/* Tutor Dashboard - Profile-style Design */

/* Layout Structure */
.dashboard-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  margin-top: 32px;
}

.primary-column {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.right-rail {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 24px;
  height: fit-content;
}

/* Action Bar */
.action-bar {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  color: var(--text-strong);
  flex: 1;
  min-width: 120px;
}

.action-btn:hover {
  background: var(--surface-soft);
  border-color: var(--primary);
  transform: translateY(-1px);
}

.action-btn i {
  font-size: 20px;
  color: var(--primary);
}

.action-btn span {
  font-size: 12px;
  font-weight: 500;
}

/* Up Next Card (Hero) */
.up-next-card {
  position: sticky;
  top: 24px;
  z-index: 10;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-700, #2f49d6) 100%);
  color: white;
  border: none;
}

.up-next-card .card-title { color: #000000; }
.up-next-card .card-subtitle { color: white; }

.up-next-card .btn-primary {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  backdrop-filter: blur(10px);
}

.up-next-card .btn-primary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
}

.up-next-card .btn-primary:disabled {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.6);
}

/* Session Items */
.session-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-100);
}

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

.session-info {
  flex: 1;
}

.session-title {
  font-weight: 600;
  color: var(--text-strong);
  margin: 0 0 4px 0;
}

.session-meta {
  font-size: 14px;
  color: var(--text-soft);
  margin: 0;
}

.session-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* Student Items */
.student-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-100);
}

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

.student-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--surface-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--primary);
}

.student-info {
  flex: 1;
}

.student-name {
  font-weight: 500;
  color: var(--text-strong);
  margin: 0 0 2px 0;
}

.student-subject {
  font-size: 12px;
  color: var(--text-soft);
  margin: 0;
}

.student-actions {
  display: flex;
  gap: 4px;
}

.student-actions .btn {
  padding: 4px 8px;
  font-size: 12px;
  min-width: auto;
}

/* Skeleton Loading */
.skeleton-loader {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px 0;
}

.skeleton-item {
  height: 16px;
  background: linear-gradient(90deg, var(--surface-soft) 25%, var(--border) 50%, var(--surface-soft) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: 4px;
}

.skeleton-item:nth-child(1) { width: 70%; }
.skeleton-item:nth-child(2) { width: 85%; }
.skeleton-item:nth-child(3) { width: 60%; }

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Empty States */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-soft);
}

.empty-state i {
  font-size: 32px;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-state p {
  margin: 0;
  font-size: 14px;
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: var(--surface);
  border-radius: 12px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  max-width: 500px;
  width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 24px 0 24px;
  margin-bottom: 20px;
}

.modal-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-strong);
}

.modal-close {
  background: none;
  border: none;
  padding: 8px;
  border-radius: 6px;
  color: var(--text-soft);
  cursor: pointer;
  font-size: 20px;
  transition: all 0.2s;
}

.modal-close:hover {
  background: var(--surface-soft);
  color: var(--text-strong);
}

.modal-body {
  padding: 0 24px;
}

.modal-footer {
  padding: 20px 24px 24px 24px;
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 500;
  color: var(--text-strong);
  margin-bottom: 6px;
  font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  transition: all 0.2s;
  background: var(--surface);
  box-sizing: border-box;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Toast Container */
#toastContainer {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  box-shadow: var(--shadow-md);
  min-width: 300px;
  animation: toast-slide-in 0.3s ease;
}

.toast.success {
  border-color: var(--success);
  background: #f0fdf4;
}

.toast.error {
  border-color: var(--danger);
  background: #fef2f2;
}

@keyframes toast-slide-in {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* Responsive Design */
@media (max-width: 1024px) {
  .dashboard-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .right-rail {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .action-bar {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 24px;
  }
  
  .action-btn {
    flex: none;
    white-space: nowrap;
    min-width: 100px;
  }
  
  .right-rail {
    grid-template-columns: 1fr;
  }
  
  .up-next-card {
    position: static;
  }
}

@media (max-width: 640px) {
  .profile-content {
    padding: 0 16px;
  }
  
  .dashboard-layout {
    gap: 16px;
  }
  
  .primary-column {
    gap: 16px;
  }
  
  .right-rail {
    gap: 16px;
  }
  
  .modal-content {
    width: 95vw;
    max-height: 90vh;
  }
}

/* Availability Timetable */
.avail-summary-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 12px;
  align-items: start;
}

.avail-day-column {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.avail-day-label {
  font-weight: 600;
  color: var(--text-strong, #0f172a);
  font-size: 12px;
}

.avail-slots {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.avail-chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  border-radius: 10px;
  background: var(--primary-50, #e8efff);
  color: var(--primary-700, #2f49d6);
  border: 1px solid var(--primary-200, #c2d1ff);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.avail-chip.unavailable {
  background: var(--surface-soft, #f8fafc);
  color: var(--text-light, #64748b);
  border-color: var(--border, #e2e8f0);
}

.avail-timezone {
  margin-top: 12px;
  font-size: 12px;
  color: var(--text-light, #64748b);
  text-align: right;
}

@media (max-width: 900px) {
  .avail-summary-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .avail-day-column {
    padding-bottom: 8px;
    border-bottom: 1px dashed var(--border-100, #e2e8f0);
  }
  .avail-day-label {
    font-size: 13px;
  }
}