:root {
  color-scheme: dark;
  --bg: #0a0d10;
  --panel: #10191d;
  --panel-strong: #16252a;
  --panel-border: #385056;
  --text: #f2f7f4;
  --muted: #9ab0aa;
  --accent: #f2d35b;
  --accent-hot: #ff8a4c;
  --track-green: #2e6a46;
  --shadow: rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    radial-gradient(circle at 18% 10%, rgba(242, 211, 91, 0.14), transparent 28%),
    radial-gradient(circle at 82% 18%, rgba(46, 106, 70, 0.28), transparent 32%),
    linear-gradient(180deg, #12191c 0%, var(--bg) 100%);
  background-size: 32px 32px, 32px 32px, auto, auto, auto;
  color: var(--text);
}

button,
canvas,
.app,
.touch-controls,
.touch-button {
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

input,
textarea {
  -webkit-user-select: text;
  user-select: text;
}

.app {
  min-height: 100vh;
  display: grid;
  grid-template-columns:
    minmax(0, 1fr)
    minmax(0, 560px)
    minmax(0, 1fr);
  align-items: start;
  justify-content: center;
  gap: 24px;
  padding: 28px 24px;
}

.app.config-open {
  grid-template-columns:
    minmax(0, 1fr)
    minmax(0, 560px)
    minmax(220px, 280px)
    minmax(320px, 420px)
    minmax(0, 1fr);
}

.panel {
  grid-column: 2;
  width: min(92vw, 560px);
  padding: 18px;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.045), transparent 34%),
    linear-gradient(180deg, rgba(18, 34, 39, 0.96), rgba(9, 15, 18, 0.98));
  box-shadow: 0 26px 70px var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.leaderboard-panel {
  grid-column: 3;
  width: min(100%, 280px);
  padding: 18px;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 34%),
    linear-gradient(180deg, rgba(17, 29, 34, 0.94), rgba(8, 14, 17, 0.98));
  box-shadow: 0 26px 70px var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.07);
}

.tuning-panel {
  grid-column: 4;
  width: min(92vw, 420px);
  padding: 20px;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 36%),
    linear-gradient(180deg, rgba(17, 29, 34, 0.96), rgba(8, 14, 17, 0.98));
  box-shadow: 0 26px 70px var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.07);
}

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

.hud-card {
  min-height: 62px;
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.055), transparent),
    rgba(0, 0, 0, 0.2);
}

.hud strong,
.label {
  display: block;
}

.hud strong {
  font-variant-numeric: tabular-nums;
  font-size: 1.78rem;
  line-height: 1;
  letter-spacing: 0;
}

#timer.timer-low {
  color: var(--accent-hot);
}

#timer.timer-critical {
  color: #ff6b6b;
}

.label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 4px;
}

.game-shell {
  position: relative;
  border: 1px solid rgba(242, 211, 91, 0.26);
  border-radius: 8px;
  overflow: hidden;
  background: #0f1f14;
  box-shadow:
    0 14px 38px rgba(0, 0, 0, 0.32),
    inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  background: #1b3a27;
  image-rendering: pixelated;
}

.controls-hint {
  margin: 12px 8px 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.4;
  text-align: center;
}

.touch-controls {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: 10px;
  margin-top: 12px;
  touch-action: none;
}

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

.touch-button {
  min-height: 58px;
  border: 1px solid rgba(242, 211, 91, 0.26);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.075), transparent),
    rgba(0, 0, 0, 0.28);
  color: var(--text);
  font: inherit;
  font-size: 1.65rem;
  font-weight: 800;
  line-height: 1;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  touch-action: manipulation;
  -webkit-user-drag: none;
}

.touch-button.brake {
  background: var(--accent);
  color: #102216;
  font-size: 0.92rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.touch-button.is-active {
  transform: translateY(1px);
  filter: brightness(1.16);
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 10px;
  padding: 24px;
  text-align: center;
  background:
    linear-gradient(180deg, rgba(8, 13, 16, 0.76), rgba(8, 13, 16, 0.9)),
    repeating-linear-gradient(
      0deg,
      rgba(255, 255, 255, 0.045) 0,
      rgba(255, 255, 255, 0.045) 1px,
      transparent 1px,
      transparent 4px
    );
}

.overlay[hidden] {
  display: none;
}

.overlay h1 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.45rem);
  letter-spacing: 0;
  text-transform: uppercase;
}

.overlay p {
  margin: 0;
  max-width: 28ch;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.45;
}

.name-form {
  display: grid;
  gap: 8px;
  width: min(100%, 210px);
}

.name-form[hidden] {
  display: none;
}

.name-form label {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.name-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.name-row input,
.name-row button {
  min-width: 0;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  font: inherit;
  font-weight: 700;
}

.name-row input {
  width: 100%;
  padding: 0.74rem 0.8rem;
  background: rgba(0, 0, 0, 0.34);
  color: var(--text);
  text-transform: uppercase;
}

