html, body{
    background-image: linear-gradient(to top, rgb(3, 129, 202), rgba(143, 223, 255, 0.222));
    height: 100%;
}
.container{
    display: flex;
    position: absolute;
    border: 1px solid;
    border-color: rgb(68, 65, 65);
    top: 250px;
    left: 50%;
    width: 300px;
    height:200px;
    transform: translate(-50%, -30%);
    border-radius: 20px;
}
.container #chieucao{
    width: 50%;
    display: inline-block;
    position: absolute;
    left: 35%;
    background-color: rgb(245, 247, 250);
    border: 1px solid;
    border-radius: 10px;
    font-family: 'Times New Roman', Times, serif;
    font-size:14px;
}
.container #tuoi{
    width: 50%;
    display: inline-block;
    position: absolute;
    left:35%;
    top: 30%;
    background-color:  rgb(245, 247, 250);
    border: 1px solid;
    border-radius: 10px;
    font-size:14px;
}
.container select{
    display: inline-block;
    background-color: rgb(245, 247, 250);
    position: absolute;
    left: 35%;
    top: 15%;
    border: 1px solid;
    border-radius: 15px;
    width: 20%;
    font-size:14px;
}
.container #xu_li{
    width: 30%;
    display: inline-block;
    position: absolute;
    background-color: rgba(0, 0, 0, 0);
    border: 1px solid;
    top: 75%;
    left: 37%;
    border-radius: 10px;
    font-family: 'Times New Roman', Times, serif; 
    font-weight: bold; 
    background-color: rgb(127, 192, 249);
}
.container #labo{
    position: absolute;
    left: 11%;
    top: 15%;
}