:root {
  --bg: #0f1420;
  --panel: #171d2b;
  --panel2: #1d2536;
  --border: #2a3348;
  --text: #e7ebf3;
  --muted: #94a1b8;
  --accent: #4f8cff;
  --green: #33c17e;
  --amber: #f0b429;
  --red: #ef5b5b;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

header.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

header.topbar h1 {
  font-size: 18px;
  margin: 0;
  font-weight: 600;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 20px;
  font-size: 14px;
}

nav a:hover, nav a.active {
  color: var(--text);
}

main {
  padding: 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 28px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  display: block;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, transform 0.1s;
}

a.card {
  cursor: pointer;
}

a.card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.card .num {
  font-size: 28px;
  font-weight: 700;
}

.card .label {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 4px;
}

.card.red .num { color: var(--red); }
.card.amber .num { color: var(--amber); }
.card.green .num { color: var(--green); }

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
}

th, td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

th {
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 11px;
  background: var(--panel2);
}

/* Caja con scroll propio para tablas largas: el encabezado queda pegado
   arriba de esa caja (no de la página entera) y solo se desplazan las filas. */
.table-scroll {
  max-height: 65vh;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.table-scroll table {
  border: none;
  border-radius: 0;
}

.table-scroll thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  box-shadow: 0 1px 0 var(--border);
}

tr:last-child td { border-bottom: none; }

tr:hover td { background: rgba(255,255,255,0.02); }

a { color: var(--accent); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}

.badge.vencido { background: rgba(239,91,91,0.15); color: var(--red); }
.badge.por_vencer { background: rgba(240,180,41,0.15); color: var(--amber); }
.badge.vigente { background: rgba(51,193,126,0.15); color: var(--green); }
.badge.sin_fecha { background: rgba(148,161,184,0.15); color: var(--muted); }

.badge.pagado { background: rgba(51,193,126,0.15); color: var(--green); }
.badge.facturado { background: rgba(79,140,255,0.15); color: var(--accent); }
.badge.pendiente { background: rgba(240,180,41,0.15); color: var(--amber); }
.badge.no_factura { background: rgba(148,161,184,0.15); color: var(--muted); }

.filters {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

input, select, textarea, button {
  background: var(--panel2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 13px;
}

button {
  background: var(--accent);
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 600;
}

button.secondary {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
}

form.inline { display: inline; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  max-width: 700px;
}

.form-grid label {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}

.form-grid input, .form-grid select, .form-grid textarea {
  width: 100%;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
}