/*
 * Site Header
 * Template: header.php
 * Script:   js/site-header.js (mobile toggle)
 * Auto-enqueued by functions.php after css/theme.css.
 *
 * White bar with the green logo by default. On the front page header.php
 * adds .site-header--on-hero, which paints it the hero's primary green with
 * the white logo so header and hero read as one block.
 */

/* Visually hidden, still read by screen readers (skip link, toggle label). */
.screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

.skip-link:focus {
    position: fixed;
    top: var(--space-sm);
    left: var(--space-sm);
    z-index: 3;
    width: auto;
    height: auto;
    margin: 0;
    padding: var(--space-xs) var(--space-md);
    clip: auto;
    clip-path: none;
    color: var(--color-contrast);
    background-color: var(--color-primary);
    border-radius: .5rem;
}

.site-header {
    --header-color: var(--color-primary);
    position: relative;
    z-index: 2;
    padding-block: var(--space-lg);
    color: var(--header-color);
    background-color: var(--color-background);
}

.site-header--on-hero {
    --header-color: var(--color-contrast);
    background-color: var(--color-primary);
}

.site-header__nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
}

.site-header__brand {
    display: block;
    flex-shrink: 0;
    line-height: 0;
}

.site-header__logo {
    display: block;
    width: auto;
    height: var(--space-2xl);
}

.site-header__panel {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.site-header__menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.site-header__menu a {
    display: inline-block;
    padding-bottom: var(--space-2xs);
    color: var(--header-color);
    font-size: var(--text-0);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s ease-in-out, color 0.3s ease-in-out;
}

.site-header__menu a:hover,
.site-header__menu a:focus-visible {
    border-bottom-color: currentColor;
}

/* Current page: underlined in the header colour. */
.site-header__menu .current-menu-item > a,
.site-header__menu .current-menu-ancestor > a,
.site-header__menu .current_page_parent > a {
    border-bottom-color: currentColor;
}

/*
 * Members Area button: the theme's outline button (outline.contrast on the
 * green front-page header, set in header.php), made compact, with a divider
 * line before it. Colours and hover states come from css/theme.css.
 */
.site-header__cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2xs);
    padding: var(--space-xs) var(--space-md);
    margin-left: var(--space-2xs);
    position: relative;
}

/* User icon, masked so it takes the button's text colour on both headers and on hover. */
.site-header__cta-icon {
    flex-shrink: 0;
    width: var(--space-md);
    height: var(--space-md);
    background-color: currentColor;
    -webkit-mask: url('../../assets/graphics/members-area-btn-icon.svg') center / contain no-repeat;
    mask: url('../../assets/graphics/members-area-btn-icon.svg') center / contain no-repeat;
}

.site-header__cta::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: calc(-1 * (var(--space-md) + var(--space-2xs)) / 2);
    border-left: 2px solid var(--header-color);
}

/* Toggle: three bars drawn in CSS, only shown below the desktop breakpoint. */
.site-header__toggle {
    display: none;
    position: relative;
    width: var(--space-xl);
    height: var(--space-xl);
    padding: 0;
    color: var(--header-color);
    background: none;
    border: 2px solid currentColor;
    border-radius: .5rem;
    cursor: pointer;
}

.site-header__toggle-bars,
.site-header__toggle-bars::before,
.site-header__toggle-bars::after {
    content: "";
    position: absolute;
    left: 50%;
    width: var(--space-md);
    height: 2px;
    translate: -50% -50%;
    background-color: currentColor;
    transition: rotate 0.3s ease-in-out, top 0.3s ease-in-out, opacity 0.3s ease-in-out;
}

.site-header__toggle-bars {
    top: 50%;
}

.site-header__toggle-bars::before {
    top: calc(50% - var(--space-2xs));
}

.site-header__toggle-bars::after {
    top: calc(50% + var(--space-2xs));
}

.is-open .site-header__toggle-bars {
    background-color: transparent;
}

.is-open .site-header__toggle-bars::before {
    top: 50%;
    rotate: 45deg;
}

.is-open .site-header__toggle-bars::after {
    top: 50%;
    rotate: -45deg;
}

@media screen and (max-width: 1024px) {

    .site-header {
        padding-block: var(--space-md);
    }

    .site-header__nav {
        flex-wrap: wrap;
        gap: var(--space-md);
    }

    .site-header__toggle {
        display: block;
    }

    /* The panel drops below the bar as a stacked list. Only collapsible once the script has run. */
    .site-header__panel {
        flex-basis: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-md);
        padding-top: var(--space-md);
        border-top: 2px solid var(--header-color);
    }

    .has-nav-js .site-header__panel {
        display: none;
    }

    .has-nav-js.is-open .site-header__panel {
        display: flex;
    }

    .site-header__menu {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-2xs);
    }

    .site-header__menu a {
        display: block;
        padding: var(--space-2xs) 0;
        border-bottom-width: 0;
        border-left: 2px solid transparent;
    }

    .site-header__menu a:hover,
    .site-header__menu a:focus-visible,
    .site-header__menu .current-menu-item > a,
    .site-header__menu .current-menu-ancestor > a,
    .site-header__menu .current_page_parent > a {
        border-bottom-color: transparent;
        border-left-color: currentColor;
        padding-left: var(--space-xs);
    }

    .site-header__cta {
        margin-left: 0;
        justify-content: center;
    }

    .site-header__cta::before {
        display: none;
    }

}