/* Dusk on a closed highway: violet glass panels, Ano-white type,
   a gold accent taken from the car's visor glass, and cold-gas cyan for thrusters. */
:root {
  --ink: #140d1f;
  --glass: rgba(24, 16, 36, 0.72);
  --glass-edge: rgba(255, 236, 214, 0.14);
  --text: #f4efe8;
  --muted: rgba(244, 239, 232, 0.62);
  --gold: #e8c77e;
  --gold-deep: #b98f3e;
  --alert: #ff5a3c;
  --ok: #6fe3a8;
  --cyan: #9fe3ff;
  --sans:
    -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei',
    'Noto Sans SC', 'Segoe UI', sans-serif;
  --num: 'DIN Alternate', 'Bahnschrift', 'SF Mono', ui-monospace, Menlo, monospace;
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--ink);
  color: var(--text);
  font: 14px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  overscroll-behavior: none;
  touch-action: none;
}

#app {
  position: fixed;
  inset: 0;
}

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

.hidden {
  display: none !important;
}

.num {
  font-family: var(--num);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- loading ---------- */
#loading {
  position: fixed;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 14px;
  background: radial-gradient(120% 80% at 50% 100%, #3a1d3e 0%, var(--ink) 60%);
  z-index: 50;
  transition: opacity 0.6s ease;
}

#loading.done {
  opacity: 0;
  pointer-events: none;
}

#loading p {
  margin: 0;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.08em;
}

.loading__bar {
  width: 180px;
  height: 2px;
  background: rgba(255, 255, 255, 0.12);
  overflow: hidden;
}

.loading__bar span {
  display: block;
  width: 40%;
  height: 100%;
  background: var(--gold);
  animation: load 1.1s ease-in-out infinite;
}

@keyframes load {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(260%);
  }
}

/* ---------- HUD ---------- */
#hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10;
}

.hud-chip {
  position: absolute;
  top: calc(14px + var(--safe-t));
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 12px;
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  border-radius: 10px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  min-width: 108px;
}

.hud-chip--left {
  left: calc(14px + var(--safe-l));
}

.hud-chip--right {
  right: calc(14px + var(--safe-r));
  text-align: right;
}

.hud-chip__label {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.hud-chip__value {
  font-size: 22px;
  line-height: 1.1;
}

.hud-chip--right.near .hud-chip__value {
  color: var(--gold);
}

.hud-chip--right.cleared .hud-chip__value {
  color: var(--cyan);
}

/* pedal force gauge */
.force {
  position: absolute;
  left: calc(18px + var(--safe-l));
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.force__label {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
  writing-mode: horizontal-tb;
}

.force__track {
  position: relative;
  width: 14px;
  height: min(34vh, 260px);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--glass-edge);
  border-radius: 8px;
  overflow: visible;
}

.force__fill {
  position: absolute;
  left: 1px;
  right: 1px;
  bottom: 1px;
  height: 0;
  border-radius: 6px;
  background: linear-gradient(to top, var(--gold-deep), var(--gold) 70%, #fff4d6);
  transition: background 0.2s;
}

.force.danger .force__fill {
  background: linear-gradient(to top, #c9361f, var(--alert) 70%, #ffd2c4);
  box-shadow: 0 0 18px rgba(255, 90, 60, 0.55);
}

.force__limit {
  position: absolute;
  left: -5px;
  right: -5px;
  top: 6%;
  border-top: 2px dashed var(--alert);
}

.force__limit span {
  position: absolute;
  left: 22px;
  top: -9px;
  font-size: 11px;
  color: var(--alert);
}

.force__value {
  font-size: 13px;
  min-width: 56px;
  text-align: center;
}

/* flip counter */
.flips {
  position: absolute;
  top: calc(84px + var(--safe-t));
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(159, 227, 255, 0.14);
  border: 1px solid rgba(159, 227, 255, 0.4);
  color: var(--cyan);
  font-size: 12px;
}

