/* ============================================
   248 ARENA — MA Journeyman Plumbing Exam
   Arena/Fighting Game Aesthetic
   ============================================ */

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

/* === CSS Variables === */
:root {
  --bg-dark: #0a0a0f;
  --bg-card: #12121a;
  --bg-card-hover: #1a1a2e;
  --bg-surface: #16162a;
  --bg-input: #1e1e35;
  
  --neon-blue: #00d4ff;
  --neon-orange: #ff6b2b;
  --neon-green: #00ff88;
  --neon-purple: #b44aff;
  --neon-red: #ff2d55;
  --neon-yellow: #ffdd00;
  --neon-cyan: #00f0ff;
  
  --text-primary: #e8e8f0;
  --text-secondary: #9898b0;
  --text-muted: #5a5a78;
  --text-white: #ffffff;
  
  --success: #00ff88;
  --danger: #ff2d55;
  --warning: #ffdd00;
  --info: #00d4ff;
  
  --border: #2a2a45;
  --border-glow: rgba(0, 212, 255, 0.3);
  
  --glow-blue: 0 0 20px rgba(0, 212, 255, 0.4), 0 0 40px rgba(0, 212, 255, 0.1);
  --glow-orange: 0 0 20px rgba(255, 107, 43, 0.4), 0 0 40px rgba(255, 107, 43, 0.1);
  --glow-green: 0 0 20px rgba(0, 255, 136, 0.4), 0 0 40px rgba(0, 255, 136, 0.1);
  --glow-red: 0 0 20px rgba(255, 45, 85, 0.4);
  --glow-purple: 0 0 20px rgba(180, 74, 255, 0.4);
  
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --font-display: 'Orbitron', sans-serif;
  --font-heading: 'Rajdhani', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--neon-blue); text-decoration: none; }
a:hover { text-decoration: underline; }
button { cursor: pointer; font-family: var(--font-body); border: none; outline: none; }
img { max-width: 100%; }
input, textarea, select { font-family: var(--font-body); }

/* === Background Effects === */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(255, 107, 43, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(0, 255, 136, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* Grid overlay */
body::after {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    linear-gradient(rgba(0, 212, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* ============================================
   LANDING PAGE (index.html)
   ============================================ */

.landing-page {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Landing Nav */
.landing-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  position: relative;
  z-index: 10;
}
.landing-logo {
  display: flex; align-items: center; gap: 12px;
}
.landing-logo .logo-icon {
  width: 48px; height: 48px;
}
.landing-logo .logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-white);
  letter-spacing: 2px;
}
.landing-logo .logo-text span { color: var(--neon-blue); }
.landing-nav-links {
  display: flex; gap: 24px; align-items: center;
}
.landing-nav-links a {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: var(--transition);
}
.landing-nav-links a:hover { color: var(--neon-blue); text-decoration: none; }

/* Hero */
.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 60px 20px 40px;
  position: relative;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 999px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--neon-blue);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 24px;
  animation: pulse-glow 3s infinite;
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 10px rgba(0, 212, 255, 0.2); }
  50% { box-shadow: 0 0 25px rgba(0, 212, 255, 0.4); }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text-white) 0%, var(--neon-blue) 50%, var(--neon-orange) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
}
.hero .tagline {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 12px;
}
.hero .sub-tagline {
  font-size: 1rem;
  color: var(--neon-orange);
  font-weight: 600;
  margin-bottom: 40px;
  font-family: var(--font-heading);
  letter-spacing: 1px;
}

/* Hero Icons Row */
.hero-icons {
  display: flex;
  gap: 32px;
  margin-bottom: 40px;
  flex-wrap: wrap;
  justify-content: center;
}
.hero-icon {
  width: 64px; height: 64px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.hero-icon:hover {
  border-color: var(--neon-blue);
  box-shadow: var(--glow-blue);
  transform: translateY(-4px);
}
.hero-icon svg { width: 32px; height: 32px; }

