:root {
  color-scheme: dark;
  --bg: #060814;
  --panel: rgba(10, 16, 33, 0.82);
  --panel-border: rgba(123, 255, 235, 0.18);
  --text: #eef4ff;
  --muted: #99abc9;
  --accent: #75f7df;
  --accent-strong: #2bf0c6;
  --danger: #ff5b89;
  --shadow: 0 30px 70px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(65, 111, 255, 0.2), transparent 34%),
    radial-gradient(circle at bottom left, rgba(43, 240, 198, 0.12), transparent 28%),
    linear-gradient(180deg, #090f22 0%, var(--bg) 62%, #05070f 100%);
  color: var(--text);
  overscroll-behavior: none;
}

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 16px;
  padding: 20px;
}

.hud,
.footer,
.mobile-controls {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.hud {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.stat,
.footer,
.overlay {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.stat {
  border-radius: 18px;
  padding: 16px 18px;
}

.label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 8px;
}

.value {
  display: block;
  font-size: clamp(1.2rem, 2vw, 1.8rem);
  font-weight: 700;
  color: var(--accent);
}

.stage {
  width: min(1120px, 100%);
  margin: 0 auto;
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  min-height: clamp(420px, 70vh, 760px);
  border: 1px solid rgba(117, 247, 223, 0.14);
  box-shadow: var(--shadow);
  touch-action: none;
}

#gameCanvas {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, #0b1630 0%, #070b18 75%, #05070d 100%);
  touch-action: none;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: center;
  justify-items: center;
  text-align: center;
  padding: 32px;
  gap: 16px;
}

.overlay.hidden {
  display: none;
}

.overlay.visible {
  display: grid;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  font-size: clamp(2.2rem, 6vw, 4.75rem);
  line-height: 0.94;
}

.copy {
  margin: 0;
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  line-height: 1.65;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  color: var(--muted);
  font-size: 0.95rem;
}

.button {
  border: 0;
  border-radius: 999px;
  padding: 14px 28px;
  font: inherit;
  font-weight: 700;
  color: #00120e;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  cursor: pointer;
  box-shadow: 0 14px 28px rgba(43, 240, 198, 0.24);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-danger {
  color: white;
  background: linear-gradient(135deg, #ff7a9f, var(--danger));
  box-shadow: 0 14px 28px rgba(255, 91, 137, 0.24);
}

.mobile-controls {
  display: none;
  align-items: stretch;
  gap: 14px;
  padding-bottom: env(safe-area-inset-bottom, 0);
}

.mobile-control-group {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  flex: 1;
}

.mobile-control {
  min-height: 68px;
  border: 1px solid var(--panel-border);
  border-radius: 22px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.mobile-control-boost {
  min-width: min(210px, 38vw);
  color: #00120e;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow: 0 14px 28px rgba(43, 240, 198, 0.24);
}

.mobile-control.active,
.mobile-control:active {
  transform: translateY(1px) scale(0.99);
  border-color: rgba(117, 247, 223, 0.38);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-radius: 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer a {
  color: var(--text);
  text-decoration: none;
}

.footer a:hover,
.footer a:focus-visible {
  color: var(--accent);
}

@media (max-width: 780px) {
  .shell {
    gap: 12px;
    padding: 12px;
  }

  .hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .stat {
    padding: 14px 16px;
  }

  .footer {
    flex-direction: column;
    padding: 14px 16px;
    font-size: 0.88rem;
  }

  .controls {
    flex-direction: column;
  }

  .stage {
    min-height: clamp(360px, 58svh, 620px);
  }

  .overlay {
    padding: 24px 18px;
  }
}

@media (pointer: coarse) {
  .mobile-controls {
    display: flex;
  }

  .stage {
    min-height: clamp(360px, 56svh, 680px);
  }
}