/* Void Drifter — polished styling */
:root {
  --bg: #050510;
  --bg2: #0a0a1a;
  --fg: #c8d8e8;
  --fg-dim: rgba(200,216,232,0.5);
  --accent: #00d4ff;
  --accent2: #0088cc;
  --accent-glow: rgba(0,212,255,0.35);
  --danger: #ff3355;
  --danger-glow: rgba(255,51,85,0.3);
  --gold: #ffd740;
  --gold-glow: rgba(255,215,64,0.3);
  --panel: rgba(8,12,28,0.82);
  --panel-border: rgba(0,180,255,0.18);
  --radius: 8px;
  --radius-sm: 5px;
}

html[data-theme="light"] {
  --bg: #e8ecf2;
  --bg2: #dce2ea;
  --fg: #1a2233;
  --fg-dim: rgba(26,34,51,0.45);
  --accent: #0077bb;
  --accent2: #005588;
  --accent-glow: rgba(0,119,187,0.25);
  --danger: #cc2244;
  --danger-glow: rgba(204,34,68,0.2);
  --gold: #cc9900;
  --gold-glow: rgba(204,153,0,0.25);
  --panel: rgba(255,255,255,0.82);
  --panel-border: rgba(0,100,170,0.18);
}

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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--bg);
  font-family: 'Courier New', Courier, monospace, system-ui, sans-serif;
  touch-action: manipulation;
  color-scheme: dark;
}

html[data-theme="light"] {
  color-scheme: light;
}

#gameCanvas {
  display: block;
  width: 100%; height: 100%;
  position: absolute;
  top: 0; left: 0;
}

/* ── Vignette + scanlines ── */
#gameCanvas::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 1;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(0,0,0,0.45) 100%);
}

/* ── UI overlay ── */
#ui-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 10;
}

/* ── HUD ── */
#hud {
  position: absolute;
  top: 0; left: 0; right: 0;
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  pointer-events: none;
}

.hud-panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 6px 12px;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 1.2px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 2px 12px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.04);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.hud-panel .label {
  color: var(--fg-dim);
  font-size: 8px;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 2px;
}

.hud-panel .value {
  font-size: 18px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

#hud-wave .value {
  color: var(--gold);
  text-shadow: 0 0 8px var(--gold-glow);
}

#hud-score .value {
  color: var(--accent);
  text-shadow: 0 0 8px var(--accent-glow);
}

/* ── Lives ── */
#lives-bar {
  position: absolute;
  top: 46px;
  left: 14px;
  display: flex;
  gap: 6px;
  pointer-events: none;
}

#lives-bar .life-icon {
  width: 20px;
  height: 20px;
  filter: drop-shadow(0 0 4px var(--accent-glow));
  transition: opacity 0.3s, transform 0.3s;
}

/* ── Powerup indicator ── */
#powerup-indicator {
  position: absolute;
  top: 46px;
  right: 14px;
  font-size: 11px;
  font-weight: 700;
  color: var(--gold);
  text-shadow: 0 0 10px var(--gold-glow);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  transform: translateY(-4px);
  background: var(--panel);
  border: 1px solid rgba(255,215,64,0.2);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  letter-spacing: 1px;
}

#powerup-indicator.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Status text ── */
#status-text {
  position: absolute;
  top: 48%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: clamp(14px, 3.5vw, 20px);
  font-weight: 700;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.35s, transform 0.35s;
  white-space: nowrap;
  text-shadow: 0 0 16px currentColor;
}

#status-text.visible {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.05);
}

/* ── Wave announce ── */
#wave-announce {
  position: absolute;
  top: 42%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  font-size: clamp(22px, 6vw, 42px);
  font-weight: 700;
  color: var(--accent);
  text-shadow: 0 0 20px var(--accent-glow), 0 0 40px rgba(0,136,204,0.3);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.5s, transform 0.5s;
  letter-spacing: 4px;
}

#wave-announce.visible {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* ── Flash overlay ── */
#flash-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 5;
  opacity: 0;
  transition: opacity 0.08s;
}

/* ── Touch controls ── */
#touch-controls {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 55%;
  pointer-events: auto;
  display: none;
  z-index: 15;
}

#move-zone {
  position: absolute;
  bottom: 0; left: 0;
  width: 100%; height: 100%;
  touch-action: none;
}

