/* ============================================================
   components.css — Botones, inputs, tablas, cards, modales
   SitecAcademico · Universidad Panamericana
   ============================================================ */

/* ── Botones ─────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radio);
  font-size: 0.85rem;
  font-weight: 600;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s, opacity 0.15s;
  white-space: nowrap;
  letter-spacing: 0.01em;
}
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn svg { flex-shrink: 0; }

.btn-primario {
  background: var(--azul);
  color: var(--blanco);
  border-color: var(--azul);
}
.btn-primario:hover:not(:disabled) { background: var(--azul-medio); border-color: var(--azul-medio); }

.btn-secundario {
  background: var(--blanco);
  color: var(--azul);
  border-color: var(--azul);
}
.btn-secundario:hover:not(:disabled) { background: var(--azul-claro); }

.btn-peligro {
  background: var(--error);
  color: var(--blanco);
  border-color: var(--error);
}
.btn-peligro:hover:not(:disabled) { background: #B91C1C; border-color: #B91C1C; }

.btn-fantasma {
  background: transparent;
  color: var(--gris-texto);
  border-color: var(--gris-borde);
}
.btn-fantasma:hover:not(:disabled) { background: var(--gris-claro); color: var(--texto); }

.btn-icono {
  padding: 7px;
  background: transparent;
  border-color: var(--gris-borde);
  color: var(--gris-texto);
}
.btn-icono:hover:not(:disabled) { background: var(--gris-claro); color: var(--texto); }

.btn-sm { padding: 5px 10px; font-size: 0.78rem; }
.btn-lg { padding: 10px 20px; font-size: 0.95rem; }
.btn-bloque { width: 100%; justify-content: center; }

/* ── Inputs y formularios ────────────────────────────── */
.campo-grupo { margin-bottom: 16px; }

.campo-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--azul);
  margin-bottom: 5px;
}

.campo-label .requerido { color: var(--error); margin-left: 2px; }

.campo-wrap { position: relative; }

.campo-icono-izq {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gris-texto);
  pointer-events: none;
  display: flex;
}

.campo-input,
.campo-select,
.campo-textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1.5px solid var(--gris-borde);
  border-radius: var(--radio);
  font-size: 0.88rem;
  color: var(--texto);
  background: var(--blanco);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.campo-input.con-icono { padding-left: 34px; }

.campo-input::placeholder,
.campo-textarea::placeholder { color: #B0B8C8; }

.campo-input:focus,
.campo-select:focus,
.campo-textarea:focus {
  border-color: var(--azul);
  box-shadow: 0 0 0 3px rgba(27,58,107,0.1);
}

.campo-input.error,
.campo-select.error { border-color: var(--error); }
.campo-input.error:focus { box-shadow: 0 0 0 3px rgba(220,38,38,0.1); }

.campo-error {
  display: none;
  font-size: 0.75rem;
  color: var(--error);
  margin-top: 4px;
}
.campo-error.visible { display: block; }

.campo-ayuda {
  font-size: 0.75rem;
  color: var(--gris-texto);
  margin-top: 4px;
}

.campo-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' stroke='%236B7280' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
  cursor: pointer;
}

.campo-textarea { resize: vertical; min-height: 80px; }

/* Grid de formulario */
.form-grid { display: grid; gap: 16px; }
.form-grid-2 { grid-template-columns: 1fr 1fr; }
.form-grid-3 { grid-template-columns: 1fr 1fr 1fr; }

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

/* ── Cards ───────────────────────────────────────────── */
.card {
  background: var(--blanco);
  border: 1px solid var(--gris-borde);
  border-radius: var(--radio-lg);
  box-shadow: var(--sombra);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--gris-borde);
  gap: 12px;
}

.card-titulo {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--negro);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-body { padding: 20px; }
.card-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--gris-borde);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* Cards de métricas */
.card-metrica {
  background: var(--blanco);
  border: 1px solid var(--gris-borde);
  border-radius: var(--radio-lg);
  padding: 20px;
  box-shadow: var(--sombra);
}

