* {
    text-align: center;
}

.main {
    margin: auto;
    display: flex;
    height: 300px;
    width: 250px;
}

div .btn {
    height: 100px;
    width: 100px;
    margin: 20px;
    border-radius: 9px;
    border: 3px solid rgba(3, 3, 37, 0.155);
}
div .st {
    background-color: rgb(234, 50, 13);
}
div .nd {
    background-color: blue;
}
div .rd {
    background-color: rgb(229, 171, 25);
}
div .th {
    background-color: rgb(24, 181, 63);
}
div .flash {
    background-color: rgb(0, 0, 0);
    border: solid rgb(56, 53, 53);
    transition: 2s;
}
div .userflash {
    background-color: rgb(146, 186, 153);
   
}
@media only screen and (max-width: 500px) {
    .main{
        margin-left: 27px;
    }
}
h4{
    color: forestgreen;
}
footer{
    margin-top: 175px;
}
button{
    background-color: aqua;
    border-radius: 20px;
}
.ab{
    display: none;
}
.help{
    display: block;
}