* {
    font-family: Arial, Verdana, sans-serif;
    font-size: 1rem;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    max-width: 1600px;
    margin: auto;
}

@media (max-width: 768px) {
    header a {
        font-size: 0.8rem;
    }

    main nav li {
        flex: 1 1 auto;
    }

    header ul {
        display: flex;
        flex-flow: nowrap;
    }

    header li {
        flex: 1 1 0;
        margin: auto;
    }

    header li:last-child a {
        border: none;
    }

    header li a {
        padding: 5px 0;
    }

    main nav {
        flex: 1 1 100%;
        display: flex;
        flex-flow: nowrap;
        background-color: #7687b4;
        border-style: solid;
        border-width: 1px 0 1px 1px;
    }

    main nav ul {
        border-left: solid 1px;
        list-style-type: none;
        display: flex;
        overflow: hidden;
        flex-flow: nowrap;
        background-color: #7687b4;
        font-size: 0.9rem;
        font-weight: bold;
        flex: 6 1 0;
    }

    main li a {
        display: block;
        color: #000000;
        text-decoration: none;
        border-right: 1px solid;
        padding: 6px 5px;
        margin: auto;
    }

    main li a:hover {
        background-color: #9baef2;
    }

    main {
        margin: 5px;
    }

    article {
        flex: 1 1 100%;
        margin: 5px 0;
    }

    aside {
        flex: 1 1 100%;
    }

}

@media (min-width: 769px) and (max-width: 1024px) {

    header li a {
        padding: 5px 15px;
    }

    main nav {
        flex: 1 1 100%;
        display: flex;
        background-color: #7687b4;
        margin-bottom: 5px;
        border: solid 1px;
    }

    main nav ul {
        border-left: solid 1px;
        list-style-type: none;
        display: flex;
        overflow: hidden;
        flex-flow: nowrap;
        background-color: #7687b4;
        font-size: 0.9rem;
        font-weight: bold;
    }

    main nav li a {
        display: block;
        color: #000000;
        text-decoration: none;
        border-right: 1px solid;
        padding: 5px 15px;
        font-size: 1.2rem;
    }

    main nav li a:hover {
        background-color: #9baef2;
    }

    main {
        margin: 5px;
        font-size: 1rem;
    }

    article {
        flex: 4 1 0;
        margin: 0;
        min-width: 160px;
    }

    aside {
        flex: 1 1 0;
        margin-left: 5px;
    }
}

@media (min-width: 1025px) {

    main nav {
        flex: 1 1 0;
        background-color: #7687b4;
        border: solid 1px;
        margin:0 5px 0 0;
    }

    main nav ul {
        list-style-type: none;
        overflow: hidden;
        background-color: #7687b4;
        font-weight: bold;
    }

    main nav li a {
        display: block;
        color: black;
        text-decoration: none;
        border-top: solid 1px;
        font-size: 1.2rem;
        padding: 5px;
    }

    main nav li a:hover {
        background-color: #9baef2;
    }

    article {
        flex: 9 1 0;
        margin: 0;
    }

    aside {
        flex: 2 1 0;
        margin-left: 5px;
    }

    header li a {
        padding: 5px 15px;
    }

    main {
        margin: 5px;
    }

    .h1padding {
        padding: 5px;
    }

}

header {
    margin: 5px 5px 0 5px;
}

header ul {
    border: solid 1px;
    list-style-type: none;
    display: flex;
    overflow: hidden;
    flex-flow: nowrap;
    background-color: #7687B4;
    font-weight: bold;
    text-align: center;
}

header li a {
    display: block;
    color: #000000;
    text-decoration: none;
    border-right: 1px solid;
}

header li a:hover {
    background-color: #9baef2;
}

main {
    display: flex;
    flex-flow: wrap;
    text-align: center;
    align-items: flex-start;
}

article {
    border: solid 1px;
}

aside {
    border: solid 1px;
}

h1 {
    font-size: 1.1rem;
    background-color: #b5b5b5;
    padding: 5px 0;
    border-bottom: solid 1px;
}

footer {
    margin: 5px;
    display: flex;
    flex-flow: nowrap;
    justify-content: space-between;
}

footer ul {
    list-style-type: none;
    display: flex;
    flex-flow: wrap;
    overflow: hidden;
}

footer a {
    display: block;
    color: #000000;
    padding-right: 5px;
}

a:active, a:visited {
    text-decoration: none;
    color: black;
}

.borderandpadding {
    border: none;
    padding: 5px;
}

.active, a:visited .active {
    background-color: #57b491;
    color: #ffffff;
    border-color: #000000;
}