:root {
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  background: #020617;
  color: #e2e8f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top, rgba(59, 130, 246, 0.35), transparent 45%),
    radial-gradient(circle at 20% 70%, rgba(16, 185, 129, 0.2), transparent 35%),
    #010b18;
}

main {
  width: min(900px, 100%);
  padding: 2rem;
  border-radius: 1.25rem;
  background: rgba(4, 8, 20, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: 0 20px 40px rgba(2, 6, 23, 0.9);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: #38bdf8;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 2.8rem);
}

.status-cluster {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-align: right;
}

.score {
  font-weight: 600;
  font-size: 1rem;
}

.status {
  font-size: 0.85rem;
  color: #94a3b8;
  min-width: 180px;
}

button {
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(14, 165, 233, 0.2);
  color: #f8fafc;
  border-radius: 0.75rem;
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: 0.95rem;
  transition: background 0.2s ease, transform 0.2s ease;
}

button:hover {
  background: rgba(14, 165, 233, 0.35);
}

button:active {
  transform: translateY(1px);
}

.game {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
}

.grid {
  width: min(480px, 100%);
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: repeat(var(--grid-columns), 1fr);
  grid-auto-rows: 1fr;
  gap: 0.35rem;
  padding: 0.75rem;
  border-radius: 1rem;
  background: radial-gradient(circle, rgba(15, 23, 42, 0.7), rgba(3, 7, 18, 0.9));
  box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.7);
}

.grid-cell {
  background: #051226;
  border-radius: 0.35rem;
  transition: background 0.1s ease, transform 0.1s ease;
}

.grid-cell.snake-cell {
  background: #38bdf8;
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.8);
}

.grid-cell.food-cell {
  background: #fb923c;
  box-shadow: 0 0 12px rgba(251, 146, 60, 0.85);
}

.controls {
  margin-top: 1.5rem;
}

.helper {
  margin: 0;
  font-size: 0.9rem;
  color: #94a3b8;
}

.control-pad {
  margin-top: 0.7rem;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.control-pad button {
  width: 54px;
  height: 54px;
  font-size: 1.4rem;
}

.middle-row {
  display: flex;
  gap: 0.4rem;
}

@media (max-width: 640px) {
  main {
    margin: 1rem;
  }

  header {
    flex-direction: column;
    align-items: flex-start;
  }

  .status-cluster {
    width: 100%;
    justify-content: space-between;
    text-align: left;
  }
}