/* QR code builder styles; shared theme lives in ../shared/tools.css */
.page-title { margin: 0; font-size: 1.6rem; font-weight: 800; letter-spacing: -0.02em; }

.qr-layout { width: 100%; max-width: 1100px; margin: 0 auto; padding: 8px 16px 48px; display: grid; grid-template-columns: 1fr 400px; gap: 20px; align-items: start; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 22px; box-shadow: var(--shadow); }
form.panel { display: grid; gap: 18px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.row3 { display: grid; grid-template-columns: 1fr 1fr 1.4fr; gap: 14px; }
.field textarea { min-height: 96px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9rem; }
.field input[type="color"] { height: 42px; padding: 4px; cursor: pointer; }
.hint { color: var(--muted); font-size: .78rem; }
.presets { display: flex; gap: 6px; flex-wrap: wrap; }
.presets button { border: 1px solid var(--line); background: var(--bg); border-radius: 8px; padding: .25rem .55rem; font-size: .78rem; font-weight: 700; color: var(--muted); cursor: pointer; }
.presets button:hover, .presets button.active { border-color: var(--blue-400); color: var(--blue-700); background: var(--blue-50); }
.warn { margin: 0; padding: 10px 12px; border-radius: 10px; background: color-mix(in srgb, var(--medium) 14%, transparent); color: var(--medium); font-weight: 600; font-size: .86rem; }

.preview { position: sticky; top: 76px; text-align: center; }
.canvas-wrap { position: relative; aspect-ratio: 1; display: grid; place-items: center; border-radius: 14px; padding: 14px;
  background: repeating-conic-gradient(color-mix(in srgb, var(--muted) 12%, transparent) 0 25%, transparent 0 50%) 50% / 20px 20px; }
#canvas { width: 100%; height: auto; max-width: 340px; image-rendering: pixelated; box-shadow: 0 6px 20px rgba(11, 23, 51, .12); }
.canvas-wrap .empty, .canvas-wrap .error { position: absolute; inset: 14px; display: grid; place-items: center; margin: 0; padding: 20px; border-radius: 10px; background: var(--card); font-weight: 600; }
.canvas-wrap .empty { color: var(--muted); }
.canvas-wrap .error { color: var(--danger); }
.info { margin: 12px 0 0; color: var(--muted); font-size: .82rem; font-weight: 600; }
.downloads { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 14px; }
.downloads .btn:disabled { opacity: .5; cursor: not-allowed; }
.credit { margin: 16px 0 0; color: var(--muted); font-size: .78rem; }

@media (max-width: 860px) {
  .qr-layout { grid-template-columns: 1fr; }
  .preview { position: static; order: -1; }
}
@media (max-width: 640px) {
  .page-title { font-size: 1.3rem; }
  .row2, .row3 { grid-template-columns: 1fr 1fr; }
  .row3 .field:last-child { grid-column: 1 / -1; }
}