/* ═══════════════════════════════════════════════════════════════
   AGENTSTRIKE.AI - AI RED TEAM ACADEMY
   Complete Stylesheet with Subsection Navigation
   ═══════════════════════════════════════════════════════════════ */

:root {
    --bg-void: #0a0f1a;
    --bg-deep: #0d1320;
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-card: #1e293b;
    --bg-elevated: #273548;
    --bg-hover: #334155;
    --accent-primary: #10b981;
    --accent-primary-light: #34d399;
    --accent-primary-glow: rgba(16, 185, 129, 0.15);
    --accent-secondary: #0ea5e9;
    --accent-danger: #ef4444;
    --accent-warning: #f59e0b;
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-indigo: #6366f1;
    --accent-success: #22c55e;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --text-muted: #475569;
    --border-subtle: rgba(148, 163, 184, 0.08);
    --border-light: rgba(148, 163, 184, 0.12);
    --border-medium: rgba(148, 163, 184, 0.2);
    --gradient-primary: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    --gradient-danger: linear-gradient(135deg, var(--accent-danger), var(--accent-warning));
    --sidebar-width: 300px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 20px; }
body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-void);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 15px;
    display: flex;
    min-height: 100vh;
}
::selection { background: var(--accent-primary); color: white; }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--bg-elevated); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--bg-hover); }

/* ═══════════════════════════════════════════════════════════════
   SIDEBAR NAVIGATION WITH SUBSECTIONS
   ═══════════════════════════════════════════════════════════════ */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-deep);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    z-index: 1000;
}
.sidebar-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
    flex-shrink: 0;
}
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
}
.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 0.85rem;
    color: white;
}
.logo-text { display: flex; flex-direction: column; }
.logo-title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1.05rem;
    line-height: 1.2;
}
.logo-title span { color: var(--accent-primary); }
.logo-subtitle {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

/* Navigation Scrollable Area */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem 0;
}
.nav-section {
    margin-bottom: 0.25rem;
}
.nav-section-title {
    padding: 0.6rem 1.5rem 0.4rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

/* Module Links */
.nav-module {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: all 0.15s ease;
    border-left: 3px solid transparent;
    cursor: pointer;
}
.nav-module:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}
.nav-module.active {
    background: var(--accent-primary-glow);
    color: var(--accent-primary);
    border-left-color: var(--accent-primary);
}
.nav-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--bg-secondary);
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    min-width: 24px;
    text-align: center;
}
.nav-module.active .nav-num {
    background: var(--accent-primary);
    color: white;
}
.nav-name { flex: 1; }
.nav-arrow {
    font-size: 0.7rem;
    color: var(--text-muted);
    transition: transform 0.2s;
}
.nav-module.expanded .nav-arrow {
    transform: rotate(90deg);
}

/* Subsection Links */
.nav-subsections {
    display: none;
    padding: 0.25rem 0 0.5rem;
    background: rgba(0,0,0,0.15);
}
.nav-subsections.show {
    display: block;
}
.nav-sub {
    display: block;
    padding: 0.4rem 1.5rem 0.4rem 3.5rem;
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: 0.78rem;
    transition: all 0.15s;
    border-left: 3px solid transparent;
}
.nav-sub:hover {
    color: var(--text-secondary);
    background: var(--bg-card);
}
.nav-sub.active {
    color: var(--accent-secondary);
    border-left-color: var(--accent-secondary);
}
.nav-sub-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-right: 0.5rem;
}

/* ═══════════════════════════════════════════════════════════════
   MAIN CONTENT AREA
   ═══════════════════════════════════════════════════════════════ */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    background: var(--bg-void);
}
.content-wrapper {
    max-width: 880px;
    margin: 0 auto;
    padding: 2.5rem 3.5rem;
}

/* Page Header */
.page-header {
    margin-bottom: 2.5rem;
    padding-bottom: 1.75rem;
    border-bottom: 1px solid var(--border-subtle);
}
.page-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--accent-primary);
    letter-spacing: 0.15em;
    margin-bottom: 0.6rem;
}
.page-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
    line-height: 1.2;
}
.page-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 680px;
    line-height: 1.65;
}

