:root {
  --paper: #f5ead7;
  --paper-2: #f0dcc0;
  --paper-3: #fbf5ea;
  --ink: #1f1a14;
  --muted: #5f564a;
  --panel: rgba(255, 255, 255, 0.78);
  --border: rgba(31, 26, 20, 0.14);
  --shadow: 0 16px 30px -24px rgba(31, 26, 20, 0.35);
  --snake: #1aa3a2;
  --snake-head: #0f6f6e;
  --food: #d24a3a;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  background: radial-gradient(circle at top, #fff7e2 0%, var(--paper) 40%, var(--paper-2) 100%);
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: -10%;
  background:
    radial-gradient(circle at 12% 18%, rgba(26, 163, 162, 0.18), transparent 45%),
    radial-gradient(circle at 85% 12%, rgba(210, 74, 58, 0.18), transparent 45%);
  z-index: -2;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image: linear-gradient(120deg, rgba(255, 255, 255, 0.6), transparent 45%);
  opacity: 0.6;
  z-index: -1;
  pointer-events: none;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 24px 64px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

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

.title {
  font-family: "Fraunces", serif;
  font-size: clamp(2rem, 5vw, 2.8rem);
  letter-spacing: 0.04em;
  margin: 0;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.score {
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

#score {
  font-size: 1rem;
  color: var(--ink);
}

button,
.portal-link {
  padding: 10px 18px;
  border: 1px solid var(--border);
  background: var(--ink);
  color: var(--paper-3);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  letter-spacing: 0.05em;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

button:hover,
.portal-link:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.game {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 24px;
  align-items: start;
}

.game-area {
  width: min(90vmin, 560px);
  aspect-ratio: 1 / 1;
  border-radius: 24px;
  background: #0f1420;
  border: 1px solid rgba(31, 26, 20, 0.18);
  box-shadow: var(--shadow);
  display: grid;
  place-items: center;
  position: relative;
  touch-action: none;
  overscroll-behavior: contain;
}

canvas {
  display: block;
  border-radius: 18px;
  background: #0f1420;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(15, 20, 32, 0.65);
  border-radius: 24px;
  backdrop-filter: blur(6px);
  transition: opacity 0.2s ease;
  z-index: 2;
}

.overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.overlay-card {
  background: var(--paper-3);
  color: var(--ink);
  padding: 22px 24px;
  border-radius: 16px;
  text-align: center;
  box-shadow: var(--shadow);
}

.overlay-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.overlay-sub {
  font-size: 0.9rem;
  color: var(--muted);
}

.tips {
  background: var(--panel);
  border-radius: 18px;
  border: 1px solid var(--border);
  padding: 16px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 10px;
}

.tip {
  font-size: 0.9rem;
  color: var(--muted);
}

.tip--mobile {
  display: none;
}

.site-footer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--muted);
}

.site-footer a {
  color: inherit;
  text-decoration: none;
  font-weight: 600;
}

.site-footer a:hover {
  text-decoration: underline;
}

.footer-copy {
  font-weight: 600;
  letter-spacing: 0.02em;
}

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

  .game-area {
    width: min(92vmin, 520px);
    margin: 0 auto;
  }

  .tips {
    width: min(92vmin, 520px);
    margin: 0 auto;
    display: grid;
  }

  .portal-link {
    display: none;
  }

  .site-footer {
    font-size: 0.9rem;
    flex-direction: column;
    align-items: flex-start;
  }

  .tip--desktop {
    display: none;
  }

  .tip--mobile {
    display: block;
  }
}

@media (max-width: 520px) {
  .page {
    padding: 32px 18px 48px;
  }

  .top-actions {
    gap: 8px;
  }

  .score {
    font-size: 0.75rem;
  }

  button {
    padding: 8px 14px;
  }
}