/* ===================================================== */
/* HEADER (MOBILE FIXED)                                 */
/* ===================================================== */
.page-header {
    transform: translateY(0);
    will-change: transform;
    backface-visibility: hidden;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    z-index: 5000;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    padding-inline: var(--container-padding); }

.page-header.is-hidden {
    transform: translateY(-120%);
}

/* Transition douce pour le logo */
.header-logo {
    height: 40px;
    transition: opacity 0.9s ease 0.9s;
}

/* Effet au clic/tap */
.logo-link:active img.header-logo {
    transform: translateY(-50%) scale(0.95);
    opacity: 0.8;
}

/* =======================================================
   BOUTON BURGER (ZONE TACTILE)
   ======================================================= */
.menu-toggle {
    position: absolute;
    right: 16px;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 9999;
}

/* Feedback au clic */
.menu-toggle:active {
    opacity: 0.7;
}

img.header-logo {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
}

/* =======================================================
   BURGER (SVG)
   ======================================================= */
.burger-icon {
    width: 24px;
    height: 24px;
}

.burger-icon line {
    stroke: var(--vert-principal);
    /* couleur des lignes */
    stroke-width: 1.2;
    stroke-linecap: round;
    transition: transform .2s ease, opacity .2s ease;
    transform-origin: 50% 50%;
    will-change: transform, opacity;
    backface-visibility: hidden;
}


.menu-toggle .top, .menu-toggle .middle, .menu-toggle .bottom {
    transform: rotate(0deg) translate(0, 0);
}

.menu-toggle.open .top {
    transform: rotate(45deg) translate(0px, 6px);
}

.menu-toggle.open .middle {
    opacity: 0;
}

.menu-toggle.open .bottom {
    transform: rotate(-45deg) translate(0px, -6px);
}

@media (min-width: 769px) {
    .page-header {
        transform: translateY(-120%);
        pointer-events: none;
    }
}

/* ===============================
   MOBILE + DESKTOP NAV (merged)
=============================== */
/* MOBILE NAV (overlay) */
.main-nav {
    position: fixed;
    inset: 0;
    background: #ffffff;
    backdrop-filter: blur(12px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-100%);
    transition: opacity .35s ease, transform .35s ease;
    z-index: 4500;
}

.main-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
    /* animation vers le bas */
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding: 0;
    margin: 0;
}

.nav-links a {
    text-decoration: none;
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: var(--vert-fonce);
    font-weight: 300;
}

/* DESKTOP NAV (clean, no box) */
@media (min-width: 769px) {
    .main-nav {
        position: fixed;
        background: none;
        backdrop-filter: none;
        opacity: 1;
        pointer-events: auto;
        transform: none;
        transition: none;
        background: rgba(250, 252, 251, 0.8);
        display: flex;
        justify-content: center;
        padding: 5px;
        height: 44px;
        backdrop-filter: blur(10px);
    }

    .nav-links {
        flex-direction: row;
        gap: 3rem;
    }

    .nav-links a {
        font-size: 0.7rem;
        font-weight: 100;
        letter-spacing: 0.01em;
        color: var(--gris-fonce);
        position: relative;
        transition: color 0.2s ease;
    }

}

/* ===================================================== */
/* FOOTER                                                */
/* ===================================================== */
footer {
    background: var(--vert-fonce);
    color: var(--blanc);
    text-align: center;
    padding: 80px;
    font-size: .95rem;
    min-height: 160px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

footer p {
    margin: 4px 0;
}

.footer-sub {
    font-size: 0.85rem;
    opacity: 0.8;
}

.footer-motto {
    font-weight: 500;
    letter-spacing: 0.04em;
    margin-top: 0.75rem;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.85);
}