body *{
    font-family: 'Open Sans', sans-serif;
    box-sizing: border-box;
}

body {
    margin: 0;

    height: 100%;
    min-height: 100vh;

    display: flex;
    flex-direction: column;

    color: #333;
}

.flex-container {
    display: flex;
}

header {
    width: 100%;
    height: 60px;
    position: fixed;
    justify-content: space-between;

    background-color: #eee;
    border-bottom: 1px solid #ddd;
    box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}

header ul {
    list-style-type: none;
    padding-left: 0;
    height: 60px;
    margin: 0;
    align-items: center;
    margin-right: 20px;
}
header li {
    padding: 0;
}

header nav a {
    margin-left: 10px;
}

a {
    color: #5269F6;
    text-decoration: none;
}
a:hover {
    color: #0b27da;
}

.main {
    flex-grow: 1;
    padding-top: 60px;
    background-color: #fff;
}

section {
    flex-grow: 11;
    flex-direction: column;
    justify-content: space-between;
}

aside {
    flex-grow: 1;
    min-width: 200px;

    background-color: lightyellow;
    border-right: 1px solid #ddd;

    background-color: #333;
    border-right: none;

    background-color: #fff;
    border-right: 1px solid #ddd;


    text-align: center;
}

aside h1 {
    font-size: large;
    font-weight: normal;
    color: #777;
    padding: 10px 0;
}
aside {
    list-style-type: none;
}

aside a {
    display: block;
    padding: 10px 0;
    border-top: 1px solid #eee;
}
aside a:hover {
    border-top: 1px solid #ddd;
}

article {
    padding: 0 1em 1em 1em;
}

article h1 {
    margin-top: 0;
    font-size: xx-large;
}

.title {
    margin: 0 -1em 1em -1em;
    padding: 1em;
    background-color: #555;
    background-color: royalblue;
    color: whitesmoke;
}
.title h1 {
    color: #FF8C26;
    color: whitesmoke;
    font-weight: normal;
}


footer {
    min-height: 100px;
    margin-top: 50px;
    padding: 1em;
    text-align: center;
    background-color: #eee;
}

pre code {
    font-family: monospace;
}
.super {
    margin: 16px -16px;
    padding: 16px;
    background-color: #eee;
}

/* other styles */

.border { border: 3px solid darkslateblue; }
.border .border { border: 3px solid darkorange; }

/* shortcuts */
.flex { display: flex; }

/* flex-direction */
.row-reverse    { flex-direction: row-reverse;    }
.column         { flex-direction: column;         }
.column-reverse { flex-direction: column-reverse; }

/* justify-content */
.justify-start   { justify-content: flex-start;    }
.justify-end     { justify-content: flex-end;      }
.justify-center  { justify-content: center;        }
.justify-between { justify-content: space-between; }
.justify-around  { justify-content: space-around;  }

/* align-items */
.align-start    { align-items: flex-start; }
.align-end      { align-items: flex-end;   }
.align-center   { align-items: center;     }
.align-baseline { align-items: baseline;   }
.align-stretch  { align-items: stretch;    }

/* align-self */
.self-center { align-self: center; }

/* order */
.order-3 { order: 3 }

/* wrap */
.nowrap       { flex-wrap : nowrap       }
.wrap         { flex-wrap : wrap         }
.wrap-reverse { flex-wrap : wrap-reverse }