* { margin: 0; padding: 0; box-sizing: border-box; }
.hidden { display: none !important; }

/* ==================== THEME VARIABLES ==================== */
:root, [data-theme="cosmic"] {
  --bg-dark: #0f0e17;
  --bg-card: #1a1932;
  --bg-card-hover: #232147;
  --primary: #7c5cfc;
  --primary-light: #a78bfa;
  --primary-glow: rgba(124, 92, 252, 0.4);
  --secondary: #2dd4bf;
  --accent-pink: #f472b6;
  --accent-orange: #fb923c;
  --accent-yellow: #fbbf24;
  --text: #e8e6f0;
  --text-dim: #9490b3;
  --success: #34d399;
  --danger: #f87171;
  --border: #2a2750;
  --bg-code: #0d0c1a;
  --text-code: #e8e6f0;
  --sidebar-bg: linear-gradient(180deg, #1a1840 0%, #13112a 100%);
  --particle-color: rgba(124, 92, 252, 0.3);
  --card-gradient: linear-gradient(135deg, rgba(124,92,252,0.05), transparent);
  --level-gradient: linear-gradient(90deg, var(--primary), var(--secondary));
  --font-main: 'Fredoka', 'Segoe UI', system-ui, sans-serif;
  --sidebar-width: 220px;
  --radius: 16px;
  --radius-sm: 10px;
}

[data-theme="ocean"] {
  --bg-dark: #0a1628;
  --bg-card: #112240;
  --bg-card-hover: #1a3358;
  --primary: #00b4d8;
  --primary-light: #48cae4;
  --primary-glow: rgba(0, 180, 216, 0.4);
  --secondary: #90e0ef;
  --accent-pink: #f72585;
  --accent-orange: #ff8fab;
  --accent-yellow: #f9c74f;
  --border: #1e3a5f;
  --bg-code: #0a1020;
  --text-code: #e0e8f0;
  --sidebar-bg: linear-gradient(180deg, #0d1f3c 0%, #091428 100%);
  --particle-color: rgba(0, 180, 216, 0.3);
  --card-gradient: linear-gradient(135deg, rgba(0,180,216,0.05), transparent);
  --level-gradient: linear-gradient(90deg, #0077b6, #00b4d8, #90e0ef);
}

[data-theme="jungle"] {
  --bg-dark: #0d1f0d;
  --bg-card: #1a331a;
  --bg-card-hover: #264d26;
  --primary: #4caf50;
  --primary-light: #81c784;
  --primary-glow: rgba(76, 175, 80, 0.4);
  --secondary: #aed581;
  --accent-pink: #ff7043;
  --accent-orange: #ffb74d;
  --accent-yellow: #fff176;
  --border: #2e5c2e;
  --bg-code: #0a1a0a;
  --text-code: #e0f0e0;
  --sidebar-bg: linear-gradient(180deg, #1a3d1a 0%, #0d1f0d 100%);
  --particle-color: rgba(76, 175, 80, 0.3);
  --card-gradient: linear-gradient(135deg, rgba(76,175,80,0.05), transparent);
  --level-gradient: linear-gradient(90deg, #2e7d32, #66bb6a, #aed581);
}

[data-theme="dragon"] {
  --bg-dark: #1a0a0a;
  --bg-card: #2d1515;
  --bg-card-hover: #3d1f1f;
  --primary: #ef5350;
  --primary-light: #ef9a9a;
  --primary-glow: rgba(239, 83, 80, 0.4);
  --secondary: #ffab40;
  --accent-pink: #f48fb1;
  --accent-orange: #ff7043;
  --accent-yellow: #ffd54f;
  --border: #4a2020;
  --bg-code: #1a0808;
  --text-code: #f0e0e0;
  --sidebar-bg: linear-gradient(180deg, #2a1010 0%, #1a0808 100%);
  --particle-color: rgba(239, 83, 80, 0.3);
  --card-gradient: linear-gradient(135deg, rgba(239,83,80,0.05), transparent);
  --level-gradient: linear-gradient(90deg, #c62828, #ef5350, #ffab40);
}

[data-theme="candy"] {
  --bg-dark: #1a0d2e;
  --bg-card: #2a1548;
  --bg-card-hover: #3a1f60;
  --primary: #e040fb;
  --primary-light: #ea80fc;
  --primary-glow: rgba(224, 64, 251, 0.4);
  --secondary: #00e5ff;
  --accent-pink: #ff4081;
  --accent-orange: #ff6e40;
  --accent-yellow: #ffea00;
  --border: #3d1a66;
  --bg-code: #1a0a30;
  --text-code: #f0e0f8;
  --sidebar-bg: linear-gradient(180deg, #2a1248 0%, #1a0a30 100%);
  --particle-color: rgba(224, 64, 251, 0.3);
  --card-gradient: linear-gradient(135deg, rgba(224,64,251,0.05), transparent);
  --level-gradient: linear-gradient(90deg, #e040fb, #00e5ff);
}

[data-theme="arctic"] {
  --bg-dark: #e8edf2;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f4f8;
  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --primary-glow: rgba(59, 130, 246, 0.3);
  --secondary: #06b6d4;
  --accent-pink: #ec4899;
  --accent-orange: #f97316;
  --accent-yellow: #eab308;
  --text: #1e293b;
  --text-dim: #64748b;
  --success: #22c55e;
  --danger: #ef4444;
  --border: #cbd5e1;
  --bg-code: #1e293b;
  --text-code: #e2e8f0;
  --sidebar-bg: linear-gradient(180deg, #f1f5f9 0%, #e2e8f0 100%);
  --particle-color: rgba(59, 130, 246, 0.2);
  --card-gradient: linear-gradient(135deg, rgba(59,130,246,0.04), transparent);
  --level-gradient: linear-gradient(90deg, #3b82f6, #06b6d4);
}

/* ==================== BASE ==================== */
body {
  font-family: var(--font-main);
  background: var(--bg-dark);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.5s, color 0.5s;
}

#particles {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

#app {
  display: flex;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

.confetti-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 500;
  pointer-events: none;
}

/* ==================== ANIMATIONS ==================== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes popIn {
  0% { opacity: 0; transform: scale(0.5); }
  70% { transform: scale(1.08); }
  100% { opacity: 1; transform: scale(1); }
}
@keyframes bounceIn {
  0% { transform: scale(0); }
  50% { transform: scale(1.3); }
  70% { transform: scale(0.9); }
  100% { transform: scale(1); }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}
@keyframes wiggle {
  0%, 100% { transform: rotate(0); }
  25% { transform: rotate(-2deg); }
  75% { transform: rotate(2deg); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
@keyframes glow {
  0%, 100% { box-shadow: 0 0 8px var(--primary-glow); }
  50% { box-shadow: 0 0 20px var(--primary-glow), 0 0 40px rgba(124,92,252,0.1); }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes xpFloat {
  0% { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(-80px) scale(1.5); }
}
@keyframes shine {
  0% { left: -100%; }
  100% { left: 200%; }
}
@keyframes rainbowBorder {
  0% { border-color: #ef5350; }
  17% { border-color: #ff9800; }
  33% { border-color: #fdd835; }
  50% { border-color: #66bb6a; }
  67% { border-color: #42a5f5; }
  83% { border-color: #ab47bc; }
  100% { border-color: #ef5350; }
}

.pop-in { animation: popIn 0.5s ease both; animation-delay: var(--delay, 0s); }
.bounce-in { animation: bounceIn 0.6s ease both; }
.pulse { animation: pulse 2s ease-in-out infinite; }
.wiggle-text:hover { animation: wiggle 0.4s ease; }
.float { animation: float 3s ease-in-out infinite; }
.sparkle { display: inline-block; animation: pulse 1.5s ease-in-out infinite; }

/* ==================== SIDEBAR ==================== */
#sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  transition: background 0.5s, border-color 0.5s;
}

.logo {
  padding: 20px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border);
}

.logo-icon { font-size: 2.2rem; }

.logo h1 {
  font-size: 0.95rem;
  line-height: 1.3;
  font-weight: 700;
  background: var(--level-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  flex: 1;
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.25s;
  text-align: left;
}

.nav-btn:hover {
  background: rgba(124, 92, 252, 0.1);
  color: var(--text);
  transform: translateX(4px);
}

