:root {
  color-scheme: dark;
  --bg: #121718;
  --panel: #192020;
  --panel-strong: #202929;
  --line: #314040;
  --text: #eef5ed;
  --muted: #9db0a9;
  --accent: #62d873;
  --accent-strong: #9cf06b;
  --danger: #ff6f61;
  --gold: #f2c84b;
  --water: #4fc3c7;
  font-family:
    Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(135deg, rgba(79, 195, 199, 0.16), transparent 34%),
    linear-gradient(315deg, rgba(242, 200, 75, 0.12), transparent 28%),
    var(--bg);
}

button,
input {
  font: inherit;
}

.app-shell {
  width: min(1120px, calc(100vw - 32px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(320px, 1fr) 290px;
  gap: 18px;
  align-items: center;
  padding: 24px 0;
}

.game-panel,
.side-panel {
  border: 1px solid var(--line);
  background: rgba(25, 32, 32, 0.9);
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.28);
}

.game-panel {
  border-radius: 8px;
  padding: 18px;
}

.top-bar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 14px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent-strong);
  font-size: 12px;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(28px, 6vw, 54px);
  line-height: 1;
  letter-spacing: 0;
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, 82px);
  gap: 8px;
}

.stat {
  min-height: 64px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-strong);
}

.stat span,
.speed-control span,
.legend dt {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.stat strong {
  display: block;
  margin-top: 4px;
  font-size: 28px;
  line-height: 1;
}

.board-wrap {
  position: relative;
  width: min(100%, 72vh);
  max-width: 640px;
  margin: 0 auto;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #101515;
}

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

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 8px;
  text-align: center;
  background: rgba(11, 15, 15, 0.62);
  backdrop-filter: blur(3px);
  transition: opacity 160ms ease;
  pointer-events: none;
}

.overlay.hidden {
  opacity: 0;
}

.overlay p {
  margin: 0;
  font-size: 34px;
  font-weight: 800;
}

.overlay span {
  color: var(--muted);
}

.controls {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  margin-top: 14px;
}

.actions {
  display: flex;
  gap: 8px;
}

.icon-button,
.pad-button {
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--panel-strong);
  cursor: pointer;
  transition:
    transform 120ms ease,
    border-color 120ms ease,
    background 120ms ease;
}

.icon-button {
  width: 48px;
  height: 48px;
  border-radius: 6px;
  display: grid;
  place-items: center;
  font-size: 22px;
}

.icon-button.primary {
  color: #0c1610;
  border-color: var(--accent);
  background: var(--accent);
}

.icon-button:hover,
.pad-button:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.speed-control {
  min-width: 220px;
  display: grid;
  grid-template-columns: auto 1fr 22px;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-strong);
}

input[type="range"] {
  accent-color: var(--accent);
}

.side-panel {
  border-radius: 8px;
  padding: 16px;
}

.status-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.status-strip span {
  min-height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  background: var(--panel-strong);
  font-size: 14px;
}

.pad {
  width: 190px;
  height: 190px;
  margin: 28px auto;
  display: grid;
  grid-template:
    ". up ." 1fr
    "left . right" 1fr
    ". down ." 1fr
    / 1fr 1fr 1fr;
  gap: 8px;
}

.pad-button {
  border-radius: 8px;
  font-size: 22px;
}

.pad-button:active,
.icon-button:active {
  transform: translateY(1px) scale(0.98);
}

.up {
  grid-area: up;
}

.left {
  grid-area: left;
}

.right {
  grid-area: right;
}

.down {
  grid-area: down;
}

.legend {
  display: grid;
  gap: 10px;
  margin: 0;
}

.legend div {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-strong);
}

.legend dd {
  margin: 4px 0 0;
  line-height: 1.45;
}

@media (max-width: 860px) {
  .app-shell {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .side-panel {
    padding-bottom: 18px;
  }

  .pad {
    margin: 18px auto;
  }
}

@media (max-width: 560px) {
  .app-shell {
    width: min(100vw - 18px, 520px);
    padding: 9px 0;
    gap: 10px;
  }

  .game-panel,
  .side-panel {
    padding: 10px;
  }

  .top-bar,
  .controls {
    align-items: stretch;
    flex-direction: column;
  }

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

  .speed-control {
    min-width: 0;
    width: 100%;
  }

  .overlay p {
    font-size: 28px;
  }
}