:root {
  color-scheme: dark;
  --bg: #090b12;
  --ink: #f8fbff;
  --muted: #a9b3c7;
  --panel: rgba(16, 23, 38, 0.84);
  --line: rgba(255, 255, 255, 0.13);
  --road: #252b35;
  --yellow: #ffd447;
  --red: #ff4d5a;
  --cyan: #5be7ff;
  --green: #86ff72;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Inter, ui-rounded, "SF Pro Rounded", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 10%, rgba(91, 231, 255, 0.18), transparent 22rem),
    radial-gradient(circle at 90% 80%, rgba(255, 77, 90, 0.15), transparent 24rem),
    var(--bg);
  overscroll-behavior: none;
}

button,
a {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

.game-shell {
  display: grid;
  width: min(100%, 470px);
  min-height: 100dvh;
  margin: 0 auto;
  padding: max(14px, env(safe-area-inset-top)) 14px max(18px, env(safe-area-inset-bottom));
  gap: 12px;
}

.topbar {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 8px;
}

.back-link,
.status-pill {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.24);
}

.back-link {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  padding: 0 13px;
  color: #d9e3f3;
  font-size: 0.85rem;
  font-weight: 800;
  text-decoration: none;
}

.status-pill {
  min-width: 78px;
  padding: 8px 10px;
  text-align: center;
}

.status-pill span {
  display: block;
  color: var(--muted);
  font-size: 0.62rem;
  font-weight: 850;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.status-pill b {
  display: block;
  margin-top: 2px;
  color: var(--green);
  font-size: 1rem;
}

.stage-card {
  position: relative;
  min-height: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 30px;
  background: #111722;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.44);
  touch-action: none;
}

canvas {
  display: block;
  width: 100%;
  height: min(72dvh, 760px);
  min-height: 540px;
  background: var(--road);
}

.overlay {
  position: absolute;
  inset: 18px;
  display: grid;
  place-content: center;
  justify-items: center;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(10, 14, 23, 0.84), rgba(10, 14, 23, 0.68)),
    radial-gradient(circle at 50% 25%, rgba(91, 231, 255, 0.22), transparent 15rem);
  text-align: center;
  backdrop-filter: blur(10px);
}

.overlay.hidden {
  display: none;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--yellow);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: -0.06em;
}

h1 {
  font-size: clamp(3.2rem, 15vw, 5.5rem);
  line-height: 0.9;
}

h2 {
  font-size: clamp(2.3rem, 11vw, 3.8rem);
}

.overlay p:not(.eyebrow) {
  max-width: 310px;
  margin: 18px 0 24px;
  color: #c7d2e5;
  line-height: 1.55;
}

.overlay button,
.controls button {
  border-radius: 18px;
  color: #070a10;
  background: linear-gradient(135deg, var(--yellow), #ff9b38);
  font-weight: 950;
  box-shadow: 0 14px 28px rgba(255, 180, 50, 0.28);
}

.overlay button {
  min-width: 164px;
  padding: 15px 20px;
}

.controls {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 10px;
}

.controls button {
  min-height: 58px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 1.9rem;
}

#pauseButton {
  min-width: 94px;
  color: #d9e3f3;
  background: rgba(255, 255, 255, 0.09);
  box-shadow: none;
  font-size: 0.86rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.hint {
  margin: 0;
  color: #7f8da4;
  font-size: 0.76rem;
  text-align: center;
}

@media (max-height: 690px) {
  canvas {
    height: 66dvh;
    min-height: 420px;
  }

  .controls button {
    min-height: 50px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}