:root {
  --width : 1000px;
  --widthscroll : 900px;
}
/* GENERAL */
*
{
    margin : 0;
    padding: 0;
}
@font-face {
    font-family: 'Open Sans';
    src: url('OpenSans-Regular.ttf');
    
}
body
{
    font-family: "Open Sans", Arial, sans-serif;
    font-size: 15px;
    background: url('images/bibli.jpg');
    background-repeat: no-repeat;
    background-size: cover;
    /*opacity: 0.75;*/
}
h1
{
    font-family: cursive;
    font-size: 45px;
    color:444;
}
ul
{
    list-style: none;
}
a
{
    text-decoration: none;
    color: 444;
}
.wrapper
{
    width: 940px;
    margin: 0 auto;
    padding: 0 10px;
}
.clear
{
    clear:both;
}
small
{
    font-size: 13px;
    font-style: italic;
}

.image-redimensionnee {
            width: --widthscroll : 900px;
            height: auto; /* Maintient le ratio de l'image */
        }
/* HEADER */

header{
    height: 120px;
    background-image: url('images/parchemin.jpg');
    background-repeat: no-repeat; /* Répéter l'image horizontalement et verticalement */
    background-size: cover; /* Ajuster l'image à la taille de l'écran */
    background-attachment: fixed; /* Fixer l'image en arrière-plan */
    background-position: center; /* Centrer l'image horizontalement et verticalement */
/*	width: 1200;  Largeur de l'image */
    width: var(--width); /* Largeur de l'image */
    margin: 0 auto;
}

h1,h2,h3,h4
{
    color : #444;
}
h1
{
    float: left;
    margin-top: 32px;
}
h2
{
    font-size: 55px;
}
h3
{
    font-size: 30px;
}
h4
{
    font-size: 24px;
    color: #000;
}
header nav
{
    float: right;
    margin-top: 65px;
}
header nav ul li
{
    display: inline-block;
}
header nav ul li a
{
    float: left;
    text-transform: uppercase;
    font-weight: bold;
    margin-right: 20px;
} 
header nav ul li div
{
    float: left;
    text-transform: uppercase;
    font-weight: bold;
    margin-right: 20px;
} 
/* MAIN IMAGE */
#main-image
{
    height: 400px;
    background: url('images/bibli.jpg');
    opacity: 0.75;
}

/* FRAMEWORK */
#framework
{
    padding-top: 20px;
}
#framework ul li
{
    width: 300px;
    height: 10px;
    float: left;
    padding-top: 140px;
}
#f1
{
    background: url('images/python.png') no-repeat center center;
    background-size: 100px;
}
#f2
{
    background: url('images/matplotlib.png') no-repeat center center;
    background-size: 150px;
}
#f3
{
    background: url('images/seaborn.jpg') no-repeat  center center;
    background-size: 80px;
}
#f4
{
    background: url('images/scikit_learn.png') no-repeat  center center;
    background-size: 100px;
}
#f5
{
    background: url('images/keras.png') no-repeat  center center;
    background-size: 130px;
}
#f6
{
    background: url('images/tensorflow.png') no-repeat  center center;
    background-size: 110px;
}
/* DESCRIPTION */
#description
{
    padding: 10px 0;
    background-image: url('images/parchemin.jpg');
    background-repeat: no-repeat; /* Répéter l'image horizontalement et verticalement */
    background-size: cover; /* Ajuster l'image à la taille de l'écran */
    background-attachment: fixed; /* Fixer l'image en arrière-plan */
    background-position: center; /* Centrer l'image horizontalement et verticalement */
    /* width: 1200px; Largeur de l'image */
	width: var(--width); /* Largeur de l'image */
    margin: 0 auto;
}
#description article
{
    width: 300px;
    height: 470px;
    float: left;
    border-radius: 10px;
}
.overlay
{
    background: rgba(255,255,255,0.80);
    height: 100%;
    width: 120px;
    padding: 20px;
    border-radius: 10px 0 0 10px;
    text-align: center;
}
article h4
{
    border-bottom: 1px solid #ddd;
    font-size: 20px;
    padding-bottom: 10px;
    text-transform: uppercase;
    margin-bottom: 10px;
    text-align: center;
}
#description p
{
    text-align: center;
    margin-bottom: 20px;
}
.button-2
{
    color: #fff;
    background-color: #ff7a00;
    padding: 6px 20px;
    border-radius: 3px;
}
.button-2:hover
{
    color: #fff;
    background-color: #02b8dd;
    padding: 6px 20px;
    border-radius: 3px;
}
/* CONTACT */
#contact
{
    padding: 20px 0;
    background-image: url('images/parchemin.jpg');
    background-repeat: no-repeat; /* Répéter l'image horizontalement et verticalement */
    background-size: cover; /* Ajuster l'image à la taille de l'écran */
    background-attachment: fixed; /* Fixer l'image en arrière-plan */
    background-position: center; /* Centrer l'image horizontalement et verticalement */
    width: var(--width); /* Largeur de l'image */
    margin: 0 auto;
    text-align: center;
}

#contact h3
{
   width: 400px; 
   text-transform: uppercase;
   margin: 0 auto 20px auto;
   border-bottom: 1px solid #1e20ac;
}
form
{
    margin: 60px 0 20px 0;
}
label
{
    font-weight: bold;
    font-size: 20px;
    margin-right: 10px;
    color: #777;
}
input[type="text"]
{
    padding: 10px;
    font-size: 20px;
    margin-right: 20px;
    border: 2px solid #8b7575;
    border-radius: 3px;
}
.button-3
{
    color: #fff  ;
    font-size: 20px;
    font-weight: bold;
    padding: 11px;
    background-color: #02b8dd;
    border-style: none;
    border-radius: 3px;
}
.button-3:hover
{
    color: #fff; 
    background-color: #444;
}

/* FOOTER */
footer
{
    height: 65px;
    width: 1var(--width);
    background-color: rgba(68, 68, 68, 0.9);
    margin: 0 auto; /* cette ligne centre le footer */
}
.github
{
    text-align: center;
    font-weight: bold;
    padding-top: 30px;
    color: #777;
}

.plan {
    position: relative;
    padding: 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    font-size: 14px;
    border-radius: 5px;
    z-index: 10;
}