* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #f5f7fa; --card: #ffffff; --line: #e6e9ef;
  --ink: #1c2333; --sub: #6b7280; --accent: #0e7dff; --accent-dark: #0b5fd0;
  --ok: #12a150; --warn-bg: #fff7e0; --warn-ink: #8a5a00;
}
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--ink); line-height: 1.5;
}
.top { background: linear-gradient(135deg, #0b5fd0, #0e7dff 60%, #35a0ff); color: #fff; }
.top-inner { max-width: 680px; margin: 0 auto; padding: 18px 16px 14px; }
.top h1 { font-size: 24px; letter-spacing: 1px; }
.top .beta { font-size: 11px; background: rgba(255,255,255,.25); border-radius: 6px; padding: 1px 6px; vertical-align: 2px; letter-spacing: 0; }
.top .tag { font-size: 12px; opacity: .92; margin-top: 2px; }

.tabs {
  position: sticky; top: 0; z-index: 5; display: flex; gap: 4px;
  max-width: 680px; margin: 0 auto; padding: 8px 12px 0;
  background: rgba(245,247,250,.96); backdrop-filter: blur(6px);
}
.tab {
  flex: 1; border: none; background: transparent; color: var(--sub);
  padding: 10px 0 9px; font-size: 15px; border-bottom: 2px solid transparent; cursor: pointer;
}
.tab.on { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

main { max-width: 680px; margin: 0 auto; padding: 12px 12px 40px; }
.tabpane { display: none; }
.tabpane.on { display: block; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 16px; margin-bottom: 12px; box-shadow: 0 1px 2px rgba(16,24,40,.04);
}
.card h2 { font-size: 16px; margin-bottom: 10px; }
.hint, .tiny { color: var(--sub); font-size: 12px; }
.empty { color: var(--sub); font-size: 13px; padding: 8px 0; }

.mode { display: flex; gap: 10px; margin-bottom: 14px; }
.chip { display: flex; align-items: center; gap: 6px; font-size: 14px; cursor: pointer;
  border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; }
.chip input { accent-color: var(--accent); }

.row { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.row label { width: 100%; font-size: 13px; color: var(--sub); }
.row input[type="number"], .row select, .row textarea {
  flex: 1 1 100%; border: 1px solid var(--line); border-radius: 10px;
  padding: 11px 12px; font-size: 16px; background: #fff; color: var(--ink);
  outline: none; -moz-appearance: textfield; appearance: textfield;
}
.row input[type="number"]:focus, .row select:focus, .row textarea:focus { border-color: var(--accent); }
.row input[type="number"]::-webkit-outer-spin-button, .row input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.row textarea { font-family: ui-monospace, Consolas, Menlo, monospace; font-size: 13px; resize: vertical; }
.unit { font-style: normal; color: var(--sub); font-size: 13px; margin-left: 4px; }
.unit.hint { cursor: help; border: 1px solid var(--line); border-radius: 50%; width: 16px; height: 16px; text-align: center; line-height: 14px; font-size: 11px; }

details#adv { border: 1px dashed var(--line); border-radius: 10px; padding: 10px 12px; margin-bottom: 14px; }
details#adv summary { cursor: pointer; font-size: 13px; color: var(--sub); }
.adv-inner { margin-top: 12px; }
.adv-actions { display: flex; gap: 8px; margin-top: 4px; }

button { font-family: inherit; cursor: pointer; }
button.primary {
  width: 100%; border: none; border-radius: 12px; padding: 14px;
  background: var(--accent); color: #fff; font-size: 16px; font-weight: 600;
}
button.primary:active { background: var(--accent-dark); }
button.ghost {
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  border-radius: 10px; padding: 10px 14px; font-size: 14px; flex: 1;
}
button.ghost:active { background: #f0f3f8; }
button.ghost.danger { color: #d03030; }
button.ghost.sm { flex: 0 1 auto; padding: 7px 12px; font-size: 13px; }
.actions { display: flex; gap: 8px; margin-top: 12px; }

.bigrow { display: flex; gap: 12px; margin: 6px 0 12px; }
.big {
  flex: 1; background: #f0f6ff; border: 1px solid #d8e8ff; border-radius: 12px;
  padding: 12px; text-align: center;
}
.big-num { display: block; font-size: 24px; font-weight: 700; color: var(--accent-dark); }
.big-label { font-size: 12px; color: var(--sub); }
.bepline { font-size: 14px; margin-bottom: 10px; }

.breakdown { list-style: none; border-top: 1px dashed var(--line); }
.breakdown li {
  display: flex; justify-content: space-between; font-size: 13.5px;
  padding: 7px 2px; border-bottom: 1px dashed var(--line);
}
.breakdown li b { font-weight: 600; }
.breakdown li.total { font-weight: 700; background: #f7fafc; padding: 9px 6px; border-radius: 8px; }

.warn {
  background: var(--warn-bg); color: var(--warn-ink); font-size: 12px;
  border-radius: 8px; padding: 8px 10px; margin-top: 10px;
}
.sharebox { margin-top: 12px; }
.sharebox pre {
  background: #f4f6f9; border: 1px solid var(--line); border-radius: 10px;
  padding: 10px; font-size: 12.5px; white-space: pre-wrap; word-break: break-all;
  font-family: ui-monospace, Consolas, Menlo, monospace; max-height: 320px; overflow: auto;
}
.sharebox button { margin-top: 8px; }
.sharebox img {
  display: block; max-width: 100%; height: auto; margin: 0 auto;
  border: 1px solid var(--line); border-radius: 12px; background: #fff;
}

.tablewrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--sub); font-weight: 600; }
td.num { text-align: right; font-variant-numeric: tabular-nums; }

footer { max-width: 680px; margin: 0 auto; padding: 10px 16px 30px; color: var(--sub); font-size: 11.5px; text-align: center; }
footer p + p { margin-top: 4px; }

@media (min-width: 700px) {
  .row { display: grid; grid-template-columns: 210px 1fr auto; align-items: center; }
  .row label { width: auto; }
  .row input[type="number"], .row select { flex: none; grid-column: 2; }
  .unit { grid-column: 3; }
  .row textarea { grid-column: 2 / 4; }
}