/* PyTorch-docs–inspired layout; PhosphoLink accent */
:root {
    --docs-bg: #f3f4f6;
    --docs-sidebar-bg: #ffffff;
    --docs-content-bg: #ffffff;
    --docs-text: #1a1a1a;
    --docs-text-muted: #6b7280;
    --docs-border: #e5e7eb;
    --docs-accent: #0d47a1;
    --docs-accent-soft: rgba(13, 71, 161, 0.08);
    --docs-sidebar-width: 280px;
    --docs-content-max: 48rem;
    --docs-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --docs-mono: "Roboto Mono", "SF Mono", Consolas, "Liberation Mono", monospace;
    /* 顶栏 sticky 高度留白（须 ≥ 实际 navbar 高度） */
    --docs-top-offset: 92px;
    --docs-scroll-pad: calc(var(--docs-top-offset) + 1rem);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--docs-scroll-pad);
}

html:has(body.docs-layout) {
    overflow-x: visible;
}

body.docs-layout {
    font-family: var(--docs-font);
    font-size: 15px;
    line-height: 1.65;
    color: var(--docs-text);
    background: var(--docs-bg);
    min-height: 100vh;
    overflow-x: visible;
}

/* 手册页沿用全站 .navbar；仅补充移动端章节目录按钮 */
.docs-mobile-bar {
    display: none;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.5rem 1rem;
    background: var(--docs-sidebar-bg);
    border-bottom: 1px solid var(--docs-border);
}

.docs-menu-btn {
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--docs-border);
    background: #fff;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--docs-accent);
}

/* Shell */
.docs-shell {
    max-width: 1400px;
    margin: 0 auto;
    min-height: calc(100vh - var(--docs-top-offset));
}

.docs-sidebar {
    overflow-y: auto;
    background: var(--docs-sidebar-bg);
    border-right: 1px solid var(--docs-border);
    padding: 1rem 0;
}

@media (min-width: 769px) {
    .docs-shell {
        padding-left: var(--docs-sidebar-width);
    }

    .docs-sidebar {
        position: fixed;
        top: var(--docs-top-offset);
        left: max(calc((100vw - 1400px) / 2), 0px);
        width: var(--docs-sidebar-width);
        height: calc(100vh - var(--docs-top-offset));
        max-height: calc(100vh - var(--docs-top-offset));
        z-index: 5;
    }
}

.docs-sidebar-inner {
    padding: 0 0.75rem 2rem;
}

.docs-sidebar-heading {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--docs-text-muted);
    padding: 0 0.75rem 0.5rem;
}

.docs-toc {
    list-style: none;
}

.docs-toc > li { margin-bottom: 0.15rem; }

.docs-toc a {
    display: block;
    padding: 0.35rem 0.75rem;
    font-size: 0.875rem;
    color: var(--docs-text);
    text-decoration: none;
    border-left: 3px solid transparent;
    border-radius: 0 4px 4px 0;
}

.docs-toc a:hover {
    background: var(--docs-accent-soft);
    color: var(--docs-accent);
}

.docs-toc a.active {
    color: var(--docs-accent);
    font-weight: 600;
    background: var(--docs-accent-soft);
    border-left-color: var(--docs-accent);
}

.docs-toc .docs-toc-sub {
    list-style: none;
    margin: 0.1rem 0 0.35rem;
}

.docs-toc .docs-toc-sub a {
    padding-left: 1.35rem;
    font-size: 0.8125rem;
    color: var(--docs-text-muted);
}

.docs-toc .docs-toc-sub a.active {
    color: var(--docs-accent);
}

.docs-main {
    background: var(--docs-content-bg);
    min-width: 0;
}

.docs-content-wrap {
    max-width: var(--docs-content-max);
    margin: 0 auto;
    padding: 2rem 2.5rem 3rem;
}

.docs-hero-title {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.5rem;
    color: #1a365d;
    scroll-margin-top: var(--docs-scroll-pad);
}

.docs-hero-subtitle {
    font-size: 1rem;
    color: var(--docs-text-muted);
    margin-bottom: 1.5rem;
    padding-bottom: 0;
    border-bottom: none;
}

.docs-video-intro {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--docs-border);
    scroll-margin-top: var(--docs-scroll-pad);
}

.docs-video-embed {
    position: relative;
    width: 100%;
    max-width: 960px;
    padding-bottom: 56.25%;
    height: 0;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--docs-border);
}

.docs-video-poster,
.docs-video-embed iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.docs-video-poster {
    padding: 0;
    margin: 0;
    cursor: pointer;
    background: #000;
    display: block;
}

