/* ============================================
   PARKOUR QUIZ ARENA — Premium Design System
   Futuristic Neon / Glassmorphism Theme v2.0
   ============================================ */

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

:root {
  --cyan: #00f0ff;
  --magenta: #ff00e5;
  --lime: #39ff14;
  --gold: #ffd700;
  --orange: #ff6b35;
  --red: #ff3333;
  --bg-dark: #0a0a1a;
  --bg-card: rgba(15, 15, 40, 0.65);
  --bg-card-hover: rgba(20, 20, 55, 0.8);
  --bg-input: rgba(10, 10, 30, 0.8);
  --surface: rgba(255, 255, 255, 0.03);
  --border: rgba(0, 240, 255, 0.15);
  --border-hover: rgba(0, 240, 255, 0.4);
  --text-primary: #e8e8ff;
  --text-secondary: rgba(232, 232, 255, 0.6);
  --text-muted: rgba(232, 232, 255, 0.35);
  --glass-bg: rgba(15, 15, 40, 0.55);
  --glass-border: rgba(0, 240, 255, 0.12);
  --glass-blur: 20px;
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --glow-cyan: 0 0 20px rgba(0, 240, 255, 0.3), 0 0 60px rgba(0, 240, 255, 0.1);
  --glow-magenta: 0 0 20px rgba(255, 0, 229, 0.3), 0 0 60px rgba(255, 0, 229, 0.1);
  --glow-lime: 0 0 20px rgba(57, 255, 20, 0.3), 0 0 60px rgba(57, 255, 20, 0.1);
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --space-xs: 4px; --space-sm: 8px; --space-md: 16px; --space-lg: 24px; --space-xl: 40px; --space-2xl: 64px;
  --radius-sm: 8px; --radius-md: 12px; --radius-lg: 20px; --radius-xl: 28px; --radius-full: 9999px;
  --transition-fast: 0.15s ease; --transition-normal: 0.3s ease; --transition-slow: 0.5s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--font-body); background: var(--bg-dark); color: var(--text-primary); min-height: 100vh; overflow-x: hidden; line-height: 1.6; }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: linear-gradient(180deg, var(--cyan), var(--magenta)); border-radius: var(--radius-full); }

#particle-canvas { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
#app { position: relative; z-index: 1; min-height: 100vh; }

/* ── Navigation ── */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 100; display: flex; align-items: center; justify-content: space-between; padding: 12px 32px; background: rgba(10, 10, 26, 0.9); backdrop-filter: blur(var(--glass-blur)); border-bottom: 1px solid var(--glass-border); }
.navbar-brand { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; background: linear-gradient(135deg, var(--cyan), var(--magenta)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: 1px; cursor: pointer; transition: var(--transition-normal); }
.navbar-brand:hover { filter: brightness(1.3); }
.navbar-nav { display: flex; gap: var(--space-sm); list-style: none; }
.nav-link { font-family: var(--font-body); font-size: 0.85rem; font-weight: 500; color: var(--text-secondary); text-decoration: none; padding: 8px 16px; border-radius: var(--radius-sm); transition: var(--transition-fast); cursor: pointer; border: none; background: none; }
.nav-link:hover, .nav-link.active { color: var(--cyan); background: rgba(0, 240, 255, 0.08); }
.nav-coins { display: flex; align-items: center; gap: 6px; font-family: var(--font-display); font-size: 0.85rem; color: var(--gold); padding: 6px 14px; background: rgba(255, 215, 0, 0.08); border: 1px solid rgba(255, 215, 0, 0.2); border-radius: var(--radius-full); }
.nav-coins .coin-icon { font-size: 1rem; }

