:root {
  --bg-color: #0c0d10;
  --panel-bg: rgba(22, 25, 31, 0.85);
  --panel-border: rgba(255, 255, 255, 0.1);
  --text-primary: #f5f5f5;
  --text-secondary: #cdd6e2;
  --accent-red: #de1c26;
  --accent-yellow: #ffcc44;
  --accent-green: #2cb45c;
  --accent-blue: #2574e0;
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-main);
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  width: 100vw;
}

#game-container {
  position: relative;
  width: 900px;
  height: 640px;
  background: #378446;
  overflow: hidden;
  transform-origin: center center;
}

canvas {
  display: block;
  width: 900px;
  height: 640px;
}

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  z-index: 10;
  transition: opacity 0.4s ease, visibility 0.4s;
}

.overlay.hidden {
  opacity: 0;
  visibility: hidden;
}

.menu-card {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  padding: 3rem;
  border-radius: 20px;
  text-align: center;
  max-width: 500px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

h1 {
  font-size: 4rem;
  font-weight: 800;
  letter-spacing: -2px;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #fff 0%, #aaa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

p.subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
}

button {
  background: var(--accent-green);
  color: white;
  border: none;
  padding: 1rem 3rem;
  font-size: 1.25rem;
  font-weight: 700;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 15px rgba(44, 180, 92, 0.3);
}

button:hover {
  background: #43d274;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(44, 180, 92, 0.4);
}

button:active {
  transform: translateY(0);
}

#hud {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  padding: 1rem;
  border-radius: 12px;
  pointer-events: none;
  z-index: 5;
  min-width: 180px;
}

.hud-item {
  margin-bottom: 0.5rem;
}

.hud-item:last-child {
  margin-bottom: 0;
}

.hud-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  display: block;
}

.hud-value {
  font-size: 1.25rem;
  font-weight: 700;
}

#score-val { color: white; }
#best-val { color: var(--text-secondary); font-size: 1rem; }
#speed-val { color: var(--accent-yellow); }
#level-val { color: var(--accent-green); }

.crashed-text {
  color: var(--accent-red);
  font-size: 3.5rem;
  font-weight: 900;
  margin-bottom: 1rem;
}

.final-score {
  font-size: 1.5rem;
  color: var(--accent-yellow);
  margin-bottom: 2rem;
}

.restart-hint {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 1.5rem;
}

/* Sound Toggle Button */
#sound-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 15;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  color: var(--text-primary);
  padding: 0.5rem 0.75rem;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-main);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  transition: background 0.2s, transform 0.15s;
  pointer-events: all;
}

#sound-btn:hover {
  background: rgba(36, 42, 52, 0.95);
  transform: translateY(-1px);
  box-shadow: 0 5px 14px rgba(0,0,0,0.35);
}

#sound-btn:active {
  transform: translateY(0);
}

#sound-btn svg {
  flex-shrink: 0;
}

#sound-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Touch Controls */
#touch-controls {
  display: none;
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  flex-direction: row;
  align-items: center;
  gap: 1rem;
  z-index: 20;
  pointer-events: all;
}

.touch-throttle {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.touch-btn {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.25);
  color: white;
  font-size: 1.5rem;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 12px;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: background 0.15s;
  padding: 0;
  box-shadow: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.touch-btn:hover, .touch-btn:active {
  background: rgba(255,255,255,0.25);
  transform: none;
  box-shadow: none;
}

/* Responsive adjustments */
@media (max-width: 920px) {
  #game-container {
    width: 100vw;
    height: 100vh;
    border-radius: 0;
  }
  #touch-controls {
    display: flex;
  }
}