/* OPOS_NC — Estilos del Panel de Gestión y Login.
   Diseño editorial minimalista: sombras suaves, bordes limpios, píldoras pastel.
*/

/* --- login --- */
.login-caja {
  max-width: 420px;
  margin: 3.5rem auto 0;
  border-radius: var(--radio);
}
.login-titulo {
  margin: 0 0 1.5rem;
  font-size: 1.5rem;
  text-align: center;
  color: var(--brand-dark);
}
.login-error {
  background: var(--error-tint);
  color: var(--error);
  border: 1px solid var(--error-borde);
  border-radius: var(--radio-sm);
  padding: .65rem .85rem;
  margin: 1rem 0 0;
  font-size: .88rem;
  font-weight: 500;
}

/* --- campos de formulario --- */
.campo {
  display: block;
  margin-bottom: 1.2rem;
}
.campo > span {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--texto);
  margin-bottom: .4rem;
}
.campo input, .campo select, .campo textarea {
  width: 100%;
  padding: .65rem .85rem;
  border: 1px solid var(--borde);
  border-radius: var(--radio-sm);
  background: var(--superficie);
  color: var(--texto);
  font: inherit;
  font-size: .95rem;
  box-shadow: var(--sombra-sm);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.campo input:focus, .campo select:focus, .campo textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(0, 109, 104, 0.15);
}
.campo input::placeholder {
  color: var(--texto-suave);
  opacity: .7;
}

.campo--fila {
  display: flex; gap: .6rem; align-items: center;
}
.campo--fila input[type="checkbox"] { width: auto; }
.campo--fila > span { margin-bottom: 0; }

.campo--check {
  display: flex; gap: .65rem; align-items: flex-start;
  cursor: pointer; margin-bottom: 1rem;
}
.campo--check input[type="checkbox"] {
  width: auto; margin: .2rem 0 0; flex-shrink: 0; cursor: pointer;
  accent-color: var(--brand);
}
.campo--check > span {
  display: inline; margin-bottom: 0; font-size: .9rem;
  color: var(--texto); line-height: 1.45;
}

/* --- cabecera del panel --- */
.panel-cabecera {
  background: var(--cabecera-dark, #1A102F);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  position: sticky; top: 0; z-index: 30;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  transition: border-color .2s ease;
}
.panel-cabecera[data-modo="profesor"] {
  border-bottom-color: rgba(16, 185, 129, 0.25);
}
.panel-cabecera-inner {
  display: flex; align-items: center; justify-content: space-between; gap: .75rem;
  padding-top: .5rem; padding-bottom: .5rem;
  min-height: 52px;
}
.panel-cabecera-izq {
  display: flex; align-items: center; gap: .75rem; flex-shrink: 0;
}
.panel-marca {
  font-family: var(--fuente-titulo);
  font-size: 1.15rem; font-weight: 700; color: #FFFFFF;
  letter-spacing: -0.01em;
  display: inline-flex; align-items: center;
}

/* --- Conmutador de modo: Gestión vs Profesor --- */
.panel-modo-switcher {
  display: inline-flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.4);
  padding: 3px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  gap: 2px;
}
.btn-modo-switch {
  background: transparent;
  border: none;
  color: #9CA3AF;
  font-size: .76rem;
  font-weight: 600;
  padding: .22rem .55rem;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  transition: all .18s ease;
  white-space: nowrap;
}
.btn-modo-switch:hover {
  color: #FFFFFF;
}
.btn-modo-switch.activo.modo--admin {
  background: #7C3AED;
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.45);
}
.btn-modo-switch.activo.modo--profesor {
  background: #10B981;
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.45);
}

.panel-nav {
  display: flex; align-items: center; gap: .25rem; flex-wrap: nowrap; flex: 1;
  white-space: nowrap; overflow-x: auto; scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.panel-nav::-webkit-scrollbar {
  display: none;
}
.panel-nav-link {
  padding: .3rem .55rem; border-radius: var(--radio-sm); text-decoration: none;
  color: #D1D5DB; font-size: .82rem; font-weight: 500;
  transition: all .15s ease;
  display: inline-flex; align-items: center; gap: .25rem;
  white-space: nowrap;
}
.panel-nav-link:hover {
  background: rgba(255, 255, 255, 0.1); color: #FFFFFF;
  text-decoration: none;
}
.panel-nav-link.es-activa {
  background: var(--brand); color: #FFFFFF; font-weight: 600;
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.4);
}
.panel-cabecera[data-modo="profesor"] .panel-nav-link.es-activa {
  background: #059669;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.45);
}
.panel-cabecera-derecha {
  display: inline-flex; align-items: center; gap: .5rem; flex-shrink: 0;
}
.panel-usuario-badge {
  display: inline-flex; align-items: center; gap: .45rem;
  color: #E5E7EB; font-size: .82rem; font-weight: 500;
}
@media (max-width: 1250px) {
  .panel-nombre-txt {
    display: none;
  }
}
.panel-avatar {
  width: 26px; height: 26px; border-radius: 50%;
  background: #C08A2E; color: #FFFFFF; font-weight: 700; font-size: .76rem;
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}
.btn-theme-toggle {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  width: 30px; height: 30px;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: .9rem; line-height: 1;
  transition: all .15s ease;
  color: #FFFFFF;
}
.btn-theme-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.08);
}
#panel-salir {
  padding: .35rem .75rem; font-size: .82rem;
  background: transparent; border: 1px solid rgba(255, 255, 255, 0.2);
  color: #E5E7EB;
}
#panel-salir:hover {
  background: rgba(239, 68, 68, 0.2); border-color: #EF4444; color: #FCA5A5;
}