/* ── Page ── */
.page { display: none; padding-top: 80px; min-height: 100vh; animation: pageFadeIn 0.4s ease; }
.page.active { display: block; }
@keyframes pageFadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* ── Landing Page ── */
.landing-hero { display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; min-height: calc(100vh - 80px); padding: var(--space-xl); }
.hero-title { font-family: var(--font-display); font-size: clamp(2rem, 5vw, 4rem); font-weight: 900; line-height: 1.1; margin-bottom: var(--space-md); background: linear-gradient(135deg, var(--cyan) 0%, var(--magenta) 50%, var(--lime) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; animation: heroGlow 3s ease-in-out infinite alternate; }
@keyframes heroGlow { 0% { filter: drop-shadow(0 0 20px rgba(0,240,255,0.3)); } 100% { filter: drop-shadow(0 0 40px rgba(255,0,229,0.4)); } }
.hero-subtitle { font-size: clamp(1rem, 2vw, 1.3rem); color: var(--text-secondary); max-width: 600px; margin-bottom: var(--space-xl); }
.hero-actions { display: flex; gap: var(--space-md); flex-wrap: wrap; justify-content: center; }
.hero-features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--space-lg); max-width: 900px; margin-top: var(--space-2xl); width: 100%; }
.feature-card { background: var(--glass-bg); backdrop-filter: blur(var(--glass-blur)); border: 1px solid var(--glass-border); border-radius: var(--radius-lg); padding: var(--space-lg); text-align: center; transition: var(--transition-normal); }
.feature-card:hover { transform: translateY(-4px); border-color: var(--border-hover); box-shadow: var(--glow-cyan); }
.feature-card .feature-icon { font-size: 2.5rem; margin-bottom: var(--space-md); }
.feature-card h3 { font-family: var(--font-display); font-size: 0.9rem; color: var(--cyan); margin-bottom: var(--space-sm); }
.feature-card p { font-size: 0.85rem; color: var(--text-secondary); }

/* ── Buttons ── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-family: var(--font-display); font-size: 0.85rem; font-weight: 600; padding: 12px 28px; border-radius: var(--radius-md); border: 1px solid transparent; cursor: pointer; transition: var(--transition-normal); text-decoration: none; letter-spacing: 0.5px; position: relative; overflow: hidden; }
.btn::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent); opacity: 0; transition: var(--transition-fast); }
.btn:hover::before { opacity: 1; }
.btn-primary { background: linear-gradient(135deg, var(--cyan), #0088ff); color: #000; border-color: var(--cyan); box-shadow: 0 4px 20px rgba(0, 240, 255, 0.25); }
.btn-primary:hover { box-shadow: 0 6px 30px rgba(0, 240, 255, 0.4); transform: translateY(-2px); }
.btn-secondary { background: transparent; color: var(--magenta); border-color: var(--magenta); }
.btn-secondary:hover { background: rgba(255, 0, 229, 0.1); box-shadow: var(--glow-magenta); transform: translateY(-2px); }
.btn-success { background: linear-gradient(135deg, var(--lime), #00cc44); color: #000; border-color: var(--lime); box-shadow: 0 4px 20px rgba(57, 255, 20, 0.25); }
.btn-success:hover { box-shadow: 0 6px 30px rgba(57, 255, 20, 0.4); transform: translateY(-2px); }
.btn-danger { background: linear-gradient(135deg, var(--red), #cc0000); color: #fff; border-color: var(--red); }
.btn-danger:hover { box-shadow: 0 6px 30px rgba(255, 51, 51, 0.4); transform: translateY(-2px); }
.btn-gold { background: linear-gradient(135deg, var(--gold), var(--orange)); color: #000; border-color: var(--gold); box-shadow: 0 4px 20px rgba(255, 215, 0, 0.25); }
.btn-gold:hover { box-shadow: 0 6px 30px rgba(255, 215, 0, 0.4); transform: translateY(-2px); }
.btn-sm { font-size: 0.75rem; padding: 8px 18px; }
.btn-lg { font-size: 1rem; padding: 16px 36px; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none !important; }

/* ── Glass Card ── */
.glass-card { background: var(--glass-bg); backdrop-filter: blur(var(--glass-blur)); border: 1px solid var(--glass-border); border-radius: var(--radius-lg); padding: var(--space-lg); box-shadow: var(--glass-shadow); }
.glass-card-hover:hover { border-color: var(--border-hover); box-shadow: var(--glow-cyan); transform: translateY(-2px); transition: var(--transition-normal); }

/* ── Form Elements ── */
.form-group { margin-bottom: var(--space-md); }
.form-label { display: block; font-family: var(--font-display); font-size: 0.7rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: var(--space-sm); }
.form-input { width: 100%; padding: 12px 16px; font-family: var(--font-body); font-size: 0.95rem; color: var(--text-primary); background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius-md); outline: none; transition: var(--transition-fast); }
.form-input:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.1); }
.form-input::placeholder { color: var(--text-muted); }
.form-select { width: 100%; padding: 12px 16px; font-family: var(--font-body); font-size: 0.95rem; color: var(--text-primary); background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius-md); outline: none; appearance: none; cursor: pointer; transition: var(--transition-fast); }
.form-select:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.1); }

