/* transform-graph API Documentation — Vistralis theme */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;600&display=swap');

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #0f1016;
    --bg-card: rgba(25, 27, 36, 0.6);
    --bg-sidebar: rgba(15, 16, 22, 0.95);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-blue: #3b82f6;
    --accent-cyan: #2dd4bf;
    --accent-green: #22c55e;
    --accent-amber: #f59e0b;
    --accent-red: #ef4444;
    --card-border: rgba(255, 255, 255, 0.05);
    --nav-bg: rgba(10, 10, 15, 0.95);
    --sidebar-width: 260px;
    --code-bg: #12131a;

    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

/* ── Navigation ── */
.docs-nav {
    position: fixed;
    top: 0;
    width: 100%;
    height: 60px;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
    z-index: 100;
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-brand img {
    height: 24px;
}

.nav-breadcrumb {
    color: var(--text-muted);
    margin: 0 0.4rem;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-cyan);
}

/* ── Centered Wrapper (PyTorch-style) ── */
.docs-wrapper {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 60px;
    min-height: calc(100vh - 60px);
}

/* ── Sidebar ── */
.docs-sidebar {
    position: sticky;
    top: 60px;
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    height: calc(100vh - 60px);
    padding: 1.5rem 1rem;
    overflow-y: auto;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--card-border);
    flex-shrink: 0;
}

.sidebar-section {
    margin-bottom: 1.5rem;
}

.sidebar-section h4 {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    padding: 0 0.75rem;
}

.sidebar-section a {
    display: block;
    padding: 0.35rem 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.88rem;
    border-radius: 6px;
    transition: all 0.15s ease;
}

.sidebar-section a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.sidebar-section a.active {
    color: var(--accent-cyan);
    background: rgba(45, 212, 191, 0.08);
}

.sidebar-section a.sidebar-sub {
    padding-left: 1.5rem;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.sidebar-section a.sidebar-sub:hover {
    color: var(--text-secondary);
}

/* ── Main Content ── */
.docs-content {
    flex: 1;
    min-width: 0;
    padding: 2.5rem 3rem 4rem 3rem;
    max-width: 900px;
}

.docs-content h1 {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
}

.docs-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 3rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    letter-spacing: -0.01em;
}

.docs-content h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.docs-content h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.docs-content > .subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.docs-content p {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.7;
}

.docs-content a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: color 0.2s;
}

.docs-content a:hover {
    color: var(--accent-blue);
}

/* ── Code ── */
pre {
    background: var(--code-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    overflow-x: auto;
    margin: 1rem 0 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    color: #e2e8f0;
}

code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: rgba(255, 255, 255, 0.06);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    color: #93c5fd;
}

pre code {
    background: none;
    padding: 0;
    border-radius: 0;
    font-size: inherit;
    color: inherit;
}

/* ── Tables ── */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 0.75rem 0 1.5rem;
    font-size: 0.9rem;
}

th {
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    padding: 0.6rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

td {
    padding: 0.5rem 1rem;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
}

tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* ── Cards Grid ── */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.docs-card {
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.25rem;
    backdrop-filter: blur(6px);
    transition: transform 0.2s, border-color 0.2s;
    text-decoration: none !important;
    display: block;
}

.docs-card:hover {
    transform: translateY(-2px);
    border-color: rgba(45, 212, 191, 0.2);
}

.docs-card h3 {
    font-size: 1rem;
    margin-top: 0;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}

.docs-card p {
    font-size: 0.88rem;
    margin-bottom: 0.25rem;
}

.card-count {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   CLASS SECTION — the main content block
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.class-section {
    margin-top: 3.5rem;
    padding-top: 2rem;
    border-top: 2px solid rgba(255, 255, 255, 0.06);
}

.class-section:first-child {
    margin-top: 1rem;
    padding-top: 0;
    border-top: none;
}

.class-section > h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.class-name {
    font-size: 1.25rem;
    color: var(--accent-cyan);
    background: rgba(45, 212, 191, 0.08);
    padding: 0.25em 0.6em;
    border-radius: 6px;
}

