/* ==============================================================================
   vadde/DesignPatterns — Year 2500 Cosmic Liquid-Glass & Aero Mica Design System
   ============================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@500;600;700&family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&family=Orbitron:wght@600;800;900&family=Outfit:wght@600;700;800;900&family=Rajdhani:wght@600;700&display=swap');

/* ------------------------------------------------------------------------------
   1. COLOR PALETTES & THEME ENGINE
   ------------------------------------------------------------------------------ */

:root,
[data-theme="liquid"] {
  --bg-deep: #050813;
  --bg-subtle: #0a0f24;
  --bg-card: rgba(13, 20, 39, 0.65);
  --bg-card-hover: rgba(18, 28, 56, 0.75);
  --bg-card-border: rgba(255, 255, 255, 0.08);
  --bg-card-border-glow: rgba(0, 242, 254, 0.35);

  --accent-cyan: #00f2fe;
  --accent-violet: #a855f7;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-blue: #38bdf8;

  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-highlight: #ffffff;

  --halo-glow-1: rgba(0, 242, 254, 0.12);
  --halo-glow-2: rgba(168, 85, 247, 0.08);

  --topbar-bg: rgba(5, 8, 19, 0.75);
  --sidebar-bg: rgba(7, 12, 28, 0.82);
  --code-bg: rgba(3, 5, 12, 0.85);

  --scrollbar-thumb: rgba(255, 255, 255, 0.16);
  --scrollbar-thumb-hover: rgba(0, 242, 254, 0.5);
}

/* THEME 2: FLUENT AERO MICA (Crisp Light Frosted Paper) */
[data-theme="mica"] {
  --bg-deep: #f6f4ee;
  --bg-subtle: #eae6db;
  --bg-card: rgba(255, 255, 255, 0.82);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --bg-card-border: rgba(30, 41, 59, 0.12);
  --bg-card-border-glow: rgba(2, 132, 199, 0.45);

  --accent-cyan: #0284c7;
  --accent-violet: #7c3aed;
  --accent-emerald: #059669;
  --accent-amber: #d97706;
  --accent-rose: #e11d48;
  --accent-blue: #0284c7;

  --text-main: #0f172a;
  --text-muted: #334155;
  --text-dim: #64748b;
  --text-highlight: #020617;

  --halo-glow-1: rgba(2, 132, 199, 0.08);
  --halo-glow-2: rgba(124, 58, 237, 0.06);

  --topbar-bg: rgba(246, 244, 238, 0.82);
  --sidebar-bg: rgba(250, 249, 246, 0.9);
  --code-bg: rgba(255, 255, 255, 0.95);

  --scrollbar-thumb: rgba(30, 41, 59, 0.2);
  --scrollbar-thumb-hover: rgba(2, 132, 199, 0.5);
}

/* THEME 3: HOLO 2050 (Cyberpunk Terminal HUD) */
[data-theme="holo"] {
  --bg-deep: #03020a;
  --bg-subtle: #08061a;
  --bg-card: rgba(12, 10, 28, 0.75);
  --bg-card-hover: rgba(20, 16, 44, 0.88);
  --bg-card-border: rgba(77, 225, 255, 0.22);
  --bg-card-border-glow: #ffaa00;
  --glass-blur: blur(20px) saturate(220%);

  --accent-cyan: #4de1ff;
  --accent-violet: #ff4de1;
  --accent-emerald: #b2ff4d;
  --accent-amber: #ffaa00;
  --accent-rose: #ff2a6d;
  --accent-blue: #05d9e8;

  --text-main: #d8f4ff;
  --text-muted: #9ac8dd;
  --text-dim: #628ea4;
  --text-highlight: #ffffff;

  --halo-glow-1: rgba(77, 225, 255, 0.18);
  --halo-glow-2: rgba(255, 77, 225, 0.14);

  --topbar-bg: rgba(3, 2, 10, 0.85);
  --sidebar-bg: rgba(8, 6, 26, 0.88);
  --code-bg: rgba(5, 4, 18, 0.95);
  --code-border: rgba(77, 225, 255, 0.18);
  --badge-bg: rgba(255, 170, 0, 0.14);
  --badge-text: #ffaa00;

  --scrollbar-thumb: rgba(77, 225, 255, 0.25);
  --scrollbar-thumb-hover: #ffaa00;
}

/* THEME 4: MATRIX OBSIDIAN (Pure OLED Deep Emerald) */
[data-theme="matrix"] {
  --bg-deep: #000000;
  --bg-subtle: #030a04;
  --bg-card: rgba(5, 18, 8, 0.65);
  --bg-card-hover: rgba(8, 28, 12, 0.75);
  --bg-card-border: rgba(0, 255, 102, 0.12);
  --bg-card-border-glow: rgba(0, 255, 102, 0.4);

  --accent-cyan: #00ff66;
  --accent-violet: #10b981;
  --accent-emerald: #00ff66;
  --accent-amber: #84cc16;
  --accent-rose: #ef4444;
  --accent-blue: #22c55e;

  --text-main: #dcfce7;
  --text-muted: #86efac;
  --text-dim: #15803d;
  --text-highlight: #ffffff;

  --halo-glow-1: rgba(0, 255, 102, 0.1);
  --halo-glow-2: rgba(16, 185, 129, 0.06);

  --topbar-bg: rgba(0, 0, 0, 0.88);
  --sidebar-bg: rgba(2, 8, 3, 0.92);
  --code-bg: rgba(1, 10, 3, 0.9);

  --scrollbar-thumb: rgba(0, 255, 102, 0.2);
  --scrollbar-thumb-hover: rgba(0, 255, 102, 0.55);
}

/* Base Dimensions & Typography */
:root {
  --font-display: 'Outfit', 'Rajdhani', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Menlo, Consolas, monospace;
  --font-hud: 'Orbitron', 'Chakra Petch', sans-serif;
  --sidebar-width: 340px;
  --topbar-height: 64px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --shadow-glass: 0 16px 40px -10px rgba(0, 0, 0, 0.5), 0 0 1px 1px rgba(255, 255, 255, 0.08) inset;
  --t-fast: 160ms;
  --t-normal: 240ms;
}

/* ------------------------------------------------------------------------------
   2. GLOBAL RESET & STICKY-SAFE ROOT RULES
   ------------------------------------------------------------------------------ */

