    .player-search input {
        height: 28px;
        padding: 0 8px;
        border-radius: 8px;
        font-size: 10px;
        box-shadow: none;
    }

    .player-pinned-button {
        justify-self: stretch;
        min-height: 28px;
        padding: 0 6px;
        font-size: 10px;
    }

    .player-sections {
        gap: 6px;
        margin-top: 0;
    }

    .player-section-title {
        min-height: 27px;
        padding: 5px 6px;
        border-radius: 8px;
        font-size: 10px;
        font-weight: 740;
    }

    .player-lesson-nav {
        max-height: none;
        margin-left: 0;
        padding: 4px 0 4px 7px;
        border-left-color: #eadfd4;
    }

    .player-lesson-link {
        min-height: 25px;
        padding: 5px 6px;
        border-radius: 8px;
        font-size: 9.5px;
        font-weight: 560;
    }

    .player-main {
        display: flex;
        flex-direction: column;
        height: 100vh;
        height: 100dvh;
        min-height: 0;
        overflow: hidden;
    }

    .player-toolbar {
        grid-template-columns: auto minmax(40px, 1fr) minmax(0, auto);
        height: 42px;
        gap: 5px;
        padding: 5px 6px;
        overflow: hidden;
    }

    .player-toolbar h1 {
        order: 0;
        font-size: 10.5px;
        line-height: 1.15;
        text-align: left;
        white-space: nowrap;
    }

    .player-toolbar-actions {
        display: flex;
        justify-content: flex-end;
        gap: 4px;
        width: auto;
        min-width: 0;
        max-width: 100%;
        overflow-x: auto;
        padding-bottom: 2px;
        scrollbar-width: none;
    }

    .player-toolbar-actions::-webkit-scrollbar {
        display: none;
    }

    .player-back-link,
    .player-pill {
        width: auto;
        min-width: 0;
        min-height: 30px;
        height: 30px;
        padding: 0 8px;
        font-size: 9.5px;
        white-space: nowrap;
    }

    .player-back-link {
        justify-self: start;
    }

    .auth-page-shell,
    .info-page-shell {
        width: calc(100% - 28px);
        max-width: calc(100% - 28px);
    }

    .auth-page-shell,
    .info-page-shell {
        padding: 42px 0;
    }

    .auth-layout {
        grid-template-columns: 1fr;
    }

    .auth-form {
        padding: 22px;
    }

    .pinned-grid {
        grid-template-columns: 1fr;
    }

    .site-footer {
        margin-top: 52px;
    }

    .footer-inner {
        width: calc(100% - 28px);
        flex-direction: column;
        gap: 38px;
        padding: 64px 0;
    }

    .footer-nav-block {
        justify-items: start;
        min-width: 0;
        width: 100%;
    }

    .info-page-hero {
        padding: 28px 22px;
    }

    .info-document-section {
        padding: 24px 20px;
    }

    .footer-links {
        justify-content: flex-start;
        gap: 13px 18px;
    }

    .player-frame-shell {
        flex: 1 1 auto;
        height: auto;
        min-height: 0;
        margin: 8px;
        border-radius: 12px;
        overflow: hidden;
    }

    .lesson-frame {
        width: var(--lesson-frame-width, 900px);
        height: var(--lesson-frame-height, 1600px);
        max-width: none;
        transform: scale(var(--lesson-frame-scale, 1));
        transform-origin: top left;
    }

    .topics-panel {
        position: static;
        max-height: none;
        overflow: visible;
        padding: 0 0 18px;
        border-right: 0;
    }

    .topic-list {
        display: flex;
        gap: 8px;
        overflow-x: auto;
        padding-bottom: 4px;
    }

    .topic-button {
        flex: 0 0 auto;
        width: auto;
        min-height: 38px;
        gap: 10px;
        border: 1px solid var(--line);
        background: #ffffff;
    }

