/* Hallmark: dark-neobrutalism | critique: high-contrast tactile ed-tech platform with authentic learning documents */
/* ==========================================================================
   TKAORA v2.5 — CRAFTED DARK NEOBRUTALISM DESIGN SYSTEM
   Original Code & Documents by HMMODZ | Developed Further by rhmt ofc
   Validated with Hallmark & UI-UX-Kit standards (High Craft Ed-Tech Platform)
   ========================================================================== */

:root {
  /* Typography Scale */
  --font-display: 'Bricolage Grotesque', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Mixed OKLCH & Deep Tinted Inks (Avoiding default AI swatches) */
  --color-black: #05080e;
  --color-black-pure: #030509;
  --color-white: #f7fafc;
  --color-pure-white: #ffffff;
  --color-white-tint: #eaf0f8;
  
  --bg-page: #080c14;
  --bg-surface: #0e1422;
  --bg-surface-elevated: #151d30;
  --bg-card: #111726;
  --bg-card-hover: #182238;
  --bg-subtle: #1a253c;

  --canvas-dot: rgba(255, 255, 255, 0.08);
  --canvas-dot-light: rgba(0, 0, 0, 0.12);
  --shadow-sidebar: rgba(0, 0, 0, 0.45);
  --shadow-topbar: rgba(0, 0, 0, 0.35);
  --backdrop-modal: rgba(3, 5, 9, 0.9);
  
  --card-dark-front: #101624;
  --card-dark-back: #1b2438;
  --jebakan-bg: rgba(255, 42, 109, 0.16);
  --tip-bg: rgba(5, 255, 161, 0.16);
  --nav-active-bg: rgba(255, 230, 0, 0.08);
  
  /* Text & Inks */
  --ink: #f7fafc;
  --ink-secondary: #cbd5e1;
  --muted: #94a3b8;
  --muted-dark: #64748b;

  /* Thick Brutalist Borders */
  --border-width: 2.5px;
  --border-color: var(--color-black);
  --border-line: #222d42;
  --border-glow: #384869;

  /* Hard Offset Drop Shadows (Zero-Blur Neobrutalism) */
  --shadow-offset-xs: 1px 1px 0px var(--color-black);
  --shadow-offset-sm: 2px 2px 0px var(--color-black);
  --shadow-offset: 4px 4px 0px var(--color-black);
  --shadow-offset-hover: 6px 6px 0px var(--color-black);
  --shadow-offset-active: 1px 1px 0px var(--color-black);
  --shadow-offset-lg: 8px 8px 0px var(--color-black);

  /* High-Voltage Cyber Accents */
  --neon-yellow: #ffe600;
  --neon-pink: #ff2a6d;
  --neon-green: #05ffa1;
  --neon-purple: #7952ff;
  --neon-cyan: #00f0ff;
  --neon-orange: #ff7700;

  /* Active Color Roles */
  --accent: var(--neon-yellow);
  --accent-text: var(--color-black);

  /* Micro-Timing & Radii */
  --ease-brutal: cubic-bezier(0.2, 0.8, 0.2, 1);
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 999px;
}

/* Light Theme Override */
[data-theme="light"] {
  --bg-page: #f4f6fb;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-subtle: #e2e8f0;
  
  --color-black-pure: #ffffff;
  --color-white: #0a0f1d;
  --color-white-tint: #1e293b;
  
  --ink: #0a0f1d;
  --ink-secondary: #334155;
  --muted: #64748b;
  --muted-dark: #94a3b8;

  --border-color: #0a0f1d;
  --border-line: #cbd5e1;
  --border-glow: #94a3b8;

  --shadow-sidebar: rgba(10, 15, 29, 0.08);
  --shadow-topbar: rgba(10, 15, 29, 0.08);
  --backdrop-modal: rgba(10, 15, 29, 0.65);

  --shadow-offset-xs: 1px 1px 0px #0a0f1d;
  --shadow-offset-sm: 2px 2px 0px #0a0f1d;
  --shadow-offset: 4px 4px 0px #0a0f1d;
  --shadow-offset-hover: 6px 6px 0px #0a0f1d;
  --shadow-offset-active: 1px 1px 0px #0a0f1d;
  --shadow-offset-lg: 8px 8px 0px #0a0f1d;

  --card-dark-front: #ffffff;
  --card-dark-back: #f8fafc;
  --jebakan-bg: #fff1f2;
  --tip-bg: #ecfdf5;
  --nav-active-bg: rgba(255, 230, 0, 0.15);

  --accent: #ffe600;
  --accent-text: #0a0f1d;
}

/* Base Reset & Overflow Clip */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

html, body {
  background-color: var(--bg-page);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: clip;
  background-image: radial-gradient(var(--canvas-dot) 1.5px, transparent 1.5px);
  background-size: 24px 24px;
  background-attachment: fixed;
}

[data-theme="light"] body {
  background-image: radial-gradient(var(--canvas-dot-light) 1.5px, transparent 1.5px);
}

/* Global Strict Focus-Visible */
*:focus-visible {
  outline: 3px solid var(--neon-yellow) !important;
  outline-offset: 2px !important;
}

/* Accessibility Reduced Motion Fallback */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Skip to Content Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--neon-yellow);
  color: var(--color-black);
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-weight: 800;
  border: var(--border-width) solid var(--color-black);
  box-shadow: var(--shadow-offset);
  z-index: 99999;
  text-decoration: none;
  transition: top 0.15s ease-out;
}
.skip-link:focus-visible {
  top: 16px;
}

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-wrap: balance;
  overflow-wrap: break-word;
  min-width: 0;
}

p {
  color: var(--ink-secondary);
}

a {
  color: inherit;
  text-decoration: none;
}

/* Brutalist Scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-page);
  border-left: 2px solid var(--color-black);
}
::-webkit-scrollbar-thumb {
  background: var(--neon-purple);
  border: 2px solid var(--color-black);
  box-shadow: 1px 1px 0px var(--color-black);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--neon-yellow);
}