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

/* MANDATORY STICKY SCROLL INVARIANT:
   Never use 'overflow-x: hidden' on html or body.
   Always use 'overflow-x: clip' so that position: sticky is never broken! */
html,
body {
  overflow-x: clip;
  width: 100%;
  min-height: 100vh;
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* ------------------------------------------------------------------------------
   3. AMBIENT HALO LIGHTING ENGINE
   ------------------------------------------------------------------------------ */

.canvas-ambient-halo {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.halo-orb-pointer {
  position: absolute;
  top: var(--my, 20%);
  left: var(--mx, 30%);
  width: 500px;
  height: 500px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, var(--halo-glow-1) 0%, transparent 70%);
  filter: blur(50px);
  will-change: top, left;
  transition: opacity 0.3s ease;
}

.halo-orb-aurora {
  position: absolute;
  top: -10%;
  right: -5%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--halo-glow-2) 0%, transparent 75%);
  filter: blur(80px);
  animation: auroraFloat 18s ease-in-out infinite alternate;
}

@keyframes auroraFloat {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-40px, 30px) scale(1.08); }
  100% { transform: translate(30px, -20px) scale(0.95); }
}

/* ------------------------------------------------------------------------------
   4. TOPBAR & HEADER DECK
   ------------------------------------------------------------------------------ */

.header-glass {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--topbar-height);
  padding: 0 20px;
  background: var(--topbar-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--bg-card-border);
  gap: 16px;
}

.header-left-cluster {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 20px;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
}

.sidebar-dock-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--t-fast) ease;
}
.sidebar-dock-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}
.brand-logo-icon {
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.brand-text-group {
  display: flex;
  flex-direction: column;
}
.brand-title {
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand-subtitle {
  font-size: 0.68rem;
  color: var(--text-dim);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.header-telemetry-cluster {
  display: flex;
  align-items: center;
  gap: 10px;
}
.telemetry-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}
.telemetry-chip strong {
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}
.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.header-controls-cluster {
  display: flex;
  align-items: center;
  gap: 10px;
}
.hud-search-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--t-fast) ease;
}
.hud-search-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent-cyan);
  color: var(--text-main);
}
.kbd-shortcut {
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.theme-picker-group {
  display: inline-flex;
  padding: 3px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-full);
  gap: 2px;
}
.theme-pill-btn {
  padding: 4px 10px;
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  color: var(--text-dim);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--t-fast) ease;
}
.theme-pill-btn:hover {
  color: var(--text-main);
}
.theme-pill-btn.active {
  background: var(--accent-cyan);
  color: #040714;
  box-shadow: 0 0 10px var(--accent-cyan);
}

.hud-tool-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--t-fast) ease;
}
.hud-tool-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

/* ------------------------------------------------------------------------------
   5. LAYOUT ARCHITECTURE & SIDEBAR RESIZER
   ------------------------------------------------------------------------------ */

.layout-container {
  display: flex;
  position: relative;
  min-height: calc(100vh - var(--topbar-height));
  width: 100%;
  overflow-x: clip; /* Sticky safe! */
}

.floating-sidebar-toggle {
  display: none;
  position: fixed;
  top: calc(var(--topbar-height) + 14px);
  left: 14px;
  z-index: 990;
  width: 32px;
  height: 32px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--accent-cyan);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}
body.sidebar-collapsed .floating-sidebar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar {
  width: var(--sidebar-width);
  min-width: 240px;
  max-width: 560px;
  height: calc(100vh - var(--topbar-height));
  position: sticky;
  top: var(--topbar-height);
  background: var(--sidebar-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-right: 1px solid var(--bg-card-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: margin-left 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
  flex-shrink: 0;
}

body.sidebar-collapsed .sidebar {
  margin-left: calc(-1 * var(--sidebar-width));
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

body.sidebar-collapsed #sidebar-resizer {
  display: none;
}

.sidebar-search-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--bg-card-border);
}
.sidebar-search-box {
  flex: 1;
}
.sidebar-search-input {
  width: 100%;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  outline: none;
  transition: border-color var(--t-fast) ease;
}
.sidebar-search-input:focus {
  border-color: var(--accent-cyan);
}
.sidebar-close-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: transparent;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  cursor: pointer;
}
.sidebar-close-btn:hover {
  color: var(--text-main);
  border-color: var(--accent-cyan);
}

.tier-filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--bg-card-border);
}
.tier-chip {
  padding: 3px 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-full);
  color: var(--text-dim);
  font-size: 0.7rem;
  cursor: pointer;
  transition: all var(--t-fast) ease;
}
.tier-chip:hover {
  color: var(--text-main);
}
.tier-chip.active {
  background: rgba(0, 242, 254, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* Tree Controls Bar */
.tree-controls-bar {
  display: flex;
  gap: 6px;
  padding: 8px 12px;
  background: rgba(0, 0, 0, 0.15);
  border-bottom: 1px solid var(--bg-card-border);
}

.mini-tool-btn {
  flex: 1;
  padding: 5px 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--t-fast) ease;
  text-align: center;
}

.mini-tool-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
}

.sidebar-nav-tree {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

/* Nav Tree Groups (DSA 1:1 Standard) */
.nav-tree-group {
  display: flex;
  flex-direction: column;
  flex-shrink: 0 !important;
  min-height: fit-content !important;
  border-radius: var(--radius-sm);
  margin-bottom: 4px;
}

.nav-tree-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  min-height: 38px;
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  user-select: none;
  gap: 8px;
  transition: background-color var(--t-fast) ease;
}

.nav-tree-header:hover {
  background: rgba(255, 255, 255, 0.05);
}

.nav-tree-header.active-branch {
  border-left: 2px solid var(--accent-cyan);
  background: rgba(0, 242, 254, 0.06);
}

.tree-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.tree-chevron {
  font-size: 0.72rem;
  color: var(--text-dim);
  transition: transform 0.22s var(--ease-spring), color 0.2s ease;
  transform: rotate(0deg);
  flex-shrink: 0;
}

.nav-tree-group.expanded .tree-chevron {
  transform: rotate(90deg);
  color: var(--accent-cyan);
}

.tree-icon {
  font-size: 0.95rem;
  flex-shrink: 0;
}

.tree-title-text {
  font-family: var(--font-body);
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-main);
  white-space: normal;
  word-break: break-word;
  line-height: 1.35;
}

/* Distinct Nav Pill Badges */
.nav-pill {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-dim);
  border: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
  text-transform: uppercase;
  transition: all var(--t-fast) ease;
}

.nav-pill.pill-creational {
  color: #ffb84d;
  background: rgba(255, 184, 77, 0.12);
  border-color: rgba(255, 184, 77, 0.3);
}

