:root {
  color-scheme: dark;
  --bg-1: #090312;
  --bg-2: #13061f;
  --panel: rgba(16, 10, 28, 0.78);
  --panel-border: rgba(139, 101, 255, 0.22);
  --text: #f5f0ff;
  --muted: #b4a6d4;
  --grid-line: rgba(255, 255, 255, 0.06);
  --cell: rgba(14, 10, 24, 0.94);
  --ink: #160d27;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  overflow: hidden;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 20%, rgba(84, 246, 255, 0.22), transparent 24%),
    radial-gradient(circle at 80% 18%, rgba(255, 82, 168, 0.18), transparent 26%),
    radial-gradient(circle at 50% 80%, rgba(181, 81, 255, 0.18), transparent 30%),
    linear-gradient(180deg, var(--bg-2), var(--bg-1));
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: -10%;
  pointer-events: none;
}

body::before {
  background:
    linear-gradient(90deg, transparent 0 48%, rgba(255, 255, 255, 0.03) 50%, transparent 52%),
    linear-gradient(transparent 0 48%, rgba(255, 255, 255, 0.02) 50%, transparent 52%);
  background-size: 28px 28px;
  mix-blend-mode: screen;
  opacity: 0.28;
}

body::after {
  background:
    radial-gradient(circle at center, transparent 40%, rgba(0, 0, 0, 0.42) 100%);
}

button {
  font: inherit;
}

.app-shell {
  width: min(100%, 920px);
}

.panel {
  position: relative;
  padding: 24px;
  border: 1px solid var(--panel-border);
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent),
    var(--panel);
  box-shadow:
    0 20px 80px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(18px);
}

.panel__header,
.hud,
.controls-copy,
.touch-controls {
  display: flex;
  gap: 12px;
}

.panel__header,
.hud {
  align-items: center;
  justify-content: space-between;
}

.eyebrow {
  margin: 0 0 6px;
  color: #7ef5ff;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
}

h1 {
  margin: 0;
  font-size: clamp(2.3rem, 6vw, 4.2rem);
  line-height: 0.92;
  letter-spacing: -0.06em;
  text-shadow: 0 0 24px rgba(255, 82, 168, 0.28);
}

.intro {
  margin: 14px 0 24px;
  max-width: 62ch;
  color: var(--muted);
}

.ghost-button,
.touch-controls button {
  border: 1px solid rgba(126, 245, 255, 0.24);
  border-radius: 999px;
  background:
    linear-gradient(180deg, rgba(126, 245, 255, 0.14), rgba(255, 82, 168, 0.08));
  color: var(--text);
  padding: 10px 16px;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.ghost-button:hover,
.touch-controls button:hover {
  background:
    linear-gradient(180deg, rgba(126, 245, 255, 0.22), rgba(255, 82, 168, 0.12));
}

.hud {
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.stat {
  min-width: 120px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.stat__label {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.board-wrap {
  position: relative;
}

.board-frame {
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  background:
    radial-gradient(circle at top, rgba(126, 245, 255, 0.12), transparent 45%),
    rgba(7, 5, 15, 0.5);
}

.board-labels {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
  color: #8ef7ff;
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.board {
  --pulse: 1;
  --tilt-x: 0deg;
  --tilt-y: 0deg;
  --hue: 0;
  --spin: 0deg;
  --drift: 0px;
  --warp: 0;
  --mirror-x: 1;
  --mirror-y: 1;
  --glow: 1;
  display: grid;
  grid-template-columns: repeat(var(--grid-size), minmax(0, 1fr));
  gap: 1px;
  aspect-ratio: 1;
  padding: 1px;
  border-radius: 20px;
  overflow: hidden;
  background:
    linear-gradient(
      135deg,
      hsla(calc(var(--hue) * 1deg + 40deg), 92%, 68%, 0.42),
      hsla(calc(var(--hue) * 1deg + 160deg), 88%, 62%, 0.24) 50%,
      hsla(calc(var(--hue) * 1deg + 280deg), 92%, 68%, 0.42)
    );
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.04),
    0 0 calc(28px * var(--glow)) hsla(calc(var(--hue) * 1deg + 120deg), 90%, 64%, 0.2),
    0 0 calc(56px * var(--glow)) hsla(calc(var(--hue) * 1deg + 260deg), 88%, 60%, 0.18);
  filter:
    hue-rotate(calc(var(--warp) * 45deg))
    saturate(calc(1.1 + var(--warp) * 1.2))
    contrast(calc(1 + var(--warp) * 0.18));
  transform:
    perspective(900px)
    rotateX(var(--tilt-x))
    rotateY(var(--tilt-y))
    rotateZ(var(--spin))
    translateY(var(--drift))
    scaleX(var(--mirror-x))
    scaleY(var(--mirror-y))
    scale(var(--pulse));
}

.board[data-trip="active"] {
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.08),
    0 0 calc(60px * var(--glow)) hsla(calc(var(--hue) * 1deg + 60deg), 90%, 64%, 0.34),
    0 0 calc(92px * var(--glow)) hsla(calc(var(--hue) * 1deg + 210deg), 92%, 66%, 0.22);
}

.cell {
  position: relative;
  background:
    radial-gradient(circle at center, rgba(255, 255, 255, 0.03), transparent 60%),
    var(--cell);
  filter: blur(calc(var(--warp) * 0.3px));
}

