:root {
    --page: #f8fbff;
    --page-strong: #eef5ff;
    --surface: #ffffff;
    --surface-soft: #f5f8fc;
    --surface-blue: #edf5ff;
    --line: #d9e3f1;
    --line-strong: #a9bbd3;
    --ink: #07162f;
    --ink-soft: #43516a;
    --muted: #72809a;
    --primary: #075eea;
    --primary-deep: #064bb7;
    --green: #0b9f72;
    --amber: #c66b10;
    --violet: #6736dc;
    --danger: #d84b42;
    --shadow: 0 18px 48px rgba(26, 55, 98, 0.13);
    --shadow-soft: 0 12px 28px rgba(26, 55, 98, 0.08);
    --radius: 8px;
    --font-heading: "Space Grotesk", "Noto Sans SC", "PingFang SC", sans-serif;
    --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body.home-page {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    font-family: var(--font-body);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(248, 251, 255, 0.94)),
        var(--page);
    overflow-x: hidden;
}

.page-grid-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(91, 128, 177, 0.11) 1px, transparent 1px),
        linear-gradient(90deg, rgba(91, 128, 177, 0.11) 1px, transparent 1px);
    background-size: 32px 32px;
    mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.72) 56%, transparent 100%);
}

a {
    color: inherit;
}

svg {
    display: block;
}

.app-topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: grid;
    grid-template-columns: minmax(190px, 1fr) auto minmax(250px, 1fr);
    align-items: center;
    gap: 1.5rem;
    min-height: 66px;
    padding: 0 2rem;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(18px);
}

.brand,
.topnav,
.top-search,
.button,
.quick-tile,
.section-link {
    -webkit-tap-highlight-color: transparent;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    width: fit-content;
    min-width: 0;
    color: var(--ink);
    text-decoration: none;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    color: var(--primary);
}

.brand-mark svg {
    width: 36px;
    height: 36px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.brand-name {
    font-family: var(--font-heading);
    font-size: 1.68rem;
    font-weight: 700;
    line-height: 1;
}

.topnav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
}

.topnav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    min-height: 40px;
    padding: 0 0.72rem;
    border: 1px solid transparent;
    border-radius: var(--radius);
    color: var(--ink);
    font-weight: 800;
    font-size: 0.94rem;
    text-decoration: none;
    transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease, box-shadow 0.16s ease;
}

.nav-icon {
    display: grid;
    place-items: center;
    width: 25px;
    height: 25px;
    border: 1px solid var(--line);
    border-radius: 7px;
    color: var(--primary);
    background: #f6faff;
    transition: border-color 0.16s ease, background-color 0.16s ease, color 0.16s ease;
}

.nav-icon svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.topnav-link:hover,
.topnav-link:focus-visible,
.topnav-link.is-active {
    color: var(--primary);
    border-color: rgba(7, 94, 234, 0.18);
    background: rgba(237, 245, 255, 0.82);
}

.topnav-link:hover .nav-icon,
.topnav-link:focus-visible .nav-icon,
.topnav-link.is-active .nav-icon {
    color: #fff;
    border-color: var(--primary);
    background: var(--primary);
}

.top-search {
    justify-self: end;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 0.65rem;
    width: min(100%, 430px);
    min-height: 42px;
    padding: 0 0.72rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: 0 4px 14px rgba(26, 55, 98, 0.05);
}

.top-search svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: var(--muted);
    stroke-width: 2;
    stroke-linecap: round;
}

.top-search input {
    width: 100%;
    min-width: 0;
    border: 0;
    outline: 0;
    color: var(--ink);
    background: transparent;
    font: 600 0.92rem/1.2 var(--font-body);
}

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

.top-search:focus-within {
    border-color: rgba(7, 94, 234, 0.58);
    box-shadow: 0 0 0 3px rgba(7, 94, 234, 0.11);
}

.top-search kbd {
    padding: 0.13rem 0.4rem;
    border: 1px solid var(--line);
    border-bottom-color: var(--line-strong);
    border-radius: 6px;
    color: var(--muted);
    background: #fbfdff;
    font: 700 0.76rem/1.2 var(--font-mono);
}

