/* Docs Page Layout */
.docs-layout { display: flex; min-height: 100vh; padding-top: var(--nav-height); }

.docs-sidebar {
    width: 300px; position: fixed; top: var(--nav-height); bottom: 0; left: 0;
    background: var(--bg-secondary); border-right: 1px solid var(--border-color);
    overflow-y: auto; padding: 20px 0; z-index: 10;
    transition: background var(--transition-normal), border var(--transition-normal);
}
[dir="rtl"] .docs-sidebar { left: auto; right: 0; border-right: none; border-left: 1px solid var(--border-color); }

.sidebar-header { padding: 0 20px 16px; border-bottom: 1px solid var(--border-color); }
.sidebar-header h3 { font-size: 1.1rem; margin-bottom: 12px; }
.sidebar-search {
    width: 100%; padding: 8px 12px; background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: 8px; color: var(--text-primary); font-size: 0.85rem; font-family: inherit; outline: none;
}
.sidebar-search:focus { border-color: var(--accent-primary); }

.sidebar-nav { padding: 12px 0; }
.sidebar-group { margin-bottom: 8px; }
.sidebar-group-title {
    padding: 8px 20px 4px; font-size: 0.75rem; font-weight: 700; color: var(--accent-primary);
    letter-spacing: 1px; text-transform: uppercase;
}
.sidebar-link {
    display: block; padding: 6px 20px 6px 28px; color: var(--text-secondary); text-decoration: none;
    font-size: 0.88rem; border-left: 2px solid transparent; transition: all var(--transition-fast);
}
[dir="rtl"] .sidebar-link { padding: 6px 28px 6px 20px; border-left: none; border-right: 2px solid transparent; }
.sidebar-link:hover { color: var(--text-primary); background: var(--bg-card); }
.sidebar-link.active { color: var(--accent-primary); border-left-color: var(--accent-primary); background: var(--tag-bg); }
[dir="rtl"] .sidebar-link.active { border-left-color: transparent; border-right-color: var(--accent-primary); }
.sidebar-link.hidden-search { display: none; }

.docs-content {
    flex: 1; margin-left: 300px; padding: 40px 48px; max-width: 900px;
}
[dir="rtl"] .docs-content { margin-left: 0; margin-right: 300px; }

.doc-section { padding-bottom: 60px; border-bottom: 1px solid var(--border-color); margin-bottom: 40px; }
.doc-breadcrumb { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 8px; }
.doc-title { font-size: 2rem; font-weight: 800; margin-bottom: 12px; }
.doc-meta { display: flex; flex-wrap: wrap; gap: 20px; margin-bottom: 24px; font-size: 0.88rem; color: var(--text-secondary); }
.doc-block { margin-bottom: 32px; }
.doc-block h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 12px; color: var(--text-primary); }
.doc-block h3 { font-size: 1.15rem; font-weight: 700; margin: 20px 0 8px; }
.doc-block p { color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; }

.doc-annotation {
    background: var(--tag-bg); border-left: 3px solid var(--accent-primary); border-radius: 0 8px 8px 0;
    padding: 14px 18px; margin: 16px 0; font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7;
}
[dir="rtl"] .doc-annotation { border-left: none; border-right: 3px solid var(--accent-primary); border-radius: 8px 0 0 8px; }

/* Code blocks */
.code-block {
    background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px;
    overflow: hidden; margin: 16px 0;
}
.code-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 10px 16px; background: var(--bg-secondary); border-bottom: 1px solid var(--border-color);
    font-size: 0.8rem; color: var(--text-muted); font-family: var(--font-mono);
}
.copy-btn {
    padding: 4px 12px; background: var(--tag-bg); border: 1px solid var(--border-color); border-radius: 6px;
    color: var(--text-secondary); font-size: 0.78rem; cursor: pointer; font-family: inherit;
}
.copy-btn:hover { border-color: var(--accent-primary); color: var(--accent-primary); }
pre { padding: 20px; overflow-x: auto; }
code { font-family: var(--font-mono); font-size: 0.88rem; line-height: 1.7; }
.code-keyword { color: #c792ea; }
.code-string { color: #c3e88d; }
.code-type { color: #ffcb6b; }
.code-comment { color: #546e7a; }
.code-func { color: #82aaff; }
.code-number { color: #f78c6c; }
[data-theme="light"] .code-keyword { color: #7c3aed; }
[data-theme="light"] .code-string { color: #16a34a; }
[data-theme="light"] .code-type { color: #d97706; }
[data-theme="light"] .code-comment { color: #9ca3af; }
[data-theme="light"] .code-func { color: #2563eb; }
[data-theme="light"] .code-number { color: #dc2626; }

