/* Novastra - navigation */

.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
    background: color-mix(in srgb, var(--c-bg) 92%, transparent);
    backdrop-filter: saturate(180%) blur(8px);
    -webkit-backdrop-filter: saturate(180%) blur(8px);
    border-bottom: 1px solid var(--c-line);
}

.site-header__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.site-logo {
    font-family: var(--f-mono);
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0.2em;
    color: var(--c-ink);
    text-transform: uppercase;
    display: inline-flex;
    align-items: baseline;
    gap: var(--s-1);
}

.site-logo::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    background: var(--c-accent);
    border-radius: 50%;
    margin-right: var(--s-2);
    vertical-align: middle;
    transform: translateY(-2px);
}

.site-nav {
    display: none;
    align-items: center;
    gap: var(--s-6);
}

@media (min-width: 960px) {
    .site-nav {
        display: flex;
    }
}

.site-nav a {
    position: relative;
    font-size: 14px;
    font-weight: 500;
    color: var(--c-ink-soft);
    padding: 6px 0;
    transition: color var(--dur-micro) var(--ease-out-expo);
}

.site-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    height: 1px;
    width: 0;
    background: var(--c-ink);
    transition: width var(--dur-micro) var(--ease-out-expo);
}

.site-nav a:hover {
    color: var(--c-ink);
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
    width: 100%;
}

.site-actions {
    display: flex;
    align-items: center;
    gap: var(--s-3);
}

.theme-toggle {
    width: 36px;
    height: 36px;
    border: 1px solid var(--c-line);
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--c-ink-soft);
    transition: border-color var(--dur-micro), color var(--dur-micro);
}

.theme-toggle:hover {
    border-color: var(--c-ink-soft);
    color: var(--c-ink);
}

.theme-toggle svg {
    width: 16px;
    height: 16px;
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.nav-toggle {
    display: inline-flex;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--c-line);
    border-radius: var(--radius-sm);
}

@media (min-width: 960px) {
    .nav-toggle { display: none; }
}

.nav-drawer {
    position: fixed;
    inset: 0;
    background: var(--c-bg);
    z-index: var(--z-drawer);
    padding: var(--s-7) var(--gutter);
    transform: translateX(100%);
    transition: transform var(--dur-section) var(--ease-out-expo);
}

.nav-drawer.is-open {
    transform: translateX(0);
}

.nav-drawer__list {
    display: flex;
    flex-direction: column;
    gap: var(--s-4);
    list-style: none;
    padding: 0;
    margin-top: var(--s-7);
}

.nav-drawer__list a,
.nav-drawer__link-btn {
    font-family: var(--f-display);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--c-ink);
}

.nav-drawer__link-btn {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    text-align: left;
}