/* ── Professional Auth Page ── */
.auth-container { display: flex; align-items: center; justify-content: center; min-height: calc(100vh - 80px); padding: var(--space-xl); }
.auth-card { width: 100%; max-width: 500px; position: relative; overflow: hidden; }
.auth-card::before { content: ''; position: absolute; top: -2px; left: -2px; right: -2px; bottom: -2px; background: linear-gradient(135deg, var(--cyan), var(--magenta), var(--lime), var(--cyan)); border-radius: calc(var(--radius-lg) + 2px); z-index: -1; background-size: 300% 300%; animation: gradientBorder 4s ease infinite; }
@keyframes gradientBorder { 0%{background-position:0% 50%} 50%{background-position:100% 50%} 100%{background-position:0% 50%} }
.auth-header { text-align: center; margin-bottom: var(--space-lg); }
.auth-header .auth-logo { font-size: 3rem; margin-bottom: var(--space-sm); display: block; }
.auth-card h2 { font-family: var(--font-display); font-size: 1.5rem; text-align: center; margin-bottom: var(--space-sm); background: linear-gradient(135deg, var(--cyan), var(--magenta)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.auth-card .auth-subtitle { text-align: center; color: var(--text-secondary); font-size: 0.9rem; margin-bottom: var(--space-lg); }
.auth-stats { display: flex; justify-content: center; gap: var(--space-xl); margin-bottom: var(--space-lg); padding: var(--space-md) 0; border-top: 1px solid var(--glass-border); border-bottom: 1px solid var(--glass-border); }
.auth-stat { text-align: center; }
.auth-stat-value { font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; color: var(--cyan); }
.auth-stat-label { font-size: 0.65rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.auth-tabs { display: flex; gap: 4px; margin-bottom: var(--space-lg); background: rgba(0, 0, 0, 0.3); border-radius: var(--radius-md); padding: 4px; }
.auth-tab { flex: 1; padding: 10px; font-family: var(--font-display); font-size: 0.7rem; font-weight: 600; color: var(--text-secondary); background: none; border: none; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition-fast); text-transform: uppercase; letter-spacing: 1px; }
.auth-tab.active { color: var(--cyan); background: rgba(0, 240, 255, 0.1); box-shadow: 0 0 15px rgba(0,240,255,0.1); }
.auth-tab:hover:not(.active) { color: var(--text-primary); }
.auth-footer { text-align: center; margin-top: var(--space-md); font-size: 0.85rem; color: var(--text-secondary); }
.auth-footer a { color: var(--cyan); cursor: pointer; text-decoration: none; }
.auth-footer a:hover { text-decoration: underline; }
.teacher-request-status { text-align: center; padding: var(--space-lg); }
.teacher-request-status .status-icon { font-size: 3rem; margin-bottom: var(--space-md); display: block; }

/* ── Teacher Dashboard ── */
.dashboard { padding: var(--space-xl) var(--space-lg); max-width: 1200px; margin: 0 auto; }
.dashboard-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-xl); flex-wrap: wrap; gap: var(--space-md); }
.dashboard-header h1 { font-family: var(--font-display); font-size: 1.5rem; background: linear-gradient(135deg, var(--cyan), var(--magenta)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.dashboard-tabs { display: flex; gap: 4px; background: rgba(0, 0, 0, 0.3); border-radius: var(--radius-md); padding: 4px; margin-bottom: var(--space-lg); }
.dashboard-tab { padding: 10px 20px; font-family: var(--font-display); font-size: 0.7rem; font-weight: 600; color: var(--text-secondary); background: none; border: none; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition-fast); text-transform: uppercase; letter-spacing: 1px; }
.dashboard-tab.active { color: var(--cyan); background: rgba(0, 240, 255, 0.1); }
.quiz-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: var(--space-lg); }
.quiz-card { cursor: pointer; transition: var(--transition-normal); }
.quiz-card:hover { transform: translateY(-4px); }
.quiz-card h3 { font-family: var(--font-display); font-size: 1rem; color: var(--cyan); margin-bottom: var(--space-xs); }
.quiz-card .quiz-meta { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: var(--space-md); }
.quiz-card .quiz-stats { display: flex; gap: var(--space-md); font-size: 0.8rem; color: var(--text-muted); }
.quiz-card .quiz-actions { display: flex; gap: var(--space-sm); margin-top: var(--space-md); }

