:root {
  --navy: #0b2545; --blue: #1d4ed8; --blue-2: #2563eb; --blue-3: #3b82f6;
  --sky: #e8f0fe; --sky-2: #f4f8ff; --line: #d6e2f5;
  --fg: #0f1f3d; --muted: #5b6b86; --card: #fff;
  --shadow: 0 4px 16px rgba(13, 42, 94, .08);
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; color: var(--fg);
       background: linear-gradient(180deg, var(--sky) 0, var(--sky-2) 320px) fixed; min-height: 100vh; }
a { color: var(--blue); font-weight: 500; }

/* Barra superior */
nav { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; padding: 12px 20px;
      background: linear-gradient(90deg, var(--navy), var(--blue)); color: #fff; box-shadow: var(--shadow); }
nav b { font-size: 1.15rem; margin-right: 14px; letter-spacing: .3px; }
nav a { color: #fff; text-decoration: none; padding: 7px 14px; border-radius: 999px; transition: background .15s; }
nav a:hover { background: rgba(255, 255, 255, .18); }
nav span { margin-left: auto; color: #cfe0ff; }
nav span a { background: rgba(255, 255, 255, .15); margin-left: 6px; }

main { max-width: 1040px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 1.7rem; color: var(--navy); margin: 0 0 16px; }
h2 { font-size: 1.2rem; color: var(--navy); margin-top: 2em; padding-left: 10px; border-left: 4px solid var(--blue-3); }
h3 { color: var(--navy); margin-top: 0; }

/* Tablas */
table { width: 100%; border-collapse: separate; border-spacing: 0; background: var(--card);
        border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); }
th, td { padding: 10px 12px; text-align: left; vertical-align: middle; }
thead th { background: var(--navy); color: #fff; font-size: .78rem; text-transform: uppercase; letter-spacing: .5px; position: sticky; top: 0; z-index: 1; }
tbody tr:nth-child(even) { background: var(--sky-2); }
tbody tr:hover { background: var(--sky); }
tbody td { border-bottom: 1px solid var(--line); }
tfoot td { background: var(--sky); font-size: 1.02rem; }
.num { text-align: right; white-space: nowrap; }
.scroll { overflow: auto; max-height: 70vh; border-radius: 12px; box-shadow: var(--shadow); }
.scroll table { box-shadow: none; }

/* Tarjetas y formularios */
.card, .doc { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px; margin: 16px 0; box-shadow: var(--shadow); }
.doc table { box-shadow: none; border: 1px solid var(--line); }
.login { max-width: 380px; margin: 40px auto; border-top: 5px solid var(--blue); }
main:has(.login) h1 { text-align: center; margin-top: 48px; }
label { display: block; margin: 10px 0; font-weight: 500; color: var(--navy); }
input, select, textarea { font: inherit; padding: 9px 12px; border: 1.5px solid var(--line); border-radius: 8px; background: #fff; color: var(--fg); }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--blue-3); box-shadow: 0 0 0 3px rgba(59, 130, 246, .2); }
label input, label textarea { display: block; width: 100%; margin-top: 4px; font-weight: 400; }
td input[type=number] { width: 96px; text-align: right; }
#buscar { width: 100%; margin-bottom: 12px; padding: 12px 14px; font-size: 1rem; box-shadow: var(--shadow); }

/* Botones */
button { font: inherit; font-weight: 600; padding: 11px 22px; border: 0; border-radius: 10px; cursor: pointer;
         background: linear-gradient(180deg, var(--blue-2), var(--blue)); color: #fff;
         box-shadow: 0 3px 10px rgba(29, 78, 216, .35); transition: transform .1s, box-shadow .15s, filter .15s; }
button:hover { filter: brightness(1.08); box-shadow: 0 5px 16px rgba(29, 78, 216, .45); }
button:active { transform: translateY(1px); }
button.sec { background: #fff; color: var(--blue); border: 2px solid var(--blue); box-shadow: none; padding: 9px 20px; }
button.sec:hover { background: var(--sky); }
td button { padding: 7px 14px; font-size: .9rem; }
form.inline { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

/* Mensajes, etiquetas, KPIs */
.flash { background: var(--sky); border-left: 5px solid var(--blue); color: var(--navy); padding: 12px 14px; border-radius: 8px; }
.error { background: #fee2e2; border-left: 5px solid #dc2626; color: #7f1d1d; padding: 12px 14px; border-radius: 8px; }
.tag { padding: 3px 10px; border-radius: 999px; font-size: .8rem; font-weight: 600; white-space: nowrap; }
.rojo { background: #fee2e2; color: #991b1b; } .verde { background: #dcfce7; color: #166534; }
.azul { background: #dbeafe; color: #1e40af; } .amarillo { background: #fef3c7; color: #92400e; }
.gris { background: #e5e7eb; color: #4b5563; }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin: 16px 0 8px; }
.kpis div { background: var(--card); border-radius: 14px; padding: 16px 18px; box-shadow: var(--shadow); border-top: 4px solid var(--blue-3); }
.kpis div:first-child { background: linear-gradient(135deg, var(--navy), var(--blue)); color: #fff; border-top-color: transparent; }
.kpis div:first-child small { color: #cfe0ff; }
.kpis small { display: block; color: var(--muted); font-weight: 500; }
.kpis b { font-size: 1.6rem; }
.total { font-size: 1.25rem; background: var(--card); display: inline-block; padding: 10px 18px; border-radius: 10px; box-shadow: var(--shadow); }
.total b { color: var(--blue); }
.inactivo { color: #9aa6ba; }

@media (max-width: 600px) { nav span { margin-left: 0; width: 100%; } h1 { font-size: 1.4rem; } }
@media print {
  nav, .no-print, form { display: none !important; }
  body { background: #fff; } main { padding: 0; }
  .scroll { max-height: none; overflow: visible; box-shadow: none; }
  table, .card, .doc { box-shadow: none; }
  thead th { background: #0b2545 !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}