.msf-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    padding-block: 1.125rem;
    background-color: var(--msf-white);
    border-bottom: 1px solid rgba(214, 223, 223, 0.78);
    box-shadow: none;
    transition: padding 240ms ease, background-color 240ms ease, border-color 240ms ease, box-shadow 240ms ease, backdrop-filter 240ms ease;
}

.msf-header::before {
    position: absolute;
    inset: 0;
    z-index: 0;
    background: linear-gradient(90deg, var(--msf-background) 0%, var(--msf-white) 45%, var(--msf-blue-tint) 100%);
    opacity: 1;
    content: "";
    pointer-events: none;
    transition: opacity 240ms ease;
}

.msf-header.is-scrolled {
    padding-block: var(--msf-space-sm);
    background-color: rgba(250, 249, 245, 0.88);
    border-bottom-color: rgba(214, 223, 223, 0.8);
    box-shadow: 0 0.25rem 1rem rgba(23, 44, 58, 0.06);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
}

.msf-header.is-scrolled::before {
    opacity: 0;
}

.admin-bar .msf-header {
    top: 32px;
}

.msf-header > .inner {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: var(--msf-space-lg);
}

.msf-header__brand {
    display: inline-flex;
    align-items: center;
    color: var(--msf-text);
    text-decoration: none;
}

.msf-header__brand img {
    width: 5.25rem;
    flex: 0 0 auto;
    transition: width 240ms ease;
}

.msf-header.is-scrolled .msf-header__brand img {
    width: 4.625rem;
}

.msf-header__nav {
    margin-left: auto;
}

.msf-header__nav ul {
    display: flex;
    align-items: center;
    gap: 0 clamp(1.1rem, 2vw, 2rem);
    padding: 0;
    margin: 0;
    list-style: none;
}

.msf-header__nav li {
    flex: 0 0 auto;
}

.msf-header__nav a {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    gap: 0.3rem;
    color: var(--msf-text);
    font-size: var(--msf-font-size-body);
    font-weight: 650;
    line-height: 1.2;
    text-decoration: none;
    white-space: nowrap;
    border-bottom: 1px solid transparent;
    transition: color 200ms ease, border-color 200ms ease;
}

.msf-header__nav a:hover,
.msf-header__nav a[aria-current="page"] {
    color: var(--msf-blue-dark);
    border-bottom-color: var(--msf-blue);
}

.msf-header__external {
    color: var(--msf-blue);
    font-size: 1.05em;
}

.msf-header__toggle {
    display: none;
    min-height: 3rem;
    align-items: center;
    gap: var(--msf-space-sm);
    margin-left: auto;
    padding: var(--msf-space-sm) var(--msf-space-md);
    color: var(--msf-text);
    background: var(--msf-white);
    border: 1px solid var(--msf-border);
    border-radius: var(--msf-radius);
    font-weight: 700;
}

.msf-header__toggle-icon,
.msf-header__toggle-icon::before,
.msf-header__toggle-icon::after {
    display: block;
    width: 1.25rem;
    height: 2px;
    border-radius: 999px;
    transition: transform 220ms ease, opacity 220ms ease, background-color 220ms ease;
}

.msf-header__toggle-icon {
    position: relative;
    background: var(--msf-green);
}

.msf-header__toggle-icon::before,
.msf-header__toggle-icon::after {
    position: absolute;
    left: 0;
    background: var(--msf-blue);
    content: "";
}

.msf-header__toggle-icon::before {
    top: -0.4rem;
}

.msf-header__toggle-icon::after {
    top: 0.4rem;
}

.msf-header__toggle[aria-expanded="true"] .msf-header__toggle-icon {
    transform: rotate(45deg);
}

.msf-header__toggle[aria-expanded="true"] .msf-header__toggle-icon::before {
    transform: translateY(0.4rem) rotate(90deg);
}

.msf-header__toggle[aria-expanded="true"] .msf-header__toggle-icon::after {
    opacity: 0;
    transform: translateY(-0.4rem);
}

@media (max-width: 64rem) {
    .msf-header {
        padding-block: var(--msf-space-md);
    }

    .msf-header.is-scrolled {
        padding-block: 0.625rem;
    }

    .msf-header > .inner {
        flex-wrap: wrap;
    }

    .msf-header__brand img {
        width: 4.75rem;
    }

    .msf-header.is-scrolled .msf-header__brand img {
        width: 4.25rem;
    }

    .msf-js .msf-header__toggle {
        display: inline-flex;
    }

    .msf-js .msf-header__nav {
        display: none;
    }

    .msf-js .msf-header__nav.is-open {
        display: block;
    }

    .msf-header__nav {
        width: 100%;
        margin-left: 0;
    }

    .msf-header__nav ul {
        display: grid;
        grid-template-columns: 100%;
        gap: 0;
        padding-top: var(--msf-space-sm);
    }

    .msf-header__nav li {
        border-top: 1px solid var(--msf-border);
    }

    .msf-header__nav a {
        width: 100%;
        min-height: 3.25rem;
        justify-content: space-between;
        border-bottom: 0;
    }

    .msf-header__nav a:hover,
    .msf-header__nav a[aria-current="page"] {
        border-bottom-color: transparent;
    }
}

@media screen and (max-width: 782px) {
    .admin-bar .msf-header {
        top: 46px;
    }
}

@media screen and (max-width: 600px) {
    .admin-bar .msf-header {
        top: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .msf-header,
    .msf-header::before,
    .msf-header__brand img,
    .msf-header__nav a,
    .msf-header__toggle-icon,
    .msf-header__toggle-icon::before,
    .msf-header__toggle-icon::after {
        transition: none;
    }
}