/* Question Editor */
.question-editor { max-width: 700px; margin: 0 auto; }
.question-item { margin-bottom: var(--space-md); border-left: 3px solid var(--cyan); padding-left: var(--space-md); }
.question-item .q-number { font-family: var(--font-display); font-size: 0.7rem; color: var(--magenta); text-transform: uppercase; letter-spacing: 1px; margin-bottom: var(--space-sm); }
.options-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-sm); }
.option-input-wrapper { display: flex; align-items: center; gap: var(--space-sm); }
.option-input-wrapper .option-label { font-family: var(--font-display); font-size: 0.7rem; font-weight: 700; color: var(--text-secondary); min-width: 20px; }
.correct-selector { display: flex; gap: var(--space-sm); margin-top: var(--space-sm); }
.correct-btn { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-size: 0.7rem; font-weight: 700; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--bg-input); color: var(--text-secondary); cursor: pointer; transition: var(--transition-fast); }
.correct-btn.active { background: var(--lime); color: #000; border-color: var(--lime); }
.game-control-panel { text-align: center; }
.game-code-display { font-family: var(--font-display); font-size: 3rem; font-weight: 900; letter-spacing: 8px; color: var(--gold); text-shadow: 0 0 30px rgba(255, 215, 0, 0.4); margin: var(--space-lg) 0; }
.player-list { display: flex; flex-wrap: wrap; gap: var(--space-sm); justify-content: center; margin: var(--space-lg) 0; }
.player-chip { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; background: rgba(0, 240, 255, 0.08); border: 1px solid rgba(0, 240, 255, 0.2); border-radius: var(--radius-full); font-size: 0.85rem; color: var(--cyan); animation: chipIn 0.3s ease; }
@keyframes chipIn { from { opacity: 0; transform: scale(0.8); } to { opacity: 1; transform: scale(1); } }

/* Analytics / Leaderboard */
.leaderboard-table { width: 100%; border-collapse: collapse; }
.leaderboard-table th { font-family: var(--font-display); font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; color: var(--text-secondary); padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); }
.leaderboard-table td { padding: 12px 16px; font-size: 0.9rem; border-bottom: 1px solid rgba(255, 255, 255, 0.03); }
.leaderboard-table tr:hover { background: rgba(0, 240, 255, 0.03); }
.rank-badge { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: 50%; font-family: var(--font-display); font-size: 0.7rem; font-weight: 700; }
.rank-1 { background: var(--gold); color: #000; box-shadow: 0 0 15px rgba(255,215,0,0.4); }
.rank-2 { background: #c0c0c0; color: #000; }
.rank-3 { background: #cd7f32; color: #000; }

/* ── Global Leaderboard Page ── */
.leaderboard-container { padding: var(--space-xl) var(--space-lg); max-width: 900px; margin: 0 auto; }
.leaderboard-header { text-align: center; margin-bottom: var(--space-xl); }
.leaderboard-header h1 { font-family: var(--font-display); font-size: 1.8rem; background: linear-gradient(135deg, var(--gold), var(--orange)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: var(--space-sm); }
.leaderboard-tabs { display: flex; gap: 4px; background: rgba(0,0,0,0.3); border-radius: var(--radius-md); padding: 4px; margin-bottom: var(--space-lg); max-width: 400px; margin-left: auto; margin-right: auto; }
.leaderboard-tab { flex: 1; padding: 10px; font-family: var(--font-display); font-size: 0.65rem; font-weight: 600; color: var(--text-secondary); background: none; border: none; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition-fast); text-transform: uppercase; letter-spacing: 1px; }
.leaderboard-tab.active { color: var(--gold); background: rgba(255,215,0,0.1); }
.podium { display: flex; justify-content: center; align-items: flex-end; gap: var(--space-md); margin-bottom: var(--space-xl); min-height: 200px; }
.podium-item { text-align: center; transition: var(--transition-normal); }
.podium-item:hover { transform: translateY(-4px); }
.podium-bar { width: 100px; border-radius: var(--radius-md) var(--radius-md) 0 0; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; padding: var(--space-md) var(--space-sm); position: relative; }
.podium-rank { font-family: var(--font-display); font-size: 2rem; font-weight: 900; position: absolute; top: -30px; }
.podium-name { font-family: var(--font-display); font-size: 0.7rem; color: #000; font-weight: 700; margin-bottom: 4px; max-width: 90px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.podium-score { font-family: var(--font-display); font-size: 0.85rem; font-weight: 900; color: #000; }
.podium-1st .podium-bar { height: 160px; background: linear-gradient(180deg, var(--gold), var(--orange)); box-shadow: 0 0 30px rgba(255,215,0,0.3); }
.podium-2nd .podium-bar { height: 120px; background: linear-gradient(180deg, #e0e0e0, #a0a0a0); }
.podium-3rd .podium-bar { height: 90px; background: linear-gradient(180deg, #cd7f32, #a0602a); }

