:root {
  --cyan: #4de8ff;
  --magenta: #ff4d9a;
  --gold: #ffd166;
  --bg: #05060f;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: #e8f4ff;
  font-family: Rajdhani, sans-serif;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

#app {
  position: relative;
  width: 100%;
  height: 100%;
}

#game {
  display: block;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at 50% 120%, #12183a 0%, #05060f 70%);
}

#hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 16px 22px;
  pointer-events: none;
  text-shadow: 0 0 12px rgba(77, 232, 255, 0.55);
}

.hud-label {
  font-family: Orbitron, sans-serif;
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--cyan);
  opacity: 0.75;
}

#score, #wave {
  font-family: Orbitron, sans-serif;
  font-size: 28px;
  font-weight: 800;
  line-height: 1.1;
}

#lives {
  display: flex;
  gap: 6px;
  margin-top: 6px;
  justify-content: flex-end;
}

.heart {
  width: 16px;
  height: 16px;
  clip-path: polygon(50% 0, 100% 35%, 82% 100%, 18% 100%, 0 35%);
  background: linear-gradient(180deg, #ff7ab8, var(--magenta));
  box-shadow: 0 0 10px var(--magenta);
}

.heart.gone { opacity: 0.18; filter: grayscale(1); }

#combo {
  position: absolute;
  top: 72px;
  left: 50%;
  transform: translateX(-50%);
  font-family: Orbitron, sans-serif;
  font-size: 22px;
  color: var(--gold);
  text-shadow: 0 0 16px rgba(255, 209, 102, 0.8);
  pointer-events: none;
}

#overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 40%, rgba(10, 16, 40, 0.55), rgba(5, 6, 15, 0.86));
}

.panel {
  text-align: center;
  padding: 28px 32px;
  max-width: 420px;
  position: relative;
}

.logo-ring {
  width: 84px;
  height: 84px;
  margin: 0 auto 12px;
  border-radius: 50%;
  border: 2px solid var(--cyan);
  box-shadow: 0 0 24px rgba(77, 232, 255, 0.45), inset 0 0 18px rgba(77, 232, 255, 0.2);
  background:
    radial-gradient(circle at 50% 50%, rgba(255, 77, 154, 0.55), transparent 55%),
    conic-gradient(from 210deg, transparent, var(--cyan), transparent 40%);
  animation: spin 8s linear infinite;
}

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

h1 {
  font-family: Orbitron, sans-serif;
  font-size: 48px;
  letter-spacing: 0.22em;
  color: #fff;
  text-shadow: 0 0 22px rgba(77, 232, 255, 0.7);
}

h2 {
  font-family: Orbitron, sans-serif;
  font-size: 28px;
  letter-spacing: 0.16em;
  margin-bottom: 14px;
  color: var(--magenta);
  text-shadow: 0 0 18px rgba(255, 77, 154, 0.65);
}

.tagline {
  font-size: 18px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 4px 0 16px;
}

.hint, .controls, .best, .go-score, .go-wave {
  color: #b7c8e8;
  font-size: 16px;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 16px 0 10px;
  opacity: 0.85;
}

.btn {
  margin-top: 14px;
  border: 0;
  cursor: pointer;
  font-family: Orbitron, sans-serif;
  font-size: 14px;
  letter-spacing: 0.22em;
  padding: 12px 28px;
  color: #041018;
  background: linear-gradient(180deg, #7af0ff, var(--cyan));
  box-shadow: 0 0 22px rgba(77, 232, 255, 0.55);
  border-radius: 2px;
}

.btn:hover { filter: brightness(1.08); }

.btn-ghost {
  display: block;
  margin: 10px auto 0;
  background: transparent;
  color: var(--cyan);
  border: 1px solid rgba(77, 232, 255, 0.45);
  box-shadow: none;
}

.icon-btn {
  position: absolute;
  top: 14px;
  right: 18px;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(77, 232, 255, 0.4);
  background: rgba(5, 8, 20, 0.55);
  color: var(--cyan);
  font-family: Orbitron, sans-serif;
  cursor: pointer;
  z-index: 4;
}

#touch-fire {
  position: absolute;
  right: 18px;
  bottom: 22px;
  padding: 16px 22px;
  border: 1px solid rgba(255, 77, 154, 0.55);
  color: #ffd0e4;
  font-family: Orbitron, sans-serif;
  font-size: 12px;
  letter-spacing: 0.18em;
  background: rgba(255, 77, 154, 0.18);
  border-radius: 4px;
  z-index: 4;
}

.hidden { display: none !important; }

@media (max-width: 640px) {
  h1 { font-size: 34px; letter-spacing: 0.14em; }
  #score, #wave { font-size: 22px; }
}