/* =====================================================================
   En-tête du site - un seul fichier pour toutes les pages.
   Chargé APRÈS le CSS de chaque page : remplace la mise en page
   d'en-tête d'origine.

   Disposition :  [liens gauche]   ·   LOGO (centre)   ·   [liens droite]
   Au défilement : <header> reçoit .header-min → le logo rapetisse,
   la barre se resserre, en fondu ; réapparaît en grand en haut de page.
   Mobile (<= 900px) : liens masqués, burger, logo centré.
   ===================================================================== */

header {
	position: sticky;
	top: 0;
	z-index: 50;
	background: rgba(250, 247, 242, 0.9);
	-webkit-backdrop-filter: blur(10px);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid var(--line);
	transition: box-shadow .3s ease, background-color .3s ease;
}
header.header-min {
	background: rgba(250, 247, 242, 0.97);
	box-shadow: 0 8px 24px -16px rgba(30, 43, 42, .55);
}

.nav-bar {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 36px;
	max-width: var(--maxw);
	margin: 0 auto;
	padding: 14px 24px;
	transition: padding .38s ease, gap .38s ease;
}
header.header-min .nav-bar {
	padding-top: 6px;
	padding-bottom: 6px;
	gap: 26px;
}

/* --- Groupes de liens de part et d'autre du logo --- */
.nav-bar .nav-side {
	flex: 1 1 0;
	min-width: 0;
	display: flex;
	align-items: center;
	gap: 26px;
	list-style: none;
	margin: 0;
	padding: 0;
}
.nav-bar .nav-left { justify-content: flex-end; }
.nav-bar .nav-right { justify-content: flex-start; }

.nav-bar .nav-side a,
.nav-bar .nav-dropdown-toggle {
	display: inline-flex;
	align-items: center;
	gap: 5px;
	white-space: nowrap;
	font-family: inherit;
	font-size: .88rem;
	font-weight: 500;
	color: var(--ink-soft);
	text-decoration: none;
	background: none;
	border: 0;
	padding: 4px 0;
	cursor: pointer;
	transition: color .2s ease;
}
.nav-bar .nav-side a:hover,
.nav-bar .nav-dropdown-toggle:hover { color: var(--ink); }
.nav-bar .nav-side a.current,
.nav-bar .nav-dropdown-toggle.current { color: var(--accent-deep); font-weight: 600; }

.nav-bar .chev { width: 11px; height: 11px; flex: none; transition: transform .2s ease; }
.nav-bar .nav-dropdown-toggle[aria-expanded="true"] .chev { transform: rotate(180deg); }

/* --- Logo central --- */
.nav-bar .brand {
	flex: none;
	display: flex;
	align-items: center;
	text-decoration: none;
}
.nav-bar .brand-logo {
	height: clamp(76px, 8.4vw, 110px);
	width: clamp(76px, 8.4vw, 110px);
	border-radius: 50%;
	transition: height .38s ease, width .38s ease;
}
header.header-min .nav-bar .brand-logo {
	height: 44px;
	width: 44px;
}

/* --- Sous-menu "Découvrir" : ancré à droite pour ne pas déborder --- */
.nav-bar .nav-dropdown { position: relative; }
.nav-bar .nav-dropdown-menu {
	position: absolute;
	top: calc(100% + 16px);
	right: 0;
	left: auto;
	transform: translateY(-6px) scale(.97);
	transform-origin: top right;
}
.nav-bar .nav-dropdown-menu.open {
	transform: translateY(0) scale(1);
}

