/* ============================================
   Lesson Execution Module - Premium CSS
   Módulo de Execução de Aula ao Vivo
   ============================================ */

/* ====== VARIÁVEIS CSS ====== */
:root {
  --lesson-exec-primary: #667eea;
  --lesson-exec-secondary: #764ba2;
  --lesson-exec-gradient: linear-gradient(135deg, var(--lesson-exec-primary) 0%, var(--lesson-exec-secondary) 100%);
  
  --lesson-exec-success: #27ae60;
  --lesson-exec-warning: #f39c12;
  --lesson-exec-error: #e74c3c;
  
  --lesson-exec-surface: #ffffff;
  --lesson-exec-surface-alt: #f8fafc;
  --lesson-exec-border: #e2e8f0;
  --lesson-exec-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --lesson-exec-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  
  --lesson-exec-text: #2d3748;
  --lesson-exec-text-light: #718096;
  --lesson-exec-text-muted: #a0aec0;
  
  --lesson-exec-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ====== CONTAINER PRINCIPAL ====== */
.lesson-execution-module {
  min-height: 100vh;
  background: var(--lesson-exec-surface-alt);
  padding: 1.5rem;
}

.module-isolated-lesson-execution {
  max-width: 1400px;
  margin: 0 auto;
}

/* ====== HEADER PREMIUM ====== */
.lesson-execution-module .module-header-premium {
  background: var(--lesson-exec-gradient);
  color: white;
  padding: 2rem;
  border-radius: 16px;
  margin-bottom: 1.5rem;
  box-shadow: var(--lesson-exec-shadow-lg);
}

.lesson-execution-module .header-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.lesson-execution-module .header-left {
  flex: 1;
}

.lesson-execution-module .module-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
}

.lesson-execution-module .module-title .icon {
  font-size: 2rem;
}

.lesson-execution-module .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  opacity: 0.9;
}

.lesson-execution-module .breadcrumb-item {
  cursor: pointer;
  transition: var(--lesson-exec-transition);
}

.lesson-execution-module .breadcrumb-item:hover:not(.active) {
  text-decoration: underline;
}

.lesson-execution-module .breadcrumb-separator {
  opacity: 0.6;
}

.lesson-execution-module .header-actions {
  display: flex;
  gap: 0.75rem;
}

/* ====== LESSON STATS ====== */
.lesson-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  background: rgba(255, 255, 255, 0.15);
  padding: 1rem;
  border-radius: 12px;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.stat-icon {
  font-size: 1.5rem;
}

.stat-label {
  font-size: 0.875rem;
  opacity: 0.9;
}

.stat-value {
  font-weight: 700;
  font-size: 1.1rem;
}

.stat-value.progress-high {
  color: #2ecc71;
}

.stat-value.progress-medium {
  color: #f1c40f;
}

.stat-value.progress-low {
  color: #e74c3c;
}

.auto-update-indicator {
  opacity: 0.8;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 1; }
}

/* ====== ACTIVITIES SUMMARY ====== */
.activities-summary {
  margin-bottom: 1.5rem;
}

.activities-list {
  display: grid;
  gap: 1rem;
}

.activity-summary-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--lesson-exec-surface-alt);
  border-radius: 12px;
  border: 2px solid var(--lesson-exec-border);
  transition: var(--lesson-exec-transition);
}

.activity-summary-card:hover {
  border-color: var(--lesson-exec-primary);
  box-shadow: var(--lesson-exec-shadow);
  transform: translateY(-2px);
}

.activity-number {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--lesson-exec-gradient);
  color: white;
  font-weight: 700;
  font-size: 1.25rem;
  border-radius: 50%;
  flex-shrink: 0;
}

.activity-info {
  flex: 1;
  min-width: 0;
}

.activity-name {
  font-weight: 600;
  font-size: 1rem;
  color: var(--lesson-exec-text);
  margin-bottom: 0.25rem;
}

.activity-meta {
  font-size: 0.875rem;
  color: var(--lesson-exec-text-light);
}

.activity-progress {
  min-width: 180px;
}

.progress-text {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
}

.completed-fraction {
  font-weight: 600;
  color: var(--lesson-exec-text);
}

.completion-rate {
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  font-size: 0.75rem;
  color: white;
}

.completion-rate.progress-high {
  background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
}

.completion-rate.progress-medium {
  background: linear-gradient(135deg, #f39c12 0%, #f1c40f 100%);
}

