* {
    box-sizing: border-box;
}

body {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    background-image: url("car5_porsche.jpg"); /*A silver car, dark background with some gradients*/
    background-repeat: no-repeat;
    background-attachment: fixed; /*image does not move with screen size*/
    background-size: cover; /*background image cover the whole area*/
}

/*Mobile display styling start*/

/*This is a styling of a mobile navigation*/
.mobile {
    display: none;
}

.sidepanel  {
    width: 0;
    position: fixed;
    z-index: 1;
    height: 100%;
    top: 0;
    left: 0;
    background-color: #111;
    overflow-x: hidden;
    transition: 0.5s;
    padding-top: 60px;
    opacity: 90%;
}

.sidepanel a {
    padding: 8px 8px 8px 32px;
    text-decoration: none;
    color: #fffefe;
    display: block;
    transition: 0.3s;
}

.sidepanel a:hover {
    color: #ccef74;
    font-size: 110%;
}

.sidepanel .closebtn {
    position: absolute;
    top: 0;
    right: 25px;
    font-size: 36px;
}

.openbtn {
    font-size: 20px;
    cursor: pointer;
    background-color: #111;
    color: white;
    padding: 10px 15px;
    border: none;
}

.openbtn:hover {
    background-color:#444;
}

/*Mobile display styling end*/

.nav {
    background-color: #252525;
    border-radius: 20px;
    padding: 15px 15px;
    width: 90%;
    text-align: center;
    margin: auto;
    font-size: 90%;
}

.nav a {
    text-decoration: none;
    color: white;
}

.nav a:hover {
    color: #ccef74;
    font-size: 110%;
}

.menuitem {
    padding: 0px 2%;
}

.hero { /*This is the main headline on a website (with big fonts)*/
    margin-left: 33%;
    margin-top: 5%;
    width: 45%;
    font-size: 250%;
    color: white;
}

.bottom { /*Bottom part of the page having two parts left and right*/
    width: 100%;
    font-size: 80%;
    position: fixed; 
    bottom: 0px;
    left: 0px;      /*Div remains at a fixed position, at the bottom 0px and at the left 0px*/
    opacity: 80%;
}

.sub-heading { /*Left part of the bottom*/
    float: left;
    color: white;
    background-color: black;
    height: 100px;
    width: 50%;
    padding-left: 5%;
    padding-right: 10%;
    padding-top: 2%;
    padding-bottom: 2%;
    border-right: 1px solid rgb(146, 146, 146);
    line-height: 150%;
}

.cta { /*Right part of the bottom*/
    float: left;
    color: white;
    background-color: black;
    height: 100px;
    padding: 2%;
    width: 50%;
}

@media only screen and (max-width:1000px) {
    .hero {
        font-size: 200%;
        margin-left: 30%;
        width: 50%;
    }

    .sub-heading {
        padding-right: 5%;
    }
}

@media only screen and (max-width:700px) {
    .hero {
        font-size: 180%;
        width: 60%;
    }

    .bottom {
        font-size: 70%;
    }
}

@media only screen and (max-width:650px) {
    .mobile {
        display: block;
    }

    .nav {
        display: none;
    }

    .sub-heading, .cta {
        width: 100%;
        padding: 4%;
    }

    .cta {
        margin-top: 7px;
        text-align: left;
    }
}

@media only screen and (max-width:500px) {
    .hero {
        width: 70%;
        margin: 5%;
    }

    .sub-heading, .cta { /*This styles both lesft and right part of the bottom but this time one on top of the other*/
        width: 100%;
        padding: 4%;
    }

    .cta {
        margin-top: 7px;
        text-align: left;
    }
}