/* Top Brutalist Ticker */
.brutal-ticker-bar {
  background: var(--color-black);
  border-bottom: 2.5px solid var(--neon-yellow);
  color: var(--ink);
  padding: 0;
  overflow: hidden;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  position: sticky;
  top: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  user-select: none;
  height: 36px;
}
.ticker-content {
  display: inline-block;
  animation: tickerScroll 34s linear infinite;
}
.ticker-content:hover, .ticker-content:focus-within {
  animation-play-state: paused;
}
.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-right: 32px;
}
.ticker-badge {
  background: var(--neon-yellow);
  color: var(--color-black);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  font-weight: 900;
}
.ticker-badge.pink {
  background: var(--neon-pink);
  color: var(--color-pure-white);
}
.ticker-badge.green {
  background: var(--neon-green);
  color: var(--color-black);
}
.ticker-badge.purple {
  background: var(--neon-purple);
  color: var(--color-pure-white);
}
.ticker-badge.cyan {
  background: var(--neon-cyan);
  color: var(--color-black);
}
@keyframes tickerScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* App Shell Layout */
.app-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: calc(100vh - 36px);
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
    padding-bottom: 80px;
  }
}

/* ==========================================================================
   SIDEBAR (Desktop Navigation)
   ========================================================================== */
.sidebar {
  background: var(--bg-surface);
  border-right: 2.5px solid var(--border-color);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 36px;
  height: calc(100vh - 36px);
  overflow-y: auto;
  box-shadow: 4px 0 0 var(--shadow-sidebar);
  z-index: 100;
}

@media (max-width: 900px) {
  .sidebar {
    display: none;
  }
}

/* Brand Box */
.brand-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--color-black-pure);
  border: 2px solid var(--neon-yellow);
  box-shadow: 3px 3px 0px var(--neon-yellow);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform 0.15s var(--ease-brutal), box-shadow 0.15s var(--ease-brutal);
}
.brand-box:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0px var(--neon-yellow);
}
.brand-logo-mark {
  width: 38px;
  height: 38px;
  background: var(--neon-yellow);
  color: var(--color-black);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-black);
  font-weight: 900;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}
.brand-meta h1 {
  font-size: 1.15rem;
  letter-spacing: -0.04em;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
}
.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 900;
  background: var(--neon-pink);
  color: var(--color-white);
  padding: 2px 8px;
  border: 1px solid var(--color-black);
  border-radius: var(--radius-xs);
}
.brand-author {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--neon-green);
  display: block;
}

/* Nav Menu */
.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.nav-section-title {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.02em;
  margin: 8px 0 4px 8px;
}

.nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  color: var(--ink-secondary);
  font-weight: 700;
  white-space: nowrap;
  transition: transform 0.12s var(--ease-brutal), box-shadow 0.12s var(--ease-brutal), background-color 0.12s;
  cursor: pointer;
  background: transparent;
}
.nav-link-inner {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-link:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--color-black);
  color: var(--color-white);
  transform: translate(-1px, -1px);
  box-shadow: 2px 2px 0px var(--color-black);
}
.nav-link.active, .nav-link[aria-current="page"] {
  background: var(--neon-purple);
  color: var(--color-white);
  border-color: var(--color-black);
  box-shadow: 3px 3px 0px var(--color-black);
  transform: translate(-1px, -1px);
}
.nav-badge-pill {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  background: var(--color-black-pure);
  color: var(--neon-yellow);
  border: 1px solid var(--neon-yellow);
}
.nav-link.active .nav-badge-pill {
  background: var(--color-black-pure);
  color: var(--color-white);
  border-color: var(--color-white);
}

/* Sidebar Footer */
.sidebar-footer {
  margin-top: auto;
  padding: 12px;
  background: var(--bg-page);
  border: 2px solid var(--border-line);
  border-radius: var(--radius-sm);
}
.sidebar-credits {
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.45;
}
.sidebar-credits strong {
  color: var(--neon-yellow);
  display: block;
}

/* ==========================================================================
   TOP HEADER BAR
   ========================================================================== */
.main-content {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow-x: clip;
}

.top-bar {
  background: var(--bg-surface);
  border-bottom: 2.5px solid var(--border-color);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: sticky;
  top: 36px;
  z-index: 90;
  box-shadow: 0 4px 0 var(--shadow-topbar);
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}
.mobile-brand-title {
  display: none;
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--color-white);
}
@media (max-width: 900px) {
  .mobile-brand-title {
    display: inline-flex;
    align-items: center;
    gap: 8px;
  }
}

.system-status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  background: var(--color-black-pure);
  border: 1.5px solid var(--neon-green);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--neon-green);
  white-space: nowrap;
}
.status-dot-pulse {
  width: 8px;
  height: 8px;
  background: var(--neon-green);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--neon-green);
  animation: pulseDot 2s infinite;
}
@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Ambient Focus Audio Player Button */
.focus-audio-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--bg-surface-elevated);
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-offset-sm);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--color-white);
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.1s var(--ease-brutal), background-color 0.1s;
}
.focus-audio-btn:hover {
  background: var(--bg-card-hover);
  transform: translate(-1px, -1px);
}
.focus-audio-btn.playing {
  background: var(--neon-cyan);
  color: var(--color-black);
  border-color: var(--color-black);
  box-shadow: 3px 3px 0px var(--color-black);
}

/* Brutalist Buttons */
.brutal-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--color-black);
  background: var(--neon-yellow);
  border: 2.5px solid var(--color-black);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-offset);
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.1s var(--ease-brutal), box-shadow 0.1s var(--ease-brutal), background-color 0.1s;
  text-decoration: none;
  user-select: none;
}
.brutal-btn:hover:not(:disabled) {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-offset-hover);
}
.brutal-btn:active:not(:disabled) {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-offset-active);
}
.brutal-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: var(--shadow-offset-xs);
}

.brutal-btn.btn-pink {
  background: var(--neon-pink);
  color: var(--color-pure-white);
}
.brutal-btn.btn-green {
  background: var(--neon-green);
  color: var(--color-black);
}
.brutal-btn.btn-purple {
  background: var(--neon-purple);
  color: var(--color-pure-white);
}
.brutal-btn.btn-cyan {
  background: var(--neon-cyan);
  color: var(--color-black);
}
.brutal-btn.btn-outline {
  background: var(--bg-surface-elevated);
  color: var(--color-white);
  border-color: var(--color-black);
}
.brutal-btn.btn-sm {
  padding: 6px 12px;
  font-size: 0.78rem;
  box-shadow: var(--shadow-offset-sm);
}

.icon-btn-brutal {
  width: 38px;
  height: 38px;
  background: var(--bg-surface-elevated);
  border: 2px solid var(--color-black);
  box-shadow: var(--shadow-offset-sm);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.1s var(--ease-brutal), background-color 0.1s;
}
.icon-btn-brutal:hover {
  background: var(--neon-yellow);
  color: var(--color-black);
  transform: translate(-1px, -1px);
}
.icon-btn-brutal:active {
  transform: translate(2px, 2px);
}

/* ==========================================================================
   VIEW CONTAINER & VIEWS
   ========================================================================== */
.view-container {
  padding: 24px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