/* Function list */
.function-list { display: flex; flex-direction: column; gap: 12px; }
.function-item { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 10px; padding: 16px; }
.function-sig { font-family: var(--font-mono); font-weight: 600; color: var(--accent-primary); margin-bottom: 6px; }
.function-item p { margin: 0; font-size: 0.9rem; }

/* Flow diagram */
.flow-diagram { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 20px 0; }
.flow-step {
    background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 10px;
    padding: 10px 16px; font-size: 0.88rem; display: flex; align-items: center; gap: 8px;
}
.flow-num {
    width: 24px; height: 24px; display: flex; align-items: center; justify-content: center;
    background: var(--accent-primary); color: white; border-radius: 50%; font-size: 0.75rem; font-weight: 700;
}
.flow-arrow { color: var(--text-muted); font-size: 1.2rem; }

/* Mode cards */
.mode-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.mode-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px; padding: 20px; }
.mode-card h3 { font-size: 1rem; margin-bottom: 8px; }
.mode-card p { font-size: 0.88rem; margin: 0; }
.mode-default { border-top: 3px solid var(--success); }
.mode-auto { border-top: 3px solid var(--warning); }
.mode-bypass { border-top: 3px solid var(--danger); }

/* Tool doc */
.tool-doc { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px; padding: 24px; margin-bottom: 20px; }
.tool-doc h2 { font-family: var(--font-mono); color: var(--accent-primary); font-size: 1.2rem; margin-bottom: 4px; }
.tool-doc-meta { font-size: 0.8rem; color: var(--text-muted); font-family: var(--font-mono); margin-bottom: 12px; }
.tool-params { margin-top: 16px; }
.tool-params h4 { font-size: 0.95rem; margin-bottom: 8px; }

/* Security modules */
.security-modules-list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.sec-mod { padding: 8px 12px; background: var(--bg-secondary); border-radius: 6px; font-size: 0.88rem; }
.sec-mod code { color: var(--accent-primary); }
.sec-mod span:first-of-type { color: var(--text-muted); font-family: var(--font-mono); font-size: 0.8rem; }

/* Species grid */
.species-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px; margin: 16px 0; }
.species-item {
    background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px;
    padding: 8px 12px; text-align: center; font-size: 0.88rem;
}
.species-emoji { font-size: 1.4rem; display: block; margin-bottom: 2px; }

/* Rarity bars */
.rarity-bars { display: flex; flex-direction: column; gap: 8px; margin: 16px 0; }
.rarity-bar { display: flex; align-items: center; gap: 12px; }
.rarity-label { width: 90px; font-size: 0.85rem; font-weight: 600; }
.rarity-fill { height: 24px; border-radius: 4px; color: white; font-size: 0.8rem; display: flex; align-items: center; padding-left: 8px; min-width: 30px; }

/* Gate steps */
.gate-steps { display: flex; flex-direction: column; gap: 10px; margin: 16px 0; }
.gate-step { display: flex; align-items: flex-start; gap: 12px; padding: 10px 14px; background: var(--bg-card); border-radius: 8px; border: 1px solid var(--border-color); }
.gate-num { width: 28px; height: 28px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; background: var(--accent-primary); color: white; border-radius: 50%; font-size: 0.8rem; font-weight: 700; }

/* Command list */
.cmd-list { display: flex; flex-direction: column; gap: 8px; }
.cmd-item { padding: 10px 14px; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; font-size: 0.92rem; }
.cmd-item code { color: var(--accent-primary); font-weight: 600; font-size: 0.9rem; }

/* Logo link */
.logo-link { display: flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; }

/* ─── Docs Hub Page ─── */
.docs-hub {
    padding-top: calc(var(--nav-height) + 40px);
    max-width: var(--container-max);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
    padding-bottom: 80px;
}

