h1 {
    text-align: center;
}

p {
    font-size: 16px;
}

#phep-toan {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 10px;
}

#ket-qua-nhap {
    width: 100px;
    padding: 5px;
    margin-bottom: 10px;
}

#thong-bao {
    font-size: 18px;
    font-weight: bold;
    margin-top: 10px;
}

#so-cau-dung {
    font-size: 18px;
    font-weight: bold;
    margin-top: 10px;
    float: left;
}

#so-cau-sai {
    font-size: 18px;
    font-weight: bold;
    margin-top: 10px;
    float: right;
}