/* Header partagé SkiesAtlas — bloc extrait de style.css (2026-09-07), rendu
   autonome pour fonctionner aussi sur les pages du site (chargées avec site.css).
   Les 7 variables nécessaires sont embarquées ici ; leurs noms n'existent pas
   dans site.css -> aucun conflit. */
:root{
  --primary:#2563eb;
  --white:#ffffff;
  --gray-100:#f3f4f6;
  --gray-700:#374151;
  --radius-sm:8px;
  --shadow-lg:0 10px 25px rgba(0,0,0,0.1);
  --transition:0.2s ease;
}
/* conteneur de largeur — base absente de site.css, requise par la barre */
.container{max-width:1200px;margin:0 auto;padding:0 1.25rem}
.header {
    background: #253e5c;
    color: var(--white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 12px rgba(37,62,92,0.4);
}
.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--white);
    letter-spacing: -0.5px;
}
.logo:hover { color: var(--white); }
.logo svg { color: var(--white); opacity: 0.9; }

.nav { display: flex; align-items: center; gap: 1.5rem; }
.nav a {
    color: rgba(255,255,255,0.85);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.4rem 0;
    position: relative;
    transition: all var(--transition);
}
.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--white);
    transition: width 0.3s;
}
.nav a:hover { color: var(--white); }
.nav a:hover::after { width: 100%; }

/* Login button */
.nav a.nav-login-btn {
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.25);
    padding: 0.4rem 0.9rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--white);
    position: static;
}
.nav a.nav-login-btn::after { content: none; }
.nav a.nav-login-btn:hover { background: rgba(255,255,255,0.22); }

/* Lang selector */
.lang-selector { position: relative; }
.lang-btn {
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    color: var(--white);
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--transition);
}
.lang-btn:hover { background: rgba(255,255,255,0.25); }
.lang-dropdown {
    position: absolute;
    top: 100%;
    padding-top: 4px;
    right: 0;
    background: transparent;
    min-width: 80px;
    display: none;
    z-index: 200;
}
.lang-dropdown-inner {
    background: var(--white);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}
.lang-selector:hover .lang-dropdown { display: block; }
.lang-dropdown a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--gray-700) !important;
    font-weight: 500;
    font-size: 0.85rem;
    background: var(--white);
}
.lang-dropdown a:hover { background: var(--gray-100); color: var(--gray-700) !important; }
.lang-dropdown a.active { background: var(--primary); color: var(--white) !important; }
.lang-dropdown a.active:hover { background: #1d4ed8; color: var(--white) !important; }

/* Mobile menu */
.mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; padding: 8px; -webkit-tap-highlight-color: transparent; }
.mobile-menu-btn span {
    display: block; width: 24px; height: 2px;
    background: var(--white); margin: 5px 0;
    transition: var(--transition);
}
.nav-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100vh;
    background: rgba(0,0,0,0.5); opacity: 0; visibility: hidden;
    transition: all 0.3s ease; z-index: 1010;
}
.nav-overlay.active { opacity: 1; visibility: visible; }

/* ============ RESPONSIVE / MENU BURGER (2026-09-07) ============ */
@media (max-width: 768px) {
    .mobile-menu-btn { display: block; z-index: 1030; }
    .nav {
        position: fixed;
        top: 64px;
        right: 0;
        width: min(80vw, 320px);
        height: calc(100vh - 64px);
        background: #253e5c;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        gap: 0;
        padding: 0.75rem 1.25rem 2rem;
        transform: translateX(105%);
        transition: transform 0.28s ease;
        box-shadow: -10px 0 30px rgba(0,0,0,0.35);
        overflow-y: auto;
        z-index: 1020;   /* au-dessus de l'overlay (1010) sinon les liens ne sont pas cliquables */
    }
    .nav.active { transform: translateX(0); }
    .nav a {
        width: 100%;
        padding: 0.9rem 0.2rem;
        font-size: 1rem;
        border-bottom: 1px solid rgba(255,255,255,0.10);
        display: flex; align-items: center; gap: 0.6rem;
    }
    .nav a::after { content: none; }
    .nav a.nav-login-btn {
        width: 100%; justify-content: center; text-align: center;
        margin-top: 0.9rem; padding: 0.8rem; font-size: 0.95rem;
        border-bottom: none;
    }
    /* sélecteur de langue -> chips visibles directement (pas de hover en mobile) */
    .lang-selector { width: 100%; margin-top: 1.1rem; }
    .lang-btn { display: none; }
    .lang-dropdown { position: static; display: block; padding-top: 0; }
    .lang-dropdown-inner {
        background: transparent; box-shadow: none;
        display: flex; flex-wrap: wrap; gap: 8px;
    }
    .lang-dropdown a {
        background: rgba(255,255,255,0.10); border-radius: 6px;
        color: #fff !important; padding: 0.45rem 0.8rem; font-weight: 700;
    }
    .lang-dropdown a.active { background: var(--primary); color: #fff !important; }
    /* animation burger -> croix */
    .mobile-menu-btn.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
    .mobile-menu-btn.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}