/* Node Editor Modal Styles */

.node-editor-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 10000;
    overflow-y: auto;
    padding: 20px;
}

.node-editor-modal.active {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.node-editor-content {
    background: white;
    border-radius: 12px;
    width: 100%;
    max-width: 800px;
    margin: 40px auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.node-editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 30px;
    border-bottom: 1px solid #e0e0e0;
}

.node-editor-header h2 {
    margin: 0;
    font-size: 24px;
    color: #2d3436;
}

.node-editor-form {
    padding: 30px;
    max-height: calc(100vh - 200px);
    overflow-y: auto;
}

.form-section {
    margin-bottom: 30px;
}

.form-section h3 {
    font-size: 18px;
    color: #2d3436;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #667eea;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #2d3436;
    margin-bottom: 8px;
}

.required {
    color: #e74c3c;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #dfe6e9;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* Domain Checkboxes */
.domain-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.domain-checkboxes label {
    display: flex;
    align-items: center;
    padding: 12px;
    border: 1px solid #dfe6e9;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.domain-checkboxes label:hover {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.05);
}

.domain-checkboxes input[type="checkbox"] {
    margin-right: 10px;
    cursor: pointer;
}

.domain-checkboxes label:has(input:checked) {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.1);
    font-weight: 500;
}

/* Formula Preview */
.formula-preview {
    margin-top: 10px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    min-height: 50px;
    font-size: 16px;
}

.formula-preview:empty {
    display: none;
}

.formula-preview .error {
    color: #e74c3c;
}

/* Prerequisites Selector */
.prerequisites-selector {
    border: 1px solid #dfe6e9;
    border-radius: 8px;
    padding: 15px;
    background: #f8f9fa;
}

#prerequisiteSearch {
    width: 100%;
    padding: 10px;
    border: 1px solid #dfe6e9;
    border-radius: 6px;
    margin-bottom: 10px;
}

.prerequisites-list {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: 15px;
}

.prerequisite-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
    background: white;
    border: 1px solid #dfe6e9;
    border-radius: 6px;
    margin-bottom: 8px;
}

.prerequisite-name {
    font-weight: 500;
    color: #2d3436;
}

.prerequisite-id {
    font-size: 12px;
    color: #636e72;
    margin-left: 10px;
}

.btn-add-prerequisite {
    padding: 6px 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: background 0.3s;
}

.btn-add-prerequisite:hover {
    background: #5568d3;
}

.selected-prerequisites {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.selected-prerequisite-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: #667eea;
    color: white;
    border-radius: 20px;
    font-size: 13px;
}

.btn-remove-prerequisite {
    background: none;
    border: none;
    color: white;
    font-size: 18px;
    cursor: pointer;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s;
}

.btn-remove-prerequisite:hover {
    background: rgba(255, 255, 255, 0.2);
}

.no-prerequisites,
.no-results {
    text-align: center;
    color: #636e72;
    padding: 20px;
    font-style: italic;
}

/* Form Actions */
.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e0e0e0;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    background: #f8f9fa;
    color: #2d3436;
    border: 1px solid #dfe6e9;
}

.btn-secondary:hover {
    background: #e9ecef;
}

/* Form Errors */
.form-errors {
    display: none;
    margin-top: 20px;
}

.error-message {
    padding: 12px;
    background: #fee;
    border-left: 4px solid #e74c3c;
    color: #c0392b;
    margin-bottom: 10px;
    border-radius: 4px;
}

.success-message {
    padding: 12px;
    background: #d4edda;
    border-left: 4px solid #27ae60;
    color: #155724;
    border-radius: 4px;
}

/* Responsive */
@media (max-width: 768px) {
    .node-editor-content {
        margin: 20px auto;
    }
    
    .node-editor-header {
        padding: 20px;
    }
    
    .node-editor-form {
        padding: 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}