/* ==========================================================================
   En-tête — transparent sur le Hero, blanc au scroll
   ========================================================================== */

.icon-inline {
    width: 1.1em;
    height: 1.1em;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.6;
    flex-shrink: 0;
}

.site-header {
    position: fixed;
    inset-inline: 0;
    top: 0;
    z-index: var(--z-header);
    background-color: transparent;
    transition: background-color var(--transition-medium), box-shadow var(--transition-medium),
        padding var(--transition-medium);
}

.site-header__inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    transition: height var(--transition-medium);
}

.site-header__brand {
    display: flex;
    align-items: center;
    z-index: 1;
}

.site-header__logo {
    height: 64px;
    width: 64px;
    object-fit: contain;
    border-radius: 50%;
    transition: height var(--transition-medium);
    box-shadow: 0 2px 14px rgba(34, 34, 34, 0.12);
}

.site-nav__list {
    display: none;
}

.site-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.site-header__cta {
    display: none;
}

.btn-sm {
    padding: 0.7em 1.5em;
    font-size: 0.75rem;
}

/* --- Bouton "burger" ------------------------------------------------------ */

.site-header__toggle {
    position: relative;
    z-index: 1;
    width: 44px;
    height: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.site-header__toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: transform var(--transition-fast), opacity var(--transition-fast),
        background-color var(--transition-fast);
}

.site-header.is-transparent .site-header__toggle span {
    background-color: var(--color-white);
}

.site-header__toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.site-header__toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.site-header__toggle[aria-expanded="true"] span {
    background-color: var(--color-text) !important;
}

/* --- États : transparent sur le hero, plein au scroll --------------------- */

.site-header.is-transparent {
    background-color: transparent;
    box-shadow: none;
}

.site-header.is-transparent .site-header__logo {
    box-shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
}

.site-header:not(.is-transparent) {
    background-color: rgba(250, 248, 245, 0.92);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-soft);
}

.site-header:not(.is-transparent) .site-header__inner {
    height: var(--header-height-scrolled);
}

.site-header:not(.is-transparent) .site-header__logo {
    height: 52px;
    width: 52px;
}

.site-header.is-transparent .site-nav__link {
    color: var(--color-white);
}

/* --- Menu plein écran (mobile) --------------------------------------------- */

.mobile-nav {
    position: fixed;
    inset: 0;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    background-color: var(--color-bg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity var(--transition-medium), visibility var(--transition-medium),
        transform var(--transition-medium);
}

.mobile-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mobile-nav__list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.mobile-nav__link {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--color-text);
}

.mobile-nav__link:hover {
    color: var(--color-gold);
}

.mobile-nav__phone {
    display: inline-flex;
    align-items: center;
    gap: 0.6em;
    color: var(--color-text-soft);
}

/* --- Écrans larges ---------------------------------------------------------- */

@media (min-width: 1024px) {
    .site-nav__list {
        display: flex;
        gap: var(--space-lg);
    }

    .site-nav__link {
        position: relative;
        font-size: var(--fs-small);
        font-weight: 500;
        letter-spacing: 0.03em;
        color: var(--color-text);
        transition: color var(--transition-fast);
    }

    .site-nav__link::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: -6px;
        width: 0;
        height: 1px;
        background-color: currentColor;
        transition: width var(--transition-fast);
    }

    .site-nav__link:hover::after {
        width: 100%;
    }

    .site-header__cta {
        display: inline-flex;
    }

    .site-header__toggle {
        display: none;
    }

    .mobile-nav {
        display: none;
    }
}