/* IFC Viewer specific styles */
.ifc-section {
    padding: 4rem 0 2rem;
    background: var(--white);
}

.ifc-viewer-container {
    background-color: #fff;
    border: none;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 2rem;
}

.ifc-viewer-frame {
    width: 100%;
    height: 600px;
    border: none;
    display: block;
}

.ifc-controls {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    padding: 1rem;
    background-color: #fff;
    border-radius: 8px;

    margin-bottom: 1rem;
}

.ifc-controls .btn {
    padding: 0.75rem 1.5rem;
    background-color: #2563eb;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: inherit; /* Ensure buttons inherit Inter font */
}

.ifc-controls .btn:hover {
    background-color: #1d4ed8;
    transform: translateY(-1px);

}

.ifc-controls .btn.secondary {
    background-color: #64748b;
    color: white;
}

.ifc-controls .btn.secondary:hover {
    background-color: #475569;

}

.ifc-controls .btn.success {
    background-color: #059669;
    color: white;
}

.ifc-controls .btn.success:hover {
    background-color: #047857;

}

.ifc-controls .btn:active {
    transform: translateY(0);
}

.ifc-controls .btn.secondary {
    background-color: #6c757d;
}

.ifc-controls .btn.secondary:hover {
    background-color: #545b62;
}

/* Model info panel */
.model-info {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: 8px;

    margin-top: 1rem;
}

.model-info h3 {
    margin: 0 0 1rem 0;
    color: #333;
    font-size: 1.2rem;
}

.model-info .info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.model-info .info-item {
    padding: 0.75rem;
    background-color: #f8f9fa;
    border-radius: 4px;
    border-left: 3px solid #28a745;
}

.model-info .info-label {
    font-weight: 600;
    color: #495057;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.model-info .info-value {
    color: #212529;
    font-size: 1rem;
}

/* File upload area */
.ifc-upload {
    background-color: #fff;
    border: 2px dashed #dee2e6;
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 2rem;
    transition: border-color 0.3s ease;
}

.ifc-upload:hover {
    border-color: #28a745;
}

.ifc-upload.dragover {
    border-color: #28a745;
    background-color: #f8fff9;
}

.ifc-upload input[type="file"] {
    display: none;
}

.ifc-upload-label {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: #007bff;
    color: white;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.ifc-upload-label:hover {
    background-color: #0056b3;
}

.ifc-upload-text {
    margin-top: 1rem;
    color: #6c757d;
    font-size: 0.9rem;
}

/* IFC model gallery */
.ifc-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.ifc-gallery-item {
    background-color: #fff;
    border-radius: 8px;

    overflow: hidden;

}

.ifc-gallery-item:hover {
    transform: translateY(-2px);

}

.ifc-gallery-thumb {
    width: 100%;
    height: 150px;
    background-color: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6c757d;
    font-size: 3rem;
    cursor: pointer;
}

.ifc-gallery-info {
    padding: 1rem;
}

.ifc-gallery-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #333;
}

.ifc-gallery-description {
    font-size: 0.9rem;
    color: #6c757d;
    margin-bottom: 0.5rem;
}

.ifc-gallery-meta {
    font-size: 0.8rem;
    color: #999;
    margin-bottom: 1rem;
    font-family: 'Courier New', monospace;
}

.ifc-gallery-meta small {
    background-color: #f8f9fa;
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    border: 1px solid #e9ecef;
}

.ifc-gallery-actions {
    display: flex;
    gap: 0.5rem;
}

.ifc-gallery-actions .btn {
    flex: 1;
    padding: 0.5rem;
    font-size: 0.8rem;
}

/* Upload prompt styling */
.ifc-gallery-item.upload-prompt {
    border: 2px dashed #dee2e6;
    background-color: #f8f9fa;
}

.ifc-gallery-item.upload-prompt:hover {
    border-color: #007bff;
    background-color: #f0f8ff;
}

.ifc-gallery-item.upload-prompt .ifc-gallery-thumb {
    color: #007bff;
    font-size: 2rem;
}

/* Model count indicator */
.ifc-gallery::before {
    content: "Available Models (" attr(data-count) ")";
    display: block;
    font-weight: 600;
    color: #333;
    margin-bottom: 1rem;
    padding: 0.5rem;
    background-color: #f8f9fa;
    border-radius: 4px;
    text-align: center;
}

/* Loading states */
.ifc-loading {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(248, 249, 250, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    backdrop-filter: blur(2px);
}

.loading-content {
    text-align: center;
    max-width: 500px;
    padding: 2rem;
    background-color: white;
    border-radius: 8px;

}

.loading-spinner-ifc {
    width: 60px;
    height: 60px;
    border: 5px solid #e9ecef;
    border-top: 5px solid #28a745;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}

.loading-message {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 1rem;
}

.loading-progress-container {
    margin: 1.5rem 0;
}

.loading-progress-bar {
    width: 100%;
    height: 12px;
    background-color: #e9ecef;
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.loading-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #28a745, #20c997);
    width: 0%;
    transition: width 0.5s ease;
    border-radius: 6px;
}

.loading-percentage {
    font-size: 1rem;
    font-weight: 600;
    color: #28a745;
}

.loading-tips {
    margin-top: 2rem;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: 6px;
    text-align: left;
}

.loading-tips p {
    margin: 0 0 0.5rem 0;
    font-weight: 600;
    color: #495057;
}

.loading-tips ul {
    margin: 0;
    padding-left: 1.5rem;
    color: #6c757d;
    font-size: 0.9rem;
}

.loading-tips li {
    margin-bottom: 0.25rem;
}

.ifc-loading::before {
    display: none;
}

/* Error states */
.ifc-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 600px;
    background-color: #fff5f5;
    color: #dc3545;
    text-align: center;
    padding: 2rem;
}

.ifc-error h3 {
    margin: 0 0 1rem 0;
    color: #dc3545;
}

.ifc-error p {
    margin: 0 0 1rem 0;
    color: #6c757d;
}

/* Responsive design */
@media (max-width: 768px) {
    .ifc-viewer-frame {
        height: 400px;
    }
    
    .ifc-controls {
        gap: 0.5rem;
    }
    
    .ifc-controls .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
    
    .model-info .info-grid {
        grid-template-columns: 1fr;
    }
    
    .ifc-gallery {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .ifc-section {
        padding: 2rem 0;
    }
    
    .ifc-viewer-frame {
        height: 300px;
    }
    
    .ifc-controls {
        flex-direction: column;
    }
    
    .ifc-controls .btn {
        width: 100%;
    }
    
    .ifc-upload {
        padding: 1rem;
    }
}

/* Animation keyframes */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Accessibility improvements */
.ifc-controls .btn:focus,
.ifc-upload-label:focus {
    outline: 2px solid #007bff;
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .ifc-controls,
    .ifc-upload {
        display: none;
    }
    
    .ifc-viewer-frame {
        height: 400px;
        border: 1px solid #000;
    }
}