.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
}

.h1frontpage {
    color: #2c3e50;
    font-size: 2.5em;
    margin-bottom: 30px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    margin-top: 20px;
}

h2 {
    color: #3498db;
    font-size: 1.8em;
    margin-bottom: 20px;
}

.section1 {
    background-color: #ffffff;
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.drop-area {
    border: 3px dashed #3498db;
    border-radius: 20px;
    padding: 40px 20px;
    margin: 20px auto;
    max-width: 400px;
    transition: all 0.3s ease;
    background-color: #ecf0f1;
    cursor: pointer;
}

.drop-area:hover {
    background-color: #d6eaf8;
    border-color: #2980b9;
}

.drop-area p {
    font-size: 1.2em;
    color: #7f8c8d;
    margin: 0;
}

.thumbnail1-uf1box {
    margin-top: 20px;
}

#thumbnail1-uf1 {
    max-width: 200px;
    max-height: 200px;
    display: none;
    margin: 0 auto;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.metadata-container {
    margin-top: 30px;
    text-align: left;
    display: none;
}

.metadata-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.metadata-item {
    background-color: #f8f9fa;
    padding: 10px;
    border-radius: 5px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.unsupported-file {
    color: #e74c3c;
}

.error-message {
    color: #e74c3c;
    font-weight: bold;
}

.info-box {
    background-color: #e8f4f8;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.link {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.link:hover {
    color: #2980b9;
    text-decoration: underline;
}

@media (max-width: 600px) {
    .container {
        padding: 10px;
    }

    .h1frontpage {
        font-size: 2em;
    }

    .drop-area {
        padding: 20px;
    }

    .metadata-grid {
        grid-template-columns: 1fr;
    }
}