* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 1rem 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.title {
  color: white;
  font-size: 2rem;
  font-weight: 700;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.back-button {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 25px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
  font-weight: 500;
}

.back-button:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

/* Layout principal */
.main-layout {
  display: flex;
  flex: 1;
  gap: 2rem;
  padding: 2rem;
}

/* Sidebar */
.sidebar {
  width: 300px;
  background: white;
  border-radius: 20px;
  padding: 2rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  height: fit-content;
  position: sticky;
  top: 2rem;
}

.teacher-info {
  text-align: center;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 2px solid #f0f0f0;
}

.teacher-avatar {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #2196f3 0%, #1976d2 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  color: white;
}

.teacher-name {
  font-size: 1.3rem;
  font-weight: 600;
  color: #333;
  margin-bottom: 0.5rem;
}

.teacher-department,
.teacher-id {
  color: #666;
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
}

.edit-profile-btn {
  background: linear-gradient(135deg, #2196f3 0%, #1976d2 100%);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 1rem auto 0;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.edit-profile-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(33, 150, 243, 0.3);
}

.quick-stats h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: #333;
}

.stat-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid #f0f0f0;
}

.stat-item:last-child {
  border-bottom: none;
}

.stat-label {
  color: #666;
  font-size: 0.9rem;
}

.stat-value {
  font-weight: 600;
  color: #2196f3;
}

/* Contenido principal */
.main-content {
  flex: 1;
}

.welcome-message {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  padding: 2rem;
  margin-bottom: 2rem;
  color: white;
  text-align: center;
}

.welcome-message h2 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.welcome-message p {
  opacity: 0.9;
  font-size: 1.1rem;
}

/* Grid de tarjetas */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background: white;
  border-radius: 20px;
  padding: 2rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #2196f3, #1976d2);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
}

.card-icon {
  color: #2196f3;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #333;
}

.card-description {
  color: #666;
  font-size: 0.95rem;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.card-badge {
  display: inline-block;
  background: #e3f2fd;
  color: #2196f3;
  padding: 4px 12px;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 500;
}

.card-badge.urgent {
  background: #ffebee;
  color: #f44336;
}

.card-badge.success {
  background: #e8f5e8;
  color: #4caf50;
}

/* Colores específicos para cada tarjeta */
.classes-card .card-icon {
  color: #2196f3;
}
.classes-card::before {
  background: linear-gradient(90deg, #2196f3, #1976d2);
}

.content-card .card-icon {
  color: #9c27b0;
}
.content-card::before {
  background: linear-gradient(90deg, #9c27b0, #7b1fa2);
}

.progress-card .card-icon {
  color: #4caf50;
}
.progress-card::before {
  background: linear-gradient(90deg, #4caf50, #45a049);
}

.reports-card .card-icon {
  color: #ff9800;
}
.reports-card::before {
  background: linear-gradient(90deg, #ff9800, #f57c00);
}

.attendance-card .card-icon {
  color: #607d8b;
}
.attendance-card::before {
  background: linear-gradient(90deg, #607d8b, #455a64);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: white;
  border-radius: 20px;
  width: 90%;
  max-width: 400px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid #f0f0f0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 1.2rem;
  color: #333;
}

.close-modal {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #666;
}

.modal-body {
  padding: 1.5rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: #333;
  font-weight: 500;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 10px;
  border: 2px solid #f0f0f0;
  border-radius: 10px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: #2196f3;
}

.modal-footer {
  padding: 1.5rem;
  border-top: 1px solid #f0f0f0;
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
}

.btn-cancel,
.btn-save {
  padding: 10px 20px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.3s ease;
}

.btn-cancel {
  background: #f5f5f5;
  color: #666;
}

.btn-cancel:hover {
  background: #e0e0e0;
}

.btn-save {
  background: linear-gradient(135deg, #2196f3 0%, #1976d2 100%);
  color: white;
}

.btn-save:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(33, 150, 243, 0.3);
}

/* Responsive */
@media (max-width: 1024px) {
  .main-layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    position: static;
  }

  .cards-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

@media (max-width: 768px) {
  .main-layout {
    padding: 1rem;
  }

  .header {
    padding: 1rem;
  }

  .header-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .title {
    font-size: 1.5rem;
  }

  .sidebar {
    padding: 1.5rem;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 1.5rem;
  }
}

/* Animaciones */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  animation: fadeInUp 0.6s ease forwards;
}

.card:nth-child(1) {
  animation-delay: 0.1s;
}
.card:nth-child(2) {
  animation-delay: 0.2s;
}
.card:nth-child(3) {
  animation-delay: 0.3s;
}
.card:nth-child(4) {
  animation-delay: 0.4s;
}
.card:nth-child(5) {
  animation-delay: 0.5s;
}