Build a Snake game as a polished single-page web app in this directory: index.html, sty…

claude-codeclaude-fable-5 · 55 steps · 10m 16s · 3 filessession 0c9ba00c-6f2@agentsage

Build a Snake game as a polished single-page web app in this directory: index.html, style.css, game.js (vanilla JS, no deps). Canvas grid; snake grows on eating food; dies on wall or self collision; live score and a high score persisted in localStorage; speed ramps up as the score climbs; arrow keys AND wasd; spacebar to pause; a game-over overlay with a restart button; and a sharp dark neon theme. Make it genuinely nice.

same matchpi · 18 steps codex · 73 steps claude-code · 55 steps antigravity · 22 steps

compare in arena

step 33 / 55

style.csschange 2/2

/* ---------- Neon Snake ---------- */
 
:root {
  --bg-0: #04050c;
  --bg-1: #0a0e1e;
  --cyan: #22ffd3;
  --cyan-dim: rgba(34, 255, 211, 0.28);
  --cyan-faint: rgba(34, 255, 211, 0.1);
  --pink: #ff2e88;
  --pink-dim: rgba(255, 46, 136, 0.35);
  --violet: #7c5cff;
  --text: #d7fff6;
  --muted: #63808f;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}
 
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
 
html,
body {
  height: 100%;
}
 
body {
  font-family: var(--mono);
  color: var(--text);
  background:
    radial-gradient(1100px 700px at 50% -10%, rgba(124, 92, 255, 0.14), transparent 60%),
    radial-gradient(900px 600px at 50% 115%, rgba(34, 255, 211, 0.08), transparent 60%),
    linear-gradient(var(--bg-0), var(--bg-1));
  display: grid;
  place-items: center;
  min-height: 100dvh;
  padding: 20px;
  user-select: none;
  -webkit-user-select: none;
}
 
.frame {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
 
/* ---------- header ---------- */
 
.top {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
 
.logo {
  font-size: clamp(22px, 4.5vw, 32px);
  font-weight: 800;
  letter-spacing: 0.42em;
  margin-right: -0.42em; /* optically recenter tracked-out text */
  color: #ffffff;
  text-shadow:
    0 0 6px rgba(34, 255, 211, 0.9),
    0 0 24px rgba(34, 255, 211, 0.45),
    0 0 60px rgba(34, 255, 211, 0.25);
}
 
.logo span {
  color: var(--pink);
  text-shadow:
    0 0 6px rgba(255, 46, 136, 0.9),
    0 0 24px rgba(255, 46, 136, 0.5),
    0 0 60px rgba(255, 46, 136, 0.3);
  animation: neon-flicker 9s infinite;
}
 
@keyframes neon-flicker {
  0%, 41%, 43.5%, 45%, 100% { opacity: 1; }
  42%, 44% { opacity: 0.45; }
  42.5% { opacity: 0.7; }
}
 
.hud {
  display: flex;
  gap: 10px;
}
 
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 92px;
  padding: 8px 14px 6px;
  border: 1px solid var(--cyan-dim);
  border-radius: 8px;
  background: rgba(10, 16, 32, 0.65);
  box-shadow: inset 0 0 18px rgba(34, 255, 211, 0.05);
}
 
.stat-label {
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
}
 
.stat-value {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--text);
  text-shadow: 0 0 12px rgba(34, 255, 211, 0.35);
}
 
.stat-value.bump {
  animation: bump 0.28s ease-out;
}
 
@keyframes bump {
  0% { transform: scale(1); }
  40% {
    transform: scale(1.35);
    color: var(--cyan);
    text-shadow: 0 0 18px var(--cyan);
  }
  100% { transform: scale(1); }
}
 
/* ---------- stage ---------- */
 
.stage {
  position: relative;
  border: 1px solid var(--cyan-dim);
  border-radius: 12px;
  padding: 6px;
  background: rgba(6, 9, 20, 0.9);
  box-shadow:
    0 0 30px rgba(34, 255, 211, 0.14),
    0 0 90px rgba(124, 92, 255, 0.1),
    inset 0 0 30px rgba(34, 255, 211, 0.05);
}
 
#game {
  display: block;
  width: min(504px, calc(100vw - 60px), calc(100dvh - 260px));
  height: auto;
  aspect-ratio: 1;
  border-radius: 7px;
}
 