    .topic-button small {
        display: none;
    }

    .catalog-head {
        display: block;
    }

    .catalog-tools {
        justify-content: flex-start;
        min-width: 0;
        margin-top: 14px;
        flex-wrap: wrap;
    }

    .search-box--catalog {
        min-width: min(100%, 260px);
    }

    .catalog-stats {
        justify-content: flex-start;
        margin-top: 14px;
    }

    .course-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        align-items: start;
        gap: 10px;
        padding-top: 14px;
    }

    .course-card,
    .pinned-card {
        grid-template-rows: auto auto;
        min-height: 0;
        max-width: none;
        width: 100%;
        margin: 0;
        border-color: #dde4ee;
        border-radius: 12px;
        box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
        contain: layout paint style;
    }

    .course-card:hover,
    .course-card:focus-visible {
        transform: none;
        box-shadow: 0 2px 8px rgba(15, 23, 42, 0.07);
    }

    .card-media {
        aspect-ratio: 16 / 9;
        min-height: 0;
        background: #f8fafc;
    }

    .card-media img {
        object-fit: contain;
    }

    .card-media .thumbnail-frame {
        width: calc(100% / 0.62);
        height: calc(100% / 0.62);
        transform: scale(0.62);
        transform-origin: top left;
    }

    .card-media .thumbnail-title {
        font-size: clamp(13px, 6.8cqi, 24px) !important;
        line-height: 1.08 !important;
    }

    .card-media .thumbnail-badge {
        padding: 1.1cqi 2.2cqi !important;
        font-size: clamp(6px, 1.8cqi, 9px) !important;
    }

    .card-media .thumbnail-logo {
        width: min(20cqi, 78px) !important;
    }

    .card-body {
        gap: 7px;
        padding: 8px 8px 9px;
    }

    .course-card-footer {
        align-items: center;
        gap: 6px;
    }

    .course-title {
        font-size: 13px;
        line-height: 1.14;
        font-weight: 680;
    }

    .course-meta {
        gap: 4px;
        color: #9aa5b5;
        font-size: 8.5px;
        font-weight: 620;
    }

    .course-meta span + span::before {
        width: 3px;
        height: 3px;
        margin: 0 5px 1px 0;
    }

    .tag-list {
        gap: 4px;
    }

    .tag {
        min-height: 18px;
        padding: 0 6px;
        border-color: #cbd5e1;
        color: #334155;
        font-size: 8.5px;
        font-weight: 620;
    }

    .course-pin-icon {
        width: 26px;
        height: 26px;
        border-color: #e1e7f0;
        border-radius: 8px;
    }

    .course-pin-icon svg {
        width: 13px;
        height: 13px;
    }

    .pager {
        justify-content: flex-start;
        gap: 5px;
        padding: 18px 2px 0;
    }

    .pager button {
        min-width: 34px;
        height: 34px;
        padding: 0 8px;
        font-size: 13px;
        flex: 0 0 auto;
    }

    .pager button[data-page="prev"],
    .pager button[data-page="next"],
    .pager button[data-page="last"] {
        min-width: 54px;
    }

    .carousel-heading {
        display: grid;
        gap: 12px;
        justify-items: center;
        align-items: center;
        text-align: center;
    }

    .demo-carousel-block,
    .demo-carousel-block[data-align],
    .demo-carousel-block[data-align="stretch"] {
        width: min(560px, calc(100vw - 28px)) !important;
        max-width: min(560px, calc(100vw - 28px)) !important;
        margin-right: auto !important;
        margin-left: auto !important;
        padding-top: 10px;
        contain-intrinsic-size: 620px;
    }

    .carousel-text-block {
        width: 100%;
        max-width: 320px;
        margin-right: auto;
        margin-left: auto;
        font-size: 26px;
        line-height: 1.1;
        text-align: center;
        text-wrap: balance;
        overflow-wrap: break-word;
    }