.nav-pill.pill-structural {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.3);
}

.nav-pill.pill-behavioral {
  color: #c084fc;
  background: rgba(192, 132, 252, 0.12);
  border-color: rgba(192, 132, 252, 0.3);
}

.nav-pill.pill-architectural {
  color: #fb7185;
  background: rgba(251, 113, 133, 0.12);
  border-color: rgba(251, 113, 133, 0.3);
}

.nav-pill.pill-foundations {
  color: #34d399;
  background: rgba(52, 211, 153, 0.12);
  border-color: rgba(52, 211, 153, 0.3);
}

.nav-pill.pill-capstone {
  color: #60a5fa;
  background: rgba(96, 165, 250, 0.12);
  border-color: rgba(96, 165, 250, 0.3);
}

/* Nav Tree Children Links */
.nav-tree-children {
  display: none;
  flex-direction: column;
  padding-left: 20px;
  margin-top: 2px;
  margin-bottom: 4px;
  border-left: 1px dashed var(--bg-card-border);
  margin-left: 14px;
}

.nav-tree-group.expanded .nav-tree-children {
  display: flex;
}

.nav-tree-link {
  display: block;
  padding: 5px 8px;
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 4px;
  white-space: normal;
  word-break: break-word;
  line-height: 1.35;
  transition: all var(--t-fast) ease;
}

.nav-tree-link:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.nav-tree-link.active {
  color: var(--accent-cyan);
  font-weight: 600;
  background: var(--badge-bg);
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.82rem;
  transition: all var(--t-fast) ease;
  white-space: normal;
  word-break: break-word;
}
.sidebar-nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}
.sidebar-nav-item.active {
  background: rgba(0, 242, 254, 0.12);
  color: var(--accent-cyan);
  font-weight: 600;
  border-left: 2px solid var(--accent-cyan);
}
.nav-item-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  flex-shrink: 0;
}
.nav-item-title {
  flex: 1;
}
.nav-item-badge {
  font-size: 0.65rem;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 4px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Sidebar Resizer Separator */
.sidebar-resizer {
  width: 6px;
  background: transparent;
  cursor: col-resize;
  position: relative;
  z-index: 150;
  transition: background var(--t-fast) ease;
  flex-shrink: 0;
}
.sidebar-resizer:hover,
body.resizing-sidebar .sidebar-resizer {
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
}
body.resizing-sidebar {
  cursor: col-resize !important;
  user-select: none !important;
}

/* ------------------------------------------------------------------------------
   6. CONTENT AREA & HERO COMMAND DECK
   ------------------------------------------------------------------------------ */

.content-area {
  flex: 1;
  min-width: 0; /* Critical flex overflow containment */
  padding: 24px 32px 100px;
  position: relative;
  z-index: 10;
}

.hero-command-deck {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 40px;
}

.hero-glass-card {
  padding: 32px;
  background: var(--bg-card);
  backdrop-filter: blur(24px) saturate(190%);
  -webkit-backdrop-filter: blur(24px) saturate(190%);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
  position: relative;
  overflow: hidden;
}
.hero-glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), var(--accent-violet), transparent);
}

.hero-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.hero-pill-badge {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--bg-card-border);
  color: var(--text-muted);
}
.hero-pill-badge.badge-accent {
  background: rgba(0, 242, 254, 0.12);
  border-color: rgba(0, 242, 254, 0.4);
  color: var(--accent-cyan);
}
.hero-pill-badge.badge-emerald {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.4);
  color: var(--accent-emerald);
}

.hero-headline {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 14px;
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-cyan) 85%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-description {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 860px;
  line-height: 1.65;
  margin-bottom: 24px;
}

.hero-action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--t-fast) ease;
}
.hero-btn.primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  border: none;
  color: #040714;
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.35);
}
.hero-btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 26px rgba(0, 242, 254, 0.5);
}
.hero-btn.secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--bg-card-border);
  color: var(--text-main);
}
.hero-btn.secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
}

/* Pattern Finder & Decision Matrix HUD */
.pattern-finder-hud {
  margin-top: 24px;
  padding: 24px;
  background: rgba(4, 7, 18, 0.85);
  border: 1px solid var(--accent-cyan);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}
.finder-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.finder-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}
.finder-icon {
  font-size: 26px;
}
.finder-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-cyan);
}
.finder-subtitle {
  font-size: 0.82rem;
  color: var(--text-muted);
}
.finder-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
}
.finder-close-btn:hover {
  color: var(--text-main);
}
.finder-filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.filter-label {
  font-size: 0.8rem;
  color: var(--text-dim);
}
.framework-filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.framework-pill {
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--t-fast) ease;
}
.framework-pill.active {
  background: rgba(0, 242, 254, 0.2);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}
.finder-matrix-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  max-height: 400px;
  overflow-y: auto;
}
.finder-card {
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  color: inherit;
  transition: all var(--t-fast) ease;
}
.finder-card:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.06);
  transform: translateY(-2px);
}
.finder-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.finder-card-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
}
.finder-card-tier {
  font-size: 0.68rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-dim);
}
.finder-card-problem {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Master Diagram Card */
.hero-diagram-card {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
}
.diagram-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.diagram-title-cluster {
  display: flex;
  align-items: center;
  gap: 12px;
}
.diagram-heading {
  font-size: 0.95rem;
  font-weight: 700;
}

/* ------------------------------------------------------------------------------
   7. CHAPTER ACCORDION CARDS & MODERN CSS CONTENT-VISIBILITY
   ------------------------------------------------------------------------------ */

/* Reading Controls Toolbar (Expand / Collapse & Focus Accordion - 1:1 DSA Standard) */
.reading-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--bg-card-border);
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.mode-toggles-cluster {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mode-btn {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bg-card-border);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--t-fast) ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.mode-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border-color: var(--bg-card-border-glow);
}

.mode-btn.active {
  background: rgba(0, 242, 254, 0.14);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  font-weight: 600;
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.3);
}

[data-theme="mica"] .mode-btn.active {
  background: rgba(14, 165, 233, 0.16);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  box-shadow: 0 0 10px rgba(14, 165, 233, 0.25);
}

[data-theme="holo"] .mode-btn.active {
  background: rgba(255, 170, 0, 0.18);
  border-color: var(--accent-amber);
  color: var(--accent-amber);
  box-shadow: 0 0 10px rgba(255, 170, 0, 0.35);
}