/* --- Bouton « Espace membre » (plateforme de cours) : ouvre Élève / Administrateur --- */
.nav-bar .nav-membre { position: relative; flex: none; }
.nav-bar .nav-espace {
	display: inline-flex;
	align-items: center;
	gap: 7px;
	white-space: nowrap;
	font-family: inherit;
	font-size: .88rem;
	padding: 8px 16px;
	border: 0;
	border-radius: 999px;
	background: var(--accent-deep);
	color: #fff;
	font-weight: 600;
	cursor: pointer;
	box-shadow: 0 8px 18px -10px rgba(30, 43, 42, .7);
	transition: background-color .2s ease, transform .2s ease;
}
.nav-bar .nav-espace:hover,
.nav-bar .nav-espace[aria-expanded="true"] { background: var(--ink); transform: translateY(-1px); }
.nav-bar .nav-espace:focus-visible { outline: 2px solid var(--accent-deep); outline-offset: 3px; }
.nav-bar .nav-espace svg { width: 16px; height: 16px; flex: none; }
.nav-bar .nav-espace .chev { width: 11px; height: 11px; transition: transform .2s ease; }
.nav-bar .nav-espace[aria-expanded="true"] .chev { transform: rotate(180deg); }
header.header-min .nav-bar .nav-espace { padding: 6px 14px; }
/* le bouton est du côté gauche du logo : menu ancré à gauche */
.nav-bar .nav-dropdown-menu.nav-membre-menu { min-width: 250px; left: 0; right: auto; transform-origin: top left; }
.nav-bar .nav-membre-menu a { display: flex; flex-direction: column; align-items: flex-start; text-align: left; gap: 2px; font-weight: 600; color: var(--ink); }
.nav-bar .nav-membre-menu a span { font-size: .76rem; font-weight: 400; color: var(--ink-soft); }
@media (max-width: 1180px) { .nav-bar .nav-side { gap: 18px; } }

/* Menu mobile : « Espace membre » en tête, deux boutons Élève / Administrateur */
.mobile-menu .mobile-membre { margin-bottom: 10px; }
.mobile-menu .mobile-membre-titre {
	font-size: .72rem; letter-spacing: .18em; text-transform: uppercase;
	color: var(--accent-deep); font-weight: 600; margin: 0 0 8px;
}
.mobile-menu .mobile-membre-choix { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.mobile-menu a.mobile-espace {
	background: var(--accent-deep);
	color: #fff;
	border-radius: 999px;
	text-align: center;
	justify-content: center;
	font-weight: 600;
}
.mobile-menu a.mobile-espace-admin { background: transparent; color: var(--accent-deep); border: 1.5px solid var(--accent-deep); }

/* Pied de page : bloc « Espace membre », séparé de la navigation */
footer .footer-col .footer-membre {
	margin: 16px 0 6px; font-size: .72rem; letter-spacing: .14em; text-transform: uppercase;
	color: var(--ink-soft); font-weight: 600;
}
footer .footer-col a.footer-espace { color: var(--accent-deep); font-weight: 600; }
footer .footer-col a.footer-admin { color: var(--accent-deep); }

/* --- Burger : caché sur grand écran --- */
.nav-bar .burger { display: none; }

/* ---------------------------------------------------------------------
   Mobile
   --------------------------------------------------------------------- */
@media (max-width: 900px) {
	.nav-bar {
		justify-content: center;
		gap: 0;
		padding: 14px 24px;
	}
	.nav-bar .nav-side { display: none; }
	.nav-bar .brand-logo { height: 60px; width: 60px; }
	header.header-min .nav-bar .brand-logo { height: 42px; width: 42px; }
	.nav-bar .burger {
		display: inline-flex;
		align-items: center;
		justify-content: center;
		position: absolute;
		right: 18px;
		top: 50%;
		transform: translateY(-50%);
		width: 44px;
		height: 44px;
		background: none;
		border: 0;
		padding: 8px;
		border-radius: 8px;
		cursor: pointer;
	}
	.nav-bar .burger:hover { background: var(--paper-alt); }
	.nav-bar .burger span,
	.nav-bar .burger span::before,
	.nav-bar .burger span::after {
		content: "";
		display: block;
		width: 22px;
		height: 2px;
		background: var(--ink);
		position: relative;
		transition: transform .25s ease, opacity .2s ease;
	}
	.nav-bar .burger span::before { position: absolute; top: -7px; }
	.nav-bar .burger span::after { position: absolute; top: 7px; }
	.nav-bar .burger[aria-expanded="true"] span { background: transparent; }
	.nav-bar .burger[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
	.nav-bar .burger[aria-expanded="true"] span::after { top: 0; transform: rotate(-45deg); }
}

@media (prefers-reduced-motion: reduce) {
	header, .nav-bar, .nav-bar .brand-logo { transition: none; }
}