.docs-video-poster img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.docs-video-play {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 72px;
    height: 50px;
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.78);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

.docs-video-play::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-38%, -50%);
    border-style: solid;
    border-width: 10px 0 10px 18px;
    border-color: transparent transparent transparent #fff;
}

.docs-video-caption {
    margin: 0.75rem 0 0;
    font-size: 0.9375rem;
    color: var(--docs-text-muted);
}

.docs-chapter {
    margin-bottom: 2.5rem;
    scroll-margin-top: var(--docs-scroll-pad);
}

.docs-chapter > .docs-chapter-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 1rem;
    padding-top: 0.5rem;
    scroll-margin-top: var(--docs-scroll-pad);
}

/* Markdown body */
.docs-article h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 2rem 0 0.75rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--docs-border);
    scroll-margin-top: var(--docs-scroll-pad);
}

.docs-chapter .docs-article > h2:first-child {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
}

.docs-article h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 1.25rem 0 0.5rem;
    scroll-margin-top: var(--docs-scroll-pad);
}

.docs-article p { margin: 0 0 1rem; }

.docs-article ul, .docs-article ol {
    margin: 0 0 1rem 1.25rem;
}

.docs-article li { margin-bottom: 0.35rem; }

.docs-article a {
    color: var(--docs-accent);
    text-decoration: none;
}

.docs-article a:hover { text-decoration: underline; }

.docs-article code {
    font-family: var(--docs-mono);
    font-size: 0.88em;
    background: #f3f4f6;
    padding: 0.12em 0.35em;
    border-radius: 3px;
    border: 1px solid var(--docs-border);
}

.docs-article pre {
    background: #f8f9fa;
    border: 1px solid var(--docs-border);
    border-radius: 4px;
    padding: 1rem;
    overflow-x: auto;
    margin: 0 0 1rem;
    font-size: 0.8125rem;
}

.docs-article pre code {
    background: none;
    border: none;
    padding: 0;
}

.docs-article table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 1rem;
    font-size: 0.875rem;
}

.docs-article th, .docs-article td {
    border: 1px solid var(--docs-border);
    padding: 0.5rem 0.75rem;
    text-align: left;
}

.docs-article th {
    background: #f9fafb;
    font-weight: 600;
}

.docs-article hr {
    border: none;
    border-top: 1px solid var(--docs-border);
    margin: 1.5rem 0;
}

.docs-figure {
    margin: 1.25rem 0 1.75rem;
}

/* Screenshots: fit the text column (source PNGs captured at 2x device scale) */
.docs-article img {
    display: block;
    width: auto;
    max-width: min(100%, 680px);
    height: auto;
    object-fit: contain;
    object-position: left top;
    margin: 1rem auto;
    border: 1px solid var(--docs-border);
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.docs-article .docs-figure img,
.docs-article img.guide-screenshot {
    max-width: min(100%, 680px);
}

.docs-article img[src*="network-agent"],
.docs-article img[src*="network-router"],
.docs-article img[src*="protein-structure"] {
    max-width: min(100%, 420px);
}

.docs-figure figcaption {
    margin-top: 0.5rem;
    font-size: 0.8125rem;
    color: var(--docs-text-muted);
    line-height: 1.45;
}

.docs-figure-zoom img,
.docs-article .docs-figure img {
    cursor: zoom-in;
}

.docs-article img[src*="graphicabstract"] {
    max-width: 100%;
}

.docs-network-legend-table td,
.docs-network-legend-table th {
    vertical-align: middle;
}

.docs-network-legend-table td:first-child,
.docs-network-legend-table th:first-child {
    width: 10rem;
    text-align: center;
}

.docs-network-legend-cell {
    line-height: 1.4;
}

.docs-network-legend-cell--visual {
    padding-top: 0.55rem;
    padding-bottom: 0.55rem;
}

.docs-network-legend-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 2.5rem;
    width: 100%;
}

.docs-network-node {
    flex-shrink: 0;
    border-radius: 50%;
    border: 2px solid;
    box-sizing: border-box;
}

.docs-network-node--kinase {
    width: 14px;
    height: 14px;
    background: #3b82f6;
    border-color: #2563eb;
}

.docs-network-node--phosphatase {
    width: 14px;
    height: 14px;
    background: #dc2626;
    border-color: #b91c1c;
}

.docs-network-node--substrate {
    width: 14px;
    height: 14px;
    background: #93a0ad;
    border-color: #7a8794;
}

