/*
 * theme.css — Snake Mania. Neon arcade: night-blue ground, glowing green
 * snake, electric blue + hot pink food. Opens dark; light is the alternate.
 */

:root {
  color-scheme: dark;
  --canvas: #070b14;
  --surface: #0d1424;
  --surface-2: #142038;
  --border: #1f3050;
  --border-strong: #2f4a78;
  --ink: #e8f1ff;
  --muted: #8ea4c8;
  --accent: #2dff8f;
  --accent-hover: #6bffb1;
  --accent-ink: #03150b;
  --accent-text: #2dff8f;
  --accent-strong: #7dffbb;
  --accent-soft: #0e2a24;
  --accent-border: #1c6b4a;
  --success: #2dff8f;
  --success-ink: #03150b;
  --success-soft: #0e2a24;
  --success-strong: #7dffbb;
  --warning: #ffb02e;
  --warning-ink: #1a0f00;
  --warning-soft: #33250c;
  --warning-strong: #ffc966;
  --danger: #ff3d71;
  --danger-ink: #1c0309;
  --danger-soft: #3a1020;
  --danger-strong: #ff8aa6;
  --chart-1: #2dff8f;
  --chart-2: #3da5ff;
  --chart-3: #ff3d71;
  --chart-4: #ffb02e;
  --chart-5: #a678ff;
  --chart-6: #36e0d6;

  --font-display: "Orbitron", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Rajdhani", ui-sans-serif, system-ui, sans-serif;
  --font-sans: "Rajdhani", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono Variable", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --display-weight: 800;
  --display-tracking: 0.04em;
  --eyebrow-tracking: 0.18em;

  --radius-btn: 999px;
  --radius-card: 1.25rem;
  --radius-input: 0.75rem;
  --x-food: #3da5ff;
  --x-board: #050912;
  --x-grid: #14223d;
  --x-snake-tail: #19c9a8;
}

html[data-theme="light"] {
  color-scheme: light;
  --canvas: #e9f1f7;
  --surface: #ffffff;
  --surface-2: #dbe8f2;
  --border: #bcd0e2;
  --border-strong: #8aa8c6;
  --ink: #0a1a2e;
  --muted: #4a6482;
  --accent: #067038;
  --accent-hover: #055c2e;
  --accent-ink: #ffffff;
  --accent-text: #066a35;
  --accent-strong: #065f33;
  --accent-soft: #d3f2e2;
  --accent-border: #7bcaa1;
  --success: #067038;
  --success-ink: #ffffff;
  --success-soft: #d3f2e2;
  --success-strong: #065f33;
  --warning: #a14a07;
  --warning-ink: #ffffff;
  --warning-soft: #f7e6d3;
  --warning-strong: #8f4107;
  --danger: #b8103a;
  --danger-ink: #ffffff;
  --danger-soft: #fbdce5;
  --danger-strong: #a00e32;
  --chart-1: #067038;
  --chart-2: #1769c9;
  --chart-3: #c7123f;
  --chart-4: #b45309;
  --chart-5: #6a3fd0;
  --chart-6: #0b7f78;

  --x-food: #1769c9;
  --x-board: #f6fafd;
  --x-grid: #d6e4f0;
  --x-snake-tail: #0b7f78;
}

/*
 * app.css — Snake Mania: the arcade ground, the stage, the board frame,
 * the overlays and the d-pad. Tokens only.
 */

/* ---------- ground ---------- */
.arcade-bg {
  font-family: var(--font-body);
  background-image:
    radial-gradient(ellipse 60rem 28rem at 50% -8%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%),
    radial-gradient(ellipse 36rem 28rem at 100% 100%, color-mix(in srgb, var(--x-food) 14%, transparent), transparent 70%),
    linear-gradient(color-mix(in srgb, var(--border) 38%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--border) 38%, transparent) 1px, transparent 1px);
  background-size: auto, auto, 2.5rem 2.5rem, 2.5rem 2.5rem;
  background-attachment: fixed;
}

