:root {
  --bg: #faf6f2;
  --card: #ffffff;
  --ink: #241d1a;
  --muted: #8d7f78;
  --line: #ece1d9;
  --brand: #b8543f;
  --brand-dark: #9c4331;
  --brand-soft: #f8e7e0;
  --ok: #2f7d5b;
  --ok-soft: #e4f3ec;
  --warn: #a86400;
  --warn-soft: #fdf2df;
  --danger: #c0392b;
  --danger-soft: #fbe9e7;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(60, 40, 30, 0.05), 0 6px 18px rgba(60, 40, 30, 0.05);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.55;
  padding-bottom: 120px;
}

a { color: var(--brand); text-decoration: none; }

.wrap { width: 100%; max-width: 620px; margin: 0 auto; padding: 0 14px; }

/* ---------- header ---------- */
.top {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(250, 246, 242, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.top .wrap { padding-top: 10px; }

.brand { display: flex; align-items: center; gap: 10px; }

.logo {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  background: var(--brand-soft);
  border-radius: 12px;
  font-size: 20px;
}

.title { font-weight: 700; font-size: 17px; letter-spacing: 0.2px; }
.sub { font-size: 12px; color: var(--muted); margin-top: -2px; }

.tabs { display: flex; gap: 6px; margin: 10px 0 8px; }

.tabs a {
  flex: 1;
  text-align: center;
  padding: 8px 0;
  border-radius: 11px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  background: transparent;
  border: 1px solid transparent;
}

.tabs a.active {
  color: var(--brand);
  background: #fff;
  border-color: var(--line);
  box-shadow: var(--shadow);
}

/* ---------- cards ---------- */
main { padding-top: 14px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}

.card h2 {
  font-size: 15px;
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.card-head h2 { margin: 0; }

.row-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.row-no {
  font-size: 12px;
  font-weight: 700;
  color: var(--brand);
  background: var(--brand-soft);
  padding: 3px 9px;
  border-radius: 999px;
}

.icon-btn {
  border: 0;
  background: #f6efea;
  color: var(--muted);
  width: 30px; height: 30px;
  border-radius: 9px;
  font-size: 14px;
  cursor: pointer;
}
.icon-btn:active { background: var(--brand-soft); color: var(--brand); }

/* ---------- fields ---------- */
.field { display: block; margin-bottom: 11px; }
.field:last-child { margin-bottom: 0; }

.label {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 600;
  color: #6f625c;
  margin-bottom: 5px;
}
.label em { font-style: normal; font-weight: 400; color: var(--muted); font-size: 11.5px; }

input[type="text"],
input[type="date"],
input[type="search"],
input:not([type]),
select,
textarea {
  width: 100%;
  padding: 12px 12px;
  font-size: 16px;
  font-family: inherit;
  color: var(--ink);
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

input:focus, select:focus, textarea:focus { border-color: var(--brand); }

input::placeholder { color: #b9aca5; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.suffix { position: relative; }
.suffix input { padding-right: 38px; }
.suffix span {
  position: absolute;
  right: 12px; top: 50%;
  transform: translateY(-50%);
  font-size: 13px;
  color: var(--muted);
  pointer-events: none;
}

.product-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 12px;
  font-size: 16px;
  font-family: inherit;
  color: #b9aca5;
  background: #fff;
  border: 1.5px dashed var(--line);
  border-radius: 12px;
  cursor: pointer;
  text-align: left;
}
.product-btn.has { color: var(--ink); border-style: solid; font-weight: 600; }
.product-btn .caret { color: var(--muted); font-size: 12px; }

/* ---------- segmented ---------- */
.seg {
  display: flex;
  gap: 4px;
  background: #f4ece7;
  padding: 4px;
  border-radius: 12px;
}
.seg button {
  flex: 1;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 0;
  border-radius: 9px;
  cursor: pointer;
}
.seg button.on {
  background: #fff;
  color: var(--brand);
  box-shadow: 0 1px 3px rgba(60, 40, 30, 0.12);
}

