/* Sistema de Gestión de Pagos Escolares — Identidad visual (RNF-6) */

:root {
  --color-primario-inicio: #4f46e5;   /* azul-violeta */
  --color-primario-fin: #7c3aed;      /* púrpura */
  --color-gradiente: linear-gradient(135deg, var(--color-primario-inicio), var(--color-primario-fin));
  --color-fondo: #f4f5f8;             /* gris muy claro, no blanco puro */
  --color-texto: #2b2d42;             /* gris oscuro azulado, no negro puro */
  --color-texto-suave: #6b7280;
  --color-borde: #e5e7eb;
  --color-pagado: #16a34a;
  --color-pagado-bg: #dcfce7;
  --color-pendiente: #ca8a04;
  --color-pendiente-bg: #fef9c3;
  --color-atrasado: #dc2626;
  --color-atrasado-bg: #fee2e2;
  --color-mixto: #6b7280;
  --color-mixto-bg: #e5e7eb;
  --sidebar-width: 260px;
}

* { box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-fondo);
  color: var(--color-texto);
  margin: 0;
}

a { color: var(--color-primario-fin); text-decoration: none; }

h1 { font-size: 1.75rem; font-weight: 700; margin: 0 0 4px; }
h2 { font-size: 1.25rem; font-weight: 700; margin: 0 0 12px; }
h3 { font-size: 1.05rem; font-weight: 600; margin: 0 0 8px; }
.subtitulo { color: var(--color-texto-suave); font-size: 0.9rem; margin-bottom: 20px; }

/* ---------- Layout con sidebar fijo ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-width);
  background: var(--color-gradiente);
  color: #fff;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform .25s ease;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 18px;
  border-bottom: 1px solid rgba(255,255,255,.15);
}
.sidebar-brand .logo-circle {
  width: 40px; height: 40px; border-radius: 10px;
  background: rgba(255,255,255,.18);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0; overflow: hidden;
}
.sidebar-brand .logo-circle img { width: 100%; height: 100%; object-fit: cover; }
.sidebar-brand .brand-text { font-size: .85rem; line-height: 1.25; }
.sidebar-brand .brand-text b { display: block; font-size: .95rem; }

.sidebar-nav { flex: 1; padding: 10px 10px; overflow-y: auto; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 10px;
  color: rgba(255,255,255,.88);
  padding: 11px 14px;
  border-radius: 10px;
  margin-bottom: 3px;
  font-size: .92rem;
  font-weight: 500;
}
.sidebar-nav a:hover { background: rgba(255,255,255,.12); color: #fff; }
.sidebar-nav a.activo { background: rgba(255,255,255,.22); color: #fff; font-weight: 600; }
.sidebar-nav .grupo-titulo {
  font-size: .7rem; text-transform: uppercase; letter-spacing: .06em;
  color: rgba(255,255,255,.55); margin: 14px 14px 6px;
}
.sidebar-footer {
  padding: 14px 18px; border-top: 1px solid rgba(255,255,255,.15); font-size: .85rem;
}
.sidebar-footer a { color: #fff; opacity: .85; }

.main-area { margin-left: var(--sidebar-width); flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
  background: #fff; border-bottom: 1px solid var(--color-borde);
  padding: 14px 26px; display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 50;
}
.topbar .hamburguesa { display: none; background: none; border: none; font-size: 22px; cursor: pointer; color: var(--color-texto); }

.contenido { padding: 26px; flex: 1; }

/* ---------- Login ---------- */
.login-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-gradiente);
  padding: 20px;
}
.login-card {
  background: #fff; border-radius: 18px; box-shadow: 0 20px 60px rgba(0,0,0,.25);
  padding: 40px 36px; width: 100%; max-width: 400px;
}
.login-logo { text-align: center; margin-bottom: 18px; }
.login-logo .logo-circle {
  width: 64px; height: 64px; border-radius: 16px; background: var(--color-gradiente);
  display: inline-flex; align-items: center; justify-content: center; font-size: 30px; color: #fff;
  overflow: hidden;
}
.login-logo .logo-circle img { width: 100%; height: 100%; object-fit: cover; }
.login-card h1 { text-align: center; font-size: 1.3rem; }
.login-card .subtitulo { text-align: center; }

/* ---------- Formularios ---------- */
label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 5px; color: var(--color-texto); }
input, select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--color-borde); border-radius: 9px;
  font-size: .92rem; font-family: inherit; color: var(--color-texto); background: #fff;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--color-primario-fin); box-shadow: 0 0 0 3px rgba(124,58,237,.14); }
.campo { margin-bottom: 16px; }
.error-campo { color: var(--color-atrasado); font-size: .8rem; margin-top: 4px; }
.ayuda-campo { color: var(--color-texto-suave); font-size: .78rem; margin-top: 4px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 18px; border-radius: 9px; border: none; font-size: .9rem; font-weight: 600;
  cursor: pointer; text-decoration: none;
}
.btn-primario { background: var(--color-gradiente); color: #fff; }
.btn-primario:hover { opacity: .92; }
.btn-primario:disabled { opacity: .45; cursor: not-allowed; }
.btn-secundario { background: #fff; color: var(--color-texto); border: 1px solid var(--color-borde); }
.btn-secundario:hover { background: #f3f4f6; }
.btn-peligro { background: var(--color-atrasado); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: .8rem; }
.btn-block { width: 100%; }
.btn-icono { padding: 7px 9px; }