    .carousel-heading > div {
        text-align: center;
    }

    .carousel-heading h3 {
        font-size: 22px;
    }

    .carousel-controls {
        justify-content: center;
    }



    .carousel-button {
        width: 38px;
        height: 38px;
    }

    .carousel-button--sm {
        width: 26px;
        height: 26px;
    }

    .demo-feature-card.is-secondary {
        display: grid;
    }

    .demo-feature-card {
        display: grid;
        grid-template-rows: auto auto;
        flex-basis: 100% !important;
        min-height: 0;
        background: #ffffff;
    }

    .demo-feature-card::after {
        display: none;
    }

    .demo-card-media-shell {
        position: relative;
        inset: auto;
        aspect-ratio: 16 / 10;
        width: 100%;
        height: auto;
        min-height: 0;
    }

    .demo-feature-card iframe,
    .demo-feature-card .carousel-card-image,
    .demo-feature-card .carousel-html-media,
    .demo-feature-card .carousel-icon-media {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        object-fit: contain;
    }

    .demo-feature-card .carousel-html-frame {
        width: 100%;
        height: 100%;
        transform: none;
        transform-origin: center center;
    }

    .demo-feature-card .carousel-html-media {
        overflow: hidden;
    }

    .demo-card-meta {
        position: relative;
        inset: auto;
        z-index: 2;
        display: grid;
        gap: 10px;
        padding: 12px 14px 14px;
        background: #ffffff;
        color: #172033;
        text-align: left;
        transform: none !important;
    }

    .demo-feature-card[data-text-position="top"] .demo-card-meta,
    .demo-feature-card[data-text-position="center"] .demo-card-meta {
        top: auto;
        bottom: auto;
        align-items: start;
        transform: none;
    }

    .demo-card-meta h4 {
        color: #172033;
        font-size: 19px;
        line-height: 1.15;
    }

    .demo-card-meta span {
        color: #667085;
        font-size: 12px;
    }

    .demo-card-meta a {
        margin-top: 0;
    }

    .demo-card-meta button {
        justify-self: start;
        min-height: 34px;
        border: 1px solid #dfe5ef;
        background: #f8fafc;
        color: #172033;
    }

    .featured-demo-rail,
    .compact-demo-rail {
        width: 100%;
        min-width: 0;
        gap: 14px;
        justify-content: flex-start !important;
        scroll-snap-type: x mandatory;
    }

    .featured-demo-rail .demo-feature-card,
    .compact-demo-rail .compact-demo-card {
        flex: 0 0 100% !important;
        width: 100% !important;
        max-width: 100%;
        scroll-snap-align: center;
    }

    .compact-demo-card {
        min-height: 0;
        aspect-ratio: 16 / 10;
        padding: 14px;
    }

    .compact-card-media iframe,
    .compact-card-media img,
    .compact-card-media .carousel-html-media {
        object-fit: contain;
    }

    .compact-demo-card b {
        font-size: 18px;
        line-height: 1.15;
    }

    .compact-demo-card span {
        font-size: 12px;
    }

    .pinned-button,
    .open-tab-button,
    .pin-chip {
        min-height: 34px;
        gap: 6px;
        font-size: 12px;
    }

    .pinned-button {
        padding: 0 7px 0 10px;
    }

    .pinned-button svg {
        width: 13px;
        height: 13px;
    }

    .pinned-button [data-pinned-count] {
        min-width: 20px;
        height: 20px;
        font-size: 10px;
    }

    .search-box {
        height: 40px;
        font-size: 14px;
    }

    .catalog-title {
        font-size: 30px;
    }

    .catalog-stats {
        margin-top: 12px;
    }

    .catalog-stats span {
        min-height: 34px;
        padding: 0 11px;
        font-size: 12px;
    }

    .topic-button {
        min-height: 34px;
        gap: 8px;
        font-size: 14px;
    }

    .course-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        align-items: start;
        gap: 9px;
        padding-top: 14px;
    }

    .course-card,
    .pinned-card {
        grid-template-rows: auto auto;
        max-width: none;
    }

