/* Dirt Dash — original endless physics bike game for HappyBiu. */

:root {
  color-scheme: light;
  --dd-bg: #eef0e4;
  --dd-bg-deep: #d9ddc8;
  --dd-surface: #fffdf4;
  --dd-surface-2: #e7e9da;
  --dd-ink: #22261d;
  --dd-muted: #616654;
  --dd-line: #22261d;
  --dd-accent: #5b8c3a;
  --dd-accent-2: #d08a2c;
  --dd-score: #4f7c32;
  --dd-gold: #7a4b00;
  --dd-danger: #c2543d;
  --dd-mint: #3f8a4d;
  --dd-shadow: #22261d;
  --dd-on-accent: #ffffff;
  --dd-on-gold: #141226;
  --dd-scrim: rgba(34, 38, 29, 0.56);
  --dd-sky: #dce8f2;
  --dd-hill: #b6c5ac;
  --dd-hill-2: #93a88c;
  --dd-dirt: #b97b48;
  --dd-dirt-dark: #7d4f2e;
  --dd-grass: #5b8c3a;
  --dd-grass-dark: #3e6427;
  --dd-coin: #e0a020;
  --dd-rock: #7b857a;
  --dd-rock-dark: #4f5b52;
  --dd-log: #8c5a35;
  --dd-log-dark: #5c3a22;
  --dd-font: ui-monospace, "SFMono-Regular", "Cascadia Mono", "Segoe UI Mono",
    Menlo, Consolas, monospace;
}

[data-theme="dark"] {
  color-scheme: dark;
  --dd-bg: #0d1410;
  --dd-bg-deep: #1a2418;
  --dd-surface: #172117;
  --dd-surface-2: #243225;
  --dd-ink: #f1f5e8;
  --dd-muted: #a8b29d;
  --dd-line: #f1f5e8;
  --dd-accent: #8ccf5a;
  --dd-accent-2: #ffb85c;
  --dd-score: #ffcf5a;
  --dd-gold: #ffcf5a;
  --dd-danger: #ff6b57;
  --dd-mint: #77c78c;
  --dd-shadow: #020805;
  --dd-on-accent: #08100b;
  --dd-on-gold: #141226;
  --dd-scrim: rgba(2, 8, 5, 0.72);
  --dd-sky: #0b1220;
  --dd-hill: #1a2a24;
  --dd-hill-2: #24382b;
  --dd-dirt: #6f4b32;
  --dd-dirt-dark: #4a3020;
  --dd-grass: #5f9c45;
  --dd-grass-dark: #3c6b2f;
  --dd-coin: #ffcf5a;
  --dd-rock: #5f6b64;
  --dd-rock-dark: #39443d;
  --dd-log: #735034;
  --dd-log-dark: #4a3020;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--dd-bg);
}

body {
  font-family: var(--dd-font);
  color: var(--dd-ink);
  font-size: 16px;
  line-height: 1.4;
  -webkit-font-smoothing: none;
  text-rendering: optimizeSpeed;
  touch-action: none;
  overscroll-behavior: none;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  touch-action: manipulation;
}

.u-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#app {
  position: relative;
  isolation: isolate;
  width: 100%;
  height: 100%;
  height: 100dvh;
  overflow: hidden;
  background: var(--dd-bg);
}

.dd-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-color: var(--dd-bg);
  background-image: url("./assets/dirt-dash-light.png");
  background-position: center;
  background-size: cover;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: pixelated;
  opacity: 0.2;
}

[data-theme="dark"] .dd-bg {
  background-image: url("./assets/dirt-dash-dark.png");
  opacity: 0.3;
}

#game-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: pixelated;
  outline: none;
  touch-action: none;
}

#game-canvas:focus-visible {
  outline: 3px solid var(--dd-accent-2);
  outline-offset: -3px;
}

/* HUD --------------------------------------------------------------------- */

.dd-hud {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 4px 8px;
  padding: calc(8px + env(safe-area-inset-top, 0px))
    calc(8px + env(safe-area-inset-right, 0px)) 0
    calc(8px + env(safe-area-inset-left, 0px));
  pointer-events: none;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.dd-hud__group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.dd-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 24px;
  padding: 3px 5px;
  border: 2px solid var(--dd-line);
  background: var(--dd-surface);
  box-shadow: 3px 3px 0 var(--dd-shadow);
  white-space: nowrap;
}

.dd-chip strong {
  color: var(--dd-accent);
  font-size: 13px;
}

.dd-chip--accent strong {
  color: var(--dd-score);
}

.dd-icon-btn {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 3px solid var(--dd-line);
  border-radius: 0;
  background: var(--dd-surface);
  box-shadow: 4px 4px 0 var(--dd-shadow);
  pointer-events: auto;
}