@media (max-width: 768px) {
  .view-container {
    padding: 14px 12px;
  }
  .top-bar {
    padding: 8px 12px;
    gap: 8px;
  }
  .top-bar-left {
    gap: 6px;
    min-width: 0;
  }
  .mobile-brand-title {
    font-size: 0.95rem;
    white-space: nowrap;
  }
  .top-bar-right {
    gap: 6px;
    flex-shrink: 0;
  }
  .system-status-chip {
    display: none !important;
  }
  .topbar-practice-btn {
    display: none !important;
  }
  .focus-audio-label {
    display: none !important;
  }
  .focus-audio-btn {
    padding: 8px 10px;
    width: 38px;
    height: 38px;
    min-width: 38px;
    justify-content: center;
  }
  .theme-toggle {
    width: 38px;
    height: 38px;
    min-width: 38px;
    padding: 8px;
  }
  .studio-header {
    padding: 10px 12px;
    flex-wrap: wrap;
    gap: 8px;
  }
  .studio-header > div:last-child {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
  }
  .studio-header > div:last-child .brutal-btn {
    flex: 1 1 auto;
    font-size: 0.75rem;
    padding: 7px 8px;
    justify-content: center;
  }
  .materials-grid-brutal {
    grid-template-columns: 1fr !important;
    gap: 14px;
  }
  .cheatsheet-grid-brutal {
    grid-template-columns: 1fr !important;
    gap: 14px;
  }
  .stats-grid-brutal {
    grid-template-columns: 1fr !important;
    gap: 12px;
  }
  .flashcard-box-3d {
    min-height: 320px;
  }
  .flashcard-face {
    padding: 18px 14px !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch;
  }
  .question-meta-row .badge-pill-brutal.cyan {
    display: none !important;
  }
  .quiz-header-bar {
    padding: 10px;
    flex-wrap: wrap;
    gap: 8px;
  }
  .quiz-header-bar > div:first-child {
    flex: 1 1 100%;
    justify-content: space-between;
  }
  .quiz-timer-chip, .anti-cheat-pill {
    flex: 1 1 auto;
    justify-content: center;
  }
  .quiz-header-bar > div:last-child {
    flex: 1 1 100%;
    display: flex;
    justify-content: stretch;
    gap: 6px;
    margin-top: 4px;
  }
  .quiz-header-bar > div:last-child button {
    flex: 1;
    padding: 8px 4px;
    font-size: 0.78rem;
    justify-content: center;
  }
  .question-card-brutal {
    padding: 16px;
  }
  .question-prompt-text {
    font-size: 1.05rem;
    line-height: 1.45;
  }
  .quiz-option-btn {
    padding: 10px 12px;
    gap: 10px;
  }
  .quiz-palette-modal {
    grid-template-columns: repeat(auto-fill, minmax(36px, 1fr));
    gap: 6px;
    padding: 10px;
  }
  .palette-cell-btn {
    height: 36px;
    font-size: 0.85rem;
  }
  dialog.studio-modal-window {
    max-width: calc(100vw - 20px) !important;
    max-height: 88dvh !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch;
    padding: 16px !important;
  }
}

.view-section {
  display: none;
}
.view-section.active {
  display: block;
  animation: fadeInView 0.18s var(--ease-brutal);
}
@keyframes fadeInView {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   HERO / BANNER
   ========================================================================== */
.brutal-hero {
  background: var(--color-black-pure);
  border: 3px solid var(--neon-yellow);
  box-shadow: 6px 6px 0px var(--neon-yellow);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  margin-bottom: 28px;
  color: var(--color-white);
}
.brutal-hero-badge-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}
.badge-pill-brutal {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--color-black);
  box-shadow: 2px 2px 0px var(--color-black);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.badge-pill-brutal.yellow { background: var(--neon-yellow); color: var(--color-black); }
.badge-pill-brutal.pink { background: var(--neon-pink); color: var(--color-pure-white); }
.badge-pill-brutal.green { background: var(--neon-green); color: var(--color-black); }
.badge-pill-brutal.purple { background: var(--neon-purple); color: var(--color-pure-white); }
.badge-pill-brutal.cyan { background: var(--neon-cyan); color: var(--color-black); }

.brutal-hero h2 {
  font-size: 2.2rem;
  letter-spacing: -0.04em;
  color: var(--color-white);
  margin-bottom: 12px;
  line-height: 1.1;
}
.brutal-hero h2 .highlight-yellow {
  background: var(--neon-yellow);
  color: var(--color-black);
  padding: 0 8px;
  display: inline-block;
}
.brutal-hero p {
  font-size: 1.05rem;
  color: var(--ink-secondary);
  max-width: 720px;
  margin-bottom: 20px;
  font-weight: 500;
}
.brutal-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Quick Stats Bar */
.stats-grid-brutal {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}
.stat-card-brutal {
  background: var(--bg-card);
  border: 2.5px solid var(--border-color);
  box-shadow: var(--shadow-offset);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: transform 0.15s var(--ease-brutal);
}
.stat-card-brutal:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-offset-hover);
}
.stat-icon-box {
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-black);
  box-shadow: 2px 2px 0px var(--color-black);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.stat-icon-box.yellow { background: var(--neon-yellow); color: var(--color-black); }
.stat-icon-box.pink { background: var(--neon-pink); color: var(--color-pure-white); }
.stat-icon-box.green { background: var(--neon-green); color: var(--color-black); }
.stat-icon-box.purple { background: var(--neon-purple); color: var(--color-pure-white); }

.stat-value {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 900;
  line-height: 1;
  color: var(--color-white);
  font-variant-numeric: tabular-nums;
}
.stat-label {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
}

/* ==========================================================================
   FILTER TABS & SEARCH
   ========================================================================== */
.controls-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}
.filter-tabs-brutal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tab-btn-brutal {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 800;
  padding: 6px 14px;
  background: var(--bg-surface-elevated);
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-offset-sm);
  color: var(--ink-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.1s var(--ease-brutal), background-color 0.1s;
}
.tab-btn-brutal:hover {
  background: var(--bg-card-hover);
  color: var(--color-white);
}
.tab-btn-brutal.active {
  background: var(--neon-cyan);
  color: var(--color-black);
  box-shadow: 3px 3px 0px var(--color-black);
  transform: translate(-1px, -1px);
}

