:root {
  --bg: #f6f7f8; --card: #fff; --text: #14201f; --muted: #5d6b69; --line: #e2e7e6;
  --brand: #0f766e; --brand-text: #fff; --bad: #b42318; --good: #067647;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0e1514; --card: #16201f; --text: #e8efee; --muted: #93a3a1; --line: #263231; --brand: #2dd4bf; --brand-text: #052e2a; --bad: #f97066; --good: #4ade80; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 system-ui, "Segoe UI", Tahoma, sans-serif; padding: env(safe-area-inset-top) 16px calc(72px + env(safe-area-inset-bottom)); }
main { max-width: 560px; margin: 0 auto; }
h1 { font-size: 20px; margin: 20px 0 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; margin: 12px 0; }
.row { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.row:last-child { border-bottom: 0; }
.row b { font-variant-numeric: tabular-nums; }
.net b { font-size: 20px; }
.pos { color: var(--good); } .neg { color: var(--bad); }
.muted { color: var(--muted); font-size: 14px; }
.warn { background: #fef0c7; color: #7a2e0e; border-radius: 12px; padding: 10px 14px; margin: 12px 0; font-size: 14px; }
input, select, button { font: inherit; border-radius: 10px; border: 1px solid var(--line); padding: 10px 12px; background: var(--card); color: var(--text); width: 100%; margin: 6px 0; }
button { background: var(--brand); color: var(--brand-text); border: 0; font-weight: 600; cursor: pointer; }
button.ghost { background: transparent; color: var(--bad); width: auto; padding: 4px 8px; margin: 0; }
button.alt { background: transparent; color: var(--text); border: 1px solid var(--line); }
.month { display: flex; gap: 8px; } .month select { flex: 2; } .month input { flex: 1; }
nav { position: fixed; inset: auto 0 0 0; display: flex; background: var(--card); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom); }
nav button { flex: 1; font-size: 12px; background: none; color: var(--muted); border-radius: 0; margin: 0; padding: 14px 4px; }
nav button.on { color: var(--brand); }
.err { color: var(--bad); min-height: 1.5em; }

label { display: block; margin-top: 8px; }