.nav-btn.active {
  background: var(--primary);
  color: white;
  font-weight: 600;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.nav-icon { font-size: 1.2rem; }

.sidebar-footer {
  padding: 12px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.theme-toggle-btn,
.sound-toggle-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-main);
  font-size: 0.82rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  width: 100%;
}

.theme-toggle-btn:hover,
.sound-toggle-btn:hover {
  border-color: var(--primary);
  color: var(--text);
}

.player-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 8px;
}

.avatar {
  font-size: 1.8rem;
  width: 42px; height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border-radius: 50%;
  border: 2px solid var(--primary);
  transition: transform 0.2s;
}

.avatar:hover { transform: scale(1.1) rotate(5deg); }

.player-name { font-weight: 600; font-size: 0.85rem; }
.player-level { font-size: 0.72rem; color: var(--text-dim); }

/* ==================== THEME PICKER ==================== */
.theme-picker {
  position: fixed;
  bottom: 80px;
  left: 10px;
  width: 200px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  z-index: 150;
  animation: popIn 0.3s ease;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.theme-picker.hidden { display: none; }

.theme-picker h3 { font-size: 0.95rem; margin-bottom: 12px; }

.theme-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.theme-option {
  padding: 10px 6px;
  border-radius: 10px;
  border: 2px solid var(--border);
  cursor: pointer;
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-main);
  transition: all 0.2s;
  background: transparent;
  color: var(--text);
}

.theme-option:hover { transform: scale(1.05); }

.theme-option.active {
  border-color: var(--primary);
  box-shadow: 0 0 12px var(--primary-glow);
}

.theme-option-icon { font-size: 1.4rem; display: block; margin-bottom: 4px; }

.theme-picker-inline {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.theme-picker-inline .theme-option { padding: 8px 10px; font-size: 0.7rem; }

/* ==================== MAIN CONTENT ==================== */
#content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 28px 32px;
  max-width: 1100px;
  transition: margin-left 0.3s;
}

.page { display: none; }
.page.active { display: block; animation: fadeIn 0.4s ease; }

.page-header { margin-bottom: 24px; }
.page-header h2 { font-size: 1.7rem; font-weight: 700; margin-bottom: 4px; }
.subtitle { color: var(--text-dim); font-size: 0.95rem; }

/* ==================== STATS GRID ==================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--bg-card);
  background-image: var(--card-gradient);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  border: 2px solid var(--border);
  transition: all 0.3s;
  cursor: default;
}

.stat-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  border-color: var(--primary);
}

.xp-card { border-left: 5px solid var(--primary); }
.streak-card { border-left: 5px solid var(--accent-orange); }
.lessons-card { border-left: 5px solid var(--secondary); }
.projects-card { border-left: 5px solid var(--accent-pink); }

.stat-icon { font-size: 2rem; }
.stat-value { font-size: 1.8rem; font-weight: 700; }
.stat-label { font-size: 0.75rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600; }

/* ==================== CARDS ==================== */
.card {
  background: var(--bg-card);
  background-image: var(--card-gradient);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 16px;
  border: 1px solid var(--border);
  transition: all 0.3s;
}

.card:hover { border-color: color-mix(in srgb, var(--primary) 50%, transparent); }
.card h3 { margin-bottom: 14px; font-size: 1.05rem; font-weight: 600; }

.glow-card { animation: glow 3s ease-in-out infinite; }

/* ==================== LEVEL PROGRESS ==================== */
.level-bar-container { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }

.level-bar {
  flex: 1;
  height: 20px;
  background: rgba(124, 92, 252, 0.12);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
}

.level-fill {
  height: 100%;
  background: var(--level-gradient);
  border-radius: 10px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.level-fill-shine {
  position: absolute;
  top: 0; left: -100%;
  width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shine 2s ease-in-out infinite;
}

.level-label-left, .level-label-right { font-size: 0.78rem; color: var(--text-dim); white-space: nowrap; font-weight: 600; }
.level-hint { font-size: 0.82rem; color: var(--text-dim); text-align: center; }

/* ==================== WEEK GRID ==================== */
.week-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 8px; }

.week-day {
  text-align: center;
  padding: 14px 6px;
  border-radius: var(--radius-sm);
  background: rgba(124, 92, 252, 0.06);
  border: 2px solid transparent;
  transition: all 0.3s;
}

.week-day.today { border-color: var(--primary); background: rgba(124, 92, 252, 0.12); box-shadow: 0 0 8px var(--primary-glow); }
.week-day.completed { background: rgba(45, 212, 191, 0.12); border-color: var(--secondary); }
.week-day-label { font-size: 0.68rem; color: var(--text-dim); text-transform: uppercase; margin-bottom: 6px; font-weight: 600; }
.week-day-status { font-size: 1.5rem; }

/* ==================== DAILY QUEST ==================== */
.daily-quest-card {
  border: 2px solid var(--accent-yellow);
  background-image: linear-gradient(135deg, rgba(251, 191, 36, 0.06), var(--bg-card));
}

.quest-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.quest-item:last-child { border-bottom: none; }

.quest-check {
  width: 28px; height: 28px;
  border: 3px solid var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: all 0.3s;
  flex-shrink: 0;
  font-size: 0.8rem;
}

.quest-check.done {
  background: var(--success);
  border-color: var(--success);
  animation: popIn 0.4s ease;
}

.quest-text { flex: 1; font-size: 0.92rem; font-weight: 500; }
.quest-xp { font-size: 0.8rem; color: var(--accent-yellow); font-weight: 700; }

/* ==================== WEEK TABS ==================== */
.week-tabs { display: flex; gap: 8px; margin-bottom: 18px; overflow-x: auto; padding-bottom: 4px; }

.week-tab {
  padding: 10px 18px;
  border: 2px solid var(--border);
  background: var(--bg-card);
  color: var(--text-dim);
  border-radius: 24px;
  cursor: pointer;
  white-space: nowrap;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-main);
  transition: all 0.25s;
}

.week-tab:hover { border-color: var(--primary); color: var(--text); transform: translateY(-2px); }
.week-tab.active { background: var(--primary); color: white; border-color: var(--primary); box-shadow: 0 4px 12px var(--primary-glow); }
.week-tab.locked { opacity: 0.45; cursor: not-allowed; }

/* ==================== LESSON CARDS ==================== */
.lesson-card {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  transition: all 0.3s;
}

.lesson-card:hover { border-color: var(--primary); background: var(--bg-card-hover); transform: translateX(6px); box-shadow: 0 4px 16px rgba(0,0,0,0.2); }
.lesson-card.completed { border-left: 5px solid var(--success); }
.lesson-card.locked { opacity: 0.4; cursor: not-allowed; }
.lesson-card.locked:hover { transform: none; border-color: var(--border); background: var(--bg-card); box-shadow: none; }

.lesson-number {
  width: 46px; height: 46px;
  border-radius: 50%;
  background: rgba(124, 92, 252, 0.15);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.1rem;
  color: var(--primary-light);
  flex-shrink: 0;
  border: 2px solid var(--primary);
  transition: all 0.3s;
}

.lesson-card.completed .lesson-number { background: rgba(52, 211, 153, 0.15); color: var(--success); border-color: var(--success); }

.lesson-info { flex: 1; }
.lesson-title { font-weight: 600; margin-bottom: 3px; }
.lesson-desc { font-size: 0.82rem; color: var(--text-dim); }

.lesson-meta { display: flex; gap: 8px; margin-top: 6px; flex-wrap: wrap; }

.lesson-tag {
  font-size: 0.72rem; font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(124, 92, 252, 0.12);
  color: var(--primary-light);
}

.lesson-xp-badge { font-size: 0.75rem; color: var(--accent-yellow); font-weight: 700; }
.lesson-status { font-size: 1.5rem; }

/* ==================== LESSON TABS & QUIZ ==================== */
.lesson-tabs { display: flex; gap: 6px; margin-bottom: 20px; flex-wrap: wrap; }
.lesson-tab {
  padding: 8px 16px; border-radius: 20px; border: 2px solid var(--border);
  background: var(--bg-card); color: var(--text); font-family: var(--font-main);
  font-weight: 600; font-size: 0.85rem; cursor: pointer; transition: all 0.3s;
}
.lesson-tab:hover { border-color: var(--primary); transform: translateY(-1px); }
.lesson-tab.active { background: var(--primary); color: white; border-color: var(--primary); }

/* Challenge & Assignment cards */
.main-challenge { border: 2px solid var(--primary); border-radius: 14px; padding: 20px; margin-bottom: 20px; background: rgba(99,102,241,0.05); }
.assignment-card {
  background: var(--bg-card); border: 2px solid var(--border); border-radius: 14px;
  padding: 18px; margin-bottom: 14px; transition: all 0.3s;
}
.assignment-card.done { border-color: var(--success); opacity: 0.7; }
.assignment-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.assignment-num { font-weight: 700; font-size: 0.95rem; }
.assignment-diff {
  padding: 3px 10px; border-radius: 10px; font-size: 0.75rem; font-weight: 700; text-transform: uppercase;
}
.assignment-diff.easy { background: rgba(16,185,129,0.15); color: var(--success); }
.assignment-diff.medium { background: rgba(245,158,11,0.15); color: var(--accent-yellow); }
.assignment-diff.hard { background: rgba(239,68,68,0.15); color: var(--danger); }
.assignment-prompt { font-size: 0.95rem; margin-bottom: 8px; line-height: 1.5; }
.assignment-hint { font-size: 0.8rem; color: var(--text-dim); margin-bottom: 10px; }

/* Quiz */
.quiz-container { animation: popIn 0.3s ease; }
.quiz-header { margin-bottom: 20px; }
.quiz-question {
  background: var(--bg-card); border: 2px solid var(--border); border-radius: 14px;
  padding: 18px; margin-bottom: 14px; transition: all 0.3s;
}
.quiz-question.quiz-unanswered { border-color: var(--danger); animation: wiggle 0.4s ease; }
.quiz-q-num { font-size: 0.75rem; font-weight: 700; color: var(--primary); text-transform: uppercase; margin-bottom: 6px; }
.quiz-q-text { font-size: 1rem; font-weight: 600; margin-bottom: 12px; line-height: 1.5; }
.quiz-options { display: flex; flex-direction: column; gap: 8px; }
.quiz-option {
  display: flex; align-items: center; gap: 10px; padding: 10px 14px;
  border: 2px solid var(--border); border-radius: 10px; cursor: pointer;
  transition: all 0.2s; background: var(--bg);
}
.quiz-option:hover { border-color: var(--primary); background: rgba(99,102,241,0.05); }
.quiz-option input[type="radio"] { accent-color: var(--primary); width: 18px; height: 18px; }
.quiz-option-text { font-size: 0.9rem; }
.quiz-option.quiz-correct { border-color: var(--success); background: rgba(16,185,129,0.12); }
.quiz-option.quiz-wrong { border-color: var(--danger); background: rgba(239,68,68,0.12); }

.quiz-result-msg {
  padding: 16px; border-radius: 12px; text-align: center; margin-top: 16px;
  font-weight: 700; font-size: 1.1rem; animation: popIn 0.4s ease;
}
.quiz-result-msg.success { background: rgba(16,185,129,0.15); color: var(--success); border: 2px solid var(--success); }
.quiz-result-msg.fail { background: rgba(239,68,68,0.15); color: var(--danger); border: 2px solid var(--danger); }
.quiz-result-msg.warn { background: rgba(245,158,11,0.15); color: var(--accent-yellow); border: 2px solid var(--accent-yellow); font-size: 0.95rem; }

.quiz-passed-banner {
  text-align: center; padding: 20px; font-size: 1.3rem; font-weight: 700;
  background: rgba(16,185,129,0.1); border-radius: 14px; margin-bottom: 20px;
  color: var(--success); border: 2px solid var(--success);
}
.quiz-gate-msg {
  text-align: center; padding: 24px; color: var(--text-dim); font-size: 1rem;
  background: var(--bg-card); border-radius: 14px; margin-top: 20px;
  border: 2px dashed var(--border);
}
.quiz-gate-msg span { font-size: 1.5rem; display: block; margin-bottom: 8px; }

.quiz-review { background: var(--bg-card); border-radius: 14px; padding: 18px; margin-top: 16px; }
.quiz-review-q { padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 0.9rem; line-height: 1.5; }
.quiz-review-q:last-child { border-bottom: none; }

/* Resources */
.resource-card {
  display: flex; align-items: center; gap: 14px; padding: 14px 18px;
  background: var(--bg-card); border: 2px solid var(--border); border-radius: 12px;
  margin-bottom: 10px; text-decoration: none; color: var(--text); transition: all 0.3s;
}
.resource-card:hover { border-color: var(--primary); transform: translateX(4px); }
.resource-icon { font-size: 1.8rem; }
.resource-info { flex: 1; }
.resource-title { font-weight: 700; font-size: 0.95rem; }
.resource-desc { font-size: 0.8rem; color: var(--text-dim); margin-top: 2px; }
.resource-url { font-size: 0.7rem; color: var(--primary); margin-top: 4px; font-family: var(--font-code); }
.resource-arrow { font-size: 1.2rem; color: var(--primary); }

/* Hint button */
.btn-hint {
  background: transparent; color: var(--accent-yellow); border: 1px dashed var(--accent-yellow);
  padding: 6px 14px; border-radius: 8px; cursor: pointer; font-size: 0.82rem;
  font-weight: 600; margin: 8px 0; transition: all 0.2s;
}
.btn-hint:hover { background: rgba(251,191,36,0.1); }

.assignment-diff {
  font-size: 0.7rem; font-weight: 700; padding: 2px 8px; border-radius: 6px; text-transform: uppercase;
}
.assignment-diff.easy { background: rgba(16,185,129,0.2); color: var(--success); }
.assignment-diff.medium { background: rgba(245,158,11,0.2); color: var(--accent-yellow); }
.assignment-diff.hard { background: rgba(239,68,68,0.2); color: var(--danger); }

/* ==================== OVERLAY ==================== */
.overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}

.overlay.hidden { display: none; }

.overlay-content {
  background: var(--bg-dark);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  max-width: 900px; width: 100%;
  max-height: 90vh; overflow-y: auto;
  padding: 32px;
  position: relative;
  animation: popIn 0.3s ease;
}

.close-btn {
  position: absolute; top: 10px; right: 14px;
  background: none; border: none;
  color: var(--text-dim); font-size: 2rem;
  cursor: pointer; line-height: 1;
  transition: all 0.2s;
}
.close-btn:hover { color: var(--danger); transform: scale(1.2); }

/* ==================== LESSON CONTENT ==================== */
.lesson-content h3 { color: var(--primary-light); margin: 18px 0 10px; }
.lesson-content p { line-height: 1.7; margin-bottom: 12px; }

.code-block {
  background: var(--bg-code);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-code);
  padding: 16px;
  margin: 12px 0;
  font-family: 'Fira Code', monospace;
  font-size: 0.88rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre-wrap;
}

.code-keyword { color: #c084fc; }
.code-string { color: #34d399; }
.code-comment { color: #6b7280; }
.code-func { color: #60a5fa; }
.code-number { color: #fb923c; }

.code-demo-wrap { position: relative; }
.code-demo-wrap .code-block { margin-bottom: 0; border-bottom-left-radius: 0; border-bottom-right-radius: 0; }
.btn-demo {
  display: flex; align-items: center; gap: 6px; justify-content: center;
  width: 100%; padding: 8px; border: 2px solid var(--border); border-top: none;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: rgba(124, 92, 252, 0.08); color: var(--primary);
  font-weight: 700; font-size: 0.82rem; cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.btn-demo:hover { background: var(--primary); color: white; }
.btn-demo.playing { pointer-events: none; opacity: 0.6; }
.code-demo-typing { position: relative; }
.code-demo-cursor {
  display: inline-block; width: 2px; height: 1.1em; background: var(--primary);
  vertical-align: text-bottom; animation: blink-cursor 0.7s step-end infinite; margin-left: 1px;
}
@keyframes blink-cursor { 50% { opacity: 0; } }
.code-demo-output {
  background: #1a1a2e; border: 2px solid var(--border); border-top: 1px dashed var(--border);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  padding: 10px 16px; margin-bottom: 12px;
  font-family: 'Fira Code', monospace; font-size: 0.85rem; color: #34d399;
  white-space: pre-wrap; line-height: 1.5;
  opacity: 0; transform: translateY(-4px); transition: opacity 0.4s, transform 0.4s;
}
.code-demo-output.visible { opacity: 1; transform: translateY(0); }
.code-demo-output .output-label {
  color: #6b7280; font-size: 0.75rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1px; display: block; margin-bottom: 4px;
}

/* ==================== CHALLENGE ==================== */
.challenge-area {
  background: rgba(124, 92, 252, 0.06);
  border: 2px solid var(--primary);
  border-radius: var(--radius);
  padding: 22px;
  margin: 20px 0;
}

.challenge-area h4 { color: var(--accent-yellow); margin-bottom: 12px; font-size: 1.05rem; }
.challenge-prompt { margin-bottom: 14px; line-height: 1.6; }

.code-input {
  width: 100%; min-height: 120px;
  background: var(--bg-code);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-code);
  font-family: 'Fira Code', monospace;
  font-size: 0.88rem;
  padding: 14px;
  resize: vertical;
  transition: border-color 0.3s;
}
.code-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 8px var(--primary-glow); }

.challenge-actions { display: flex; gap: 10px; margin-top: 12px; }

.output-area {
  background: var(--bg-code);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-code);
  padding: 14px;
  margin-top: 12px;
  font-family: 'Fira Code', monospace;
  font-size: 0.82rem;
  min-height: 40px;
  white-space: pre-wrap;
}

.output-success { color: var(--success); }
.output-error { color: var(--danger); }

/* ==================== AI TUTOR ==================== */
.btn-tutor {
  margin-top: 12px;
  padding: 9px 18px;
  border-radius: 24px;
  border: 2px solid var(--primary);
  background: transparent;
  color: var(--primary);
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-tutor:hover { background: var(--primary); color: #fff; }

.tutor-panel {
  margin-top: 12px;
  border: 2px solid var(--primary);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 420px;
}
.tutor-panel.hidden { display: none; }

.tutor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
}
.tutor-header-sub { font-weight: 500; font-size: 0.72rem; opacity: 0.85; }
.tutor-close {
  background: none; border: none; color: #fff; font-size: 1.3rem; line-height: 1;
  cursor: pointer; padding: 0 2px; opacity: 0.85;
}
.tutor-close:hover { opacity: 1; }

.tutor-messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 100px;
}

.tutor-empty {
  color: var(--text-dim);
  font-size: 0.85rem;
  text-align: center;
  padding: 10px;
}

.tutor-loading { display: flex; justify-content: center; padding: 16px; gap: 4px; }

.tutor-msg { display: flex; gap: 8px; align-items: flex-start; }
.tutor-msg-student { flex-direction: row-reverse; }
.tutor-avatar { font-size: 1.1rem; flex-shrink: 0; }
.tutor-bubble {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 8px 12px;
  font-size: 0.85rem;
  line-height: 1.4;
  max-width: 82%;
  white-space: pre-wrap;
  word-break: break-word;
}
.tutor-msg-student .tutor-bubble { background: var(--primary); color: #fff; border-color: var(--primary); }
.tutor-msg-tutor .tutor-bubble { background: var(--bg-code); color: var(--text); }

.tutor-typing { display: flex; gap: 3px; padding: 10px 12px; }
.tutor-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--text-dim);
  animation: tutorBounce 1.2s infinite ease-in-out;
}
.tutor-dot:nth-child(2) { animation-delay: 0.15s; }
.tutor-dot:nth-child(3) { animation-delay: 0.3s; }
@keyframes tutorBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30% { transform: translateY(-4px); opacity: 1; }
}

.tutor-error {
  margin: 0 14px 10px;
  padding: 8px 12px;
  background: rgba(248,113,113,0.12);
  border: 1px solid var(--danger);
  border-radius: 10px;
  color: var(--danger);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.tutor-retry-btn {
  background: var(--danger);
  color: #fff;
  border: none;
  border-radius: 14px;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  flex-shrink: 0;
}

.tutor-input-row {
  display: flex;
  gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid var(--border);
}
.tutor-input {
  flex: 1;
  padding: 9px 12px;
  border-radius: 20px;
  border: 2px solid var(--border);
  background: var(--bg-dark);
  color: var(--text);
  font-family: var(--font-main);
  font-size: 0.85rem;
}
.tutor-input:focus { outline: none; border-color: var(--primary); }

.tutor-footer {
  padding: 0 14px 10px;
  font-size: 0.72rem;
  color: var(--text-dim);
  text-align: right;
}

/* ==================== BUTTONS ==================== */
.btn {
  padding: 10px 22px;
  border: none;
  border-radius: 24px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-main);
  cursor: pointer;
  transition: all 0.25s;
  position: relative;
  overflow: hidden;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { filter: brightness(1.15); transform: translateY(-2px); box-shadow: 0 4px 16px var(--primary-glow); }

.btn-secondary {
  background: rgba(124, 92, 252, 0.12);
  color: var(--primary-light);
  border: 2px solid var(--primary);
}
.btn-secondary:hover { background: rgba(124, 92, 252, 0.2); transform: translateY(-2px); }

.btn-success { background: var(--success); color: #0f0e17; }
.btn-success:hover { filter: brightness(1.1); transform: translateY(-2px); }

.btn-lg { padding: 14px 36px; font-size: 1.1rem; }

.btn-glow { animation: glow 2s ease-in-out infinite; }

/* ==================== PLAYGROUND ==================== */
.playground-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  min-height: 450px;
}

.playground-editor { display: flex; flex-direction: column; }
.playground-editor-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }

.playground-textarea {
  flex: 1; width: 100%; min-height: 380px;
  background: var(--bg-code);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-code);
  font-family: 'Fira Code', monospace;
  font-size: 0.88rem;
  padding: 16px;
  resize: none;
  line-height: 1.6;
  tab-size: 4;
  transition: border-color 0.3s;
}
.playground-textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 8px var(--primary-glow); }

.playground-output { display: flex; flex-direction: column; }

.playground-output-area {
  flex: 1;
  background: var(--bg-code);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-code);
  padding: 16px;
  font-family: 'Fira Code', monospace;
  font-size: 0.82rem;
  white-space: pre-wrap;
  overflow-y: auto;
  min-height: 380px;
}

.playground-examples { margin-top: 14px; }

.example-btn {
  padding: 8px 16px; margin: 4px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  color: var(--text-dim);
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: var(--font-main);
  transition: all 0.2s;
}
.example-btn:hover { border-color: var(--primary); color: var(--text); transform: translateY(-2px); }

/* ==================== PROJECTS ==================== */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }

.project-card {
  background: var(--bg-card);
  background-image: var(--card-gradient);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: all 0.3s;
}

.project-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.3); }
.project-card.locked { opacity: 0.4; }

.project-icon { font-size: 2.8rem; margin-bottom: 10px; }
.project-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.project-desc { font-size: 0.82rem; color: var(--text-dim); margin-bottom: 10px; line-height: 1.5; }

.project-difficulty { display: inline-block; font-size: 0.72rem; font-weight: 700; padding: 4px 12px; border-radius: 20px; margin-bottom: 10px; }
.difficulty-beginner { background: rgba(52, 211, 153, 0.15); color: var(--success); }
.difficulty-intermediate { background: rgba(251, 191, 36, 0.15); color: var(--accent-yellow); }
.difficulty-advanced { background: rgba(248, 113, 113, 0.15); color: var(--danger); }

.project-requirements { font-size: 0.78rem; color: var(--text-dim); margin-top: 6px; }

/* ==================== LEADERBOARD ==================== */
.leaderboard-container { max-width: 700px; }

.leaderboard-podium {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 28px;
  padding: 20px 0;
}

.podium-place {
  text-align: center;
  border-radius: var(--radius);
  padding: 16px 20px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  transition: all 0.3s;
  min-width: 130px;
}

.podium-place.gold { border-color: #fbbf24; background: linear-gradient(180deg, rgba(251,191,36,0.1), var(--bg-card)); order: 2; }
.podium-place.silver { border-color: #94a3b8; order: 1; }
.podium-place.bronze { border-color: #cd7f32; order: 3; }

.podium-rank { font-size: 2rem; margin-bottom: 6px; }
.podium-avatar { font-size: 2.2rem; margin-bottom: 4px; }
.podium-name { font-weight: 700; font-size: 0.9rem; margin-bottom: 2px; }
.podium-xp { font-size: 0.78rem; color: var(--accent-yellow); font-weight: 600; }
.podium-place.is-you { animation: rainbowBorder 3s linear infinite; }

.leaderboard-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  transition: all 0.2s;
}

.leaderboard-row:hover { border-color: var(--primary); }
.leaderboard-row.is-you { border-color: var(--primary); background: rgba(124,92,252,0.08); animation: glow 3s ease-in-out infinite; }

.lb-rank { font-size: 1rem; font-weight: 700; width: 30px; text-align: center; }
.lb-avatar { font-size: 1.5rem; }
.lb-name { flex: 1; font-weight: 600; }
.lb-xp { color: var(--accent-yellow); font-weight: 700; font-size: 0.9rem; }
.lb-level { font-size: 0.75rem; color: var(--text-dim); font-weight: 600; }

/* ==================== ACHIEVEMENTS ==================== */
.achievements-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 14px; }

.achievement-card {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: all 0.3s;
}

.achievement-card.unlocked {
  border-color: var(--accent-yellow);
  background: linear-gradient(135deg, rgba(251,191,36,0.06), var(--bg-card));
}

.achievement-card.unlocked:hover { transform: translateY(-4px) scale(1.03); box-shadow: 0 8px 24px rgba(251,191,36,0.2); }
.achievement-card.locked { opacity: 0.35; filter: grayscale(0.6); }

.achievement-icon { font-size: 2.8rem; margin-bottom: 10px; }
.achievement-name { font-weight: 700; margin-bottom: 4px; }
.achievement-desc { font-size: 0.78rem; color: var(--text-dim); }

/* ==================== MODAL ==================== */
.modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.88);
  backdrop-filter: blur(8px);
  z-index: 300;
  display: flex; align-items: center; justify-content: center;
}

.modal.hidden { display: none; }

.modal-content {
  background: var(--bg-dark);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  max-width: 520px; width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  text-align: center;
  animation: popIn 0.4s ease;
}

.onboarding-mascot { font-size: 4rem; margin-bottom: 8px; }
.modal-content h2 { margin-bottom: 8px; font-size: 1.5rem; }
.onboarding-sub { color: var(--text-dim); margin-bottom: 20px; font-size: 1rem; }

.input-label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--text-dim); margin-bottom: 8px; text-align: left; }

.modal-content input[type="text"],
.modal-content input[type="email"] {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: 24px;
  color: var(--text);
  font-size: 1rem;
  font-family: var(--font-main);
  text-align: center;
  margin-bottom: 18px;
  transition: border-color 0.3s;
}
.modal-content input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 8px var(--primary-glow); }
.modal-content input[type="password"] {
  width: 100%;
  padding: 12px 16px;
  border-radius: 12px;
  border: 2px solid var(--border);
  background: var(--bg-dark);
  color: var(--text);
  font-size: 1rem;
  font-family: var(--font-main);
  margin-bottom: 18px;
  transition: border-color 0.3s;
}
.modal-content input[type="password"]:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 8px var(--primary-glow); }

.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 20px;
  border-radius: 12px;
  overflow: hidden;
  border: 2px solid var(--border);
}
.auth-tab {
  flex: 1;
  padding: 10px 16px;
  border: none;
  background: var(--bg-dark);
  color: var(--text-dim);
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
}
.auth-tab.active {
  background: var(--primary);
  color: #fff;
}
.auth-tab:hover:not(.active) {
  background: var(--bg-card-hover);
  color: var(--text);
}
.auth-error {
  color: var(--danger);
  font-size: 0.85rem;
  margin-bottom: 12px;
  text-align: center;
}

.avatar-picker {
  display: flex; gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.avatar-option {
  font-size: 2rem;
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  border: 3px solid var(--border);
  cursor: pointer;
  transition: all 0.25s;
}

.avatar-option:hover,
.avatar-option.selected {
  border-color: var(--primary);
  background: rgba(124, 92, 252, 0.15);
  transform: scale(1.15);
  box-shadow: 0 0 12px var(--primary-glow);
}

/* ==================== TOAST ==================== */
.toast {
  position: fixed;
  bottom: 30px; right: 30px;
  background: var(--bg-card);
  border: 2px solid var(--primary);
  border-radius: var(--radius);
  padding: 16px 24px;
  z-index: 400;
  animation: slideUp 0.4s ease;
  max-width: 360px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.toast.hidden { display: none; }

.toast-title { font-weight: 700; margin-bottom: 4px; font-size: 0.95rem; }
.toast-body { font-size: 0.82rem; color: var(--text-dim); }

/* ==================== XP POPUP ==================== */
.xp-popup {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-yellow);
  text-shadow: 0 0 20px rgba(251,191,36,0.5);
  z-index: 450;
  pointer-events: none;
  animation: xpFloat 1.2s ease forwards;
}

.xp-popup.hidden { display: none; }

/* ==================== RECOMMENDED ==================== */
.recommended-card {
  display: flex; align-items: center; gap: 16px;
  padding: 16px;
  background: rgba(124, 92, 252, 0.06);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.3s;
}

.recommended-card:hover { background: rgba(124, 92, 252, 0.12); border-color: var(--primary); transform: translateX(4px); }

/* ==================== SCROLLBAR ==================== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ==================== RESPONSIVE ==================== */
/* ==================== MULTIPLAYER / BATTLE ARENA ==================== */
.mp-tabs { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.mp-tab {
  padding: 10px 20px; border-radius: 25px; border: 2px solid var(--border);
  background: var(--bg-card); color: var(--text); font-family: var(--font-main);
  font-weight: 600; font-size: 0.95rem; cursor: pointer; transition: all 0.3s;
}
.mp-tab:hover { border-color: var(--primary); transform: translateY(-2px); }
.mp-tab.active { background: var(--primary); color: white; border-color: var(--primary); box-shadow: 0 4px 15px rgba(var(--primary-rgb, 99,102,241), 0.4); }
.mp-section.hidden { display: none; }

.difficulty-select { display: flex; gap: 8px; flex-wrap: wrap; }
.diff-btn {
  padding: 8px 18px; border-radius: 20px; border: 2px solid var(--border);
  background: var(--bg-card); color: var(--text); font-family: var(--font-main);
  font-weight: 600; cursor: pointer; transition: all 0.3s; font-size: 0.9rem;
}
.diff-btn:hover { transform: scale(1.05); }
.diff-btn.active { background: var(--primary); color: white; border-color: var(--primary); }

.battle-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 12px; }
.battle-stat {
  text-align: center; padding: 16px; background: var(--bg); border-radius: 12px;
  border: 1px solid var(--border);
}
.battle-stat .stat-num { font-size: 1.8rem; font-weight: 700; color: var(--primary); }
.battle-stat .stat-lbl { font-size: 0.8rem; color: var(--text-dim); margin-top: 4px; }

.duel-arena {
  background: var(--bg-card); border-radius: 16px; padding: 24px;
  border: 2px solid var(--primary); animation: popIn 0.4s ease;
}
.duel-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.duel-players { display: flex; justify-content: space-around; margin-bottom: 16px; }
.duel-player { text-align: center; }
.duel-player .avatar-big { font-size: 3rem; }
.duel-player .name { font-weight: 700; margin-top: 4px; }
.duel-timer {
  text-align: center; font-size: 2.5rem; font-weight: 700; color: var(--danger);
  font-family: var(--font-code); margin: 12px 0;
}
.duel-challenge-box {
  background: var(--bg); border-radius: 12px; padding: 16px;
  border: 1px solid var(--border); margin-bottom: 16px;
}
.duel-code-area { width: 100%; min-height: 120px; background: var(--bg); color: var(--text);
  border: 2px solid var(--border); border-radius: 12px; padding: 12px;
  font-family: var(--font-code); font-size: 0.95rem; resize: vertical;
}
.duel-code-area:focus { border-color: var(--primary); outline: none; }
.duel-result {
  text-align: center; padding: 20px; border-radius: 12px; margin-top: 16px;
  font-size: 1.2rem; font-weight: 700; animation: popIn 0.4s ease;
}
.duel-result.win { background: rgba(16,185,129,0.15); color: var(--success); border: 2px solid var(--success); }
.duel-result.lose { background: rgba(239,68,68,0.15); color: var(--danger); border: 2px solid var(--danger); }

.recent-duel {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px; border-radius: 10px; background: var(--bg);
  margin-bottom: 8px; border: 1px solid var(--border);
}
.recent-duel .result-badge {
  padding: 4px 12px; border-radius: 12px; font-size: 0.8rem; font-weight: 700;
}
.recent-duel .result-badge.win { background: rgba(16,185,129,0.2); color: var(--success); }
.recent-duel .result-badge.lose { background: rgba(239,68,68,0.2); color: var(--danger); }

/* Co-op */
.coop-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.coop-card {
  background: var(--bg-card); border-radius: 16px; padding: 20px;
  border: 2px solid var(--border); transition: all 0.3s; cursor: pointer;
}
.coop-card:hover { transform: translateY(-4px); border-color: var(--primary); box-shadow: 0 8px 25px var(--shadow); }
.coop-card .coop-icon { font-size: 2.5rem; margin-bottom: 8px; }
.coop-card .coop-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; }
.coop-card .coop-desc { font-size: 0.85rem; color: var(--text-dim); margin-bottom: 12px; }
.coop-card .coop-meta { display: flex; gap: 12px; font-size: 0.8rem; color: var(--text-dim); }
.coop-card .coop-meta span { background: var(--bg); padding: 4px 10px; border-radius: 8px; }
.coop-card .coop-join-btn {
  margin-top: 12px; width: 100%; padding: 10px; border-radius: 12px;
  background: var(--primary); color: white; border: none; font-family: var(--font-main);
  font-weight: 600; cursor: pointer; font-size: 0.95rem; transition: all 0.3s;
}
.coop-card .coop-join-btn:hover { transform: scale(1.02); filter: brightness(1.1); }

/* Tournament */
.tournament-status { display: flex; gap: 16px; margin: 16px 0; flex-wrap: wrap; }
.tournament-stat {
  flex: 1; min-width: 120px; text-align: center; padding: 14px;
  background: var(--bg); border-radius: 12px; border: 1px solid var(--border);
}
.tournament-stat .t-val { font-size: 1.4rem; font-weight: 700; color: var(--primary); }
.tournament-stat .t-lbl { font-size: 0.8rem; color: var(--text-dim); }
.tournament-standing {
  display: flex; align-items: center; gap: 12px; padding: 10px 14px;
  border-radius: 10px; background: var(--bg); margin-bottom: 8px;
  border: 1px solid var(--border);
}
.tournament-standing .rank { font-weight: 700; min-width: 30px; text-align: center; font-size: 1.1rem; }
.tournament-standing .rank.gold { color: #f59e0b; }
.tournament-standing .rank.silver { color: #94a3b8; }
.tournament-standing .rank.bronze { color: #d97706; }
.tournament-standing .t-name { flex: 1; font-weight: 600; }
.tournament-standing .t-score { font-weight: 700; color: var(--primary); }

/* ==================== PARENT DASHBOARD ==================== */
.overlay-content.parent-dashboard {
  background: var(--bg-card); border-radius: 20px; padding: 30px;
  width: 100%; position: relative; max-height: 90vh; overflow-y: auto;
}

.parent-header { text-align: center; margin-bottom: 20px; }
.parent-tabs { display: flex; gap: 8px; margin-bottom: 20px; justify-content: center; flex-wrap: wrap; }
.parent-tab {
  padding: 10px 20px; border-radius: 25px; border: 2px solid var(--border);
  background: var(--bg); color: var(--text); font-family: var(--font-main);
  font-weight: 600; cursor: pointer; transition: all 0.3s; font-size: 0.9rem;
}
.parent-tab:hover { border-color: var(--primary); }
.parent-tab.active { background: var(--primary); color: white; border-color: var(--primary); }
.parent-section.hidden { display: none; }

.parent-stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 20px; }
.parent-stat-card {
  text-align: center; padding: 18px; background: var(--bg); border-radius: 14px;
  border: 1px solid var(--border);
}
.parent-stat-card .ps-icon { font-size: 2rem; margin-bottom: 6px; }
.parent-stat-card .ps-value { font-size: 1.6rem; font-weight: 700; color: var(--primary); }
.parent-stat-card .ps-label { font-size: 0.8rem; color: var(--text-dim); }

.skills-bar { margin-bottom: 12px; }
.skills-bar .skill-name { font-size: 0.85rem; font-weight: 600; margin-bottom: 4px; display: flex; justify-content: space-between; }
.skills-bar .skill-track { height: 10px; background: var(--bg); border-radius: 5px; overflow: hidden; }
.skills-bar .skill-fill { height: 100%; border-radius: 5px; transition: width 0.8s ease; }

.activity-day {
  padding: 12px 16px; border-radius: 10px; background: var(--bg);
  margin-bottom: 8px; border: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
}
.activity-day .day-date { font-weight: 600; }
.activity-day .day-details { font-size: 0.85rem; color: var(--text-dim); }
.activity-day .day-xp { font-weight: 700; color: var(--primary); }

.parent-tutor-thread {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 14px;
}
.parent-tutor-thread-title { font-weight: 700; margin-bottom: 10px; font-size: 0.9rem; }
.parent-tutor-thread-msgs { display: flex; flex-direction: column; gap: 10px; }
.parent-tutor-time { font-size: 0.65rem; color: var(--text-dim); align-self: flex-end; white-space: nowrap; }

.settings-form .setting-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 0; border-bottom: 1px solid var(--border);
}
.settings-form .setting-item:last-child { border-bottom: none; }
.settings-form .setting-label { font-weight: 600; }
.settings-form .setting-desc { font-size: 0.8rem; color: var(--text-dim); }
.settings-form input[type="number"], .settings-form input[type="password"] {
  width: 80px; padding: 8px 12px; border-radius: 10px; border: 2px solid var(--border);
  background: var(--bg); color: var(--text); font-family: var(--font-main);
  text-align: center; font-size: 1rem;
}
.settings-form .toggle-switch {
  width: 50px; height: 28px; border-radius: 14px; background: var(--border);
  cursor: pointer; position: relative; transition: all 0.3s; border: none;
}
.settings-form .toggle-switch.on { background: var(--primary); }
.settings-form .toggle-switch::after {
  content: ''; width: 22px; height: 22px; border-radius: 50%; background: white;
  position: absolute; top: 3px; left: 3px; transition: all 0.3s;
}
.settings-form .toggle-switch.on::after { left: 25px; }

.parent-recommendations .rec-item {
  padding: 12px 16px; background: var(--bg); border-radius: 10px; margin-bottom: 8px;
  border-left: 4px solid var(--primary); font-size: 0.9rem;
}

.weekly-chart { display: flex; align-items: flex-end; gap: 8px; height: 150px; padding: 10px 0; }
.weekly-chart .bar-col { flex: 1; display: flex; flex-direction: column; align-items: center; }
.weekly-chart .bar {
  width: 100%; border-radius: 6px 6px 0 0; background: var(--primary);
  transition: height 0.6s ease; min-height: 4px; opacity: 0.8;
}
.weekly-chart .bar-label { font-size: 0.7rem; color: var(--text-dim); margin-top: 6px; }
.weekly-chart .bar-value { font-size: 0.7rem; font-weight: 600; margin-bottom: 4px; }

/* Run button (green) */
.btn-run {
  background: #10b981; color: white; font-weight: 600;
}
.btn-run:hover { background: #059669; }

/* Locked lesson tab */
.lesson-tab.tab-locked {
  opacity: 0.5; cursor: not-allowed;
}

/* Project page styles */
.project-brief {
  background: var(--bg); border-radius: 12px; padding: 16px; margin-bottom: 16px;
  border-left: 4px solid var(--primary);
}
.project-brief h4 { margin-bottom: 8px; }
.project-requirements-list { margin-top: 12px; font-size: 0.9rem; }
.project-requirements-list ul { margin: 6px 0 0 18px; }
.project-requirements-list li { margin-bottom: 4px; color: var(--text-dim); }

.project-hints-section { margin-bottom: 16px; }
.project-hints-section h4 { margin-bottom: 8px; }
.project-hint {
  padding: 10px 14px; border-radius: 8px; margin-bottom: 6px; font-size: 0.9rem;
}
.project-hint.revealed {
  background: var(--bg); border-left: 3px solid var(--accent-yellow);
}
.project-hint.locked {
  color: var(--text-dim); opacity: 0.5; font-style: italic;
}
.project-hint .hint-num {
  font-weight: 700; color: var(--accent-yellow); margin-right: 6px;
}

.project-editor { margin-top: 16px; }
.project-editor h4 { margin-bottom: 8px; }
.project-code { min-height: 200px; }

/* Tournament round highlight */
.tournament-standing.is-you {
  background: rgba(124, 92, 252, 0.12); border-radius: 8px; font-weight: 700;
}
.tournament-round { border: 2px solid var(--accent-yellow); }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

@media (max-width: 768px) {
  #sidebar { width: 60px; overflow: hidden; }
  .nav-text, .logo h1, .player-name, .player-level, .theme-toggle-btn .nav-text, .sound-toggle-btn .nav-text { display: none; }
  .logo { justify-content: center; padding: 14px 0; }
  .nav-btn { justify-content: center; padding: 12px; }
  #content { margin-left: 60px; padding: 16px; }
  .playground-container { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .theme-picker { left: 62px; }
  .leaderboard-podium { flex-direction: column; align-items: center; }
  .coop-grid { grid-template-columns: 1fr; }
  .parent-stats-grid { grid-template-columns: repeat(2, 1fr); }
  .slide-compare { flex-direction: column; }
  .slide-icons { gap: 12px; }
  .slide-icon-card { min-width: 60px; padding: 10px 8px; }
  .slide-icon-emoji { font-size: 1.5rem; }
  .slide-title { font-size: 1.4rem; }
  .slide-body { font-size: 0.95rem; }
}

/* ==================== ANIMATED LESSON PLAYER ==================== */
.slide-overlay {
  position: fixed; inset: 0; z-index: 10000;
  background: rgba(0,0,0,0.92); backdrop-filter: blur(12px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity 0.3s;
}
.slide-overlay.visible { opacity: 1; }

.slide-player {
  width: 100%; max-width: 800px; height: 90vh; max-height: 600px;
  display: flex; flex-direction: column; position: relative;
  padding: 0 16px;
}
.slide-close {
  position: absolute; top: -8px; right: 16px; z-index: 10;
  background: rgba(255,255,255,0.1); border: none; color: white;
  width: 36px; height: 36px; border-radius: 50%; font-size: 1.1rem;
  cursor: pointer; transition: background 0.2s;
}
.slide-close:hover { background: rgba(255,255,255,0.25); }

.slide-stage {
  flex: 1; border-radius: 20px; overflow: hidden; position: relative;
  display: flex; align-items: center; justify-content: center;
  padding: 32px 28px;
}
.slide-stage.gradient-purple { background: linear-gradient(135deg, #1a1040 0%, #2d1b69 50%, #1a1040 100%); }
.slide-stage.gradient-blue { background: linear-gradient(135deg, #0c1929 0%, #1a3a5c 50%, #0c1929 100%); }
.slide-stage.gradient-dark { background: linear-gradient(135deg, #0d0c1a 0%, #1a1932 50%, #0d0c1a 100%); }
.slide-stage.gradient-green { background: linear-gradient(135deg, #0a1f1a 0%, #1a4a3a 50%, #0a1f1a 100%); }
.slide-stage.gradient-gold { background: linear-gradient(135deg, #1f1a0a 0%, #4a3a1a 50%, #1f1a0a 100%); }

.slide-content {
  width: 100%; max-width: 600px; text-align: center;
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.5s, transform 0.5s;
}
.slide-content.visible { opacity: 1; transform: translateY(0); }

.slide-mascot { font-size: 3rem; margin-bottom: 8px; animation: slide-bounce 2s ease infinite; }
@keyframes slide-bounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

.slide-title {
  font-family: var(--font-main); font-size: 1.7rem; font-weight: 800;
  color: white; margin-bottom: 8px;
}
.slide-body {
  font-size: 1.05rem; color: rgba(255,255,255,0.8); line-height: 1.5;
  margin-bottom: 18px;
}
.slide-body code {
  background: rgba(124,92,252,0.2); padding: 2px 6px; border-radius: 4px;
  font-family: 'Fira Code', monospace; color: #a78bfa;
}
.slide-note {
  font-size: 0.85rem; color: rgba(255,255,255,0.5); font-style: italic; margin-top: 10px;
}

/* Slide visuals */
.slide-icons {
  display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-top: 8px;
}
.slide-icon-card {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px; padding: 14px 16px; min-width: 80px;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  animation: slide-pop 0.4s ease backwards;
}
.slide-icon-card:nth-child(1) { animation-delay: 0.3s; }
.slide-icon-card:nth-child(2) { animation-delay: 0.5s; }
.slide-icon-card:nth-child(3) { animation-delay: 0.7s; }
.slide-icon-card:nth-child(4) { animation-delay: 0.9s; }
@keyframes slide-pop { from { opacity: 0; transform: scale(0.5); } to { opacity: 1; transform: scale(1); } }

.slide-icon-emoji { font-size: 2rem; }
.slide-icon-label { font-size: 0.8rem; color: rgba(255,255,255,0.7); font-weight: 600; }

.slide-concept {
  background: rgba(255,255,255,0.05); border: 2px solid var(--primary);
  border-radius: 16px; padding: 24px; display: inline-flex; flex-direction: column;
  align-items: center; gap: 8px; animation: slide-pop 0.5s ease 0.3s backwards;
}
.slide-concept-icon { font-size: 2.5rem; }
.slide-concept-code {
  font-family: 'Fira Code', monospace; font-size: 1.4rem; font-weight: 700;
  color: #60a5fa; background: rgba(0,0,0,0.3); padding: 6px 20px; border-radius: 8px;
}
.slide-concept-desc { font-size: 0.95rem; color: rgba(255,255,255,0.7); line-height: 1.5; }

.slide-code-area { margin: 0 auto; max-width: 500px; width: 100%; }
.slide-code-block {
  background: #0d0c1a; border: 2px solid rgba(124,92,252,0.3); border-radius: 10px;
  padding: 16px 20px; font-family: 'Fira Code', monospace; font-size: 0.95rem;
  color: #e8e6f0; text-align: left; white-space: pre-wrap; line-height: 1.6;
  min-height: 44px;
}
.slide-code-block.mini { padding: 10px 14px; font-size: 0.85rem; min-height: 0; }
.slide-code-caption {
  font-size: 0.8rem; color: rgba(255,255,255,0.4); margin-top: 8px; text-align: center;
}

/* Breakdown */
.slide-breakdown .breakdown-part {
  opacity: 0; transition: opacity 0.3s; display: inline;
}
.slide-breakdown .breakdown-part.visible { opacity: 1; }

.slide-breakdown-labels {
  display: flex; gap: 12px; justify-content: center; margin-top: 14px; flex-wrap: wrap;
}
.breakdown-label {
  background: rgba(0,0,0,0.3); border-left: 3px solid; border-radius: 8px;
  padding: 8px 12px; text-align: left; font-size: 0.8rem; color: rgba(255,255,255,0.7);
  opacity: 0; transform: translateY(10px); transition: opacity 0.4s, transform 0.4s;
}
.breakdown-label.visible { opacity: 1; transform: translateY(0); }

/* Run animation */
.slide-run-area { max-width: 500px; margin: 0 auto; width: 100%; }
.slide-arrow-down {
  font-size: 1.5rem; color: var(--primary); margin: 8px 0;
  opacity: 0; transition: opacity 0.4s; animation: none;
}
.slide-arrow-down.visible { opacity: 1; animation: arrow-pulse 1s ease 2; }
@keyframes arrow-pulse { 0%,100% { transform: translateY(0); } 50% { transform: translateY(5px); } }

.slide-output-box {
  background: #0a1f1a; border: 2px solid #34d399; border-radius: 10px;
  padding: 14px 20px; font-family: 'Fira Code', monospace; font-size: 0.95rem;
  color: #34d399; text-align: left; white-space: pre-wrap;
  opacity: 0; transform: translateY(10px); transition: opacity 0.5s, transform 0.5s;
}
.slide-output-box.visible { opacity: 1; transform: translateY(0); }