/* Login Card */
.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 420px;
  position: relative;
  overflow: hidden;
}
.login-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-blue), var(--neon-orange), var(--neon-green));
}
.login-card h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 24px;
  color: var(--text-white);
  letter-spacing: 1px;
}
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}
.form-input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}
.form-input:focus {
  border-color: var(--neon-blue);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
  outline: none;
}
.form-input::placeholder { color: var(--text-muted); }

.btn-primary {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--neon-blue), #0090ff);
  color: var(--text-white);
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-blue);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary::after {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
  transform: rotate(45deg);
  transition: 0.5s;
}
.btn-primary:hover::after { left: 100%; }

.btn-secondary {
  width: 100%;
  padding: 14px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  margin-top: 8px;
}
.btn-secondary:hover { border-color: var(--neon-blue); color: var(--neon-blue); }

/* About Section */
.about-section {
  padding: 60px 20px;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}
.about-section h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--neon-orange);
  margin-bottom: 16px;
}
.about-section p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
}

/* Feature Cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  padding: 0 20px 60px;
  max-width: 1000px;
  margin: 0 auto;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}
.feature-card:hover {
  border-color: var(--neon-blue);
  transform: translateY(-4px);
  box-shadow: var(--glow-blue);
}
.feature-card .fc-icon {
  width: 48px; height: 48px;
  margin: 0 auto 12px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0, 212, 255, 0.1);
  border-radius: 50%;
}
.feature-card .fc-icon svg { width: 24px; height: 24px; fill: var(--neon-blue); }
.feature-card h4 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 6px;
}
.feature-card p { color: var(--text-muted); font-size: 0.85rem; }

/* Footer */
.landing-footer {
  text-align: center;
  padding: 24px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ============================================
   APP LAYOUT (app.html)
   ============================================ */

.app-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* App Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: rgba(18, 18, 26, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.app-header .header-left {
  display: flex; align-items: center; gap: 12px;
}
.header-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-white);
  letter-spacing: 1px;
}
.header-logo span { color: var(--neon-blue); }

.header-user {
  display: flex; align-items: center; gap: 12px;
}
.user-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  border: 2px solid var(--border);
}
.user-info { text-align: right; }
.user-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-white);
}
.user-level {
  font-size: 0.75rem;
  color: var(--neon-blue);
  font-weight: 600;
}

/* XP Bar */
.xp-bar {
  height: 4px;
  background: var(--bg-input);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 2px;
  width: 100px;
}
.xp-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--neon-blue), var(--neon-green));
  border-radius: 2px;
  transition: width 0.5s ease;
}

/* Bottom Nav */
/* Keyboard hint under the question — only meaningful where a keyboard exists,
   so it's hidden on coarse-pointer (touch) devices. */
.kbd-hint {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.72rem;
  margin-top: 10px;
  opacity: 0.7;
}
.kbd-hint strong { color: #9898b0; }
@media (pointer: coarse) { .kbd-hint { display: none; } }

.bottom-nav {
  display: flex;
  justify-content: space-around;
  padding: 8px 0;
  background: rgba(18, 18, 26, 0.98);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  position: fixed;
  bottom: 0;
  left: 0; right: 0;
  z-index: 100;
}
.nav-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  /* Six tabs have to fit a 360px phone, so they share the width evenly and
     shrink instead of overflowing. min-width:0 lets flex actually do that. */
  flex: 1 1 0;
  min-width: 0;
  padding: 6px 4px;
  color: var(--text-muted);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  background: none;
  font-family: var(--font-heading);
  position: relative;
}
.nav-tab svg { width: 22px; height: 22px; fill: currentColor; }
.nav-tab.active { color: var(--neon-blue); }
.nav-tab.active::after {
  content: '';
  position: absolute;
  top: -8px;
  left: 50%; transform: translateX(-50%);
  width: 30px; height: 3px;
  background: var(--neon-blue);
  border-radius: 0 0 3px 3px;
  box-shadow: 0 0 10px var(--neon-blue);
}
.nav-tab:hover { color: var(--neon-blue); }

