:root {
  --snake-ink: #f2f3ed;
  --snake-muted: #a3adbf;
  --snake-lime: #d8f879;
  --snake-board: #182333;
}
body[data-page="snake"] {
  min-height: 100vh;
  margin: 0;
  color: var(--snake-ink);
  background:
    radial-gradient(720px 520px at 82% 10%, rgba(95, 83, 164, .18), transparent 68%),
    radial-gradient(600px 500px at 8% 55%, rgba(46, 123, 97, .15), transparent 70%),
    linear-gradient(180deg, #111624 0%, #0a0e17 68%, #090c13 100%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.snake-shell { width: min(980px, 100%); margin: 0 auto; padding: 0 30px; }
.snake-header { height: 76px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid rgba(211,223,243,.1); }
.snake-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--snake-ink); font-size: 16px; font-weight: 780; letter-spacing: -.06em; text-decoration: none; }
.brand-mark { position: relative; display: grid; width: 32px; height: 32px; place-items: center; overflow: hidden; border: 1px solid rgba(216,248,121,.58); border-radius: 10px; color: var(--snake-lime); background: rgba(216,248,121,.09); font-size: 15px; font-weight: 850; }
.brand-mark i { position: absolute; width: 7px; height: 7px; right: 5px; bottom: 5px; border-radius: 2px; background: var(--snake-lime); transform: rotate(45deg); }
.brand-period { color: var(--snake-lime); }
.snake-back { color: #abb5c6; text-decoration: none; font-size: 12px; transition: color .18s ease; }
.snake-back:hover { color: var(--snake-lime); }
.snake-back span { margin-right: 7px; color: var(--snake-lime); }
.snake-main { padding: 44px 0 55px; }
.snake-intro { margin-bottom: 24px; }
.snake-eyebrow { display: flex; align-items: center; gap: 8px; margin: 0 0 10px; color: #bdc8d9; font-size: 9px; font-weight: 760; letter-spacing: .18em; }
.snake-eyebrow span { width: 6px; height: 6px; border-radius: 50%; background: var(--snake-lime); box-shadow: 0 0 12px rgba(216,248,121,.7); }
.snake-intro h1 { margin: 0; font-size: clamp(48px, 6vw, 68px); line-height: .98; letter-spacing: -.075em; }
.snake-intro h1 span { color: var(--snake-lime); }
.snake-intro > p:last-child { margin: 10px 0 0; color: var(--snake-muted); font-size: 13px; line-height: 1.6; }
.snake-layout { display: grid; grid-template-columns: minmax(0, 1fr) 235px; align-items: start; gap: 16px; }
.snake-board-wrap, .snake-panel { border: 1px solid rgba(211,223,243,.13); border-radius: 20px; background: linear-gradient(155deg, rgba(25,33,51,.91), rgba(14,19,30,.96)); box-shadow: 0 24px 70px rgba(0,0,0,.23); }
.snake-board-wrap { padding: 17px; }
.snake-board-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin: 0 1px 12px; color: #919db0; font-size: 9px; font-weight: 750; letter-spacing: .13em; }
.snake-board-top span:last-child { color: #828da1; font-size: 10px; font-weight: 450; letter-spacing: 0; }
.snake-board { display: grid; width: min(100%, 540px); aspect-ratio: 1; grid-template-columns: repeat(18, minmax(0, 1fr)); grid-template-rows: repeat(18, minmax(0, 1fr)); gap: 2px; margin-inline: auto; padding: 9px; overflow: hidden; border: 1px solid rgba(211,223,243,.08); border-radius: 14px; background: #121b28; touch-action: none; user-select: none; }
.snake-cell { min-width: 0; border-radius: 3px; background: rgba(139,161,187,.07); }
.snake-cell.snake-body { background: linear-gradient(145deg, #a7d85a, #77af42); box-shadow: inset 0 1px rgba(255,255,255,.21), 0 0 9px rgba(156,224,82,.12); }
.snake-cell.snake-head { position: relative; border-radius: 5px; background: var(--snake-lime); box-shadow: 0 0 14px rgba(216,248,121,.3); }
.snake-cell.snake-head::after { position: absolute; top: 23%; right: 20%; width: 18%; height: 18%; border-radius: 50%; background: #263626; content: ""; }
.snake-cell.food { position: relative; border-radius: 50%; background: radial-gradient(circle at 35% 28%, #ffcfab, #f17b69 62%, #b94e55); box-shadow: 0 0 15px rgba(241,123,105,.35); animation: food-pulse .8s ease-in-out infinite alternate; }
@keyframes food-pulse { to { transform: scale(.76); } }
.snake-status-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 11px 3px 0; }
.snake-status-row p { min-height: 18px; margin: 0; color: #aeb9ca; font-size: 10px; line-height: 1.5; }
