html {
    scroll-behavior: smooth;
}

.site-nav {
    --site-nav-top: 0px;

    position: fixed;
    top: var(--site-nav-top);
    right: 0;
    left: 0;
    z-index: 100;
    font-family: "ACTS Inter", Arial, sans-serif;
}

/* The admin bar is fixed above everything, so the header starts below it. */
body.admin-bar .site-nav {
    --site-nav-top: 32px;
}

.site-nav__bar {
    position: relative;
    z-index: 2;
    background: var(--acts-navy-light);
    box-shadow: 0 1px 0 rgb(255 249 239 / 10%);
}

.site-nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    height: var(--site-nav-height);
}

.site-nav__logo {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
}

.site-nav__logo img {
    width: auto;
    height: clamp(1.75rem, 2.6vw, 2.25rem);
}

.site-nav__list {
    display: flex;
    align-items: center;
    gap: clamp(1.5rem, 4vw, 4rem);
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-nav__link {
    position: relative;
    display: inline-block;
    padding-block: 0.4rem;
    color: var(--acts-cream);
    font-size: clamp(0.875rem, 1.05vw, 1rem);
    font-weight: 500;
    line-height: 1.2;
    text-decoration: none;
    white-space: nowrap;
}

.site-nav__link::after {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 3px;
    background: var(--acts-orange);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.22s ease;
    content: "";
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link[aria-current="true"]::after {
    transform: scaleX(1);
}

.site-nav__toggle {
    display: none;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    margin-right: -0.6rem;
    padding: 0;
    border: 0;
    background: none;
    color: inherit;
    cursor: pointer;
}

/* Absolute bars so the two strokes cross dead centre when they rotate into an X. */
.site-nav__bars {
    position: relative;
    width: 1.5rem;
    height: 18px;
}

.site-nav__bars span {
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: var(--acts-cream);
    transform-origin: center center;
    transition:
        transform 0.28s ease,
        opacity 0.18s ease;
}

.site-nav__bars span:nth-child(1) {
    top: 0;
}

.site-nav__bars span:nth-child(2) {
    top: 8px;
}

.site-nav__bars span:nth-child(3) {
    top: 16px;
}

.site-nav--open .site-nav__bars span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.site-nav--open .site-nav__bars span:nth-child(2) {
    opacity: 0;
}

.site-nav--open .site-nav__bars span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.site-nav__panel {
    position: fixed;
    top: calc(var(--site-nav-top) + var(--site-nav-height));
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1;
    display: none;
    overflow-y: auto;
    padding: clamp(2rem, 8vw, 3.5rem) 0 4rem;
    background: var(--acts-navy);
    transform: translateX(100%);
    transition:
        transform 0.32s cubic-bezier(0.32, 0.72, 0, 1),
        visibility 0.32s;
    visibility: hidden;
}

.site-nav--open .site-nav__panel {
    transform: translateX(0);
    visibility: visible;
}

.site-nav__list--mobile {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: var(--safe-content-width);
    margin-inline: auto;
}

.site-nav__item--mobile + .site-nav__item--mobile {
    border-top: 1px solid rgb(255 249 239 / 14%);
}

.site-nav__link--mobile {
    display: block;
    padding-block: 1.15rem;
    font-size: clamp(1.35rem, 6vw, 1.75rem);
    font-weight: 600;
    white-space: normal;
}

.site-nav__link--mobile::after {
    display: none;
}

.site-nav__link--mobile[aria-current="true"] {
    color: var(--acts-orange);
}

.site-nav__link--facebook {
    display: inline-flex;
    align-items: center;
}

.site-nav__link--facebook svg {
    width: 1.3rem;
    fill: currentColor;
}

.site-nav__link--facebook.site-nav__link--mobile {
    gap: 0.75rem;
}

.site-nav__link--facebook.site-nav__link--mobile svg {
    flex: 0 0 auto;
    width: 1.5rem;
}

body.site-nav-open {
    overflow: hidden;
}

@media (max-width: 1000px) {
    .site-nav__desktop {
        display: none;
    }

    .site-nav__toggle {
        display: flex;
    }

    .site-nav__panel {
        display: block;
    }
}

/* Below 782px the admin bar grows; below 600px it stops being fixed entirely. */
@media screen and (max-width: 782px) {
    body.admin-bar .site-nav {
        --site-nav-top: 46px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .site-nav__panel,
    .site-nav__bars span,
    .site-nav__link::after {
        transition-duration: 0.01ms;
    }
}