/* Main Content Area */
.app-main {
  flex: 1;
  padding: 20px;
  padding-bottom: 80px;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

/* Screens */
.screen { display: none; }
.screen.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ============================================
   DASHBOARD
   ============================================ */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 12px;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover { border-color: var(--neon-blue); }
.stat-value {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--neon-blue);
}
.stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 2px;
}

/* Section Headers */
.section-header {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-header svg { width: 20px; height: 20px; fill: var(--neon-orange); }

/* Game Mode Cards */
.game-modes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
.mode-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.mode-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--mode-color, var(--neon-blue));
  opacity: 0;
  transition: var(--transition);
}
.mode-card:hover {
  border-color: var(--mode-color, var(--neon-blue));
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.mode-card:hover::before { opacity: 1; }
.mode-card .mode-icon {
  font-size: 1.8rem;
  margin-bottom: 8px;
}
.mode-card .mode-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-white);
  margin-bottom: 4px;
}
.mode-card .mode-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Practice - blue */
.mode-card[data-mode="practice"] { --mode-color: var(--neon-blue); }
/* Ranked - orange */
.mode-card[data-mode="ranked"] { --mode-color: var(--neon-orange); }
/* Exam - green */
.mode-card[data-mode="exam"] { --mode-color: var(--neon-green); }
/* Royale - purple */
.mode-card[data-mode="royale"] { --mode-color: var(--neon-purple); }
/* Speed - red */
.mode-card[data-mode="speed"] { --mode-color: var(--neon-red); }
/* Imposter - yellow */
.mode-card[data-mode="imposter"] { --mode-color: var(--neon-yellow); }

/* Category Performance */
.category-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}
.category-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  transition: var(--transition);
}
.category-item:hover { border-color: var(--neon-blue); }
.cat-icon {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0, 212, 255, 0.1);
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
}
.cat-info { flex: 1; }
.cat-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-white);
}
.cat-stats {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Pipe Progress Bar */
.progress-bar {
  height: 8px;
  background: var(--bg-input);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 4px;
  position: relative;
}
.progress-bar::before {
  content: '';
  position: absolute;
  top: 0; left: 0; bottom: 0;
  width: 100%;
  background: repeating-linear-gradient(
    90deg,
    transparent 0px,
    transparent 18px,
    rgba(255,255,255,0.05) 18px,
    rgba(255,255,255,0.05) 20px
  );
  border-radius: 4px;
  z-index: 1;
}
.progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}
.progress-fill.good {
  background: linear-gradient(90deg, var(--neon-green), #00cc66);
  box-shadow: 0 0 8px rgba(0, 255, 136, 0.3);
}
.progress-fill.ok {
  background: linear-gradient(90deg, var(--neon-yellow), #ffaa00);
  box-shadow: 0 0 8px rgba(255, 221, 0, 0.3);
}
.progress-fill.bad {
  background: linear-gradient(90deg, var(--neon-red), #cc0022);
  box-shadow: 0 0 8px rgba(255, 45, 85, 0.3);
}
/* Water fill animation */
.progress-fill::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255,255,255,0.15) 50%,
    transparent 100%
  );
  animation: water-flow 2s infinite linear;
}
@keyframes water-flow {
  from { transform: translateX(-100%); }
  to { transform: translateX(100%); }
}

/* Battle Pass */
.battle-pass {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
  overflow-x: auto;
}
.bp-track {
  display: flex;
  gap: 8px;
  min-width: max-content;
  padding: 8px 0;
}
.bp-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-width: 60px;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.bp-node.unlocked {
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid rgba(0, 255, 136, 0.3);
}
.bp-node.current {
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.4);
  animation: pulse-glow 2s infinite;
}
.bp-node.locked {
  opacity: 0.4;
  border: 1px solid var(--border);
}
.bp-icon { font-size: 1.3rem; }
.bp-label {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  font-family: var(--font-heading);
}

