:root {
  --bg: #f4f6f5;
  --panel: #ffffff;
  --text: #1c2421;
  --muted: #66736e;
  --line: #e2e7e5;
  --primary: #0f7a55;
  --primary-dark: #0b5e41;
  --primary-soft: #e3f3ec;
  --danger: #c0392b;
  --danger-soft: #fbeaea;
  --warn: #b7791f;
  --warn-soft: #fdf3e1;
  --radius: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.45; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.app { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: #12302a; color: #cfe3dc; padding: 20px 12px; flex-shrink: 0; }
.sidebar .brand { color: #fff; font-weight: 700; font-size: 18px; padding: 0 10px 18px; display: block; }
.sidebar nav a { display: block; color: #cfe3dc; padding: 9px 10px; border-radius: 8px; margin-bottom: 2px; }
.sidebar nav a:hover { background: rgba(255,255,255,.06); text-decoration: none; }
.sidebar nav a.active { background: rgba(255,255,255,.12); color: #fff; }
.sidebar form { margin-top: 18px; padding: 0 10px; }
.sidebar .link-btn { background: none; border: 0; color: #9fbdb2; cursor: pointer; padding: 0; font: inherit; }
.main { flex: 1; padding: 24px 28px; min-width: 0; }
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; flex-wrap: wrap; }
h1 { font-size: 22px; margin: 0; }
h2 { font-size: 16px; margin: 0 0 12px; }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 18px; }
.grid { display: grid; gap: 14px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.stat .label { color: var(--muted); font-size: 13px; }
.stat .value { font-size: 22px; font-weight: 700; margin-top: 2px; font-variant-numeric: tabular-nums; }
.stat.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.stat.primary .label { color: #cdeee0; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); font-weight: 600; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.anulado td { color: #9aa5a1; text-decoration: line-through; }
.table-wrap { overflow-x: auto; }

.btn { display: inline-block; background: var(--primary); color: #fff; border: 0; border-radius: 8px; padding: 9px 16px; font: inherit; font-weight: 600; cursor: pointer; }
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn.secondary { background: #fff; color: var(--text); border: 1px solid var(--line); }
.btn.danger { background: var(--danger); }
.btn.sm { padding: 5px 10px; font-size: 13px; }

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; font-weight: 600; }
input, select, textarea { width: 100%; padding: 9px 10px; border: 1px solid #cdd5d2; border-radius: 8px; font: inherit; background: #fff; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary-soft); border-color: var(--primary); }
input[type=checkbox] { width: auto; }
.field { margin-bottom: 14px; }
.check { display: flex; gap: 8px; align-items: center; font-weight: 400; color: var(--text); font-size: 15px; }
.inline-form { display: flex; gap: 8px; align-items: end; flex-wrap: wrap; }
.inline-form .field { margin: 0; }

.alert { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; }
.alert.ok { background: var(--primary-soft); color: var(--primary-dark); }
.alert.error { background: var(--danger-soft); color: var(--danger); }
.alert.warn { background: var(--warn-soft); color: var(--warn); }

.badge { display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: 12px; font-weight: 600; background: #eef1f0; color: var(--muted); }
.badge.activo, .badge.pagada, .badge.aprobado { background: var(--primary-soft); color: var(--primary-dark); }
.badge.parcial, .badge.pendiente { background: var(--warn-soft); color: var(--warn); }
.badge.vencida, .badge.anulado, .badge.rechazado { background: var(--danger-soft); color: var(--danger); }
.muted { color: var(--muted); }
.text-danger { color: var(--danger); }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.tabs a { padding: 6px 12px; border-radius: 99px; background: #fff; border: 1px solid var(--line); color: var(--text); }
.tabs a.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination { display: flex; gap: 4px; list-style: none; padding: 0; margin-top: 14px; flex-wrap: wrap; }
.pagination li > * { padding: 5px 10px; border: 1px solid var(--line); border-radius: 6px; background: #fff; display: block; }
.pagination .active > * { background: var(--primary); color: #fff; }
.pagination svg { width: 16px; }
.dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0; }
.dl dt { color: var(--muted); }
.dl dd { margin: 0; font-weight: 600; }
.bars { display: flex; align-items: flex-end; gap: 4px; height: 120px; padding-top: 8px; }
.bars .bar { flex: 1; background: var(--primary); border-radius: 4px 4px 0 0; min-height: 2px; position: relative; }
.bars .bar span { position: absolute; bottom: -20px; left: 50%; transform: translateX(-50%); font-size: 11px; color: var(--muted); }

.login { max-width: 360px; margin: 10vh auto; }

@media (max-width: 860px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; padding: 12px; }
  .sidebar nav { display: flex; overflow-x: auto; gap: 4px; }
  .sidebar nav a { white-space: nowrap; }
  .sidebar .brand { padding-bottom: 8px; }
  .main { padding: 16px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}