:root {
  --bg: #f3f4f6; --panel: #fff; --line: #d9dce1; --text: #1f2328; --muted: #6b7280;
  --accent: #1d4ed8; --accent-hover: #1e40af; --warn-bg: #fff7ed; --warn: #9a3412; --ok: #166534;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Helvetica, Arial, sans-serif;
  font-size: 14px; color: var(--text);
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); }
button { font: inherit; cursor: pointer; border: 1px solid var(--line); background: #fff; border-radius: 6px; padding: 6px 12px; color: var(--text); }
button:hover { border-color: #9ca3af; }
button:disabled { opacity: .5; cursor: default; }
button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
button.primary:hover { background: var(--accent-hover); }
button.danger:hover { border-color: #dc2626; color: #dc2626; }

header.top { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
header.top h1 { font-size: 16px; margin: 0 8px 0 0; white-space: nowrap; }
header.top h1 small { color: var(--muted); font-weight: normal; margin-left: 6px; }
.docbar { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; flex: 1; }
.docbar select { font: inherit; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; min-width: 220px; max-width: 420px; }
.docbar .sep { width: 1px; height: 22px; background: var(--line); margin: 0 4px; }

main { display: grid; grid-template-columns: minmax(380px, 620px) minmax(360px, 1fr); gap: 16px; padding: 16px; align-items: start; }
.formcol { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 12px 16px 16px; }
#steps { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 8px; }
#steps .step { padding: 5px 10px; font-size: 13px; border-radius: 999px; }
#steps .step.active { background: var(--accent); color: #fff; border-color: var(--accent); }
#nav { display: flex; justify-content: space-between; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line); }

.sec { margin: 10px 0 16px; }
.sec h3 { font-size: 14px; margin: 0 0 8px; padding-bottom: 4px; border-bottom: 1px solid var(--line); }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 12px; }
.fld { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.fld > span, .chk > span { font-size: 12.5px; color: #374151; }
.fld small, .chk small { display: block; color: var(--muted); font-size: 11px; font-weight: normal; }
.fld input, .fld select { font: inherit; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; width: 100%; background: #fff; }
.fld input:focus, .fld select:focus { outline: 2px solid #bfdbfe; border-color: var(--accent); }
.fld input.money { text-align: right; font-variant-numeric: tabular-nums; }
.w2 { grid-column: span 2; }
.trio { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 8px 12px; }
.chk { display: flex; gap: 6px; align-items: flex-start; padding: 4px 0; }
.chk input { margin-top: 3px; }
.radio .opts, .fld .opts { display: flex; flex-wrap: wrap; gap: 4px 14px; padding: 4px 0; }
.radio .opts label { display: inline-flex; gap: 4px; align-items: center; white-space: nowrap; }
.chk > span { white-space: nowrap; }
.chk.w2 > span, fieldset .chk > span { white-space: normal; }
fieldset.party { grid-column: span 2; border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px 10px; margin: 0; }
fieldset.party legend { font-size: 12.5px; color: var(--muted); padding: 0 4px; }
.note { font-size: 12px; color: var(--muted); margin: 0 0 8px; }
ul.warn { background: var(--warn-bg); color: var(--warn); border-radius: 6px; padding: 8px 8px 8px 24px; margin: 0 0 8px; }
p.warn { color: var(--warn); }
.ok { color: var(--ok); }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin: 8px 0; }
.status { font-size: 12px; color: var(--muted); min-height: 1em; }

.previewcol { position: sticky; top: 62px; max-height: calc(100vh - 78px); display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--line); border-radius: 8px; }
.previewcol .pvhead { display: flex; align-items: center; gap: 10px; padding: 8px 12px; border-bottom: 1px solid var(--line); font-size: 13px; }
.previewcol .pvhead .grow { flex: 1; color: var(--muted); }
#pages { overflow: auto; padding: 12px; background: #e5e7eb; border-radius: 0 0 8px 8px; flex: 1; }
#pages .page { margin: 0 auto 14px; position: relative; }
#pages .page canvas { display: block; margin: 0 auto; background: #fff; box-shadow: 0 1px 4px rgba(0,0,0,.25); }
#pages .pnum { font-size: 11px; color: var(--muted); text-align: center; margin-bottom: 3px; }

@media (max-width: 1000px) {
  main { grid-template-columns: 1fr; }
  .previewcol { position: static; max-height: 80vh; }
}
@media (max-width: 520px) {
  .grid { grid-template-columns: 1fr; }
  .w2, fieldset.party { grid-column: span 1; }
  main { padding: 8px; }
}
.fld textarea { font: inherit; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; width: 100%; background: #fff; resize: vertical; line-height: 1.4; }
.fld textarea:focus { outline: 2px solid #bfdbfe; border-color: var(--accent); }
.count { color: var(--muted); font-size: 11px; }
.count.over { color: var(--warn); font-weight: 600; }