:root {
  --bg: #f4f5f7;
  --card-bg: #ffffff;
  --text: #1c1f26;
  --muted: #6b7280;
  --border: #e2e4e9;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --pos: #16794f;
  --neg: #b91c1c;
  --warn-bg: #fff7e6;
  --warn-border: #f0c674;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --card-bg: #1e2128;
    --text: #e7e9ee;
    --muted: #9aa0ab;
    --border: #2c303a;
    --accent: #5b8def;
    --accent-dark: #7ba3f3;
    --pos: #4ade80;
    --neg: #f87171;
    --warn-bg: #332a12;
    --warn-border: #7a5a12;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1100px; margin: 0 auto; padding: 24px 16px 60px; }
.container.narrow { max-width: 480px; }

.topnav {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 20px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}
.topnav .brand { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.topnav .right { margin-left: auto; }

.page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
h1 { font-size: 1.5rem; margin: 0; }
h2 { font-size: 1.15rem; margin: 32px 0 12px; }

.btn, button, input[type="submit"] {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 0.9rem;
  cursor: pointer;
}
.btn:hover, button:hover { background: var(--accent-dark); text-decoration: none; }
button.link-btn {
  background: none;
  color: var(--neg);
  padding: 2px 6px;
  font-size: 0.85rem;
}
button.link-btn:hover { text-decoration: underline; background: none; }

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 8px;
}
.summary-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}
.summary-card span { display: block; color: var(--muted); font-size: 0.8rem; margin-bottom: 4px; }
.summary-card strong { font-size: 1.15rem; }
.summary-card.warn { background: var(--warn-bg); border-color: var(--warn-border); }
.summary-card.pos strong { color: var(--pos); }
.summary-card.neg strong { color: var(--neg); }

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.table th, .table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}
.table th { color: var(--muted); font-weight: 600; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.02em; }
.table td.num, .table th.num { text-align: right; font-variant-numeric: tabular-nums; }
.table tr:last-child td { border-bottom: none; }
.table td.over { color: var(--neg); }
.table td.owed { color: var(--neg); }
.table td.pos { color: var(--pos); }
.table td.neg { color: var(--neg); }

tr.log-row td { background: rgba(0,0,0,0.015); padding: 8px 12px 14px; }
tr.archived-row { opacity: 0.6; }
.tag { font-size: 0.7rem; color: var(--muted); border: 1px solid var(--border); border-radius: 6px; padding: 1px 6px; }

details summary { cursor: pointer; color: var(--muted); font-size: 0.85rem; margin: 4px 0; }
.tx-table { width: 100%; border-collapse: collapse; margin: 8px 0; font-size: 0.9rem; }
.tx-table th, .tx-table td { padding: 6px 8px; border-bottom: 1px solid var(--border); text-align: left; }
.tx-table th.num, .tx-table td.num { text-align: right; }

.inline-edit, .tx-add-form {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.inline-edit input[type="number"], .inline-edit input[type="text"], .tx-add-form input {
  width: 110px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}
.tx-add-form input[type="date"] { width: 140px; }
label.chk { display: flex; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--muted); width: auto; }

form label {
  display: block;
  margin-bottom: 14px;
  font-size: 0.9rem;
  color: var(--muted);
}
form input[type="text"], form input[type="password"], form input[type="date"], form input[type="number"], form select {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text);
  font-size: 1rem;
}

.muted { color: var(--muted); font-size: 0.9rem; }
.error { color: var(--neg); font-weight: 600; }

.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: 100%;
  max-width: 360px;
}
.login-box h1 { margin-bottom: 12px; }

.add-category-form {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  max-width: 480px;
}

@media (max-width: 720px) {
  .table, .table thead, .table tbody, .table tr, .table td { display: block; width: 100%; }
  .table thead { display: none; }
  .table tr { border-bottom: 2px solid var(--border); padding: 8px 0; }
  .table td { border-bottom: none; padding: 4px 12px; text-align: left !important; }
  .table td.num::before, .table td:not(.num)::before { content: attr(data-label) ": "; color: var(--muted); font-size: 0.75rem; }
}