:root {
  color-scheme: dark;
  --bg: #07080d;
  --ink: #e7eef6;
  --muted: #9aa8b8;
  --cyan: #BFF3FF;
  --amber: #FFC233;
  --danger: #FF3B30;
  --panel: rgba(8, 10, 16, 0.78);
  --line: rgba(255, 255, 255, 0.12);
  font-family: "Segoe UI", "Avenir Next", "Liberation Sans", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  height: 100dvh;
  background: var(--bg);
  color: var(--ink);
  overflow: hidden;
  touch-action: none;
  overscroll-behavior: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

#frame {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: #000;
  overflow: hidden;
  container-type: inline-size;
  touch-action: none;
}

#frame:focus { outline: none; }

canvas {
  display: block;
  width: 100%;
  height: 100%;
  background: #081018;
}

[hidden] { display: none !important; }

.num { font-variant-numeric: tabular-nums; }

.k {
  letter-spacing: 0.16em;
  font-size: 0.72em;
  color: var(--muted);
  font-weight: 700;
}

#hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 3;
  padding: calc(10px + env(safe-area-inset-top)) calc(14px + env(safe-area-inset-right)) 3cqi calc(14px + env(safe-area-inset-left));
  display: flex;
  flex-direction: column;
  gap: 0.8cqi;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(4, 6, 12, 0.78), rgba(4, 6, 12, 0));
}

#frame[data-state="menu"] #hud,
#frame[data-state="over"] #hud {
  opacity: 0;
  visibility: hidden;
}

.hud-row, .charge-row {
  display: flex;
  align-items: center;
  gap: 1.4cqi;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.18em;
  font-size: 1.7cqi;
}

.dist {
  font-size: 3.4cqi;
  font-weight: 750;
  letter-spacing: 0.02em;
}

.dist .k, .best .k { margin-right: 0.4cqi; }

.spacer { flex: 1; }

.best {
  color: var(--muted);
  font-size: 1.7cqi;
}

#boost {
  position: relative;
  min-width: 9cqi;
  text-align: center;
  letter-spacing: 0.16em;
  font-size: 1.3cqi;
  font-weight: 800;
  padding: 0.55cqi 0.9cqi 0.7cqi;
  border: 1px solid var(--line);
  color: rgba(255, 255, 255, 0.4);
  background: rgba(0, 0, 0, 0.25);
}

#boost.ready {
  color: #e9fdff;
  border-color: rgba(126, 246, 255, 0.75);
  box-shadow: 0 0 12px rgba(80, 230, 255, 0.25);
}

#boost.active {
  color: #1c1408;
  background: #ffc56b;
  border-color: #ffc56b;
}

#boost.wait::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: calc(var(--p, 0) * 100%);
  background: var(--cyan);
}

.charge-row { max-width: 46cqi; }

.charge-track {
  flex: 1;
  height: 1.8cqi;
  min-height: 16px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(126, 246, 255, 0.35);
  border-radius: 99px;
  overflow: hidden;
}

#charge-fill {
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, #14c8a5, #8ef6ff);
  box-shadow: 0 0 12px rgba(80, 255, 230, 0.45);
}

#charge-pct {
  min-width: 5cqi;
  font-weight: 700;
  font-size: 1.6cqi;
}

#hud.low #charge-fill {
  background: linear-gradient(90deg, #ff4d3a, #ffb020);
  animation: pulse 0.7s ease-in-out infinite;
}

#hud.hit #charge-fill {
  filter: brightness(1.6);
}

#coach {
  margin: 0;
  color: var(--muted);
  letter-spacing: 0.08em;
  font-size: 1.45cqi;
}

#screen-start, #screen-over {
  position: absolute;
  inset: 0;
  z-index: 2;
}

#screen-start {
  display: flex;
  align-items: center;
  padding: 6% 7%;
  background: linear-gradient(90deg, rgba(6, 8, 14, 0.9) 0%, rgba(6, 8, 14, 0.72) 38%, rgba(6, 8, 14, 0.18) 68%, rgba(6, 8, 14, 0.02) 100%);
}

