Build a Conway's Game of Life explorer as a static page in this directory: index.html, …

claude-codeclaude-opus-4-8 · 29 steps · 5m 29s · 5 filessession d7727762-24d@patrick-toulme

Build a Conway's Game of Life explorer as a static page in this directory: index.html, style.css, life.js. Canvas grid with play/pause/step/clear, speed slider, drag-to-draw cells, a library of classic patterns (glider, glider gun, pulsar) placeable by click, wrap-around edges toggle, generation counter, dark theme, and tests.html + tests.js exercising the next-generation rules. Run the tests headless with node and fix what fails.

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step 09 / 29

style.csschange 1/1

:root {
  --bg: #0a0e14;
  --panel: #11161f;
  --panel-2: #161c27;
  --border: #232b38;
  --text: #d7dde7;
  --text-dim: #8a94a6;
  --accent: #58a6ff;
  --accent-strong: #388bfd;
 
  /* Canvas colours (read by life.js) */
  --grid-bg: #0d1117;
  --grid-line: #1b2430;
  --cell: #3fb950;
  --cell-preview: rgba(88, 166, 255, 0.45);
}
 
* {
  box-sizing: border-box;
}
 
html,
body {
  margin: 0;
  padding: 0;
}
 
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
 
.app-header {
  text-align: center;
  padding: 28px 16px 8px;
}
 
.app-header h1 {
  margin: 0;
  font-size: 1.7rem;
  letter-spacing: -0.01em;
}
 
.tagline {
  margin: 4px 0 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}
 
.app {
  max-width: 1140px;
  margin: 0 auto;
  padding: 16px;
}
 
/* --- Toolbar ------------------------------------------------------------- */
.toolbar,
.patterns {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 14px;
}
 
.control-group {
  display: flex;
  align-items: center;
  gap: 8px;
}
 
.control-group.stats {
  margin-left: auto;
}
 
/* --- Buttons ------------------------------------------------------------- */
.btn {
  appearance: none;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  transition: background 0.15s ease, border-color 0.15s ease,
    transform 0.05s ease;
}
 
.btn:hover {
  background: #1e2634;
  border-color: #303b4d;
}
 
.btn:active {
  transform: translateY(1px);
}
 
.btn.primary {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: #fff;
}
 
.btn.primary:hover {
  background: var(--accent);
  border-color: var(--accent);
}
 
.btn.active {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}
 
.btn.primary.active {
  color: #fff;
}
 
/* --- Slider & toggle ----------------------------------------------------- */
.slider,
.toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-dim);
  user-select: none;
}
 
.slider input[type="range"] {
  accent-color: var(--accent);
  width: 150px;
}
 
.slider .value {
  color: var(--text);
  font-variant-numeric: tabular-nums;
  min-width: 62px;
}
 
.toggle input {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
}
 
/* --- Stats --------------------------------------------------------------- */
.stat {
  font-size: 0.9rem;
  color: var(--text-dim);
}
 
.stat strong {
  color: var(--text);
  font-variant-numeric: tabular-nums;
  margin-left: 4px;
}
 
/* --- Patterns row -------------------------------------------------------- */
.patterns {
  margin-top: -2px;
}
 
.patterns-label {
  font-size: 0.85rem;
  color: var(--text-dim);
}
 
.pattern-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
 
.divider {
  width: 1px;
  align-self: stretch;
  background: var(--border);
}
 
.hint {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-left: auto;
}
 
/* --- Canvas -------------------------------------------------------------- */
.canvas-wrap {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  overflow: auto;
}
 
#grid {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 6px;
  cursor: crosshair;
  image-rendering: pixelated;
}
 
#grid.placing {
  cursor: copy;
}
 
/* --- Footer -------------------------------------------------------------- */
.app-footer {
  margin-top: 14px;
  color: var(--text-dim);
  font-size: 0.85rem;
  text-align: center;
}
 
.app-footer a {
  color: var(--accent);
  text-decoration: none;
}
 
.app-footer a:hover {
  text-decoration: underline;
}
 

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