@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700;800;900&family=Inter:wght@300;400;500;600&display=swap');

:root {
  --bg-primary: #0a0a1a;
  --bg-secondary: #12122a;
  --bg-glass: rgba(15, 15, 40, 0.75);
  --border-glass: rgba(0, 229, 255, 0.15);
  --text-primary: #e0e0ff;
  --text-secondary: #8888bb;
  --accent-cyan: #00e5ff;
  --accent-purple: #d500f9;
  --accent-pink: #ff1744;
  --glow-cyan: 0 0 20px rgba(0, 229, 255, 0.3);
  --glow-purple: 0 0 20px rgba(213, 0, 249, 0.3);
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: 'Inter', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
}

#game-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

/* ===== HUD ===== */
.hud {
  position: fixed;
  z-index: 10;
  pointer-events: none;
}

.hud > * {
  pointer-events: auto;
}

/* Title */
.hud-top {
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
}

.game-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
  filter: drop-shadow(0 0 10px rgba(0, 229, 255, 0.4));
}

/* Score panel */
.hud-left {
  top: 80px;
  left: 20px;
}

.panel {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 20px;
  min-width: 200px;
}

.panel-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-row:last-child {
  border-bottom: none;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.stat-value {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Controls info */
.hud-bottom {
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
}

.controls-info {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 10px 20px;
  display: flex;
  gap: 20px;
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.control-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

kbd {
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.65rem;
  color: var(--accent-cyan);
}

/* Settings panel */
.hud-right {
  top: 80px;
  right: 20px;
}

.setting-row {
  margin-bottom: 14px;
}

.setting-row:last-child {
  margin-bottom: 0;
}

.setting-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.setting-value {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

/* Slider */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-cyan);
  cursor: pointer;
  box-shadow: var(--glow-cyan);
  transition: transform 0.15s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-cyan);
  cursor: pointer;
  border: none;
  box-shadow: var(--glow-cyan);
}

/* Buttons */
.btn {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  padding: 10px 24px;
  border: 1px solid var(--accent-cyan);
  border-radius: 8px;
  background: rgba(0, 229, 255, 0.08);
  color: var(--accent-cyan);
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
  margin-top: 14px;
}

.btn:hover {
  background: rgba(0, 229, 255, 0.2);
  box-shadow: var(--glow-cyan);
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.3), rgba(213, 0, 249, 0.3));
  border-color: var(--accent-purple);
}

.btn-primary:hover {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.5), rgba(213, 0, 249, 0.5));
  box-shadow: var(--glow-purple);
}

/* Overlays */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(5, 5, 20, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.overlay-content {
  text-align: center;
  padding: 40px;
}

.overlay-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.overlay-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.overlay-score {
  font-family: 'Orbitron', sans-serif;
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent-cyan);
  margin-bottom: 24px;
  text-shadow: var(--glow-cyan);
}

.overlay .btn {
  width: auto;
  display: inline-block;
  min-width: 180px;
}

/* Start Screen */
.start-overlay {
  opacity: 1;
  pointer-events: auto;
}

.start-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 3.5rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 20px rgba(0, 229, 255, 0.5));
}

.start-subtitle {
  font-family: 'Orbitron', sans-serif;
  font-size: 1rem;
  letter-spacing: 0.3em;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

/* Direction badge */
.direction-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: 6px;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

/* Animations */
@keyframes pulse-glow {
  0%, 100% { filter: drop-shadow(0 0 10px rgba(0, 229, 255, 0.3)); }
  50% { filter: drop-shadow(0 0 20px rgba(0, 229, 255, 0.6)); }
}

.game-title {
  animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes float-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.panel {
  animation: float-in 0.5s ease-out;
}

/* Responsive */
@media (max-width: 768px) {
  .hud-left, .hud-right {
    display: none;
  }

  .controls-info {
    flex-wrap: wrap;
    justify-content: center;
    font-size: 0.65rem;
    gap: 10px;
  }

  .game-title {
    font-size: 1.2rem;
  }
}