:root {
  color-scheme: dark;
  --bg: #05060a;
  --card: #11131b;
  --card-light: #1a1d2a;
  --accent: #49d8a6;
  --accent-strong: #16ffbd;
  --text: #f4f6ff;
  --muted: #93a1be;
  --danger: #ff4d6d;
  --border: rgba(255, 255, 255, 0.08);
  font-family: 'Space Grotesk', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, #232a41, #05060a 60%);
  color: var(--text);
  padding: 2.5rem clamp(1rem, 2vw, 3rem) 4rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.hero {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: flex-end;
}

.hero h1 {
  font-size: clamp(2.4rem, 4vw, 3.5rem);
  margin: 0.2rem 0 0.8rem;
}

.hero p {
  max-width: 55ch;
  margin: 0;
  line-height: 1.4;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

button {
  font: inherit;
  border: none;
  border-radius: 999px;
  padding: 0.8rem 1.8rem;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

button:active {
  transform: translateY(2px) scale(0.98);
}

.primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-strong));
  color: #03150f;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(22, 255, 189, 0.25);
}

.ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0;
}

.layout {
  display: grid;
  grid-template-columns: minmax(280px, 640px) minmax(240px, 420px);
  gap: 2rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1.5rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

.playfield-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

#board {
  width: min(100%, 420px);
  height: auto;
  border-radius: 16px;
  background: #05060a;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.status-bar {
  width: 100%;
  display: flex;
  justify-content: space-between;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.status-bar .label {
  display: block;
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.6);
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.module {
  background: var(--card-light);
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: 1.2rem;
}

.module h2,
.module h3 {
  margin: 0 0 0.8rem;
  font-size: 1.05rem;
}

.scoreboard dl {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.8rem;
  margin: 0;
}

.scoreboard dt {
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.scoreboard dd {
  margin: 0.2rem 0 0;
  font-size: 1.8rem;
  font-weight: 600;
}

.previews {
  display: grid;
  gap: 1rem;
}

.preview-stack {
  display: grid;
  gap: 0.6rem;
}

.preview {
  width: 100%;
  border-radius: 14px;
  background: #05060a;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.controls ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.touch-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
  gap: 0.6rem;
  border: 1px dashed rgba(255, 255, 255, 0.08);
}

.touch-controls button {
  border-radius: 16px;
  background: rgba(73, 216, 166, 0.08);
  color: var(--text);
  border: 1px solid transparent;
  padding: 0.9rem 0.4rem;
  font-weight: 600;
}

.touch-controls button[data-action='drop'] {
  background: rgba(22, 255, 189, 0.2);
  border-color: rgba(22, 255, 189, 0.3);
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 960px) {
  body {
    padding: 2rem 1.2rem 3rem;
  }
  .layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    order: -1;
  }
}

@media (max-width: 540px) {
  #board {
    width: 100%;
  }
  .hero {
    flex-direction: column;
    align-items: flex-start;
  }
}