    .card-body {
        gap: 7px;
        padding: 8px;
    }

    .course-title {
        font-size: 12.5px;
        line-height: 1.14;
        font-weight: 680;
    }

    .course-meta {
        gap: 4px;
        color: #9aa5b5;
        font-size: 8.5px;
        font-weight: 620;
    }

    .tag {
        min-height: 17px;
        padding: 0 6px;
        border-color: #cbd5e1;
        font-size: 8px;
        font-weight: 620;
    }

    .course-pin-icon {
        width: 25px;
        height: 25px;
    }

    .course-pin-icon svg {
        width: 12px;
        height: 12px;
    }

    .course-label {
        top: 12px;
        left: 12px;
        padding: 3px 6px;
        font-size: 9px;
    }

    .course-player-layout {
        grid-template-columns: minmax(108px, 28vw) minmax(0, 1fr);
        height: 100vh;
        height: 100dvh;
    }

    .player-sidebar {
        gap: 6px;
        height: 100vh;
        height: 100dvh;
        max-height: none;
        padding: 8px 5px;
    }

    .player-course-title {
        grid-template-columns: 18px minmax(0, 1fr);
        min-height: 24px;
    }

    .player-course-title strong {
        font-size: 9px;
        line-height: 1.12;
    }

    .player-course-mark {
        width: 18px;
        height: 18px;
    }

    .player-search input {
        height: 26px;
        font-size: 9px;
    }

    .player-pinned-button {
        min-height: 26px;
        font-size: 9px;
    }

    .player-section-title {
        min-height: 25px;
        padding: 4px 5px;
        font-size: 9px;
    }

    .player-lesson-nav {
        max-height: none;
    }

    .player-lesson-link {
        min-height: 23px;
        padding: 4px 5px;
        font-size: 8.5px;
    }

    .player-toolbar {
        gap: 4px;
        height: 38px;
        padding: 4px 5px;
    }

    .player-toolbar h1 {
        font-size: 9px;
    }

    .player-back-link,
    .player-pill {
        min-height: 28px;
        height: 28px;
        padding: 0 7px;
        font-size: 8.5px;
    }

    .player-frame-shell {
        flex: 1 1 auto;
        height: auto;
        min-height: 0;
        margin: 7px;
    }

    .demo-carousel-block,
    .demo-carousel-block[data-align],
    .demo-carousel-block[data-align="stretch"] {
        width: min(460px, calc(100vw - 40px)) !important;
        max-width: min(460px, calc(100vw - 40px)) !important;
    }

    .carousel-text-block {
        max-width: 292px;
        font-size: 22px;
    }

    .carousel-heading h3 {
        font-size: 18px;
    }

    .carousel-button {
        width: 34px;
        height: 34px;
    }

    .demo-card-media-shell {
        aspect-ratio: 16 / 9;
    }

    .demo-card-meta {
        gap: 8px;
        padding: 10px 12px 12px;
    }

    .demo-card-meta h4 {
        font-size: 16px;
    }

    .demo-card-meta span {
        font-size: 11px;
    }

    .demo-card-meta button {
        min-height: 30px;
        padding: 0 11px;
        font-size: 12px;
    }

    .compact-demo-card {
        aspect-ratio: 16 / 9;
        padding: 12px;
    }

    .compact-demo-card b {
        font-size: 15px;
    }

    .compact-demo-card span {
        font-size: 11px;
    }
}

@media (max-height: 760px) and (min-width: 821px) {
    .hero-section {
        min-height: 0;
        padding: 26px 0 18px;
    }

    .hero-title {
        font-size: clamp(56px, 6.2vw, 86px);
    }

    .hero-heading {
        font-size: clamp(28px, 3.5vw, 44px);
    }

    .hero-subheading {
        margin-top: 18px;
        font-size: 19px;
    }

    .hero-actions {
        margin-top: 22px;
    }

    .lab-window {
        max-width: 600px;
    }

    .lab-screen {
        min-height: 200px;
    }
}

@media (max-width: 520px) {
    .topbar {
        padding: 14px;
        gap: 10px 12px;
    }

    .top-actions {
        order: 4;
        width: 100%;
        margin-left: 0;
        display: flex;
        justify-content: flex-start;
        gap: 8px;
    }

    .signin-button,
    .signup-button {
        height: 36px;
        padding: 0 10px;
        font-size: 12px;
    }

    .brand-name {
        font-size: 14px;
    }

    .brand {
        min-height: 34px;
        gap: 7px;
        padding: 4px 10px 4px 5px;
    }

    .brand-mark-wrap {
        width: 26px;
        height: 26px;
    }

    .brand-mark {
        transform: scale(1.48);
    }

    .hero-title {
        font-size: 46px;
    }

    .search-box {
        min-width: 0;
    }

    .catalog-title {
        font-size: 32px;
    }

    .course-title {
        display: -webkit-box;
        overflow: hidden;
        font-size: 12.5px;
        line-height: 1.14;
        font-weight: 680;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
    }

    .card-body {
        gap: 7px;
        padding: 8px;
    }

    .course-meta {
        gap: 4px;
        color: #9aa5b5;
        font-size: 8.5px;
        font-weight: 620;
    }

    .course-meta span + span::before {
        width: 3px;
        height: 3px;
        margin: 0 5px 1px 0;
    }

    .course-card-footer {
        gap: 5px;
    }

    .tag {
        min-height: 17px;
        padding: 0 6px;
        border-color: #cbd5e1;
        font-size: 8px;
        font-weight: 620;
    }

    .course-pin-icon {
        width: 25px;
        height: 25px;
        border-radius: 7px;
    }

    .course-pin-icon svg {
        width: 12px;
        height: 12px;
    }

    .demo-feature-card {
        min-height: 0;
    }
}

@media (max-width: 820px) {
    body.is-course-player {
        overflow: hidden !important;
        background: #ffffff;
    }

    .course-player-shell {
        width: 100vw !important;
        height: 100vh !important;
        height: 100dvh !important;
        margin: 0 !important;
        overflow: hidden !important;
        --mobile-player-width: 945px;
        --mobile-player-height: 2200px;
        --mobile-player-scale: 1;
    }

    .course-player-layout {
        display: grid !important;
        grid-template-columns: 280px minmax(0, 1fr) !important;
        width: var(--mobile-player-width, 945px) !important;
        height: var(--mobile-player-height, 2200px) !important;
        min-height: 0 !important;
        overflow: hidden !important;
        transform: scale(var(--mobile-player-scale, 1)) !important;
        transform-origin: top left !important;
    }

    .player-sidebar {
        display: flex !important;
        flex-direction: column !important;
        gap: 20px !important;
        width: auto !important;
        height: var(--mobile-player-height, 2200px) !important;
        min-height: 0 !important;
        max-height: none !important;
        padding: 24px 16px !important;
        overflow-y: auto !important;
        overflow-x: hidden !important;
        border-right: 1px solid #dbe5ef !important;
        border-bottom: 0 !important;
        background: linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 247, 237, 0.98) 100%) !important;
        box-shadow: inset -1px 0 0 rgba(23, 32, 51, 0.04) !important;
    }

    .player-course-title {
        grid-template-columns: 30px minmax(0, 1fr) !important;
        min-height: 42px !important;
        padding: 2px 4px 6px !important;
    }

    .player-course-title strong {
        font-size: 17px !important;
        line-height: 1.2 !important;
        white-space: nowrap !important;
    }

    .player-course-mark {
        width: 30px !important;
        height: 30px !important;
    }

    .player-search-row {
        grid-template-columns: minmax(0, 1fr) auto !important;
        gap: 8px !important;
    }

    .player-search input {
        height: 44px !important;
        padding: 0 14px !important;
        border-radius: 10px !important;
        font-size: 16px !important;
    }

    .player-pinned-button {
        justify-self: auto !important;
        min-height: 44px !important;
        padding: 0 10px !important;
        font-size: 14px !important;
    }

    .player-sections {
        gap: 8px !important;
        margin-top: 4px !important;
    }

    .player-section-title {
        min-height: 32px !important;
        padding: 6px 7px !important;
        border-radius: 8px !important;
        font-size: 13px !important;
        line-height: 1.35 !important;
        font-weight: 560 !important;
    }

    .player-lesson-nav {
        max-height: none !important;
        margin-left: 10px !important;
        padding: 2px 3px 2px 9px !important;
    }

    .player-lesson-link {
        min-height: 32px !important;
        padding: 7px 8px !important;
        border-radius: 8px !important;
        font-size: 13px !important;
        line-height: 1.35 !important;
        font-weight: 460 !important;
    }

    .player-main {
        display: flex !important;
        flex-direction: column !important;
        height: var(--mobile-player-height, 2200px) !important;
        min-height: 0 !important;
        overflow: hidden !important;
    }

    .player-toolbar {
        grid-template-columns: 125px 78px minmax(0, auto) !important;
        height: 64px !important;
        gap: 8px !important;
        padding: 0 12px !important;
        overflow: hidden !important;
    }

    .player-toolbar h1 {
        order: 0 !important;
        font-size: 14px !important;
        line-height: 1.2 !important;
        text-align: center !important;
        white-space: nowrap !important;
    }

    .player-toolbar-actions {
        display: inline-flex !important;
        justify-content: flex-end !important;
        gap: 8px !important;
        width: auto !important;
        min-width: 0 !important;
        max-width: none !important;
        overflow: visible !important;
        padding-bottom: 0 !important;
    }

    .player-back-link {
        min-width: 125px !important;
    }

    .player-pill {
        min-width: 104px !important;
    }

    .player-back-link,
    .player-pill {
        min-height: 38px !important;
        height: 38px !important;
        padding: 0 10px !important;
        font-size: 12px !important;
        white-space: nowrap !important;
    }

    .player-frame-shell {
        flex: 1 1 auto !important;
        height: calc(var(--mobile-player-height, 2200px) - 80px) !important;
        min-height: 0 !important;
        margin: 0 16px 16px !important;
        border-radius: 16px !important;
        overflow: hidden !important;
    }

    .lesson-frame {
        width: 100% !important;
        height: 100% !important;
        max-width: 100% !important;
        transform: none !important;
    }

    .course-detail-shell {
        width: calc(100% - 18px) !important;
        max-width: calc(100% - 18px) !important;
        margin-top: 10px !important;
    }

    .course-breadcrumb {
        gap: 6px !important;
        overflow: hidden !important;
        min-width: 0 !important;
        font-size: 10px !important;
        line-height: 1.2 !important;
        letter-spacing: 0.01em !important;
        white-space: nowrap !important;
        scrollbar-width: none !important;
    }

    .course-breadcrumb::-webkit-scrollbar {
        display: none !important;
    }

    .course-breadcrumb a,
    .course-breadcrumb span {
        flex: 0 0 auto !important;
    }

    .course-breadcrumb button,
    .course-breadcrumb strong {
        min-width: 0 !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
    }

    .course-breadcrumb button {
        flex: 0 1 auto !important;
        max-width: 88px !important;
    }

    .course-breadcrumb strong {
        flex: 1 1 auto !important;
    }

    .course-overview-card {
        padding: 14px 12px !important;
    }

    .course-overview-card > .pin-chip,
    .lesson-row-actions .pin-chip {
        display: none !important;
    }

    .course-overview-card h1 {
        font-size: 24px !important;
        line-height: 1.05 !important;
    }

    .course-description {
        margin-top: 10px !important;
        font-size: 12px !important;
        line-height: 1.38 !important;
    }

    .course-contents-head {
        gap: 8px !important;
        padding: 10px 12px !important;
    }

    .course-contents-head h2 {
        font-size: 15px !important;
    }

    .course-contents-head > span {
        font-size: 10px !important;
    }

    .detail-section-toggle {
        min-height: 38px !important;
        padding: 0 10px !important;
    }

    .detail-section-toggle span:first-child {
        font-size: 11px !important;
    }

    .detail-section-toggle small {
        font-size: 9px !important;
    }

    .lesson-row {
        grid-template-columns: 16px minmax(0, 1fr) auto !important;
        min-height: 38px !important;
        gap: 7px !important;
        padding: 5px 8px 5px 16px !important;
    }

    .lesson-row h3 {
        font-size: 11px !important;
        line-height: 1.15 !important;
    }

    .lesson-row-actions .pin-chip,
    .lesson-row-actions .open-tab-button {
        min-height: 24px !important;
        padding: 0 6px !important;
        font-size: 9px !important;
    }

    .lesson-icon {
        width: 16px !important;
        height: 16px !important;
        border-radius: 5px !important;
    }

    .lesson-icon svg {
        width: 10px !important;
        height: 10px !important;
    }
}

/* Final image-thumbnail safety override: never crop uploaded carousel artwork. */
.hero-card-media > img,
.hero-card-media .carousel-card-image,
.demo-feature-card .carousel-card-image,
.compact-card-media img {
    width: 100% !important;
    height: 100% !important;
    object-fit: contain !important;
    object-position: center center !important;
    transform: none !important;
}

.hero-carousel-card:has(.carousel-card-image) {
    aspect-ratio: 1862 / 845 !important;
    min-height: 0 !important;
}

.demo-feature-card:has(.carousel-card-image) .demo-card-media-shell {
    position: absolute !important;
    inset: 0 !important;
    width: 100% !important;
    height: 100% !important;
}

/* Mobile carousel hardening: configured desktop dimensions become a scaled aspect ratio. */
@media (max-width: 820px) {
    .demo-carousel-stack {
        gap: 10px;
    }

    .demo-carousel-block,
    .demo-carousel-block[data-align],
    .demo-carousel-block[data-align="stretch"] {
        width: min(560px, calc(100vw - 28px)) !important;
        max-width: min(560px, calc(100vw - 28px)) !important;
        margin-right: auto !important;
        margin-left: auto !important;
        padding-top: 8px !important;
        padding-bottom: 28px !important;
    }

    .carousel-viewport {
        width: 100%;
        max-width: 100%;
        overflow-x: auto;
        overflow-y: hidden;
        scroll-snap-type: x mandatory;
        scroll-padding-inline: 0;
    }

    .featured-demo-rail,
    .compact-demo-rail {
        width: max-content !important;
        min-width: 100% !important;
        gap: 10px !important;
        align-items: stretch;
        padding-right: 0 !important;
    }

    .featured-demo-rail .demo-feature-card,
    .compact-demo-rail .compact-demo-card {
        flex: 0 0 min(100%, calc(100vw - 28px)) !important;
        width: min(100%, calc(100vw - 28px)) !important;
        max-width: min(100%, calc(100vw - 28px)) !important;
        scroll-snap-align: start;
    }

    .demo-feature-card,
    .demo-feature-card[data-content-type="image"][data-frame-style="flush"] {
        display: block !important;
        height: auto !important;
        max-height: 300px;
        min-height: 0 !important;
        aspect-ratio: var(--card-aspect-ratio, 16 / 9);
        background: transparent;
    }

    .demo-feature-card .demo-card-media-shell,
    .demo-feature-card:has(.carousel-card-image) .demo-card-media-shell,
    .demo-feature-card[data-content-type="image"][data-frame-style="flush"] .demo-card-media-shell {
        position: absolute !important;
        inset: 0 !important;
        width: 100% !important;
        height: 100% !important;
        min-height: 0 !important;
        aspect-ratio: auto !important;
        overflow: hidden !important;
    }

    .demo-feature-card iframe,
    .demo-feature-card .carousel-card-image,
    .demo-feature-card .carousel-html-media,
    .demo-feature-card .carousel-icon-media,
    .compact-demo-card iframe,
    .compact-demo-card img,
    .compact-demo-card .carousel-html-media {
        position: absolute !important;
        inset: 0 !important;
        width: 100% !important;
        height: 100% !important;
        max-width: none !important;
        max-height: none !important;
        object-fit: contain !important;
        object-position: center center !important;
        transform: none !important;
    }

    .compact-demo-card {
        height: auto !important;
        max-height: 220px;
        min-height: 0 !important;
        aspect-ratio: var(--card-aspect-ratio, 11 / 8);
        padding: 12px;
    }

    .compact-card-media {
        position: absolute !important;
        inset: 0 !important;
        width: 100% !important;
        height: 100% !important;
        overflow: hidden !important;
    }

    .compact-card-copy {
        max-width: 86%;
        overflow-wrap: anywhere;
    }

    .compact-demo-card b {
        display: block;
        font-size: clamp(13px, 4.2vw, 16px) !important;
        line-height: 1.14 !important;
        overflow-wrap: anywhere;
    }

    .compact-demo-card span {
        display: block;
        margin-top: 5px;
        font-size: clamp(10px, 3.2vw, 12px) !important;
        line-height: 1.25;
        overflow-wrap: anywhere;
    }
}

@media (max-width: 520px) {
    .hero-section {
        width: calc(100% - 24px);
        max-width: calc(100% - 24px);
        padding-top: 20px;
        padding-bottom: 14px;
    }

    .main-nav {
        gap: 1px;
    }

    .main-nav a,
    .main-nav button {
        min-height: 32px;
        padding: 0 9px;
        font-size: 12px;
    }

    .hero-title {
        font-size: clamp(34px, 11.2vw, 42px) !important;
        line-height: 1 !important;
    }

    .hero-heading {
        max-width: 340px;
        margin-top: 12px;
        font-size: clamp(21px, 6.4vw, 27px) !important;
        line-height: 1.14;
    }

    .hero-subheading {
        max-width: 340px;
        margin-top: 14px;
        padding-left: 12px;
        border-left-width: 3px;
        font-size: 14.5px !important;
        line-height: 1.45 !important;
    }

    .hero-actions {
        grid-template-columns: 1fr;
        max-width: 240px;
        gap: 8px;
    }

    .primary-action,
    .secondary-action {
        min-height: 40px;
        font-size: 13.5px;
    }

    .demo-carousel-block,
    .demo-carousel-block[data-align],
    .demo-carousel-block[data-align="stretch"] {
        width: calc(100vw - 24px) !important;
        max-width: calc(100vw - 24px) !important;
        padding-bottom: 24px !important;
    }

    .featured-demo-rail .demo-feature-card,
    .compact-demo-rail .compact-demo-card {
        flex-basis: calc(100vw - 24px) !important;
        width: calc(100vw - 24px) !important;
        max-width: calc(100vw - 24px) !important;
    }

    .demo-feature-card,
    .demo-feature-card[data-content-type="image"][data-frame-style="flush"] {
        max-height: 280px;
    }

    .compact-demo-card {
        max-height: 190px;
    }
}

/* Final About-page guard: keep the rewritten About page white on every viewport. */
body.is-about-page,
body.is-about-page .info-page-shell,
body.is-about-page .about-standard {
    background: #ffffff !important;
    color: #172033;
}

body.is-about-page .info-page-shell {
    width: min(1180px, calc(100% - 48px)) !important;
    max-width: 1180px !important;
    margin-right: auto !important;
    margin-left: auto !important;
    padding: clamp(44px, 7vw, 86px) 0 72px !important;
}

@media (max-width: 520px) {
    body.is-about-page .info-page-shell {
        width: calc(100% - 28px) !important;
        padding: 34px 0 56px !important;
    }
}