/* ── Student / Join Page ── */
.student-container { display: flex; align-items: center; justify-content: center; min-height: calc(100vh - 80px); padding: var(--space-xl); }
.join-card { width: 100%; max-width: 440px; text-align: center; }
.join-card h2 { font-family: var(--font-display); font-size: 1.5rem; background: linear-gradient(135deg, var(--cyan), var(--lime)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: var(--space-lg); }
.code-input { font-family: var(--font-display) !important; font-size: 2rem !important; text-align: center; letter-spacing: 8px; text-transform: uppercase; }
.lobby-container { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: calc(100vh - 80px); padding: var(--space-xl); text-align: center; }
.lobby-container h2 { font-family: var(--font-display); font-size: 1.3rem; color: var(--cyan); margin-bottom: var(--space-md); }
.lobby-spinner { width: 60px; height: 60px; border: 3px solid var(--border); border-top-color: var(--cyan); border-radius: 50%; animation: spin 1s linear infinite; margin: var(--space-lg) auto; }
@keyframes spin { to { transform: rotate(360deg); } }
.lobby-pulse { display: inline-block; animation: pulse 2s ease-in-out infinite; color: var(--text-secondary); font-size: 0.9rem; }
@keyframes pulse { 0%, 100% { opacity: 0.4; } 50% { opacity: 1; } }

/* ── Game HUD ── */
.game-container { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 200; background: #000; }
#game-canvas { width: 100%; height: 100%; display: block; }
.game-hud { position: absolute; top: 0; left: 0; right: 0; bottom: 0; pointer-events: none; z-index: 201; }
.hud-top { display: flex; justify-content: space-between; align-items: flex-start; padding: var(--space-md) var(--space-lg); }
.hud-score { font-family: var(--font-display); font-size: 1.2rem; color: var(--gold); text-shadow: 0 0 10px rgba(255, 215, 0, 0.5); }
.hud-streak { font-family: var(--font-display); font-size: 0.8rem; color: var(--magenta); text-shadow: 0 0 10px rgba(255, 0, 229, 0.5); }
.hud-coins { font-family: var(--font-display); font-size: 1rem; color: var(--gold); display: flex; align-items: center; gap: 6px; }
.hud-timer { position: absolute; top: var(--space-md); left: 50%; transform: translateX(-50%); text-align: center; }
.timer-bar-bg { width: 300px; height: 6px; background: rgba(255, 255, 255, 0.1); border-radius: var(--radius-full); overflow: hidden; }
.timer-bar { height: 100%; background: linear-gradient(90deg, var(--cyan), var(--magenta)); border-radius: var(--radius-full); transition: width 0.3s linear; }
.timer-text { font-family: var(--font-display); font-size: 1.5rem; color: var(--text-primary); margin-bottom: 6px; }