.docs-network-node--pie {
    width: 14px;
    height: 14px;
    border-width: 2px;
    border-color: #c0cad5;
    background: #f7f9fb;
}

.docs-network-node--pie-kinase-substrate {
    background: conic-gradient(from 0deg, #3b82f6 0deg 180deg, #8b97a4 180deg 360deg);
}

.docs-network-node--family {
    width: 32px;
    height: 32px;
    border-width: 4px;
}

.docs-network-node--family-kinase {
    background: #3b82f6;
    border-color: #2563eb;
}

.docs-network-node--family-phosphatase {
    background: #dc2626;
    border-color: #b91c1c;
}

.docs-network-arrow-svg {
    display: block;
    width: 5.5rem;
    height: 1.25rem;
    flex-shrink: 0;
    overflow: visible;
}

.docs-network-arrow-node {
    fill: #93a0ad;
    stroke: #7a8794;
    stroke-width: 2;
}

.docs-network-arrow-node--kinase {
    fill: #3b82f6;
    stroke: #2563eb;
}

.docs-network-arrow-node--phosphatase {
    fill: #dc2626;
    stroke: #b91c1c;
}

.docs-network-arrow-node--substrate {
    fill: #93a0ad;
    stroke: #7a8794;
}

.docs-network-arrow-stem {
    stroke: #2563eb;
    stroke-width: 2;
    stroke-linecap: round;
}

.docs-network-arrow-head {
    fill: #2563eb;
}

.docs-network-arrow-svg--phosphatase .docs-network-arrow-stem {
    stroke: #b91c1c;
}

.docs-network-arrow-svg--phosphatase .docs-network-arrow-head {
    fill: #b91c1c;
}

.docs-network-arrow-node--selected {
    fill: #fff;
    stroke: #39ff14;
}

.docs-network-arrow-stem--selected {
    stroke: #39ff14;
}

.docs-network-arrow-head--selected {
    fill: #39ff14;
}

.docs-figure-zoom {
    display: block;
    margin: 0 auto;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: zoom-in;
}

.docs-figure-zoom:focus-visible {
    outline: 2px solid var(--docs-accent);
    outline-offset: 4px;
    border-radius: 4px;
}

.docs-image-lightbox {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: rgba(15, 23, 42, 0.82);
}

.docs-image-lightbox[hidden] {
    display: none;
}

.docs-image-lightbox img {
    display: block;
    max-width: min(96vw, 1400px);
    max-height: 92vh;
    width: auto;
    height: auto;
    margin: 0;
    border: 0;
    border-radius: 4px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
    object-fit: contain;
}

.docs-image-lightbox-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 2.5rem;
    height: 2.5rem;
    border: 0;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.92);
    color: #1a365d;
    font-size: 1.75rem;
    line-height: 1;
    cursor: pointer;
}

.docs-image-lightbox-close:hover,
.docs-image-lightbox-close:focus-visible {
    background: #fff;
}

body.docs-lightbox-open {
    overflow: hidden;
}

/* Blockquotes from MD → admonitions via JS class */
.docs-article blockquote {
    margin: 1rem 0;
    padding: 0.65rem 1rem;
    border-left: 4px solid #3b82f6;
    background: #f9fafb;
    border-radius: 0 4px 4px 0;
    color: var(--docs-text);
}

.docs-article blockquote.admonition-warning {
    border-left-color: #f59e0b;
    background: #fffbeb;
}

.docs-article blockquote.admonition-tip {
    border-left-color: #10b981;
    background: #ecfdf5;
}

.docs-article blockquote p { margin: 0; }
.docs-article blockquote p strong:first-child { display: block; margin-bottom: 0.25rem; }

.docs-loading, .docs-error {
    padding: 2rem;
    color: var(--docs-text-muted);
    text-align: center;
}

.docs-error { color: #b91c1c; }

.docs-footer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--docs-border);
    font-size: 0.8125rem;
    color: var(--docs-text-muted);
}

.docs-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 150;
}

@media (max-width: 768px) {
    .docs-mobile-bar { display: block; }
    .docs-shell { padding-left: 0; }
    .docs-sidebar {
        position: fixed;
        left: 0;
        top: var(--docs-top-offset);
        width: min(100%, var(--docs-sidebar-width));
        z-index: 160;
        transform: translateX(-100%);
        transition: transform 0.2s ease;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
    }
    body.docs-sidebar-open .docs-sidebar { transform: translateX(0); }
    body.docs-sidebar-open .docs-backdrop { display: block; }
    .docs-content-wrap { padding: 1.25rem 1rem 2rem; }
}