[data-theme="matrix"] .mode-btn.active {
  background: rgba(0, 255, 102, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(0, 255, 102, 0.3);
}

.chapters-container {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* Modern CSS defer-rendering for off-screen cards */
.pattern-chapter {
  content-visibility: auto;
  contain-intrinsic-size: auto none auto 600px;
  background: var(--bg-card);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
  overflow: hidden;
  transition: border-color var(--t-fast) ease, box-shadow var(--t-fast) ease;
}
.pattern-chapter:first-of-type {
  content-visibility: visible;
}
.pattern-chapter:hover {
  border-color: var(--bg-card-border-glow);
}

.chapter-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 28px;
  cursor: pointer;
  user-select: none;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid transparent;
  transition: background-color var(--t-fast) ease;
  gap: 16px;
}

.pattern-chapter:not(.is-collapsed) .chapter-header-bar {
  border-bottom-color: var(--bg-card-border);
  background: rgba(0, 0, 0, 0.2);
}

.chapter-header-bar:hover {
  background: rgba(255, 255, 255, 0.05);
}

.chapter-header-left {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
  min-width: 0;
}

.chapter-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  letter-spacing: -0.01em;
  color: var(--text-main);
  margin: 0;
}

.chapter-header-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.chapter-toggle-btn {
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--bg-card-border);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  pointer-events: none; /* Inherits click from header */
  transition: all var(--t-fast) ease;
}

.chapter-header-bar:hover .chapter-toggle-btn {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

/* Chevrons */
.chapter-chevron,
.problem-chevron,
.tree-chevron {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--text-dim);
  transition: transform 0.22s var(--ease-spring), color 0.2s ease;
  transform: rotate(0deg);
  flex-shrink: 0;
}

/* Rotate down ▼ when open */
.pattern-chapter:not(.is-collapsed) .chapter-chevron {
  transform: rotate(90deg);
  color: var(--accent-cyan);
}

/* Collapsible Content Body */
.chapter-content-body {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 28px;
}

.pattern-chapter.is-collapsed .chapter-content-body {
  display: none !important;
}

/* Hero Tag Badges */
.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
}

.hero-tag.tag-creational {
  color: #ffb84d;
  background: rgba(255, 184, 77, 0.12);
  border-color: rgba(255, 184, 77, 0.3);
}
.hero-tag.tag-structural {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.3);
}
.hero-tag.tag-behavioral {
  color: #c084fc;
  background: rgba(192, 132, 252, 0.12);
  border-color: rgba(192, 132, 252, 0.3);
}
.hero-tag.tag-architectural {
  color: #fb7185;
  background: rgba(251, 113, 133, 0.12);
  border-color: rgba(251, 113, 133, 0.3);
}
.hero-tag.tag-foundations {
  color: #34d399;
  background: rgba(52, 211, 153, 0.12);
  border-color: rgba(52, 211, 153, 0.3);
}
.hero-tag.tag-capstone {
  color: #60a5fa;
  background: rgba(96, 165, 250, 0.12);
  border-color: rgba(96, 165, 250, 0.3);
}

/* Legacy fallback classes */
.chapter-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  user-select: none;
}
.chapter-body {
  padding: 28px 32px 36px;
  display: block;
}
.pattern-chapter.is-collapsed .chapter-body {
  display: none !important;
}

/* ------------------------------------------------------------------------------
   8. TYPOGRAPHY & MARKDOWN RENDERING
   ------------------------------------------------------------------------------ */

.md-h1 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--text-highlight);
}
.md-h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 32px 0 16px;
  color: var(--accent-cyan);
  border-bottom: 1px solid var(--bg-card-border);
  padding-bottom: 8px;
}
.md-h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 24px 0 12px;
  color: var(--text-main);
}
.md-h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 16px 0 8px;
  color: var(--text-muted);
}
.md-p {
  margin-bottom: 14px;
  line-height: 1.65;
  color: var(--text-main);
}
.md-ul, .md-ol {
  margin: 12px 0 18px 24px;
  color: var(--text-main);
}
.md-ul li, .md-ol li {
  margin-bottom: 6px;
  line-height: 1.6;
}
.md-blockquote {
  border-left: 3px solid var(--accent-cyan);
  padding: 12px 18px;
  margin: 16px 0;
  background: rgba(0, 242, 254, 0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-main);
  font-style: italic;
}
.md-hr {
  border: none;
  height: 1px;
  background: var(--bg-card-border);
  margin: 32px 0;
}
.inline-code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  color: var(--accent-cyan);
}
.md-link {
  color: var(--accent-cyan);
  text-decoration: none;
  border-bottom: 1px dashed rgba(0, 242, 254, 0.4);
  transition: all var(--t-fast) ease;
}
.md-link:hover {
  color: #ffffff;
  border-bottom-color: var(--accent-cyan);
}

/* ------------------------------------------------------------------------------
   9. TABLES & TOUCH CONTAINMENT INVARIANTS
   ------------------------------------------------------------------------------ */

.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 18px 0;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.2);
}
.md-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px; /* Invariant: Touch containment */
  font-size: 0.84rem;
}
.md-table th {
  background: rgba(255, 255, 255, 0.04);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  color: var(--accent-cyan);
  border-bottom: 1px solid var(--bg-card-border);
}
.md-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--bg-card-border);
  color: var(--text-main);
}
.md-table tr:last-child td {
  border-bottom: none;
}
.md-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* ------------------------------------------------------------------------------
   10. COLLAPSIBLE DETAILS (.md-details & .md-summary)
   ------------------------------------------------------------------------------ */

.md-details {
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  margin: 16px 0;
  background: rgba(0, 0, 0, 0.25);
  overflow: hidden;
  transition: border-color var(--t-fast) ease;
}
.md-details[open] {
  border-color: var(--accent-cyan);
}
.md-summary {
  padding: 12px 18px;
  cursor: pointer;
  font-weight: 600;
  color: var(--accent-cyan);
  user-select: none;
  background: rgba(255, 255, 255, 0.02);
  transition: background var(--t-fast) ease;
}
.md-summary:hover {
  background: rgba(0, 242, 254, 0.08);
}
.md-details-body {
  padding: 18px;
  border-top: 1px solid var(--bg-card-border);
}

/* ------------------------------------------------------------------------------
   11. MERMAID DIAGRAMS & SAFARI WEBKIT SIZING INVARIANTS
   ------------------------------------------------------------------------------ */

.canvas-container {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--bg-card-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin: 20px 0;
}

.canvas-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--bg-card-border);
  gap: 12px;
}

