Raw
styles.css

* {
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
}

body {
    background-color: #fffffe;
    margin: 20px 0 0 0;
    color: #fffffb;
}

header {
    background: url(image/IMG-4495.jpg) 100% fixed;
    height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    line-height: 1px;
    font-weight: 800;
    font-family: sans-serif;
    color: white;

}

h1.titre {
    font-size: 100px;
    margin-top: 140px;
    text-transform: uppercase;
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
color:#EF8F1D;
}

h3.slogan {
    font-size: 35px;
    font-style: arial ;
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
    color: #ffffff;
}

/* Destinations */

section#destinations {
    margin: 0px 20% 0 20%;
}

section#destinations h3 {
    padding-top: 50px;
    opacity: 0.5;
    color: #fff8f8;
}

div.destination-item {
    color: #ffffff;
    height: 300px;
    margin: 15px;
    position: relative;
    flex: 1 0 29%;
    background-repeat: no-repeat;
    background-size: 100%;
}

div.destination-item:hover {
    transform: scale(0.98);
    box-shadow: 0 8px 16px 0 rgba(0, 0, 0, 0.4), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
    transition: 0.2s all;
}

div.destinations-group {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.barcelone { background: url(image/IMG-4499.jpg); }
.dubai { background: url(image/IMG-4501.JPG); }
.londres { background: url(image/ponton-des-caraïbes-de-la-martinique-sur-baie-marin-105968197.jpg); }
.paris { background: url(image/IMG-4498.JPG); }
.philippines { background: url(image/IMG-4503.JPG); }
.tunis { background: url(image/IMG-4502.JPG); }

.overlay { 
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    top: 0;
}

span.nom {
    position: relative;
    color: #373737;
    background-color: #DBDBD9;
    top: 20px;
    float: right;
    padding: 12px;
    font-size: 22px;
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
}

span.prix {
    position: relative;
    color: #fff;
    background-color: #EF8F1D;
    padding: 12px;
    font-size: 25px;
    top: 220px;
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
}

/* Formulaire de recherche */

header form {
    background-color: #EF8F1D;
    padding: 20px;
}

.search-form {
    transform: translateY(75px);
}

.form-group {
    color: #fffefe;
    display: flex;
    justify-content: center;
    flex-direction: row;
    margin: 10px;
}

.form-group input, select, option{
    border: none;
    padding: 5px;
    background-color: bisque;
}

.form-group label {
    margin: 5px;
    padding: 10px;
}

.button-submit{
    text-align: center;
    font-family: sans-serif;
    
}

.button-submit input {
    background-color: #d8def9;
    border: none;
    color: #f97b06;
    font-size: 25px;
    margin-top: 10px;
    font-family: sans-serif;
}

/* Pied de page */

footer p {
    text-align: center;
    color: #373737;
    padding: 10px;
}