.class-tag {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.2em 0.6em;
    border-radius: 4px;
    background: rgba(59, 130, 246, 0.12);
    color: var(--accent-blue);
}

.class-bases {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.note-muted {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-style: italic;
    margin-top: 1rem;
}

/* ── Section Labels (Constructors / Methods) ── */
.section-label {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   METHOD CARD — individual methods
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.method-card {
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.25rem;
    backdrop-filter: blur(6px);
    transition: border-color 0.2s;
}

.method-card:hover {
    border-color: rgba(255, 255, 255, 0.1);
}

.method-header {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.method-name {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary) !important;
    background: none !important;
    padding: 0 !important;
}

.method-card pre.signature {
    margin: 0 0 1rem;
    padding: 0.75rem 1rem;
    font-size: 0.82rem;
    border-radius: 6px;
    line-height: 1.7;
}

.method-card p {
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ── Badges ── */
.badge {
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.15em 0.5em;
    border-radius: 4px;
    white-space: nowrap;
}

.badge-classmethod {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-blue);
}

.badge-static {
    background: rgba(168, 85, 247, 0.15);
    color: #a855f7;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   STRUCTURED DOCSTRING SECTIONS
   Inspired by PyTorch/Sphinx docs layout
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

/* Parameters / Properties / Returns sections */
.params-section,
.returns-section,
.raises-section {
    margin: 1rem 0;
    padding: 1rem 1.25rem;
    background: rgba(255, 255, 255, 0.02);
    border-left: 3px solid var(--accent-blue);
    border-radius: 0 8px 8px 0;
}

.params-section h5,
.returns-section h5,
.raises-section h5,
.example-section h5 {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent-blue);
    margin-bottom: 0.75rem;
}

.returns-section {
    border-left-color: var(--accent-green);
}

.returns-section h5 {
    color: var(--accent-green);
}

.raises-section {
    border-left-color: var(--accent-red);
}

.raises-section h5 {
    color: var(--accent-red);
}

/* Definition lists for params */
dl {
    margin: 0;
}

dt {
    font-size: 0.9rem;
    padding: 0.3rem 0 0.1rem;
    color: var(--text-primary);
}

dt + dt {
    margin-top: 0.75rem;
}

dd {
    font-size: 0.88rem;
    color: var(--text-secondary);
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.param-type {
    color: var(--text-muted);
    font-size: 0.85em;
}

/* Callouts */
.callout {
    margin: 1rem 0 1.5rem;
    padding: 0.75rem 1rem;
    border-radius: 0 8px 8px 0;
    color: var(--text-secondary);
    font-size: 0.92rem;
}

.callout strong {
    display: block;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.25rem;
}

.callout-note {
    border-left: 3px solid var(--accent-cyan);
    background: rgba(45, 212, 191, 0.05);
}

.callout-note strong {
    color: var(--accent-cyan);
}

.callout-warning {
    border-left: 3px solid var(--accent-amber);
    background: rgba(245, 158, 11, 0.05);
}

.callout-warning strong {
    color: var(--accent-amber);
}

/* Example sections */
.example-section {
    margin: 1rem 0;
}

.example-section h5 {
    color: var(--text-muted);
}

.example-section ul {
    list-style: none;
    padding: 0;
}

.example-section ul li {
    padding: 0.4rem 0;
    padding-left: 1rem;
    border-left: 2px solid rgba(255, 255, 255, 0.06);
    margin-bottom: 0.25rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Lists */
.docs-content ul,
.docs-content ol {
    margin: 0.5rem 0 1rem 1.5rem;
    color: var(--text-secondary);
}

.docs-content li {
    margin-bottom: 0.3rem;
}

/* ── Footer ── */
.docs-footer {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 3rem;
    border-top: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: 0.85rem;
    display: flex;
    justify-content: space-between;
}

/* ── Responsive ── */
@media (max-width: 900px) {
    .docs-sidebar {
        display: none;
    }

    .docs-content {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }

    .docs-footer {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
}

@media (max-width: 600px) {
    .nav-links {
        display: none;
    }

    .docs-content h1 {
        font-size: 1.8rem;
    }

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