/* ============================================================
   HEADER — Sticky navigation with glassmorphism
   ============================================================ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    height: var(--header-height);
    display: flex;
    align-items: center;
    transition: background var(--transition-base), box-shadow var(--transition-base), height var(--transition-base);
    background: transparent;
}

/* Scrolled state */
.site-header.scrolled {
    height: var(--header-height-scroll);
    background: rgba(250, 247, 242, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 2px 24px rgba(139, 107, 66, 0.12);
}

.site-header.scrolled .nav__logo-text {
    color: var(--color-brown-dark);
}

.site-header.scrolled .nav__logo-subtitle {
    color: var(--color-gray-stone);
}

.site-header.scrolled .nav__link {
    color: var(--color-brown-dark);
}

/* ── Header container ──────────────────────────────────── */
.header__inner {
    width: 100%;
    max-width: var(--container-2xl);
    margin-inline: auto;
    padding-inline: var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-8);
}

/* ── Logo ───────────────────────────────────────────────── */
.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
    text-decoration: none;
}

.nav__logo-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.nav__logo-text {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--color-warm-white);
    line-height: 1;
    transition: color var(--transition-base);
}

.nav__logo-subtitle {
    font-family: var(--font-cursive);
    font-size: var(--text-xs);
    font-style: italic;
    color: rgba(253, 249, 245, 0.8);
    letter-spacing: 0.05em;
    line-height: 1;
    transition: color var(--transition-base);
}

/* ── Navigation ─────────────────────────────────────────── */
.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav__item {
    position: relative;
}

.nav__link {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: rgba(253, 249, 245, 0.92);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: var(--space-1);
    transition: color var(--transition-fast), background var(--transition-fast);
    cursor: pointer;
    white-space: nowrap;
    text-decoration: none;
}

.nav__link:hover,
.nav__link.active {
    color: var(--color-warm-white);
    background: rgba(255, 255, 255, 0.12);
}

.site-header.scrolled .nav__link:hover,
.site-header.scrolled .nav__link.active {
    color: var(--color-brown-carmelo);
    background: rgba(139, 107, 66, 0.08);
}

.nav__arrow {
    font-size: 10px;
    transition: transform var(--transition-fast);
}

.nav__item:hover .nav__arrow {
    transform: rotate(180deg);
}

/* ── Dropdown ───────────────────────────────────────────── */
.nav__dropdown {
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-warm-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
    padding: var(--space-2);
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateX(-50%) translateY(-8px);
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
    z-index: var(--z-dropdown);
}

.nav__item:hover .nav__dropdown,
.nav__item:focus-within .nav__dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
    transform: translateX(-50%) translateY(0);
}

.nav__dropdown a {
    display: block;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    color: var(--color-text);
    transition: background var(--transition-fast), color var(--transition-fast);
    text-decoration: none;
}

.nav__dropdown a:hover {
    background: rgba(139, 107, 66, 0.08);
    color: var(--color-brown-carmelo);
}

/* ── Hamburger ──────────────────────────────────────────── */
.nav__hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
    cursor: pointer;
    background: none;
    border: none;
    z-index: var(--z-modal);
}

.nav__hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-warm-white);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base), background var(--transition-base);
}

.site-header.scrolled .nav__hamburger span {
    background: var(--color-brown-dark);
}

.nav__hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.active span:nth-child(2) {
    opacity: 0;
}

.nav__hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile nav ─────────────────────────────────────────── */
@media (max-width: 900px) {
    .nav__hamburger {
        display: flex;
    }

    .nav__menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-warm-white);
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        padding: calc(var(--header-height) + var(--space-8)) var(--space-6) var(--space-8);
        gap: 0;
        transform: translateX(100%);
        transition: transform var(--transition-slow);
        z-index: var(--z-overlay);
        overflow-y: auto;
    }

    .nav__menu.menu-open {
        transform: translateX(0);
    }

    .nav__link {
        color: var(--color-text);
        font-size: var(--text-base);
        padding: var(--space-4) var(--space-6);
        border-bottom: 1px solid var(--color-border);
        border-radius: 0;
        justify-content: space-between;
        letter-spacing: 0.04em;
    }

    .nav__dropdown {
        position: static;
        transform: none;
        box-shadow: none;
        border: none;
        border-radius: 0;
        background: rgba(139, 107, 66, 0.04);
        padding: 0 0 var(--space-2) var(--space-4);
        opacity: 1;
        visibility: visible;
        pointer-events: all;
        display: none;
    }

    .nav__item.open .nav__dropdown {
        display: block;
    }

    .nav__item .nav__arrow.active {
        transform: rotate(180deg);
    }
}