:root {
  /* Dark mode (default) */
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-tertiary: #0f3460;
  --bg-container: rgba(255, 255, 255, 0.05);
  --bg-overlay: rgba(255, 255, 255, 0.1);
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-tertiary: #666666;
  --accent-color: #ff6b6b;
  --success-color: #4ade80;
  --error-color: #f87171;
  --warning-color: #ffc107;
  --border-color: rgba(255, 255, 255, 0.1);
  --shadow: rgba(0, 0, 0, 0.3);
}

body.light-mode {
  /* Light mode */
  --bg-primary: #f5f5f5;
  --bg-secondary: #e8e8e8;
  --bg-tertiary: #d4d4d4;
  --bg-container: rgba(255, 255, 255, 0.9);
  --bg-overlay: rgba(0, 0, 0, 0.05);
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a4a;
  --text-tertiary: #888888;
  --accent-color: #e63946;
  --success-color: #2d8659;
  --error-color: #dc2626;
  --warning-color: #d97706;
  --border-color: rgba(0, 0, 0, 0.1);
  --shadow: rgba(0, 0, 0, 0.1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  color: var(--text-primary);
  transition: background 0.3s ease, color 0.3s ease;
}

.app-container {
  background: var(--bg-container);
  backdrop-filter: blur(10px);
  border-radius: 24px;
  padding: 32px;
  max-width: 500px;
  width: 100%;
  box-shadow: 0 8px 32px var(--shadow);
  transition: background 0.3s ease;
}

.header {
  text-align: center;
  margin-bottom: 24px;
}

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

.header-title-section {
  display: flex;
  align-items: center;
  gap: 12px;
}

.app-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px var(--shadow));
  transition: transform 0.3s ease;
}

.app-logo:hover {
  transform: scale(1.1) rotate(5deg);
}

.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.header h1 {
  color: var(--text-primary);
  font-size: 28px;
  font-weight: 700;
  margin: 0;
}

.header p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 8px;
}

.stats-preview {
  display: flex;
  gap: 16px;
  justify-content: center;
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 8px;
  flex-wrap: wrap;
}

.guesses-remaining {
  font-weight: 600;
  color: var(--accent-color);
}

.guesses-remaining.no-guesses {
  color: var(--error-color);
}

.theme-toggle,
.quest-log-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  background: var(--bg-overlay);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all 0.3s ease;
}

.theme-toggle:hover,
.quest-log-btn:hover {
  background: var(--accent-color);
  border-color: var(--accent-color);
  transform: scale(1.1);
}

.celebrity-image {
  width: 100%;
  height: 300px;
  border-radius: 16px;
  object-fit: cover;
  margin-bottom: 24px;
  background: var(--bg-overlay);
  position: relative;
  overflow: hidden;
}

.celebrity-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.zoom-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  background: #2d2d2d;
  border-radius: 16px;
  border: 3px solid var(--accent-color);
  overflow: hidden;
  cursor: default;
}

.zoom-canvas {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 150%;
  height: 150%;
  object-fit: cover;
}

.zoom-label {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--accent-color);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  z-index: 10;
}

.zoom-controls {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  justify-content: center;
}

.zoom-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--bg-overlay);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: all 0.3s ease;
}

.zoom-btn:hover {
  background: var(--accent-color);
  transform: scale(1.1);
}

.options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.option-btn {
  padding: 16px;
  border-radius: 12px;
  border: 2px solid var(--border-color);
  background: var(--bg-overlay);
  color: var(--text-primary);
  font-family: 'Poppins', sans-serif;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.option-btn:hover {
  background: var(--bg-container);
  border-color: var(--accent-color);
}

.option-btn:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.option-btn.selected {
  border-color: var(--success-color);
  background: rgba(74, 222, 128, 0.2);
}

.option-btn.correct {
  border-color: var(--success-color);
  background: rgba(74, 222, 128, 0.3);
}

.option-btn.wrong {
  border-color: var(--error-color);
  background: rgba(248, 113, 113, 0.2);
}

.result-info {
  text-align: center;
  margin-top: 24px;
}

.result-info h3 {
  color: var(--success-color);
  font-size: 20px;
  margin-bottom: 8px;
}

.result-info p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 14px;
}

.play-again-btn {
  padding: 12px 32px;
  border-radius: 30px;
  border: none;
  background: linear-gradient(135deg, var(--success-color), #22c55e);
  color: white;
  font-family: 'Poppins', sans-serif;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.play-again-btn:hover {
  transform: scale(1.05);
}