.canvas-type-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.canvas-controls-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.canvas-tool-btn {
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--bg-card-border);
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--t-fast) ease;
}

.canvas-tool-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent-cyan);
}

.zoom-level-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  min-width: 44px;
  text-align: center;
}

.canvas-viewport {
  overflow: auto;
  padding: 28px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 240px;
  max-height: 640px;
  cursor: grab;
  user-select: none;
}

.canvas-viewport:active {
  cursor: grabbing;
}

.canvas-content-surface {
  transform-origin: center center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: auto;
  will-change: transform;
}

.canvas-content-surface svg {
  display: block;
  max-width: 100%;
  height: auto !important;
}

.canvas-caption {
  padding: 8px 16px;
  background: rgba(0, 0, 0, 0.15);
  border-top: 1px solid var(--bg-card-border);
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  text-align: center;
}

/* Legacy alias support */
.mermaid-workbench {
  margin: 20px 0;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  overflow: hidden;
}
.mermaid-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--bg-card-border);
}
.mermaid-container {
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 120px;
  overflow-x: auto;
}

/* MANDATORY SAFARI WEBKIT FLEX-SVG SIZING INVARIANT:
   Never use 'width: auto !important' on .mermaid svg inside flex containers. */
.mermaid svg {
  display: block !important;
  width: 100% !important;
  max-width: 100% !important;
  height: auto !important;
  max-height: 580px !important;
  object-fit: contain;
  margin: 0 auto;
}

/* ------------------------------------------------------------------------------
   11b. MERMAID HIGH-CONTRAST THEMING & ZERO-TRUNCATION ENGINE
   ------------------------------------------------------------------------------ */
.mermaid,
.mermaid svg,
.theater-content-surface,
.theater-content-surface svg {
  color: var(--text-main);
  font-family: var(--font-body);
}

/* Dynamic Box Sizing & Universal Text Overflow Containment */
.mermaid svg text,
.mermaid svg tspan,
.theater-content-surface svg text,
.theater-content-surface svg tspan {
  font-family: var(--font-body) !important;
  overflow: visible !important;
}

.mermaid svg foreignObject,
.theater-content-surface svg foreignObject {
  overflow: visible !important;
}

.mermaid svg foreignObject div,
.theater-content-surface svg foreignObject div {
  display: inline-block !important;
  text-align: center !important;
  box-sizing: border-box !important;
  padding: 0 !important;
  margin: 0 !important;
  line-height: normal !important;
}

/* Flowchart & Architecture Nodes */
.mermaid svg .node rect,
.mermaid svg .node circle,
.mermaid svg .node ellipse,
.mermaid svg .node polygon,
.mermaid svg .node path,
.theater-content-surface svg .node rect,
.theater-content-surface svg .node circle,
.theater-content-surface svg .node ellipse,
.theater-content-surface svg .node polygon,
.theater-content-surface svg .node path {
  stroke-width: 1.5px !important;
  rx: 8px !important;
  ry: 8px !important;
  transition: all var(--t-fast) ease;
}

/* Flowchart Node Text */
.mermaid svg .node .label,
.mermaid svg .node text,
.mermaid svg .node span,
.theater-content-surface svg .node .label,
.theater-content-surface svg .node text,
.theater-content-surface svg .node span {
  fill: var(--text-main) !important;
  color: var(--text-main) !important;
  font-weight: 500 !important;
  font-size: 14px !important;
}

/* Subgraph Clusters (Component Boundaries) */
.mermaid svg .cluster rect,
.theater-content-surface svg .cluster rect {
  fill: rgba(10, 16, 32, 0.65) !important;
  stroke: rgba(255, 255, 255, 0.15) !important;
  stroke-width: 1px !important;
  stroke-dasharray: 4 4;
  rx: 12px !important;
}

.mermaid svg .cluster text,
.mermaid svg .cluster span,
.theater-content-surface svg .cluster text,
.theater-content-surface svg .cluster span {
  fill: var(--accent-cyan) !important;
  color: var(--accent-cyan) !important;
  font-weight: 600 !important;
  font-size: 13px !important;
  text-transform: none !important;
  letter-spacing: normal !important;
}

/* Edge Labels & Connectors */
.mermaid svg .edgeLabel,
.theater-content-surface svg .edgeLabel {
  background-color: var(--bg-card) !important;
  border-radius: var(--radius-sm);
}

.mermaid svg .edgeLabel rect,
.theater-content-surface svg .edgeLabel rect {
  fill: var(--bg-deep) !important;
  opacity: 0.9;
  rx: 4px;
}

.mermaid svg .edgeLabel text,
.mermaid svg .edgeLabel span,
.theater-content-surface svg .edgeLabel text,
.theater-content-surface svg .edgeLabel span {
  fill: var(--text-muted) !important;
  color: var(--text-muted) !important;
  font-size: 0.78rem !important;
  font-family: var(--font-mono) !important;
}

.mermaid svg .flowchart-link,
.mermaid svg path.path,
.theater-content-surface svg .flowchart-link,
.theater-content-surface svg path.path {
  stroke: rgba(148, 163, 184, 0.6) !important;
  stroke-width: 1.5px !important;
}

/* UML Class Diagrams */
.mermaid svg g.classGroup rect,
.theater-content-surface svg g.classGroup rect {
  fill: var(--bg-card) !important;
  stroke: var(--bg-card-border-glow) !important;
  stroke-width: 1.5px !important;
  rx: 6px;
}

.mermaid svg g.classGroup text,
.theater-content-surface svg g.classGroup text {
  fill: var(--text-main) !important;
  color: var(--text-main) !important;
  font-size: 0.82rem !important;
}

/* Mindmap Theming (Eliminates Black-on-Black Contrast Failure) */
.mermaid svg .mindmap-node text,
.mermaid svg .mindmap-node tspan,
.theater-content-surface svg .mindmap-node text,
.theater-content-surface svg .mindmap-node tspan {
  fill: #ffffff !important;
  color: #ffffff !important;
  font-weight: 600 !important;
  font-size: 0.88rem !important;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8) !important;
}

/* Mindmap Root Node */
.mermaid svg .mindmap-node.section-root rect,
.mermaid svg .mindmap-node.section-root circle,
.theater-content-surface svg .mindmap-node.section-root rect,
.theater-content-surface svg .mindmap-node.section-root circle {
  fill: #0ea5e9 !important;
  stroke: #38bdf8 !important;
  stroke-width: 2.5px !important;
}

