body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    text-align: center;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

input, button {
    margin: 10px 0;
    padding: 10px;
    width: 100%;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background-color: #0056b3;
}

#certificates {
    margin-top: 20px;
    text-align: left;
    list-style-type: none;
    padding: 0;
}

.certificate {
    border: 2px solid black;
    padding: 20px;
    margin: 10px 0;
    background: #fff;
    border-radius: 5px;
}

#verificationResult {
    font-weight: bold;
    margin-top: 10px;
}