.home-app {
    width: min(100%, 1440px);
    margin: 0 auto;
}

.hero-panel {
    display: grid;
    grid-template-columns: minmax(0, 0.72fr) minmax(560px, 1.08fr);
    gap: clamp(1.6rem, 3.8vw, 3.8rem);
    align-items: center;
    padding: clamp(2rem, 3.5vw, 3.4rem) 2rem 1.75rem;
}

.hero-copy {
    position: relative;
    padding: 1.2rem 0;
}

.hero-copy h1 {
    margin: 0;
    max-width: 9.4em;
    color: var(--ink);
    font-family: var(--font-heading);
    font-size: clamp(2.45rem, 4.35vw, 4.15rem);
    font-weight: 700;
    line-height: 1.07;
    letter-spacing: 0;
}

.hero-copy p {
    margin: 1.25rem 0 0;
    max-width: 32rem;
    color: var(--ink-soft);
    font-size: clamp(1.02rem, 1.35vw, 1.25rem);
    font-weight: 500;
    line-height: 1.72;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-top: 1.6rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    min-height: 52px;
    padding: 0 1.55rem;
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-weight: 800;
    font-size: 1.02rem;
    line-height: 1;
    text-decoration: none;
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.button svg,
.section-link svg {
    width: 19px;
    height: 19px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2.2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.button:hover,
.quick-tile:hover,
.section-link:hover {
    transform: translateY(-2px);
}

.button:focus-visible,
.quick-tile:focus-visible,
.section-link:focus-visible,
.topnav-link:focus-visible {
    outline: 3px solid rgba(7, 94, 234, 0.22);
    outline-offset: 3px;
}

.button-primary {
    color: #fff;
    background: linear-gradient(180deg, #0a6bf4 0%, var(--primary) 100%);
    box-shadow: 0 16px 28px rgba(7, 94, 234, 0.24);
}

.button-primary:hover {
    box-shadow: 0 20px 36px rgba(7, 94, 234, 0.3);
}

.button-secondary {
    color: var(--amber);
    border-color: rgba(198, 107, 16, 0.6);
    background: rgba(255, 255, 255, 0.78);
}

.button-secondary:hover {
    background: #fff8ef;
}

.hero-inline-code {
    display: grid;
    gap: 0.16rem;
    width: min(100%, 330px);
    margin-top: 1.65rem;
    padding-left: 1.35rem;
    border-left: 3px solid rgba(7, 94, 234, 0.18);
    color: #8aa7d2;
    font-family: var(--font-mono);
    font-size: clamp(1rem, 1.5vw, 1.28rem);
    font-weight: 700;
    line-height: 1.72;
}

.mini-code-line {
    display: block;
    color: #8aa7d2;
    white-space: nowrap;
}

.mini-code-line.is-indent {
    padding-left: 2.15rem;
}

.mini-code-line.is-comment {
    color: #9bb0cc;
}

.workbench-preview {
    overflow: hidden;
    border: 1px solid #c7d5e8;
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.workbench-titlebar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 54px;
    padding: 0 1rem;
    border-bottom: 1px solid var(--line);
    color: var(--ink-soft);
    font-size: 0.88rem;
}

.project-path,
.workbench-actions {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    min-width: 0;
}

.project-path strong {
    color: var(--ink);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    white-space: nowrap;
}

.window-square {
    width: 13px;
    height: 13px;
    border: 2px solid #6b7890;
    border-radius: 2px;
}

.save-state {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--ink-soft);
    font-weight: 700;
    white-space: nowrap;
}

.save-state i {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: var(--green);
}

.workbench-actions a {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 0 0.8rem;
    border: 1px solid var(--line);
    border-radius: 6px;
    color: var(--ink);
    background: #fff;
    font-weight: 800;
    text-decoration: none;
}

.workbench-actions .run-action {
    color: #fff;
    border-color: var(--primary);
    background: var(--primary);
}

.workbench-body {
    display: grid;
    grid-template-columns: 48px 170px minmax(0, 1fr);
    min-height: 270px;
}