/* ============================================
   GAME / QUESTION SCREEN
   ============================================ */

.question-screen {
  max-width: 600px;
  margin: 0 auto;
}

/* AI Opponent Banner */
.ai-opponent {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
}
.ai-avatar {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--neon-orange), var(--neon-red));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  border: 2px solid rgba(255, 107, 43, 0.5);
  box-shadow: 0 0 12px rgba(255, 107, 43, 0.3);
}
.ai-info { flex: 1; }
.ai-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--neon-orange);
  letter-spacing: 1px;
}
.ai-status {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Lives Display */
.lives-display {
  display: flex; gap: 4px;
}
.life { font-size: 1.2rem; transition: var(--transition); }
.life.lost { opacity: 0.2; filter: grayscale(100%); }

/* Question Header */
.question-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.question-progress {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.question-meta { display: flex; gap: 6px; flex-wrap: wrap; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.badge-category {
  background: rgba(0, 212, 255, 0.1);
  color: var(--neon-blue);
  border: 1px solid rgba(0, 212, 255, 0.3);
}
.badge-streak {
  background: rgba(255, 107, 43, 0.1);
  color: var(--neon-orange);
  border: 1px solid rgba(255, 107, 43, 0.3);
}
.badge-loot {
  background: rgba(0, 255, 136, 0.1);
  color: var(--neon-green);
  border: 1px solid rgba(0, 255, 136, 0.3);
  animation: loot-pulse 1.5s infinite;
}
@keyframes loot-pulse {
  0%, 100% { box-shadow: 0 0 5px rgba(0, 255, 136, 0.3); }
  50% { box-shadow: 0 0 20px rgba(0, 255, 136, 0.6); }
}

.question-score {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--neon-green);
  font-weight: 700;
  margin-bottom: 4px;
}
.question-timer {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}
.question-timer.urgent { color: var(--neon-red); animation: timer-flash 0.5s infinite; }
@keyframes timer-flash { 50% { opacity: 0.5; } }

/* Question Card */
.question-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 16px;
}
.question-text {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-white);
  margin-bottom: 20px;
  line-height: 1.6;
}

/* Option Buttons */
.options-list { display: flex; flex-direction: column; gap: 10px; }
.option-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  text-align: left;
  transition: var(--transition);
  cursor: pointer;
}
.option-btn:hover:not(.disabled) {
  border-color: var(--neon-blue);
  background: rgba(0, 212, 255, 0.05);
  transform: translateX(4px);
}
.option-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 50%;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--neon-blue);
  flex-shrink: 0;
}

/* Answer States */
.option-btn.correct {
  border-color: var(--neon-green) !important;
  background: rgba(0, 255, 136, 0.1) !important;
  animation: correct-flash 0.6s ease;
}
.option-btn.correct .option-letter {
  background: var(--neon-green);
  border-color: var(--neon-green);
  color: var(--bg-dark);
}
@keyframes correct-flash {
  0% { box-shadow: none; }
  50% { box-shadow: 0 0 30px rgba(0, 255, 136, 0.5); }
  100% { box-shadow: 0 0 10px rgba(0, 255, 136, 0.2); }
}

.option-btn.wrong {
  border-color: var(--neon-red) !important;
  background: rgba(255, 45, 85, 0.1) !important;
  animation: wrong-shake 0.4s ease;
}
.option-btn.wrong .option-letter {
  background: var(--neon-red);
  border-color: var(--neon-red);
  color: var(--text-white);
}
@keyframes wrong-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

.option-btn.disabled { pointer-events: none; opacity: 0.7; }
.option-btn.eliminated {
  opacity: 0.3;
  text-decoration: line-through;
  pointer-events: none;
}

