/** css de Venus_Paléo_Actuelles **/

body {
background: linear-gradient(#1c192e , #807ea6);
}
#princip {
max-width: 90%;
margin-left: auto;
margin-right: auto;
}
h1, h2, h3, h4, h5, h6 {
font-family: 'Trebuchet MS', sans-serif;
}
h1, h2 {
	font-size: 2vw; /** +1.7em; **/
	color:  #ffaa00 ; /** orange **/
	text-align:center;
}
h3, h4 {
	font-size: 1.5vw; /** ≈1.2em; **/
	color:  #ffaa00 ;
	text-align:center;
}
p{
font-family: Arial, Verdana, Sans-serif;
color:#fff; /** blc **/
}
a:link, a:visited{
text-decoration: none;
color : #eed359;
}
a:hover{
color:#3e3e3e;
background-color:#eed359;
border-radius: 4px;
}
.txtclair{
color:  #d2d2d2; /** gris pale **/
text-align:center;
}
.center {
text-align:center;
}
.txt-gauche{
color:  #d2d2d2;
text-align: left;
}
.txt-droite{
color:  #d2d2d2;
text-align: right;
}
.intro {
margin-top:10px;
padding : 10px 80px 10px 80px;
background: linear-gradient(#1d213e , #3d3a53);
border-radius: 15px;
}

/** btn up **/
#scrollUp {
position: fixed;
bottom : 10px;
right: -100px;
opacity: 0.5;
}
/** **/

/** période **/
.neo {
background: linear-gradient(#28253c , #2d2a42);
margin-top:10px;
padding:15px;
border-radius: 30px;
}
.magda {
background: linear-gradient(#36344e , #43405c);
margin-top:10px;
padding:15px;
border-radius: 30px;
}
.grave {
background: linear-gradient(#45425f , #565474);
margin-top:10px;
padding:15px;
border-radius: 30px;
}
.auri {
background: linear-gradient(#585677 , #6a678b);
margin-top:10px;
padding:15px;
border-radius: 30px;
}
.acheu {
background: linear-gradient(#6c6a8e , #737197);
margin-top:10px;
padding:15px;
border-radius: 30px;
}
/** fin période **/

/** lightbox **/
* {
  box-sizing: border-box;
  border-radius: 10px;
}
.row > .column {
  padding: 0 8px;
}
.row:after {
  content: "";
  display: table;
  clear: both;
}
.column {
  float: left;
  width: 50%;
}

/* The Modal (background) */
.modal {
  display: none;
  position: fixed;
  z-index: 1;
  padding-top: 100px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background: rgba(0, 0, 0, 0.7);
}

/* Modal Content */
.modal-content {
  position: relative;
  background-color: #fefefe;
  margin: auto;
  padding: 0;
  width: 90%;
  max-width: 720px;
}

/* The Close Button */
.close {
  color: white;
  position: absolute;
  top: 10px; 
  right: 25px;
  font-size: 45px;
  font-weight: bold;
}

.close:hover,
.close:focus {
  color: #999;
  text-decoration: none;
  cursor: pointer;
}

.mySlides {
  display: none;
}

.cursor {
  cursor: pointer;
}

/* Next & previous buttons */
.prev,
.next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  padding: 16px;
  margin-top: -50px;
  color: white;
  font-weight: bold;
  font-size: 20px;
  transition: 0.6s ease;
  border-radius: 0 3px 3px 0;
  user-select: none;
  -webkit-user-select: none;
}

/* Position the "next button" to the right */
.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

/* On hover, add a black background color with a little bit see-through */
.prev:hover,
.next:hover {
  background-color: rgba(0, 0, 0, 0.4);
}

/* Number text (1/3 etc) */
.numbertext {
  font-family: Arial, cursive;
  color: #000;
  font-size: 1.5vw;
  padding: 5px 5px;
  position: absolute;
  top: 0;
}
.space {
  padding: 0 10px;
  color:#3d3a53;
}
.demo {
  opacity: 0.6;
}
.active,
.demo:hover {
  opacity: 1;
}
img.hover-shadow {
  transition: 0.3s;
}
.hover-shadow:hover {
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.6), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}
/** fin lightbox **/

footer {
margin-top:10px;
padding : 10px 80px 10px 80px;
background-color :#1c192e;
border-radius: 15px;
}

/*--------------------*/
/* RESPONSIVE STYLE */
/*--------------------*/
@media only screen and (max-width: 1200px) {
h1, h2 { font-size: 1.7em;}
h3, h4 {font-size: 1.2em;}
p{font-size: .9em;}


}
@media only screen and (max-width: 600px) {
#princip { max-width: 98%;}
.intro { margin-top:5px;
padding : 5px 10px 5px 10px;}
.numbertext {font-size: .7em;}
footer {padding : 5px 10px 5px 10px;}
}