#button_left
{
    border-right-style: solid;
    border-right-width: 0px;
    border-right-color: white;
    float: left;
    animation: buttons_start 2s;
    margin-right: 5%;
    
}


#button_none
{
    animation: buttons_start 2s;
    margin-right: 5%;
}


#header_button /*<a></a>*/
{
    font-size: 30px;
    color: rgb(110, 110, 110);
    text-decoration: none;
    
    transition: 1s;
    font-family: "Orbitron" sans-serif;
    text-shadow: none;
}

#header_button:active
{
    text-shadow: 0 0 5px rgb(178, 32, 32);
}
#header_button:hover:active
{
    text-shadow: 0 0 5px rgb(178, 32, 32);
}

#header_button:visited /*<a></a>*/
{
    font-size: 30px;
    color: rgb(110, 110, 110);
    text-decoration: none;
    font-family: "Orbitron" sans-serif;
    transition: 1s;
    text-shadow: none;
    cursor: pointer;
    user-select: none;
}

#header_button:hover
{
    font-size: 32px;
    transition: 0.5s;
    color:white;
    text-shadow: 0 0 5px lightseagreen;
    font-family: "Orbitron" sans-serif;
    cursor: pointer;
    user-select: none;
}

@keyframes buttons_start
{
    from
    {
        filter:blur(20px);
    }

    to
    {
        filter:blur(0px);
    }
}