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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: #1a1a2e;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  min-height: 100dvh;
}

#game-container {
  position: relative;
  width: 600px;
  height: 900px;
  max-width: 100vw;
  max-height: 100vh;
  max-height: 100dvh;
}

#game {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 8px;
  box-shadow: 0 0 40px rgba(0, 200, 255, 0.3);
}

#webcam {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 120px;
  height: 90px;
  border-radius: 8px;
  object-fit: cover;
  transform: scaleX(-1);
  opacity: 0.8;
  z-index: 10;
  border: 2px solid rgba(255, 255, 255, 0.3);
}

#debug-overlay {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 120px;
  z-index: 11;
  pointer-events: none;
}

#hand-canvas {
  width: 120px;
  height: 90px;
  border-radius: 8px;
}

#status {
  color: #0f0;
  font-size: 10px;
  font-family: monospace;
  text-align: center;
  padding: 4px;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 0 0 8px 8px;
}

#switch-cam-btn {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 24px;
  height: 24px;
  padding: 0;
  margin: 0;
  border: none;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.6);
  color: white;
  font-size: 14px;
  cursor: pointer;
  pointer-events: auto;
  z-index: 12;
}

#switch-cam-btn:active {
  background: rgba(255, 255, 255, 0.3);
}

/* Loading overlay */
#loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 50;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(255, 255, 255, 0.2);
  border-top-color: #FFD93D;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  color: white;
  margin-top: 20px;
  font-size: 16px;
}

#ui-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 20;
  pointer-events: none;
}

.screen {
  background: rgba(0, 0, 0, 0.85);
  padding: 30px;
  border-radius: 16px;
  text-align: center;
  color: white;
  pointer-events: auto;
  max-width: 90%;
  backdrop-filter: blur(10px);
}

.screen.hidden {
  display: none;
}

h1 {
  font-size: 42px;
  color: #FFD93D;
  text-shadow: 3px 3px 0 #E31937, 6px 6px 0 rgba(0,0,0,0.3);
  margin-bottom: 10px;
  letter-spacing: 2px;
}

h2 {
  font-size: 28px;
  color: #FFD93D;
  margin-bottom: 20px;
}

.tagline {
  color: #aaa;
  font-style: italic;
  margin-bottom: 25px;
}

button {
  background: linear-gradient(135deg, #E31937, #ff4757);
  color: white;
  border: none;
  padding: 15px 40px;
  font-size: 18px;
  font-weight: bold;
  border-radius: 30px;
  cursor: pointer;
  margin: 10px;
  transition: transform 0.2s, box-shadow 0.2s;
  text-transform: uppercase;
  letter-spacing: 1px;
}

button:hover {
  transform: scale(1.05);
  box-shadow: 0 5px 20px rgba(227, 25, 55, 0.5);
}

button:active {
  transform: scale(0.98);
}

#share-btn {
  background: linear-gradient(135deg, #2196F3, #00BCD4);
}

.menu-buttons {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}

.secondary-btn {
  background: transparent;
  border: 1px solid rgba(33, 150, 243, 0.5);
  color: #64b5f6;
  font-size: 12px;
  padding: 8px 16px;
}

.secondary-btn:hover {
  border-color: rgba(33, 150, 243, 0.8);
  color: #90caf9;
  box-shadow: none;
}

.secondary-btn:disabled {
  opacity: 0.6;
  cursor: default;
  border-color: rgba(255, 255, 255, 0.15);
  color: #999;
}

.secondary-btn:disabled:hover {
  transform: none;
  color: #999;
}

.instructions {
  color: #ccc;
  font-size: 14px;
  line-height: 1.6;
  margin-top: 25px;
}

.fallback {
  color: #888;
  font-size: 12px;
  margin-top: 15px;
}

.score-label {
  color: #888;
  font-size: 14px;
  margin-bottom: 5px;
}

.big-score {
  font-size: 72px;
  font-weight: bold;
  color: #FFD93D;
  text-shadow: 2px 2px 0 #E31937;
  margin-bottom: 10px;
}

.encouragement {
  color: #888;
  font-style: italic;
  margin-bottom: 25px;
}

#score-display {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 15;
}

#score-display.hidden {
  display: none;
}

#score {
  font-size: 48px;
  font-weight: bold;
  color: white;
  text-shadow: 2px 2px 0 #000, 4px 4px 0 rgba(0,0,0,0.3);
}

/* Tutorial / Ready screen */
.tutorial {
  text-align: center;
}

.hand-demo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
}

.hand-icon {
  font-size: 64px;
  animation: pump 1s ease-in-out infinite;
}

.motion-arrow {
  font-size: 48px;
  color: #FFD93D;
  animation: arrow-pulse 1s ease-in-out infinite;
}

@keyframes pump {
  0%, 100% { transform: translateY(20px) rotate(-90deg); }
  50% { transform: translateY(-20px) rotate(-90deg); }
}

@keyframes arrow-pulse {
  0%, 100% { opacity: 0.5; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.2); }
}

.tutorial-text {
  color: #ccc;
  font-size: 16px;
  margin-bottom: 10px;
}

.tutorial-text strong {
  color: #FFD93D;
}

.pump-prompt {
  color: #4CAF50;
  font-size: 20px;
  font-weight: bold;
  animation: pulse 1.5s ease-in-out infinite;
}

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

/* Jump indicator flash */
@keyframes jump-flash {
  0% { box-shadow: inset 0 0 0 0 rgba(255, 217, 61, 0.5); }
  50% { box-shadow: inset 0 0 30px 10px rgba(255, 217, 61, 0.5); }
  100% { box-shadow: inset 0 0 0 0 rgba(255, 217, 61, 0); }
}

#game.jump-flash {
  animation: jump-flash 0.15s ease-out;
}

/* Mobile adjustments */
/* Footer */
.tiny-footer {
  position: fixed;
  bottom: 8px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 11px;
  color: #666;
  font-family: system-ui, sans-serif;
}

.tiny-footer a {
  color: #888;
  text-decoration: none;
}

.tiny-footer a:hover {
  color: #fff;
  text-decoration: underline;
}

@media (max-width: 420px) {
  #game-container {
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    border-radius: 0;
  }

  #game {
    border-radius: 0;
  }

  h1 {
    font-size: 32px;
  }

  .screen {
    padding: 20px;
    border-radius: 12px;
  }

  #webcam, #debug-overlay {
    width: 80px;
  }

  #hand-canvas {
    width: 80px;
    height: 60px;
  }
}