.flips .num {
  font-size: 16px;
}

/* speedometer */
.speedo {
  position: absolute;
  left: 50%;
  bottom: calc(14px + var(--safe-b));
  width: min(240px, calc(100vw - 236px - var(--safe-l) - var(--safe-r)));
  transform: translateX(-50%);
}

.speedo svg {
  display: block;
  width: 100%;
  overflow: visible;
}

.speedo__track,
.speedo__arc {
  fill: none;
  stroke-width: 9;
  stroke-linecap: round;
}

.speedo__track {
  stroke: rgba(255, 255, 255, 0.12);
}

.speedo__arc {
  stroke: rgba(244, 239, 232, 0.55);
  transition: stroke 0.25s;
}

.speedo__arc.ready {
  stroke: var(--gold);
  filter: drop-shadow(0 0 6px rgba(232, 199, 126, 0.6));
}

.speedo__mark {
  stroke: var(--alert);
  stroke-width: 2.5;
}

.speedo__readout {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1;
}

.speedo__readout .num {
  font-size: clamp(34px, 9vw, 48px);
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.5);
}

.speedo__unit {
  margin-top: 4px;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.12em;
}

.speedo__readout .speedo__mph {
  margin-top: 3px;
  font-size: 12px;
  color: var(--cyan);
  text-shadow: none;
}

/* jet button: the ring fills as the jets push you towards 383 mph */
.jet-btn {
  --gas: 1;
  position: absolute;
  left: calc(18px + var(--safe-l));
  bottom: calc(22px + var(--safe-b));
  width: 92px;
  height: 92px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: conic-gradient(var(--cyan) calc(var(--gas) * 360deg), rgba(255, 255, 255, 0.1) 0);
  color: var(--muted);
  pointer-events: auto;
  touch-action: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  transition:
    transform 0.08s,
    box-shadow 0.2s,
    color 0.2s;
}

.jet-btn::before {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background 0.15s;
}

.jet-btn > span {
  position: relative;
}

.jet-btn__label {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.jet-btn__gas {
  font-size: 11px;
  opacity: 0.8;
}

.jet-btn.ready {
  color: #fff;
  box-shadow: 0 0 22px rgba(159, 227, 255, 0.3);
}

.jet-btn.firing {
  transform: scale(0.93);
  box-shadow: 0 0 36px rgba(120, 160, 255, 0.85);
}

.jet-btn.firing::before {
  background: rgba(52, 78, 190, 0.7);
}

.jet-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

/* brake button */
.brake-btn {
  position: absolute;
  right: calc(18px + var(--safe-r));
  bottom: calc(22px + var(--safe-b));
  width: 92px;
  height: 92px;
  border-radius: 50%;
  border: 1px solid var(--glass-edge);
  background: var(--glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
  pointer-events: auto;
  touch-action: none;
  display: grid;
  place-items: center;
  transition:
    transform 0.08s,
    background 0.2s,
    color 0.2s;
}

.brake-btn__ring {
  position: absolute;
  inset: 7px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.12);
}

.brake-btn.ready {
  color: #fff;
  background: rgba(214, 52, 34, 0.82);
  border-color: rgba(255, 140, 120, 0.6);
  box-shadow: 0 0 28px rgba(255, 90, 60, 0.45);
}

.brake-btn.ready .brake-btn__ring {
  border-color: rgba(255, 255, 255, 0.45);
}

.brake-btn.pressed {
  transform: scale(0.93);
  background: rgba(170, 30, 18, 0.95);
}

.brake-btn:disabled {
  cursor: default;
}

.countdown {
  position: absolute;
  left: 50%;
  top: 36%;
  transform: translate(-50%, -50%);
  font: 800 clamp(72px, 18vw, 140px) / 1 var(--num);
  color: var(--text);
  text-shadow: 0 6px 40px rgba(0, 0, 0, 0.5);
  animation: pop 0.7s ease-out both;
}

