/* pattern.css — the 4×4 pattern pad (pattern.js). Uses the page's colour tokens. */
.pattern { width: 100%; }
.pattern-grid {
  display: block;
  width: 100%;
  max-width: 300px;
  aspect-ratio: 1;
  margin: 0 auto;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  touch-action: none;                 /* drawing, not scrolling */
  cursor: crosshair;
  user-select: none;
  -webkit-user-select: none;
}
.pattern-dot { fill: var(--text2); transition: fill 0.12s; }
.pattern-halo { fill: transparent; transition: fill 0.12s; }
.pattern .on .pattern-dot { fill: var(--accent); }
.pattern .on .pattern-halo { fill: color-mix(in srgb, var(--accent) 16%, transparent); }
.pattern-path, .pattern-live {
  fill: none;
  stroke: var(--accent);
  stroke-width: 9;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.75;
}
.pattern-live { opacity: 0.4; }
.pattern-label {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 600;
  fill: var(--muted);
  visibility: hidden;
}
.pattern.typing .pattern-label { visibility: visible; }

.pattern.ok .pattern-path { stroke: var(--status-complete); }
.pattern.ok .on .pattern-dot { fill: var(--status-complete); }
.pattern.ok .on .pattern-halo { fill: color-mix(in srgb, var(--status-complete) 16%, transparent); }
.pattern.error .pattern-path { stroke: var(--accent2); }
.pattern.error .on .pattern-dot { fill: var(--accent2); }
.pattern.error .on .pattern-halo { fill: color-mix(in srgb, var(--accent2) 16%, transparent); }
.pattern.error .pattern-grid { animation: pattern-shake 0.3s; }
@keyframes pattern-shake {
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.pattern-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  max-width: 300px;
  margin: 8px auto 0;
  font-size: 11px;
  color: var(--muted);
}
.pattern-type-btn {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  background: none;
  border: none;
  padding: 4px 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.pattern-typed { max-width: 300px; margin: 10px auto 0; }
.pattern-typed[hidden] { display: none; }
.pattern-typed input { letter-spacing: 0.2em; }
.pattern-hint { font-size: 11px; color: var(--muted); margin-top: 6px; line-height: 1.5; }

@media (prefers-reduced-motion: reduce) {
  .pattern.error .pattern-grid { animation: none; }
}