.hint-section {
  text-align: center;
  margin-bottom: 20px;
}

.hint-section p {
  color: var(--text-secondary);
  font-size: 13px;
}

.hint-badge {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(255, 193, 7, 0.2);
  color: var(--warning-color);
  border-radius: 20px;
  font-size: 12px;
  margin-top: 8px;
}

.loading {
  text-align: center;
  color: var(--text-secondary);
}

.loading span {
  display: inline-block;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.progress-bar {
  height: 4px;
  background: var(--bg-overlay);
  border-radius: 2px;
  margin-bottom: 20px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--success-color), #22c55e);
  transition: width 0.3s ease;
}

.confetti {
  position: fixed;
  pointer-events: none;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
}

.confetti-piece {
  position: absolute;
  width: 10px;
  height: 10px;
  animation: confetti-fall 3s ease-out forwards;
}

@keyframes confetti-fall {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}

.error-message {
  color: var(--error-color);
  text-align: center;
  padding: 16px;
  background: rgba(248, 113, 113, 0.1);
  border-radius: 8px;
  margin-bottom: 16px;
}

.limit-message {
  text-align: center;
  padding: 40px 20px;
  background: var(--bg-overlay);
  border-radius: 16px;
  margin: 40px 0;
  border: 2px solid var(--error-color);
}

.limit-message h2 {
  color: var(--text-primary);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}

.limit-message p {
  color: var(--text-secondary);
  font-size: 16px;
  margin: 12px 0;
  line-height: 1.6;
}

.limit-message p:first-of-type {
  color: var(--error-color);
  font-weight: 600;
}

/* Quest Log Styles */
.quest-log-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  padding: 20px;
  animation: fadeIn 0.3s ease;
}

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

.quest-log {
  background: var(--bg-container);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 24px;
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px var(--shadow);
  position: relative;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    transform: translateY(50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.quest-log-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--border-color);
}

.quest-log-header h2 {
  color: var(--text-primary);
  font-size: 24px;
  font-weight: 700;
}

.close-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--bg-overlay);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  line-height: 1;
  transition: all 0.3s ease;
}

.close-btn:hover {
  background: var(--error-color);
  transform: rotate(90deg);
}

.quest-log-content {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.stats-section,
.achievements-section {
  width: 100%;
}

.stats-section h3,
.achievements-section h3 {
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.stat-card {
  background: var(--bg-overlay);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
  border: 2px solid var(--border-color);
  transition: all 0.3s ease;
}

.stat-card:hover {
  border-color: var(--accent-color);
  transform: translateY(-2px);
}

.stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent-color);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.achievements-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  max-height: 400px;
  overflow-y: auto;
  padding-right: 8px;
}

.achievement-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-overlay);
  border-radius: 12px;
  border: 2px solid var(--border-color);
  transition: all 0.3s ease;
}

.achievement-item.unlocked {
  border-color: var(--success-color);
  background: rgba(74, 222, 128, 0.1);
}

.achievement-item.locked {
  opacity: 0.5;
}

.achievement-item:hover {
  transform: translateX(4px);
}

.achievement-icon-large {
  font-size: 32px;
  min-width: 40px;
  text-align: center;
}

.achievement-info {
  flex: 1;
}

.achievement-name-item {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.achievement-desc-item {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Achievement Notification */
.achievement-notification {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--bg-container);
  backdrop-filter: blur(20px);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 8px 32px var(--shadow);
  z-index: 10001;
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 300px;
  border: 2px solid var(--success-color);
  transform: translateX(400px);
  opacity: 0;
  transition: all 0.5s ease;
}

.achievement-notification.show {
  transform: translateX(0);
  opacity: 1;
}

.achievement-icon {
  font-size: 48px;
  min-width: 60px;
  text-align: center;
}

.achievement-content {
  flex: 1;
}

.achievement-title {
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.achievement-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.achievement-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Footer */
.app-footer {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.app-footer p {
  color: var(--text-secondary);
  font-size: 12px;
  margin: 0;
  opacity: 0.7;
}

/* Scrollbar styling */
.quest-log::-webkit-scrollbar,
.achievements-grid::-webkit-scrollbar {
  width: 6px;
}

.quest-log::-webkit-scrollbar-track,
.achievements-grid::-webkit-scrollbar-track {
  background: var(--bg-overlay);
  border-radius: 3px;
}

.quest-log::-webkit-scrollbar-thumb,
.achievements-grid::-webkit-scrollbar-thumb {
  background: var(--accent-color);
  border-radius: 3px;
}

.quest-log::-webkit-scrollbar-thumb:hover,
.achievements-grid::-webkit-scrollbar-thumb:hover {
  background: var(--success-color);
}