/**
 * Pages CSS - Estilos específicos de páginas y vistas
 */

/* ============================================
 * HERO SECTION (si se usa en el futuro)
 * ============================================ */

.hero-section {
  background: none;
  min-height: 60vh;
  color: var(--color-white);
  padding-top: 60px;
  padding-bottom: 60px;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('https://images.unsplash.com/photo-1513258496099-48168024aec0?auto=format&fit=crop&w=1200&q=80');
  background-size: cover;
  background-position: center;
  z-index: 0;
  filter: brightness(0.7) blur(1px);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 1;
}

.hero-content {
  z-index: 2;
  position: relative;
}

.hero-section h1 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-extrabold);
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-white);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
}

.hero-section .lead {
  color: var(--text-light);
  font-size: var(--font-size-xl);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
}

/* ============================================
 * LOGIN MODAL (estilo especial)
 * ============================================ */

.login-modal-content {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-2xl);
  border: none;
}

.login-modal-left {
  background: linear-gradient(135deg, var(--color-black) 0%, var(--color-primary) 100%);
  min-height: 420px;
  position: relative;
}

.login-modal-left::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml;utf8,<svg width="400" height="400" xmlns="http://www.w3.org/2000/svg"><circle cx="200" cy="200" r="180" fill="none" stroke="white" stroke-width="8" opacity="0.08"/><circle cx="100" cy="100" r="60" fill="none" stroke="white" stroke-width="4" opacity="0.10"/><circle cx="300" cy="300" r="40" fill="none" stroke="white" stroke-width="3" opacity="0.10"/></svg>');
  background-size: cover;
  opacity: 0.5;
  z-index: 0;
}

.login-modal-left > * {
  z-index: 1;
  position: relative;
}

.login-modal-left h2 {
  color: var(--color-white);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
}

.login-modal-left p {
  color: var(--text-light);
  font-size: var(--font-size-lg);
}

.login-modal-left .logo-hero {
  background: transparent;
  box-shadow: none;
  width: 120px;
  margin-bottom: var(--spacing-4);
}

.login-modal-content .bg-white {
  border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
}

/* ============================================
 * ADMIN PANEL
 * ============================================ */

#adminSection h2 {
  margin-bottom: var(--spacing-6);
}

#adminSection .list-group-item {
  font-size: var(--font-size-lg);
  padding: var(--spacing-4);
}

/* ============================================
 * ENROLLMENT / PLANILLA
 * ============================================ */

#planillaPreview {
  background-color: var(--color-white);
  padding: var(--spacing-6);
}

#planillaPreview .container-fluid {
  max-width: 800px;
  margin: 0 auto;
}

/* Secciones de la planilla */
#planillaPreview .bg-danger {
  background-color: var(--color-primary) !important;
}

/* ============================================
 * DETALLES DEL CURSO (Modal inscripción)
 * ============================================ */

#detallesCurso .card {
  border: 1px solid var(--color-primary);
  background-color: var(--color-gray-100);
}

#detallesCurso p {
  margin-bottom: var(--spacing-2);
}

/* ============================================
 * DASHBOARD WELCOME CARDS
 * ============================================ */

.student-content > .card:first-child,
.prof-content > .card:first-child {
  border-left: 4px solid var(--color-primary);
}

/* ============================================
 * EMPTY STATES
 * ============================================ */

.empty-state {
  text-align: center;
  padding: var(--spacing-16) var(--spacing-8);
  color: var(--text-secondary);
}

.empty-state__icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-4);
  opacity: 0.5;
}

.empty-state__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-2);
  color: var(--text-primary);
}

.empty-state__description {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-6);
}

/* ============================================
 * LOADING STATES
 * ============================================ */

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-8);
}

.loading__spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-gray-300);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ============================================
 * RESPONSIVE ESPECÍFICO DE PÁGINAS
 * ============================================ */

@media (max-width: 767px) {
  .login-modal-content {
    border-radius: var(--radius-lg);
  }

  .login-modal-left,
  .login-modal-content .bg-white {
    border-radius: 0 !important;
  }

  .login-modal-left {
    min-height: 180px;
    padding: var(--spacing-8) var(--spacing-4) !important;
  }

  .login-modal-content .bg-white {
    padding: var(--spacing-8) var(--spacing-4) !important;
  }

