body {
    font-family: Helvetica, Arial, sans-serif;
    background-color: #336699;
    color: white; 
    line-height: 1.6;
    margin: 0;
}


.header {
    border: none;
    text-align: center;
    padding: 20px 1px;
    background-image: linear-gradient(rgba(51, 119, 153, 0.8), rgba(51, 119, 153, 0.9)), url("../images/banner.gif");
    background-position: bottom;
    background-size: cover; 
    background-repeat: no-repeat;
    position: relative;
    z-index: 10; 
}


.header h1 {
    font-family: Impact, sans-serif;
    font-size: 60px;
    color: #99CCFF;
    text-align: center;
    text-shadow: 2px 2px #336699;
    margin: 0;
}

h2 {
    font-size: 24px; 
    color: #FFFFFF;
    border-bottom: 2px solid #99CCFF; 
    padding-bottom: 5px;
}

h3 {
    font-size: 18px;
    color: #cccccc;
}

p {
    font-size: 16px;
    text-align: left;
}


ul {
    list-style-type: none;
    margin: 0; 
    padding: 0;
    overflow: hidden;
    background-color: rgb(51, 51, 51);
    position: sticky;
    top: 0;
    z-index: 100;
}

ul::after {
    content: "";
    clear: both;
    display: table;
}

li {
    float: left;
}

li a {
    display: block; 
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

li a:hover {
    background-color: #99CCFF;
    color: #333333;

.active {
    background-color: #04AA6D;
}


img {
    max-width: 100%;
    height: auto;
    border-radius: 8px; 
    display: inline-block;
}


.flex-container {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    justify-content: space-between;
    margin: 20px;
}


.grille-images {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px;
}


input[type="text"], 
input[type="email"] {
    width: 100%;
    padding: 10px;
    margin: 5px 0 15px 0;
    border: 1px solid #ccc;
    border-radius: 4px;
}

input[type="submit"] {
    background-color: #99CCFF;
    color: #336699;
    font-weight: bold;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
}

footer {
    background-color: #888;
    color: gold;
    text-align: center;
    padding: 15px;
    margin-top: 40px;
}