@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swap');



*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: "Roboto", sans-serif;
}


body{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: blanchedalmond;
}



form{
    width: 500px;
    border: 1px solid orange;
    padding: 20px;
    border-radius: 20px;
}


label, button{
    display: block;

}



input, #student_num span{
    /* width: 100%; */
    padding: 8px;
    margin-bottom: 30px;
    background-color: black;
    width: 50px;
    height: 50px;
    color: aliceblue;
    font-size: 30px;
    text-align: center;



}

button{
    margin: 0 auto;
    padding: 8px;
    font-size: 30px;
    background-color: rgba(53, 0, 137, 0.596);
    border: none;
    color: aliceblue;
    border-radius: 10px;
}


#student_num span {
    border: 2px solid rgb(240, 12, 12);
    display: inline-block;
    line-height: 30px;
}

#student_num {
    margin: 0 20px;
}

.number{
    cursor: pointer;
}