/* Explanation */
.explanation {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}
.explanation.show {
  display: block;
  animation: slideUp 0.3s ease;
}
@keyframes slideUp { from { opacity: 0; transform: translateY(12px); } }
.exp-header {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.exp-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 8px;
  line-height: 1.6;
}
.code-ref {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  color: var(--neon-blue);
  background: rgba(0, 212, 255, 0.1);
  padding: 4px 10px;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition);
}
.code-ref:hover {
  background: rgba(0, 212, 255, 0.2);
  box-shadow: var(--glow-blue);
}

/* Question Actions */
.question-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.action-btn {
  flex: 1;
  min-width: 100px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-heading);
}
.action-btn:hover { border-color: var(--neon-blue); color: var(--neon-blue); }
.action-btn.primary {
  background: linear-gradient(135deg, var(--neon-blue), #0090ff);
  color: var(--text-white);
  border: none;
}
.action-btn.primary:hover { box-shadow: var(--glow-blue); transform: translateY(-1px); }
.action-btn.danger:hover { border-color: var(--neon-red); color: var(--neon-red); }

/* Results Card */
.results-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  max-width: 500px;
  margin: 0 auto;
}
.results-card h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--text-white);
  margin-bottom: 8px;
}
.results-score {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}
.results-stats {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin: 16px 0;
}
.results-stat .value {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-white);
}
.results-stat .label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* Badge Unlock Animation */
.badge-unlock {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid rgba(0, 255, 136, 0.4);
  border-radius: 999px;
  color: var(--neon-green);
  font-weight: 700;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  margin: 4px;
  animation: badge-glow 1.5s ease;
}
@keyframes badge-glow {
  0% { transform: scale(0.5); opacity: 0; box-shadow: 0 0 0 rgba(0,255,136,0); }
  50% { transform: scale(1.1); box-shadow: 0 0 40px rgba(0,255,136,0.5); }
  100% { transform: scale(1); opacity: 1; box-shadow: 0 0 10px rgba(0,255,136,0.2); }
}

/* ============================================
   LEADERBOARD
   ============================================ */

.leaderboard-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  padding: 4px;
  border: 1px solid var(--border);
}
.lb-tab {
  flex: 1;
  padding: 10px;
  text-align: center;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 6px;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.lb-tab.active {
  background: rgba(0, 212, 255, 0.15);
  color: var(--neon-blue);
}
.lb-tab:hover:not(.active) { color: var(--text-primary); }

.lb-your-rank {
  text-align: center;
  padding: 10px;
  margin-bottom: 12px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  color: var(--neon-blue);
  font-size: 0.9rem;
}

.lb-entry {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  transition: var(--transition);
}
.lb-entry:hover { border-color: rgba(0, 212, 255, 0.3); }
.lb-entry.you {
  border-color: var(--neon-blue);
  background: rgba(0, 212, 255, 0.05);
}
.lb-rank {
  width: 36px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
}
.lb-rank.gold { color: #ffd700; text-shadow: 0 0 8px rgba(255, 215, 0, 0.5); }
.lb-rank.silver { color: #c0c0c0; }
.lb-rank.bronze { color: #cd7f32; }
.lb-info { flex: 1; }
.lb-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-white);
}
.lb-title {
  font-size: 0.7rem;
  color: var(--text-muted);
}
.lb-score {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--neon-green);
}

.lb-show-more {
  text-align: center;
  padding: 16px;
}
.lb-show-more button {
  padding: 12px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--neon-blue);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
}
.lb-show-more button:hover { border-color: var(--neon-blue); box-shadow: var(--glow-blue); }

