* {
    box-sizing: border-box;
}
body {
    font-family: Verdana, Arial;
    background-color: #40407A;
    color: #1976D2;
    margin: 0;
}
header {
    background-image: url('sunrise.jpg');
    background-size: 100% 100%;
    background-color: #40407A;
    color: #FFFFFF;
    margin-top: 50px;
    font-size: 90%;
    min-height: 200px;
}
header a {
    text-decoration: none;
}
header a:link, header a:visited {
    color: #FFFFFF;
}
header a:hover {
    color: #EDF5F5;
}
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 50px;
    z-index: 9999;
    background-color: white;
    margin: 0;
    padding-top: 0.5em;
    padding-bottom: 1em;
    padding-right: 1em;
    text-align: right;
    font-weight: bold;
}
nav ul {
    list-style: none;
    margin: 0;
    padding-right: 2em;
    font-size: 1.2em;
}
nav li {
    display: inline;
    padding-left: 4em;
}
nav a {
    text-decoration: none;
}
nav a:link {
    color: #3F2860;
}
nav a:visited {
    color: #497777;
}
nav a:hover {
    color: #A26100;
}
h2 {
    color: #1976D2;
    margin: 0;
}
li, dd {
    font-size: 90%;
}
dt {
    color: #002171;
}
footer {
    font-size: small;
    font-style: italic;
    text-align: center;
    clear: right;
}
table {
    border: 1px solid #40407A;
    margin-bottom: 1em;
    border-collapse: collapse;
}
td, th {
    border: 1px solid #40407A;
    padding: 0.5em;
}
tr:nth-of-type(even) {
    background-color: #D7E8E9;
}
caption {
    margin: 1em 0;
    font-weight: bold;
    font-size: 120%;
}
.yoga {
    color: #1976D2;
}
.home {
    height: 20vh;
    padding-top: 2em;
    padding-left: 10%;
}
.content {
    height: 20vh;
    padding-top: 2em;
    padding-left: 10%;
}
#wrapper {
    background-color: #F5F5F5;
    padding: 2em;
}
#mathero, #loungehero {
    height: 300px;
    background-size: 100% 100%;
    display: none;
}
#mathero {
    background-image: url('yogamat.jpg');
    background-repeat: no-repeat;
}
#loungehero {
    background-image: url('yogalounge.jpg');
}
section {
    padding-left: .5em;
    padding-right: .5em;
}
#flow {
    display: block;
}
@media screen and (min-width: 900px) {
    #wrapper {
        width: 70%;
        margin-left: auto;
        margin-right: auto;
    }

    nav ul {
        padding-right: 3em;
        font-size: 1.4em;
    }

    header {
        font-size: 110%;
        min-height: 250px;
    }

    .onethird {
        width: 30%;
        float: left;
        margin-right: 5%;
        margin-bottom: 2em;
    }

    .onethird:nth-of-type(3) {
        margin-right: 0;
    }

    .onehalf {
        width: 48%;
        float: left;
        margin-right: 4%;
    }

    .onehalf:last-of-type {
        margin-right: 0;
    }

    main::after {
        content: "";
        display: table;
        clear: both;
    }
}
@media screen and (min-width: 600px) {
    nav ul {
        display: flex;
        flex-direction: row;
        flex-wrap: nowrap;
        justify-content: flex-end;
    }

    section {
        padding-left: 2em;
        padding-right: 2em;
        flex: 1;
    }

    #mathero,
    #loungehero {
        display: block;
        margin-bottom: 1em;
    }

    #flow {
        display: flex;
        flex-direction: row;
        flex-wrap: wrap;
    }
}
@media screen and (min-width: 1024px) {
    header {
        font-size: 120%;
    }

    .home {
        height: 50vh;
        padding-top: 5em;
        padding-left: 8em;
    }

    .content {
        height: 30vh;
        padding-top: 2em;
        padding-left: 8em;
    }

    #wrapper {
        width: 80%;
        margin: auto;
    }
}