.tool-header {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(16, 185, 129, 0.1));
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-lg);
    border-radius: var(--border-radius);
}
.tool-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}
.tool-icon-large {
    font-size: 3rem;
}
.tool-title h1 {
    margin-bottom: 0.5rem;
}
.tool-title p {
    color: var(--text-muted);
    margin: 0;
}
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-card);
    margin-bottom: var(--spacing-lg);
}
.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}
.upload-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    display: block;
}
.upload-content h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}
.upload-content p {
    color: var(--text-secondary);
}
.controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    flex-wrap: wrap;
}
.control-group {
    flex: 1;
    min-width: 200px;
}
.control-group label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}
input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--bg-secondary);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.2s;
}
.preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}
.preview-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}
.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}
.preview-header h3 {
    font-size: 1rem;
    margin: 0;
    color: var(--text-primary);
}
.file-info {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-family: var(--font-primary);
}
.file-info.highlight {
    color: #10b981;
    font-weight: 600;
}
.image-container {
    padding: var(--spacing-md);
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--bg-primary);
    min-height: 300px;
}
.image-container img {
    max-width: 100%;
    max-height: 400px;
    border-radius: 4px;
    box-shadow: var(--shadow-md);
}
.features-info {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}
.features-info h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}
.features-info ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-sm);
}
.features-info li {
    color: var(--text-secondary);
    padding: 0.5rem 0;
}
@media (max-width: 768px) {
    .preview-grid {
        grid-template-columns: 1fr;
    }
    .controls {
        flex-direction: column;
        align-items: stretch;
    }
}