/* ---------- Tarjetas / Cards ---------- */
.card { background: #fff; border-radius: 14px; padding: 20px 22px; border: 1px solid var(--color-borde); }
.grid-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap: 16px; margin-bottom: 22px; }
.stat-card { background: #fff; border-radius: 14px; padding: 18px 20px; border: 1px solid var(--color-borde); }
.stat-card .stat-label { font-size: .8rem; color: var(--color-texto-suave); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.stat-card .stat-valor { font-size: 1.7rem; font-weight: 800; margin: 6px 0 4px; }
.stat-card .stat-var { font-size: .8rem; font-weight: 600; }
.stat-var.positivo { color: var(--color-pagado); }
.stat-var.negativo { color: var(--color-atrasado); }

/* ---------- Tablas ---------- */
.tabla-wrap { background: #fff; border-radius: 14px; border: 1px solid var(--color-borde); overflow: hidden; }
table { width: 100%; border-collapse: collapse; font-size: .88rem; }
thead th {
  text-align: left; padding: 12px 16px; background: #fafafa; color: var(--color-texto-suave);
  font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .03em;
  border-bottom: 1px solid var(--color-borde);
}
tbody td { padding: 12px 16px; border-bottom: 1px solid var(--color-borde); vertical-align: middle; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #faf9ff; }
.tabla-toolbar { display: flex; flex-wrap: wrap; gap: 10px; padding: 16px; border-bottom: 1px solid var(--color-borde); align-items: center; }
.tabla-toolbar input, .tabla-toolbar select { width: auto; min-width: 150px; }

/* ---------- Badges semáforo (RNF-01.3 / RNF-6.3) ---------- */
.badge-estado { padding: 4px 10px; border-radius: 999px; font-size: .75rem; font-weight: 700; display: inline-block; }
.badge-pagado { background: var(--color-pagado-bg); color: var(--color-pagado); }
.badge-pendiente { background: var(--color-pendiente-bg); color: var(--color-pendiente); }
.badge-atrasado { background: var(--color-atrasado-bg); color: var(--color-atrasado); }
.badge-mixto { background: var(--color-mixto-bg); color: var(--color-mixto); }

/* ---------- Mensajes flash ---------- */
.alerta { padding: 12px 16px; border-radius: 10px; margin-bottom: 18px; font-size: .88rem; font-weight: 500; }
.alerta-exito { background: var(--color-pagado-bg); color: #14532d; }
.alerta-error { background: var(--color-atrasado-bg); color: #7f1d1d; }
.alerta-info { background: #dbeafe; color: #1e3a8a; }

/* ---------- Modal ---------- */
.modal-overlay {
  display: none; position: fixed; inset: 0; background: rgba(30,27,50,.55);
  align-items: center; justify-content: center; z-index: 1000; padding: 20px;
}
.modal-overlay.abierto { display: flex; }
.modal-box { background: #fff; border-radius: 16px; width: 100%; max-width: 560px; max-height: 90vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,.3); }
.modal-box.ancho { max-width: 780px; }
.modal-header { padding: 18px 22px; border-bottom: 1px solid var(--color-borde); display: flex; justify-content: space-between; align-items: center; }
.modal-header h3 { margin: 0; }
.modal-cerrar { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--color-texto-suave); }
.modal-body { padding: 22px; }
.modal-footer { padding: 16px 22px; border-top: 1px solid var(--color-borde); display: flex; justify-content: flex-end; gap: 10px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }
@media (max-width: 640px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.progreso-bar-bg { background: #e5e7eb; border-radius: 999px; height: 10px; overflow: hidden; }
.progreso-bar-fill { background: var(--color-gradiente); height: 100%; border-radius: 999px; }

.chip { display: inline-flex; align-items: center; padding: 4px 10px; border-radius: 999px; background: #f3f4f6; font-size: .78rem; margin-right: 6px; }

.banner-alerta {
  background: var(--color-atrasado-bg); color: #7f1d1d; padding: 12px 18px; border-radius: 12px;
  margin-bottom: 20px; display: flex; align-items: center; justify-content: space-between; font-size: .9rem; font-weight: 500;
}
.banner-alerta a { color: #7f1d1d; text-decoration: underline; font-weight: 700; }

.texto-suave { color: var(--color-texto-suave); }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* ---------- Responsive: menú hamburguesa ---------- */
@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.abierto { transform: translateX(0); }
  .main-area { margin-left: 0; }
  .topbar .hamburguesa { display: block; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .grid-3 { grid-template-columns: 1fr; }
  .login-card { padding: 28px 22px; }
  .contenido { padding: 16px; }
}

/* ---------- Disclaimer ---------- */
.disclaimer-page { min-height: 100vh; display: flex; flex-direction: column; background: #fff; }
.disclaimer-scroll { flex: 1; overflow-y: auto; padding: 34px 22px; max-width: 780px; margin: 0 auto; width: 100%; }
.disclaimer-scroll h2 { margin-top: 26px; }
.disclaimer-scroll h2:first-child { margin-top: 0; }
.disclaimer-footer {
  border-top: 1px solid var(--color-borde); padding: 18px 22px; background: #fafafa;
  display: flex; flex-direction: column; gap: 12px; align-items: center;
}
.disclaimer-footer .acciones { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.check-aceptar { display: flex; align-items: flex-start; gap: 10px; max-width: 620px; font-size: .88rem; }
.check-aceptar input { width: auto; margin-top: 3px; }