:root {
  --bg: #F5F4F0; --surface: #FFFFFF; --ink: #17181A; --muted: #5B5E63;
  --border: #D6D3CC; --primary: #1F4FD1;
  --amber-bg: #FDF1E3; --amber-ink: #8A4B08;
  --teal-bg: #E3F1EC; --teal-ink: #0B5B48;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 20px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; font-size: 1.1rem; }
.env-badge { font-size: 0.7rem; padding: 2px 8px; border-radius: 999px; margin-left: 8px; }
.env-dev { background: var(--amber-bg); color: var(--amber-ink); }
.env-prod { background: var(--teal-bg); color: var(--teal-ink); }
nav a { margin-left: 16px; color: var(--ink); text-decoration: none; font-size: 0.9rem; }
nav a:hover { color: var(--primary); }
.container { max-width: 1100px; margin: 0 auto; padding: 20px; }
.login-container { max-width: 360px; margin-top: 80px; }
h1 { font-size: 1.4rem; }
h2 { font-size: 1.1rem; margin-top: 32px; }
.form label {
  display: flex; flex-direction: column; gap: 4px; margin-bottom: 14px; font-size: 0.85rem; color: var(--muted);
}
.form input, .form select {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 10px; font-size: 1rem; background: var(--surface); color: var(--ink);
}
.form button, .small {
  background: var(--primary); color: #fff; border: none; border-radius: 10px;
  padding: 10px 18px; font-size: 0.95rem; cursor: pointer;
}
.small { padding: 4px 10px; font-size: 0.75rem; }
.filters { display: flex; gap: 16px; align-items: flex-end; flex-wrap: wrap; margin-bottom: 16px; }
.filters label { display: flex; flex-direction: column; font-size: 0.8rem; color: var(--muted); gap: 2px; }
.filters input, .filters select { padding: 6px 8px; border: 1px solid var(--border); border-radius: 8px; }
.filters button { background: var(--primary); color: #fff; border: none; border-radius: 8px; padding: 8px 14px; cursor: pointer; }
table.data { width: 100%; border-collapse: collapse; background: var(--surface); border-radius: 14px; overflow: hidden; }
table.data th, table.data td { padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 0.85rem; text-align: left; }
table.data th { color: var(--muted); font-weight: 600; }
.num { font-family: "SF Mono", "Consolas", monospace; text-align: right; font-variant-numeric: tabular-nums; }
.strong { font-weight: 700; }
.muted { color: var(--muted); }
.row-income td:nth-child(6) { color: var(--teal-ink); }
.row-expense td:nth-child(6) { color: var(--amber-ink); }
.error { color: #B3261E; }
.edit-link { color: var(--primary); text-decoration: none; font-size: 0.75rem; align-self: center; }
.delete-btn { background: #B3261E; }
.success { color: var(--teal-ink); }
.inline-form { display: flex; gap: 4px; }
.inline-form input { width: 70px; padding: 3px 6px; border: 1px solid var(--border); border-radius: 6px; font-size: 0.75rem; }
.book-tabs { margin-bottom: 16px; }
.book-tabs a { display: inline-block; padding: 6px 14px; border-radius: 999px; text-decoration: none; color: var(--muted); background: var(--surface); border: 1px solid var(--border); margin-right: 8px; font-size: 0.85rem; }
.book-tabs a.active { background: var(--primary); color: #fff; border-color: var(--primary); }