* {
  box-sizing: border-box;
}

header {
    text-align: center;
    color: orange;
}

h1 {
    font-variant: small-caps;
}

nav {
    background-color: orange;
}

body {
    background-color: orangered;
}

a {
    color: orangered;
}

nav ul {
  list-style: none;
  margin: 0.0;
  padding: 0;
  display: flex;
  justify-content: space-around;
}

nav ul li {
    color: black;
    padding: 0.5em;
    margin: 0;
    width: 25%;
    text-align: center;
}

nav ul li:hover {
    background-color: chocolate;
}

main {
    display: flex;
    flex-flow: row wrap;
    flex-basis: 90%;
    justify-content: space-around;
    margin: 1em 0;
}

div.pic-column {
    flex: 1;
    display: flex;
    flex-flow: column nowrap;
    align-items: center;
    background-color: coral;
    padding: 0;
    margin: 0.5em;
}

div.pic-column div.imgbox {
    width: 90%;
    margin: 1em;
    padding: 1em;
    background-color: orange;
    font-size: 0.75em;
}

#container {
    display: flex;
    flex-flow: column nowrap;
    margin: 1em auto;
    padding: 0;
    width: 90%; 
    border: 10px solid orange;
    box-shadow: 10px 10px 5px 5px #00000050;
}

img {
    width: 100%;
}

p {
    padding: 0 1em;
}

footer {
    text-align: center;
    background-color: orange;
    margin: 0;
    padding: 0;
}

@media screen and (max-width: 600px) {
    div.pic-column {
        flex: 100%;
    }

    nav ul {
        flex-flow: column;
    }

    nav ul li {
        width: 100%;
    }
}