.neon-title {
  color: var(--accent-text);
  text-shadow:
    0 0 0.5rem color-mix(in srgb, var(--accent) 55%, transparent),
    0 0 2rem color-mix(in srgb, var(--accent) 30%, transparent);
}

/* ---------- stage + screens ---------- */
.stage {
  --chrome: 14rem;
  width: 100%;
}
@media (pointer: coarse), (max-width: 40rem) {
  .stage { --chrome: 21rem; }
}

.stage[data-screen="menu"] .screen-play { display: none; }
.stage:not([data-screen="menu"]) .screen-menu { display: none; }

@keyframes screen-in {
  from { opacity: 0; transform: translateY(0.75rem) scale(0.985); }
  to { opacity: 1; transform: none; }
}
.screen-menu,
.screen-play {
  animation: screen-in 0.35s ease-out;
}

/* ---------- menu ---------- */
.menu-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  text-align: center;
  background: linear-gradient(160deg, var(--surface), var(--surface-2));
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-card);
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--accent) 10%, transparent),
    0 0 3rem color-mix(in srgb, var(--accent) 16%, transparent);
}
.menu-emblem {
  width: 8.5rem;
  height: auto;
  color: var(--accent);
  filter: drop-shadow(0 0 0.6rem color-mix(in srgb, var(--accent) 70%, transparent));
}
.menu-emblem .emblem-food {
  fill: var(--x-food);
  filter: drop-shadow(0 0 0.4rem var(--x-food));
}

.seg {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.25rem;
  width: 100%;
  padding: 0.25rem;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-btn);
}
.seg-btn {
  padding: 0.5rem 0.25rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: transparent;
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}
.seg-btn:hover { color: var(--ink); }
.seg-btn[aria-pressed="true"] {
  color: var(--accent-ink);
  background: var(--accent);
  box-shadow: 0 0 1.25rem color-mix(in srgb, var(--accent) 45%, transparent);
}
.seg-btn:focus-visible,
.dpad-btn:focus-visible {
  outline: 2px solid var(--accent-text);
  outline-offset: 2px;
}

.how {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: 100%;
  padding: 0.75rem 1rem;
  text-align: left;
  list-style: none;
  background: color-mix(in srgb, var(--canvas) 55%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius-input);
}
.how li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 1rem;
  line-height: 1.3;
  color: var(--muted);
}
.how .icon { flex: none; margin-top: 0.125rem; color: var(--accent-text); }
.how b { color: var(--ink); font-weight: 700; }

.menu-best {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.0625rem;
  color: var(--muted);
}
.menu-best .icon { color: var(--accent-text); }
.menu-best strong {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* ---------- play screen ---------- */
.screen-play {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
.board-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: min(100%, 34rem);
  width: max(15rem, min(100%, 34rem, calc(100svh - var(--chrome))));
}

.hud {
  display: grid;
  grid-template-columns: 1fr 1fr auto auto;
  align-items: stretch;
  gap: 0.5rem;
}
.stat {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: 0.25rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-input);
}
.stat-label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: var(--eyebrow-tracking);
  text-transform: uppercase;
  color: var(--muted);
}
.stat-value {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.stat.beaten {
  border-color: var(--accent-border);
  box-shadow: 0 0 1.25rem color-mix(in srgb, var(--accent) 35%, transparent);
}
.stat.beaten .stat-value { color: var(--accent-text); }

@keyframes score-pop {
  0% { transform: scale(1); }
  40% { transform: scale(1.35); color: var(--accent-text); }
  100% { transform: scale(1); }
}
.stat-value.pop {
  display: inline-block;
  transform-origin: left center;
  animation: score-pop 0.3s ease-out;
}

.ico-play { display: none; }
.stage[data-screen="paused"] .ico-pause { display: none; }
.stage[data-screen="paused"] .ico-play { display: inline-flex; }

