.nouveau_nouveau { color: red; font-size: 125%; }  /* utilisé dans /ff/formation/notes/system_partie_1.html */

html {
/*
  scroll-behavior: smooth;
*/
  scroll-behavior: auto;
}
body{
    margin: 0;
    padding: 0;
    color: lightgrey;
    background-color: black;
    font-size: 1.25em;
}

a { color: white;
    text-decoration: none;
}

a[name] {
        color: white;
}

/* sommaire */
hr{
    width: 70%;
    margin: 10px auto;
}
.header1 { border: 2px solid lightgreen; }
.header2 { border: 2px solid blue; }
.header3 { border: 2px solid orange; }
.header4 { border: 2px solid violet; }
header{
    margin: 10px auto;
    width: 75%;
    border-radius: 20px;
    padding-left: 10px;
}
h1{
    text-align: center;
}
header ul div{
    margin: 5px 0;
    color: white;
}
header > div {
    padding-bottom: 20px;
}
small {
    text-align: center;
    margin: 0px auto;
    padding: 4px;
    border-radius: 5px;
}
.somm_titre {
    font-weight: bold;
    font-size: 120%;
    text-align: center;
}
ul {
  float: left;
  width: 33%;
  list-style-type: none;
  margin: 0;
  margin-bottom: 2vw;
  padding: 0;
}
ul li {
    padding: 5px;
    text-align: center;
}
ul li:hover {
    background-color: #333;
}
#les_colonnes{
    overflow: auto;
}

/* grosses sections et articles */
.grosse_section{
    margin: 2%;
    margin-bottom: 80px;
}
.clearfix{
    clear: both;
}
article{
    margin: 1%;
    background-color: #222;
    border-radius: 20px;
    padding-top: 10px;
    position: relative; /* pour placer image en classe vignette */

    max-width: 1000px;
    margin: 20px auto;
}
article a h2{
    border-radius: 20px;
    padding: 10px;
    background-color: #444;
    text-decoration: none;
    display: inline;  /* évite le saut de ligne pour le lien "Suivant" */
}
article h3{
    margin-left: 1em;
}
p{
    padding-left: 2%;
    margin-bottom: 2em;
}
article_titre{
    font-weight: bold;
    font-size: 1.2em;
}
.renvoi1{
    text-decoration : underline;
}
.renvoi2{
    text-decoration : wavy underline;
}
.renvoi1:hover{
    color: lightgreen;
}
.renvoi2:hover{
    color: blue;
}
img.vignette{
    width: 100px;
    height: auto;
    position: absolute;
    right: 2px;
    top: 2px;
}
img.img_thumb{
    width: 100px;
}
/* source */
.marge_source{
    margin-left: 40px;
/*
    margin-bottom: 1rem;
*/
    margin-bottom: 2em;
}
.titre_source{
    text-decoration: underline;
}
/*
.code_source{
    font-family: Courier;
    border: 1px solid white;
    display: inline-block;
    padding: 5px 10px;
}
*/

.code_source{   /* sans le important, l'héritage de td centre le texte */
    font-family: Courier;
    border: 1px solid white;
    display: inline-block;
    padding: 5px 10px;
    text-align: left !important;
}

/* smartphone */
@media only screen and (max-width: 600px) {
    header{
        width: 98%;
    }
    ul {
      float: left;
      width: 100%;
    }
}