/* ============================================
   BADGES SCREEN
   ============================================ */

.badges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
}
.badge-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 12px;
  text-align: center;
  transition: var(--transition);
}
.badge-card.earned {
  border-color: rgba(0, 255, 136, 0.3);
}
.badge-card.earned:hover {
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.2);
  transform: translateY(-2px);
}
.badge-card.locked { opacity: 0.45; }
.badge-icon { font-size: 2rem; margin-bottom: 8px; }
.badge-card.earned .badge-icon {
  animation: badge-float 3s ease-in-out infinite;
}
@keyframes badge-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}
.badge-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-white);
  margin-bottom: 4px;
}
.badge-desc {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* ============================================
   CHAT / THE EXAMINER
   ============================================ */

.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 200px);
  max-height: 600px;
}
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.chat-msg {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.chat-msg.user { flex-direction: row-reverse; }
.chat-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}
.chat-msg.ai .chat-avatar {
  background: linear-gradient(135deg, var(--neon-orange), var(--neon-red));
}
.chat-msg.user .chat-avatar {
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
}
.chat-bubble {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  line-height: 1.5;
  white-space: pre-wrap;
}
.chat-msg.ai .chat-bubble {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.chat-msg.user .chat-bubble {
  background: linear-gradient(135deg, var(--neon-blue), #0090ff);
  color: var(--text-white);
}

.chat-input-row {
  display: flex;
  gap: 8px;
  padding: 12px 0;
}
.chat-input-row input {
  flex: 1;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
}
.chat-input-row input:focus {
  outline: none;
  border-color: var(--neon-blue);
}
.chat-input-row button {
  padding: 12px 20px;
  background: linear-gradient(135deg, var(--neon-blue), #0090ff);
  color: var(--text-white);
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-family: var(--font-heading);
  cursor: pointer;
  transition: var(--transition);
}
.chat-input-row button:hover { box-shadow: var(--glow-blue); }

/* ============================================
   CODE BOOK (codebook.html)
   ============================================ */

.codebook-layout {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}
.codebook-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: rgba(18, 18, 26, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.codebook-search {
  padding: 16px 20px;
  position: sticky;
  top: 60px;
  z-index: 50;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(12px);
}
.codebook-search input {
  width: 100%;
  padding: 14px 16px 14px 44px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}
.codebook-search input:focus {
  outline: none;
  border-color: var(--neon-blue);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}
.codebook-search .search-icon {
  position: absolute;
  left: 36px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.codebook-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

.code-section {
  margin-bottom: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.code-section.hidden { display: none; }
.code-section-header {
  padding: 16px 20px;
  background: rgba(0, 212, 255, 0.05);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}
.code-section-header:hover { background: rgba(0, 212, 255, 0.1); }
.code-section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--neon-blue);
}
.code-section-toggle {
  color: var(--text-muted);
  transition: transform 0.3s;
  font-size: 1.2rem;
}
.code-section.expanded .code-section-toggle { transform: rotate(180deg); }
.code-section-body {
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}
.code-section.expanded .code-section-body {
  padding: 20px;
  max-height: 5000px;
}

.code-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
}
.code-text h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-white);
  margin: 16px 0 8px;
  font-size: 1rem;
}
.code-text p { margin-bottom: 8px; }
.code-text ul { padding-left: 20px; margin-bottom: 8px; }
.code-text li { margin-bottom: 4px; }
.code-text table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 0.85rem;
}
.code-text table th,
.code-text table td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  text-align: left;
}
.code-text table th {
  background: rgba(0, 212, 255, 0.08);
  color: var(--neon-blue);
  font-family: var(--font-heading);
  font-weight: 700;
}

/* Search highlight */
mark, .highlight {
  background: rgba(255, 221, 0, 0.3);
  color: var(--text-white);
  padding: 1px 3px;
  border-radius: 2px;
}

.codebook-nav {
  display: flex;
  gap: 8px;
  padding: 0 20px 16px;
  overflow-x: auto;
  max-width: 900px;
  margin: 0 auto;
}
.codebook-nav a {
  flex-shrink: 0;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  font-family: var(--font-heading);
  transition: var(--transition);
  white-space: nowrap;
}
.codebook-nav a:hover, .codebook-nav a.active {
  border-color: var(--neon-blue);
  color: var(--neon-blue);
  text-decoration: none;
}

