:root {
    font-family: Helvetica, "Open Sans", Arial, sans-serif;
    --color-light:         #f9f9f9;
    --color-dark:          #333;
    --color-neutral:       #ddd;
    --color-neutralDarker: #aaa;

    --color-accent:         #428bca;
    --color-accentFocus: 	#5bc0de;
    --color-alert:    #d9534f;
    --color-positive:  #5cb85c;

    display:    flex;
    flex-flow:  column;
    min-height: 100%;
    min-width:  100%;
}

html {
    box-sizing: border-box;
}

*, *:before, *:after {
    box-sizing: inherit;
}

body {
    flex: 1;

    padding: 1rem;
    background-color: var(--color-light);
    color: var(--color-dark);
    min-height: 100%;
    min-width: 100%;
}

header, footer {
    background-color: var(--color-dark);
    color: var(--color-light);
    margin: -1rem;
    padding: 1rem;

    display: flex;
    flex-flow: row;
}

main {
    margin: -1rem;
    padding: 1rem;
}

nav {
    display: flex;
    flex-flow: row;
}

nav > * {
    margin-right: 2rem;
}

footer > *:last-child {
    margin-left: auto; /* makes the last (an the first if the only) element in footer floating to the right */
}

a {
    color: inherit;
    text-decoration-style: dotted;
}

nav a {
    text-decoration: none;
}

a:hover {
    text-decoration: underline solid;
}

p {
    text-align: justify;
}

pre, code {
    font-family: "Overpass Mono", Courier, monospace;
    font-size: 0.9em;
}

h4 {
    font-size: 1.1rem;
}

h5 {
    font-size: 1rem;
}

h6 {
    font-size: 0.9rem;
}

/* === Form controls === */
button, input {
    line-height: 2rem;
    font-size: 1.2rem;
    min-width: 10rem;
    border-radius: 0.25rem;
    margin: 0.5rem;
}

button, input[type=submit], input[type=reset], input[type=button] {
    cursor: pointer;
}

input[type=submit], button {
    color: var(--color-light);
    background-color: var(--color-accent);
    border-color: calc(var(--color-accent) * 0.9);
}

button[type=button], button[type=reset], input[type=reset], input[type=button] {
    color: var(--color-dark);
    background-color: var(--color-neutral);
    border-color: calc(var(--color-neutral) * 0.9);
}

button:hover, input:hover, input[type=submit]:hover, input[type=reset]:hover, input[type=button]:hover {
    outline: none;
    border-color: var(--color-accentFocus);
    box-shadow: 0 0 1rem #66d;
}

input[type=radio], input[type=checkbox] {
    min-width: 0.1em;
}

/* === Table ==- */

table {
    border-collapse: collapse;
    margin-top: 0.5rem;
    margin-bottom: 0.5rem;
}

th, td {
    border: 1px solid var(--color-neutralDarker);
    padding: 0.3em 0.5em;
}

th, tfoot td {
    padding-top: 0.6em;
    padding-bottom: 0.6em;
}

th, tfoot td {
    background-color: var(--color-dark);
    color: var(--color-light);
}

tr:nth-child(odd) {
    background-color: var(--color-light);
}

tr:nth-child(even) {
    background-color: var(--color-neutral);
}

tr:hover {
    background-color: var(--color-accentFocus);
}


/* === Grouping === */

fieldset {
    margin: 0.5rem;
}