:root {
  --bg: #f5f6fa;
  --panel: #ffffff;
  --text: #1f233c;
  --muted: #6b7280;
  --accent: #2c3e50;
  --accent-2: #3d9970;
  --border: #e2e4ea;
  --danger: #b3261e;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.85rem 1.5rem;
  background: var(--accent);
}

.nav a {
  color: #fff;
  text-decoration: none;
  font-size: 0.95rem;
  opacity: 0.9;
}

.nav a:hover { opacity: 1; text-decoration: underline; }

.nav .brand {
  font-weight: 700;
  font-size: 1.05rem;
  opacity: 1;
  margin-right: 0.5rem;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 1.75rem 1.5rem 3rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

h1 { font-size: 1.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.15rem; margin: 0 0 0.75rem; }

.alert {
  background: #eaf5ee;
  border: 1px solid var(--accent-2);
  color: #1c5233;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 0.6rem;
  text-align: left;
}

th { color: var(--muted); font-weight: 600; }

.actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1.25rem; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.9rem;
  cursor: pointer;
}

.btn.secondary { background: var(--muted); }
.btn.danger { background: var(--danger); }

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.25rem;
  margin-top: 0.85rem;
}

input, select, textarea {
  width: 100%;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.9rem;
  font-family: inherit;
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1.25rem; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0 1.25rem; }

.items-table th, .items-table td { padding: 0.35rem; }
.items-table input, .items-table select { padding: 0.35rem; font-size: 0.85rem; }
.items-table td { vertical-align: top; }
.items-table textarea {
  padding: 0.35rem;
  font-size: 0.85rem;
  line-height: 1.35;
  min-height: 5.9rem; /* cuatro líneas visibles */
  resize: vertical;
}

.totales { text-align: right; margin-top: 1rem; font-size: 0.95rem; }
.totales .total-final { font-size: 1.15rem; font-weight: 700; }

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  background: #e5e7eb;
  color: #374151;
}

.badge.anulado { background: #fbe4e2; color: var(--danger); }

.dashboard-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 1.5rem; }
.dashboard-cards .card { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 1rem; text-align: center; }
.dashboard-cards .card .num { font-size: 1.6rem; font-weight: 700; }
.dashboard-cards .card .label { color: var(--muted); font-size: 0.85rem; }

.tipo-links { display: flex; gap: 0.75rem; flex-wrap: wrap; }