.converter-section {
    background: white;
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.converter-section h2 {
    color: #333;
    margin-bottom: 15px;
    text-align: center;
}

.converter-section > p {
    color: #666;
    margin-bottom: 30px;
    text-align: center;
}

.upload-area {
    border: 3px dashed #667eea;
    border-radius: 15px;
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f8f9ff;
}

.upload-area:hover {
    border-color: #764ba2;
    background: #f0f2ff;
}

.upload-area.dragover {
    border-color: #764ba2;
    background: #e8ebff;
    transform: scale(1.02);
}

.upload-content h3 {
    color: #333;
    margin: 20px 0 10px;
    font-size: 1.5rem;
}

.upload-content p {
    color: #666;
    font-size: 1.1rem;
}

.upload-icon {
    margin-bottom: 10px;
}

.file-info {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 30px;
    margin: 30px 0;
    text-align: center;
}

.file-details {
    margin-bottom: 25px;
}

.file-details strong {
    display: block;
    color: #333;
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.file-details span {
    color: #666;
    font-size: 0.9rem;
}

.conversion-options {
    margin-bottom: 25px;
}

.conversion-options label {
    display: inline-block;
    margin-right: 15px;
    color: #333;
    font-weight: bold;
}

.conversion-options select {
    padding: 10px 15px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 16px;
    color: #333;
    background: white;
}

.conversion-options select:focus {
    outline: none;
    border-color: #667eea;
}

.progress-section {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 40px;
    text-align: center;
    margin: 30px 0;
}

.progress-section h3 {
    color: #333;
    margin-bottom: 25px;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: #e1e8ed;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 15px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 10px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-section p {
    color: #666;
    margin: 0;
}

.result-section {
    background: #f8fff8;
    border: 2px solid #48bb78;
    border-radius: 15px;
    padding: 40px;
    text-align: center;
    margin: 30px 0;
}

.result-section h3 {
    color: #38a169;
    margin-bottom: 25px;
}

.result-content {
    display: flex;
    flex-direction: column;
    gap: 25px;
    align-items: center;
}

.download-section {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary, .btn-success, .btn-secondary {
    padding: 15px 30px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    text-decoration: none;
    display: inline-block;
}

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

.btn-success {
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    color: white;
}

.btn-secondary {
    background: #e2e8f0;
    color: #4a5568;
}

.btn-primary:hover, .btn-success:hover, .btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.donation-section {
    margin-top: 40px;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 15px;
    text-align: center;
    border: 2px solid #e1e8ed;
}

.donation-section h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.donation-section p {
    color: #666;
    margin-bottom: 25px;
    line-height: 1.6;
}

.donation-form {
    display: flex;
    justify-content: center;
}

.donation-form form {
    transition: transform 0.3s ease;
}

.donation-form form:hover {
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .converter-section {
        padding: 20px;
    }
    
    .upload-area {
        padding: 40px 15px;
    }
    
    .download-section {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary, .btn-success, .btn-secondary {
        width: 100%;
        margin: 5px 0;
    }
}