/**
Css des differentes sections
 */
body {
  background-color:#F4F4F4;
  height: 100vh;
}

aside {
  display: flex;
  align-items: stretch;
  height: 100vh;
}

/**
Css du header
 */
header {
    height: 8vh;
    background-color: #FFFFFF;
}

header > div {
    height: inherit;
    margin: auto;
    display: flex;
    justify-content: space-around;
}

section {
    border: 2px solid #DEDEDE;
    width: 50vw;
    margin-top: 5%;
    margin-left: auto;
    margin-right: auto;
    margin-bottom : 5%;
    background-color: #FFFFFF;
}

/**
Css des panneau d'ouverture
 */
#panneaugauche {
  background: radial-gradient(circle, gray, black);
  border: 2px solid  black;
  width: 50%;
}

#panneaudroit {
  background: radial-gradient(circle, gray, black);
  border: 2px solid  black;
  width: 50%;
}

/**
Css du bouton centrale
 */

.button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%); /* décalage de 50% de sa propre taille */
  display: inline-block;
  margin: 0 auto;
  z-index: 20;
  -webkit-border-radius: 10px;
  -webkit-box-shadow:
    0 3px rgba(128,128,128,1), /* gradient effects */
    0 4px rgba(118,118,118,1),
    0 5px rgba(108,108,108,1),
    0 6px rgba(98,98,98,1),
    0 7px rgba(88,88,88,1),
    0 8px rgba(78,78,78,1),
    0 14px 6px -1px rgba(128,128,128,1); /* shadow */
  -webkit-transition: -webkit-box-shadow .1s ease-in-out;
}

.button span {
    background: #E8E8E8 -webkit-gradient(
            linear,
            left bottom,
            left top,
            color-stop(50%, rgba(255, 255, 255, 0)),
            color-stop(50%, rgba(255, 255, 255, 0.3)),
            color-stop(100%, rgba(255, 255, 255, 0.2))),
        /* dark outside gradient */ -webkit-gradient(
            linear,
            left top,
            right top,
            color-stop(0%, rgba(210, 210, 210, 0.3)),
            color-stop(20%, rgba(210, 210, 210, 0)),
            color-stop(80%, rgba(210, 210, 210, 0)),
            color-stop(100%, rgba(210, 210, 210, 0.3))),
        /* light inner gradient */ -webkit-gradient(
            linear,
            left top,
            right top,
            color-stop(0%, rgba(255, 255, 255, 0)),
            color-stop(20%, rgba(255, 255, 255, 0.5)),
            color-stop(80%, rgba(255, 255, 255, 0.5)),
            color-stop(100%, rgba(255, 255, 255, 0))),
        /* diagonal line pattern */ -webkit-gradient(
            linear,
            0% 100%,
            100% 0%,
            color-stop(0%, rgba(255, 255, 255, 0)),
            color-stop(40%, rgba(255, 255, 255, 0)),
            color-stop(40%, #D2D2D1),
            color-stop(60%, #D2D2D1),
            color-stop(60%, rgba(255, 255, 255, 0)),
            color-stop(100%, rgba(255, 255, 255, 0)));
    -webkit-box-shadow:
    0 -1px #fff, /* top highlight */
    0 1px 1px #FFFFFF; /* bottom edge */
  -webkit-background-size: 100%, 100%, 100%, 4px 4px;
  -webkit-border-radius: 10px;
  -webkit-transition: -webkit-transform .1s ease-in-out;
  display: inline-block;
  padding: 10px 40px 10px 40px;
  color: #3A474D;
  text-transform: uppercase;
    font-family: 'TradeGothicLTStd-BdCn20', 'PT Sans Narrow', serif;
  font-weight: 700;
  font-size: 32px;
  text-shadow: 0 1px #fff, 0 -1px #262F33;
}

.button span:hover {
  color: #AEBF3B;
  text-shadow: 0 -1px #97A63A;
  cursor: pointer;
}

.button:active {
  -webkit-box-shadow:
    0 3px rgba(128,128,128,1),
    0 4px rgba(118,118,118,1),
    0 5px rgba(108,108,108,1),
    0 6px rgba(98,98,98,1),
    0 7px rgba(88,88,88,1),
    0 8px rgba(78,78,78,1),
    0 10px 2px 0 rgba(128,128,128,.6); /* shadow */
}

.button:active span{
  -webkit-transform: translate(0, 5px); /* depth of button press */
}

/**
Css des drapeaux
 */
.upperleft {
    background: url("../img/united-states-of-america-flag-wave-xl.png");
    background-size: 100% 100%;
    width: 20vw;
}

.uppermiddle {
    background: url("../img/united-kingdom-flag-wave-xl.png");
    background-size: 100% 100%;
    width: 20vw;
}

.upperright {
    background: url("../img/ireland-flag-wave-xl.png");
    background-size: 100% 100%;
    width: 20vw;
}

/**
Css de l'image centrale
 */
.imagecentrale{
    background: url("../img/imagecentrale.jpg");
    background-size: 100% 100%;
}

/**
Css des boutons de redirection
 */
.redirection{
    font-family: Arial,sans-serif;
  font-size: 1.6em;
  width: 200px;
  height: 43px;
    /*permet le centrage vertical*/
    padding: 7px 15px;
    text-align: center;
  color: #000;
  background: #444;
  background: linear-gradient( #555, #2C2C2C);
  border-radius: 8px;
  text-decoration:none;
  text-shadow: 0 1px 0 rgba( 255, 255, 255, 0.2);
  box-shadow: 0 0 5px rgba( 0, 0, 0, 0.5),
  0 -1px 0 rgba( 255, 255, 255, 0.4);
}

.redirection:hover{
  color: #222;
  background: #555;
  background: linear-gradient( #777, #333);
}

.redirection:active{
  color: #000;
  background: #444;
  background: linear-gradient( #555, #2C2C2C);
  box-shadow: 1px 1px 10px black inset,
  0 1px 0 rgba( 255, 255, 255, 0.4);
}