/* Mindmap Section Nodes (Vibrant Jewels with White Text) */
.mermaid svg .mindmap-node.section-0 rect,
.mermaid svg .mindmap-node.section-0 path,
.theater-content-surface svg .mindmap-node.section-0 rect,
.theater-content-surface svg .mindmap-node.section-0 path {
  fill: #0284c7 !important;
  stroke: #38bdf8 !important;
}

.mermaid svg .mindmap-node.section-1 rect,
.mermaid svg .mindmap-node.section-1 path,
.theater-content-surface svg .mindmap-node.section-1 rect,
.theater-content-surface svg .mindmap-node.section-1 path {
  fill: #7c3aed !important;
  stroke: #a855f7 !important;
}

.mermaid svg .mindmap-node.section-2 rect,
.mermaid svg .mindmap-node.section-2 path,
.theater-content-surface svg .mindmap-node.section-2 rect,
.theater-content-surface svg .mindmap-node.section-2 path {
  fill: #059669 !important;
  stroke: #34d399 !important;
}

.mermaid svg .mindmap-node.section-3 rect,
.mermaid svg .mindmap-node.section-3 path,
.theater-content-surface svg .mindmap-node.section-3 rect,
.theater-content-surface svg .mindmap-node.section-3 path {
  fill: #d97706 !important;
  stroke: #fbbf24 !important;
}

.mermaid svg .mindmap-node.section-4 rect,
.mermaid svg .mindmap-node.section-4 path,
.theater-content-surface svg .mindmap-node.section-4 rect,
.theater-content-surface svg .mindmap-node.section-4 path {
  fill: #e11d48 !important;
  stroke: #fb7185 !important;
}

/* Mindmap Edges */
.mermaid svg path.section-edge-0, .theater-content-surface svg path.section-edge-0 { stroke: #38bdf8 !important; stroke-width: 2px !important; }
.mermaid svg path.section-edge-1, .theater-content-surface svg path.section-edge-1 { stroke: #a855f7 !important; stroke-width: 2px !important; }
.mermaid svg path.section-edge-2, .theater-content-surface svg path.section-edge-2 { stroke: #34d399 !important; stroke-width: 2px !important; }
.mermaid svg path.section-edge-3, .theater-content-surface svg path.section-edge-3 { stroke: #fbbf24 !important; stroke-width: 2px !important; }
.mermaid svg path.section-edge-4, .theater-content-surface svg path.section-edge-4 { stroke: #fb7185 !important; stroke-width: 2px !important; }

/* THEME OVERRIDES FOR AERO MICA (HIGH CONTRAST ON BRIGHT FROSTED SURFACE) */
[data-theme="mica"] .mermaid svg .node rect,
[data-theme="mica"] .mermaid svg .node circle,
[data-theme="mica"] .mermaid svg .node polygon,
[data-theme="mica"] .mermaid svg .node path,
[data-theme="mica"] .theater-content-surface svg .node rect,
[data-theme="mica"] .theater-content-surface svg .node circle,
[data-theme="mica"] .theater-content-surface svg .node polygon,
[data-theme="mica"] .theater-content-surface svg .node path {
  fill: #ffffff !important;
  stroke: rgba(14, 165, 233, 0.45) !important;
}

[data-theme="mica"] .mermaid svg .node .label,
[data-theme="mica"] .mermaid svg .node text,
[data-theme="mica"] .mermaid svg .node span,
[data-theme="mica"] .theater-content-surface svg .node .label,
[data-theme="mica"] .theater-content-surface svg .node text,
[data-theme="mica"] .theater-content-surface svg .node span {
  fill: #0f172a !important;
  color: #0f172a !important;
}

[data-theme="mica"] .mermaid svg .cluster rect,
[data-theme="mica"] .theater-content-surface svg .cluster rect {
  fill: rgba(241, 245, 249, 0.85) !important;
  stroke: rgba(15, 23, 42, 0.22) !important;
}

[data-theme="mica"] .mermaid svg .cluster text,
[data-theme="mica"] .mermaid svg .cluster span,
[data-theme="mica"] .theater-content-surface svg .cluster text,
[data-theme="mica"] .theater-content-surface svg .cluster span {
  fill: #0284c7 !important;
  color: #0284c7 !important;
}

[data-theme="mica"] .mermaid svg g.classGroup rect,
[data-theme="mica"] .theater-content-surface svg g.classGroup rect {
  fill: #ffffff !important;
  stroke: rgba(14, 165, 233, 0.45) !important;
}

[data-theme="mica"] .mermaid svg g.classGroup text,
[data-theme="mica"] .theater-content-surface svg g.classGroup text {
  fill: #0f172a !important;
  color: #0f172a !important;
}

/* Mica Mindmap Theming (Pastel Jewel Cards with High-Contrast Dark Text) */
[data-theme="mica"] .mermaid svg .mindmap-node.section-root rect,
[data-theme="mica"] .mermaid svg .mindmap-node.section-root circle,
[data-theme="mica"] .theater-content-surface svg .mindmap-node.section-root rect,
[data-theme="mica"] .theater-content-surface svg .mindmap-node.section-root circle {
  fill: #e0f2fe !important;
  stroke: #0284c7 !important;
}

[data-theme="mica"] .mermaid svg .mindmap-node.section-0 rect,
[data-theme="mica"] .mermaid svg .mindmap-node.section-0 path,
[data-theme="mica"] .theater-content-surface svg .mindmap-node.section-0 rect,
[data-theme="mica"] .theater-content-surface svg .mindmap-node.section-0 path {
  fill: #bae6fd !important;
  stroke: #0284c7 !important;
}

[data-theme="mica"] .mermaid svg .mindmap-node.section-1 rect,
[data-theme="mica"] .mermaid svg .mindmap-node.section-1 path,
[data-theme="mica"] .theater-content-surface svg .mindmap-node.section-1 rect,
[data-theme="mica"] .theater-content-surface svg .mindmap-node.section-1 path {
  fill: #ede9fe !important;
  stroke: #7c3aed !important;
}

[data-theme="mica"] .mermaid svg .mindmap-node.section-2 rect,
[data-theme="mica"] .mermaid svg .mindmap-node.section-2 path,
[data-theme="mica"] .theater-content-surface svg .mindmap-node.section-2 rect,
[data-theme="mica"] .theater-content-surface svg .mindmap-node.section-2 path {
  fill: #d1fae5 !important;
  stroke: #059669 !important;
}

