/* ============================================
   HEADER PARTAGE — Les Ateliers du Stream
   ============================================ */

/* --- Base (toutes pages sauf home) --- */
header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(31,34,68,0.08);
    transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 40px; max-width: var(--max-width); margin: 0 auto;
}
.logo img { height: 84px; transition: var(--t); }

nav { flex: 1; text-align: center; }
nav ul { display: inline-flex; list-style: none; gap: 28px; align-items: center; justify-content: center; }
nav a {
    font-family: var(--font-texte); font-size: 0.82rem; font-weight: 600;
    color: var(--primary); text-transform: uppercase; letter-spacing: 0.8px;
    transition: var(--t); position: relative;
}
nav a:hover { color: var(--accent); }
nav a::after {
    content: ''; position: absolute; bottom: -6px; left: 50%; transform: translateX(-50%);
    width: 0; height: 2px; background: var(--at-primary); transition: var(--t);
}
nav a:hover::after { width: 100%; }
nav a.active { color: var(--at-primary); }
nav a.active::after { width: 100%; }

.menu-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 5px; }
.menu-toggle span { width: 24px; height: 2px; background: var(--primary); border-radius: 2px; transition: var(--t); }

/* --- Home variant (body.home) --- */
body.home header {
    background: transparent;
    backdrop-filter: none;
    box-shadow: none;
}
body.home header.scrolled {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(31,34,68,0.08);
}

.logo .logo-light { display: none; }
body.home .logo .logo-light { display: block; }
body.home .logo .logo-dark { display: none; }
body.home header.scrolled .logo .logo-light { display: none; }
body.home header.scrolled .logo .logo-dark { display: block; }

body.home nav a { color: var(--blanc); }
body.home header.scrolled nav a { color: var(--primary); }
body.home nav a:hover { color: var(--accent); }

body.home .menu-toggle span { background: var(--blanc); }
body.home header.scrolled .menu-toggle span { background: var(--primary); }

/* --- Responsive 1024px --- */
@media (max-width: 1024px) {
    nav ul { gap: 18px; }
    nav a { font-size: 0.78rem; }
}

/* --- Responsive 815px --- */
@media (max-width: 815px) {
    .header-inner { padding: 14px 20px; }
    .menu-toggle { display: flex; }
    nav {
        display: none; position: absolute; top: 100%; left: 0; right: 0;
        background: var(--blanc);
        padding: 20px; box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    }
    nav.active { display: block; }
    nav.active a { color: var(--primary) !important; }
    nav ul {
        display: flex; flex-direction: column; gap: 14px;
        text-align: center;
    }
}