.docs-hub-header {
    text-align: center;
    margin-bottom: 48px;
}

.docs-hub-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
    margin-bottom: 60px;
}

.docs-hub-card {
    display: block;
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
}

.docs-hub-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.15);
}

.docs-hub-card-icon {
    font-size: 2rem;
    margin-bottom: 12px;
    display: block;
}

.docs-hub-card h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.docs-hub-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.docs-hub-card-meta {
    display: flex;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* ─── Experiment Cards (Hub) ─── */
.docs-hub-experiments {
    margin-top: 20px;
}

.docs-hub-experiments h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.experiment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
    margin-top: 20px;
}

.experiment-card {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s;
}

.experiment-card:hover {
    border-color: var(--accent-primary);
    background: var(--tag-bg);
}

.experiment-icon { font-size: 1.5rem; }
.experiment-card strong { font-size: 1rem; }
.experiment-card span:last-child { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.5; }

/* ─── Try This Boxes (Doc pages) ─── */
.try-this-box {
    margin: 24px 0 32px;
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg-card);
}

.try-this-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: rgba(99, 102, 241, 0.08);
    border-bottom: 1px solid rgba(99, 102, 241, 0.2);
    font-size: 0.95rem;
}

.try-this-icon { font-size: 1.2rem; }

.try-this-content {
    padding: 16px;
}

.try-this-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.try-this-link {
    display: inline-block;
    padding: 8px 16px;
    background: var(--accent-primary);
    color: white;
    border-radius: 8px;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    transition: opacity 0.2s;
}

.try-this-link:hover { opacity: 0.85; }

/* ─── Back to Hub link ─── */
.sidebar-back-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 600;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-back-link:hover { text-decoration: underline; }

/* ─── Gamification Bar ─── */
.gam-bar {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    z-index: 998;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    height: 44px;
    transition: all 0.3s;
}

.gam-bar-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 16px;
}

.gam-level {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.gam-level-num {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-primary), #a855f7);
    color: white;
    border-radius: 50%;
    font-weight: 800;
    font-size: 0.8rem;
}

.gam-level-name {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.gam-xp-section {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.gam-xp-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-card);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.gam-xp-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), #a855f7);
    border-radius: 4px;
    transition: width 0.5s ease;
}

.gam-xp-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    white-space: nowrap;
    flex-shrink: 0;
}

.gam-stats {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

.gam-stat {
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: default;
}

/* XP Popup */
.gam-xp-popup {
    position: fixed;
    top: 80px;
    right: 24px;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--accent-primary), #a855f7);
    color: white;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
    z-index: 10000;
    opacity: 0;
    transform: translateY(-20px);
    transition: all 0.3s ease;
    box-shadow: 0 8px 32px rgba(99,102,241,0.4);
}

.gam-xp-popup.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Badge Popup */
.gam-badge-popup {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    z-index: 10000;
    opacity: 0;
    transition: all 0.4s ease;
}

.gam-badge-popup.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.gam-badge-popup-inner {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: var(--bg-card);
    border: 2px solid #f59e0b;
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
    font-size: 0.95rem;
}

.gam-badge-icon { font-size: 2rem; }

/* Challenge Cards */
.challenge-card {
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 12px;
    transition: all 0.2s;
}

.challenge-card:hover {
    border-color: var(--accent-primary);
}

.challenge-card.completed {
    border-color: var(--success);
    background: rgba(34,197,94,0.05);
}

.challenge-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.challenge-status { font-size: 1.1rem; }

.challenge-xp {
    margin-left: auto;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent-primary);
    font-family: var(--font-mono);
}

.challenge-card.completed .challenge-xp {
    color: var(--success);
}

.challenge-card p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
    margin: 0;
}

/* ─── Tool Page Layout ─── */
.tool-page {
    padding-top: calc(var(--nav-height) + 60px);
    max-width: 900px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
    padding-bottom: 80px;
}

.tool-hero {
    margin-bottom: 40px;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    position: relative;
    overflow: hidden;
}

.tool-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), #a855f7, #ec4899);
}

.tool-hero-breadcrumb {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.tool-hero-breadcrumb a {
    color: var(--accent-primary);
    text-decoration: none;
}