.paid-wrap { margin-top: 8px; }

/* ---------- row summary ---------- */
.row-sum {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin-top: 11px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
}
.row-sum:empty { display: none; }

.sum-amt { font-weight: 700; color: var(--ink); }
.sum-due { color: var(--danger); font-weight: 700; }
.sum-due.ok { color: var(--ok); }
.note { color: var(--muted); font-size: 12px; }

.chip {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--brand);
  font-family: inherit;
  font-size: 12px;
  padding: 4px 9px;
  border-radius: 999px;
  cursor: pointer;
}

/* ---------- badges ---------- */
.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
}
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.out { background: #f0ece9; color: #8d7f78; }
.badge.over { background: var(--danger-soft); color: var(--danger); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  padding: 11px 16px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: var(--brand-soft);
  color: var(--brand);
  cursor: pointer;
}
.btn.primary { background: var(--brand); color: #fff; }
.btn.primary:active { background: var(--brand-dark); }
.btn.ghost { background: #fff; border-color: var(--line); color: #6f625c; }
.btn.small { font-size: 13px; padding: 7px 12px; border-radius: 10px; }
.btn.block { width: 100%; }
.btn.big { padding: 15px 16px; font-size: 16px; border-radius: 14px; }
.btn[disabled], .btn.disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* ---------- preview ---------- */
.preview {
  margin: 0;
  padding: 13px;
  background: #fbf7f3;
  border: 1px dashed #e2d3c8;
  border-radius: 12px;
  font-family: "SF Mono", Menlo, Consolas, "Courier New", monospace;
  font-size: 13.5px;
  line-height: 1.75;
  white-space: pre-wrap;
  word-break: break-word;
  color: #3a302b;
  min-height: 52px;
  user-select: all;
  -webkit-user-select: all;
}
.preview.small { font-size: 13px; min-height: 0; }

.warn { margin-top: 9px; display: grid; gap: 5px; }
.warn-line {
  font-size: 12.5px;
  color: var(--warn);
  background: var(--warn-soft);
  border-radius: 9px;
  padding: 7px 10px;
}

/* ---------- bottom bar ---------- */
.bottombar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 50;
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  background: linear-gradient(to top, rgba(250, 246, 242, 0.98) 60%, rgba(250, 246, 242, 0));
  display: flex;
  gap: 8px;
  max-width: 620px;
  margin: 0 auto;
}
.bottombar .btn { flex: 1; }
.bottombar .icon-only {
  flex: 0 0 54px;
  padding: 0;
  font-size: 19px;
}

/* ---------- sheet / picker ---------- */
.sheet {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(35, 24, 20, 0.42);
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.sheet[hidden] { display: none; }

.sheet-panel {
  width: 100%;
  max-width: 620px;
  max-height: 84vh;
  background: var(--bg);
  border-radius: 20px 20px 0 0;
  display: flex;
  flex-direction: column;
  padding: 12px 14px calc(12px + env(safe-area-inset-bottom));
  animation: up 0.18s ease-out;
}
@keyframes up { from { transform: translateY(24px); opacity: 0.6; } }

.sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2px 2px 10px;
}
.sheet-head b { font-size: 15px; }
.sheet-head button {
  border: 0; background: #efe7e1; color: #6f625c;
  font-family: inherit; font-size: 13px; font-weight: 600;
  padding: 6px 12px; border-radius: 999px; cursor: pointer;
}

.sheet-panel input[type="search"] { margin-bottom: 10px; background: #fff; }

.picker-list {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 8px;
}

.picker-series {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  padding: 12px 4px 6px;
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.picker-series span { font-weight: 400; font-size: 11px; }

.picker-item {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 12px;
  margin-bottom: 6px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
}
.picker-item:active { background: var(--brand-soft); border-color: #eccfc4; }
.pi-main { display: flex; flex-direction: column; }
.pi-main b { font-size: 15px; color: var(--ink); }
.pi-main small { font-size: 12px; color: var(--muted); }

.empty { text-align: center; color: var(--muted); font-size: 14px; padding: 30px 0; }

