:root {
  --ink: #ffffff;
  --gold: #ffd23f;
  --stroke: rgba(8, 14, 32, 0.85);
  --panel: rgba(12, 20, 44, 0.82);
  --panel-edge: rgba(255, 255, 255, 0.16);
  --accent: #6df0ff;
  --danger: #ff6b5e;
  --pad: clamp(10px, 2.2vw, 26px);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #060b1c;
  color: var(--ink);
  font-family: 'Fredoka', 'Trebuchet MS', 'Segoe UI', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

#app { position: fixed; inset: 0; }
#scene { display: block; width: 100%; height: 100%; touch-action: none; }

/* ---------------- HUD ---------------- */
.hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
  padding: calc(var(--pad) + env(safe-area-inset-top)) var(--pad)
           calc(var(--pad) + env(safe-area-inset-bottom));
}

.hud-corner { position: absolute; top: calc(var(--pad) + env(safe-area-inset-top)); }
.hud-left { left: var(--pad); }
.hud-right { right: var(--pad); text-align: right; }

.stat-big {
  font-size: clamp(20px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.05;
  color: var(--gold);
  text-shadow:
    -2px -2px 0 var(--stroke), 2px -2px 0 var(--stroke),
    -2px 2px 0 var(--stroke), 2px 2px 0 var(--stroke),
    0 6px 14px rgba(0, 0, 0, 0.45);
}
.stat-big span { color: #fff; }

.stat-small {
  font-size: clamp(12px, 1.9vw, 22px);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
  text-shadow: -1.5px -1.5px 0 var(--stroke), 1.5px -1.5px 0 var(--stroke),
               -1.5px 1.5px 0 var(--stroke), 1.5px 1.5px 0 var(--stroke);
}

.hud-top-center {
  position: absolute;
  top: calc(var(--pad) + env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  width: min(42vw, 360px);
  text-align: center;
}

.level-name {
  font-size: clamp(11px, 1.5vw, 16px);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.85;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.6);
}

.coverage { margin-top: 6px; }
.coverage-track {
  height: 10px;
  border-radius: 999px;
  background: rgba(6, 12, 30, 0.6);
  border: 2px solid rgba(255, 255, 255, 0.28);
  overflow: hidden;
}
.coverage-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, #7ad0ff, #7f86a8 55%, var(--danger));
  transition: width 0.25s ease-out;
}
.coverage-label {
  margin-top: 4px;
  font-size: clamp(10px, 1.3vw, 14px);
  opacity: 0.8;
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.6);
}

.laser-chip {
  position: absolute;
  left: var(--pad);
  bottom: calc(var(--pad) + 52px + env(safe-area-inset-bottom));
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--panel);
  border: 2px solid var(--accent);
  color: var(--accent);
  font-weight: 700;
  font-size: clamp(12px, 1.6vw, 16px);
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.laser-chip[hidden] { display: none; }
.laser-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 0.7s infinite alternate;
}
@keyframes pulse { from { opacity: 0.35; } to { opacity: 1; } }

.banner {
  position: absolute;
  left: 50%;
  bottom: calc(var(--pad) + 58px + env(safe-area-inset-bottom));
  transform: translate(-50%, 18px);
  padding: 10px 26px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.95);
  color: #16203d;
  font-size: clamp(18px, 3vw, 34px);
  font-weight: 700;
  white-space: nowrap;
  border: 4px solid rgba(20, 30, 60, 0.9);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
  opacity: 0;
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.banner.show { opacity: 1; transform: translate(-50%, 0); }
.banner.danger { background: var(--danger); color: #fff; }
.banner.good { background: var(--gold); }

.hud-buttons {
  position: absolute;
  right: var(--pad);
  bottom: calc(var(--pad) + env(safe-area-inset-bottom));
  display: flex;
  gap: 8px;
  pointer-events: auto;
}

.hint {
  position: absolute;
  left: var(--pad);
  bottom: calc(var(--pad) + env(safe-area-inset-bottom));
  max-width: 44vw;
  font-size: clamp(10px, 1.4vw, 14px);
  opacity: 0.6;
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.7);
}

