/* Header */
.header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  background-color: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] .header {
  background-color: rgba(26, 26, 26, 0.95);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.header-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}

.header-actions {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--text-base);
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  font-family: inherit;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
}

.btn-secondary {
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-text-tertiary);
}

.btn-danger {
  background-color: var(--color-error);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background-color: #b91c1c;
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
}

.btn-sm {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--text-sm);
}

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--text-lg);
}

/* Icon Button */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: none;
  border-radius: var(--radius-md);
  background-color: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
}

/* Form Elements */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  font-family: inherit;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
  width: 1.125rem;
  height: 1.125rem;
  cursor: pointer;
  accent-color: var(--color-primary);
}

/* Card */
.card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  margin-bottom: var(--space-lg);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.card-description {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  margin-bottom: 0;
}

/* Progress Bar */
.progress {
  width: 100%;
  height: 0.5rem;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-md);
}

.progress-bar {
  height: 100%;
  background-color: var(--color-primary);
  transition: width var(--transition-slow);
  border-radius: var(--radius-lg);
}

.progress-bar.success {
  background-color: var(--color-success);
}

.progress-bar.warning {
  background-color: var(--color-warning);
}

.progress-bar.error {
  background-color: var(--color-error);
}

/* Progress Steps */
.progress-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.progress-step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-secondary);
}

.progress-step.active {
  background-color: var(--color-primary-light);
  border: 1px solid var(--color-primary);
}

.progress-step.completed {
  background-color: var(--color-success-light);
}

.progress-step-icon {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
}

.progress-step-content {
  flex: 1;
}

.progress-step-title {
  font-weight: 500;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.progress-step-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  padding: var(--space-md);
  animation: fadeIn var(--transition-fast);
}

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

.modal {
  background-color: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp var(--transition-base);
}

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

.modal-header {
  padding: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: var(--text-xl);
  font-weight: 600;
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--text-2xl);
  cursor: pointer;
  color: var(--color-text-secondary);
  padding: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}

.modal-close:hover {
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
}

.modal-body {
  padding: var(--space-xl);
}

.modal-footer {
  padding: var(--space-xl);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-md);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-md);
  line-height: 1;
}

.badge-primary {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.badge-success {
  background-color: var(--color-success-light);
  color: var(--color-success);
}

.badge-warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning);
}

.badge-error {
  background-color: var(--color-error-light);
  color: var(--color-error);
}

/* List Items */
.list-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.list-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.list-item-content {
  flex: 1;
  min-width: 0;
}

.list-item-title {
  font-weight: 500;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.list-item-meta {
  display: flex;
  gap: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* Alert */
.alert {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid;
  margin-bottom: var(--space-md);
}

.alert-info {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.alert-success {
  background-color: var(--color-success-light);
  border-color: var(--color-success);
  color: var(--color-success);
}

.alert-warning {
  background-color: var(--color-warning-light);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.alert-error {
  background-color: var(--color-error-light);
  border-color: var(--color-error);
  color: var(--color-error);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--color-text-secondary);
}

.empty-state-icon {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

.empty-state-title {
  font-size: var(--text-lg);
  font-weight: 500;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.empty-state-description {
  margin-bottom: var(--space-lg);
}

/* Markdown Content */
.markdown-content {
  line-height: var(--leading-relaxed);
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3 {
  margin-top: var(--space-xl);
}

.markdown-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-md);
  margin-left: 0;
  color: var(--color-text-secondary);
}

.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-md);
}

.markdown-content th,
.markdown-content td {
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  text-align: left;
}

.markdown-content th {
  background-color: var(--color-bg-secondary);
  font-weight: 600;
}

/* Theme Toggle */
.theme-toggle {
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
}

.theme-toggle-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle-icon.hidden {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.5);
}

/* Responsive */
@media (max-width: 768px) {
  .card {
    padding: var(--space-md);
  }

  .modal {
    margin: var(--space-md);
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding: var(--space-md);
  }

  .btn {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-sm);
  }

  .header-title {
    font-size: var(--text-lg);
  }
}

/* Additional animations for toast notifications */
@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;
  }
}