.search-input-brutal-wrap {
  position: relative;
  min-width: 260px;
}
.search-input-brutal {
  width: 100%;
  padding: 10px 12px 10px 40px;
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-offset-sm);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  outline: none;
}
.search-input-brutal:focus {
  border-color: var(--neon-yellow);
  box-shadow: 3px 3px 0px var(--neon-yellow);
}
.search-input-brutal-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  pointer-events: none;
}

/* ==========================================================================
   MATERIALS GRID (LIBRARY)
   ========================================================================== */
.materials-grid-brutal {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.material-card-brutal {
  background: var(--bg-card);
  border: 2.5px solid var(--border-color);
  box-shadow: var(--shadow-offset);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s var(--ease-brutal), box-shadow 0.15s var(--ease-brutal);
  position: relative;
  overflow: hidden;
}
.material-card-brutal:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-offset-hover);
  border-color: var(--card-accent, var(--neon-yellow));
}

.card-top-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}
.card-cluster-tag {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  background: var(--color-black-pure);
  color: var(--card-accent, var(--neon-yellow));
  border: 1.5px solid var(--card-accent, var(--neon-yellow));
}
.card-pages-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
}

.material-card-brutal h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
  color: var(--color-white);
}
.material-card-brutal p {
  font-size: 0.88rem;
  color: var(--ink-secondary);
  margin-bottom: 16px;
  line-height: 1.45;
  flex-grow: 1;
}

/* Feature Chips */
.card-feature-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}
.feature-chip-mini {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border: 1.5px solid var(--color-black);
  box-shadow: 1px 1px 0px var(--color-black);
  border-radius: var(--radius-xs);
  background: var(--bg-surface-elevated);
  color: var(--color-white);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.feature-chip-mini.active {
  background: var(--neon-green);
  color: var(--color-black);
}

.card-footer-actions {
  display: flex;
  gap: 8px;
  padding-top: 14px;
  border-top: 2px dashed var(--border-line);
}

/* Home Exclusive Developer Card */
.home-dev-card-brutal {
  margin-top: 32px;
  background: var(--bg-card);
  border: 2.5px solid var(--neon-yellow);
  box-shadow: var(--shadow-offset);
  border-radius: var(--radius-md);
  padding: 24px;
}
.home-dev-badge-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.home-dev-main-box {
  display: flex;
  align-items: flex-start;
  gap: 18px;
}
.home-dev-avatar {
  width: 52px;
  height: 52px;
  background: var(--neon-yellow);
  color: var(--color-black);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2.5px solid var(--color-black);
  box-shadow: 3px 3px 0 var(--color-black);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}
.home-dev-details {
  flex: 1;
}
.home-dev-title {
  font-size: 1.25rem;
  margin: 0 0 8px;
  color: var(--color-white);
}
.home-dev-desc {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--ink-secondary);
  margin-bottom: 16px;
}
.home-dev-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
@media (max-width: 640px) {
  .home-dev-main-box {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Native HTML5 Dialog closed state */
dialog:not([open]) {
  display: none !important;
}

/* ==========================================================================
   STUDIO BELAJAR (MODAL)
   ========================================================================== */
.studio-modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--backdrop-modal);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.studio-modal-backdrop.open {
  display: flex;
  animation: fadeInModal 0.15s ease-out;
}
@keyframes fadeInModal {
  from { opacity: 0; }
  to { opacity: 1; }
}

.studio-modal-window {
  background: var(--bg-surface);
  border: 3px solid var(--color-black);
  box-shadow: var(--shadow-offset-lg);
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 1100px;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.studio-header {
  background: var(--color-black-pure);
  border-bottom: 2.5px solid var(--neon-yellow);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.studio-header-title {
  display: flex;
  align-items: center;
  gap: 12px;
}
.studio-header-title h2 {
  font-size: 1.25rem;
  color: var(--color-white);
}

/* Studio Nav Tabs */
.studio-tabs-bar {
  background: var(--bg-surface-elevated);
  border-bottom: 2px solid var(--border-color);
  padding: 8px 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.studio-tab-btn {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 800;
  padding: 8px 16px;
  background: var(--bg-surface);
  border: 2px solid var(--color-black);
  box-shadow: var(--shadow-offset-sm);
  color: var(--ink-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  transition: transform 0.1s var(--ease-brutal), background-color 0.1s;
}
.studio-tab-btn:hover {
  background: var(--bg-card-hover);
  color: var(--color-white);
}
.studio-tab-btn.active {
  background: var(--neon-yellow);
  color: var(--color-black);
  box-shadow: 3px 3px 0px var(--color-black);
  transform: translate(-1px, -1px);
}

.studio-body {
  padding: 24px;
  overflow-y: auto;
  flex-grow: 1;
}

/* Flashcard 3D */
.flashcards-container {
  max-width: 750px;
  margin: 0 auto;
}
.flashcard-progress-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--muted);
}
.flashcard-box-3d {
  perspective: 1200px;
  margin-bottom: 20px;
  min-height: 280px;
}
.flashcard-inner {
  position: relative;
  width: 100%;
  min-height: 280px;
  text-align: left;
  transition: transform 0.45s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  transform-style: preserve-3d;
  cursor: pointer;
}
.flashcard-inner.flipped {
  transform: rotateY(180deg);
}
.flashcard-face {
  position: absolute;
  inset: 0;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border: 3px solid var(--color-black);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-offset-hover);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.flashcard-front {
  background: var(--card-dark-front);
  color: var(--color-white);
}
.flashcard-back {
  background: var(--card-dark-back);
  color: var(--color-white);
  transform: rotateY(180deg);
}
.flashcard-term {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--neon-yellow);
  margin-bottom: 12px;
}
.flashcard-hint-badge {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--neon-cyan);
}
.flashcard-definition {
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: 14px;
}
.flashcard-jebakan {
  background: var(--jebakan-bg);
  border: 1.5px solid var(--neon-pink);
  padding: 8px 12px;
  font-size: 0.88rem;
  margin-bottom: 10px;
  border-radius: var(--radius-xs);
}
.flashcard-jebakan strong {
  color: var(--neon-pink);
}
.flashcard-tip {
  background: var(--tip-bg);
  border: 1.5px solid var(--neon-green);
  padding: 8px 12px;
  font-size: 0.88rem;
  border-radius: var(--radius-xs);
}
.flashcard-tip strong {
  color: var(--neon-green);
}