/* --- contenido --- */
.panel-titulo {
  font-size: 1.6rem; margin: 0 0 1.5rem; color: var(--brand-dark);
}
.panel-seccion {
  margin-bottom: 2.25rem;
}
.panel-seccion h2 {
  font-size: 1.15rem; margin: 0 0 .9rem; color: var(--texto);
  font-weight: 600;
}

/* --- métricas / estadísticas --- */
.panel-stats {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem;
}
@media (min-width: 768px) {
  .panel-stats { grid-template-columns: repeat(4, 1fr); }
}
.stat {
  background: var(--superficie); border: 1px solid var(--borde);
  border-radius: var(--radio); padding: 1.25rem 1.5rem;
  box-shadow: var(--sombra-sm);
  transition: transform .15s ease, box-shadow .15s ease;
}
.stat:hover {
  transform: translateY(-2px); box-shadow: var(--sombra);
}
.stat b {
  display: block; font-size: 2rem; line-height: 1.1; font-family: var(--fuente-mono);
  color: var(--brand); font-weight: 600; margin-bottom: .3rem;
}
.stat span {
  color: var(--texto-suave); font-size: .85rem; font-weight: 500;
}

/* --- tablas --- */
.tabla-scroll {
  overflow-x: auto; border: 1px solid var(--borde); border-radius: var(--radio);
  background: var(--superficie); box-shadow: var(--sombra-sm);
}
table.panel-tabla {
  width: 100%; border-collapse: collapse; font-size: .92rem;
}
.panel-tabla th, .panel-tabla td {
  padding: .65rem .75rem; text-align: left; border-bottom: 1px solid var(--borde);
  vertical-align: middle;
}
.panel-tabla th {
  background: #F8FAFC; color: var(--texto-suave); font-size: .76rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .04em;
  white-space: normal; line-height: 1.25;
}
.panel-tabla td {
  white-space: nowrap;
}
.panel-tabla tbody tr {
  transition: background .12s ease;
}
.panel-tabla tbody tr:hover {
  background: #F8FAFC;
}
.panel-tabla tr:last-child td {
  border-bottom: 0;
}
.panel-tabla .btn {
  padding: .25rem .5rem; font-size: .8rem;
}

/* --- badges / píldoras --- */
.pill {
  display: inline-flex; align-items: center; gap: .3rem;
  padding: .2rem .65rem; border-radius: 999px;
  font-size: .78rem; font-weight: 600; border: 1px solid var(--borde);
  background: var(--borde-suave); color: var(--texto-suave);
}
.pill--ok {
  background: var(--ok-tint); color: var(--ok); border-color: var(--ok-borde);
}
.pill--warn {
  background: var(--warn-tint); color: var(--warn); border-color: var(--warn-borde);
}
.pill--err {
  background: var(--error-tint); color: var(--error); border-color: var(--error-borde);
}

/* --- barra de acciones --- */
.barra-acciones {
  display: flex; gap: .65rem; flex-wrap: wrap; margin-bottom: 1rem;
}

/* --- diálogos modales (<dialog>) --- */
dialog.panel-dialog {
  border: 1px solid var(--borde); border-radius: var(--radio);
  background: var(--superficie); color: var(--texto);
  padding: 1.75rem; max-width: 480px; width: 92vw;
  box-shadow: var(--sombra-lg);
}
dialog.panel-dialog::backdrop {
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.panel-dialog h3 {
  margin: 0 0 1.25rem; font-family: var(--fuente-titulo); font-size: 1.35rem;
  font-weight: 600; color: var(--brand-dark);
}
.panel-dialog .barra-acciones {
  margin: 1.5rem 0 0; justify-content: flex-end;
}
dialog.panel-dialog--confirm {
  max-width: 520px;
}
dialog.panel-dialog--confirm .barra-acciones {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  align-items: center;
  flex-wrap: wrap;
}
@media (max-width: 480px) {
  dialog.panel-dialog--confirm .barra-acciones {
    flex-direction: column-reverse;
    align-items: stretch;
  }
  dialog.panel-dialog--confirm .barra-acciones .btn {
    width: 100%;
    justify-content: center;
  }
}