.cell::before,
.cell::after {
  content: "";
  position: absolute;
}

.cell--empty::after {
  inset: 38%;
  border-radius: 999px;
  background: hsla(calc(var(--hue) * 1deg + var(--distance) * 10deg), 90%, 72%, calc(0.08 + var(--glow) * 0.08));
}

.cell--snake::before,
.cell--head::before {
  background:
    linear-gradient(
      135deg,
        hsla(calc(var(--hue) * 1deg + var(--segment-index, 0) * 11deg), 92%, 62%, 1),
        hsla(calc(var(--hue) * 1deg + 120deg + var(--segment-index, 0) * 9deg), 88%, 58%, 1)
    );
  box-shadow:
    0 0 calc(14px * var(--glow)) hsla(calc(var(--hue) * 1deg + 90deg), 88%, 60%, 0.34),
    0 0 calc(24px * var(--glow)) hsla(calc(var(--hue) * 1deg + 210deg), 92%, 66%, 0.2);
}

.cell--snake.cell--flow-v::before {
  inset: 2% 28%;
  border-radius: 999px;
}

.cell--snake.cell--flow-h::before {
  inset: 28% 2%;
  border-radius: 999px;
}

.cell--snake.cell--flow-turn::before {
  inset: 8%;
  border-radius: 38% 58% 42% 64%;
}

.cell--head::before {
  inset: 12%;
  border-radius: 42% 58% 50% 50%;
  background:
    radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.45), transparent 18%),
    linear-gradient(
      135deg,
      hsla(calc(var(--hue) * 1deg + 40deg), 98%, 72%, 1),
      hsla(calc(var(--hue) * 1deg + 180deg), 98%, 64%, 1) 55%,
      hsla(calc(var(--hue) * 1deg + 300deg), 98%, 70%, 1)
    );
  box-shadow:
    0 0 calc(20px * var(--glow)) hsla(calc(var(--hue) * 1deg + 40deg), 98%, 72%, 0.4),
    0 0 calc(36px * var(--glow)) hsla(calc(var(--hue) * 1deg + 240deg), 98%, 66%, 0.24);
}

.cell--head::after {
  width: 22%;
  height: 22%;
  border-radius: 999px;
  background: #150a1f;
  top: 39%;
  left: 39%;
}

.cell--head.cell--facing-up::after {
  top: 18%;
}

.cell--head.cell--facing-down::after {
  top: 60%;
}

.cell--head.cell--facing-left::after {
  left: 18%;
}

.cell--head.cell--facing-right::after {
  left: 60%;
}

.cell--food::before {
  inset: 14%;
  border-radius: 50% 40% 60% 45%;
  background:
    radial-gradient(circle at 40% 40%, #fff2bd 0 18%, transparent 19%),
    radial-gradient(circle at 60% 60%, hsla(calc(var(--hue) * 1deg + 140deg), 92%, 64%, 0.42), transparent 45%),
    linear-gradient(
      135deg,
      hsla(calc(var(--hue) * 1deg + 10deg), 100%, 68%, 1),
      hsla(calc(var(--hue) * 1deg + 150deg), 100%, 64%, 1) 55%,
      hsla(calc(var(--hue) * 1deg + 260deg), 100%, 72%, 1)
    );
  box-shadow:
    0 0 calc(18px * var(--glow)) hsla(calc(var(--hue) * 1deg + 30deg), 100%, 70%, 0.4),
    0 0 calc(34px * var(--glow)) hsla(calc(var(--hue) * 1deg + 190deg), 98%, 66%, 0.22);
}

.cell--food::after {
  inset: 28%;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
}

.board[data-status="paused"] {
  filter: saturate(0.5) brightness(0.8);
}

.board[data-status="game-over"] {
  filter: hue-rotate(130deg) saturate(0.65);
}

.overlay {
  position: absolute;
  inset: 14px;
  display: grid;
  place-items: center;
  gap: 12px;
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(16, 10, 28, 0.86), rgba(9, 3, 18, 0.9));
  border: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
  backdrop-filter: blur(10px);
}

.overlay[hidden] {
  display: none;
}

.overlay p {
  margin: 0;
  font-size: 1.2rem;
}

.dose-copy {
  color: var(--muted);
  font-size: 0.95rem;
}

.dose-picker {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.dose-picker .ghost-button.is-selected,
.dose-picker .ghost-button[data-selected="true"],
.dose-picker .ghost-button[aria-pressed="true"] {
  border-color: rgba(255, 255, 255, 0.45);
  background:
    linear-gradient(180deg, rgba(126, 245, 255, 0.3), rgba(255, 82, 168, 0.22));
  box-shadow:
    0 0 24px rgba(126, 245, 255, 0.28),
    0 0 40px rgba(255, 82, 168, 0.14),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transform: translateY(-1px) scale(1.03);
  color: #ffffff;
}

.controls-copy {
  margin-top: 18px;
  color: var(--muted);
  flex-wrap: wrap;
}

.touch-controls {
  margin-top: 18px;
  flex-direction: column;
  align-items: center;
}

.touch-controls__row {
  display: flex;
  gap: 12px;
}

@media (max-width: 640px) {
  body {
    padding: 12px;
  }

  .panel {
    padding: 16px;
    border-radius: 22px;
  }

  .panel__header {
    align-items: flex-start;
    flex-direction: column;
  }

  .ghost-button {
    width: 100%;
  }

  .touch-controls button {
    min-width: 88px;
  }
}