/* ═══════════════════════════════════════════════════════════════
   SUBSECTIONS
   ═══════════════════════════════════════════════════════════════ */
.subsection {
    margin-bottom: 3rem;
    scroll-margin-top: 20px;
}
.subsection-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1.15rem;
    padding-bottom: 0.65rem;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    gap: 0.7rem;
}
.subsection-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent-secondary);
    background: rgba(14, 165, 233, 0.12);
    padding: 0.25rem 0.55rem;
    border-radius: 4px;
}
.subsubsection-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    margin: 1.75rem 0 0.9rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.subsubsection-title::before {
    content: '›';
    color: var(--accent-warning);
    font-weight: 700;
}

/* ═══════════════════════════════════════════════════════════════
   PROSE & TEXT
   ═══════════════════════════════════════════════════════════════ */
.prose {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.75;
}
.prose p {
    margin-bottom: 1rem;
}
.prose strong {
    color: var(--text-primary);
    font-weight: 600;
}
.prose em {
    color: var(--accent-secondary);
    font-style: normal;
}
.prose code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82em;
    padding: 0.15rem 0.35rem;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 4px;
    color: var(--accent-secondary);
}
.prose ul, .prose ol {
    margin: 0.75rem 0 1rem 1.25rem;
}
.prose li {
    margin-bottom: 0.4rem;
}

/* ═══════════════════════════════════════════════════════════════
   CARDS & GRIDS
   ═══════════════════════════════════════════════════════════════ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.1rem;
    margin: 1.5rem 0;
}
.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 1.25rem;
    transition: all 0.2s ease;
}
.info-card:hover {
    border-color: var(--border-medium);
    transform: translateY(-2px);
}
.info-card-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.85rem;
}
.info-card-icon svg {
    width: 20px;
    height: 20px;
    color: white;
}
.info-card-icon.secondary { background: linear-gradient(135deg, var(--accent-secondary), var(--accent-indigo)); }
.info-card-icon.warning { background: var(--gradient-danger); }
.info-card-icon.purple { background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink)); }
.info-card h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}
.info-card p {
    font-size: 0.82rem;
    color: var(--text-tertiary);
    line-height: 1.55;
    margin: 0;
}

/* ═══════════════════════════════════════════════════════════════
   CODE BLOCKS
   ═══════════════════════════════════════════════════════════════ */
.code-block {
    margin: 1.5rem 0;
    background: var(--bg-void);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    overflow: hidden;
}
.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.65rem 1.1rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-subtle);
}
.code-header-left {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}
.code-dots {
    display: flex;
    gap: 5px;
}
.code-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.code-dots span:nth-child(1) { background: #ef4444; }
.code-dots span:nth-child(2) { background: #f59e0b; }
.code-dots span:nth-child(3) { background: #10b981; }
.code-filename {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--text-muted);
}
.code-lang {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6rem;
    font-weight: 600;
    color: var(--accent-primary);
    background: var(--accent-primary-glow);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    text-transform: uppercase;
}
.code-body {
    padding: 1.1rem 1.25rem;
    overflow-x: auto;
}
.code-body pre {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    line-height: 1.65;
    color: var(--text-secondary);
    margin: 0;
    white-space: pre-wrap;
    word-break: break-word;
}
.code-body .comment { color: var(--text-muted); }
.code-body .string { color: var(--accent-primary); }
.code-body .keyword { color: var(--accent-purple); }
.code-body .function { color: var(--accent-secondary); }

/* ═══════════════════════════════════════════════════════════════
   ATTACK BOXES
   ═══════════════════════════════════════════════════════════════ */
.attack-box {
    margin: 1.5rem 0;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    overflow: hidden;
    background: var(--bg-card);
}
.attack-header {
    padding: 0.85rem 1.25rem;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.08), rgba(245, 158, 11, 0.05));
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    gap: 0.85rem;
    flex-wrap: wrap;
}
.attack-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6rem;
    font-weight: 600;
    color: var(--accent-danger);
    background: rgba(239, 68, 68, 0.12);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    text-transform: uppercase;
}
.attack-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}
.attack-meta { margin-left: auto; }
.attack-difficulty {
    font-size: 0.65rem;
    font-weight: 500;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}
.difficulty-basic { background: rgba(16, 185, 129, 0.12); color: var(--accent-primary); }
.difficulty-intermediate { background: rgba(245, 158, 11, 0.12); color: var(--accent-warning); }
.difficulty-advanced { background: rgba(239, 68, 68, 0.12); color: var(--accent-danger); }
.difficulty-expert { background: rgba(139, 92, 246, 0.12); color: var(--accent-purple); }
.attack-body { padding: 1.25rem; }
.attack-section { margin-bottom: 1.1rem; }
.attack-section:last-child { margin-bottom: 0; }
.attack-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.4rem;
}
.attack-context {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 0.85rem 1.1rem;
    background: var(--bg-secondary);
    border-radius: 6px;
    border-left: 3px solid var(--accent-secondary);
}
.attack-payload {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    line-height: 1.6;
    padding: 1.1rem;
    background: var(--bg-void);
    border-radius: 6px;
    border-left: 3px solid var(--accent-danger);
    color: var(--accent-warning);
    white-space: pre-wrap;
    overflow-x: auto;
}
.attack-result {
    font-size: 0.85rem;
    padding: 0.85rem 1.1rem;
    background: rgba(16, 185, 129, 0.06);
    border-radius: 6px;
    border-left: 3px solid var(--accent-primary);
    color: var(--text-secondary);
}
.attack-analysis {
    font-size: 0.85rem;
    padding: 0.85rem 1.1rem;
    background: rgba(139, 92, 246, 0.06);
    border-radius: 6px;
    border-left: 3px solid var(--accent-purple);
    color: var(--text-secondary);
}

