/* Site header — fixed, transparent over hero, subtle backdrop when scrolled. */

.site-nav {
    position: fixed;
    inset-block-start: 0;
    inset-inline: 0;
    z-index: var(--z-header);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: var(--space-4) var(--space-5);
    color: var(--color-bg);
    transition: background var(--dur-slow) var(--ease-out),
                color var(--dur-slow) var(--ease-out),
                border-color var(--dur-slow) var(--ease-out);
    border-block-end: 1px solid transparent;
}

.site-nav.is-solid {
    background: var(--site-glow-ivory);
    color: var(--color-text);
    border-block-end-color: var(--color-border);
    backdrop-filter: saturate(1.1) blur(8px);
    -webkit-backdrop-filter: saturate(1.1) blur(8px);
}

.site-nav.is-open {
    background: var(--color-text);
    color: var(--color-bg);
    border-block-end-color: rgba(255, 255, 255, 0.06);
}

/* — Hamburger — */

.site-nav__hamburger {
    justify-self: start;
    display: inline-flex;
    flex-direction: column;
    gap: 6px;
    width: 40px;
    height: 40px;
    padding: 10px 6px;
    background: transparent;
    border: 0;
    color: currentColor;
    align-items: stretch;
    justify-content: center;
}

.site-nav__hamburger span {
    display: block;
    height: 1.5px;
    background: currentColor;
    transition: transform var(--dur-base) var(--ease-out),
                opacity var(--dur-fast) var(--ease-out);
}

.site-nav.is-open .site-nav__hamburger span:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
}
.site-nav.is-open .site-nav__hamburger span:nth-child(2) {
    opacity: 0;
}
.site-nav.is-open .site-nav__hamburger span:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
}

/* — Brand mark — */

.site-nav__brand {
    justify-self: center;
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
    color: currentColor;
    text-decoration: none;
    line-height: 1;
    position: relative;
    padding-block-end: 14px;
}

.site-nav__brand-script {
    font-family: var(--font-script);
    font-size: 26px;
    line-height: 1;
    transform: translateY(-2px);
    opacity: 0.95;
}

.site-nav__brand-serif {
    font-family: var(--font-serif);
    font-weight: 500;
    letter-spacing: 0.28em;
    font-size: 22px;
}

.site-nav__brand-sub {
    position: absolute;
    inset-block-end: 0;
    inset-inline-start: 50%;
    transform: translateX(-50%);
    font-size: 9px;
    letter-spacing: 0.34em;
    text-transform: uppercase;
    opacity: 0.85;
    white-space: nowrap;
}

/* — Language pill — */

.site-nav__langs {
    justify-self: end;
    display: inline-flex;
    gap: var(--space-3);
    align-items: center;
}

.site-nav__lang-form {
    margin: 0;
}

.site-nav__lang {
    background: transparent;
    color: currentColor;
    border: 0;
    padding: 6px 4px;
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    opacity: 0.65;
    transition: opacity var(--dur-fast) var(--ease-out);
}

.site-nav__lang:hover,
.site-nav__lang.is-active {
    opacity: 1;
}

.site-nav__lang.is-active {
    text-decoration: underline;
    text-underline-offset: 5px;
}

/* — Drawer overlay — */

.site-nav__drawer {
    position: fixed;
    inset-block-start: var(--site-nav-size);
    inset-block-end: 0;
    inset-inline: 0;
    background: var(--color-text);
    color: var(--color-bg);
    padding: clamp(var(--space-6), 8vw, var(--space-8));
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    z-index: calc(var(--z-header) - 1);
    animation: site-nav-fade-in var(--dur-slow) var(--ease-out);
}

.site-nav__drawer[hidden] {
    display: none;
}

.site-nav__menu ul {
    display: flex;
    flex-direction: column;
    gap: clamp(var(--space-4), 2vw, var(--space-5));
    padding-block-start: clamp(var(--space-6), 8vh, var(--space-8));
}

.site-nav__link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    color: currentColor;
    font-family: var(--font-serif);
    font-weight: 300;
    font-size: clamp(28px, 5vw, 56px);
    line-height: 1.1;
    text-decoration: none;
    letter-spacing: 0.005em;
    transition: opacity var(--dur-fast) var(--ease-out),
                transform var(--dur-base) var(--ease-out);
    opacity: 0.85;
}

.site-nav__link:hover,
.site-nav__link.is-current {
    opacity: 1;
    transform: translateX(6px);
}

[dir="rtl"] .site-nav__link:hover,
[dir="rtl"] .site-nav__link.is-current {
    transform: translateX(-6px);
}

.site-nav__bullet {
    display: inline-block;
    width: 6px;
    height: 6px;
    background: currentColor;
    border-radius: 50%;
    opacity: 0.5;
}

.site-nav__drawer-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block-start: var(--space-6);
    border-block-start: 1px solid rgba(255, 255, 255, 0.08);
}

.btn-ghost--light {
    color: var(--color-bg);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-ghost--light:hover {
    background: var(--color-bg);
    color: var(--color-text);
    border-color: var(--color-bg);
}

@keyframes site-nav-fade-in {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* — Compact viewports — */

@media (max-width: 720px) {
    .site-nav__brand-sub { font-size: 8px; letter-spacing: 0.3em; }
    .site-nav__brand-serif { font-size: 18px; }
    .site-nav__brand-script { font-size: 22px; }
}