:root {
  --bg: #102417;
  --panel: rgba(9, 24, 16, 0.9);
  --panel-border: rgba(176, 255, 171, 0.24);
  --grid: #15351f;
  --grid-alt: #13301d;
  --snake: #9cff57;
  --snake-head: #d8ff72;
  --apple: #ff5a5f;
  --text: #f7ffe8;
  --muted: #c8d8bc;
  --shadow: rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  color: var(--text);
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(176, 255, 171, 0.14), transparent 34%),
    radial-gradient(circle at bottom, rgba(255, 90, 95, 0.16), transparent 30%),
    linear-gradient(180deg, #0b170f 0%, #08110c 100%);
}

.app {
  width: min(100%, 760px);
}

.intro {
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.8rem;
  color: #b5ff8c;
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 0.95;
}

.lead {
  max-width: 56ch;
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.game-shell {
  padding: 20px;
  border-radius: 28px;
  border: 1px solid var(--panel-border);
  background: linear-gradient(180deg, rgba(19, 46, 28, 0.96), var(--panel));
  box-shadow: 0 28px 54px var(--shadow);
  backdrop-filter: blur(8px);
}

.hud {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.stat {
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #c6e5b7;
}

.stat span:last-child {
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  font-weight: 700;
}

canvas {
  width: 100%;
  height: auto;
  display: block;
  background: #0e2115;
  border-radius: 22px;
  border: 2px solid rgba(204, 255, 180, 0.16);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.controls-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 16px;
}

#status {
  margin: 0;
  min-height: 1.5rem;
  color: var(--muted);
}

#restart,
.control {
  border: 0;
  cursor: pointer;
  color: #0f180b;
  font: inherit;
  font-weight: 700;
  touch-action: manipulation;
  transition: transform 140ms ease, filter 140ms ease;
}

#restart {
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  background: linear-gradient(180deg, #dcff86 0%, #9cff57 100%);
}

#restart:hover,
.control:hover {
  filter: brightness(1.05);
}

#restart:active,
.control:active {
  transform: translateY(1px) scale(0.99);
}

.touch-controls {
  width: min(260px, 100%);
  margin: 20px auto 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.control {
  min-height: 54px;
  border-radius: 18px;
  background: linear-gradient(180deg, #f5ffcf 0%, #baff7d 100%);
}

.control.up {
  grid-column: 2;
}

.control.left {
  grid-column: 1;
  grid-row: 2;
}

.control.down {
  grid-column: 2;
  grid-row: 2;
}

.control.right {
  grid-column: 3;
  grid-row: 2;
}

@media (max-width: 640px) {
  body {
    padding: 16px;
  }

  .game-shell {
    padding: 16px;
    border-radius: 24px;
  }

  .hud {
    gap: 8px;
  }

  .controls-row {
    flex-direction: column;
    align-items: stretch;
  }

  #restart {
    width: 100%;
  }
}