/* ==================== Barre de navigation (top app bar) ==================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 10px 24px;
    background: var(--inv-surface);
    box-shadow: var(--md-elevation-2);
}
.site-brand { display: flex; align-items: center; border-radius: var(--md-radius-sm); }
.site-brand:focus-visible { outline: 2px solid var(--md-accent); outline-offset: 2px; }
.site-logo { height: 44px; width: 44px; display: block; }

.site-nav {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-width: 0;
}
.site-nav-primary,
.site-nav-secondary {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    color: var(--inv-on-surface);
    text-decoration: none;
    background: none;
    border: none;
    /* Rectangle aux coins arrondis plutôt qu'une pastille : s'accorde au logo carre du club. */
    border-radius: var(--md-radius-sm);
    cursor: pointer;
    font: inherit;
    font-weight: 500;
    font-size: 0.92rem;
    white-space: nowrap;
    transition: background-color var(--md-motion), color var(--md-motion);
}
.nav-link:hover { background-color: var(--inv-hover); color: var(--md-accent); }
.nav-link:focus-visible { outline: 2px solid var(--md-accent); outline-offset: 1px; }

/* Bouton "Connexion" mis en avant, style Material "filled button" */
.nav-link--filled {
    background: var(--md-primary);
    color: var(--md-on-primary);
}
.nav-link--filled:hover { background: var(--md-primary-hover); color: var(--md-on-primary); }

.nav-logout-form { display: inline; }

/* Menu déroulant "Administration" (Material dropdown menu) */
.nav-menu { position: relative; }
.nav-menu > summary.nav-menu-summary {
    list-style: none;
}
.nav-menu > summary.nav-menu-summary::-webkit-details-marker { display: none; }
.nav-menu-caret {
    width: 16px;
    height: 16px;
    transition: transform var(--md-motion);
}
.nav-menu[open] .nav-menu-caret { transform: rotate(180deg); }
.nav-menu[open] > summary.nav-menu-summary {
    background-color: var(--inv-hover);
    color: var(--md-accent);
}

.nav-menu-panel {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 220px;
    background: var(--md-surface);
    color: var(--md-on-surface);
    border-radius: var(--md-radius-md);
    box-shadow: var(--md-elevation-3);
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    /* L'en-tête est collant : un panneau plus haut que la fenêtre ne se rattrape pas en faisant
       défiler la page. Il défile donc lui-même ; main.js ajuste la hauteur à l'espace réellement
       disponible, cette valeur n'est qu'un repli. */
    max-height: calc(100vh - 88px);
    max-height: calc(100dvh - 88px);
    overflow-y: auto;
    overscroll-behavior: contain;
    animation: md-menu-in var(--md-motion) ease-out;
}
@keyframes md-menu-in {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.nav-menu-item {
    display: block;
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--md-radius-sm);
    color: var(--md-on-surface);
    text-decoration: none;
    background: none;
    border: none;
    text-align: left;
    font: inherit;
    font-size: 0.92rem;
    cursor: pointer;
    transition: background-color var(--md-motion);
}
.nav-menu-item:hover { background-color: var(--md-surface-container-high); }
/* Icônes du menu : traits fins, couleur du texte, légèrement atténuées hors survol. */
.nav-icon {
    width: 17px;
    height: 17px;
    flex-shrink: 0;
    opacity: 0.85;
}
.nav-link:hover .nav-icon, .nav-link.is-active .nav-icon, .nav-menu-item:hover .nav-icon { opacity: 1; }
.nav-menu-item:has(.nav-icon) {
    display: flex;
    align-items: center;
    gap: 10px;
}
.nav-menu-summary .nav-icon { margin-right: 2px; }
.nav-menu-item--danger { color: var(--md-error); font-weight: 600; }
.nav-menu-item--danger:hover { background-color: var(--md-error-container); }
.nav-menu-separator {
    border: none;
    border-top: 1px solid var(--md-outline-variant);
    margin: 6px 2px;
}
.nav-menu-heading {
    margin: 6px 16px 2px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--md-on-surface-variant);
}

/* Bascule mobile (hamburger) : purement CSS via une case à cocher masquée */
.nav-toggle { display: none; }
.nav-toggle-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 40px;
    height: 40px;
    border-radius: var(--md-radius-sm);
    cursor: pointer;
    margin-left: auto;
}
.nav-toggle-btn span {
    display: block;
    height: 2px;
    background: var(--inv-on-surface);
    border-radius: 2px;
}
.nav-toggle-btn:hover { background-color: var(--inv-hover); }

@media (max-width: 860px) {
    .nav-toggle-btn { display: flex; }
    .site-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        background: var(--inv-surface);
        box-shadow: var(--md-elevation-3);
        /* Pas de marge verticale une fois replie : elle laisserait déborder le premier lien. */
        padding: 0 16px;
        gap: 4px;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--md-motion), padding var(--md-motion);
    }
    .nav-toggle:checked ~ .site-nav { max-height: 80vh; overflow-y: auto; padding: 8px 16px 16px; }
    .site-nav-primary, .site-nav-secondary { flex-direction: column; align-items: stretch; }
    .nav-link { justify-content: flex-start; }
    /* Le menu replie défile déjà en entier : pas de second ascenseur dans le panneau. */
    .nav-menu-panel { position: static; box-shadow: none; margin-top: 4px; background: var(--inv-surface-high);
        max-height: none; overflow: visible; }
    .nav-menu-item { color: var(--inv-on-surface); }
    .nav-menu-item:hover { background-color: var(--inv-hover); }
    /* Intitules de groupe lisibles sur le panneau sombre. */
    .nav-menu-heading { color: var(--inv-placeholder); }
}

/* ==================== Ajustements de thème ==================== */
.site-header { border-bottom: 1px solid var(--md-outline-variant); box-shadow: none; }
/* ==================== Bascule clair / sombre ==================== */
.theme-toggle {
    display: inline-grid;
    place-items: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 50%;
    border: 0;
    background: transparent;
    color: var(--inv-on-surface);
    box-shadow: none;
    cursor: pointer;
}
.theme-toggle:hover { background: var(--inv-hover); color: var(--md-accent); box-shadow: none; }
.theme-toggle:focus-visible { outline: 2px solid var(--md-accent); outline-offset: 2px; }
.theme-toggle svg { width: 20px; height: 20px; }
/* Le bouton montre le thème vers lequel il bascule : la lune en clair, le soleil en sombre. */
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: inline; }
@media screen and (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
    :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: inline; }
}
@media (max-width: 800px) { .theme-toggle { align-self: flex-start; } }