:root {
  --teal: #0f766e; --teal-dark: #115e59; --bg: #f8fafc; --card: #fff;
  --text: #0f172a; --muted: #64748b; --red: #dc2626; --green: #16a34a;
  --border: #e2e8f0; --radius: 12px;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, "Noto Sans TC", sans-serif;
  background: var(--bg); color: var(--text); }
#topbar { display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px; background: var(--teal); color: #fff;
  position: sticky; top: 0; z-index: 10; }
#topbar h1 { margin: 0; font-size: 18px; }
#nav a { color: #ccfbf1; margin-left: 14px; text-decoration: none; font-size: 14px; }
main { max-width: 560px; margin: 0 auto; padding: 16px 12px 90px; }
.card { background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px; margin-bottom: 12px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.spread { justify-content: space-between; }
label { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 4px; }
input, select, textarea { width: 100%; padding: 10px; font-size: 16px;
  border: 1px solid var(--border); border-radius: 8px; background: #fff; }
input[type="checkbox"] { width: auto; }
button { padding: 12px 16px; font-size: 16px; border: 0; border-radius: 10px;
  background: var(--teal); color: #fff; cursor: pointer; }
button:active { background: var(--teal-dark); }
button.ghost { background: #f1f5f9; color: var(--text); }
button.small { padding: 6px 10px; font-size: 13px; }
button.danger { background: var(--red); }
.chip { display: inline-block; padding: 4px 10px; border-radius: 999px;
  border: 1px solid var(--border); font-size: 13px; cursor: pointer; user-select: none; }
.chip.on { background: var(--teal); color: #fff; border-color: var(--teal); }
.muted { color: var(--muted); font-size: 13px; }
.pos { color: var(--green); font-weight: 600; }
.neg { color: var(--red); font-weight: 600; }
.amount { font-variant-numeric: tabular-nums; }
.exp { display: flex; justify-content: space-between; gap: 8px; padding: 10px 0;
  border-bottom: 1px solid var(--border); cursor: pointer; }
.exp:last-child { border-bottom: 0; }
.daehead { margin: 14px 0 4px; font-size: 13px; color: var(--muted); font-weight: 600; }
.warn { background: #fef9c3; border: 1px solid #fde047; border-radius: 8px;
  padding: 8px 10px; font-size: 13px; margin-top: 8px; }
.fab { position: fixed; right: 18px; bottom: 24px; width: 58px; height: 58px;
  border-radius: 50%; font-size: 28px; box-shadow: 0 4px 14px rgb(0 0 0 / .25); }
.itemrow { display: grid; grid-template-columns: 1fr 90px; gap: 6px; margin-bottom: 6px; }
.err { color: var(--red); font-size: 14px; margin-top: 8px; }