.flashcard-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 16px;
}

/* Interactive Lab View */
.lab-container {
  max-width: 800px;
  margin: 0 auto;
  background: var(--color-black-pure);
  border: 3px solid var(--neon-cyan);
  box-shadow: 6px 6px 0px var(--neon-cyan);
  border-radius: var(--radius-md);
  padding: 24px;
}
.lab-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 2px dashed var(--neon-cyan);
  padding-bottom: 12px;
  margin-bottom: 18px;
}
.lab-header h3 {
  color: var(--neon-cyan);
  font-size: 1.3rem;
}
.lab-interactive-surface {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  padding: 20px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}
.lab-slider-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 16px 0;
}
.lab-slider-row input[type="range"] {
  flex-grow: 1;
  accent-color: var(--neon-yellow);
  height: 8px;
}
.lab-output-box {
  background: var(--color-black-pure);
  border: 2px solid var(--neon-green);
  box-shadow: 3px 3px 0px var(--neon-green);
  padding: 16px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  color: var(--color-white);
}

/* Checkpoint Quiz */
.checkpoint-container {
  max-width: 750px;
  margin: 0 auto;
}
.checkpoint-question-card {
  background: var(--bg-card);
  border: 2.5px solid var(--color-black);
  box-shadow: var(--shadow-offset);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
}
.checkpoint-question-card h4 {
  font-size: 1.1rem;
  margin-bottom: 16px;
}
.checkpoint-option-btn {
  width: 100%;
  text-align: left;
  padding: 12px 16px;
  margin-bottom: 8px;
  background: var(--bg-surface-elevated);
  border: 2px solid var(--color-black);
  box-shadow: var(--shadow-offset-sm);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-family: var(--font-body);
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: transform 0.1s var(--ease-brutal), background-color 0.1s;
}
.checkpoint-option-btn:hover {
  background: var(--bg-card-hover);
}
.checkpoint-option-btn.correct {
  background: var(--neon-green) !important;
  color: var(--color-black) !important;
  font-weight: 800;
}
.checkpoint-option-btn.wrong {
  background: var(--neon-pink) !important;
  color: var(--color-white) !important;
}

/* PDF Split Layout */
.pdf-split-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 16px;
  height: 70vh;
}
@media (max-width: 850px) {
  .pdf-split-layout {
    grid-template-columns: 1fr;
    height: auto;
  }
}
.pdf-frame-wrapper {
  background: var(--color-black-pure);
  border: 2.5px solid var(--color-black);
  box-shadow: var(--shadow-offset);
  border-radius: var(--radius-sm);
  overflow: hidden;
  height: 100%;
  min-height: 480px;
}
.pdf-frame-wrapper iframe {
  width: 100%;
  height: 100%;
  border: none;
}
.scratchpad-sidebar {
  background: var(--bg-surface-elevated);
  border: 2.5px solid var(--color-black);
  box-shadow: var(--shadow-offset);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  flex-direction: column;
}
.scratchpad-sidebar h4 {
  font-size: 0.95rem;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.scratchpad-textarea-brutal {
  width: 100%;
  flex-grow: 1;
  background: var(--color-black-pure);
  color: var(--color-white);
  border: 2px solid var(--border-line);
  padding: 12px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.5;
  resize: none;
  outline: none;
  min-height: 240px;
}
.scratchpad-textarea-brutal:focus {
  border-color: var(--neon-yellow);
}

/* ==========================================================================
   QUIZ ARENA (PRACTICE MODE)
   ========================================================================== */
.quiz-arena {
  max-width: 860px;
  margin: 0 auto;
}

.quiz-header-bar {
  background: var(--color-black-pure);
  border: 2.5px solid var(--neon-yellow);
  box-shadow: 4px 4px 0px var(--neon-yellow);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.quiz-timer-chip {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--neon-yellow);
  background: var(--bg-page);
  padding: 4px 10px;
  border: 1px solid var(--neon-yellow);
  border-radius: var(--radius-xs);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-variant-numeric: tabular-nums;
}
.quiz-mode-pill {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 4px 8px;
  border: 1.5px solid var(--color-black);
  box-shadow: 1px 1px 0 var(--color-black);
  border-radius: var(--radius-xs);
  background: var(--neon-purple);
  color: var(--color-pure-white);
}
.quiz-mode-pill.pink {
  background: var(--neon-pink);
  color: var(--color-pure-white);
}

/* CBT Anti-Cheat Integrity Pill */
.anti-cheat-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: var(--bg-card);
  border: 2px solid var(--neon-pink);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--neon-pink);
  box-shadow: 2px 2px 0 var(--color-black);
  transition: transform 0.15s var(--ease-brutal), border-color 0.15s;
}
.anti-cheat-dot {
  width: 8px;
  height: 8px;
  background: var(--neon-pink);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--neon-pink);
  animation: pulseDot 1.2s infinite;
}
.anti-cheat-violations-badge {
  background: var(--neon-pink);
  color: var(--color-pure-white);
  padding: 1px 6px;
  border-radius: var(--radius-xs);
  font-size: 0.68rem;
  font-weight: 900;
}

.question-card-brutal {
  background: var(--bg-card);
  border: 3px solid var(--color-black);
  box-shadow: var(--shadow-offset-hover);
  border-radius: var(--radius-md);
  padding: 28px;
  margin-bottom: 24px;
}

.question-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px dashed var(--border-line);
}

/* Authentic PDF Stimulus Box */
.question-passage-box {
  background: var(--bg-page);
  border: 2px solid var(--neon-cyan);
  box-shadow: 3px 3px 0px var(--neon-cyan);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 20px;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--ink-secondary);
}
.passage-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--neon-cyan);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Authentic PDF Visual Diagram Stimulus Box */
.question-diagram-box {
  background: var(--bg-page);
  border: 2px solid var(--neon-pink);
  box-shadow: 3px 3px 0px var(--neon-pink);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 20px;
}
.diagram-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--neon-pink);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.diagram-render-area {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-sm);
}
.diagram-svg {
  width: 100%;
  max-width: 580px;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
}

/* Practice Subject / Cluster Selector Card */
.practice-selector-card {
  background: var(--bg-surface-elevated);
  border: 2px solid var(--color-black);
  box-shadow: 4px 4px 0px var(--color-black);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 20px;
}
.practice-cluster-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.practice-cluster-btn {
  background: var(--bg-page);
  border: 1.5px solid var(--border-line);
  color: var(--ink-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.15s var(--ease-brutal), color 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.practice-cluster-btn:hover {
  border-color: var(--neon-yellow);
  color: var(--color-white);
}
.practice-cluster-btn.active {
  background: var(--neon-yellow);
  color: var(--color-black);
  border-color: var(--color-black);
  font-weight: 900;
  box-shadow: 2px 2px 0px var(--color-black);
}
.practice-select-dropdown {
  width: 100%;
  background: var(--bg-page);
  color: var(--color-white);
  border: 2px solid var(--border-line);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--font-body);
  font-weight: 600;
  cursor: pointer;
}
.practice-select-dropdown:focus {
  outline: none;
  border-color: var(--neon-pink);
  box-shadow: 2px 2px 0px var(--neon-pink);
}
.practice-info-banner {
  margin-top: 12px;
  padding: 8px 12px;
  background: var(--bg-page);
  border: 1.5px solid var(--neon-green);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--ink-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.question-prompt-text {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--color-white);
  margin-bottom: 20px;
}

