:root {
  --bg: #050505;
  --text: #f4f4f4;
  --muted: #8a8a8a;
  --red: #e82127;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  overflow: hidden;
}

.snake-app {
  height: 100%;
  display: grid;
  grid-template-rows: auto 1fr;
  padding: 16px 20px 18px;
  gap: 12px;
}

.snake-app > header {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.snake-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 56px;
  flex-wrap: wrap;
}

.back-link,
.snake-top h1 {
  font-size: 28px;
  font-weight: 600;
}

.back-link {
  color: #fff;
  text-decoration: none;
  padding: 8px 16px;
  border: 2px solid #fff;
  border-radius: 999px;
  white-space: nowrap;
}

.back-link:active {
  background: #fff;
  color: #000;
}

.scores {
  display: flex;
  gap: 20px;
  font-size: 22px;
  color: var(--muted);
  white-space: nowrap;
}

.scores b {
  color: #fff;
  font-weight: 600;
}

.snake-main {
  min-height: 0;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 16px;
}

.board-wrap {
  min-width: 0;
  min-height: 0;
  position: relative;
  background: #0b0b0b;
  border-radius: 20px;
  overflow: hidden;
}

#board {
  width: 100%;
  height: 100%;
  display: block;
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.45);
}

.overlay.hidden {
  display: none;
}

#overlay-text {
  font-size: 36px;
  font-weight: 600;
}

.pad {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: 1fr 1fr 1fr;
  gap: 10px;
  min-height: 0;
}

.pad-btn {
  border: 0;
  border-radius: 18px;
  background: #1c1c1c;
  color: #fff;
  font-size: 26px;
  font-weight: 600;
}

.pad-btn:active {
  background: var(--red);
}

.pad-up { grid-column: 2; grid-row: 1; }
.pad-left { grid-column: 1; grid-row: 2; }
.pad-right { grid-column: 3; grid-row: 2; }
.pad-down { grid-column: 2; grid-row: 3; }

@media (max-aspect-ratio: 5/4) {
  .snake-main {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 200px;
  }
  .pad {
    max-width: 280px;
    justify-self: center;
    width: 100%;
  }
}