:root {
  --bg: #0d1020;
  --panel: rgba(255, 255, 255, 0.08);
  --panel-strong: rgba(255, 255, 255, 0.13);
  --line: rgba(255, 255, 255, 0.16);
  --text: #f8fbff;
  --muted: #a9b6ce;
  --cyan: #22d3ee;
  --pink: #fb4e88;
  --green: #50e3a4;
  --yellow: #ffe66d;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 18% 12%, rgba(34, 211, 238, 0.24), transparent 28%),
    radial-gradient(circle at 82% 18%, rgba(251, 78, 136, 0.22), transparent 26%),
    linear-gradient(145deg, #0d1020 0%, #15192e 48%, #09111f 100%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

.home-link {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: rgba(13, 16, 32, 0.76);
  text-decoration: none;
  font-weight: 850;
  backdrop-filter: blur(16px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.24);
}

.game-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 76px 0 28px;
}

.hero {
  text-align: center;
  margin-bottom: 24px;
}

.eyebrow {
  display: inline-flex;
  margin: 0 0 10px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--cyan);
  background: rgba(255, 255, 255, 0.07);
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(3.4rem, 10vw, 7.8rem);
  line-height: 0.86;
  letter-spacing: 0;
  text-shadow: 0 0 28px rgba(34, 211, 238, 0.36);
}

.subtitle {
  max-width: 620px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.18rem);
  line-height: 1.5;
}

.play-layout {
  display: grid;
  grid-template-columns: minmax(210px, 0.78fr) minmax(300px, 420px) minmax(210px, 0.78fr);
  gap: 18px;
  align-items: start;
}

.side-panel,
.board-card,
.touch-controls {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.side-panel {
  display: grid;
  gap: 14px;
  padding: 16px;
}

.metric,
.preview-card,
.help {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
  padding: 14px;
}

.metric span,
.preview-card span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 850;
  text-transform: uppercase;
}

.metric strong {
  display: block;
  margin-top: 4px;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
}

.mini-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.preview-card canvas {
  display: block;
  width: 120px;
  height: 120px;
  margin: 10px auto 0;
}

.board-card {
  position: relative;
  padding: 14px;
  background: rgba(5, 8, 18, 0.72);
}

#board {
  display: block;
  width: 100%;
  max-width: 390px;
  aspect-ratio: 1 / 2;
  height: auto;
  margin: 0 auto;
  border-radius: 8px;
  background: #080b16;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08), 0 0 32px rgba(34, 211, 238, 0.14);
}

.overlay {
  position: absolute;
  inset: 14px;
  display: grid;
  place-content: center;
  gap: 10px;
  text-align: center;
  border-radius: 8px;
  background: rgba(5, 8, 18, 0.76);
}

.overlay.hidden {
  display: none;
}

.overlay strong {
  font-size: 2.4rem;
}

.overlay span {
  color: var(--muted);
  font-weight: 700;
}

.controls-panel button,
.touch-controls button {
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  background: var(--panel-strong);
  font-weight: 900;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}

.controls-panel button:hover,
.touch-controls button:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.18);
}

.controls-panel .primary {
  border-color: transparent;
  color: #07111d;
  background: linear-gradient(135deg, var(--cyan), var(--green));
}

.help {
  color: var(--muted);
  line-height: 1.45;
}

.help p {
  margin: 0;
}

.help p + p {
  margin-top: 8px;
}

.touch-controls {
  display: none;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 16px;
  padding: 12px;
}

.touch-controls .wide {
  grid-column: span 2;
}

@media (max-width: 920px) {
  .play-layout {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .controls-panel {
    display: none;
  }

  .touch-controls {
    display: grid;
  }
}

@media (max-width: 560px) {
  .game-shell {
    width: min(100% - 20px, 460px);
    padding-top: 72px;
  }

  .side-panel {
    grid-template-columns: 1fr;
  }

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

  .preview-card canvas {
    width: 96px;
    height: 96px;
  }

  .touch-controls {
    grid-template-columns: repeat(3, 1fr);
  }
}