:root {
  --bg: #f6f7f9; --card: #ffffff; --ink: #1b1f24; --muted: #5d6670; --line: #d9dee4; --brand: #1f3864;
  --green: #2e7d32; --amber: #b26a00; --red: #c62828; --demo: #7b1fa2;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111418; --card: #1a1f25; --ink: #e8ebef; --muted: #9aa4ae; --line: #2c333b; --brand: #8fb0e8;
    --green: #66bb6a; --amber: #ffb74d; --red: #ef5350; --demo: #ce93d8; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--ink);
  padding-bottom: env(safe-area-inset-bottom); }
.top { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 2; }
.top h1 { font-size: 20px; margin: 0; }
.demo { background: var(--demo); color: #fff; font-weight: 700; font-size: 12px; padding: 2px 8px; border-radius: 10px; }
.demo-banner { background: var(--demo); color: #fff; padding: 8px 16px; font-size: 14px; }
.badge { margin-left: auto; font-size: 13px; padding: 3px 10px; border-radius: 12px; border: 1px solid var(--line); }
.badge.offline { border-color: var(--amber); color: var(--amber); }
.badge.online { border-color: var(--green); color: var(--green); }
.update { background: var(--brand); color: #fff; padding: 8px 16px; display: flex; gap: 8px; align-items: center; }
main, footer { padding: 0 16px; max-width: 640px; margin: 0 auto; }
.summary { margin: 12px 0; }
.summary p { margin: 4px 0; }
.big { font-size: 22px; font-weight: 600; }
.muted { color: var(--muted); font-size: 14px; }
.add { display: block; width: 100%; padding: 16px; font-size: 18px; font-weight: 600; border: 0; border-radius: 12px;
  background: var(--brand); color: #fff; margin: 8px 0 16px; }
.cats, .entries { list-style: none; padding: 0; margin: 0; }
.cat { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin-bottom: 8px; }
.cat-head { display: flex; gap: 8px; align-items: baseline; }
.cat-name { font-weight: 600; }
.cat-left { margin-left: auto; }
.bar { height: 6px; background: var(--line); border-radius: 3px; margin: 6px 0 4px; overflow: hidden; }
.fill { height: 100%; background: var(--brand); }
.flag { font-size: 12px; font-weight: 700; min-width: 0; }
.flag.green { color: var(--green); } .flag.amber { color: var(--amber); } .flag.red { color: var(--red); }
h2 { font-size: 17px; margin: 20px 0 8px; }
.entry { display: flex; gap: 8px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 8px 10px; margin-bottom: 6px; }
.entry-info { display: flex; flex-wrap: wrap; gap: 4px 10px; flex: 1; }
.entry-amt { font-weight: 600; }
.entry-note { flex-basis: 100%; }
.pending { font-size: 12px; color: var(--amber); }
button { font: inherit; padding: 8px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--ink); }
button.small { padding: 4px 8px; font-size: 14px; }
button.primary { background: var(--brand); color: #fff; border-color: var(--brand); }
button.danger { color: var(--red); }
footer { margin-top: 24px; padding-bottom: 32px; }
.tools { display: flex; flex-wrap: wrap; gap: 8px; }
dialog { border: 0; border-radius: 14px; padding: 16px; width: min(96vw, 520px); background: var(--card); color: var(--ink); }
dialog::backdrop { background: rgba(0, 0, 0, 0.45); }
fieldset { border: 0; padding: 0; margin: 0 0 12px; display: flex; flex-wrap: wrap; gap: 6px; }
legend { font-weight: 600; margin-bottom: 6px; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span { display: inline-block; padding: 8px 12px; border: 1px solid var(--line); border-radius: 18px; }
.chip input:checked + span { background: var(--brand); color: #fff; border-color: var(--brand); }
.chip input:focus-visible + span { outline: 2px solid var(--brand); outline-offset: 2px; }
.field { display: block; font-weight: 600; margin-bottom: 12px; }
.field input { display: block; width: 100%; margin-top: 4px; padding: 10px; font: inherit; font-weight: 400; border: 1px solid var(--line);
  border-radius: 8px; background: var(--bg); color: var(--ink); }
#amount { font-size: 22px; }
.actions { display: flex; justify-content: flex-end; gap: 8px; }
.error { color: var(--red); min-height: 1.2em; }
.toast { position: fixed; left: 16px; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); background: var(--ink); color: var(--bg);
  padding: 12px 16px; border-radius: 10px; display: flex; align-items: center; gap: 12px; max-width: 608px; margin: 0 auto; z-index: 5; }
.toast[hidden], [hidden] { display: none !important; }
.toast button { margin-left: auto; background: transparent; color: var(--bg); border-color: var(--bg); }