@media (max-width:500px) {
    h2 {
        color:white;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        font-weight: 500;
        height:auto;
        width: 100%;
        margin:auto;
        margin-top:50px;
        text-align: center;
    }
}
@media (min-width:501px) and (max-width:1000px) {
    h2 {
        color:white;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        font-weight: 500;
        height:auto;
        width: 100%;
        margin:auto;
        margin-top:50px;
        text-align: center;
    }
}
@media (min-width:1001px) {
    h2 {
        color:white;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        font-weight: 500;
        height:auto;
        width: 100%;
        margin-top:50px;
        text-align: left;
        margin-left: 20%
    }
}
header h1 {
    margin-top:150px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-weight: 600;
    color:white;
    width: 100%;
    font-size: 3em;
    text-align: center;
}
hr {
    width: 50%;
    color:white;
    margin-left:25%;
    margin-top:30px;
}
h2#first {
    margin-top:150px !important;
}
h2#last {
    margin-bottom: 50px !important;
}