.quiz-options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.quiz-option-btn {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 18px;
  background: var(--bg-surface-elevated);
  border: 2.5px solid var(--color-black);
  box-shadow: 3px 3px 0px var(--color-black);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  cursor: pointer;
  transition: transform 0.1s var(--ease-brutal), background-color 0.1s;
  text-align: left;
}
.quiz-option-btn:hover {
  background: var(--bg-card-hover);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0px var(--color-black);
}
.quiz-option-btn:active {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-offset-active);
}
.quiz-option-btn.selected {
  background: var(--neon-purple);
  color: var(--color-white);
  border-color: var(--color-black);
  box-shadow: 4px 4px 0px var(--neon-yellow);
}
.option-key-badge {
  width: 30px;
  height: 30px;
  margin-top: 2px;
  background: var(--color-black-pure);
  color: var(--neon-yellow);
  border: 1.5px solid var(--neon-yellow);
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 900;
  flex-shrink: 0;
}
.quiz-option-btn.selected .option-key-badge {
  background: var(--neon-yellow);
  color: var(--color-black);
  border-color: var(--color-black);
}

.quiz-navigation-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* Number Grid Palette */
.quiz-palette-modal {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(42px, 1fr));
  gap: 8px;
  padding: 16px;
  background: var(--color-black-pure);
  border: 2.5px solid var(--color-black);
  border-radius: var(--radius-sm);
  margin-top: 20px;
}
.palette-cell-btn {
  height: 42px;
  background: var(--bg-surface-elevated);
  border: 2px solid var(--color-black);
  box-shadow: 2px 2px 0px var(--color-black);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-variant-numeric: tabular-nums;
}
.palette-cell-btn.answered {
  background: var(--neon-green);
  color: var(--color-black);
}
.palette-cell-btn.current {
  border-color: var(--neon-yellow);
  box-shadow: 0 0 0 2px var(--neon-yellow);
}
.palette-cell-btn.flagged {
  border-top: 4px solid var(--neon-pink);
}
.palette-cell-btn.bookmarked {
  border-bottom: 4px solid var(--neon-cyan);
}

/* ==========================================================================
   RESULTS & CLUSTER ACCURACY RADAR
   ========================================================================== */
.results-card-brutal {
  background: var(--color-black-pure);
  border: 3px solid var(--neon-yellow);
  box-shadow: 8px 8px 0px var(--neon-yellow);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  text-align: center;
  margin-bottom: 28px;
  color: var(--color-white);
}
.score-circle-brutal {
  width: 140px;
  height: 140px;
  background: var(--neon-yellow);
  color: var(--color-black);
  border: 4px solid var(--color-black);
  box-shadow: 6px 6px 0px var(--color-black);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}
.score-number {
  font-family: var(--font-display);
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.score-total {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
}

/* Cluster Accuracy Progress Bars (Animated via transform scaleX) */
.cluster-breakdown-card {
  background: var(--bg-card);
  border: 2.5px solid var(--border-color);
  box-shadow: var(--shadow-offset);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 28px;
}
.cluster-bar-row {
  margin-bottom: 16px;
}
.cluster-bar-header {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 800;
  margin-bottom: 6px;
}
.cluster-progress-track {
  width: 100%;
  height: 16px;
  background: var(--bg-surface-elevated);
  border: 2px solid var(--color-black);
  border-radius: var(--radius-xs);
  overflow: hidden;
}
.cluster-progress-fill {
  height: 100%;
  width: 100%;
  transform-origin: left;
  background: var(--neon-yellow);
  border-right: 2px solid var(--color-black);
  transition: transform 0.4s var(--ease-brutal);
}
.cluster-progress-fill.green { background: var(--neon-green); }
.cluster-progress-fill.pink { background: var(--neon-pink); }
.cluster-progress-fill.cyan { background: var(--neon-cyan); }

/* ==========================================================================
   CHEATSHEET GRID
   ========================================================================== */
.cheatsheet-grid-brutal {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 20px;
}
.cheat-card-brutal {
  background: var(--bg-card);
  border: 2.5px solid var(--border-color);
  box-shadow: var(--shadow-offset);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: transform 0.15s var(--ease-brutal);
}
.cheat-card-brutal:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-offset-hover);
}
.cheat-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px dashed var(--border-line);
}
.cheat-card-header h3 {
  font-size: 1.15rem;
}
.cheat-formula-box {
  background: var(--color-black-pure);
  border: 1.5px solid var(--neon-yellow);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--neon-yellow);
  margin-bottom: 8px;
}
.cheat-tip-text {
  font-size: 0.82rem;
  color: var(--ink-secondary);
  line-height: 1.4;
  margin-bottom: 16px;
}

