@media screen 
   and (min-device-width: 450px)  
   { 
    .button a
    {
        font-size: 65px;
    }
    .button
    {
        border-top: solid 8px;
        max-width: 65vh;
    }
    #arrow_bottom
    {
        size: 5px;
    }

}

@media screen 
  and (max-device-width: 449px)   { 
    .button a
    {
        font-size: 110px;
    }
    .button
    {
        border-top: solid 15px;
        max-width: 100%;
    }
    #arrow_bottom
    {
        size: 10px;
    }
}


.button {
    font-family: 'bold';
    width : 100%;
    flex : 0 0 15%;
    max-height: 10vh;
    display: flex;
    justify-content: center;
    position: fixed;
    bottom: 0px;
    background-color: #f3f3f3;
    z-index: 3;
}

.button a {
    font-size: 5vh;
    text-decoration: none;
    color: black;
}

.link{
    display: flex;
    justify-content: space-around;
    align-items: center;
    width: 80%;
    height: 100%;
}

#arrow_bottom {
    width: 12%;
}