.workspace-rail {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.05rem;
    padding-top: 1.05rem;
    border-right: 1px solid var(--line);
    background: #fbfdff;
}

.rail-dot {
    width: 18px;
    height: 18px;
    border: 2px solid #61718b;
    border-radius: 5px;
}

.rail-dot.is-active {
    border-color: var(--primary);
    background: var(--primary);
    box-shadow: 0 0 0 4px rgba(7, 94, 234, 0.1);
}

.file-list {
    min-width: 0;
    padding: 0.85rem;
    border-right: 1px solid var(--line);
    background: var(--surface-soft);
}

.file-title,
.folder-row,
.file-row {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-title {
    color: var(--ink-soft);
    font-weight: 800;
    font-size: 0.86rem;
    margin-bottom: 0.7rem;
}

.folder-row,
.file-row {
    min-height: 30px;
    display: flex;
    align-items: center;
    padding: 0 0.55rem;
    border-radius: 6px;
    color: var(--ink-soft);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.folder-row {
    color: var(--ink);
    font-weight: 700;
}

.folder-row::before {
    content: "⌄";
    margin-right: 0.35rem;
    color: var(--muted);
}

.file-row::before {
    content: "◦";
    margin-right: 0.45rem;
    color: var(--muted);
}

.file-row.is-active {
    color: var(--ink);
    background: #e6edf7;
    font-weight: 800;
}

.editor-pane {
    min-width: 0;
    background: #fff;
}

.editor-tab {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    padding: 0 1.05rem;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    color: var(--ink);
    font-family: var(--font-mono);
    font-size: 0.88rem;
    font-weight: 800;
}

.code-lines {
    margin: 0;
    padding: 0.78rem 1rem 0.85rem 3.6rem;
    color: #1f2e46;
    font-family: var(--font-mono);
    font-size: 0.86rem;
    line-height: 1.52;
    counter-reset: code;
}

.code-lines li {
    min-height: 1.52em;
    padding-left: 0.5rem;
    white-space: nowrap;
}

.code-lines li.indent-1 {
    padding-left: 2.35rem;
}

.code-lines li.indent-2 {
    padding-left: 4.25rem;
}

.code-lines li::marker {
    color: #8a9bb8;
    font-size: 0.82rem;
}

.code-keyword {
    color: var(--primary);
    font-weight: 800;
}

.code-comment {
    color: var(--green);
}

.code-string {
    color: var(--danger);
}

.output-panel {
    border-top: 1px solid var(--line);
    background: #fbfdff;
}

.output-tabs {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    min-height: 40px;
    padding: 0 1.1rem;
    border-bottom: 1px solid var(--line);
}

.output-tabs strong {
    color: var(--primary);
}

.output-tabs span,
.output-tabs em {
    color: var(--muted);
    font-style: normal;
    font-weight: 700;
    font-size: 0.84rem;
}

.output-tabs em {
    margin-left: auto;
}

.output-panel pre {
    margin: 0;
    padding: 0.85rem 1.25rem 1.05rem;
    color: #142139;
    font-family: var(--font-mono);
    font-size: 0.88rem;
    line-height: 1.55;
    white-space: pre-wrap;
}

.quick-dock {
    display: grid;
    grid-template-columns: 128px repeat(5, minmax(0, 1fr));
    gap: 0.85rem;
    align-items: stretch;
    padding: 1rem 2rem;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.78);
}

.quick-dock h2 {
    align-self: center;
    margin: 0;
    font-family: var(--font-heading);
    font-size: 1.12rem;
    line-height: 1.2;
}

.quick-tile {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.9rem;
    align-items: center;
    min-width: 0;
    min-height: 76px;
    padding: 0.8rem 1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    text-decoration: none;
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.quick-tile.is-active,
.quick-tile:hover {
    border-color: rgba(7, 94, 234, 0.78);
    box-shadow: 0 12px 26px rgba(7, 94, 234, 0.11);
}

.quick-icon {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
}

.quick-icon svg {
    width: 32px;
    height: 32px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2.2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.quick-icon-blue {
    color: var(--primary);
}