#fire-btn {
  position: absolute;
  bottom: 24px; right: 24px;
  width: 68px; height: 68px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, rgba(0,212,255,0.65), rgba(0,80,160,0.25));
  border: 2px solid rgba(0,212,255,0.45);
  color: var(--accent);
  font-family: inherit;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  box-shadow: 0 0 20px var(--accent-glow), 0 4px 16px rgba(0,0,0,0.4);
  text-shadow: 0 0 6px var(--accent);
  transition: transform 0.1s, box-shadow 0.1s;
}

#fire-btn:active {
  transform: scale(0.88);
  box-shadow: 0 0 30px var(--accent-glow), 0 2px 8px rgba(0,0,0,0.5);
}

/* ── Screens ── */
#menu-screen, #gameover-screen {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
  z-index: 20;
}

#menu-screen {
  background: radial-gradient(ellipse at 50% 40%, rgba(8,16,40,0.96), rgba(3,3,12,0.99));
}

#gameover-screen {
  background: radial-gradient(ellipse at 50% 40%, rgba(30,8,8,0.96), rgba(12,2,2,0.99));
  display: none;
}

.title {
  font-size: clamp(28px, 8vw, 56px);
  font-weight: 700;
  color: var(--accent);
  text-shadow: 0 0 20px var(--accent-glow), 0 0 40px rgba(0,136,204,0.25), 0 0 80px rgba(0,80,160,0.15);
  margin-bottom: 4px;
  letter-spacing: 4px;
  animation: titlePulse 3s ease-in-out infinite;
}

@keyframes titlePulse {
  0%, 100% { text-shadow: 0 0 20px var(--accent-glow), 0 0 40px rgba(0,136,204,0.25); }
  50% { text-shadow: 0 0 28px var(--accent-glow), 0 0 56px rgba(0,136,204,0.35), 0 0 100px rgba(0,80,160,0.2); }
}

.subtitle {
  font-size: clamp(11px, 2.5vw, 16px);
  color: var(--fg-dim);
  margin-bottom: 32px;
  letter-spacing: 5px;
  text-transform: uppercase;
}

.menu-desc {
  color: var(--fg-dim);
  font-size: clamp(11px, 2.2vw, 13px);
  margin-bottom: 26px;
  text-align: center;
  line-height: 1.8;
  max-width: 300px;
}

.btn {
  font-family: inherit;
  font-size: clamp(13px, 2.8vw, 16px);
  font-weight: 700;
  padding: 14px 40px;
  border: 2px solid var(--accent);
  background: rgba(0,212,255,0.06);
  color: var(--accent);
  border-radius: var(--radius);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  transition: all 0.25s;
  text-shadow: 0 0 10px var(--accent-glow);
  box-shadow: 0 0 16px rgba(0,212,255,0.12), inset 0 0 16px rgba(0,212,255,0.06);
  pointer-events: auto;
  margin: 6px;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.1), transparent);
  transition: left 0.4s;
}

.btn:hover::before { left: 100%; }

.btn:hover {
  background: rgba(0,212,255,0.15);
  box-shadow: 0 0 28px rgba(0,212,255,0.25), inset 0 0 20px rgba(0,212,255,0.1);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(1px) scale(0.97);
  box-shadow: 0 0 12px rgba(0,212,255,0.2);
}

.btn-danger {
  border-color: var(--danger);
  color: var(--danger);
  text-shadow: 0 0 10px var(--danger-glow);
  box-shadow: 0 0 16px rgba(255,51,85,0.12);
}

.btn-danger:hover {
  background: rgba(255,51,85,0.12);
  box-shadow: 0 0 28px rgba(255,51,85,0.25);
}

.go-stats {
  font-size: clamp(13px, 2.5vw, 16px);
  color: var(--fg-dim);
  margin: 4px 0;
}

.go-stats .val {
  color: var(--accent);
  font-size: clamp(18px, 4vw, 24px);
  font-weight: 700;
}

.go-best {
  color: var(--gold);
  font-size: clamp(12px, 2.2vw, 14px);
  margin: 12px 0 22px;
  text-shadow: 0 0 8px var(--gold-glow);
}

/* ── Responsive ── */
@media (hover: none) {
  #touch-controls { display: block; }
}

@media (max-width: 380px) {
  .hud-panel { padding: 4px 8px; }
  .hud-panel .value { font-size: 15px; }
  .hud-panel .label { font-size: 7px; }
  #hud { padding: 6px 8px; }
  #lives-bar { top: 40px; left: 8px; gap: 4px; }
  #powerup-indicator { top: 40px; right: 8px; font-size: 10px; padding: 3px 8px; }
}