/* ═══════════════════════════════════════════════════════════════
   REFONTE 2026-10 — socle de l'en-tête commun pour les pages qui ne chargent pas /css/styles.css (combicata).
   Copie des règles .nav* de styles.css (inchangées) + variables utilisées par refonte.css.
   À charger AVANT le CSS propre à la page, puis refonte.css.
   ═══════════════════════════════════════════════════════════════ */
:root {
    --charcoal: #1a1a1a;
    --white: #ffffff;
    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Jost', -apple-system, sans-serif;
    --ease: cubic-bezier(0.25, 1, 0.5, 1);
}

/* ─────────────────────────────────────────────────────────────
   NAVIGATION — Ultra minimal
   ───────────────────────────────────────────────────────────── */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.6s var(--ease);
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 1rem 2rem;
    box-shadow: 0 1px 0 rgba(0,0,0,0.05);
}

.nav.dark {
    background: rgba(0,0,0,0.9);
    backdrop-filter: blur(20px);
}

.nav-logo {
    height: 36px;
    filter: brightness(0) invert(1);
    transition: filter 0.4s;
}

.nav.scrolled .nav-logo {
    filter: none;
}

.nav-links {
    display: none;
    gap: 3rem;
}

@media (min-width: 1024px) {
    .nav-links {
        display: flex;
    }
}

.nav-link {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s;
    position: relative;
}

.nav.scrolled .nav-link {
    color: var(--charcoal);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--gold);
    transition: width 0.4s var(--ease);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-menu-btn {
    width: 28px;
    height: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

@media (min-width: 1024px) {
    .nav-menu-btn {
        display: none;
    }
}

.nav-menu-btn span {
    width: 100%;
    height: 1px;
    background: white;
    transition: all 0.3s;
}

.nav.scrolled .nav-menu-btn span {
    background: var(--charcoal);
}

@media (max-width: 1023px) {
    .nav-menu-btn {
        position: relative;
        z-index: 1003;
        width: 44px;
        height: 44px;
        flex-shrink: 0;
        align-items: center;
        justify-content: center;
        gap: 6px;
        margin: -12px -8px -12px 0;
    }

    .nav-menu-btn span {
        width: 28px;
        flex-shrink: 0;
    }

    .nav-links {
        position: fixed;
        inset: 0;
        z-index: 1000;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: clamp(1.25rem, 4vh, 2.25rem);
        padding: 7rem 2rem 5rem;
        background: rgba(18, 18, 18, 0.98);
        backdrop-filter: blur(20px);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateY(-1rem);
        transition: opacity 0.25s ease, visibility 0s linear 0.25s, transform 0.25s ease;
        overflow-y: auto;
    }

    .nav.mobile-menu-open .nav-links {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateY(0);
        transition-delay: 0s;
    }

    .nav.mobile-menu-open .nav-link {
        color: white;
        font-size: clamp(0.9rem, 4vw, 1.1rem);
        letter-spacing: 0.18em;
    }

    .nav.mobile-menu-open .nav-logo {
        position: relative;
        z-index: 1002;
        filter: brightness(0) invert(1);
    }

    .nav.mobile-menu-open .nav-actions {
        position: relative;
        z-index: 1002;
    }

    .nav.mobile-menu-open .nav-menu-btn span {
        position: absolute;
        background: white;
    }

    .nav.mobile-menu-open .nav-menu-btn span:nth-child(1) {
        transform: rotate(45deg);
    }

    .nav.mobile-menu-open .nav-menu-btn span:nth-child(2) {
        opacity: 0;
    }

    .nav.mobile-menu-open .nav-menu-btn span:nth-child(3) {
        transform: rotate(-45deg);
    }

    body.mobile-menu-open {
        overflow: hidden;
    }
}

@media (max-width: 380px) {
    .nav,
    .nav.scrolled {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .nav-logo {
        height: 30px;
    }

    .nav-actions,
    .nav-actions .nav-lang {
        gap: 0;
        margin-right: 0.25rem !important;
    }

    .nav-login-btn {
        width: 36px;
        height: 36px;
    }
}

/* Nav Actions & Login */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-left: auto;
    margin-right: 1rem;
}

@media (max-width: 1023px) {
    .nav-actions {
        margin-right: 1rem;
    }
}