/*
 * Site header and primary navigation.
 * Markup: header.php plus Boostie_Nav_Walker (inc/class-boostie-nav-walker.php).
 * Behavior: js/nav.js. Every open/closed state is driven by aria-expanded.
 *
 * Desktop: logo | centered nav | CTA, with mega panels under the nav.
 * At 960px and below: logo | "Menu" button, and the menu drops down as one panel.
 */
:root {
  --header-height: 70px;
  --header-mobile-height: 56px;
  --header-bg: light-dark(var(--white), var(--gray-900));
  --header-border: 1px solid light-dark(var(--gray-300), var(--gray-800));
  --header-radius: var(--radius-large);

  --nav-gap: 36px;
  --nav-link-color: light-dark(var(--gray-700), var(--gray-300));
  --nav-link-hover-color: light-dark(var(--black), var(--white));
  --nav-caret-color: var(--green);
  --nav-caret-open-color: var(--red);

  --nav-panel-bg: light-dark(var(--white), var(--gray-900));
  --nav-panel-padding: var(--space-20);
  --nav-column-gap: var(--space-32);
  --nav-column-width: 200px; /* fixed so columns line up. Longer text wraps. */
  --nav-heading-color: light-dark(var(--black), var(--gray-200));
  --nav-title-color: light-dark(var(--blurple), var(--blurple-light));
  --nav-desc-color: light-dark(var(--gray-600), var(--gray-500));
  --nav-link-hover-bg: light-dark(var(--gray-000), var(--gray-800));
  --nav-link-arrow-color: var(--blurple);
  --nav-link-pad: 4px 8px;

  --nav-transition: .15s ease;
}

/* front-page announcement bar (ACF option top_bar_content) */
.top-bar {
  display: none;

  @media (width > 960px) {
    display: flex;
    height: 30px;
    background-color: var(--purple-light);
    border-bottom: 1px solid var(--purple);
    color: var(--purple-darker);
  }
}

.site-header-wrap {
  position: sticky;
  top: 20px;
  z-index: 214000;

  @media (width <= 960px) {
    padding-inline: var(--space-20);
  }

  /* squeeze pages (header-blank.php) don't stick */
  &:has(.site-header--blank) {
    position: relative;
  }
}

.site-header {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: var(--header-height);
  padding-inline: var(--space-20);
  background-color: var(--header-bg);
  border: var(--header-border);
  border-radius: var(--header-radius);
  box-shadow: var(--shadow-soft-1);
  font-family: var(--font-family-sans-serif);
}

.site-header__logo {
  display: flex;
  justify-self: start;

  .logo {
    display: block;
  }
}

/* desktop: the wrapper disappears and nav + CTA become grid columns 2 and 3 */
.site-header__menu {
  display: contents;
}

.site-header__cta {
  justify-self: end;
  gap: var(--space-16);
  font-weight: var(--font-weight-normal);

  i {
    font-size: 16px;
  }
}

.site-header__toggle {
  display: none;
}

/* nav (nested under .site-nav to outrank the base link rule in base.css) */
.site-nav {
  position: relative;
  justify-self: center;

  ul {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .site-nav__list {
    display: flex;
    align-items: center;
    gap: var(--nav-gap);
  }

  /* old mobile-only CTA menu items. The header CTA covers this now. */
  .mobile-cta-link {
    display: none;
  }

  .site-nav__top-link,
  .site-nav__trigger {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 0;
    border: 0;
    background: none;
    /* `font` is a shorthand that resets weight, size, etc., so it must come
       before any individual font-* property */
    font: inherit;
    font-size: var(--font-size-med);
    font-weight: var(--font-weight-medium);
    color: var(--nav-link-color);
    text-decoration: none;
    cursor: pointer;
    transition: color var(--nav-transition);

    &[aria-current],
    &[data-current] {
      color: var(--nav-link-hover-color);
    }

    @media (hover: hover) {
      &:hover {
        color: var(--nav-link-hover-color);
      }
    }

    &:focus-visible {
      outline: 2px solid var(--nav-link-hover-color);
      outline-offset: 4px;
      border-radius: 2px;
    }
  }

  /* caret: green ↘ closed, red ↗ open (Remix arrow-right-down / -up) */
  .site-nav__trigger::after {
    content: "\ea6a";
    font-family: var(--font-family-icon);
    font-size: 14px;
    line-height: 1;
    color: var(--nav-caret-color);
    transition: var(--transition-default);
  }

  .site-nav__trigger[aria-expanded="true"]::after {
    content: "\ea70";
    color: var(--nav-caret-open-color);
  }

  /* mega panel, centered under the nav */
  .site-nav__panel {
    position: absolute;
    top: 100%;
    left: 50%;
    z-index: 10;
    display: none;
    padding: var(--nav-panel-padding);
    background-color: var(--nav-panel-bg);
    border: var(--header-border);
    border-radius: var(--radius-base);
    box-shadow: var(--shadow-soft-2);
    opacity: 0;
    translate: -50% 6px;
    transition:
      opacity var(--nav-transition),
      translate var(--nav-transition),
      display var(--nav-transition) allow-discrete;
  }

