html, body {
  margin: 0;
  min-height: 100%;
  background: #020617;
  color: #f8fafc;
  font-family: Inter, system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

.panel {
  background: rgba(15, 23, 42, 0.82);
  border: 1px solid rgba(71, 85, 105, 0.5);
  border-radius: 24px;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.28);
}

.hero {
  padding: 24px;
  display: flex;
  gap: 24px;
  justify-content: space-between;
  align-items: end;
  flex-wrap: wrap;
}

.eyebrow {
  margin: 0 0 8px 0;
  color: #22d3ee;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 12px;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: 42px;
}

.copy {
  max-width: 700px;
  color: #cbd5e1;
}

.controls {
  display: grid;
  gap: 8px;
  color: #cbd5e1;
  font-size: 14px;
}

.game-wrap {
  margin-top: 18px;
  padding: 16px;
}

canvas {
  display: block;
  width: 100%;
  border-radius: 18px;
  border: 1px solid rgba(100, 116, 139, 0.6);
  background: #020617;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.cards .panel {
  padding: 18px;
}

.cards h2 {
  margin-top: 0;
}

code {
  background: rgba(2, 6, 23, 0.75);
  padding: 2px 6px;
  border-radius: 8px;
}

@media (max-width: 900px) {
  .cards {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 34px;
  }
}