[data-theme="mica"] .mermaid svg .mindmap-node.section-3 rect,
[data-theme="mica"] .mermaid svg .mindmap-node.section-3 path,
[data-theme="mica"] .theater-content-surface svg .mindmap-node.section-3 rect,
[data-theme="mica"] .theater-content-surface svg .mindmap-node.section-3 path {
  fill: #fef3c7 !important;
  stroke: #d97706 !important;
}

[data-theme="mica"] .mermaid svg .mindmap-node.section-4 rect,
[data-theme="mica"] .mermaid svg .mindmap-node.section-4 path,
[data-theme="mica"] .theater-content-surface svg .mindmap-node.section-4 rect,
[data-theme="mica"] .theater-content-surface svg .mindmap-node.section-4 path {
  fill: #ffe4e6 !important;
  stroke: #e11d48 !important;
}

[data-theme="mica"] .mermaid svg .mindmap-node text,
[data-theme="mica"] .mermaid svg .mindmap-node tspan,
[data-theme="mica"] .theater-content-surface svg .mindmap-node text,
[data-theme="mica"] .theater-content-surface svg .mindmap-node tspan {
  fill: #0f172a !important;
  color: #0f172a !important;
  font-weight: 600 !important;
  text-shadow: none !important;
}

/* THEME OVERRIDES FOR CYBERPUNK HOLO */
[data-theme="holo"] .mermaid svg .cluster text,
[data-theme="holo"] .theater-content-surface svg .cluster text {
  fill: #ffaa00 !important;
  color: #ffaa00 !important;
}

/* THEME OVERRIDES FOR OBSIDIAN MATRIX */
[data-theme="matrix"] .mermaid svg .cluster text,
[data-theme="matrix"] .theater-content-surface svg .cluster text {
  fill: #00ff66 !important;
  color: #00ff66 !important;
}

/* ------------------------------------------------------------------------------
   12. CODE CONTAINERS & INTERACTIVE PYTHON EXAMPLES
   ------------------------------------------------------------------------------ */

.code-container {
  margin: 16px 0;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  background: var(--code-bg);
  overflow: hidden;
}
.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--bg-card-border);
}
.code-container pre,
.example-card pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--text-main);
}
.code-container code,
.example-card code {
  font-family: inherit;
  color: inherit;
}

.copy-btn {
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--bg-card-border);
  border-radius: 4px;
  color: var(--text-muted);
  font-size: 0.72rem;
  cursor: pointer;
  transition: all var(--t-fast) ease;
}
.copy-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}
.copy-btn.copied {
  background: var(--accent-emerald);
  color: #040714;
  border-color: var(--accent-emerald);
}

/* Python Implementation Examples Section */
.chapter-examples-section {
  margin-top: 36px;
  border-top: 1px solid var(--bg-card-border);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.section-subheading {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.example-card {
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  background: var(--code-bg);
  overflow: hidden;
}
.example-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--bg-card-border);
  flex-wrap: wrap;
  gap: 10px;
}
.example-title-cluster {
  display: flex;
  align-items: center;
  gap: 10px;
}
.example-filename {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
}
.example-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
}
.example-meta-cluster {
  display: flex;
  align-items: center;
  gap: 8px;
}
.example-lines {
  font-size: 0.72rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.example-meta-bar {
  padding: 10px 18px;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--bg-card-border);
  font-size: 0.82rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.meta-scenario strong,
.meta-insight strong {
  color: var(--accent-cyan);
}

/* ------------------------------------------------------------------------------
   13. SEMANTIC BADGES (.dna-label)
   ------------------------------------------------------------------------------ */

.dna-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--bg-card-border);
}
.dna-label-code {
  color: var(--accent-cyan);
  border-color: rgba(0, 242, 254, 0.3);
  background: rgba(0, 242, 254, 0.08);
}
.dna-label-django {
  color: #2ba674;
  border-color: rgba(43, 166, 116, 0.3);
  background: rgba(43, 166, 116, 0.08);
}
.dna-label-fastapi {
  color: #05998b;
  border-color: rgba(5, 153, 139, 0.3);
  background: rgba(5, 153, 139, 0.08);
}
.dna-label-sqlalchemy {
  color: #e25555;
  border-color: rgba(226, 85, 85, 0.3);
  background: rgba(226, 85, 85, 0.08);
}
.dna-label-celery {
  color: #a4ce3a;
  border-color: rgba(164, 206, 58, 0.3);
  background: rgba(164, 206, 58, 0.08);
}
.dna-label-matrix {
  color: var(--accent-amber);
  border-color: rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.08);
}
.dna-label-tree {
  color: var(--accent-emerald);
  border-color: rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.08);
}
.dna-label-spec,
.dna-label-blueprint {
  color: var(--accent-violet);
  border-color: rgba(168, 85, 247, 0.3);
  background: rgba(168, 85, 247, 0.08);
}

/* ------------------------------------------------------------------------------
   14. FULLSCREEN THEATER MODE WORKBENCH (<dialog>)
   ------------------------------------------------------------------------------ */

#theater-modal,
.theater-modal,
.theater-dialog {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  max-width: 100vw;
  max-height: 100vh;
  margin: 0;
  padding: 0;
  border: none;
  background: rgba(5, 8, 19, 0.96);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  z-index: 999999;
  display: none;
  flex-direction: column;
  overscroll-behavior: contain;
}

dialog#theater-modal[open],
dialog.theater-modal[open],
dialog.theater-dialog[open] {
  display: flex;
}

dialog#theater-modal::backdrop,
dialog.theater-modal::backdrop,
dialog.theater-dialog::backdrop {
  background: rgba(3, 5, 12, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow: hidden;
  overscroll-behavior: contain;
  cursor: pointer;
}

body.theater-open {
  overflow: hidden !important;
}

.theater-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  background: rgba(10, 15, 30, 0.94);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  gap: 16px;
  flex-shrink: 0;
  z-index: 10;
}

.theater-title-cluster {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theater-icon {
  font-size: 1.3rem;
}

.theater-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: #f8fafc !important;
  margin: 0;
  letter-spacing: -0.01em;
}

.theater-controls-cluster {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theater-tool-btn {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  background: rgba(30, 41, 59, 0.95);
  border: 1px solid rgba(148, 163, 184, 0.3);
  color: #f1f5f9;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--t-fast) ease;
}

.theater-tool-btn:hover {
  background: rgba(51, 65, 85, 0.98);
  border-color: var(--accent-cyan);
  color: #ffffff;
}