  .site-nav__trigger[aria-expanded="true"] + .site-nav__panel {
    display: block;
    opacity: 1;
    translate: -50% 0;

    @starting-style {
      opacity: 0;
      translate: -50% 6px;
    }
  }

  /* one fixed-width column per level-2 item */
  .site-nav__columns {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: var(--nav-column-width);
    column-gap: var(--nav-column-gap);
  }

  .site-nav__heading {
    display: block;
    margin-bottom: 14px;
    font-size: var(--font-size-sm);
    color: var(--nav-heading-color);
    text-decoration: none;
  }

  .site-nav__links {
    display: grid;
    gap: 2px;
  }

  /* Hover: shaded background plus a sliding arrow, matching the 2025 nav.
     The padding is offset by a negative margin so text stays aligned with
     the column heading. */
  .site-nav__link {
    display: grid;
    padding: var(--nav-link-pad);
    margin-inline: -8px;
    border-radius: var(--radius-base);
    font-size: var(--font-size-sm);
    line-height: 1.35;
    text-decoration: none;
    transition: background-color var(--nav-transition);

    &:hover,
    &:focus-visible {
      background-color: var(--nav-link-hover-bg);

      .site-nav__title::after {
        opacity: 1;
        translate: 0 0;
      }
    }

    &:focus-visible {
      outline: 2px solid var(--nav-title-color);
      outline-offset: 0;
    }
  }

  .site-nav__title {
    color: var(--nav-title-color);

    &::after {
      content: "\ea6c";
      display: inline-block;
      margin-left: 6px;
      font-family: var(--font-family-icon);
      line-height: 1;
      color: var(--nav-link-arrow-color);
      opacity: 0;
      translate: -6px 0;
      transition: opacity var(--nav-transition), translate var(--nav-transition);
    }
  }

  .site-nav__desc {
    color: var(--nav-desc-color);
  }
}

/* mobile and tablet */
.site-header__toggle-icon {
  position: relative;
  width: 14px;
  height: 8px;

  &::before,
  &::after {
    content: "";
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--green);
    transition: translate var(--nav-transition), rotate var(--nav-transition), background-color var(--nav-transition);
  }

  &::before { top: 0; }
  &::after { bottom: 0; }
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon {
  &::before,
  &::after {
    background-color: var(--red);
  }

  &::before { translate: 0 3px; rotate: 45deg; }
  &::after { translate: 0 -3px; rotate: -45deg; }
}

@media (width <= 960px) {
  .site-header {
    grid-template-columns: 1fr auto;
    height: var(--header-mobile-height);
    padding-inline: var(--space-16);
  }

  .site-header__logo .logo {
    width: 120px;
    height: auto;
  }

  .site-header__toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border: 0;
    border-radius: var(--radius-base);
    background: none;
    font: inherit;
    font-size: var(--font-size-sm);
    color: var(--nav-link-color);
    cursor: pointer;

    @media (hover: hover) {
      &:hover {
        background-color: light-dark(var(--gray-100), var(--gray-800));
      }
    }
  }

  .site-header__menu {
    position: absolute;
    top: calc(100% + 8px);
    inset-inline: 0;
    display: none;
    flex-direction: column;
    gap: var(--space-16);
    max-height: calc(100dvh - var(--header-mobile-height) - 48px);
    overflow-y: auto;
    padding: var(--space-8) var(--space-16) var(--space-16);
    background-color: var(--header-bg);
    border: var(--header-border);
    border-radius: var(--header-radius);
    box-shadow: var(--shadow-soft-2);
    opacity: 0;
    translate: 0 -6px;
    transition:
      opacity var(--nav-transition),
      translate var(--nav-transition),
      display var(--nav-transition) allow-discrete;
  }

  .site-header__toggle[aria-expanded="true"] + .site-header__menu {
    display: flex;
    opacity: 1;
    translate: 0 0;

    @starting-style {
      opacity: 0;
      translate: 0 -6px;
    }
  }

  /* The menu is a height-capped flex column that scrolls. Without this,
     flexbox shrinks its children (the CTA first) once content is taller. */
  .site-header__menu > * {
    flex-shrink: 0;
  }

  .site-header__cta {
    justify-self: stretch;
    height: 44px;
  }

  .site-nav {
    justify-self: stretch;

    .site-nav__list {
      flex-direction: column;
      align-items: stretch;
      gap: 0;
    }

    .site-nav__item {
      border-bottom: var(--header-border);
    }

    .site-nav__top-link,
    .site-nav__trigger {
      width: 100%;
      justify-content: space-between;
      padding: 14px 0;
      font-size: var(--font-size-base);
    }

    /* panels expand inline as an accordion */
    .site-nav__panel {
      position: static;
      padding: 0 0 var(--space-16);
      border: 0;
      box-shadow: none;
      background: none;
      translate: 0 -4px;
    }

    .site-nav__trigger[aria-expanded="true"] + .site-nav__panel {
      translate: 0 0;

      @starting-style {
        translate: 0 -4px;
      }
    }

    .site-nav__columns {
      grid-auto-flow: row;
      grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
      gap: var(--space-20) var(--space-16);
    }
  }
}