:root {
  --bg: #f7f7fb;
  --card: #ffffff;
  --text: #222;
  --muted: #666;
  --primary: #2563eb;
  --primary-ink: #fff;
  --danger: #dc2626;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Microsoft Yahei", "PingFang SC", sans-serif;
  color: var(--text);
  background: var(--bg);
}

.header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 16px;
}
.header h1 { margin: 0 0 8px; font-size: 20px; }
.tabs { display: flex; gap: 8px; }
.tab {
  padding: 8px 12px;
  background: #f3f4f6;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}
.tab.active { background: #e5e7eb; }

.container { max-width: 1100px; margin: 24px auto; padding: 0 16px; }
.section.hidden { display: none; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.grid label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
input, textarea, select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}
textarea { resize: vertical; }

.items { margin-top: 12px; }
.items-head, .items-row {
  display: grid;
  grid-template-columns: 2.2fr 1.6fr 1fr 0.8fr 1.1fr 1.1fr 0.8fr;
  gap: 8px;
  align-items: center;
}
.items-head { font-weight: 600; color: var(--muted); padding: 8px 0; }
.items-body { display: flex; flex-direction: column; gap: 8px; }
.items-row input { width: 100%; }

.totals { display: flex; gap: 24px; padding-top: 10px; font-weight: 600; }
.actions { display: flex; gap: 8px; margin-top: 12px; }
.btn {
  padding: 8px 14px;
  border: 1px solid var(--border);
  background: #f9fafb;
  border-radius: 8px;
  cursor: pointer;
}
.btn.primary { background: var(--primary); color: var(--primary-ink); border-color: var(--primary); }
.btn.secondary { background: #eef2ff; border-color: #c7d2fe; }
.btn.danger { background: #fee2e2; border-color: #fecaca; color: #991b1b; }

.hint { color: var(--muted); font-size: 12px; }
.footer { text-align: center; color: var(--muted); padding: 24px; }

.results { display: flex; flex-direction: column; gap: 12px; }
.result-card { border: 1px dashed var(--border); border-radius: 8px; padding: 12px; }
.result-head { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center; }
.result-items { margin-top: 8px; }
.result-items table { width: 100%; border-collapse: collapse; }
.result-items th, .result-items td { border: 1px solid var(--border); padding: 6px 8px; text-align: left; }

.stats { display: grid; grid-template-columns: 1.2fr 1fr; gap: 12px; }
.stats .panel { border: 1px solid var(--border); border-radius: 8px; padding: 10px; }
.stats table { width: 100%; border-collapse: collapse; }
.stats th, .stats td { border: 1px solid var(--border); padding: 6px 8px; text-align: left; }

.system-only { color: #7c3aed; }
.no-print { /* runtime hidden in print by media rule */ }
.print-area { display: none; background: #fff; padding: 16px; }
.print-title { text-align: center; font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.print-meta { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 8px; }
.print-table { width: 100%; border-collapse: collapse; }
.print-table th, .print-table td { border: 1px solid #000; padding: 6px; }
.print-footer { margin-top: 8px; display: flex; justify-content: space-between; }

@media print {
  .no-print, .header, .footer, .card, .tabs, .actions, .hint { display: none !important; }
  body { background: #fff; }
  .container { margin: 0; padding: 0; }
  .section { display: none !important; }
  #entry-section { display: block !important; }
  .print-area { display: block !important; }
  /* 在打印中隐藏系统价格列 */
  .system-only { display: none !important; }
}