/* Site header / navigation */

.site-header {
    position: sticky;
    top: 0;
    z-index: 300;
    background: var(--color-bg);
}

.site-header.site-header--home {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
}

/* Always-visible bar - stays above overlay and dropdown on mobile */
.site-header__bar {
    position: relative;
    z-index: 3;
    background: var(--color-bg);
    box-shadow: 0 1px 0 rgba(47, 43, 38, 0.08);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: var(--site-header-height);
    padding-block: 0.5rem;
}

.site-header--inner .site-header__inner {
    justify-content: space-between;
}

.site-header--home .site-header__inner {
    justify-content: flex-end;
}

.site-header--home.site-header--nav-logo-visible .site-header__inner {
    justify-content: space-between;
}

.site-header__brand {
    display: block;
    flex-shrink: 0;
    margin-left: var(--header-logo-inset);
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.site-header__brand--hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    width: 0;
    min-width: 0;
    margin: 0;
    overflow: hidden;
}

.site-header__nav-logo,
.site-header__logo {
    display: block;
    height: clamp(1.75rem, 3.5vw, 2.5rem);
    width: auto;
}

/* Hamburger - three bars morph to X */
.site-nav-toggle {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    border: 1px solid rgba(47, 43, 38, 0.15);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    cursor: pointer;
    flex-shrink: 0;
}

.site-nav-toggle__bar {
    display: block;
    width: 1.25rem;
    height: 2px;
    background: var(--color-text-nav);
    border-radius: 1px;
    transform-origin: center;
    transition:
        transform 0.32s cubic-bezier(0.4, 0, 0.2, 1),
        opacity 0.22s ease,
        width 0.22s ease;
}

.site-nav-toggle--open .site-nav-toggle__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.site-nav-toggle--open .site-nav-toggle__bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.site-nav-toggle--open .site-nav-toggle__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.site-nav-backdrop {
    display: none;
}

/* Search + primary nav - search sits immediately left of nav links */
.site-header__nav-group {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: clamp(1rem, 2.5vw, 2.5rem);
    flex: 1 1 auto;
    min-width: 0;
}

.site-header__nav-group .site-nav-dropdown {
    flex: 0 1 auto;
}

/* Primary nav - inline in header row on desktop */
.site-nav-dropdown {
    display: flex;
    flex: 1 1 auto;
    align-items: center;
    justify-content: flex-end;
    min-width: 0;
}

.site-nav {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-nav-gap);
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-nav a {
    font-family: var(--font-sans);
    font-size: var(--text-nav);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-ui);
    color: var(--color-text-nav);
    text-decoration: none;
    white-space: nowrap;
    transition: color var(--transition-fast);
}

.site-nav a:hover {
    color: var(--color-text-nav-active);
}

.site-nav a.is-active {
    color: var(--color-text-nav-active);
}

.site-header__search {
    position: relative;
    flex: 0 1 16rem;
    min-width: 10rem;
    max-width: 18rem;
}

.site-header__search-label {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Inverted newsletter field: light fill + dark type on the light header bar */
.site-header__search-input {
    width: 100%;
    box-sizing: border-box;
    padding: 0.5rem calc(0.5rem + 0.875rem) 0.5rem 0.75rem;
    border: 1px solid rgba(47, 43, 38, 0.22);
    border-radius: var(--radius-sm);
    background-color: #f7f5f2;
    font-family: var(--font-sans);
    font-size: var(--text-nav);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-ui);
    color: #2f2b26;
    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        color var(--transition-fast);
}

.site-header__search-input::placeholder {
    color: rgba(47, 43, 38, 0.5);
    opacity: 1;
}

.site-header__search-input:focus {
    outline: none;
    border-color: rgba(47, 43, 38, 0.45);
    background-color: #ffffff;
    color: #2f2b26;
}

.site-header__search-input::-webkit-search-decoration,
.site-header__search-input::-webkit-search-results-button {
    -webkit-appearance: none;
    appearance: none;
}

/* Native clear is positioned inconsistently; use .site-header__search-clear instead */
.site-header__search-input::-webkit-search-cancel-button {
    -webkit-appearance: none;
    appearance: none;
    display: none;
}

.site-header__search-input::-moz-search-clear {
    display: none;
}

.site-header__search-clear {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    bottom: 0.5rem;
    width: 0.875rem;
    margin: 0;
    padding: 0;
    border: none;
    border-radius: 0;
    background: center / contain no-repeat url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%232f2b26'%3E%3Cpath d='M18.3 5.71a1 1 0 0 0-1.41 0L12 10.59 7.11 5.7A1 1 0 0 0 5.7 7.11L10.59 12l-4.89 4.89a1 1 0 1 0 1.41 1.41L12 13.41l4.89 4.89a1 1 0 0 0 1.41-1.41L13.41 12l4.89-4.89a1 1 0 0 0 0-1.4z'/%3E%3C/svg%3E");
    cursor: pointer;
    opacity: 0.85;
}