  #planillaPreview {
    padding: var(--spacing-3);
    font-size: var(--font-size-sm);
  }

  #planillaPreview .row > div {
    margin-bottom: var(--spacing-2);
  }

  /* Hero section responsive */
  .hero-section {
    min-height: 40vh;
    padding-top: var(--spacing-4);
    padding-bottom: var(--spacing-4);
  }

  .hero-section h1 {
    font-size: var(--font-size-2xl);
  }

  .hero-section .lead {
    font-size: var(--font-size-base);
  }

  /* Empty states responsive */
  .empty-state {
    padding: var(--spacing-8) var(--spacing-4);
  }

  .empty-state__icon {
    font-size: 3rem;
  }

  .empty-state__title {
    font-size: var(--font-size-lg);
  }

  .empty-state__description {
    font-size: var(--font-size-sm);
  }
}

@media (max-width: 576px) {
  .login-modal-left {
    min-height: 150px;
    padding: var(--spacing-4) var(--spacing-3) !important;
  }

  .login-modal-left h2 {
    font-size: var(--font-size-xl);
  }

  .login-modal-left p {
    font-size: var(--font-size-base);
  }

  .login-modal-content .bg-white {
    padding: var(--spacing-4) var(--spacing-3) !important;
  }

  #planillaPreview {
    padding: var(--spacing-2);
    font-size: var(--font-size-xs);
  }

  .hero-section {
    min-height: 30vh;
  }

  .hero-section h1 {
    font-size: var(--font-size-xl);
  }

  .empty-state {
    padding: var(--spacing-4) var(--spacing-2);
  }

  .empty-state__icon {
    font-size: 2.5rem;
  }
}

/* ============================================
 * MODAL CONFIRMAR ELIMINAR ENTREGA (alumno)
 * ============================================ */

.delete-submission-modal .modal-content {
  border: none;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
  overflow: hidden;
}

.delete-submission-modal .modal-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  padding: 1.5rem 1.5rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  border: none;
}

.delete-submission-modal .modal-header .btn-close {
  filter: brightness(0) invert(1);
  opacity: 0.9;
  margin-left: auto;
}

.delete-submission-modal .modal-header .btn-close:hover {
  opacity: 1;
}

.delete-submission-modal .delete-submission-modal__icon {
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.delete-submission-modal .modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  color: white;
}

.delete-submission-modal .modal-body {
  padding: 1.5rem 1.5rem;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-gray-700);
}

.delete-submission-modal .modal-body strong {
  color: var(--color-gray-900);
}

.delete-submission-modal .modal-footer {
  border-top: 1px solid var(--color-gray-200);
  padding: 1rem 1.5rem 1.5rem;
  gap: 0.75rem;
  background: var(--color-gray-100);
}

.delete-submission-modal .modal-footer .btn-secondary {
  border-radius: 10px;
  font-weight: 600;
  padding: 0.5rem 1.25rem;
}

.delete-submission-modal .modal-footer .btn-danger {
  border-radius: 10px;
  font-weight: 600;
  padding: 0.5rem 1.5rem;
  box-shadow: 0 4px 12px rgba(211, 47, 47, 0.35);
}

/* ============================================
 * NOTA DE TAREA (alumno) - Resaltar calificación
 * ============================================ */
.tarea-grade-display {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: linear-gradient(135deg, rgba(211, 47, 47, 0.12) 0%, rgba(211, 47, 47, 0.06) 100%);
  border: 1px solid rgba(211, 47, 47, 0.35);
  border-radius: 10px;
  font-weight: 600;
}
.tarea-grade-display .tarea-grade-label {
  color: var(--color-text, #333);
  font-size: 0.95rem;
}
.tarea-grade-display .tarea-grade-value {
  font-size: 1.35rem;
  color: var(--color-danger, #c62828);
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* ============================================
 * Badge de notificación chat (Preguntas / Responder dudas)
 * Siempre visible en el sidebar cuando hay mensajes nuevos
 * ============================================ */
.unread-chat-badge {
  min-width: 1.4rem;
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.2;
  vertical-align: middle;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.3);
}
.prof-sidebar .unread-chat-badge,
.student-sidebar .unread-chat-badge {
  background-color: #dc3545 !important;
  color: #fff !important;
}