.start-copy { width: min(46cqi, 520px); }

.eyebrow {
  margin: 0 0 0.4cqi;
  letter-spacing: 0.22em;
  color: var(--cyan);
  font-size: 1.4cqi;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(40px, 8cqi, 84px);
  letter-spacing: 0.14em;
  line-height: 0.95;
  font-weight: 800;
}

.pitch {
  margin: 1.4cqi 0 2cqi;
  color: var(--muted);
  font-size: 1.8cqi;
  max-width: 36ch;
}

button {
  appearance: none;
  border: 1px solid rgba(126, 246, 255, 0.7);
  background: #102028;
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.9cqi 1.8cqi;
  min-height: 52px;
  min-width: 120px;
  cursor: pointer;
  touch-action: manipulation;
}

button:hover, button:focus-visible {
  background: #18323c;
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

#retry-btn { width: 100%; }

.key {
  margin: 0.7cqi 0 1.6cqi;
  color: var(--muted);
  letter-spacing: 0.12em;
  font-size: 1.35cqi;
}

dl {
  display: grid;
  grid-template-columns: 8.5cqi 1fr;
  gap: 0.45cqi 1cqi;
  margin: 0 0 1.6cqi;
  font-size: 1.5cqi;
}

dt { color: var(--cyan); font-weight: 700; }
dd { margin: 0; color: var(--ink); }

.rules {
  list-style: none;
  padding: 0;
  margin: 0 0 1.6cqi;
  display: grid;
  gap: 0.45cqi;
  font-size: 1.45cqi;
}

.rules li { display: flex; align-items: center; gap: 0.7cqi; }

.swatch {
  width: 0.85cqi;
  height: 0.85cqi;
  min-width: 8px;
  min-height: 8px;
  display: inline-block;
  box-shadow: 0 0 8px currentColor;
}

.swatch.cyan { background: var(--cyan); color: var(--cyan); }
.swatch.ice { background: var(--cyan); color: var(--cyan); }
.swatch.white { background: #F2F4F7; color: #F2F4F7; }
.swatch.amber { background: var(--amber); color: var(--amber); }
.swatch.red { background: var(--danger); color: var(--danger); }

.best-line {
  margin: 0;
  color: var(--muted);
  letter-spacing: 0.08em;
  font-size: 1.5cqi;
}

#screen-over {
  display: grid;
  place-items: center;
  background: rgba(4, 6, 12, 0.42);
}

.card {
  width: min(42cqi, 440px);
  padding: 3.2cqi 3cqi 2.4cqi;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  text-align: left;
}

#over-reason {
  margin: 0;
  font-size: clamp(22px, 3.1cqi, 36px);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

#over-reason[data-kind="crash"] { color: var(--danger); }
#over-reason[data-kind="battery"] { color: #ffbf70; }

#over-detail {
  margin: 0.8cqi 0 1.4cqi;
  color: var(--muted);
  font-size: 1.6cqi;
}

.big {
  margin: 0;
  font-size: clamp(36px, 6cqi, 68px);
  font-weight: 800;
  letter-spacing: 0.03em;
}

#over-new {
  margin: 0.6cqi 0 1.2cqi;
  color: var(--cyan);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 800;
  font-size: 1.4cqi;
}

#mute {
  position: absolute;
  left: calc(12px + env(safe-area-inset-left));
  bottom: calc(12px + env(safe-area-inset-bottom));
  z-index: 5;
  min-width: 64px;
  min-height: 44px;
  padding: 0.45cqi 0.8cqi;
  font-size: 1.2cqi;
  letter-spacing: 0.12em;
  background: rgba(8, 10, 16, 0.7);
}

#rotate-gate {
  display: none;
}

@media (orientation: portrait) {
  #rotate-gate {
    display: flex;
    position: fixed;
    inset: 0;
    z-index: 40;
    align-items: center;
    justify-content: center;
    background: #07080d;
    color: #e7eef6;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-weight: 800;
  }
}

@keyframes pulse {
  50% { filter: brightness(1.35); }
}