header.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: aliceblue;
    border-bottom: 1px solid #cff5fd;
}

.site-header > div {
    max-width: 75%;
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

#logo {
    width: 48px;
    height: auto;
    margin: 0;
    vertical-align: bottom;
}

.site-header > div > a {
    font-size: 2rem;
    font-weight: bold;
    text-decoration: none;
    color: #6b8b76;
}

.main-nav {
    display: flex;
    align-items: center;
    margin-left: auto;
    position: sticky;
    top: 0;
}

.main-nav ul {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0;
    padding: 0;
}
 
.main-nav ul li {
    position: relative;
}
 
.main-nav > ul > li.dropdown {
    padding: 0 6px;
}

.main-nav ul::after{
    content: "";
    display: table;
    clear: both;
}

.main-nav a {
    display: block;
    padding: 10px 0;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    color: black;
}

/* Sous-menu */
.submenu {
    display: none;
    opacity: 0;
    pointer-events: none;
    width: 100%;
    box-shadow: 0px 1px 2px #CCC;
    background: #ffffff;
    position: absolute;
    z-index: 1000;
}

.submenu.show {
    display: block;
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.submenu li {
    float: none;
    width: 100%;
    text-align: left;
}

.submenu a {
    font-size: 14px;
    padding: 10px;
    border-bottom: none;
}

.submenu a:hover {
    border-bottom: none;
    background-color: RGBa(200,200,200,0.1);
    padding-left: 16px;
    outline: none;
  }

.dropdown {
    padding: 0 10px;
}

.dropdown > a::after {
    content: '▼';
    font-size: 12px;
}

#btn-soutenir {
    background-color: #e58e26;
    border-radius: 10px;
    color: #fff;
    padding-right: 12px;
    padding-left: 12px;

}

.submenu-soutenir {
    background-color: #e58e26;
}
.submenu-soutenir li a,
.submenu-soutenir li a:hover {
    color: #fff;
}



/* bouton de menu (déclenche les sous-menus) */
.menu-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: #384e6b;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    padding: 10px 6px;
    display: flex;
    align-items: center;
    gap: 6px;
    position: relative;
}

.menu-btn::after {
    content: '';
    width: 7px;
    height: 7px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg);
    transition: transform 0.25s ease;
    margin-top: -3px;
}

.dropdown.open .menu-btn::after {
    transform: rotate(225deg);
    margin-top: 3px;
}


.menu-btn::before,
.main-nav > ul > li > a::before {
    content: '';
    position: absolute;
    left: 6px;
    right: 6px;
    bottom: 4px;
    height: 2px;
    background: #162560;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.25s ease;
}

#btn-soutenir::before {
    display: none;
}

.nav-toggle {
    display: none;
    background: none;
    border: 1px solid var(--blue);
    border-radius: 8px;
    width: 42px;
    height: 42px;
    cursor: pointer;
    padding: 0;
    align-items: center;
    justify-content: center;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
content: '';
display: block;
width: 20px;
height: 2px;
background: var(--blue);
position: relative;
transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { transform: rotate(45deg); top: 0; }
.nav-toggle.open span::after { transform: rotate(-45deg); top: 0; }

.menu-btn:hover::before,
.menu-btn:focus-visible::before,
.dropdown.open .menu-btn::before,
.main-nav > ul > li > a:hover::before,
.main-nav > ul > li > a:focus-visible::before {
    transform: scaleX(1);
}

.main-nav > ul > li > a {
    display: block;
    position: relative;
    padding: 10px 6px;
    text-decoration: none;
    color: #384e6b;
    font-weight: 500;
    font-size: 0.95rem;
}

.menu-btn:hover,
.menu-btn:focus-visible,
.main-nav a:hover,
.main-nav a:focus-visible {
    color: #162560;
}

#btn-soutenir:hover {
    background-color: #f39b32;
}

@media (max-width: 780px) {

    .site-header > div {
        max-width: 100%;
    }
    .nav-toggle { display: flex; }

    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: aliceblue;
        border-bottom: 1px solid #eef1f5;
        display: none;
    }
    .main-nav.open {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 8px 16px 16px;
    }

    .main-nav > ul > li {
        border-right: none;
        border-bottom: 1px solid #eef1f5;
    }

    .main-nav > ul > li:last-child {
        border-bottom: none;
    }

    .menu-btn:hover, .menu-btn:focus-visible,
    .main-nav a:hover,
    .main-nav a:focus-visible  {
        outline: none;
    }

    .menu-btn::before,
    .main-nav > ul > li > a::before {
        display: none;
    }

    .dropdown,
    .main-nav > ul > li.dropdown {
        padding: 0;
    }

    .submenu {
        position: static;
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        background: #f2f4ff;
    }

    #btn-soutenir {
        background-color: unset;
        color: #e58e26;
        padding: 10px 6px;
    }

    .submenu-soutenir li a {
        color: #e58e26;
    }
}