.board-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  overflow: hidden;
  touch-action: none;
  user-select: none;
  background: var(--x-board);
  border: 2px solid var(--accent-border);
  border-radius: var(--radius-card);
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--accent) 12%, transparent),
    0 0 2.5rem color-mix(in srgb, var(--accent) 22%, transparent);
}
.board-wrap canvas {
  display: block;
  width: 100%;
  aspect-ratio: 1;
}
@keyframes board-shake {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-0.4rem, 0.15rem); }
  40% { transform: translate(0.35rem, -0.15rem); }
  60% { transform: translate(-0.25rem, 0.1rem); }
  80% { transform: translate(0.2rem, 0); }
}
.board-wrap.shake { animation: board-shake 0.4s ease-out; }
.stage[data-screen="over"] .board-wrap { border-color: var(--danger); }
.stage[data-record="true"][data-screen="over"] .board-wrap { border-color: var(--accent); }

.board-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1rem;
  color: var(--muted);
}
.board-caption b {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* ---------- overlays (pause / game over) ---------- */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem;
  text-align: center;
  background: color-mix(in srgb, var(--canvas) 80%, transparent);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transform: scale(0.97);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
}
.stage[data-screen="paused"] .ov-pause,
.stage[data-screen="over"] .ov-over {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.stage[data-screen="over"] .ov-over { transition-delay: 0.45s; }
.overlay .btn { width: 100%; max-width: 13rem; }

.overlay-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--ink);
}
.stage[data-screen="over"] .overlay-title { color: var(--danger-strong); }
.stage[data-record="true"] .overlay-title { color: var(--accent-text); }

.over-scores {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-block: 0.25rem;
}
.over-scores span {
  display: block;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: var(--eyebrow-tracking);
  text-transform: uppercase;
  color: var(--muted);
}
.over-scores strong {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.record-badge {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-ink);
  background: var(--accent);
  border-radius: var(--radius-btn);
  box-shadow: 0 0 1.5rem color-mix(in srgb, var(--accent) 60%, transparent);
}
@keyframes record-pulse {
  from { transform: scale(1); }
  to { transform: scale(1.08); }
}
.stage[data-record="true"] .record-badge {
  display: inline-flex;
  animation: record-pulse 0.7s ease-in-out infinite alternate;
}

/* ---------- d-pad (touch + small screens) ---------- */
.dpad {
  display: none;
  grid-template-columns: repeat(3, 3.5rem);
  grid-template-rows: repeat(2, 3.5rem);
  gap: 0.5rem;
}
@media (pointer: coarse), (max-width: 40rem) {
  .dpad { display: grid; }
  .keys-hint { display: none; }
}
.dpad-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-text);
  background: var(--surface);
  border: 1px solid var(--accent-border);
  border-radius: 999px;
  cursor: pointer;
  touch-action: manipulation;
  user-select: none;
  transition: background 0.12s, box-shadow 0.12s, transform 0.12s;
}
.dpad-btn:active {
  background: var(--accent-soft);
  transform: scale(0.94);
  box-shadow: 0 0 1.25rem color-mix(in srgb, var(--accent) 45%, transparent);
}
.dpad-btn .icon { width: 1.5rem; height: 1.5rem; }
.dpad-up { grid-column: 2; grid-row: 1; }
.dpad-left { grid-column: 1; grid-row: 2; }
.dpad-down { grid-column: 2; grid-row: 2; }
.dpad-right { grid-column: 3; grid-row: 2; }

.keys-hint {
  margin-top: 0.75rem;
  font-size: 0.9375rem;
  text-align: center;
  color: var(--muted);
}
.keys-hint kbd {
  padding: 0.0625rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: 0.375rem;
}

/* ---------- sound toggle ---------- */
.snd-off { display: none; }
html[data-sound="off"] .snd-on { display: none; }
html[data-sound="off"] .snd-off { display: inline-flex; }
.snd-on, .snd-off { align-items: center; justify-content: center; }
.snd-on { display: inline-flex; }

/* ---------- reduced motion ---------- */
html.reduced-motion .screen-menu,
html.reduced-motion .screen-play,
html.reduced-motion .board-wrap.shake,
html.reduced-motion .stat-value.pop,
html.reduced-motion .record-badge {
  animation: none !important;
}
html.reduced-motion .overlay,
html.reduced-motion .seg-btn,
html.reduced-motion .dpad-btn {
  transition: none !important;
}