/* Question bar — repositioned to TOP so it doesn't overlay the player */
.hud-question { position: absolute; top: 60px; left: 50%; transform: translateX(-50%); width: 90%; max-width: 700px; text-align: center; background: rgba(0, 0, 0, 0.65); backdrop-filter: blur(10px); border: 1px solid var(--glass-border); border-radius: var(--radius-lg); padding: var(--space-md) var(--space-lg); pointer-events: auto; }
.hud-question-text { font-family: var(--font-display); font-size: 0.95rem; color: var(--text-primary); margin-bottom: var(--space-sm); }
.hud-options { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-sm); }
.hud-option-label { font-size: 0.75rem; color: var(--text-secondary); padding: 8px 12px; background: rgba(255, 255, 255, 0.05); border-radius: var(--radius-sm); border: 1px solid rgba(255, 255, 255, 0.08); pointer-events: auto; cursor: pointer; transition: var(--transition-fast); }
.hud-option-label:hover { background: rgba(255,255,255,0.1); }
.hud-option-label.opt-a { border-left: 3px solid var(--cyan); }
.hud-option-label.opt-b { border-left: 3px solid var(--magenta); }
.hud-option-label.opt-c { border-left: 3px solid var(--lime); }
.hud-option-label.opt-d { border-left: 3px solid var(--gold); }

/* Mobile game controls */
.mobile-controls { position: absolute; bottom: 20px; left: 0; right: 0; display: flex; justify-content: space-between; padding: 0 20px; pointer-events: auto; z-index: 202; }
.mobile-controls.hidden { display: none; }
.mobile-dpad { display: flex; flex-direction: column; gap: 4px; align-items: center; }
.mobile-dpad-row { display: flex; gap: 4px; }
.mobile-btn { width: 56px; height: 56px; border-radius: 50%; background: rgba(0,240,255,0.15); border: 2px solid rgba(0,240,255,0.4); color: var(--cyan); font-size: 1.2rem; display: flex; align-items: center; justify-content: center; cursor: pointer; -webkit-tap-highlight-color: transparent; user-select: none; touch-action: manipulation; }
.mobile-btn:active { background: rgba(0,240,255,0.3); transform: scale(0.9); }
.mobile-btn-jump { width: 72px; height: 72px; background: rgba(57,255,20,0.15); border-color: rgba(57,255,20,0.4); color: var(--lime); font-family: var(--font-display); font-size: 0.7rem; }
.mobile-btn-dash { width: 56px; height: 56px; background: rgba(255,0,229,0.15); border-color: rgba(255,0,229,0.4); color: var(--magenta); font-family: var(--font-display); font-size: 0.6rem; }
.mobile-action-btns { display: flex; flex-direction: column; gap: 8px; align-items: flex-end; }

/* Game results overlay */
.game-results-overlay { position: fixed; inset: 0; z-index: 3000; display: flex; align-items: center; justify-content: center; background: rgba(10, 10, 26, 0.9); backdrop-filter: blur(15px); animation: fadeIn 0.5s ease; }
.game-results-card { text-align: center; max-width: 550px; width: 90%; padding: 40px; animation: slideUp 0.6s ease; }
.game-results-card h2 { font-family: var(--font-display); font-size: 1.6rem; color: var(--gold); margin-bottom: 24px; }
.results-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 16px; }
.result-stat { background: rgba(255, 255, 255, 0.03); border: 1px solid var(--glass-border); border-radius: var(--radius-md); padding: 16px; text-align: center; }
.result-stat-value { font-family: var(--font-display); font-size: 1.6rem; font-weight: 900; color: var(--cyan); }
.result-stat-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-top: 4px; }
.results-actions { display: flex; gap: var(--space-sm); justify-content: center; flex-wrap: wrap; margin-top: var(--space-lg); }

/* Floating feedback */
.feedback-float { position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%); font-family: var(--font-display); font-size: 3rem; font-weight: 900; z-index: 250; pointer-events: none; animation: feedbackPop 0.8s ease forwards; }
.feedback-correct { color: var(--lime); text-shadow: 0 0 40px rgba(57, 255, 20, 0.6); }
.feedback-wrong { color: var(--red); text-shadow: 0 0 40px rgba(255, 51, 51, 0.6); }
@keyframes feedbackPop { 0% { opacity: 0; transform: translate(-50%, -50%) scale(0.5); } 30% { opacity: 1; transform: translate(-50%, -50%) scale(1.2); } 100% { opacity: 0; transform: translate(-50%, -70%) scale(1); } }
.coin-float { position: fixed; font-family: var(--font-display); font-size: 1.2rem; color: var(--gold); z-index: 250; pointer-events: none; animation: coinUp 1s ease forwards; }
@keyframes coinUp { 0% { opacity: 1; transform: translateY(0); } 100% { opacity: 0; transform: translateY(-80px); } }