.site-header__search-clear:hover {
    opacity: 1;
}

.site-header__search-clear:focus-visible {
    outline: 2px solid rgba(47, 43, 38, 0.45);
    outline-offset: 1px;
}

.site-header__search-results {
    position: absolute;
    z-index: 400;
    top: calc(100% + 0.35rem);
    right: 0;
    left: 0;
    min-width: 18rem;
    max-height: min(24rem, 70vh);
    overflow: auto;
    margin: 0;
    padding: 0.35rem 0;
    list-style: none;
    background: var(--color-bg);
    border: 1px solid rgba(47, 43, 38, 0.12);
    border-radius: var(--radius-sm);
    box-shadow: 0 8px 24px rgba(47, 43, 38, 0.12);
}

@media (min-width: 87.5rem) {
    .site-header__nav-group .site-nav-dropdown {
        justify-content: flex-end;
    }
}

.site-header__search-status {
    margin: 0;
    padding: 0.65rem 0.85rem;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    color: var(--color-text-nav);
    opacity: 0.75;
}

.site-header__search-result {
    display: grid;
    gap: 0.15rem;
    padding: 0.55rem 0.85rem;
    text-decoration: none;
    color: inherit;
    border-left: 2px solid transparent;
}

.site-header__search-result:hover,
.site-header__search-result.is-active {
    background: rgba(47, 43, 38, 0.05);
    border-left-color: var(--color-text-nav-active);
}

.site-header__search-result-type {
    font-family: var(--font-sans);
    font-size: 0.625rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: rgba(47, 43, 38, 0.55);
}

.site-header__search-result-title {
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-nav);
}

.site-header__search-result-excerpt {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    line-height: 1.35;
    color: rgba(47, 43, 38, 0.7);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

@media (min-width: 87.5rem) {
    .site-header {
        box-shadow: 0 1px 0 rgba(47, 43, 38, 0.08);
    }

    .site-header__bar {
        box-shadow: none;
    }

    .site-nav-toggle {
        display: none;
    }

    .site-header--home:not(.site-header--nav-logo-visible) .site-header__nav-group {
        flex: 1 1 auto;
        justify-content: flex-end;
    }
}

@media (max-width: 87.4375rem) {
    .site-header__nav-group {
        flex: 1 1 auto;
        justify-content: flex-end;
    }

    .site-header__search {
        display: none;
    }

    /*
     * Fixed on all routes - sticky + .site-main { zoom } lets page content paint
     * above the bar on inner pages; home already used fixed.
     */
    .site-header {
        position: fixed;
        left: 0;
        right: 0;
        top: 0;
        width: 100%;
        z-index: 1000;
    }

    .site-header--inner + .site-main {
        padding-top: var(--site-header-height);
    }

    .site-header--home .site-header__inner,
    .site-header--home.site-header--nav-logo-visible .site-header__inner {
        justify-content: space-between;
    }

    .site-header--home .site-header__brand--hidden {
        width: 2.75rem;
        min-width: 2.75rem;
    }

    .site-nav-toggle {
        display: inline-flex;
    }

    /* Nav leaves the flex row and becomes a fixed panel below the bar */
    .site-nav-dropdown {
        position: fixed;
        left: 0;
        right: 0;
        top: var(--site-header-height);
        z-index: 2;
        flex: none;
        display: block;
        margin: 0;
        padding: 0;
        overflow: hidden;
        justify-content: stretch;
        background: var(--color-bg);
        box-shadow: 0 12px 32px rgba(47, 43, 38, 0.16);
        clip-path: inset(0 0 100% 0);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition:
            clip-path 0.36s cubic-bezier(0.4, 0, 0.2, 1),
            opacity 0.28s cubic-bezier(0.4, 0, 0.2, 1),
            visibility 0.36s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .site-nav-dropdown.is-open {
        clip-path: inset(0 0 0 0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .site-nav-backdrop {
        display: block;
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        top: var(--site-header-height);
        z-index: 1;
        margin: 0;
        padding: 0;
        border: none;
        background: rgba(30, 26, 22, 0.52);
        cursor: pointer;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition:
            opacity 0.32s cubic-bezier(0.4, 0, 0.2, 1),
            visibility 0.32s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .site-nav-backdrop.is-visible {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .site-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 0.5rem var(--space-page-x) 1.25rem;
    }

    .site-nav a {
        display: block;
        padding: 0.85rem 0;
        border-bottom: 1px solid rgba(47, 43, 38, 0.08);
    }

    .site-nav li:last-child a {
        border-bottom: none;
    }
}

@media (max-width: 480px) {
    .site-nav {
        padding-inline: 1.25rem;
    }
}

/* Full-width nav on large / 4K viewports (no layout-max cap on header inner) */
@media (min-width: 1920px) {
    .site-header .arpm-container {
        width: 100%;
        max-width: none;
    }
}

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