.theater-close-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(244, 63, 94, 0.15) !important;
  border: 1px solid rgba(244, 63, 94, 0.45) !important;
  color: #fda4af !important;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  margin-left: 10px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--t-fast) cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.theater-close-btn:hover {
  background: rgba(244, 63, 94, 0.35) !important;
  border-color: #fb7185 !important;
  color: #ffffff !important;
  box-shadow: 0 0 20px rgba(244, 63, 94, 0.55), 0 4px 14px rgba(0, 0, 0, 0.4);
  transform: translateY(-1px);
}

.theater-close-btn:active {
  transform: translateY(0);
}

.close-icon-svg {
  flex-shrink: 0;
  transition: transform 0.22s ease;
}

.theater-close-btn:hover .close-icon-svg {
  transform: rotate(90deg);
}

.close-kbd-badge {
  display: inline-flex;
  align-items: center;
  padding: 1px 5px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(244, 63, 94, 0.3);
  border-radius: 4px;
  color: #fecdd3;
  line-height: 1.2;
}

[data-theme="mica"] .theater-close-btn {
  background: rgba(225, 29, 72, 0.1) !important;
  border-color: rgba(225, 29, 72, 0.35) !important;
  color: #e11d48 !important;
}

[data-theme="mica"] .theater-close-btn:hover {
  background: #e11d48 !important;
  color: #ffffff !important;
  border-color: #be123c !important;
  box-shadow: 0 0 16px rgba(225, 29, 72, 0.4);
}

[data-theme="mica"] .close-kbd-badge {
  background: rgba(255, 255, 255, 0.85);
  color: #9f1239;
  border-color: rgba(225, 29, 72, 0.25);
}

.theater-viewport {
  flex: 1;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  padding: 24px;
}

.theater-viewport:active {
  cursor: grabbing;
}

.theater-content-surface {
  transform-origin: center center;
  transition: none !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: auto;
  border-radius: var(--radius-md);
  will-change: transform;
}

.theater-content-surface svg {
  display: block !important;
  max-width: none !important;
  max-height: none !important;
  overflow: visible !important;
}

.theater-content-surface svg text,
.theater-content-surface svg foreignObject,
.theater-content-surface svg span {
  user-select: text !important;
  -webkit-user-select: text !important;
}

/* ------------------------------------------------------------------------------
   15. GLOBAL SEARCH MODAL HUD (<dialog>)
   ------------------------------------------------------------------------------ */

.search-modal {
  width: 90vw;
  max-width: 680px;
  margin: 12vh auto auto;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  background: var(--bg-deep);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8), 0 0 1px 1px var(--bg-card-border);
  padding: 0;
  display: none;
  z-index: 2100;
  overscroll-behavior: contain;
}
.search-modal[open] {
  display: block;
}
.search-modal::backdrop {
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.search-card {
  padding: 20px;
}
.search-input-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
}
.search-input-icon {
  color: var(--accent-cyan);
}
.search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 1rem;
}
.search-kbd-esc {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  color: var(--text-dim);
}

.search-filter-pills {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  overflow-x: auto;
}
.search-pill {
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-full);
  color: var(--text-dim);
  font-size: 0.74rem;
  cursor: pointer;
  white-space: nowrap;
}
.search-pill.active {
  background: rgba(0, 242, 254, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.search-results-list {
  max-height: 380px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.search-result-item {
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all var(--t-fast) ease;
}
.search-result-item:hover,
.search-result-item.selected {
  background: rgba(0, 242, 254, 0.08);
  border-color: var(--accent-cyan);
}
.search-result-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.search-result-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-cyan);
}
.search-result-badge {
  font-size: 0.68rem;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 4px;
  color: var(--text-dim);
}
.search-result-snippet {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.search-empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-dim);
  font-size: 0.88rem;
}

/* ------------------------------------------------------------------------------
   16. AERO MICA CONTRAST INVARIANTS (Explicit Fix for Past Contrast Trap)
   ------------------------------------------------------------------------------ */

[data-theme="mica"] .dna-skeleton-box,
[data-theme="mica"] .code-container,
[data-theme="mica"] .example-card {
  background: rgba(255, 255, 255, 0.95) !important;
  border-color: rgba(30, 41, 59, 0.18) !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06) !important;
}

[data-theme="mica"] .code-container pre,
[data-theme="mica"] .code-container code,
[data-theme="mica"] .example-card pre,
[data-theme="mica"] .example-card code {
  color: #0f172a !important;
}

[data-theme="mica"] .theater-tool-btn {
  background: rgba(255, 255, 255, 0.22) !important;
  border: 1px solid rgba(255, 255, 255, 0.55) !important;
  color: #ffffff !important;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.2) !important;
}

[data-theme="mica"] .hero-headline {
  background: linear-gradient(135deg, #0f172a 40%, var(--accent-blue) 85%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="mica"] .md-summary {
  background: rgba(241, 245, 249, 0.8);
  color: #0284c7;
}

/* ------------------------------------------------------------------------------
   17. FLASH FOCUS & ANIMATIONS
   ------------------------------------------------------------------------------ */

@keyframes flashFocusPulse {
  0% { outline: 3px solid var(--accent-cyan); box-shadow: 0 0 30px var(--accent-cyan); }
  50% { outline: 3px solid var(--accent-violet); box-shadow: 0 0 40px var(--accent-violet); }
  100% { outline: 1px solid transparent; box-shadow: none; }
}

.flash-focus {
  animation: flashFocusPulse 1.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ------------------------------------------------------------------------------
   18. COMMUTE GADGET RESPONSIVE MOBILE DRAWER (<= 1024px)
   ------------------------------------------------------------------------------ */

@media (max-width: 1024px) {
  .mobile-nav-toggle {
    display: block;
  }
  .sidebar-dock-toggle {
    display: none;
  }
  .floating-sidebar-toggle {
    display: none !important;
  }

  .sidebar {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    bottom: 0;
    height: calc(100vh - var(--topbar-height));
    width: min(86vw, 360px);
    z-index: 1200;
    transform: translateX(-100%);
    transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  }
  body.mobile-drawer-open .sidebar {
    transform: translateX(0);
  }

  .mobile-drawer-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
  }
  body.mobile-drawer-open .mobile-drawer-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .sidebar-resizer {
    display: none !important;
  }

  .content-area {
    padding: 16px 18px 80px;
  }
  .hero-glass-card {
    padding: 20px;
  }
  .hero-headline {
    font-size: 1.6rem;
  }
  .header-telemetry-cluster {
    display: none;
  }
}