/* Confetti */
.confetti-piece { position: fixed; width: 10px; height: 10px; z-index: 9999; pointer-events: none; animation: confettiFall 3s ease-out forwards; }
@keyframes confettiFall { 0% { opacity: 1; transform: translateY(0) rotate(0deg) scale(1); } 100% { opacity: 0; transform: translateY(100vh) rotate(720deg) scale(0.3); } }

/* ── Shop Page ── */
.shop-container { padding: var(--space-xl) var(--space-lg); max-width: 1000px; margin: 0 auto; }
.shop-header { text-align: center; margin-bottom: var(--space-xl); }
.shop-header h1 { font-family: var(--font-display); font-size: 1.8rem; background: linear-gradient(135deg, var(--gold), var(--orange)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: var(--space-sm); }
.shop-balance { font-family: var(--font-display); font-size: 1.3rem; color: var(--gold); }
.shop-section-title { font-family: var(--font-display); font-size: 1rem; color: var(--text-primary); margin-bottom: var(--space-md); padding-bottom: var(--space-sm); border-bottom: 1px solid var(--border); }
.shop-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: var(--space-md); margin-bottom: var(--space-xl); }
.shop-item { text-align: center; padding: var(--space-lg) var(--space-md); transition: var(--transition-normal); cursor: pointer; }
.shop-item:hover { transform: translateY(-4px); border-color: var(--border-hover); }
.shop-item-preview { width: 60px; height: 60px; border-radius: 50%; margin: 0 auto var(--space-md); border: 2px solid var(--border); }
.shop-item-name { font-family: var(--font-display); font-size: 0.75rem; color: var(--text-primary); margin-bottom: var(--space-xs); }
.shop-item-price { font-family: var(--font-display); font-size: 0.7rem; color: var(--gold); margin-bottom: var(--space-sm); }
.shop-item .btn { width: 100%; }
.equipped-badge { display: inline-block; padding: 4px 12px; font-family: var(--font-display); font-size: 0.65rem; font-weight: 700; color: var(--lime); background: rgba(57, 255, 20, 0.1); border: 1px solid rgba(57, 255, 20, 0.3); border-radius: var(--radius-full); }

/* ── Toast Notifications ── */
.toast-container { position: fixed; top: 80px; right: 20px; z-index: 1000; display: flex; flex-direction: column; gap: var(--space-sm); }
.toast { padding: 12px 20px; border-radius: var(--radius-md); font-size: 0.85rem; animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards; backdrop-filter: blur(10px); border: 1px solid; max-width: 350px; }
.toast-success { background: rgba(57, 255, 20, 0.1); border-color: rgba(57, 255, 20, 0.3); color: var(--lime); }
.toast-error { background: rgba(255, 51, 51, 0.1); border-color: rgba(255, 51, 51, 0.3); color: var(--red); }
.toast-info { background: rgba(0, 240, 255, 0.1); border-color: rgba(0, 240, 255, 0.3); color: var(--cyan); }
@keyframes toastIn { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes toastOut { from { opacity: 1; } to { opacity: 0; transform: translateX(40px); } }

/* ── Modal ── */
.modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0, 0, 0, 0.6); backdrop-filter: blur(5px); z-index: 500; display: flex; align-items: center; justify-content: center; animation: pageFadeIn 0.2s ease; }
.modal { width: 90%; max-width: 550px; max-height: 85vh; overflow-y: auto; background: var(--bg-dark); border: 1px solid var(--glass-border); border-radius: var(--radius-lg); padding: var(--space-xl); }
.modal h3 { font-family: var(--font-display); font-size: 1.1rem; color: var(--cyan); margin-bottom: var(--space-lg); }
.modal-actions { display: flex; gap: var(--space-sm); justify-content: flex-end; margin-top: var(--space-lg); }

/* ── Misc Utils ── */
.text-center { text-align: center; }
.text-cyan { color: var(--cyan); }
.text-magenta { color: var(--magenta); }
.text-lime { color: var(--lime); }
.text-gold { color: var(--gold); }
.text-secondary { color: var(--text-secondary); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.gap-sm { gap: var(--space-sm); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.w-full { width: 100%; }
.hidden { display: none !important; }

