main {
    margin: 50px 0;
    background-color: #dbedf9;
    font-family: Arial, Helvetica, sans-serif;
    border-top: 1px solid black;
    padding-bottom: 5px;
}

main .container {
    background-color: white;
    margin: 50px auto;
    width: 600px;
    border: 1px solid #cccccc;
    border-radius: 8px;
    padding: 10px;
}

.container .register-form {
    width: 100%;
    margin: 20px auto;
}

.register-form h2 {
    text-align: center;
    color: #009999;
}

main .row {
    margin: 15px 0;
}

main .row label {
    text-align: right;
    display: inline-block;
    width: 24%;
}

main #gioitinh label:first-child{
    margin-left: 13%;
}

main .row input {
    width: 71%;
    height: 30px;
    font-size: 15px;
}

main .row span {
    color: red;
}

main .row div {
    margin-left: 25%;
}

main h4 {
    text-align: center;
    color: #009999;
}

main #ngaysinh {
    width: 120px;
}

main #gioitinh label {
    display: inline;
}

main #gioitinh input {
    width: 15px;
    height: 15px;
}

main .row:last-child {
    text-align: center;
}

main .row:last-child button {
    color: white;
    background-color: #009999;
    border-radius: 5px;
    border: none;
    font-size: 17px;
    padding: 6px 8px;
    margin: 0 2px;
}

@media (max-width:688px) {
    main .container {
        width: 80%;
    }
}

@media (max-width:558px) {
    main .row label {
        width: 100%;
        text-align: left;
    }

    main #gioitinh label:first-child{
        margin-left: 0;
    }

    main .row input {
        width: 93%;
    }

    main .row div {
        margin-left: 0;
    }
}