.dd-icon-btn:active {
  transform: translate(3px, 3px);
  box-shadow: 0 0 0 0 var(--dd-shadow);
}

.dd-icon-btn__bars {
  display: inline-grid;
  grid-template-columns: repeat(2, 6px);
  gap: 4px;
}

.dd-icon-btn__bars span {
  display: block;
  width: 6px;
  height: 16px;
  background: currentColor;
}

.dd-icon-btn[aria-pressed="true"] .dd-icon-btn__bars span {
  width: 6px;
  height: 12px;
  align-self: center;
}

.dd-icon-btn[aria-pressed="true"] .dd-icon-btn__bars span:first-child {
  clip-path: polygon(0 0, 100% 50%, 100% 50%, 0 100%);
}

/* Start card -------------------------------------------------------------- */

.dd-start {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: grid;
  place-items: center;
  padding: 20px;
  pointer-events: none;
}

.dd-start[hidden] {
  display: none;
}

.dd-start__card {
  width: min(86vw, 350px);
  padding: 18px;
  border: 3px solid var(--dd-line);
  background: var(--dd-surface);
  box-shadow: 6px 6px 0 var(--dd-accent);
  text-align: center;
  pointer-events: auto;
}

.dd-start__card h1 {
  margin: 0 0 6px;
  color: var(--dd-accent);
  font-size: 24px;
  line-height: 1.1;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.dd-start__card p {
  margin: 0 0 8px;
  color: var(--dd-muted);
  font-size: 16px;
  line-height: 1.45;
}

.dd-start__card .dd-start__seed {
  color: var(--dd-accent);
}

.dd-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 48px;
  padding: 8px 12px;
  border: 3px solid var(--dd-line);
  border-radius: 0;
  background: var(--dd-surface);
  box-shadow: 4px 4px 0 var(--dd-shadow);
  font-family: var(--dd-font);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.dd-btn--primary {
  color: var(--dd-on-accent);
  background: var(--dd-accent);
}

.dd-btn:active {
  transform: translate(3px, 3px);
  box-shadow: 0 0 0 0 var(--dd-shadow);
}

/* Touch controls ---------------------------------------------------------- */

.dd-touch {
  position: absolute;
  right: calc(10px + env(safe-area-inset-right, 0px));
  bottom: calc(10px + env(safe-area-inset-bottom, 0px));
  left: calc(10px + env(safe-area-inset-left, 0px));
  z-index: 3;
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  pointer-events: none;
}

.dd-lean {
  display: flex;
  align-items: center;
  gap: 8px;
}

.dd-drive {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.dd-action--jump {
  width: 100%;
  min-height: 56px;
  color: var(--dd-on-gold);
  background: var(--dd-accent-2);
}

.dd-action {
  display: grid;
  place-items: center;
  min-width: 64px;
  min-height: 64px;
  padding: 0 8px;
  border: 3px solid var(--dd-line);
  border-radius: 0;
  color: var(--dd-on-accent);
  background: var(--dd-accent);
  box-shadow: 4px 4px 0 var(--dd-shadow);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  pointer-events: auto;
}

.dd-action--brake {
  color: var(--dd-ink);
  background: var(--dd-surface);
}

.dd-action--lean {
  min-width: 48px;
  min-height: 48px;
  padding: 0 4px;
  color: var(--dd-on-gold);
  background: var(--dd-accent-2);
  font-size: 12px;
}

.dd-action:active {
  transform: translate(3px, 3px);
  box-shadow: 0 0 0 0 var(--dd-shadow);
}

@media (max-width: 720px), (hover: none), (pointer: coarse),
  (orientation: landscape) and (max-height: 520px) and (max-width: 850px) {
  .dd-touch {
    display: flex;
  }
}

#app[data-state="ready"] .dd-touch,
#app[data-state="over"] .dd-touch {
  display: none;
}

@media (max-width: 520px) {
  .dd-hud {
    flex-direction: column;
    align-items: stretch;
  }

  .dd-hud__group {
    justify-content: space-between;
  }
}

@media (max-width: 360px) {
  .dd-chip {
    padding: 2px 4px;
  }

  .dd-action {
    min-width: 60px;
    min-height: 60px;
  }

  .dd-action--lean {
    min-width: 48px;
    min-height: 48px;
  }
}

/* Reduced motion ---------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .dd-btn,
  .dd-action,
  .dd-icon-btn {
    transition: none;
  }
}