#serial-validator {
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
}

#serial-number {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
}

button {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}

.success-message {
    color: green;
    font-size: 18px;
    margin-top: 10px;
}

.error-message {
    color: red;
    font-size: 18px;
    margin-top: 10px;
}

.button {
    display: inline-block;
    padding: 5px 10px;
    background-color: #0073AA;
    color: white;
    text-decoration: none;
    border-radius: 3px;
    margin-right: 5px;
}

.button:hover {
    background-color: #005A8C;
}

.form-control {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
}

table {
    width: 100%;
    margin-top: 20px;
    border-collapse: collapse;
}

th, td {
    padding: 10px;
    border: 1px solid #ddd;
}