/* ── Game Start Overlay ── */
.game-start-overlay { position: fixed; inset: 0; z-index: 2000; display: flex; align-items: center; justify-content: center; background: rgba(10, 10, 26, 0.85); backdrop-filter: blur(12px); animation: fadeIn 0.5s ease; }
.game-start-overlay.hidden { display: none; }
.start-screen-content { text-align: center; max-width: 500px; width: 90%; padding: 40px; background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius-xl); box-shadow: var(--glass-shadow); animation: slideUp 0.6s ease; }
@keyframes slideUp { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ── Keyboard hint ── */
.keyboard-hint { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); font-family: var(--font-display); font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 2px; animation: pulse 2s ease-in-out infinite; }
.keyboard-hint kbd { display: inline-block; padding: 4px 10px; background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.15); border-radius: 4px; font-family: var(--font-display); margin: 0 4px; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .navbar { padding: 10px 16px; }
  .navbar-brand { font-size: 0.9rem; }
  .nav-link { font-size: 0.75rem; padding: 6px 10px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-features { grid-template-columns: 1fr; max-width: 350px; }
  .dashboard { padding: var(--space-lg) var(--space-md); }
  .quiz-grid { grid-template-columns: 1fr; }
  .options-grid { grid-template-columns: 1fr; }
  .hud-options { grid-template-columns: 1fr; }
  .hud-question { top: 50px; padding: var(--space-sm) var(--space-md); }
  .hud-question-text { font-size: 0.8rem; }
  .shop-grid { grid-template-columns: repeat(2, 1fr); }
  .results-stats { grid-template-columns: 1fr; }
  .timer-bar-bg { width: 200px; }
  .game-code-display { font-size: 2rem; letter-spacing: 4px; }
  .podium-bar { width: 80px; }
  .podium-1st .podium-bar { height: 120px; }
  .podium-2nd .podium-bar { height: 90px; }
  .podium-3rd .podium-bar { height: 70px; }
  .auth-stats { gap: var(--space-lg); }
  .auth-card { max-width: 95%; }
}

@media (max-width: 480px) {
  .shop-grid { grid-template-columns: 1fr; }
  .navbar-nav { gap: 2px; }
  .podium { gap: var(--space-sm); }
  .podium-bar { width: 65px; }
}

/* ── Animations ── */
@keyframes float {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes pulseGlow {
  0%,100% { box-shadow: 0 0 10px rgba(0,240,255,0.2); }
  50% { box-shadow: 0 0 25px rgba(0,240,255,0.4), 0 0 50px rgba(0,240,255,0.15); }
}

/* ── Game Results Overlay ── */
.game-results-overlay {
  position: fixed; inset: 0; z-index: 200;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.85); backdrop-filter: blur(12px);
  animation: fadeIn 0.5s ease;
}
.game-results-card {
  max-width: 450px; width: 90%; padding: 32px; text-align: center;
  animation: slideUp 0.6s ease;
}
.game-results-card h2 {
  font-family: var(--font-display); font-size: 1.5rem;
  background: linear-gradient(135deg, var(--gold), var(--orange));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 20px;
}
.results-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 20px 0;
}
.result-stat { text-align: center; }
.result-stat-value {
  font-family: var(--font-display); font-size: 1.4rem; color: var(--cyan);
}
.result-stat-label {
  font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase;
  font-family: var(--font-display); letter-spacing: 1px; margin-top: 4px;
}
.results-actions { margin-top: 20px; }

/* ── HUD Option Labels ── */
.hud-option-label {
  padding: 10px 16px; border-radius: 8px; cursor: pointer;
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
  transition: all 0.2s ease; font-size: 0.9rem;
}
.hud-option-label:hover {
  background: rgba(0,240,255,0.1); border-color: var(--cyan);
  transform: translateX(4px);
}
.hud-options { display: grid; gap: 8px; margin-top: 12px; }
.hud-question { max-width: 500px; margin: 0 auto; }

/* ── Game Start Overlay ── */
.game-start-overlay {
  position: absolute; inset: 0; z-index: 20;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.7); backdrop-filter: blur(8px);
}
.game-start-overlay.hidden { display: none; }
.start-screen-content { text-align: center; padding: 40px; }

/* ── Mobile Touch Buttons ── */
.mobile-btn { -webkit-tap-highlight-color: transparent; touch-action: manipulation; user-select: none; }
.mobile-btn:active { transform: scale(0.9); opacity: 0.7; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(30px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }