:root {
  --bg-deep: #0f172a;
  --bg-gradient: radial-gradient(circle at 50% 0%, #1e293b 0%, #0f172a 100%);
  --primary: #8b5cf6;
  --primary-glow: #a78bfa;
  --accent: #06b6d4;
  --accent-glow: #67e8f9;
  --success: #10b981;
  --error: #f43f5e;
  --text-light: #f8fafc;
  --text-dim: #94a3b8;
  --glass: rgba(255, 255, 255, 0.08);
  --glass-high: rgba(255, 255, 255, 0.15);
  --glass-border: rgba(255, 255, 255, 0.12);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Fredoka', sans-serif;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--text-light);
  background-color: var(--bg-deep);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem;
  overflow-x: hidden;
}

/* Background Animation */
.cosmos-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.star-field {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(1px 1px at 10% 10%, #fff, transparent),
    radial-gradient(1px 1px at 20% 20%, #fff, transparent),
    radial-gradient(2px 2px at 30% 30%, #fff, transparent),
    radial-gradient(1px 1px at 40% 40%, #fff, transparent),
    radial-gradient(1px 1px at 50% 50%, #fff, transparent),
    radial-gradient(2px 2px at 60% 60%, #fff, transparent),
    radial-gradient(1px 1px at 70% 70%, #fff, transparent),
    radial-gradient(1px 1px at 80% 80%, #fff, transparent),
    radial-gradient(2px 2px at 90% 90%, #fff, transparent);
  background-size: 550px 550px;
  opacity: 0.6;
  animation: starMove 100s linear infinite;
}

.planet {
  position: absolute;
  border-radius: 50%;
  opacity: 0.8;
}

.planet-1 {
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, #ff7e5f, #feb47b);
  top: 10%;
  right: -40px;
  box-shadow: 0 0 40px rgba(255, 126, 95, 0.4);
  animation: float 20s ease-in-out infinite;
}

.planet-2 {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #4facfe, #00f2fe);
  bottom: 15%;
  left: -20px;
  box-shadow: 0 0 30px rgba(79, 172, 254, 0.4);
  animation: float 25s ease-in-out infinite reverse;
}

.nebula {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.15), transparent 60%),
    radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.1), transparent 50%);
  filter: blur(40px);
}

@keyframes starMove {
  from {
    background-position: 0 0;
  }

  to {
    background-position: 550px 550px;
  }
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  50% {
    transform: translateY(-20px) rotate(5deg);
  }
}

/* Layout & Glass Panel */
.app-container {
  width: min(600px, 100%);
  position: relative;
  z-index: 1;
}

.glass-panel {
  background: var(--glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  padding: 2rem;
  color: var(--text-light);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.hidden {
  display: none !important;
  opacity: 0;
  pointer-events: none;
}

/* Landing Page Styles */
.hero-section {
  text-align: center;
  margin-bottom: 2.5rem;
}

.badge-pill {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: rgba(139, 92, 246, 0.2);
  border: 1px solid rgba(139, 92, 246, 0.4);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-glow);
  margin-bottom: 1rem;
  letter-spacing: 0.5px;
}

.main-title {
  font-family: var(--font-heading);
  font-size: 3rem;
  line-height: 1.1;
  margin: 0 0 1rem;
  font-weight: 800;
  text-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.highlight {
  background: linear-gradient(135deg, var(--accent), #fff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 1.1rem;
  color: var(--text-dim);
  margin: 0;
  line-height: 1.5;
}

/* Section Labels */
.section-label {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin: 0 0 1rem;
  font-weight: 700;
}

/* Difficulty Selector */
.difficulty-selector {
  margin-bottom: 2rem;
}

.difficulty-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.diff-card {
  position: relative;
  cursor: pointer;
}

.diff-card input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.diff-content {
  background: var(--glass);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  padding: 1rem 0.5rem;
  text-align: center;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.diff-card .icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  display: block;
  transition: transform 0.2s ease;
}

.diff-card .name {
  display: block;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 0.2rem;
}

.diff-card .desc {
  display: block;
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* Active State */
.diff-card input:checked+.diff-content {
  background: rgba(139, 92, 246, 0.15);
  border-color: var(--primary);
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
  transform: translateY(-4px);
}

.diff-card input:checked+.diff-content .icon {
  transform: scale(1.2);
}

/* Primary Button */
.btn-primary {
  width: 100%;
  padding: 1.2rem;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  overflow: hidden;
}

.btn-primary:active {
  transform: scale(0.98);
}

.shimmer-btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transform: skewX(-20deg);
  animation: shimmer 3s infinite;
}

@keyframes shimmer {
  0% {
    left: -100%;
  }

  20% {
    left: 200%;
  }

  100% {
    left: 200%;
  }
}

/* Leaderboard Mini */
.leaderboard-mini {
  margin-top: 2rem;
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.lb-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  color: var(--accent-glow);
  margin-bottom: 0.8rem;
  font-size: 0.95rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 0.5rem;
}

.lb-list {
  padding: 0;
  margin: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.leaderboard-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem;
  background: var(--glass);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.leaderboard-item span:first-child {
  font-weight: 600;
  color: white;
}

.leaderboard-time {
  color: var(--accent);
  font-family: var(--font-heading);
  font-weight: 700;
}

.empty-state {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9rem;
  padding: 1rem;
  margin: 0;
}

/* GAME PAGE STYLES */
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-icon-text {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-light);
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-icon-text:hover {
  background: rgba(255, 255, 255, 0.2);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--text-dim);
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-ghost:hover {
  border-color: var(--text-light);
  color: var(--text-light);
}

.game-info .mini-title {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.badges {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.2rem;
}

.badge {
  font-size: 0.75rem;
  padding: 0.1rem 0.5rem;
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-glow);
  border-radius: 4px;
  font-weight: 700;
}

.level-badge {
  background: rgba(139, 92, 246, 0.15);
  color: var(--primary-glow);
}

.stats-bar {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2rem;
  gap: 1rem;
}

.stat-item {
  background: rgba(0, 0, 0, 0.2);
  flex: 1;
  padding: 0.8rem;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-item .label {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
}

.stat-item .value {
  font-size: 1.4rem;
  font-weight: 700;
  font-family: var(--font-heading);
  color: white;
}

/* Question Area */
.game-display {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.question-container {
  text-align: center;
}

.question-box {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 0 40px rgba(139, 92, 246, 0.1);
}

#questionText {
  font-size: 3.5rem;
  margin: 0;
  font-family: var(--font-heading);
  background: linear-gradient(135deg, #fff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 0 rgba(0, 0, 0, 0.2));
}

.status-msg {
  min-height: 1.5rem;
  color: var(--text-dim);
  font-size: 1rem;
  margin: 0;
}

.status-msg.ok {
  color: var(--success);
  font-weight: 700;
}

.status-msg.err {
  color: var(--error);
  font-weight: 700;
}

/* Timer & Progress */
.timer-container {
  background: rgba(0, 0, 0, 0.2);
  padding: 0.8rem 1rem;
  border-radius: var(--radius-md);
}

.timer-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  color: var(--text-light);
  font-weight: 600;
}

.progress-track {
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  width: 0%;
  /* JS will control this */
  transition: background 0.3s ease;
}

.progress-fill.warn {
  background: linear-gradient(90deg, #fbbf24, #f59e0b);
}

.progress-fill.danger {
  background: linear-gradient(90deg, #f87171, #ef4444);
}

/* Options Grid */
.options-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
}

.option-btn {
  border: none;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 1.2rem 0;
  font-size: 1.8rem;
  font-family: var(--font-heading);
  color: white;
  cursor: pointer;
  transition: all 0.15s ease;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.2);
}

.option-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.5);
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.2), 0 0 20px rgba(139, 92, 246, 0.4);
}

.option-btn:active:not(:disabled) {
  transform: translateY(2px);
  box-shadow: 0 0 0 rgba(0, 0, 0, 0.2);
}

.option-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(8px);
  display: grid;
  place-items: center;
  padding: 1rem;
}

.modal-content {
  width: min(400px, 100%);
  text-align: center;
  border: 2px solid var(--glass-border);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  background: radial-gradient(circle at top, #2e1065, #0f172a);
}

.modal-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  animation: bounce 1s infinite;
}

.result-text {
  font-size: 1.2rem;
  color: var(--accent-glow);
  margin-bottom: 1.5rem;
  font-weight: 700;
}

.input-group {
  text-align: left;
  margin-bottom: 1.5rem;
}

.input-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.custom-input {
  width: 100%;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: rgba(0, 0, 0, 0.3);
  color: white;
  font-size: 1rem;
  font-family: var(--font-body);
}

.custom-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.2);
}

.full-width {
  width: 100%;
}

.error-msg {
  color: var(--error);
  font-size: 0.8rem;
  margin-top: 0.4rem;
  min-height: 1.2em;
}

#confettiCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 99;
}

/* Responsive adjustments */
@media (max-width: 600px) {
  .glass-panel {
    padding: 1.5rem;
  }

  .difficulty-grid {
    gap: 0.5rem;
  }

  .diff-content {
    padding: 0.8rem 0.2rem;
  }

  .diff-card .icon {
    font-size: 1.5rem;
  }

  .main-title {
    font-size: 2.2rem;
  }

  .stats-bar {
    gap: 0.5rem;
  }

  .stat-item .value {
    font-size: 1.1rem;
  }
}

@keyframes bounce {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}
/* Adventure Card */
.more-adventures {
  margin-top: 2rem;
  margin-bottom: 2rem;
}

.adventure-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: inherit;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  cursor: pointer;
}

.adventure-card:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.2);
}

.adventure-card .icon {
  font-size: 2rem;
  animation: float 6s ease-in-out infinite;
}

.adventure-card .info {
  text-align: left;
  flex: 1;
}

.adventure-card .name {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--accent-glow);
  font-family: var(--font-heading);
  margin-bottom: 0.2rem;
}

.adventure-card .desc {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.adventure-card .arrow {
  font-size: 1.2rem;
  color: var(--text-dim);
  transition: transform 0.2s;
}

.adventure-card:hover .arrow {
  transform: translateX(4px);
  color: var(--text-light);
}