/*
 * header.css — Sticky site header chrome.
 * Layout: [wordmark] [centered nav] [login + CTA button]
 * Dark glass background (bg-elevated at ~90% + backdrop-blur).
 */

/* ============================================================
   Outer wrapper — sticky, dark glass
   ============================================================ */
.bit-header {
  position: sticky;
  top: 0;
  z-index: 100;
  /* bg-elevated #14151F at 90% opacity gives the glass effect */
  background-color: rgba(20, 21, 31, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--wp--preset--color--white-10);
}

/* ============================================================
   Inner container — constrained flex row
   ============================================================ */
.bit-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--wp--style--global--content-size); /* 1200px */
  margin-inline: auto;
  padding-inline: var(--wp--preset--spacing--space-xl); /* 32px */
  height: 64px;
  gap: var(--wp--preset--spacing--space-xl); /* 32px */
}

/* ============================================================
   Wordmark — "Backstage" (white) + "IT" (accent-gold)
   The logo icon (golden chevron/bolt) is a future SVG asset;
   a TODO comment marks where the ::before background-image goes.
   ============================================================ */
.bit-wordmark {
  flex-shrink: 0;
  margin: 0;
  line-height: 1;
}

.bit-wordmark a {
  display: inline-flex;
  align-items: center;
  gap: 0.0625rem;
  color: var(--wp--preset--color--white);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem; /* 20px — matches Figma wordmark size */
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.bit-wordmark a:hover {
  text-decoration: none;
  color: var(--wp--preset--color--white);
}

/* "IT" portion rendered in accent gold */
.bit-wordmark__it {
  color: var(--wp--preset--color--accent-gold);
}

/* ============================================================
   Navigation — centered, white links, hover to gold
   Targets the core/navigation block's rendered output classes.
   ============================================================ */
.bit-nav {
  flex: 1;
  display: flex;
  justify-content: center;
  /* Prevent the nav block from adding unwanted overflow */
  min-width: 0;
}

/* Main nav list */
.bit-nav .wp-block-navigation__container {
  display: flex;
  align-items: center;
  gap: var(--wp--preset--spacing--space-xl); /* 32px between links */
  list-style: none;
  margin: 0;
  padding: 0;
}

/* Individual nav links */
.bit-nav .wp-block-navigation-item__content {
  color: var(--wp--preset--color--white);
  font-size: var(--wp--preset--font-size--body); /* 16px */
  font-weight: 400;
  text-decoration: none;
  padding-block: 0.25rem;
  transition: color 0.2s ease;
}

.bit-nav .wp-block-navigation-item__content:hover,
.bit-nav .current-menu-item .wp-block-navigation-item__content {
  color: var(--wp--preset--color--accent-gold);
  text-decoration: none;
}

/* ============================================================
   CTA group — login link + header button
   ============================================================ */
.bit-header__ctas {
  display: flex;
  align-items: center;
  gap: var(--wp--preset--spacing--space-md); /* 16px */
  flex-shrink: 0;
}

/* Login: muted flat link */
.bit-header__login {
  margin: 0;
}

.bit-header__login a {
  color: var(--wp--preset--color--white-40);
  font-size: var(--wp--preset--font-size--body-sm); /* 14px */
  font-weight: 400;
  text-decoration: none;
  transition: color 0.2s ease;
}

.bit-header__login a:hover {
  color: var(--wp--preset--color--white);
  text-decoration: none;
}

/* Header-specific button override: dark glass fill + gold border + white text.
   The footer uses the canonical gold-fill variant from base.css.
   On hover, the gold border becomes a gold fill to reward interaction. */
.bit-header .bit-btn--gold .wp-block-button__link {
  background-color: var(--wp--preset--color--bg-elevated); /* #14151F */
  border-color: var(--wp--preset--color--accent-gold);
  color: var(--wp--preset--color--white);
}

.bit-header .bit-btn--gold .wp-block-button__link:hover {
  background-color: var(--wp--preset--color--accent-gold);
  border-color: var(--wp--preset--color--accent-gold);
  color: var(--wp--preset--color--bg-elevated);
  text-decoration: none;
}

/* ============================================================
   Mobile (≤ 781px) — hamburger + full-screen overlay
   The core/navigation block with overlayMenu:"mobile" renders
   the hamburger button and overlay container automatically.
   ============================================================ */
@media (max-width: 781px) {
  .bit-header__inner {
    padding-inline: var(--wp--preset--spacing--space-lg); /* 24px */
    height: 56px;
  }

  /* Desktop CTAs hidden on mobile; overlay provides equivalent access */
  .bit-header__ctas {
    display: none;
  }

  /* Hamburger button */
  .bit-header .wp-block-navigation__responsive-container-open {
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--wp--preset--color--white);
    cursor: pointer;
    padding: var(--wp--preset--spacing--space-xs);
    line-height: 1;
  }

  .bit-header .wp-block-navigation__responsive-container-open svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
  }

  /* Full-screen overlay when open */
  .bit-header .wp-block-navigation__responsive-container.is-menu-open {
    background-color: var(--wp--preset--color--bg-elevated); /* #14151F */
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }

  /* Overlay nav list: stacked, centered */
  .bit-header .wp-block-navigation__responsive-container .wp-block-navigation__container {
    flex-direction: column;
    align-items: center;
    gap: var(--wp--preset--spacing--space-xl); /* 32px */
  }

  /* Overlay link size */
  .bit-header .wp-block-navigation__responsive-container .wp-block-navigation-item__content {
    font-size: var(--wp--preset--font-size--h3); /* 24px */
    font-weight: 500;
    color: var(--wp--preset--color--white);
  }

  .bit-header .wp-block-navigation__responsive-container .wp-block-navigation-item__content:hover {
    color: var(--wp--preset--color--accent-gold);
  }

  /* Close (X) button — top-right of the overlay */
  .bit-header .wp-block-navigation__responsive-container-close {
    position: absolute;
    top: var(--wp--preset--spacing--space-lg); /* 24px */
    right: var(--wp--preset--spacing--space-lg);
    background: none;
    border: none;
    color: var(--wp--preset--color--white);
    cursor: pointer;
    padding: var(--wp--preset--spacing--space-xs);
    line-height: 1;
  }
}

/* ============================================================
   Touch fallback — no hover support (coarse pointer)
   Nav links show a static gold underline to signal the active
   item without requiring hover interaction.
   ============================================================ */
@media (pointer: coarse) {
  .bit-nav .wp-block-navigation-item__content {
    padding-block: 0.5rem;
  }
}