/* ═══════════════════════════════════════════════════════════════
   TECHNIQUE CARDS
   ═══════════════════════════════════════════════════════════════ */
.technique-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.1rem;
    margin: 1.5rem 0;
}
.technique-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.2s ease;
}
.technique-card:hover {
    border-color: var(--border-medium);
    transform: translateY(-2px);
}
.technique-header {
    padding: 0.85rem 1.1rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    gap: 0.65rem;
}
.technique-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--accent-secondary);
    background: rgba(14, 165, 233, 0.12);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}
.technique-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}
.technique-body { padding: 1.1rem; }
.technique-desc {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    line-height: 1.55;
    margin-bottom: 0.85rem;
}
.technique-example {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    padding: 0.65rem 0.85rem;
    background: var(--bg-void);
    border-radius: 5px;
    color: var(--accent-warning);
    white-space: pre-wrap;
    word-break: break-word;
}

/* ═══════════════════════════════════════════════════════════════
   ALERTS
   ═══════════════════════════════════════════════════════════════ */
.alert {
    margin: 1.5rem 0;
    padding: 1.1rem 1.25rem;
    border-radius: 8px;
    display: flex;
    gap: 0.85rem;
}
.alert-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 1px;
}
.alert-content h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}
.alert-content p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.55;
}
.alert-danger {
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
}
.alert-danger .alert-icon { color: var(--accent-danger); }
.alert-danger h4 { color: var(--accent-danger); }
.alert-warning {
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.2);
}
.alert-warning .alert-icon { color: var(--accent-warning); }
.alert-warning h4 { color: var(--accent-warning); }
.alert-info {
    background: rgba(14, 165, 233, 0.08);
    border: 1px solid rgba(14, 165, 233, 0.2);
}
.alert-info .alert-icon { color: var(--accent-secondary); }
.alert-info h4 { color: var(--accent-secondary); }
.alert-tip {
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.2);
}
.alert-tip .alert-icon { color: var(--accent-purple); }
.alert-tip h4 { color: var(--accent-purple); }

/* ═══════════════════════════════════════════════════════════════
   ILLUSTRATIONS
   ═══════════════════════════════════════════════════════════════ */
.illustration {
    margin: 2rem 0;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    overflow: hidden;
}
.illustration-header {
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-secondary);
}
.illustration-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    color: var(--text-tertiary);
}
.illustration-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.58rem;
    font-weight: 600;
    color: var(--accent-purple);
    background: rgba(139, 92, 246, 0.12);
    padding: 0.2rem 0.45rem;
    border-radius: 4px;
    text-transform: uppercase;
}
.illustration-body {
    padding: 1.75rem;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 280px;
    background: var(--bg-primary);
}
.illustration-body svg { max-width: 100%; height: auto; }
.illustration-caption {
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--border-subtle);
    font-size: 0.78rem;
    color: var(--text-muted);
    text-align: center;
    background: var(--bg-secondary);
}

/* ═══════════════════════════════════════════════════════════════
   TABLES
   ═══════════════════════════════════════════════════════════════ */
.data-table {
    width: 100%;
    margin: 1.5rem 0;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.82rem;
    background: var(--bg-card);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-subtle);
}
.data-table th {
    text-align: left;
    padding: 0.75rem 0.9rem;
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border-medium);
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 0.78rem;
    color: var(--text-primary);
}
.data-table td {
    padding: 0.75rem 0.9rem;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-secondary);
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: var(--bg-hover); }