.start-pause, .new-snake { display: flex; flex: 0 0 auto; min-height: 39px; align-items: center; justify-content: center; gap: 8px; padding: 0 13px; border: 0; border-radius: 10px; color: #151b12; background: var(--snake-lime); font: inherit; font-size: 10px; font-weight: 800; cursor: pointer; transition: transform .18s ease, background .18s ease; }
.start-pause:hover, .new-snake:hover { transform: translateY(-1px); background: #e4ff9a; }
.snake-panel { display: flex; flex-direction: column; gap: 12px; padding: 13px; }
.snake-scores { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.snake-scores > div { display: grid; gap: 5px; padding: 11px; border: 1px solid rgba(211,223,243,.09); border-radius: 13px; background: rgba(5,9,16,.26); }
.snake-scores span, .snake-tip > span { color: #8996aa; font-size: 8px; font-weight: 760; letter-spacing: .14em; }
.snake-scores strong { color: #f3f4ed; font-size: 22px; letter-spacing: -.045em; }
.snake-tip { padding: 12px; border: 1px solid rgba(211,223,243,.09); border-radius: 13px; background: rgba(5,9,16,.22); }
.snake-tip p { margin: 8px 0 10px; color: #a5b0c2; font-size: 10px; line-height: 1.6; }
.snake-food-key { display: flex; align-items: center; gap: 7px; color: #aab5c5; font-size: 10px; }
.snake-food-key i { width: 8px; height: 8px; border-radius: 50%; background: #f17b69; box-shadow: 0 0 7px rgba(241,123,105,.35); }
.snake-food-key b { margin-left: auto; color: var(--snake-lime); font-size: 10px; }
.snake-dpad { display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(2, 40px); gap: 5px; justify-items: center; }
.snake-dpad button { display: grid; width: 100%; max-width: 58px; place-items: center; border: 1px solid rgba(211,223,243,.13); border-radius: 10px; color: #e2e7ef; background: rgba(255,255,255,.035); font: inherit; font-size: 17px; cursor: pointer; transition: border-color .15s ease, color .15s ease, background .15s ease; }
.snake-dpad button:hover, .snake-dpad button:focus-visible { border-color: rgba(216,248,121,.42); color: var(--snake-lime); background: rgba(216,248,121,.07); }
.snake-dpad button:focus-visible, .start-pause:focus-visible, .new-snake:focus-visible { outline: 2px solid var(--snake-lime); outline-offset: 2px; }
.snake-dpad button[data-direction="up"] { grid-column: 2; grid-row: 1; }
.snake-dpad button[data-direction="left"] { grid-column: 1; grid-row: 2; }
.snake-dpad button[data-direction="down"] { grid-column: 2; grid-row: 2; }
.snake-dpad button[data-direction="right"] { grid-column: 3; grid-row: 2; }
.new-snake { width: 100%; min-height: 40px; }
.new-snake span { font-size: 15px; }
.snake-note { margin: 0; color: #778398; font-size: 9px; line-height: 1.5; text-align: center; }
.snake-footer { display: flex; align-items: center; gap: 20px; min-height: 68px; border-top: 1px solid rgba(211,223,243,.1); color: #7e899c; font-size: 10px; }
.snake-footer > span:first-child { color: #c5ccda; font-weight: 750; }
.snake-footer > a { margin-left: auto; color: #c8d1df; text-decoration: none; }
.snake-footer > a:hover { color: var(--snake-lime); }
.snake-footer b { margin-left: 5px; color: var(--snake-lime); }
@media (max-width: 700px) {
  .snake-shell { padding-inline: 18px; }
  .snake-main { padding-top: 34px; }
  .snake-layout { grid-template-columns: minmax(0, 1fr) 210px; gap: 11px; }
  .snake-board-wrap { padding: 12px; }
  .snake-panel { padding: 10px; gap: 9px; }
  .snake-scores > div, .snake-tip { padding: 9px; }
}
@media (max-width: 560px) {
  .snake-shell { padding-inline: 13px; }
  .snake-layout { grid-template-columns: 1fr; }
  .snake-board-wrap { padding: 10px; }
  .snake-board { width: min(100%, 440px); gap: 2px; padding: 7px; }
  .snake-status-row { align-items: start; }
  .snake-panel { display: grid; grid-template-columns: 1fr 1fr; }
  .snake-scores, .snake-tip { grid-column: 1 / -1; }
  .snake-dpad { grid-row: span 2; }
  .snake-note { align-self: center; }
}
@media (max-width: 360px) {
  .snake-shell { padding-inline: 9px; }
  .snake-board { gap: 1px; padding: 5px; }
  .snake-status-row p { font-size: 9px; }
  .start-pause { padding-inline: 9px; }
}
@media (prefers-reduced-motion: reduce) {
  body[data-page="snake"] *, body[data-page="snake"] *::before, body[data-page="snake"] *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}