/* ==========================================================================
   Kick of R&D — Header & Navigation
   ========================================================================== */


/* ── Sticky Header ──────────────────────────────────────────────────────── */
.krd-header {
  position: sticky;
  top: 0;
  z-index: var(--krd-z-nav);
  background-color: var(--krd-bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--krd-border);
}

.krd-header__inner {
  display: flex;
  align-items: center;
  gap: var(--krd-space-sm);
  max-width: var(--krd-max-width);
  margin: 0 auto;
  padding: 0.75rem var(--krd-gutter);
}


/* ── Logo ───────────────────────────────────────────────────────────────── */
.krd-header__logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  flex-shrink: 0;
}

.krd-header__logo img {
  width: 36px;
  height: auto;
}

.krd-header__wordmark {
  font-family: var(--krd-font-display);
  font-size: 1.125rem;
  font-weight: var(--krd-fw-medium);
  color: var(--krd-text-primary);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.krd-header__wordmark strong {
  color: var(--krd-orange);
  font-weight: var(--krd-fw-bold);
}


/* ── Desktop Nav ────────────────────────────────────────────────────────── */
.krd-header__nav {
  display: none;
  margin-left: auto;
}

.krd-nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.krd-nav-list li a {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.875rem;
  font-size: var(--krd-fs-small);
  font-weight: var(--krd-fw-medium);
  color: var(--krd-text-secondary);
  text-decoration: none;
  border-radius: var(--krd-radius-sm);
  transition:
    color var(--krd-duration-fast) var(--krd-ease-out),
    background-color var(--krd-duration-fast) var(--krd-ease-out);
}

.krd-nav-list li a:hover,
.krd-nav-list li.current-menu-item > a,
.krd-nav-list li.current_page_item > a {
  color: var(--krd-text-primary);
  background-color: var(--krd-bg-tertiary);
}


/* ── Header CTA ─────────────────────────────────────────────────────────── */
.krd-header__cta {
  display: none;
  margin-left: var(--krd-space-sm);
  padding: 0.625rem 1.25rem;
  font-size: var(--krd-fs-small);
  min-height: 40px;
}


/* ── Mobile Toggle (Hamburger) ──────────────────────────────────────────── */
.krd-header__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.krd-header__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--krd-text-primary);
  border-radius: 1px;
  transition:
    transform var(--krd-duration-normal) var(--krd-ease-out),
    opacity var(--krd-duration-fast);
}

/* Hamburger → X transform when open */
.krd-header__toggle[aria-expanded="true"] .krd-header__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.krd-header__toggle[aria-expanded="true"] .krd-header__toggle-bar:nth-child(2) {
  opacity: 0;
}
.krd-header__toggle[aria-expanded="true"] .krd-header__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}


/* ── Mobile Nav Drawer ──────────────────────────────────────────────────── */
.krd-mobile-nav {
  position: fixed;
  inset: 0;
  z-index: calc(var(--krd-z-nav) - 1);
  background-color: var(--krd-bg-primary);
  padding-top: 72px; /* below header */
  transform: translateX(100%);
  transition: transform var(--krd-duration-normal) var(--krd-ease-out);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.krd-mobile-nav[aria-hidden="false"] {
  transform: translateX(0);
}

.krd-mobile-nav__inner {
  display: flex;
  flex-direction: column;
  padding: var(--krd-space-lg) var(--krd-gutter);
  gap: var(--krd-space-xs);
}

.krd-mobile-nav-list {
  list-style: none;
}

.krd-mobile-nav-list li a {
  display: flex;
  align-items: center;
  padding: 0.875rem 0;
  font-family: var(--krd-font-display);
  font-size: 1.25rem;
  font-weight: var(--krd-fw-semibold);
  color: var(--krd-text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--krd-border);
  transition: color var(--krd-duration-fast) var(--krd-ease-out);
}

.krd-mobile-nav-list li a:hover,
.krd-mobile-nav-list li.current-menu-item > a {
  color: var(--krd-orange);
}

.krd-mobile-nav__cta {
  margin-top: var(--krd-space-md);
  text-align: center;
}

/* Body scroll lock when mobile nav is open */
body.krd-nav-open {
  overflow: hidden;
}


/* ==========================================================================
   ── DESKTOP (768px+): show nav, hide toggle
   ========================================================================== */
@media (min-width: 768px) {
  .krd-header__nav {
    display: block;
  }

  .krd-header__cta {
    display: inline-flex;
  }

  .krd-header__toggle {
    display: none;
  }

  .krd-mobile-nav {
    display: none;
  }
}