:root {
    --themeColor1: rgb(0, 0, 0);
    --themeColor2: rgb(213, 47, 75);
    --headerBorder: min(0.25vw, 0.25vh);
    --smallStroke: 0.75px;
    --negativeSmall: -0.75px;
    --size: 0.35em;
}
body, html {
    padding: 0;
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    font-size: min(2.5vw, 2.5vh);
}
a, p, h1, h2, h3, h4, h5, ul, li {
    all: unset;
}
body {
    min-height: 100vh;
}

/* TITLE HEADER */
header {
    display: flex;
    position: relative;
    flex-direction: column-reverse;
    border-bottom: var(--headerBorder) solid var(--themeColor1);
    align-items: center;
    position: relative;
}
header::before {
    content: "";
    position: absolute;
    background-image: url(_images/marbled-meat.jfif);
    width: 100%;
    height: 100%;
    top: 0; left: 0;
    opacity: 1;
    z-index: 0;
}
header h1 {
    line-height: calc(var(--headerBorder)/2);
    font-variant: small-caps;
    font-weight: bold;
    font-size: 3em;
    color: var(--themeColor2);
    z-index: 10;
    text-shadow:
        -1px -1px 0 var(--themeColor1),  
        1px -1px 0 var(--themeColor1),
        -1px 1px 0 var(--themeColor1),
        1px 1px 0 var(--themeColor1);
}
header h2 {
    font-size: 2em;
    padding: 0.4em 0 0.6em;
    font-variant: small-caps;
    font-weight: bold;
    color: white;
    letter-spacing: 0.15em;
    z-index: 15;
    opacity: 0.5;
    text-shadow:
        -1px -1px 0 var(--themeColor2),  
        1px -1px 0 var(--themeColor2),
        -1px 1px 0 var(--themeColor2),
        1px 1px 0 var(--themeColor2);
}

/* SELECTOR */
header nav {
    position: absolute;
    top: 0; bottom: 0;
    right: 2.5em;
    margin: auto;
    display: none;
}
@media only screen and (min-width: 1250px) {
    header nav {
        display: flex;
        align-content: center;
        align-items: center;
    }
}
form {
    position: relative;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 1.05em;
    width: max-content;
    border: 0.1em solid black;
}
form::before, form::after {
  position: absolute;
  z-index: 10;
  content: "";
  right: 0.75em;
  pointer-events: none;
  border-left: var(--size) solid transparent;
  border-right: var(--size) solid transparent;
}
form::before {
  border-bottom: var(--size) solid black;
  top: 20%;
}
form::after {
  border-top: var(--size) solid black;
  top: 55%;
}
select {
    appearance: none;
    position: relative;
    width: 100%;
    font-size: 1em;
    padding: 0.25em;
    padding-right: 2.4em;
    padding-left: 0.5em;
}

/* MAIN ARTICLE */
main {
    width: 87.5vw;
    max-width: 100vh;
    margin: 4.5em auto 2em;
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 1.25em;
}
@media only screen and (min-width: 850px) {
    main {
        font-size: 1.0em;
    }
    article p {
        text-align: justify;
    }
}
h3, h4 {
    display: block;
    margin-bottom: 0.75em;
    font-weight: bold;
    
}
h3 {
    font-size: 1.35em;
    margin-top: 1.5em;
}
h4 {
    margin-top: 2em;
    font-size: 1.1em;
    color:#3a3a3a;
}
p {
    display: block;
    margin-bottom: 1em;
    line-height: 1.25em;
}
main a  {
    color: var(--themeColor2);
}
main a:hover {
    cursor: pointer;
    text-decoration: underline;
}
main a:active {
    color: red;
}
main article img, main article video {
    margin: 0.5em auto 0.5em;
    width: 80%;
}
main span {
    display: block;
    color: grey;
    font-size: 0.6em;
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.4em;
    margin-bottom: 3em;
}
article table {
    width: 95%;
    margin: auto;   
}
article th {
    font-weight:100;
    text-decoration: underline;
    text-align: right;
    vertical-align: text-top;
}
article td {
    text-align: left;
    vertical-align: text-top;
    padding-left: 0.5em;
    padding-bottom: 0.5em;
}
@media only screen and (min-width: 850px) {
    main article table {
        width: 90%;
    }
}
article .small {
    width: 60%;
    margin: auto;
}
article .medium {
    width: 75%;
    margin: auto;
}
article li {
    display: list-item;
    text-align: left;
    margin-bottom: 0.5em;
}
@media only screen and (min-width: 850px) {
    article li {
        margin-left: 1.5em;
        margin-right: 3em;
        text-align: justify;
    }
}


/* Navigation */
nav {
    display: flex;
    flex-flow: column-reverse;
    justify-content: center;
    align-items: center;
    margin: 2em 0.75em 2.5em;
}
nav ul {
    display: flex;
    flex-flow: column;
    margin: 0.5em 0;
}
nav.centered ul {
    margin: 0 !important; 
}
ul.nav-to-parent {
    align-items: flex-end;
    margin-right: 7.5%;
}
ul.nav-to-children {
    align-items: flex-start;
    margin-left: 7.5%;
}

nav li {
    margin: 0.3em;
    filter: brightness(120%);
}
nav li:hover {
    filter: brightness(100%);
    cursor: pointer;
}
nav li img {
    height: 0.6em;
    margin: 0 0.3em;
}
ul.nav-to-parent img {
    transform: rotate(180deg);
} 
nav li a {
    font-size: 1.2em;
    font-weight: bold;
    text-decoration: none;
    color: var(--themeColor2);
    font-variant: small-caps;
    text-shadow:
        var(--negativeSmall) var(--negativeSmall) 0 var(--themeColor1),  
        var(--smallStroke) var(--negativeSmall) 0 var(--themeColor1),
        var(--negativeSmall) var(--smallStroke) 0 var(--themeColor1),
        var(--smallStroke) var(--smallStroke) 0 var(--themeColor1);

}
#github-header {
    font-size: 0.9em;
}

/* FOOTER */
footer {
    margin: 2em auto 1em;
    font-family: Arial, Helvetica, sans-serif;
}
footer p {
    font-size: 0.75em;
    text-align: center;
    font-family: Georgia sans-serif;
    text-align: center;
    display: block;
    margin-top: 1em;
}
#returnbutton {
    display: flex;
    margin: auto;
    align-items: center;
    opacity: 0.8;
    font-size: 0.8em;
    border: outset lightgrey 0.1em;
    border-radius: 0.05em;
    padding: 0.2em;
}
#returnbutton p {
    font-size: 1.20em;
    opacity: 0.8;
    text-align: left;
    margin: 0 0.2em;
    font-family: Arial, Helvetica, sans-serif;
    font-weight: bold;
    font-variant: small-caps;
}
#return {
    background-image: url("_images/returngrey.svg");
    width: 5em;
    height: 2.5em;
    background-repeat:no-repeat;
    background-size:contain;
    display: block;
}
#returnbutton:hover {
    color: #7D1E2D;
    border-color: #7D1E2D20;
    cursor: pointer;
}
#returnbutton:hover #return {
    background-image: url("_images/return.svg");
}