/* ═══════════════════════════════════════════════════════════════
   BADGES
   ═══════════════════════════════════════════════════════════════ */
.badge {
    display: inline-flex;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.6rem;
    font-weight: 600;
    text-transform: uppercase;
    font-family: 'JetBrains Mono', monospace;
}
.badge-danger { background: rgba(239, 68, 68, 0.15); color: var(--accent-danger); border: 1px solid rgba(239, 68, 68, 0.25); }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: var(--accent-warning); border: 1px solid rgba(245, 158, 11, 0.25); }
.badge-success { background: rgba(16, 185, 129, 0.15); color: var(--accent-primary); border: 1px solid rgba(16, 185, 129, 0.25); }
.badge-info { background: rgba(14, 165, 233, 0.15); color: var(--accent-secondary); border: 1px solid rgba(14, 165, 233, 0.25); }

/* ═══════════════════════════════════════════════════════════════
   KEY CONCEPTS
   ═══════════════════════════════════════════════════════════════ */
.key-concept {
    margin: 1.75rem 0;
    padding: 1.25rem;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.06), rgba(14, 165, 233, 0.04));
    border: 1px solid rgba(16, 185, 129, 0.15);
    border-radius: 10px;
}
.key-concept-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}
.key-concept-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.key-concept-icon svg { width: 18px; height: 18px; color: white; }
.key-concept-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}
.key-concept-content {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ═══════════════════════════════════════════════════════════════
   PAGE NAVIGATION
   ═══════════════════════════════════════════════════════════════ */
.page-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 3.5rem;
    padding-top: 1.75rem;
    border-top: 1px solid var(--border-subtle);
    gap: 1rem;
}
.page-nav-link {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.9rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s;
    max-width: 45%;
}
.page-nav-link:hover {
    border-color: var(--accent-primary);
    background: var(--accent-primary-glow);
}
.page-nav-link.prev { flex-direction: row; }
.page-nav-link.next { flex-direction: row-reverse; text-align: right; margin-left: auto; }
.page-nav-label { font-size: 0.7rem; color: var(--text-muted); }
.page-nav-title { font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 0.9rem; }
.page-nav-arrow { color: var(--accent-primary); font-size: 1.1rem; }

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 1100px) {
    :root { --sidebar-width: 260px; }
    .content-wrapper { padding: 2rem 2.5rem; }
}
@media (max-width: 900px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .content-wrapper { padding: 1.75rem 1.5rem; }
    .page-title { font-size: 1.85rem; }
}
@media (max-width: 600px) {
    .content-wrapper { padding: 1.5rem 1rem; }
    .page-nav { flex-direction: column; }
    .page-nav-link { max-width: 100%; }
    .page-nav-link.next { margin-left: 0; }
    .card-grid, .technique-grid { grid-template-columns: 1fr; }
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1001;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    cursor: pointer;
    color: var(--text-primary);
}
.mobile-menu-toggle svg {
    width: 24px;
    height: 24px;
    display: block;
}
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
}
@media (max-width: 900px) {
    .mobile-menu-toggle { display: block; }
    .sidebar { z-index: 1000; }
    .sidebar.open + .mobile-overlay,
    .mobile-overlay.open { display: block; }
}

/* Mobile SVG/Illustration Fixes */
@media (max-width: 900px) {
    .illustration-body {
        padding: 1rem;
        min-height: 200px;
        overflow-x: auto;
    }
    .illustration-body svg {
        min-width: 600px;
        width: 100%;
        height: auto;
    }
    .illustration {
        margin: 1.5rem 0;
    }
}
@media (max-width: 600px) {
    .illustration-body {
        padding: 0.75rem;
        min-height: 150px;
    }
    .illustration-body svg {
        min-width: 500px;
    }
    .illustration-header {
        padding: 0.5rem 0.75rem;
        flex-direction: column;
        gap: 0.25rem;
        align-items: flex-start;
    }
    .illustration-title {
        font-size: 0.65rem;
    }
}

/* Force SVG visibility on mobile */
.illustration-body svg {
    display: block !important;
    visibility: visible !important;
    max-width: 100%;
    height: auto;
    min-height: 150px;
}
.illustration-body svg text {
    font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
}
.illustration-body svg [font-family*="Space"] {
    font-family: 'Space Grotesk', 'Inter', Arial, sans-serif;
}
.illustration-body svg [font-family*="JetBrains"],
.illustration-body svg [font-family*="Mono"] {
    font-family: 'JetBrains Mono', 'Courier New', monospace;
}