/* scanlines + vignette */
.stage::after {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 7px;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      to bottom,
      transparent 0 2px,
      rgba(0, 0, 0, 0.09) 2px 3px
    ),
    radial-gradient(120% 120% at 50% 50%, transparent 62%, rgba(0, 0, 0, 0.4));
}
 
/* ---------- overlay ---------- */
 
.overlay {
  position: absolute;
  inset: 6px;
  z-index: 2;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: rgba(4, 5, 12, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
 
.overlay.show {
  opacity: 1;
  pointer-events: auto;
}
 
.panel[hidden] {
  display: none; /* .panel's display would otherwise beat the UA [hidden] rule */
}
 
.panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 24px;
  text-align: center;
  animation: panel-in 0.3s cubic-bezier(0.2, 1.4, 0.4, 1);
}
 
@keyframes panel-in {
  from {
    transform: scale(0.88);
    opacity: 0;
  }
}
 
.panel-title {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: 0.3em;
  margin-right: -0.3em;
  color: #ffffff;
  text-shadow:
    0 0 8px rgba(34, 255, 211, 0.9),
    0 0 30px rgba(34, 255, 211, 0.45);
}
 
.panel-title--over {
  color: #fff;
  text-shadow:
    0 0 8px rgba(255, 46, 136, 0.95),
    0 0 30px rgba(255, 46, 136, 0.55),
    0 0 70px rgba(255, 46, 136, 0.35);
}
 
.panel-sub {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  letter-spacing: 0.06em;
}
 
.panel-hint {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
}
 
.final {
  font-size: 14px;
  letter-spacing: 0.3em;
  color: var(--muted);
}
 
.final span {
  color: var(--text);
  font-size: 26px;
  font-weight: 700;
  margin-left: 8px;
  text-shadow: 0 0 14px rgba(34, 255, 211, 0.5);
}
 
.badge {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.3em;
  padding: 6px 16px 6px 19px;
  border: 1px solid var(--pink);
  border-radius: 999px;
  color: #ffd6e8;
  background: rgba(255, 46, 136, 0.12);
  animation: badge-pulse 1.4s ease-in-out infinite;
}
 
@keyframes badge-pulse {
  0%, 100% { box-shadow: 0 0 10px var(--pink-dim); }
  50% { box-shadow: 0 0 26px rgba(255, 46, 136, 0.8); }
}
 
/* ---------- buttons ---------- */
 
.btn {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  padding: 12px 34px 12px 40px;
  color: var(--cyan);
  background: transparent;
  border: 1px solid var(--cyan);
  border-radius: 8px;
  cursor: pointer;
  box-shadow:
    0 0 14px rgba(34, 255, 211, 0.25),
    inset 0 0 14px rgba(34, 255, 211, 0.08);
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease, transform 0.1s ease;
}
 
.btn:hover {
  background: var(--cyan);
  color: #021512;
  box-shadow:
    0 0 26px rgba(34, 255, 211, 0.65),
    0 0 70px rgba(34, 255, 211, 0.3);
}
 
.btn:active {
  transform: scale(0.96);
}
 
.btn:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
}
 
.btn--hot {
  color: var(--pink);
  border-color: var(--pink);
  box-shadow:
    0 0 14px rgba(255, 46, 136, 0.3),
    inset 0 0 14px rgba(255, 46, 136, 0.08);
}
 
.btn--hot:hover {
  background: var(--pink);
  color: #1c0210;
  box-shadow:
    0 0 26px rgba(255, 46, 136, 0.7),
    0 0 70px rgba(255, 46, 136, 0.35);
}
 
/* ---------- footer ---------- */
 
.hints {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
 
.hints .dot {
  opacity: 0.5;
}
 
.hints em {
  font-style: normal;
  color: var(--cyan);
}
 
kbd {
  font-family: var(--mono);
  font-size: 10px;
  padding: 2px 7px;
  border: 1px solid rgba(215, 255, 246, 0.25);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: rgba(215, 255, 246, 0.05);
  color: var(--text);
}
 
/* ---------- misc ---------- */
 
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}
 

371 linescss

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#claude #claude-code #claude-fable-5 #css #game #graphics #html #javascript #medium #ui

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