.tool-hero-breadcrumb a:hover { text-decoration: underline; }

.tool-hero h1 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tool-hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 12px;
}

.tool-hero-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Tool sections */
.tool-section {
    margin-bottom: 36px;
}

.tool-section-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tool-section-title::before {
    content: '';
    width: 4px;
    height: 24px;
    background: var(--accent-primary);
    border-radius: 2px;
}

/* Simulation area */
.sim-area {
    background: var(--bg-card);
    border: 2px solid var(--accent-primary);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 32px;
}

.sim-area-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--accent-primary);
}

.sim-area-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.sim-controls {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: flex-end;
    margin-bottom: 16px;
}

.sim-input-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
    min-width: 200px;
}

.sim-input-group label {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sim-input {
    padding: 10px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s;
}

.sim-input:focus { border-color: var(--accent-primary); }

.sim-btn {
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--accent-primary), #a855f7);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: opacity 0.2s;
    white-space: nowrap;
}

.sim-btn:hover { opacity: 0.85; }

.sim-output {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.7;
    min-height: 80px;
    white-space: pre-wrap;
    overflow-x: auto;
}

/* Related tools */
.related-tools {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.related-tool-link {
    padding: 6px 14px;
    background: var(--tag-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.82rem;
    font-family: var(--font-mono);
    transition: all 0.2s;
}

.related-tool-link:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* Param table improvements */
.param-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
    margin-top: 12px;
}

.param-table th {
    text-align: left;
    padding: 10px 14px;
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border-color);
    font-weight: 600;
    color: var(--text-primary);
}

.param-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.param-table code {
    color: var(--accent-primary);
    font-weight: 600;
}

.param-required {
    color: var(--danger);
    font-weight: 600;
    font-size: 0.78rem;
}

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

/* ─── Book Library ─── */
.library-header {
    text-align: center;
    margin-bottom: 52px;
}

.library-tag {
    display: inline-block;
    padding: 4px 16px;
    background: var(--tag-bg);
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--accent-primary);
    margin-bottom: 16px;
}

.library-header h1 {
    font-size: 2.8rem;
    font-weight: 900;
    margin-bottom: 12px;
    font-family: 'Merriweather', serif;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.library-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Bookshelf */
.bookshelf {
    margin-bottom: 64px;
    position: relative;
}

.shelf-label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 20px;
    padding-left: 4px;
}

.bookshelf-row {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
    padding-bottom: 20px;
    position: relative;
    z-index: 1;
}

.shelf-wood {
    height: 12px;
    background: linear-gradient(180deg, rgba(139,92,246,0.15) 0%, rgba(139,92,246,0.05) 100%);
    border-radius: 0 0 8px 8px;
    border-top: 2px solid var(--border-color);
    margin-top: -8px;
    position: relative;
    z-index: 0;
}

/* Individual Book */
.book {
    display: flex;
    text-decoration: none;
    color: var(--text-primary);
    perspective: 800px;
    cursor: pointer;
    min-height: 320px;
}

.book-spine {
    width: 36px;
    flex-shrink: 0;
    background: var(--book-color, var(--accent-primary));
    border-radius: 4px 0 0 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px 0;
    position: relative;
    z-index: 2;
    box-shadow: 2px 0 8px rgba(0,0,0,0.2);
}

.book-spine-title {
    writing-mode: vertical-lr;
    transform: rotate(180deg);
    font-size: 0.7rem;
    font-weight: 700;
    color: white;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.book-spine-vol {
    writing-mode: vertical-lr;
    transform: rotate(180deg);
    font-size: 0.6rem;
    color: rgba(255,255,255,0.7);
    font-weight: 600;
}

.book-cover {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: none;
    border-radius: 0 12px 12px 0;
    overflow: hidden;
    transition: all 0.35s ease;
    transform-origin: left center;
    position: relative;
}

.book-cover::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--book-color, var(--accent-primary));
    opacity: 0.6;
}

.book:hover .book-cover {
    transform: rotateY(-8deg) translateX(8px);
    box-shadow: -8px 4px 24px rgba(0,0,0,0.25);
    border-color: var(--book-color, var(--accent-primary));
}

.book-cover-inner {
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.book-icon {
    font-size: 2rem;
    margin-bottom: 12px;
    display: block;
}