/* ==========================================================================
   MOBILE BOTTOM DOCK
   ========================================================================== */
.mobile-nav-dock {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-black-pure);
  border-top: 3px solid var(--neon-yellow);
  padding: 0 0 env(safe-area-inset-bottom, 0px) 0;
  height: calc(58px + env(safe-area-inset-bottom, 0px));
  z-index: 10000;
  justify-content: space-around;
  align-items: center;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  transition: transform 0.25s var(--ease-brutal), opacity 0.25s;
}
body.in-cbt-exam .mobile-nav-dock {
  transform: translateY(120%);
  opacity: 0;
  pointer-events: none;
}
@media (max-width: 900px) {
  .mobile-nav-dock {
    display: flex;
  }
}
.mobile-nav-item {
  flex: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  padding: 6px 0;
}
.mobile-nav-item.active {
  color: var(--neon-yellow);
  background: var(--nav-active-bg);
}
.mobile-nav-item svg {
  width: 20px;
  height: 20px;
  pointer-events: none;
}
.mobile-nav-item span {
  pointer-events: none;
}
.nav-link-inner,
.nav-link svg,
.nav-link span {
  pointer-events: none;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999999;
  pointer-events: none;
}
@media (max-width: 900px) {
  .toast-container {
    bottom: calc(72px + env(safe-area-inset-bottom, 0px));
    left: 16px;
    right: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .toast-brutal {
    width: 100%;
    max-width: 380px;
    justify-content: center;
    text-align: center;
  }
}
body.in-cbt-exam .toast-container {
  bottom: calc(20px + env(safe-area-inset-bottom, 0px)) !important;
}
.toast-brutal {
  background: var(--color-black-pure);
  color: var(--color-white);
  border: 2.5px solid var(--neon-green);
  box-shadow: 4px 4px 0px var(--neon-green);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
  animation: slideToast 0.2s var(--ease-brutal);
}
@keyframes slideToast {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ==========================================================================
   CUSTOM CYBER-BRUTALIST SELECT DROPDOWN (NO NATIVE BROWSER PICKER)
   ========================================================================== */
.custom-select-wrapper {
  position: relative;
  width: 100%;
  margin-top: 10px;
}
.custom-select-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-secondary);
  margin-bottom: 6px;
}
.custom-select-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--bg-card);
  color: var(--color-white);
  border: 2.5px solid var(--border-color);
  box-shadow: 3px 3px 0px var(--color-black);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  text-align: left;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: border-color 0.15s, box-shadow 0.15s, background-color 0.15s;
}
.custom-select-trigger:hover,
.custom-select-wrapper.open .custom-select-trigger {
  border-color: var(--neon-yellow);
  box-shadow: 4px 4px 0px var(--neon-yellow);
  background: var(--bg-surface-elevated);
}
.custom-select-value {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex: 1;
}
.custom-select-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}
.custom-select-text {
  font-weight: 800;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--color-white);
}
.custom-select-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 8px;
  background: var(--neon-cyan);
  color: var(--color-black);
  border: 1.5px solid var(--color-black);
  border-radius: 4px;
  white-space: nowrap;
  flex-shrink: 0;
}
.custom-select-chevron {
  flex-shrink: 0;
  color: var(--ink-secondary);
  transition: transform 0.2s var(--ease-brutal);
}
.custom-select-wrapper.open .custom-select-chevron {
  transform: rotate(180deg);
  color: var(--neon-yellow);
}
.custom-select-panel {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--color-black-pure);
  border: 2.5px solid var(--neon-yellow);
  box-shadow: 5px 5px 0px rgba(0, 0, 0, 0.8), 0 12px 28px rgba(0, 0, 0, 0.6);
  border-radius: var(--radius-sm);
  max-height: 340px;
  overflow-y: auto;
  z-index: 500;
  padding: 6px;
  display: none;
  animation: dropdownPop 0.15s var(--ease-brutal);
}
.custom-select-wrapper.open .custom-select-panel {
  display: block;
}
@keyframes dropdownPop {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}
.custom-select-group-header {
  padding: 8px 8px 4px;
  margin-top: 4px;
  border-top: 1px dashed rgba(255, 255, 255, 0.15);
}
.custom-select-group-header:first-of-type {
  border-top: none;
  margin-top: 0;
}
.custom-select-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.1s, border-color 0.1s;
  border: 1.5px solid transparent;
  margin-bottom: 2px;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.custom-select-option:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--border-color);
}
.custom-select-option.active,
.custom-select-option[aria-selected="true"] {
  background: rgba(255, 230, 0, 0.14);
  border-color: var(--neon-yellow);
}
.custom-select-option-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}
.custom-select-option-title {
  font-weight: 800;
  font-size: 0.88rem;
  color: var(--color-white);
}
.custom-select-option.active .custom-select-option-title {
  color: var(--neon-yellow);
}
.custom-select-option-desc {
  font-size: 0.72rem;
  color: var(--ink-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==========================================================================
   WELCOME & KOMDIGI 2025 NOTICE MODAL POPUP
   ========================================================================== */
.welcome-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.84);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s var(--ease-brutal);
}
.welcome-modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}
.welcome-modal-card {
  background: var(--color-black-pure);
  color: var(--color-white);
  border: 3px solid var(--neon-yellow);
  box-shadow: 8px 8px 0px var(--neon-pink);
  border-radius: var(--radius-md);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 24px;
  position: relative;
  transform: scale(0.95) translateY(12px);
  transition: transform 0.2s var(--ease-brutal);
}
.welcome-modal-backdrop.open .welcome-modal-card {
  transform: scale(1) translateY(0);
}
.welcome-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  background: var(--bg-surface-elevated);
  border: 2px solid var(--border-color);
  color: var(--color-white);
  font-size: 1.2rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
  line-height: 1;
}
.welcome-modal-close:hover {
  background: var(--neon-pink);
  border-color: var(--color-pure-white);
  color: var(--color-pure-white);
  transform: scale(1.06);
}
.welcome-badge-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
  padding-right: 36px;
}
.welcome-modal-title {
  font-size: 1.4rem;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.03em;
  color: var(--color-white);
  margin-bottom: 14px;
}
.welcome-callout-box {
  display: flex;
  gap: 12px;
  background: rgba(255, 230, 0, 0.08);
  border: 2px solid var(--neon-yellow);
  padding: 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}
.welcome-callout-icon {
  font-size: 1.8rem;
  line-height: 1;
  flex-shrink: 0;
}
.welcome-callout-text strong {
  display: block;
  color: var(--neon-yellow);
  font-size: 0.92rem;
  margin-bottom: 4px;
}
.welcome-callout-text p {
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--color-white);
  margin: 0;
}
.welcome-subtext {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--ink-secondary);
  margin-bottom: 20px;
}
.welcome-modal-footer {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.btn-rhmt-spotlight {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--neon-yellow);
  color: var(--color-black-pure) !important;
  font-size: 1rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  padding: 13px 20px;
  border: 3px solid var(--color-black-pure);
  box-shadow: 5px 5px 0px var(--neon-pink);
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s var(--ease-brutal);
}
.btn-rhmt-spotlight:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0px var(--neon-pink);
  background: #fff34d;
}
.btn-enter-portal {
  background: var(--bg-surface-elevated);
  color: var(--color-white);
  border: 2px solid var(--border-color);
  box-shadow: 3px 3px 0px var(--color-black);
  padding: 11px 16px;
  font-size: 0.88rem;
  font-weight: 800;
  cursor: pointer;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all 0.12s;
}
.btn-enter-portal:hover {
  background: var(--bg-card-hover);
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
}

/* ==========================================================================
   MOBILE HIGH-DENSITY SCALING (360px - 480px VIEWPORT & BOTTOM DOCK SLEEK)
   Emulates 480dpi spatial density on standard 360-380px phone screens!
   ========================================================================== */
@media (max-width: 480px) {
  /* Scale root rem base proportionally: 380/480 = ~0.79x (12.2px vs 15px) */
  html {
    font-size: 12.2px !important;
  }

