:root {
  color-scheme: dark light;
  --bg: #0f172a;
  --panel: #111827;
  --text: #f8fafc;
  --muted: #94a3b8;
  --border: #334155;
  --accent: #38bdf8;
  --good: #16a34a;
  --bad: #e11d48;
  --input: #ffffff;
  --input-text: #020617;
}
[data-theme="light"] {
  --bg: #f8fafc;
  --panel: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #cbd5e1;
  --accent: #0284c7;
  --good: #15803d;
  --bad: #be123c;
  --input: #ffffff;
  --input-text: #020617;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f8fafc;
    --panel: #ffffff;
    --text: #0f172a;
    --muted: #64748b;
    --border: #cbd5e1;
    --accent: #0284c7;
    --input: #ffffff;
    --input-text: #020617;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 16px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}
.app { max-width: 1080px; margin: 0 auto; }
.top, .row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 16px;
  margin: 14px 0;
}
.grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
@media (min-width: 850px) { .grid { grid-template-columns: 380px 1fr; } }
h1, h2 { margin: 0 0 8px; }
.muted, .status { color: var(--muted); }
.hidden { display: none; }
label { display: block; color: var(--muted); margin: 12px 0 6px; }
input, select, button {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  font-size: 16px;
}
input, select { background: var(--input); color: var(--input-text); }
button {
  background: var(--accent);
  color: white;
  font-weight: 800;
  border: 0;
  margin-top: 12px;
}
button.secondary { background: #475569; }
button.danger { background: var(--bad); }
.checks { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.check {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
}
.check input { width: auto; }
.card {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  margin: 8px 0;
}
.good { color: var(--good); font-weight: 800; }
.bad { color: var(--bad); font-weight: 800; }
.total { font-size: 24px; }
.expense-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}