.book-vol {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--book-color, var(--accent-primary));
    margin-bottom: 6px;
}

.book-cover h2 {
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: 8px;
    font-family: 'Merriweather', serif;
    line-height: 1.3;
}

.book-cover p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
    flex: 1;
}

.book-meta {
    display: flex;
    gap: 12px;
    font-size: 0.72rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

/* ─── News Feed (Roadmap) ─── */
.news-feed {
    padding-top: calc(var(--nav-height) + 40px);
    max-width: 900px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
    padding-bottom: 80px;
}

.news-header {
    margin-bottom: 40px;
}

.news-header h1 {
    font-size: 2.4rem;
    font-weight: 900;
    font-family: 'Merriweather', serif;
    margin-bottom: 8px;
}

.news-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.news-filters {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.news-filter-btn {
    padding: 8px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.news-filter-btn:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.news-filter-btn.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

/* News Article Card */
.news-article {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px 32px;
    margin-bottom: 20px;
    transition: all 0.25s;
    position: relative;
    overflow: hidden;
}

.news-article:hover {
    border-color: var(--border-hover);
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}

.news-article::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 4px; height: 100%;
}

.news-article[data-status="shipped"]::before { background: var(--success); }
.news-article[data-status="beta"]::before { background: var(--warning); }
.news-article[data-status="internal"]::before { background: var(--accent-secondary); }
.news-article[data-status="planned"]::before { background: var(--text-muted); border-style: dashed; }

.news-article-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 12px;
}

.news-article-icon {
    font-size: 2rem;
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 12px;
}

.news-article-title-group {
    flex: 1;
}

.news-article-title-group h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.news-article-date {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.news-status-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.news-status-shipped { background: rgba(34,197,94,0.12); color: var(--success); }
.news-status-beta { background: rgba(245,158,11,0.12); color: var(--warning); }
.news-status-internal { background: rgba(139,92,246,0.12); color: var(--accent-secondary); }
.news-status-planned { background: rgba(104,104,128,0.12); color: var(--text-muted); }

.news-article-body {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
    margin-bottom: 16px;
    padding-left: 64px;
}

.news-article-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    padding-left: 64px;
}

.news-tag {
    padding: 3px 10px;
    background: var(--tag-bg);
    border-radius: 6px;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--tag-text);
}

.news-category-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 800;
    margin: 40px 0 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.news-category-dot {
    width: 12px; height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.news-dot-shipped { background: var(--success); }
.news-dot-beta { background: var(--warning); }
.news-dot-internal { background: var(--accent-secondary); }
.news-dot-planned { background: var(--text-muted); }

.news-category-count {
    margin-left: auto;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Book responsive */
@media (max-width: 1100px) {
    .bookshelf-row { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .bookshelf-row { grid-template-columns: repeat(2, 1fr); }
    .book { min-height: 260px; }
    .book-spine { width: 28px; }
    .book-spine-title { font-size: 0.6rem; }
    .library-header h1 { font-size: 1.8rem; }
    .book-cover h2 { font-size: 0.95rem; }
    .news-article-body, .news-article-tags { padding-left: 0; }
    .news-article-header { flex-wrap: wrap; }
}

@media (max-width: 500px) {
    .bookshelf-row { grid-template-columns: 1fr; }
}

/* ─── Core Pages (Full-Width) ─── */
.core-page {
    padding-top: calc(var(--nav-height) + 20px);
    max-width: 1100px;
    margin: 0 auto;
    padding-left: 32px;
    padding-right: 32px;
    padding-bottom: 80px;
}

/* Core Hero */
.core-hero {
    padding: 48px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    margin-bottom: 48px;
    position: relative;
    overflow: hidden;
}

.core-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), #a855f7, #ec4899, #f59e0b);
}

.core-hero::after {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 300px; height: 300px;
    background: radial-gradient(circle, rgba(99,102,241,0.08) 0%, transparent 70%);
    pointer-events: none;
}

.core-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--tag-bg);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: 12px;
}

.core-hero-icon { font-size: 1rem; }

.core-breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.core-breadcrumb a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.core-breadcrumb a:hover { color: var(--accent-primary); }
.core-breadcrumb-sep { opacity: 0.4; }

