/* ===== Header ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1.5rem 0;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.site-header.scrolled {
    padding: 0.875rem 0;
    background: rgba(12, 12, 12, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(232, 228, 223, 0.06);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.logo {
    font-family: var(--font-heading), 'Cormorant Garamond', serif;
    font-size: 1.375rem;
    font-weight: 500;
    color: var(--color-text);
    letter-spacing: -0.01em;
    transition: opacity 0.3s;
}
.logo:hover { opacity: 0.7; }

.logo-img {
    max-height: 2.5rem;
    width: auto;
}

/* Navigation */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-menu a {
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text_muted);
    transition: color 0.3s;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-menu a:hover {
    color: var(--color-text);
}
.nav-menu a:hover::after {
    width: 100%;
}

/* Hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav-toggle-bar {
    display: block;
    width: 24px;
    height: 1.5px;
    background: var(--color-text);
    transition: all 0.3s;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child {
    transform: translateY(3.75px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child {
    transform: translateY(-3.75px) rotate(-45deg);
}

/* ===== Mobile ===== */
@media (max-width: 768px) {
    .header-inner { padding: 0 1.25rem; }

    .nav-toggle { display: flex; }

    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-background);
        flex-direction: column;
        justify-content: center;
        gap: 0;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.4s, visibility 0.4s;
        z-index: -1;
    }

    .nav-menu.nav-open {
        opacity: 1;
        visibility: visible;
    }

    .nav-menu a {
        font-family: var(--font-heading), 'Cormorant Garamond', serif;
        font-size: 2.5rem;
        letter-spacing: -0.01em;
        text-transform: none;
        font-weight: 400;
        color: var(--color-text);
        padding: 0.5rem 0;
    }

    .nav-menu a::after { display: none; }
}