/* Compare */
.slide-compare { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.slide-compare-card {
  flex: 1; min-width: 200px; max-width: 260px; border-radius: 12px; overflow: hidden;
  animation: slide-pop 0.4s ease backwards;
}
.slide-compare-card:nth-child(2) { animation-delay: 0.3s; }
.slide-compare-card.correct { border: 2px solid #34d399; }
.slide-compare-card.wrong { border: 2px solid #f87171; }
.slide-compare-badge {
  padding: 6px; text-align: center; font-size: 0.8rem; font-weight: 700;
}
.slide-compare-card.correct .slide-compare-badge { background: rgba(52,211,153,0.15); color: #34d399; }
.slide-compare-card.wrong .slide-compare-badge { background: rgba(248,113,113,0.15); color: #f87171; }
.slide-compare-card .slide-code-block { border: none; border-radius: 0; }

/* Multi code */
.slide-multi-code { display: flex; flex-direction: column; gap: 10px; max-width: 500px; margin: 0 auto; }
.slide-example {
  display: flex; align-items: stretch; gap: 0; border-radius: 10px; overflow: hidden;
  opacity: 0; transform: translateX(-20px); transition: opacity 0.4s, transform 0.4s;
}
.slide-example.visible { opacity: 1; transform: translateX(0); }
.slide-example .slide-code-block { flex: 1; border-radius: 10px 0 0 10px; border-right: none; }
.slide-example-output {
  background: #0a1f1a; border: 2px solid rgba(52,211,153,0.3); border-left: none;
  border-radius: 0 10px 10px 0; padding: 10px 14px; font-family: 'Fira Code', monospace;
  font-size: 0.85rem; color: #34d399; display: flex; align-items: center;
  min-width: 100px; white-space: pre-wrap;
}

/* Boxes */
.slide-boxes { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; margin-top: 4px; }
.slide-box {
  width: 120px; border-radius: 12px; overflow: hidden; animation: slide-pop 0.4s ease backwards;
  border: 2px solid rgba(255,255,255,0.15);
}
.slide-box:nth-child(1) { animation-delay: 0.3s; }
.slide-box:nth-child(2) { animation-delay: 0.5s; }
.slide-box:nth-child(3) { animation-delay: 0.7s; }
.slide-box-label {
  padding: 6px; text-align: center; font-family: 'Fira Code', monospace;
  font-size: 0.85rem; font-weight: 700; color: #0d0c1a;
}
.slide-box-value {
  padding: 12px 8px; text-align: center; background: rgba(0,0,0,0.3);
  font-family: 'Fira Code', monospace; font-size: 1rem; color: white;
}

/* Summary */
.slide-summary ul {
  list-style: none; text-align: left; max-width: 380px; margin: 0 auto;
}
.slide-summary li {
  padding: 8px 0; color: rgba(255,255,255,0.85); font-size: 0.95rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  animation: slide-pop 0.4s ease backwards;
}
.slide-summary li:nth-child(1) { animation-delay: 0.2s; }
.slide-summary li:nth-child(2) { animation-delay: 0.4s; }
.slide-summary li:nth-child(3) { animation-delay: 0.6s; }
.slide-summary li:nth-child(4) { animation-delay: 0.8s; }
.slide-summary li::before { content: '✅ '; }
.slide-cta {
  margin-top: 16px; font-weight: 700; color: var(--primary-light); font-size: 1rem;
  animation: slide-pop 0.4s ease 1s backwards;
}

/* Controls */
.slide-controls {
  display: flex; align-items: center; gap: 16px; padding: 14px 0 4px;
  justify-content: center;
}
.slide-btn {
  width: 44px; height: 44px; border-radius: 50%; border: 2px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.05); color: white; font-size: 1rem;
  cursor: pointer; transition: all 0.2s;
}
.slide-btn:hover:not(:disabled) { background: var(--primary); border-color: var(--primary); }
.slide-btn:disabled { opacity: 0.3; cursor: default; }

.slide-progress { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.slide-dots { display: flex; gap: 6px; }
.slide-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,0.2); cursor: pointer; transition: all 0.3s;
}
.slide-dot.active { background: var(--primary); transform: scale(1.3); }
.slide-dot.done { background: var(--secondary); }
.slide-counter { font-size: 0.75rem; color: rgba(255,255,255,0.4); }

.slide-auto-btn {
  display: block; margin: 4px auto 0; background: none; border: 1px solid rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.5); padding: 6px 18px; border-radius: 20px;
  font-size: 0.78rem; cursor: pointer; transition: all 0.2s;
}
.slide-auto-btn:hover { border-color: var(--primary); color: var(--primary); }
.slide-auto-btn.active { background: var(--primary); color: white; border-color: var(--primary); }

/* Watch Lesson button in Learn tab */
.btn-watch-lesson {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, #7c5cfc, #a78bfa); color: white;
  border: none; padding: 12px 28px; border-radius: 12px;
  font-family: var(--font-main); font-weight: 700; font-size: 1rem;
  cursor: pointer; transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 15px rgba(124,92,252,0.3);
}
.btn-watch-lesson:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(124,92,252,0.5); }
.btn-watch-lesson .play-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; background: rgba(255,255,255,0.2); border-radius: 50%;
}

/* ==================== ADMIN DASHBOARD ==================== */
.admin-panel {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg-dark); overflow-y: auto; padding: 24px;
}
.admin-login-card {
  max-width: 380px; margin: 80px auto; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 32px;
  text-align: center;
}
.admin-login-card h1 { font-family: var(--font-main); font-size: 1.5rem; color: white; margin-bottom: 8px; }
.admin-input {
  width: 100%; padding: 12px 16px; border-radius: var(--radius-sm);
  border: 2px solid var(--border); background: var(--bg-dark); color: white;
  font-size: 1rem; text-align: center; margin-top: 8px;
}
.admin-input:focus { border-color: var(--primary); outline: none; }
.admin-loading { text-align: center; padding: 60px; color: var(--text-dim); font-size: 1.1rem; }

.admin-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 24px; flex-wrap: wrap; gap: 12px;
}
.admin-header h1 { font-family: var(--font-main); font-size: 1.6rem; color: white; }
.admin-header-actions { display: flex; gap: 8px; }

.admin-btn {
  padding: 8px 16px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-card); color: var(--text); cursor: pointer;
  font-size: 0.85rem; text-decoration: none; transition: all 0.2s;
}
.admin-btn:hover { border-color: var(--primary); color: var(--primary); }

.admin-stats-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px; margin-bottom: 24px;
}
.admin-stat-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 20px 16px; text-align: center;
}
.admin-stat-number {
  font-size: 2rem; font-weight: 800; color: var(--primary-light);
  font-family: var(--font-main);
}
.admin-stat-label { font-size: 0.8rem; color: var(--text-dim); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.5px; }

.admin-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; margin-bottom: 20px;
}
.admin-card h2 { font-family: var(--font-main); font-size: 1.1rem; color: white; margin-bottom: 16px; }

.admin-table-wrap { overflow-x: auto; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.admin-table th {
  text-align: left; padding: 10px 12px; color: var(--text-dim);
  border-bottom: 2px solid var(--border); font-weight: 600;
  text-transform: uppercase; font-size: 0.7rem; letter-spacing: 0.5px;
  white-space: nowrap;
}
.admin-table td {
  padding: 10px 12px; border-bottom: 1px solid var(--border);
  color: var(--text); vertical-align: middle;
}
.admin-table tr:hover td { background: rgba(124,92,252,0.05); }

.admin-actions { white-space: nowrap; }
.admin-btn-sm {
  padding: 4px 8px; border-radius: 6px; border: 1px solid var(--border);
  background: transparent; cursor: pointer; font-size: 0.85rem;
  transition: all 0.2s;
}
.admin-btn-sm:hover { border-color: var(--primary); background: rgba(124,92,252,0.1); }
.admin-btn-sm.danger:hover { border-color: var(--danger); background: rgba(248,113,113,0.1); }

.signup-chart {
  display: flex; align-items: flex-end; gap: 6px; height: 120px; padding: 0 4px;
}
.chart-bar-wrap {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  height: 100%; justify-content: flex-end; min-width: 30px;
}
.chart-bar {
  width: 100%; max-width: 40px; background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 4px 4px 0 0; transition: height 0.5s;
}
.chart-count { font-size: 0.7rem; color: var(--primary-light); font-weight: 700; margin-bottom: 4px; }
.chart-label { font-size: 0.65rem; color: var(--text-dim); margin-top: 4px; }