.quick-icon-green {
    color: var(--green);
}

.quick-icon-violet {
    color: var(--violet);
}

.quick-icon-amber {
    color: var(--amber);
}

.quick-icon-slate {
    color: var(--ink-soft);
}

.quick-tile strong,
.quick-tile small {
    display: block;
    min-width: 0;
    overflow-wrap: anywhere;
}

.quick-tile strong {
    color: var(--ink);
    font-size: 1rem;
    line-height: 1.25;
}

.quick-tile small {
    margin-top: 0.24rem;
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 700;
    line-height: 1.35;
}

.learning-section {
    padding: 1.55rem 2rem 4rem;
}

.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.section-head h2 {
    margin: 0;
    font-family: var(--font-heading);
    font-size: clamp(1.35rem, 2vw, 1.82rem);
    line-height: 1.15;
}

.section-head p {
    margin: 0.42rem 0 0;
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 700;
}

.section-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    min-height: 40px;
    padding: 0 0.8rem;
    border-radius: var(--radius);
    color: var(--primary);
    font-weight: 800;
    text-decoration: none;
    transition: transform 0.18s ease, background-color 0.18s ease;
}

.section-link:hover {
    background: rgba(7, 94, 234, 0.08);
}

.learning-board {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.learning-column {
    min-width: 0;
    border-right: 1px solid var(--line);
}

.learning-column:last-child {
    border-right: 0;
}

.column-head {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 0.7rem;
    align-items: center;
    min-height: 64px;
    padding: 0 0.95rem;
    border-bottom: 1px solid var(--line);
    background: linear-gradient(180deg, #fbfdff 0%, #f4f8fd 100%);
}

.column-index {
    color: var(--primary);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 800;
}

.column-title {
    min-width: 0;
}

.column-title h3 {
    min-width: 0;
    margin: 0;
    overflow: hidden;
    color: var(--ink);
    font-size: 0.98rem;
    font-weight: 800;
    line-height: 1.3;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.column-title span {
    display: block;
    margin-top: 0.22rem;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 800;
    line-height: 1.25;
}

.column-open {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border: 1px solid var(--line);
    border-radius: 7px;
    color: var(--primary);
    background: #fff;
    text-decoration: none;
    transition: transform 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.column-open svg {
    width: 17px;
    height: 17px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2.3;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.column-open:hover {
    border-color: rgba(7, 94, 234, 0.45);
    background: var(--surface-blue);
}

.article-list {
    display: grid;
    gap: 0;
    margin: 0;
    padding: 0;
    list-style: none;
}

.article-item,
.branch-item {
    min-width: 0;
    border-bottom: 1px solid var(--line);
}

.article-item:last-child,
.branch-item:last-child {
    border-bottom: 0;
}

.article-item a {
    position: relative;
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 0.6rem;
    align-items: center;
    min-height: 42px;
    padding: 0.58rem 0.85rem;
    color: var(--ink-soft);
    font-weight: 700;
    font-size: 0.91rem;
    line-height: 1.35;
    text-decoration: none;
    transition: color 0.16s ease, background-color 0.16s ease;
}

.article-item a::before {
    content: "";
    width: 8px;
    height: 8px;
    border: 1.5px solid #9db0ca;
    border-radius: 999px;
    background: #fff;
}

.article-item a::after {
    content: "";
    width: 8px;
    height: 8px;
    border-top: 1.5px solid currentColor;
    border-right: 1.5px solid currentColor;
    transform: rotate(45deg);
    opacity: 0.55;
}

.article-item a:hover {
    color: var(--primary);
    background: var(--surface-blue);
}

.article-item a:hover::before {
    border-color: var(--primary);
    background: var(--primary);
}

.branch {
    margin: 0;
}

.branch summary {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.58rem;
    align-items: center;
    min-height: 42px;
    padding: 0.58rem 0.85rem;
    color: var(--ink);
    cursor: pointer;
    font-weight: 800;
    font-size: 0.91rem;
    list-style: none;
    user-select: none;
}

.branch summary::-webkit-details-marker {
    display: none;
}

.branch summary::before {
    content: "";
    width: 8px;
    height: 8px;
    border-top: 1.5px solid currentColor;
    border-right: 1.5px solid currentColor;
    transform: rotate(45deg);
    transition: transform 0.18s ease;
}