.core-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 8px;
    font-family: var(--font-mono);
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.core-hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 28px;
    line-height: 1.6;
}

.core-hero-stats {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}

.core-stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.core-stat-value {
    font-size: 1.3rem;
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--text-primary);
}

.core-stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Core Content */
.core-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

/* Core Sections */
.core-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: border-color 0.2s;
}

.core-section:hover {
    border-color: var(--border-hover);
}

.core-section-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px 32px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.core-section-num {
    font-size: 0.85rem;
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--accent-primary);
    background: var(--tag-bg);
    padding: 4px 10px;
    border-radius: 6px;
}

.core-section-header h2 {
    font-size: 1.35rem;
    font-weight: 700;
    margin: 0;
}

.core-section-body {
    padding: 32px;
}

.core-section-body > p {
    color: var(--text-secondary);
    line-height: 1.85;
    font-size: 1rem;
    margin-bottom: 24px;
}

.core-section-body > p code {
    background: var(--code-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.88em;
    color: var(--accent-primary);
}

/* Highlight Cards */
.core-highlight-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.core-highlight {
    padding: 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.2s;
}

.core-highlight:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.core-highlight-icon {
    font-size: 1.6rem;
    display: block;
    margin-bottom: 10px;
}

.core-highlight h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.core-highlight p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* Callouts */
.core-callout {
    display: flex;
    gap: 14px;
    padding: 18px 20px;
    border-radius: 12px;
    margin: 20px 0;
}

.core-callout-icon {
    font-size: 1.3rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.core-callout strong {
    display: block;
    margin-bottom: 4px;
    font-size: 0.95rem;
}

.core-callout p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

.core-callout-info {
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.core-callout-warn {
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

/* Feature Flags Grid */
.core-flags-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 10px;
    margin-top: 20px;
}

.core-flag {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.88rem;
}

.core-flag-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--success);
    flex-shrink: 0;
}

.core-flag code {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--accent-primary);
    font-size: 0.85rem;
}

.core-flag-status {
    margin-left: auto;
    color: var(--text-muted);
    font-size: 0.78rem;
}

/* Function Grid */
.core-func-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.core-func-card {
    padding: 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.2s;
}

.core-func-card:hover {
    border-color: var(--accent-primary);
}

.core-func-name {
    margin-bottom: 8px;
}

.core-func-name code {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1rem;
    color: var(--accent-primary);
}

.core-func-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

.core-func-tag {
    display: inline-block;
    padding: 2px 10px;
    background: var(--tag-bg);
    color: var(--tag-text);
    border-radius: 12px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Try Box */
.core-try-box {
    border: 2px solid rgba(99, 102, 241, 0.3);
    border-radius: 16px;
    overflow: hidden;
    background: var(--bg-card);
}

.core-try-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 24px;
    background: rgba(99, 102, 241, 0.08);
    border-bottom: 1px solid rgba(99, 102, 241, 0.2);
    font-size: 1rem;
}

.core-try-header span:first-child { font-size: 1.3rem; }

.core-try-body {
    padding: 24px;
}

.core-try-body p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.core-try-body p code {
    background: var(--code-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.88em;
    color: var(--accent-primary);
}

.core-try-prompts {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.core-try-prompts code {
    display: block;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-primary);
}

.core-try-link {
    display: inline-block;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--accent-primary), #a855f7);
    color: white;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: opacity 0.2s;
}

.core-try-link:hover { opacity: 0.85; }

/* State Table */
.core-state-table {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.core-state-row {
    display: grid;
    grid-template-columns: 1fr 1fr 2fr;
    gap: 12px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
    align-items: center;
}

.core-state-row:last-child { border-bottom: none; }

.core-state-header {
    background: var(--bg-secondary);
    font-weight: 700;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.core-state-row code {
    font-family: var(--font-mono);
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 0.85rem;
}

/* Flow Diagram */
.core-flow {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.core-flow-step {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.2s;
}

.core-flow-step:hover {
    border-color: var(--accent-primary);
}

.core-flow-step-loop {
    border-color: var(--warning);
    background: rgba(245, 158, 11, 0.05);
}

