/**
 * Header & Navigation Styles
 *
 * @package PlainFig
 */

.pf-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--pf-border);
  transition: padding var(--transition-base), box-shadow var(--transition-base), min-height var(--transition-base);
}

.pf-header.is-scrolled {
  box-shadow: var(--shadow-sm);
}

.pf-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  transition: min-height var(--transition-base);
}

.pf-header.is-scrolled .pf-header-inner {
  min-height: 52px;
}

.pf-brand {
  display: flex;
  align-items: center;
}

.pf-logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.pf-logo-img {
  height: 36px;
  width: auto;
  display: block;
  transition: height var(--transition-base);
}

.pf-header.is-scrolled .pf-logo-img {
  height: 30px;
}

/* -------------------------------------------------------------
 * Desktop Navigation
 * ------------------------------------------------------------- */
.pf-nav {
  display: flex;
  align-items: center;
}

.pf-nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-6);
}

.pf-nav-menu li {
  margin: 0;
}

.pf-nav-menu a {
  color: var(--pf-navy);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.pf-nav-menu a:hover {
  color: var(--pf-green);
  text-decoration: none;
}

.pf-nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--pf-green);
  transition: width var(--transition-fast);
}

.pf-nav-menu a:hover::after {
  width: 100%;
}

/* -------------------------------------------------------------
 * Mobile Hamburger Toggle Button
 * ------------------------------------------------------------- */
.pf-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 40px;
  height: 40px;
  padding: 10px 8px;
  background: transparent;
  border: 1px solid var(--pf-border);
  border-radius: var(--radius-md);
  cursor: pointer;
}

.pf-nav-toggle:focus-visible {
  box-shadow: var(--shadow-focus);
}

.pf-nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--pf-navy);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* Mobile Responsive Drawer (< 768px) */
@media (max-width: 767px) {
  .pf-nav-toggle {
    display: flex;
  }

  .pf-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    border-bottom: 1px solid var(--pf-border);
    box-shadow: var(--shadow-hover);
    padding: var(--space-4) var(--space-6);
  }

  .pf-nav.is-open {
    display: block;
  }

  .pf-nav-menu {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .pf-nav-menu a {
    display: block;
    width: 100%;
    font-size: var(--text-base);
    padding: var(--space-2) 0;
  }
}