.branch[open] summary::before {
    transform: rotate(135deg);
}

.branch summary:hover {
    color: var(--primary);
    background: var(--surface-blue);
}

.nested-list {
    border-top: 1px solid var(--line);
    background: #fbfdff;
}

.nested-list .article-item a,
.nested-list .branch summary {
    padding-left: 1.25rem;
}

.empty-state,
.root-files {
    margin-top: 1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.empty-state p {
    margin: 0;
    padding: 1rem;
    color: var(--ink-soft);
    line-height: 1.7;
}

.empty-state code {
    padding: 0.12rem 0.35rem;
    border-radius: 5px;
    color: var(--primary);
    background: var(--surface-blue);
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.root-files {
    padding: 0;
}

.root-files h3 {
    margin: 0;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--line);
    font-size: 1rem;
}

.is-filter-empty[hidden],
[hidden] {
    display: none !important;
}

@media (max-width: 1180px) {
    .app-topbar {
        grid-template-columns: auto 1fr;
    }

    .topnav {
        order: 3;
        grid-column: 1 / -1;
        justify-content: flex-start;
        min-height: 44px;
        border-top: 1px solid var(--line);
    }

    .top-search {
        width: min(100%, 480px);
    }

    .hero-panel {
        grid-template-columns: 1fr;
        min-height: 0;
    }

    .workbench-preview {
        max-width: 900px;
    }

    .quick-dock {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .quick-dock h2 {
        grid-column: 1 / -1;
    }
}

@media (max-width: 760px) {
    .app-topbar {
        position: static;
        grid-template-columns: 1fr;
        gap: 0.85rem;
        padding: 1rem;
    }

    .brand-name {
        font-size: 1.42rem;
    }

    .topnav {
        order: initial;
        grid-column: auto;
        justify-content: flex-start;
        gap: 0.5rem;
        min-height: 0;
        padding-top: 0.85rem;
        overflow-x: auto;
        scrollbar-width: none;
    }

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

    .topnav-link {
        flex: 0 0 auto;
        justify-content: center;
        white-space: nowrap;
        padding: 0 0.4rem;
        font-size: 0.9rem;
    }

    .nav-icon {
        width: 24px;
        height: 24px;
    }

    .top-search {
        justify-self: stretch;
        width: 100%;
    }

    .top-search kbd {
        display: none;
    }

    .hero-panel {
        gap: 1.6rem;
        padding: 2rem 1rem 1.3rem;
    }

    .hero-copy {
        padding: 0;
    }

    .hero-copy h1 {
        font-size: clamp(2.35rem, 12vw, 3.4rem);
    }

    .hero-copy p {
        line-height: 1.72;
    }

    .hero-actions,
    .button {
        width: 100%;
    }

    .workbench-titlebar,
    .workbench-actions {
        align-items: flex-start;
        flex-direction: column;
    }

    .workbench-titlebar {
        min-height: 0;
        padding: 0.85rem;
    }

    .workbench-actions {
        width: 100%;
        gap: 0.5rem;
    }

    .workbench-actions a {
        justify-content: center;
        width: 100%;
    }

    .workbench-body {
        grid-template-columns: 40px minmax(0, 1fr);
    }

    .file-list {
        display: none;
    }

    .code-lines {
        padding-left: 3rem;
        font-size: 0.78rem;
    }

    .code-lines li.indent-1 {
        padding-left: 1.7rem;
    }

    .code-lines li.indent-2 {
        padding-left: 3rem;
    }

    .output-tabs {
        gap: 0.8rem;
        flex-wrap: wrap;
        padding: 0.65rem 0.85rem;
    }

    .output-tabs em {
        margin-left: 0;
    }

    .quick-dock,
    .learning-section {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .quick-dock {
        grid-template-columns: 1fr;
    }

    .section-head {
        align-items: flex-start;
        flex-direction: column;
    }

    .learning-board {
        grid-template-columns: 1fr;
    }

    .learning-column {
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .learning-column:last-child {
        border-bottom: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}