* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

header {
    text-align: center;
    padding: 30px 20px;
    background: linear-gradient(135deg, #6a89cc 0%, #4a69bd 100%);
    color: white;
}

header h1 {
    font-size: 2.2rem;
    margin-bottom: 8px;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.upload-area {
    border: 2px dashed #cbd5e0;
    border-radius: 8px;
    margin: 30px;
    padding: 40px 20px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.upload-area:hover {
    border-color: #6a89cc;
    background-color: #f8fafc;
}

.upload-area.dragover {
    border-color: #4a69bd;
    background-color: #edf2f7;
}

.upload-content svg {
    color: #a0aec0;
    margin-bottom: 15px;
}

.upload-content h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: #4a5568;
}

.upload-content p {
    color: #718096;
    font-size: 0.95rem;
}

#fileInput {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.controls {
    padding: 0 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.control-group {
    background-color: #f8fafc;
    border-radius: 8px;
    padding: 20px;
}

.control-group h3 {
    margin-bottom: 15px;
    color: #4a5568;
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 8px;
}

.control-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
}

.control-item label {
    font-weight: 500;
    color: #4a5568;
    min-width: 120px;
}

.control-item input[type="range"] {
    flex: 1;
    margin: 0 10px;
}

.control-item input[type="number"] {
    width: 80px;
    padding: 5px 10px;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
}

.control-item select {
    padding: 5px 10px;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    background-color: white;
}

.control-actions {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    gap: 15px;
    padding-top: 15px;
    border-top: 1px solid #e2e8f0;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn.primary {
    background-color: #4a69bd;
    color: white;
}

.btn.primary:hover {
    background-color: #3c5aa8;
}

.btn.secondary {
    background-color: #48bb78;
    color: white;
}

.btn.secondary:hover {
    background-color: #38a169;
}

.btn:not(.primary):not(.secondary) {
    background-color: #e2e8f0;
    color: #4a5568;
}

.btn:not(.primary):not(.secondary):hover {
    background-color: #cbd5e0;
}

.btn:disabled {
    background-color: #a0aec0;
    cursor: not-allowed;
}

.preview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    padding: 0 30px 30px;
}

.preview-item h3 {
    margin-bottom: 15px;
    color: #4a5568;
    text-align: center;
}

.image-container {
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 10px;
    background-color: #f8fafc;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 300px;
    overflow: hidden;
}

.image-container img,
.image-container canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.image-info {
    margin-top: 10px;
    font-size: 0.9rem;
    color: #718096;
    text-align: center;
}

footer {
    text-align: center;
    padding: 20px;
    background-color: #f8fafc;
    color: #718096;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .preview {
        grid-template-columns: 1fr;
    }
    
    .controls {
        grid-template-columns: 1fr;
    }
    
    .control-actions {
        flex-direction: column;
    }
}