body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}
header {
    background: #333;
    color: #fff;
    padding: 0.1em 0;
    text-align: center;
}

header h1 {
    font-size: 2em;
    margin: 0;
    line-height: 1.2;
}

nav {
    position: fixed;
    width: 100%;
    top: 0;
    background: #444;
    z-index: 1000;
}
nav ul {
    padding: 0;
    margin: 0;
    list-style: none;
    text-align: center;
}
nav ul li {
    display: inline-block;
    margin: 0 15px;
}
nav ul li a {
    color: #fff;
    text-decoration: none;
}
nav ul li a:hover {
    text-decoration: underline;
}
.container {
    width: 90%;
    margin: auto;
    padding-top: 100px;
}
.section {
    margin: 2em 0;
    padding: 2em;
    background: #fff;
    border-radius: 8px;
}
.test {
    width: 100%;
    padding: 1em;
    background: #e4e4f4;
    border-radius: 8px;
    box-sizing: border-box;
}
.description, .documents, .Schéma {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}
.description p {
    max-width: none;
    text-align: left; 
    margin: 0 auto; 
}
.services p, .services a {
    line-height: 1.8; 
    text-align: justify; 
    margin-bottom: 1.5em; 
    padding: 1em; 
    background-color: #ffffff; 
    border-left: 4px solid #444; 
    border-radius: 5px; 
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); 
    color: #333;
    display: block; 
    text-decoration: none; 
}

.services p:hover {
    background-color: #f4f4f4; 
    border-left-color: #386269; 
    color: #000; 
}

.Schéma img {
    border-radius: 8px; 
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); 
}
h2 {
    text-align: center;
    color: #333;
}
footer {
    text-align: center;
    padding: 1em 0;
    background: #333;
    color: #fff;
}
@media (max-width: 768px) {
    .container {
        width: 100%;
        padding: 0 10px;
    }
    nav ul li {
        display: block;
        margin: 10px 0;
    }
}


.back-to-top {
    position: fixed;
    top: 10px;
    left: 10px;
    background: #386269;
    color: #fff;
    padding: 0.5em 1em;
    border-radius: 5px;
    text-decoration: none;
    z-index: 1100;
    opacity: 0.8;
    transition: transform 0.4s ease, opacity 0.3s ease;
}

.back-to-top:hover {
    transform: translateX(-10px); 
    opacity: 1;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    font-size: 16px;
    color: #fff;
    background-color: #386269; 
    text-decoration: none;
    border-radius: 5px; 
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); 
    transition: background-color 0.3s ease, transform 0.2s ease; 
}

.btn:hover {
    background-color: #2c4d50; 
    transform: translateY(-2px); 
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15); 
}