.name-row button {
  cursor: pointer;
  padding: 0.74rem 0.9rem;
  background: var(--accent);
  color: #102216;
  letter-spacing: 0;
}

.leaderboard-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

#player-tag {
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0;
}

.leaderboard-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: leaderboard;
}

.leaderboard-list li {
  counter-increment: leaderboard;
  display: grid;
  grid-template-columns: 2.6ch minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 8px 10px;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.2);
  color: var(--text);
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
}

.leaderboard-list li::before {
  content: counter(leaderboard);
  color: var(--muted);
  font-weight: 700;
}

.leaderboard-list .empty {
  color: var(--muted);
}

.leaderboard-list .empty::before {
  content: "";
}

.leaderboard-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 800;
}

.leaderboard-score {
  color: var(--accent);
  font-weight: 800;
}

.tuning-head {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.tuning-head h2 {
  margin: 0;
  font-size: 1.28rem;
  line-height: 1.15;
}

.tuning-intro {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
  font-size: 0.94rem;
}

.tuning-groups {
  display: grid;
  gap: 12px;
}

.tuning-group {
  border: 1px solid rgba(221, 242, 182, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
  overflow: hidden;
}

.tuning-group summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  font-weight: 700;
}

.tuning-group summary::-webkit-details-marker {
  display: none;
}

.tuning-group summary::after {
  content: "+";
  color: var(--accent);
  font-size: 1.1rem;
}

.tuning-group[open] summary::after {
  content: "−";
}

.tuning-group-body {
  display: grid;
  gap: 12px;
  padding: 0 16px 16px;
}

.tuning-group-copy {
  margin: -4px 0 2px;
  color: var(--muted);
  line-height: 1.4;
  font-size: 0.9rem;
}

.tuning-row {
  display: grid;
  gap: 6px;
}

.tuning-row-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
}

.tuning-row-head label {
  font-weight: 700;
}

.tuning-row-head output {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.tuning-row-copy {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.35;
}

.tuning-row input[type="range"] {
  width: 100%;
  margin: 0;
  accent-color: var(--accent);
}

.telemetry {
  margin-top: 16px;
  padding: 16px;
  border-radius: 8px;
  border: 1px solid rgba(221, 242, 182, 0.14);
  background: rgba(255, 255, 255, 0.03);
}

.telemetry-head {
  margin-bottom: 10px;
}

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

.metric {
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.18);
}

.metric strong,
.metric span {
  display: block;
}

.metric strong {
  color: var(--accent);
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
}

.metric span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.tuning-actions {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.tuning-actions button {
  border: 0;
  border-radius: 8px;
  padding: 0.85rem 1rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 140ms ease, opacity 140ms ease;
}

.tuning-actions button:hover {
  transform: translateY(-1px);
}

.tuning-actions button:active {
  transform: translateY(0);
}

#export-tuning {
  background: var(--accent);
  color: #102216;
}

.tuning-actions .secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.export-block {
  margin-top: 16px;
}

.export-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

#export-status {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
}

#tuning-export {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  border: 1px solid rgba(221, 242, 182, 0.14);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.2);
  color: var(--text);
  padding: 14px;
  font: 0.88rem/1.45 "SFMono-Regular", "Consolas", "Liberation Mono", monospace;
}

kbd {
  padding: 0.15rem 0.45rem;
  border-radius: 5px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  color: var(--accent);
  font: inherit;
}

@media (max-width: 980px) {
  .app,
  .app.config-open {
    grid-template-columns: minmax(0, 560px);
    gap: 16px;
  }

  .panel,
  .leaderboard-panel,
  .tuning-panel {
    grid-column: 1;
    width: min(92vw, 560px);
  }
}

@media (max-width: 480px) {
  body {
    min-height: 100svh;
  }

  .app {
    min-height: 100svh;
    padding: 10px;
  }

  .panel {
    width: 100%;
    padding: 10px;
  }

  .leaderboard-panel,
  .tuning-panel {
    width: 100%;
    padding: 14px;
  }

  .hud {
    margin-bottom: 8px;
  }

  .hud-card {
    min-height: 50px;
    padding: 8px 10px;
  }

  .hud strong {
    font-size: 1.45rem;
  }

  .controls-hint {
    margin-top: 10px;
    font-size: 0.84rem;
  }

  .touch-controls {
    gap: 8px;
    margin-top: 10px;
  }

  .touch-button {
    min-height: 54px;
  }

  .overlay {
    padding: 18px;
  }

  .name-form {
    width: min(100%, 220px);
  }

  .leaderboard-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .leaderboard-list li {
    grid-template-columns: 2ch minmax(0, 1fr) auto;
    min-height: 30px;
    padding: 7px 8px;
    gap: 6px;
  }

  .telemetry-grid {
    grid-template-columns: 1fr;
  }

  .tuning-actions {
    flex-direction: column;
  }
}