body, html{
    background-color: black;
    height: 100%;
    width: 100%;
    margin: 0;
    display: block;
}
.body1{
    background:url(Resourse/firstpage.gif);
    background-color: black;
    background-size: 400px;
    width: 100%;
    display: block;
    margin-left: auto;
    margin-right: auto;
    background-repeat: no-repeat;
    background-position-x: center;
    margin-top: -100px;
}
h1{
    padding-top: 120px;
    color: white;
    text-align: center;
}
.startbutton {
    margin-left: auto;
    margin-right: auto;
    margin-top: 470px;
    margin-bottom: auto;
    display: block;
    text-align: center;
    padding: 10px 30px;
    font-size: 30px;
    color: #15F4EE;
    font-family: poppins;
    font-weight: 800;
    border: 8px solid #15F4EE;
    text-transform: uppercase;
    letter-spacing: 15px;
    cursor: pointer;
    border-radius: 100px;
    transition: 1.5s;
    background-color: black;
}
.startbutton:hover{
    box-shadow: 0 4px 30px 0 #15F4EE inset, 0 4px 30px 0 #15F4EE,
                0 4px 30px 0 #15F4EE inset, 0 4px 30px 0 #15F4EE ;
    text-shadow: 0 0 5px #15F4EE, 0 0 5px #15F4EE;
}
#startpages:link, #startpages:visited {
    text-decoration: none;
    color: #15F4EE;
}
@media only screen and (max-width: 600px) {
    .body1{
        background:url(Resourse/firstpage.gif);
        background-color: black;
        background-size: 400px;
        width: 100%;
        display: block;
        margin-left: auto;
        margin-right: auto;
        background-repeat: no-repeat;
        background-position-x: center;
        margin-top: -100px;
    }
    h1{
        padding-top: 120px;
        color: white;
        text-align: center;
    }
    .startbutton {
        margin-left: auto;
        margin-right: auto;
        margin-top: 480px;
        margin-bottom: auto;
        display: block;
        text-align: center;
        padding: 10px 30px;
        font-size: 30px;
        color: #15F4EE;
        font-family: poppins;
        font-weight: 800;
        border: 8px solid #15F4EE;
        text-transform: uppercase;
        letter-spacing: 15px;
        cursor: pointer;
        border-radius: 100px;
        transition: 1.5s;
        background-color: black;
    }
    .startbutton:hover{
        box-shadow: 0 4px 30px 0 #15F4EE inset, 0 4px 30px 0 #15F4EE,
                    0 4px 30px 0 #15F4EE inset, 0 4px 30px 0 #15F4EE ;
        text-shadow: 0 0 5px #15F4EE, 0 0 5px #15F4EE;
    }
    #startpages:link, #startpages:visited {
        text-decoration: none;
        color: #15F4EE;
    }
}