html[data-season="ete"] #banner {
    background-image: url("../../images/season/banner-ete.webp");
}

/* Seasonal copy stays hidden until the winter theme is active. */
.season-hiver-only {
    display: none;
}

html[data-season="hiver"] .season-hiver-only {
    display: block;
}

#header nav ul li.season-selector {
    margin-left: 0;
}

#header .season-toggle {
    align-items: center;
    background: rgba(23, 24, 32, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 2em;
    display: inline-flex;
    height: 2.35em;
    line-height: 1;
    padding: 0.18em;
    transition: background-color 0.25s ease, border-color 0.25s ease;
    vertical-align: middle;
}

#header .season-toggle:hover {
    border-color: rgba(255, 255, 255, 0.65);
}

#header nav .season-option {
    align-items: center;
    border-radius: 1.5em;
    color: rgba(255, 255, 255, 0.62);
    display: inline-flex;
    gap: 0.32em;
    height: 1.85em;
    line-height: 1;
    padding: 0 0.7em;
    transition: background-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

html[data-season="ete"] #header nav .season-option-ete,
html[data-season="hiver"] #header nav .season-option-hiver {
    background: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.22);
    color: #272833;
}

#navPanel a[href="#season-toggle"] {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 2em;
    height: auto;
    line-height: 1.3;
    margin: 0.7em 0;
    padding: 0.7em 1em;
    text-align: center;
}