.core-flow-num {
    width: 36px; height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-primary), #a855f7);
    color: white;
    border-radius: 50%;
    font-weight: 800;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.core-flow-content h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.core-flow-content p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.core-flow-connector {
    width: 2px;
    height: 16px;
    background: var(--border-color);
    margin-left: 37px;
}

/* Permission Modes */
.core-modes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.core-mode {
    padding: 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    border-top: 4px solid transparent;
}

.core-mode-default { border-top-color: var(--success); }
.core-mode-auto { border-top-color: var(--warning); }
.core-mode-bypass { border-top-color: var(--danger); }

.core-mode-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.core-mode-icon { font-size: 1.4rem; }

.core-mode-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0;
}

.core-mode-badge {
    margin-left: auto;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.core-mode-badge-safe { background: rgba(34,197,94,0.15); color: var(--success); }
.core-mode-badge-warn { background: rgba(245,158,11,0.15); color: var(--warning); }
.core-mode-badge-danger { background: rgba(239,68,68,0.15); color: var(--danger); }

.core-mode p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 14px;
}

.core-mode-examples {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.core-mode-ex {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    font-weight: 600;
}

.core-mode-ex-block { background: rgba(239,68,68,0.1); color: var(--warning); }
.core-mode-ex-allow { background: rgba(34,197,94,0.1); color: var(--success); }

/* Tool Categories */
.core-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.core-category {
    padding: 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.core-category-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
}

.core-category-header span { font-size: 1.3rem; }
.core-category-header h4 { font-size: 0.95rem; font-weight: 700; margin: 0; }

.core-category-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.core-tool-chip {
    padding: 4px 12px;
    background: var(--tag-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    font-size: 0.78rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
}

.core-tool-chip:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* Prev/Next Footer Nav */
.core-nav-footer {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

.core-nav-prev,
.core-nav-next {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 16px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.2s;
    min-width: 160px;
}

.core-nav-next { text-align: right; margin-left: auto; }

.core-nav-prev:hover,
.core-nav-next:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.core-nav-dir {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.core-nav-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

/* ─── Core Hub Grid ─── */
.core-hub-header {
    text-align: center;
    margin-bottom: 48px;
    padding-top: 20px;
}

.core-hub-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin: 12px 0 8px;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.core-hub-header > p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.core-hub-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.core-hub-card {
    display: block;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    text-decoration: none;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.core-hub-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0,0,0,0.2);
}

.core-hub-card-num {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 3rem;
    font-weight: 900;
    font-family: var(--font-mono);
    color: var(--border-color);
    line-height: 1;
}

.core-hub-card-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    display: block;
}

.core-hub-card h2 {
    font-size: 1.6rem;
    font-weight: 800;
    font-family: var(--font-mono);
    margin-bottom: 4px;
}

.core-hub-card-sub {
    color: var(--accent-primary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.core-hub-card > p:last-of-type {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.core-hub-card-meta {
    display: flex;
    gap: 16px;
    font-size: 0.78rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Responsive */
@media (max-width: 768px) {
    .core-page { padding-left: 16px; padding-right: 16px; }
    .core-hero { padding: 28px 20px; }
    .core-hero h1 { font-size: 2rem; }
    .core-section-body { padding: 20px; }
    .core-section-header { padding: 16px 20px; }
    .core-hub-grid { grid-template-columns: 1fr; }
    .core-hub-header h1 { font-size: 1.8rem; }
    .core-highlight-cards { grid-template-columns: 1fr; }
    .core-modes-grid { grid-template-columns: 1fr; }
    .core-func-grid { grid-template-columns: 1fr; }
    .core-state-row { grid-template-columns: 1fr; gap: 4px; }
    .core-nav-footer { flex-direction: column; }
    .core-nav-next { text-align: left; margin-left: 0; }
    .core-flow-connector { margin-left: 27px; }
}

/* Responsive */
@media (max-width: 768px) {
    .docs-sidebar { display: none; }
    .docs-content { margin-left: 0 !important; margin-right: 0 !important; padding: 20px 16px; }
    .docs-hub-grid { grid-template-columns: 1fr; }
    .experiment-grid { grid-template-columns: 1fr; }
    .gam-bar { height: 36px; }
    .gam-level-name, .gam-xp-text { display: none; }
    .tool-hero h1 { font-size: 1.6rem; }
    .sim-controls { flex-direction: column; }
}