  /* Compact Ticker Bar */
  .ticker-wrap {
    height: 24px !important;
    line-height: 24px !important;
    font-size: 0.65rem !important;
  }

  /* Compact Top Bar */
  .top-bar {
    height: 42px !important;
    padding: 0 10px !important;
    top: 24px !important;
    border-bottom-width: 2px !important;
  }
  .mobile-brand-title {
    font-size: 0.85rem !important;
    gap: 6px !important;
  }
  .mobile-brand-title .brand-logo-mark {
    width: 26px !important;
    height: 26px !important;
    font-size: 0.75rem !important;
    border-width: 1.5px !important;
  }
  .focus-audio-btn,
  .theme-toggle {
    width: 32px !important;
    height: 32px !important;
    min-width: 32px !important;
    padding: 5px !important;
    border-width: 1.5px !important;
  }
  .focus-audio-btn svg,
  .theme-toggle svg {
    width: 14px !important;
    height: 14px !important;
  }

  /* App Shell & View Container */
  .app-shell {
    min-height: calc(100vh - 24px) !important;
    padding-bottom: calc(52px + env(safe-area-inset-bottom, 0px)) !important;
  }
  .view-container {
    padding: 10px 10px 18px !important;
  }

  /* Hero Banner - No Longer Giant! */
  .brutal-hero {
    padding: 14px 12px !important;
    border-width: 2px !important;
    box-shadow: 3px 3px 0px var(--neon-yellow) !important;
    margin-bottom: 12px !important;
    border-radius: var(--radius-sm) !important;
  }
  .brutal-hero-badge-row {
    gap: 4px !important;
    margin-bottom: 8px !important;
  }
  .badge-pill-brutal {
    font-size: 0.62rem !important;
    padding: 2px 6px !important;
    border-width: 1.2px !important;
  }
  .brutal-hero h2 {
    font-size: 1.25rem !important;
    line-height: 1.22 !important;
    margin-bottom: 8px !important;
    letter-spacing: -0.03em !important;
  }
  .brutal-hero h2 .highlight-yellow {
    padding: 0 4px !important;
  }
  .brutal-hero p {
    font-size: 0.8rem !important;
    line-height: 1.42 !important;
    margin-bottom: 12px !important;
  }
  /* 2-Column Balanced Action Grid instead of 4 Giant Vertical Buttons */
  .brutal-hero-actions {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 6px !important;
  }
  .brutal-hero-actions .brutal-btn:first-child {
    grid-column: 1 / -1 !important;
  }
  .brutal-hero-actions .brutal-btn {
    padding: 8px 10px !important;
    font-size: 0.78rem !important;
    box-shadow: 2px 2px 0px var(--color-black) !important;
    border-width: 2px !important;
    white-space: normal !important;
    text-align: center !important;
    line-height: 1.2 !important;
  }

  /* Sleek, Compact Mobile Bottom Dock */
  .mobile-nav-dock {
    height: calc(46px + env(safe-area-inset-bottom, 0px)) !important;
    border-top: 2px solid var(--neon-yellow) !important;
    padding: 0 0 env(safe-area-inset-bottom, 0px) 0 !important;
  }
  .mobile-nav-item {
    font-size: 0.62rem !important;
    font-weight: 700 !important;
    padding: 2px 0 !important;
    gap: 1px !important;
  }
  .mobile-nav-item svg {
    width: 16px !important;
    height: 16px !important;
  }

  /* Stats Grid Compact */
  .stats-grid-brutal {
    gap: 8px !important;
    margin-bottom: 12px !important;
  }
  .stat-card-brutal {
    padding: 8px 10px !important;
    border-width: 2px !important;
    box-shadow: 2px 2px 0px var(--border-color) !important;
    gap: 8px !important;
  }
  .stat-icon-box {
    width: 32px !important;
    height: 32px !important;
    border-width: 1.5px !important;
  }
  .stat-icon-box svg {
    width: 16px !important;
    height: 16px !important;
  }
  .stat-card-content h3 {
    font-size: 1.1rem !important;
  }
  .stat-card-content p {
    font-size: 0.68rem !important;
  }

  /* Practice Card & Custom Dropdown on Mobile */
  .practice-selector-card {
    padding: 12px 10px !important;
    border-width: 2px !important;
    box-shadow: 3px 3px 0px var(--color-black) !important;
  }
  .practice-cluster-chips {
    gap: 4px !important;
  }
  .practice-cluster-btn {
    padding: 4px 8px !important;
    font-size: 0.72rem !important;
    border-width: 1.5px !important;
  }
  .custom-select-trigger {
    padding: 8px 10px !important;
    font-size: 0.82rem !important;
    border-width: 2px !important;
    box-shadow: 2px 2px 0px var(--color-black) !important;
  }
  .custom-select-option {
    padding: 6px 8px !important;
  }
  .custom-select-option-title {
    font-size: 0.8rem !important;
  }
  .custom-select-option-desc {
    font-size: 0.68rem !important;
  }
  .practice-info-banner {
    padding: 8px 10px !important;
    font-size: 0.75rem !important;
    gap: 6px !important;
  }

  /* Welcome Modal Mobile Adjustments */
  .welcome-modal-card {
    padding: 16px 14px !important;
    border-width: 2.5px !important;
    box-shadow: 5px 5px 0px var(--neon-pink) !important;
  }
  .welcome-modal-title {
    font-size: 1.15rem !important;
  }
  .welcome-callout-box {
    padding: 10px !important;
    gap: 8px !important;
  }
  .welcome-callout-icon {
    font-size: 1.4rem !important;
  }
  .welcome-callout-text strong {
    font-size: 0.85rem !important;
  }
  .welcome-callout-text p {
    font-size: 0.78rem !important;
  }
  .welcome-subtext {
    font-size: 0.78rem !important;
    margin-bottom: 14px !important;
  }
  .btn-rhmt-spotlight {
    font-size: 0.88rem !important;
    padding: 10px 14px !important;
    box-shadow: 4px 4px 0px var(--neon-pink) !important;
  }
  .btn-enter-portal {
    font-size: 0.8rem !important;
    padding: 9px 12px !important;
  }

  /* Toast Notification */
  .toast-container {
    bottom: calc(56px + env(safe-area-inset-bottom, 0px)) !important;
  }
  .toast-brutal {
    padding: 8px 14px !important;
    font-size: 0.78rem !important;
  }
}