/* Modal Overlay */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
}

.modal.active {
  display: flex;
  animation: fadeIn var(--transition-base);
}

.modal.closing {
  display: flex;
  animation: fadeOut var(--transition-base);
}

/* Settings Modal - Sidebar Style */
#settingsModal {
  justify-content: flex-end;
  padding: 0;
}

#settingsModal.active {
  display: flex;
}

#settingsModal .modal-content {
  max-width: 400px;
  width: 100%;
  height: 100vh;
  max-height: 100vh;
  border-radius: 0;
  margin: 0;
  overflow-y: auto;
}

/* Custom scrollbar for settings modal */
#settingsModal .modal-content::-webkit-scrollbar {
  width: 8px;
}

#settingsModal .modal-content::-webkit-scrollbar-track {
  background: var(--color-background);
  border-radius: var(--radius-sm);
}

#settingsModal .modal-content::-webkit-scrollbar-thumb {
  background: var(--color-accent);
  border-radius: var(--radius-sm);
}

#settingsModal .modal-content::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

/* Firefox scrollbar */
#settingsModal .modal-content {
  scrollbar-width: thin;
  scrollbar-color: var(--color-accent) var(--color-background);
}

#settingsModal.active .modal-content {
  animation: slideInRight var(--transition-base);
}

#settingsModal.closing .modal-content {
  animation: slideOutRight var(--transition-base);
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOutRight {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

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

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

/* Modal Content */
.modal-content {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xl);
  animation: slideUp var(--transition-base);
}

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Modal Header */
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.modal-subtitle {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  font-size: 0.9rem;
}

.close-btn {
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--color-text-light);
  cursor: pointer;
  line-height: 1;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.close-btn:hover {
  background: var(--color-background);
  color: var(--color-primary);
}

/* Exercise Cards */
.exercise-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  overflow-y: auto;
  flex: 1;
  min-height: 0;
  padding: 4px; /* Prevent hover transform and selection outline from being cut off */
}

.exercise-card {
  background: var(--color-background);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.exercise-card:hover {
  border-color: var(--color-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.exercise-card.selected {
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 10%, var(--color-surface));
  box-shadow: 0 0 0 2px var(--color-accent), var(--shadow-md);
}

.exercise-card-header {
  display: flex;
  align-items: start;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.exercise-badge {
  background: var(--color-primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.exercise-badge.office {
  background: var(--color-secondary);
}

.exercise-badge.home {
  background: var(--color-accent);
}

.exercise-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
  flex: 1;
}

.exercise-meta {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.exercise-instructions {
  font-size: 0.8rem;
  color: var(--color-text);
  line-height: 1.5;
  white-space: pre-line;
}

.exercise-difficulty {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
}

.exercise-difficulty.easy {
  background: #D5F4E6;
  color: #27AE60;
}

.exercise-difficulty.medium {
  background: #FCF3CF;
  color: #F39C12;
}

.exercise-difficulty.hard {
  background: #FADBD8;
  color: #E74C3C;
}

/* Modal Actions */
.modal-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  margin-top: var(--spacing-md);
  flex-shrink: 0;
}

/* Settings Form */
.settings-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-group label {
  font-weight: 500;
  color: var(--color-primary);
  font-size: 0.875rem;
}

.form-group input[type="number"] {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: var(--spacing-md);
  border: 1px solid #BDC3C7;
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}

.form-group input[type="number"]:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 10%, transparent);
}

.checkbox-group label {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--spacing-md);
  cursor: pointer;
  margin: 0;
}

.checkbox-group input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--color-accent);
  flex-shrink: 0;
  margin: 0;
}

.theme-select {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: var(--spacing-md);
  border: 1px solid #BDC3C7;
  border-radius: var(--radius-md);
  background: white;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.theme-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 10%, transparent);
}

/* Responsive */
@media (max-width: 640px) {
  .modal-content {
    padding: var(--spacing-lg);
  }

  .modal-title {
    font-size: 1.5rem;
  }

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

  .modal-actions {
    flex-direction: column-reverse;
  }

  .modal-actions .btn {
    width: 100%;
  }
}