style.css

body
{
    background: #283845;
}
.calculator
{
    width: 300px;
    height: 300px;
    border: solid 4px #1c1f33;
    border-radius: 10px;
    margin: auto;
    display: grid;
    grid-template-columns: repeat(4, 25%);
    grid-template-rows: repeat(4, 25%);
}
.text
{
    grid-column: 1/5;
    grid-row: 1/2;
    background: black;
    color: #ba5a31;
    border-radius: 7px 7px 0 0;
    font-family: 'Wallpoet';
    text-align: center;
    font-size: 2em;
}
.text input{
    width: 97%;
    height: 100%;
}

.numbers
{
    grid-row: 2/5;
    grid-column: 1/4;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
}

.operators
{
    grid-column: 4/5;
    grid-row: 2/5;
    display: flex;
    flex-direction: column;
}

.btn, .op-btn
{
    background: #d8dbe2;
    color: black;
    font-size: 2em;
    font-family: 'Wallpoet', Arial, Helvetica, sans-serif;
    flex-basis: 33.3%;
}
.btn-0
{
    border-bottom-left-radius: 10px;
}

.op-btn{flex-basis: 25%;}

#btn-cls{
    flex: 1;
}

#aside-box
{
    position: fixed;
    border-radius: 7px;
    display: none;
}

.aside-icon-box
{
    margin: auto;
    display: flex;
    background: #7fefbd;
    width: 35px;
    height: 35px;
    border-radius: 10px;
    z-index: 1;
}

#aside
{
    width: 25px;
    height: 25px;
    margin: auto;
}

.aside-icon-box:hover{
    animation-duration: 350ms;
    animation-name: aside-box-linear;
    animation-fill-mode: forwards;
}

@keyframes aside-box-linear
{
    100%
    {
        background: #ba5a31;
    }

}

.aside-list-box
{
    background: #7fefbd;
    width: 70px;
    height: 100px;
    position: relative;
    z-index: 2;
    border-radius: 10px;
    display: none;
}
.aside-list
{
    position: relative;
    top: 40%;
}

.aside-link
{
    list-style: none;
    text-decoration: none;
}

.footer-container
{
    width:100%;
    height: 100px;
    margin-top: 2em;
    background: #75abbc;
}

.footer
{
    padding: 50px 0 0 25px;
    font-family: 'Lato', Arial, Helvetica, sans-serif;
}

@media(max-width: 485px)
{
    #game-box-container
    {
        width: 100%;
    }
    #game-box
    {
     margin-top: 10%;
     width: 100%;
    }

    #text
    {
        width: 25%;
        height: 5%;
        bottom:28em;
    }

    #text span
    {
        font-size: 16px;
    }

    .footer
    {
     margin-top: 0;
    }

    #playerColors-container
    {
        margin-top: 25px;
    }
}