.completion-rate.progress-low {
  background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
}

.progress-bar-container {
  width: 100%;
  height: 8px;
  background: var(--lesson-exec-border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s ease, background 0.3s ease;
}

.progress-bar.progress-high {
  background: linear-gradient(90deg, #27ae60 0%, #2ecc71 100%);
}

.progress-bar.progress-medium {
  background: linear-gradient(90deg, #f39c12 0%, #f1c40f 100%);
}

.progress-bar.progress-low {
  background: linear-gradient(90deg, #e74c3c 0%, #c0392b 100%);
}

/* ====== STUDENT GRID ====== */
.student-grid-container .card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.grid-controls {
  display: flex;
  gap: 0.5rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.students-list {
  display: grid;
  gap: 1rem;
}

/* ====== STUDENT CARD ====== */
.student-card {
  background: var(--lesson-exec-surface);
  border: 2px solid var(--lesson-exec-border);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--lesson-exec-transition);
}

.student-card:hover {
  border-color: var(--lesson-exec-primary);
  box-shadow: var(--lesson-exec-shadow-lg);
}

.student-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: var(--lesson-exec-surface-alt);
  border-bottom: 2px solid var(--lesson-exec-border);
}

.student-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.student-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--lesson-exec-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
}

.student-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-placeholder {
  color: white;
  font-size: 1.5rem;
  font-weight: 700;
}

.student-details {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.student-name {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--lesson-exec-text);
}

.student-completion {
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  display: inline-block;
  align-self: flex-start;
}

.student-completion.progress-high {
  background: #d5f4e6;
  color: #27ae60;
}

.student-completion.progress-medium {
  background: #fef5e7;
  color: #f39c12;
}

.student-completion.progress-low {
  background: #fadbd8;
  color: #e74c3c;
}

.btn-expand {
  background: transparent;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.5rem;
  transition: var(--lesson-exec-transition);
}

.btn-expand:hover {
  transform: scale(1.2);
}

/* ====== STUDENT ACTIVITIES ====== */
.student-activities {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.activity-row {
  display: grid;
  grid-template-columns: 50px 1fr auto auto;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid var(--lesson-exec-border);
  transition: var(--lesson-exec-transition);
}

.activity-row:last-child {
  border-bottom: none;
}

.activity-row:hover {
  background: var(--lesson-exec-surface-alt);
}

.activity-row.completed {
  background: #f0fdf4;
}

.activity-row.completed:hover {
  background: #dcfce7;
}

/* Checkbox Custom */
.activity-checkbox {
  display: flex;
  align-items: center;
  justify-content: center;
}

.activity-checkbox input[type="checkbox"] {
  display: none;
}

.checkbox-custom {
  width: 28px;
  height: 28px;
  border: 3px solid var(--lesson-exec-border);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--lesson-exec-transition);
  background: white;
}

.activity-checkbox input[type="checkbox"]:checked + label .checkbox-custom {
  background: var(--lesson-exec-gradient);
  border-color: var(--lesson-exec-primary);
}

.activity-checkbox input[type="checkbox"]:checked + label .checkbox-custom::after {
  content: '✓';
  color: white;
  font-size: 1.25rem;
  font-weight: 700;
}

.checkbox-custom:hover {
  border-color: var(--lesson-exec-primary);
  transform: scale(1.1);
}

/* Activity Name */
.activity-row .activity-name {
  font-weight: 500;
  color: var(--lesson-exec-text);
  font-size: 1rem;
}

/* Star Rating */
.star-rating {
  display: flex;
  gap: 0.25rem;
}

.star-btn {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
  transition: var(--lesson-exec-transition);
  opacity: 0.5;
}

.star-btn.filled {
  opacity: 1;
}

.star-btn:hover {
  transform: scale(1.2);
  opacity: 1;
}

/* Activity Actions */
.activity-actions {
  display: flex;
  gap: 0.5rem;
}

.btn-notes {
  background: transparent;
  border: 2px solid var(--lesson-exec-border);
  border-radius: 8px;
  padding: 0.5rem;
  font-size: 1.25rem;
  cursor: pointer;
  transition: var(--lesson-exec-transition);
}

.btn-notes:hover {
  background: var(--lesson-exec-surface-alt);
  border-color: var(--lesson-exec-primary);
  transform: scale(1.1);
}

