/* css/style.css */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

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

.upload-section {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.drop-zone {
    border: 2px dashed #ccc;
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #fafafa;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: #667eea;
    background: #f0f3ff;
}

.drop-zone-content {
    color: #666;
}

.upload-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

.small {
    font-size: 0.85rem;
    color: #999;
    margin-top: 0.5rem;
}

.file-list {
    margin: 1rem 0;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem;
    background: #f5f5f5;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

.file-name {
    flex: 1;
    margin-right: 1rem;
}

.file-size {
    color: #666;
    font-size: 0.85rem;
}

.remove-file {
    color: #ff4444;
    cursor: pointer;
    font-weight: bold;
    padding: 0 0.5rem;
}

.options {
    margin: 1rem 0;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 4px;
}

.options label {
    display: block;
    margin: 0.5rem 0;
    cursor: pointer;
}

.options input[type="checkbox"] {
    margin-right: 0.5rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: #5a67d8;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.loading-spinner {
    display: inline-block;
    animation: spin 1s linear infinite;
}

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

.result-section {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.result-section h2 {
    margin-bottom: 1rem;
    color: #333;
}

.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.download-links {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.download-link {
    display: block;
    padding: 1rem;
    background: #f0f3ff;
    border: 1px solid #667eea;
    border-radius: 4px;
    color: #667eea;
    text-decoration: none;
    text-align: center;
    transition: all 0.3s ease;
}

.download-link:hover {
    background: #667eea;
    color: white;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
}