*, ::before, ::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background: #333;
    font-family: Arial, Helvetica, sans-serif;
    height: 100vh;
    background: url('vallée.jpg');
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
    overflow-x: hidden;
}


.container-first {
    position: absolute;
    top: 30%;
    left: 5%;
}

h1 {
    text-transform: uppercase;
    font-size: 110px;
    color: #f1f1f1;
    font-family: Abril fatface, sans-serif;
}
h1 span {
    position: relative;
}
.container-btns {
    position: relative;
    top: 50px;
}
.btn-first {
    border: 2px solid #f1f1f1;
    outline: none;
    background: transparent;
    font-size: 30px;
    padding: 20px;
    width: 300px;
    color: #f1f1f1;
    cursor: pointer;
}
.btn-first:nth-child(1){
    margin-right: 30px;
}
.btn-first:hover {
    transition: all 0.3s ease-in-out;
    background: #f1f1f1;
    color: #333;
}
.lignes {
    position: absolute;
    top: 6%;
    left: 5%;
}
.l1 {
    width: 250px;
    height: 3px;
    background: #f1f1f1;
    border-radius: 5px;
}
.l2 {
    width: 140px;
    height: 3px;
    background: #f1f1f1;
    border-radius: 5px;
    position: relative;
    top: 20px;
}

.logo {
    position: absolute;
    right: 2.9%;
    top: 4%;
    width: 80px;
    height: 80px;
    cursor: pointer;
}
.medias {
    list-style-type: none;
    position: absolute;
    right: 3.3%;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
.bulle {
    width: 60px;
    height: 60px;
    border-radius: 70%;
    border: 1px solid #f1f1f100;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 10px 0;
    background: #f1f1f100;
    cursor: pointer;
    position: relative;
}

.logo-medias {
    width: 40px;
    height: 40px;
}
button {
    padding: 20px 50px;
    font-size: 1.5rem;
    cursor: pointer;
    border: 0;
    color: #fff;
    background: transparent;
    position: relative;
    margin: 20px;
    transition: all .25s;
  }
  button::after,button::before {
    border: 3px solid #fff;
    content: '';
    position: absolute;
    border-radius: inherit;
    width: 100%;
    height: 100%;
    left: 0px;
    bottom: 0px;
    transition: all .25s;
  }
  button:hover::after {
    transform: translate(-5px, -5px);
  }
  
  button:hover::before {
    transform: translate(5px, 5px);
  }
  body {
	color: #333;
	font: 100% Lato, Arial, Sans Serif;
	height: 100vh;
	margin: 0;
	padding: 0;
	overflow-x: hidden;
}

#background-wrap {
    bottom: 0;
	left: 0;
	position: fixed;
	right: 0;
	top: 0;
	z-index: -1;
}

/* KEYFRAMES */

@-webkit-keyframes animateBubble {
    0% {
        margin-top: 1000px;
    }
    100% {
        margin-top: -100%;
    }
}

@-moz-keyframes animateBubble {
    0% {
        margin-top: 1000px;
    }
    100% {
        margin-top: -100%;
    }
}

@keyframes animateBubble {
    0% {
        margin-top: 1000px;
    }
    100% {
        margin-top: -100%;
    }
}

@-webkit-keyframes sideWays { 
    0% { 
        margin-left:0px;
    }
    100% { 
        margin-left:50px;
    }
}

@-moz-keyframes sideWays { 
    0% { 
        margin-left:0px;
    }
    100% { 
        margin-left:50px;
    }
}

@keyframes sideWays { 
    0% { 
        margin-left:0px;
    }
    100% { 
        margin-left:50px;
    }
}
.transition{
    position: fixed;
    width:100%;
    height:100%;
    background: #222222;
    z-index: 1;
    opacity: 0;
    pointer-events: none;
    transition : ease-in 0.4s;
}
.transition.active{
    opacity: 1;
    pointer-events: none;
}

.audio-container2 {
    position: absolute;
    bottom: 0;
    left: 0;
    margin: 20px;
}

.container22 {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 70%;
}

.card-white{
    background-color:  #00000085;
    padding: 30px;
    margin: 0 auto;
    margin-top: 30px;
    box-shadow: 1px 1px 7px rgba(0, 0, 0, 0.07);
    border-radius: 4px;
    width: 70vw;
    color: white;
  
  }
  
  #introduction {
     text-align: center;  
  }

  :root{
    --background-dark: #2d3548;
    --text-light: rgba(255,255,255,0.6);
    --text-lighter: rgba(255,255,255,0.9);
    --spacing-s: 8px;
    --spacing-m: 16px;
    --spacing-l: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 64px;
    --width-container: 1200px;
  }
  
  .hero-section{
    align-items: flex-start;
    display: flex;
    justify-content: center;
    padding: var(--spacing-xxl) var(--spacing-l);
  }
  
  .card-grid{
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    grid-column-gap: var(--spacing-l);
    grid-row-gap: var(--spacing-l);
    max-width: var(--width-container);
    width: 40%;
  }
  
  @media(min-width: 540px){
    .card-grid{
      grid-template-columns: repeat(2, 1fr); 
    }
  }
  
  @media(min-width: 960px){
    .card-grid{
      grid-template-columns: repeat(4, 1fr); 
    }
  }
  
  .card{
    list-style: none;
    position: relative;
  }
  
  .card:before{
    content: '';
    display: block;
    padding-bottom: 150%;
    width: 100%;
  }
  
  .card__background{
    background-size: cover;
    background-position: center;
    border-radius: var(--spacing-l);
    bottom: 0;
    filter: brightness(0.75) saturate(1.2) contrast(0.85);
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transform-origin: center;
    transform: scale(1) translateZ(0);
    transition: 
      filter 200ms linear,
      transform 200ms linear;
  }
  
  .card:hover .card__background{
    transform: scale(1.05) translateZ(0);
  }
  
  .card-grid:hover > .card:not(:hover) .card__background{
    filter: brightness(0.5) saturate(0) contrast(1.2) blur(20px);
  }
  
  .card__content{
    left: 0;
    padding: var(--spacing-l);
    position: absolute;
    top: 0;
  }
  
  .card__category{
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-s);
    text-transform: uppercase;
  }
  
  .card__heading{
    color: var(--text-lighter);
    font-size: 1.9rem;
    text-shadow: 2px 2px 20px rgba(0,0,0,0.2);
    line-height: 1.4;
    word-spacing: 100vw;
  }