:root {
  --ink: #f9f5e8;
  --muted: #cbd5d8;
  --line: rgba(255, 206, 144, 0.45);
  --panel: rgba(10, 19, 29, 0.84);
  --panel-edge: rgba(129, 190, 207, 0.42);
  --chip: rgba(8, 18, 28, 0.7);
  --accent: #fca85f;
  --accent-2: #65d3e5;
  --warn: #ff6f57;
}

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

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  color: var(--ink);
  font-family: "Avenir Next Condensed", "Franklin Gothic Medium", "Arial Narrow", sans-serif;
  background:
    radial-gradient(circle at 22% 16%, rgba(227, 152, 85, 0.32), transparent 36%),
    radial-gradient(circle at 79% 10%, rgba(90, 165, 183, 0.24), transparent 40%),
    linear-gradient(160deg, #192534 0%, #141b25 38%, #0a1016 100%);
}

#gameCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(160deg, rgba(5, 9, 14, 0.52), rgba(3, 8, 12, 0.76));
  backdrop-filter: blur(3px);
  z-index: 20;
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease;
}

.overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.overlay.hidden {
  display: none;
}

.panel {
  width: min(620px, 94vw);
  border: 1px solid var(--panel-edge);
  clip-path: polygon(0 12px, 12px 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  padding: 24px 26px;
  background: linear-gradient(170deg, var(--panel), rgba(14, 29, 44, 0.88));
  box-shadow: 0 26px 44px rgba(0, 0, 0, 0.45);
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  color: #99afbd;
}

.panel h1 {
  margin: 6px 0 0;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
}

.subtitle {
  margin: 10px 0 16px;
  max-width: 54ch;
  color: var(--muted);
  line-height: 1.38;
}

.controls {
  display: grid;
  gap: 7px;
}

.controls p {
  margin: 0;
  color: #e6edf2;
  font-size: 0.98rem;
}

.selector-wrap {
  margin-top: 12px;
  display: grid;
  gap: 6px;
}

.selector-label {
  font-size: 0.84rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #c8d4de;
}

.selector {
  width: 100%;
  border: 1px solid rgba(171, 219, 233, 0.65);
  border-radius: 9px;
  padding: 9px 10px;
  background: rgba(8, 18, 28, 0.9);
  color: #e6f5ff;
  font: inherit;
}

kbd {
  border: 1px solid rgba(163, 222, 234, 0.65);
  border-bottom-width: 2px;
  border-radius: 7px;
  padding: 2px 8px;
  background: rgba(8, 18, 28, 0.92);
  font-size: 0.9rem;
  color: #def4ff;
}

.start-btn {
  margin-top: 17px;
  border: 1px solid rgba(255, 191, 135, 0.9);
  clip-path: polygon(0 8px, 8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  padding: 12px 18px;
  background: linear-gradient(120deg, var(--accent), #f2be74 44%, #ffe2b2 100%);
  color: #111925;
  font-weight: 800;
  letter-spacing: 0.03em;
  cursor: pointer;
}

.start-btn:hover {
  filter: brightness(1.04);
}

.start-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.hud {
  position: fixed;
  top: 10px;
  left: 10px;
  right: 10px;
  display: grid;
  gap: 7px;
  grid-template-columns: repeat(auto-fit, minmax(122px, 1fr));
  z-index: 10;
}

.hud.hidden {
  display: none;
}

.hud-chip {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 9px;
  background: var(--chip);
  backdrop-filter: blur(2px);
}

.hud-chip span {
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #bfcbd4;
  font-size: 0.7rem;
}

.hud-chip strong {
  display: block;
  margin-top: 2px;
  font-size: 1.02rem;
}

#surfaceValue.offroad {
  color: var(--warn);
}

#chainValue.active {
  color: var(--accent-2);
}

.touch-controls {
  position: fixed;
  left: 10px;
  right: 10px;
  bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
  z-index: 25;
}

.touch-controls.hidden {
  display: none;
}

.touch-pad {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(3, minmax(56px, 78px));
  grid-template-areas:
    ". gas ."
    "left brake right";
}

.touch-btn[data-control="left"] {
  grid-area: left;
}

.touch-btn[data-control="right"] {
  grid-area: right;
}

.touch-btn[data-control="throttle"] {
  grid-area: gas;
}

.touch-btn[data-control="brake"] {
  grid-area: brake;
}

.touch-actions {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(2, minmax(78px, 96px));
}

.touch-btn {
  border: 1px solid rgba(170, 210, 224, 0.75);
  border-radius: 12px;
  padding: 13px 10px;
  background: rgba(7, 17, 26, 0.74);
  color: #eef9ff;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.78rem;
  touch-action: manipulation;
  user-select: none;
}

.touch-btn.action {
  border-color: rgba(255, 198, 128, 0.8);
}

.touch-btn.active {
  background: rgba(101, 211, 229, 0.28);
}

@media (max-width: 820px) {
  .panel {
    padding: 18px 18px 20px;
  }

  .controls p {
    font-size: 0.9rem;
  }

  .hud {
    top: 8px;
    left: 8px;
    right: 8px;
    gap: 6px;
    grid-template-columns: repeat(3, minmax(94px, 1fr));
  }

  .hud-chip {
    padding: 6px 7px;
  }

  .hud-chip span {
    font-size: 0.62rem;
  }

  .hud-chip strong {
    font-size: 0.9rem;
  }
}