.body-check {
    font-family: Arial, sans-serif;
    text-align: center;
    margin-top: 20px;
}
.title-box {
    color: #0056b3;
    font-size: 18px;
    font-weight: bold;
}
.container-box {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}
.body-check #phoneNumber {
    padding: 10px;
    width: 250px;
    font-size: 16px;
    border: 2px solid #0056b3;
    border-radius: 5px;
    text-align: left;
    outline: none;
    height: 50px;
    margin: 0;
}
.body-check #phoneNumber::placeholder {
    color: #999;
}
.body-check button {
    font-size: 16px;
    cursor: pointer;
    background-color: #0056b3;
    color: white;
    border: none;
    border-radius: 5px;
    font-weight: bold;
    transition: 0.3s;
    margin: 0;
    height: 50px;
    line-height: 50px;
    padding: 0 30px;
}
.body-check button:hover {
    background-color: #003d82;
}

@media screen and (max-width: 480px) {
    .container-box {
        flex-direction: column;
        width: 100%;
        gap: 5px;
    }
    .body-check #phoneNumber,
    .body-check button {
        width: 100%;
    }
}