```css
/* =========================================================
   RESET ET BASE
========================================================= */

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

html {
    min-width: 320px;
}

body {
    margin: 0;
    padding: 0;
    min-height: 100vh;

    background-image: url("/MEDIAS/FOND.jpg");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;

    display: flex;
    flex-direction: column;
}

/* =========================================================
   MENU
========================================================= */

#menu {

    min-height: 80px;

    display: flex;
    justify-content: space-between;
    align-items: center;

    padding: 0 clamp(1rem, 4vw, 3.125rem);

    border-bottom: solid white 2px;

    background-color: rgba(255, 255, 255, 0);
    transition: background-color 0.05s linear;

    box-shadow: 0 5px 5px #009a1f20;

    z-index: 1;
}

.homeimg {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.homeimg img {
    display: block;
    height: clamp(2.5rem, 5vw, 3.125rem);
    width: auto;
    max-width: 100%;
}

/* Navigation */

#menu ul {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: clamp(1rem, 4vw, 3.125rem);

    margin: 0;
    padding: 0;

    list-style: none;
}

#menu ul li {
    margin: 0;
    padding: 0;
}

#menu ul li a {
    display: block;

    text-decoration: none;

    font-family: "Titillium Web", sans-serif;
    font-weight: 600;
    font-style: normal;

    color: black;

    white-space: nowrap;
}

.txtmenu {
    color: rgba(255, 255, 255, 255);
    transition: color 0.05s linear;
}

#menu ul li a:hover {
    text-decoration: underline;
}

/* =========================================================
   CONTENU PRINCIPAL
========================================================= */

main {
    flex: 1;

    width: 100%;
    max-width: 1200px;

    margin: 0 auto;
    padding: clamp(2rem, 6vw, 5rem) clamp(1rem, 4vw, 2rem)
             clamp(3rem, 6vw, 5rem);
}

main > div {
    width: min(100%, 800px);
    margin: 0 auto;
}

/* Titre */

h1 {
    margin: 0 0 clamp(2rem, 5vw, 4rem);

    padding: 0;

    text-align: center;
    text-decoration: underline;

    font-family: "Titillium Web", sans-serif;
    font-weight: 700;
    font-style: normal;

    color: #009a1e;

    font-size: clamp(2.5rem, 7vw, 4rem);
    line-height: 1.1;

    overflow-wrap: break-word;
}

/* Contacts */

main div p {
    margin: clamp(1.25rem, 4vw, 3.125rem) 0 0;

    padding: 0 clamp(0.25rem, 2vw, 1rem);

    text-align: center;

    font-family: "Titillium Web", sans-serif;
    font-weight: 700;
    font-style: normal;

    color: black;

    font-size: clamp(1.125rem, 3vw, 1.5rem);
    line-height: 1.4;

    overflow-wrap: anywhere;
    word-break: break-word;
}

main div p:first-of-type {
    margin-top: 0;
}

main div p:hover {
    text-decoration: underline;
}

main div p a {
    color: black;
    text-decoration: none;

    overflow-wrap: anywhere;
}

/* =========================================================
   FOOTER
========================================================= */

footer {
    

    min-height: 100px;

    padding: clamp(1.25rem, 3vw, 2rem)
             clamp(1rem, 4vw, 3rem);

    background-color: white;

    box-shadow: 0 -5px 5px #009a1f20;
}

footer .listefooter {
    width: 100%;
    max-width: 1400px;

    margin: 0 auto;
    padding: 0;

    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: center;
    gap: clamp(1rem, 3vw, 3rem);

    list-style: none;

    font-family: "Titillium Web", sans-serif;
    font-weight: 700;
    font-style: normal;
}

footer .listefooter > li {
    width: auto;
    min-width: 0;
}

/* Contact */

.contact {
    margin: 0;
    padding: 0;

    list-style: none;

    overflow-wrap: anywhere;
}

/* Réseaux */

.reseaux {
    margin: 0;
    padding: 0;

    list-style: none;
}

.reseaux li {
    width: auto;
    margin-top: 5px;
}

.imgreseaux {
    display: flex;
    align-items: center;
    flex-wrap: wrap;

    gap: 0.75rem;

    width: 100%;

    margin: 0;
    padding: 0;

    list-style: none;
}

.imgreseaux li {
    display: flex;
    align-items: center;

    width: auto;
    margin: 0;
}

.imgreseaux li a {
    display: flex;
    align-items: center;
}

.imgreseaux li img {
    display: block;

    width: clamp(1.5rem, 4vw, 1.875rem);
    height: auto;

    max-width: 100%;
}

/* =========================================================
   TABLETTE
========================================================= */

@media (max-width: 768px) {

    #menu {
        min-height: 70px;
    }

    footer .listefooter {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    footer .listefooter > li:last-child {
        grid-column: 1 / -1;
    }
}

/* =========================================================
   MOBILE
========================================================= */

@media (max-width: 480px) {

    #menu {
        min-height: auto;

        flex-direction: column;
        justify-content: center;

        gap: 0.75rem;

        padding-top: 0.75rem;
        padding-bottom: 0.75rem;
    }

    .homeimg img {
        height: 2.5rem;
    }

    #menu ul {
        width: 100%;

        justify-content: center;

        gap: clamp(0.75rem, 5vw, 1.5rem);

        flex-wrap: wrap;
    }

    #menu ul li a {
        font-size: 0.9rem;
    }

    main {
        padding-top: 2rem;
        padding-bottom: 3rem;
    }

    main div p {
        padding-right: 0;
        padding-left: 0;
    }

    footer .listefooter {
        grid-template-columns: 1fr;

        text-align: center;
    }

    footer .listefooter > li:last-child {
        grid-column: auto;
    }

    .contact,
    .reseaux {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .imgreseaux {
        justify-content: center;
    }
}
```