:root {
  color-scheme: dark;
  --bg: #071014;
  --panel: rgba(11, 22, 26, 0.92);
  --text: #f3fbf8;
  --muted: #9fb5b0;
  --line: rgba(255, 255, 255, 0.13);
  --hot: #ffcf4a;
  --cyan: #55e5dc;
  --red: #ff5a66;
  --green: #7bff95;
}

* { box-sizing: border-box; }
html, body, .app { width: 100%; height: 100%; margin: 0; overflow: hidden; }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  touch-action: manipulation;
}

#gameCanvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100dvh;
  display: block;
  background: #071014;
}

.overlay {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: max(18px, env(safe-area-inset-top)) 16px max(18px, env(safe-area-inset-bottom));
  background: linear-gradient(rgba(4, 10, 13, 0.52), rgba(4, 10, 13, 0.76));
  overflow: auto;
}
.overlay--active { display: flex; }

.panel {
  width: min(520px, 100%);
  max-height: 92dvh;
  overflow: auto;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.42);
}
.wide-panel { width: min(860px, 100%); }
.menu-panel { text-align: center; }
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
}

h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(3rem, 18vw, 5.2rem); line-height: 0.9; margin-bottom: 14px; letter-spacing: 0; }
h2 { font-size: 1.7rem; }
h3 { color: var(--cyan); margin: 18px 0 10px; }
.eyebrow {
  margin-bottom: 8px;
  color: var(--hot);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}
.instructions, .small-note { color: var(--muted); line-height: 1.45; }
.sensor-status {
  margin: 14px auto;
  padding: 10px 12px;
  width: fit-content;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--cyan);
  background: rgba(85, 229, 220, 0.08);
}

.stats-row, .button-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}
.stats-row span {
  min-width: 92px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
}
.stats-row strong { display: block; color: var(--text); font-size: 1.2rem; }

button {
  min-height: 44px;
  padding: 10px 15px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,0.08);
  color: var(--text);
  font-weight: 800;
}
button:disabled { opacity: 0.45; }
button.primary { background: linear-gradient(135deg, #ffcf4a, #ff8f3d); color: #111; border: 0; }
button.danger { border-color: rgba(255, 90, 102, 0.5); color: #ffd5d9; }
.icon-button { min-width: 44px; padding: 8px; }

.hud {
  position: fixed;
  top: max(10px, env(safe-area-inset-top));
  left: 10px;
  right: 10px;
  display: none;
  align-items: stretch;
  gap: 7px;
  pointer-events: none;
}
.hud--active { display: flex; }
.hud div, .hud button {
  flex: 1;
  min-width: 0;
  padding: 8px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  background: rgba(4, 10, 13, 0.66);
  backdrop-filter: blur(8px);
  text-align: center;
}
.hud span { display: block; color: var(--muted); font-size: 0.66rem; text-transform: uppercase; }
.hud strong { font-size: clamp(0.9rem, 4vw, 1.25rem); white-space: nowrap; }
.hud button { flex: 0 0 44px; pointer-events: auto; }
.hud .hud-perks {
  flex: 1.25;
}
.hud .hud-perks strong {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: clamp(0.72rem, 3vw, 0.95rem);
}

.countdown {
  position: fixed;
  inset: 0;
  display: none;
  place-items: center;
  font-size: clamp(5rem, 28vw, 9rem);
  font-weight: 900;
  color: var(--hot);
  text-shadow: 0 8px 36px rgba(255, 207, 74, 0.5);
  pointer-events: none;
}
.countdown--active { display: grid; }

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.summary-grid div, .card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,0.055);
  padding: 11px;
}
.summary-grid span, .card .meta { color: var(--muted); font-size: 0.78rem; }
.summary-grid strong { display: block; font-size: 1.18rem; }
.unlock-list { margin: 12px 0; color: var(--green); line-height: 1.45; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 10px;
}
.card h4 { margin: 0 0 6px; }
.card p { margin-bottom: 8px; color: var(--muted); font-size: 0.88rem; line-height: 1.35; }
.card .actions { display: flex; flex-wrap: wrap; gap: 8px; }
.card.locked { opacity: 0.68; }
.tag {
  display: inline-block;
  margin: 2px 4px 8px 0;
  padding: 3px 7px;
  border-radius: 999px;
  background: rgba(85, 229, 220, 0.12);
  color: var(--cyan);
  font-size: 0.72rem;
  font-weight: 800;
}

.setting {
  display: grid;
  gap: 8px;
  margin: 16px 0;
  color: var(--muted);
  font-weight: 800;
}
.setting.checkbox { display: flex; align-items: center; justify-content: space-between; }
input[type="range"] { width: 100%; accent-color: var(--hot); }
input[type="checkbox"] { width: 22px; height: 22px; accent-color: var(--cyan); }

@media (max-width: 390px) {
  .panel { padding: 16px; }
  .summary-grid { grid-template-columns: 1fr; }
  button { padding-left: 11px; padding-right: 11px; }
  .hud { gap: 5px; }
  .hud div { padding: 6px 4px; }
  .hud .hud-perks { display: none; }
}