@keyframes pop {
  from {
    transform: translate(-50%, -50%) scale(1.6);
    opacity: 0;
  }
  30% {
    opacity: 1;
  }
  to {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
  }
}

.toast {
  position: absolute;
  left: 50%;
  top: calc(122px + var(--safe-t));
  transform: translateX(-50%);
  max-width: calc(100vw - 32px);
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  animation: toast-in 0.25s ease-out;
}

.toast.alert {
  border-color: rgba(255, 90, 60, 0.6);
  color: #ffd9cf;
}

.toast.air {
  border-color: rgba(159, 227, 255, 0.55);
  color: var(--cyan);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translate(-50%, -6px);
  }
}

/* ---------- panels ---------- */
.panel {
  position: fixed;
  z-index: 20;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(440px, calc(100vw - 32px - var(--safe-l) - var(--safe-r)));
  max-height: calc(100% - 32px - var(--safe-t) - var(--safe-b));
  overflow-y: auto;
  overscroll-behavior: contain;
  touch-action: pan-y;
  padding: 24px 24px 18px;
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  border-radius: 18px;
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
  animation: panel-in 0.35s ease-out;
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translate(-50%, -46%);
  }
}

.back {
  position: absolute;
  top: 14px;
  left: 18px;
  color: var(--muted);
  font-size: 12px;
  text-decoration: none;
}

.back:hover {
  color: var(--text);
}

.eyebrow {
  margin: 14px 0 6px;
  font: 600 11px/1 var(--num);
  letter-spacing: 0.3em;
  color: var(--gold);
  text-align: center;
}

h1 {
  margin: 0;
  font-size: clamp(28px, 7vw, 36px);
  font-weight: 800;
  letter-spacing: 0.06em;
  text-align: center;
  text-wrap: balance;
}

.tagline {
  margin: 8px auto 16px;
  max-width: 30em;
  color: var(--muted);
  text-align: center;
  text-wrap: balance;
}

.specs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 0 0 16px;
  border-radius: 12px;
  overflow: hidden;
  background: var(--glass-edge);
}

.specs > div {
  padding: 8px 4px;
  background: rgba(20, 13, 31, 0.8);
  text-align: center;
}

.specs dt {
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.specs dd {
  margin: 2px 0 0;
  font-size: 15px;
  color: var(--text);
}

.rules {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
  counter-reset: r;
  font-size: 13px;
  color: rgba(244, 239, 232, 0.85);
}

.rules li {
  counter-increment: r;
  position: relative;
  padding-left: 28px;
}

.rules li::before {
  content: counter(r);
  position: absolute;
  left: 0;
  top: 0;
  font: 600 11px/18px var(--num);
  color: var(--gold);
  text-align: center;
  border: 1px solid rgba(232, 199, 126, 0.35);
  border-radius: 50%;
  width: 20px;
  height: 20px;
}

.rules b {
  color: var(--text);
  font-weight: 600;
}

.rules .hot {
  color: var(--alert);
}

.rules .cool {
  color: var(--cyan);
}

.primary {
  display: block;
  width: 100%;
  padding: 14px;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(180deg, #f6e2b0, var(--gold) 55%, var(--gold-deep));
  color: #1b1208;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.12em;
  box-shadow: 0 8px 24px rgba(232, 199, 126, 0.25);
  transition:
    transform 0.1s,
    filter 0.2s;
}

.primary:hover {
  filter: brightness(1.06);
}

.primary:active {
  transform: scale(0.98);
}

.best {
  margin: 10px 0 0;
  min-height: 1.5em;
  text-align: center;
  color: var(--gold);
  font-size: 13px;
}

.menu-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.ghost {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--glass-edge);
  background: transparent;
  color: var(--muted);
  font-size: 12px;
}

.ghost:hover {
  color: var(--text);
}

.ghost--small {
  padding: 4px 10px;
}

.lang {
  display: inline-flex;
  border: 1px solid var(--glass-edge);
  border-radius: 8px;
  overflow: hidden;
}