.metrica-valor {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--azul);
  line-height: 1;
  margin-bottom: 4px;
}

.metrica-etiqueta {
  font-size: 0.8rem;
  color: var(--gris-texto);
}

.metrica-icono {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--azul-claro);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--azul);
  margin-bottom: 12px;
}

/* ── Tablas ──────────────────────────────────────────── */
.tabla-wrap {
  overflow-x: auto;
  border-radius: var(--radio-lg);
  border: 1px solid var(--gris-borde);
  box-shadow: var(--sombra);
}

.tabla {
  width: 100%;
  border-collapse: collapse;
  background: var(--blanco);
  font-size: 0.85rem;
}

.tabla thead tr {
  background: var(--gris-claro);
  border-bottom: 2px solid var(--gris-borde);
}

.tabla th {
  padding: 10px 16px;
  text-align: left;
  font-weight: 700;
  color: var(--azul);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.tabla td {
  padding: 12px 16px;
  color: var(--texto);
  border-bottom: 1px solid var(--gris-borde);
  vertical-align: middle;
}

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

.tabla tbody tr:hover { background: var(--gris-bg); }

.tabla .col-acciones {
  width: 1%;
  white-space: nowrap;
  text-align: right;
}

.tabla .col-acciones-btns {
  display: flex;
  gap: 4px;
  justify-content: flex-end;
}

/* Fila vacía */
.tabla-vacia {
  text-align: center;
  padding: 48px 24px;
  color: var(--gris-texto);
}
.tabla-vacia svg { margin: 0 auto 12px; opacity: 0.4; }
.tabla-vacia p { font-size: 0.88rem; }

/* ── Barra de filtros ────────────────────────────────── */
.barra-filtros {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.barra-filtros .campo-input,
.barra-filtros .campo-select {
  width: auto;
  min-width: 160px;
}

.barra-filtros .busqueda {
  flex: 1;
  min-width: 200px;
  max-width: 320px;
}

/* ── Paginación ──────────────────────────────────────── */
.paginacion {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-top: 1px solid var(--gris-borde);
  font-size: 0.8rem;
  color: var(--gris-texto);
  flex-wrap: wrap;
  gap: 8px;
}

.paginacion-btns {
  display: flex;
  gap: 4px;
}

.pag-btn {
  width: 32px; height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--gris-borde);
  border-radius: 6px;
  background: var(--blanco);
  color: var(--texto);
  font-size: 0.82rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.pag-btn:hover { background: var(--gris-claro); }
.pag-btn.activo { background: var(--azul); color: var(--blanco); border-color: var(--azul); }
.pag-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── Modal ───────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.modal-overlay.visible { display: flex; }

.modal {
  background: var(--blanco);
  border-radius: var(--radio-lg);
  box-shadow: var(--sombra-lg);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  animation: aparecer 0.2s ease;
}

.modal-lg { max-width: 760px; }
.modal-sm { max-width: 400px; }

@keyframes aparecer {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--gris-borde);
  flex-shrink: 0;
}

.modal-titulo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--negro);
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-cerrar {
  background: none;
  border: none;
  color: var(--gris-texto);
  display: flex;
  padding: 4px;
  border-radius: 6px;
  transition: background 0.15s;
}
.modal-cerrar:hover { background: var(--gris-claro); color: var(--texto); }

.modal-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--gris-borde);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  flex-shrink: 0;
}

/* ── Toast / notificaciones ──────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radio);
  background: var(--negro);
  color: var(--blanco);
  font-size: 0.85rem;
  box-shadow: var(--sombra-lg);
  pointer-events: all;
  animation: toast-in 0.25s ease;
  max-width: 320px;
}

.toast-exito  { background: var(--exito); }
.toast-error  { background: var(--error); }
.toast-info   { background: var(--azul); }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(16px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ── Carga / skeleton ────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--gris-claro) 25%, #e8eaf0 50%, var(--gris-claro) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.4s infinite;
  border-radius: 4px;
}
@keyframes skeleton-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}