/* ---------- toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 92px;
  transform: translateX(-50%) translateY(8px);
  z-index: 200;
  background: #2b2320;
  color: #fff;
  font-size: 13.5px;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s, transform 0.18s;
  max-width: 86vw;
  text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- fix block ---------- */
.fix-block { padding: 12px 0; border-top: 1px dashed var(--line); }
.fix-block:first-of-type { border-top: 0; padding-top: 2px; }
.fix-title { font-size: 13.5px; font-weight: 700; margin-bottom: 8px; }
.fix-out { display: flex; gap: 8px; align-items: center; margin-top: 8px; }
.fix-out .preview { flex: 1; }

details.more { margin-top: 4px; }
details.more summary {
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
  padding: 6px 0;
}

/* ---------- rules / docs ---------- */
.doc h1 { font-size: 22px; margin: 6px 0 4px; }
.doc h2 {
  font-size: 18px;
  margin: 26px 0 10px;
  padding-top: 6px;
  display: block;
}
.doc h3 { font-size: 15px; margin: 18px 0 8px; color: #4a3d37; }
.doc p { margin: 8px 0; font-size: 14.5px; color: #3f3530; }
.doc ul, .doc ol { padding-left: 22px; margin: 8px 0; font-size: 14.5px; }
.doc li { margin: 4px 0; }
.doc code {
  background: #f3ebe5;
  border-radius: 6px;
  padding: 1px 6px;
  font-size: 13px;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  color: #8a3f2d;
}
.doc pre {
  background: #2b2320;
  color: #f6eee9;
  border-radius: 12px;
  padding: 13px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.7;
  font-family: "SF Mono", Menlo, Consolas, monospace;
}
.doc pre code { background: none; color: inherit; padding: 0; }

.doc blockquote {
  margin: 10px 0;
  padding: 9px 12px;
  border-left: 3px solid #e3c9bd;
  background: #fbf4f0;
  border-radius: 0 10px 10px 0;
  color: #6f625c;
  font-size: 14px;
}
.doc blockquote p { margin: 0; }

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 10px 0;
  border: 1px solid var(--line);
  border-radius: 12px;
}
.doc table {
  border-collapse: collapse;
  width: 100%;
  font-size: 13.5px;
  min-width: 420px;
  background: #fff;
}
.doc th, .doc td {
  padding: 9px 11px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.doc th { background: #f8f1ec; font-weight: 700; white-space: nowrap; }
.doc tr:last-child td { border-bottom: 0; }
.doc td.num, .doc th.num { text-align: right; font-variant-numeric: tabular-nums; }

.doc .bad-table th { color: var(--danger); }
.doc .bad-table td:first-child { color: #8a3f2d; }

.callout {
  background: var(--brand-soft);
  border: 1px solid #f0d6ca;
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 13.5px;
  color: #7c3f2e;
  margin: 12px 0;
}
.callout b { color: var(--brand-dark); }

.section-anchor { scroll-margin-top: 120px; }

/* ---------- products page ---------- */
.filters { display: flex; gap: 8px; margin-bottom: 10px; }
.filters .chip { font-size: 13px; padding: 7px 14px; border-radius: 999px; background: #fff; }
.filters .chip.on { background: var(--brand); border-color: var(--brand); color: #fff; }

.prod-group { margin-bottom: 14px; }
.prod-group h2 { margin-bottom: 8px; }

.prod-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 6px;
}
.prod-item .pi-main b { font-size: 15px; }
.prod-item .pi-main small { font-size: 12px; color: var(--muted); }
.prod-item .right { display: flex; align-items: center; gap: 8px; }
.copy-mini {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--brand);
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 8px;
  cursor: pointer;
}
.copy-mini:active { background: var(--brand-soft); }

.footer {
  text-align: center;
  font-size: 12px;
  color: #a99a92;
  padding: 8px 0 4px;
  line-height: 1.8;
}
.footer a { color: #a99a92; text-decoration: underline; }

@media (min-width: 640px) {
  body { font-size: 16px; }
  .bottombar { left: 50%; transform: translateX(-50%); width: 620px; }
}