.lang button {
  padding: 5px 11px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
}

.lang button[aria-pressed='true'] {
  background: rgba(232, 199, 126, 0.16);
  color: var(--gold);
}

.hint {
  margin: 10px 0 0;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}

.foot {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--glass-edge);
}

.foot--result {
  align-items: center;
}

.footnote {
  margin: 0;
  font-size: 10.5px;
  line-height: 1.5;
  color: rgba(244, 239, 232, 0.45);
}

/* the tip link stays quiet on purpose */
.tip {
  flex: none;
  border: 0;
  background: none;
  padding: 2px 0;
  font-size: 11px;
  color: rgba(244, 239, 232, 0.45);
  white-space: nowrap;
}

.tip:hover {
  color: var(--gold);
}

/* ---------- result ---------- */
.panel--result h2 {
  margin: 0;
  text-align: center;
  font-size: 26px;
  letter-spacing: 0.06em;
}

.panel--result h2.ok {
  color: var(--ok);
}

.panel--result h2.air {
  color: var(--cyan);
}

.result-sub {
  margin: 4px 0 14px;
  text-align: center;
  color: var(--muted);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.stats > div {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  min-width: 0;
}

.stats span {
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.stats b {
  font-size: 16px;
  font-weight: 600;
  white-space: nowrap;
}

.chart {
  margin-top: 10px;
  padding: 8px 10px 6px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
}

.chart__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 10px;
  font-size: 11px;
  color: var(--muted);
}

.chart__head > span:first-child {
  color: var(--text);
  font-weight: 600;
}

.chart__legend {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.lg {
  display: inline-block;
  width: 10px;
  height: 3px;
  border-radius: 2px;
  margin-left: 6px;
}

.lg--speed {
  background: #f4efe8;
}

.lg--force {
  background: var(--gold);
}

.lg--air {
  height: 8px;
  background: rgba(159, 227, 255, 0.35);
}

#chart {
  display: block;
  width: 100%;
  height: 130px;
  margin-top: 6px;
}

.score {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 12px 0 14px;
  color: var(--muted);
  font-size: 12px;
}

.score b {
  font-size: 46px;
  line-height: 1.1;
  color: var(--gold);
}

.score__best {
  min-height: 1.4em;
}

.score__best.new {
  color: var(--ok);
}

/* ---------- donation ---------- */
.donate {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(8, 5, 14, 0.66);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: fade 0.2s ease-out;
}

@keyframes fade {
  from {
    opacity: 0;
  }
}

.donate__card {
  width: min(500px, 100%);
  max-height: 100%;
  overflow-y: auto;
  padding: 20px;
  border-radius: 16px;
  background: #1c1329;
  border: 1px solid var(--glass-edge);
  text-align: center;
  touch-action: pan-y;
}

.donate__card h3 {
  margin: 0;
  font-size: 18px;
}

.donate__card p {
  margin: 4px 0 14px;
  color: var(--muted);
  font-size: 13px;
}

.donate__codes {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 14px;
}

.donate__codes figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.donate__codes img {
  width: 190px;
  height: auto;
  border-radius: 10px;
  background: #fff;
  user-select: auto;
  -webkit-user-select: auto;
  -webkit-touch-callout: default;
}

.donate__codes figcaption {
  font-size: 12px;
  color: var(--muted);
}

@media (max-width: 480px) {
  .panel {
    padding: 20px 16px 14px;
  }
  .specs dd {
    font-size: 13px;
  }
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .hud-chip {
    min-width: 92px;
    padding: 6px 10px;
  }
  .hud-chip__value {
    font-size: 18px;
  }
  .brake-btn,
  .jet-btn {
    width: 80px;
    height: 80px;
  }
  .donate__codes img {
    width: 150px;
  }
}

@media (max-height: 520px) and (orientation: landscape) {
  .force__track {
    height: 40vh;
  }
  .panel {
    top: calc(50% + (var(--safe-t) - var(--safe-b)) / 2);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}