/* bulkqr — class-driven, minimal, responsive. No framework. */
:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --border: #e4e4e7;
  --text: #18181b;
  --muted: #71717a;
  --accent: #4f46e5;
  --accent-contrast: #ffffff;
  --danger: #dc2626;
  --ok: #16a34a;
  --radius: 10px;
  --gap: 16px;
  --maxw: 960px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0e;
    --surface: #17171b;
    --border: #2a2a31;
    --text: #f4f4f5;
    --muted: #a1a1aa;
    --accent: #818cf8;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.brand { font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em; }
.brand span { color: var(--accent); }
.nav a { margin-left: 18px; color: var(--muted); font-size: 0.95rem; }

.hero { text-align: center; padding: 48px 0 24px; }
.hero h1 { font-size: 2rem; margin: 0 0 8px; letter-spacing: -0.03em; }
.hero p { color: var(--muted); margin: 0; font-size: 1.05rem; }

main { padding-bottom: 64px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.generator {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 24px;
  align-items: start;
}
@media (max-width: 720px) {
  .generator { grid-template-columns: 1fr; }
  .preview-pane { order: -1; }
}

.field { margin-bottom: var(--gap); }
.field label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; }
.field .hint { color: var(--muted); font-weight: 400; font-size: 0.8rem; }
.field label.check { display: flex; align-items: center; gap: 8px; margin-bottom: 0; cursor: pointer; }
.field label.check input { width: auto; margin: 0; }

textarea, input, select {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
}
textarea { min-height: 160px; resize: vertical; font-family: ui-monospace, monospace; font-size: 0.9rem; }
input[type="color"] { padding: 4px; height: 40px; }

.row { display: flex; gap: 12px; }
.row .field { flex: 1; }

.btn {
  display: inline-block;
  font: inherit;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 8px;
  padding: 11px 16px;
  cursor: pointer;
  width: 100%;
}
.btn:hover { border-color: var(--muted); }
.btn-primary { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }
.btn-primary:hover { filter: brightness(1.05); }
.btn + .btn { margin-top: 10px; }

.preview-pane { position: sticky; top: 20px; text-align: center; }
.preview {
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 240px;
}
.preview img { max-width: 100%; height: auto; image-rendering: pixelated; }
.preview .placeholder { color: var(--muted); font-size: 0.9rem; }

.status { margin-top: 14px; font-size: 0.9rem; min-height: 1.4em; }
.status.ok { color: var(--ok); }
.status.err { color: var(--danger); }
.status.busy { color: var(--muted); }

.notice {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
  padding: 24px 0;
  text-align: center;
}

/* Account / history table */
.table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.table th, .table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.table th { color: var(--muted); font-weight: 600; }
.badge { font-size: 0.75rem; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); }