/* ---------------- Buttons ---------------- */
.btn {
  pointer-events: auto;
  font-family: inherit;
  font-weight: 700;
  font-size: clamp(12px, 1.6vw, 17px);
  letter-spacing: 0.06em;
  color: #0d1730;
  background: var(--gold);
  border: 3px solid rgba(15, 24, 48, 0.9);
  border-radius: 14px;
  padding: 10px 20px;
  cursor: pointer;
  box-shadow: 0 5px 0 rgba(15, 24, 48, 0.85);
  transition: transform 0.08s ease, box-shadow 0.08s ease, filter 0.15s ease;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: translateY(4px); box-shadow: 0 1px 0 rgba(15, 24, 48, 0.85); }
.btn.ghost {
  background: var(--panel);
  color: #fff;
  border-color: var(--panel-edge);
  box-shadow: 0 4px 0 rgba(6, 10, 26, 0.7);
  backdrop-filter: blur(6px);
}

/* ---------------- Overlays ---------------- */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(4, 8, 22, 0.62);
  backdrop-filter: blur(3px);
  z-index: 10;
}
.overlay[hidden] { display: none; }

.card {
  width: min(560px, 94vw);
  max-height: 88vh;
  overflow-y: auto;
  background: linear-gradient(180deg, rgba(20, 30, 60, 0.96), rgba(10, 16, 38, 0.96));
  border: 4px solid rgba(255, 255, 255, 0.14);
  border-radius: 22px;
  padding: clamp(20px, 4vw, 34px);
  text-align: center;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
}

.logo {
  margin: 0 0 6px;
  font-size: clamp(34px, 8vw, 62px);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
  text-shadow: -3px -3px 0 var(--stroke), 3px -3px 0 var(--stroke),
               -3px 3px 0 var(--stroke), 3px 3px 0 var(--stroke);
}
.card h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 4.4vw, 34px);
  color: var(--gold);
}
.card p { margin: 8px 0; font-size: clamp(13px, 2vw, 17px); line-height: 1.5; }
.muted { opacity: 0.72; }
.tip { color: var(--accent); font-weight: 600; }

.card-buttons {
  margin-top: 20px;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.controls-grid {
  margin: 16px 0 4px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  text-align: left;
}
.controls-grid div {
  background: rgba(255, 255, 255, 0.07);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: clamp(12px, 1.8vw, 15px);
}
.controls-grid b { color: var(--gold); display: block; }

.stats-row {
  display: flex;
  justify-content: center;
  gap: clamp(12px, 4vw, 34px);
  margin: 18px 0 4px;
}
.stats-row div { font-size: clamp(11px, 1.6vw, 14px); opacity: 0.75; }
.stats-row strong {
  display: block;
  font-size: clamp(22px, 4vw, 32px);
  color: #fff;
  opacity: 1;
}

.settings-card { text-align: left; }
.settings-card h2 { text-align: center; }
.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: clamp(13px, 2vw, 16px);
}
.row input[type='checkbox'] { width: 22px; height: 22px; accent-color: var(--gold); }
.row input[type='range'] { accent-color: var(--gold); flex: 0 0 160px; }
.row select {
  font-family: inherit;
  font-size: 14px;
  padding: 6px 10px;
  border-radius: 8px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  background: #16203d;
  color: #fff;
}

.theme-badge {
  display: inline-block;
  margin-bottom: 10px;
  padding: 5px 16px;
  border-radius: 999px;
  font-size: clamp(11px, 1.6vw, 14px);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.18);
}

@media (max-width: 620px) {
  .hint { display: none; }
  .hud-buttons #btn-fullscreen { display: none; }
  .hud-buttons .btn { padding: 8px 12px; }
  /* Drop the coverage bar below the corner readouts so nothing overlaps. */
  .hud-top-center {
    top: calc(var(--pad) + 52px + env(safe-area-inset-top));
    width: min(82vw, 320px);
  }
  .banner { max-width: 92vw; white-space: normal; text-align: center; }
  .laser-chip { bottom: calc(var(--pad) + 48px + env(safe-area-inset-bottom)); }
}