/* ============================================
   SPONSORS PAGE
   ============================================ */

.sponsors-layout {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}
.sponsors-hero {
  text-align: center;
  padding: 60px 20px 40px;
}
.sponsors-hero h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--text-white);
  margin-bottom: 12px;
}
.sponsors-hero p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

.sponsors-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.sponsor-tier {
  margin-bottom: 40px;
}
.sponsor-tier h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--neon-orange);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 1px;
}

.sponsor-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
  margin-bottom: 16px;
}
.sponsor-card.founding {
  border-color: rgba(255, 107, 43, 0.4);
  background: linear-gradient(135deg, var(--bg-card), rgba(255, 107, 43, 0.05));
}
.sponsor-card:hover { transform: translateY(-2px); }
.sponsor-logo {
  width: 120px; height: 120px;
  margin: 0 auto 16px;
  background: var(--bg-input);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
  border: 2px dashed var(--border);
}
.sponsor-card h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-white);
  margin-bottom: 8px;
}
.sponsor-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.donate-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  margin-bottom: 32px;
}
.donate-section h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--neon-green);
  margin-bottom: 12px;
}
.donate-section p {
  color: var(--text-secondary);
  margin-bottom: 20px;
}
.donate-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.donate-btn {
  padding: 12px 28px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
}
.donate-btn:hover {
  border-color: var(--neon-green);
  color: var(--neon-green);
  box-shadow: var(--glow-green);
}
.donate-btn.featured {
  background: linear-gradient(135deg, var(--neon-green), #00cc66);
  color: var(--bg-dark);
  border: none;
}

.class-mode-teaser {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
}
.class-mode-teaser h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--neon-purple);
  margin-bottom: 12px;
}
.class-mode-teaser p {
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.coming-soon-badge {
  display: inline-flex;
  padding: 6px 20px;
  background: rgba(180, 74, 255, 0.1);
  border: 1px solid rgba(180, 74, 255, 0.3);
  border-radius: 999px;
  color: var(--neon-purple);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 1px;
}

/* Shared page nav */
.page-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: rgba(18, 18, 26, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.page-nav .nav-left { display: flex; align-items: center; gap: 12px; }
.page-nav .nav-logo {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-white);
}
.page-nav .nav-logo span { color: var(--neon-blue); }
.page-nav .nav-links {
  display: flex; gap: 16px;
}
.page-nav .nav-links a {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.page-nav .nav-links a:hover, .page-nav .nav-links a.active {
  color: var(--neon-blue);
  text-decoration: none;
}

/* ============================================
   AVATAR SELECTOR
   ============================================ */
.avatar-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin: 12px 0;
}
.avatar-option {
  width: 48px; height: 48px;
  background: var(--bg-input);
  border: 2px solid var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  cursor: pointer;
  transition: var(--transition);
}
.avatar-option:hover { border-color: var(--neon-blue); transform: scale(1.1); }
.avatar-option.selected {
  border-color: var(--neon-blue);
  box-shadow: var(--glow-blue);
  background: rgba(0, 212, 255, 0.1);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 640px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .game-modes-grid { grid-template-columns: 1fr; }
  .landing-nav { padding: 16px 20px; }
  .landing-nav-links { gap: 12px; }
  .landing-nav-links a { font-size: 0.8rem; }
  .hero { padding: 40px 16px 30px; }
  .hero-icons { gap: 16px; }
  .hero-icon { width: 48px; height: 48px; }
  .hero-icon svg { width: 24px; height: 24px; }
  .results-stats { gap: 16px; }
  .badges-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
  .features-grid { grid-template-columns: 1fr; }
  .avatar-grid { grid-template-columns: repeat(5, 1fr); }
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Utility */
.mt-16 { margin-top: 16px; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }