body {
    background-color: #f8f9fa;
    font-family: 'Helvetica Neue', Arial, sans-serif;
}

.card {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: none;
    border-radius: 10px;
}

.card-header {
    background-color: #f1f8ff;
    border-bottom: 1px solid #e3f2fd;
    border-radius: 10px 10px 0 0 !important;
}

.btn-primary {
    background-color: #4285f4;
    border-color: #4285f4;
}

.btn-primary:hover {
    background-color: #3367d6;
    border-color: #3367d6;
}

.progress {
    height: 25px;
    border-radius: 5px;
}

.progress-bar {
    background-color: #4285f4;
}

#download-links {
    margin-top: 15px;
}

.download-link {
    margin: 5px;
}

.form-control:focus {
    border-color: #4285f4;
    box-shadow: 0 0 0 0.25rem rgba(66, 133, 244, 0.25);
}

.form-check-input:checked {
    background-color: #4285f4;
    border-color: #4285f4;
}

/* タブのスタイル */
.nav-tabs .nav-link {
    color: #495057;
    font-weight: 500;
}

.nav-tabs .nav-link.active {
    color: #4285f4;
    border-color: #e3f2fd #e3f2fd #fff;
}

.tab-content {
    padding-top: 20px;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .card {
        margin-bottom: 20px;
    }
}