.btn-notes.has-notes {
  background: var(--lesson-exec-gradient);
  border-color: var(--lesson-exec-primary);
  color: white;
}

/* ====== MODAL ====== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background: var(--lesson-exec-surface);
  border-radius: 16px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { transform: translateY(50px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 2px solid var(--lesson-exec-border);
  background: var(--lesson-exec-gradient);
  color: white;
}

.modal-header h3 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
}

.btn-close {
  background: transparent;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  transition: var(--lesson-exec-transition);
}

.btn-close:hover {
  transform: scale(1.2);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--lesson-exec-text);
}

.student-name-display,
.activity-name-display {
  padding: 0.75rem;
  background: var(--lesson-exec-surface-alt);
  border-radius: 8px;
  font-weight: 500;
  color: var(--lesson-exec-text);
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--lesson-exec-border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  transition: var(--lesson-exec-transition);
  resize: vertical;
}

.form-control:focus {
  outline: none;
  border-color: var(--lesson-exec-primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  padding: 1.5rem;
  border-top: 2px solid var(--lesson-exec-border);
}

/* ====== EMPTY STATE ====== */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
}

.empty-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-state h4 {
  margin: 0 0 0.5rem 0;
  font-size: 1.25rem;
  color: var(--lesson-exec-text);
}

.empty-state p {
  margin: 0;
  color: var(--lesson-exec-text-light);
}

/* ====== LOADING STATE ====== */
.lesson-execution-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  gap: 1rem;
}

.loading-spinner {
  width: 60px;
  height: 60px;
  border: 6px solid var(--lesson-exec-border);
  border-top-color: var(--lesson-exec-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.lesson-execution-loading p {
  font-size: 1.1rem;
  color: var(--lesson-exec-text-light);
}

/* ====== ERROR STATE ====== */
.lesson-execution-error {
  text-align: center;
  padding: 3rem 1.5rem;
  max-width: 600px;
  margin: 2rem auto;
}

.error-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  color: var(--lesson-exec-error);
}

.lesson-execution-error h3 {
  margin: 0 0 1rem 0;
  font-size: 1.5rem;
  color: var(--lesson-exec-text);
}

.lesson-execution-error p {
  margin: 0 0 1.5rem 0;
  color: var(--lesson-exec-text-light);
}

.lesson-execution-error .btn-primary,
.lesson-execution-error .btn-secondary {
  margin: 0.5rem;
}

/* ====== BUTTONS ====== */
.btn-primary,
.btn-secondary {
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--lesson-exec-transition);
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--lesson-exec-gradient);
  color: white;
}

.btn-primary:hover {
  box-shadow: var(--lesson-exec-shadow-lg);
  transform: translateY(-2px);
}

.btn-secondary {
  background: white;
  color: var(--lesson-exec-text);
  border: 2px solid var(--lesson-exec-border);
}

.btn-secondary:hover {
  background: var(--lesson-exec-surface-alt);
  border-color: var(--lesson-exec-primary);
}

.btn-icon {
  background: transparent;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  font-size: 1.25rem;
  transition: var(--lesson-exec-transition);
}

.btn-icon:hover {
  transform: scale(1.1);
}

/* ====== RESPONSIVE ====== */
@media (max-width: 1024px) {
  .lesson-execution-module {
    padding: 1rem;
  }
  
  .activity-summary-card {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .activity-progress {
    width: 100%;
  }
}

@media (max-width: 768px) {
  .lesson-execution-module .header-content {
    flex-direction: column;
    gap: 1rem;
  }
  
  .lesson-stats {
    grid-template-columns: 1fr;
  }
  
  .activity-row {
    grid-template-columns: 40px 1fr;
    gap: 0.5rem;
  }
  
  .activity-rating,
  .activity-actions {
    grid-column: 2;
    margin-top: 0.5rem;
  }
  
  .star-btn {
    font-size: 1.25rem;
  }
  
  .grid-controls {
    flex-direction: column;
    width: 100%;
  }
  
  .btn-sm {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .lesson-execution-module .module-title {
    font-size: 1.5rem;
  }
  
  .activity-number {
    width: 30px;
    height: 30px;
    font-size: 1rem;
  }
  
  .activity-name {
    font-size: 0.875rem;
  }
  
  .student-avatar {
    width: 40px;
    height: 40px;
  }
  
  .modal-content {
    width: 95%;
  }
}