/* ============================================================
   TCP Inter – Header & Navigation
   ============================================================ */

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-outline-var);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 1.5rem;
}

/* ---------- Logo ---------- */
.site-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.site-logo img {
  height: 44px;
  width: auto;
}

/* ---------- Primary Nav ---------- */
.primary-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.primary-nav li {
  list-style: none;
}

.primary-nav a {
  display: block;
  padding: 0.5rem 0.875rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-on-surface);
  border-radius: 0;
  position: relative;
  white-space: nowrap;
  transition: color var(--transition);
}

.primary-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0.875rem;
  right: 0.875rem;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform 0.25s ease;
}

.primary-nav a:hover,
.primary-nav a.current-menu-item {
  background: transparent;
  color: var(--color-primary);
}

.primary-nav a:hover::after,
.primary-nav a.current-menu-item::after {
  transform: scaleX(1);
}

/* ---------- Dropdown ---------- */
.primary-nav .menu-item-has-children {
  position: relative;
}

.primary-nav .menu-item-has-children > a::after {
  content: '';
  position: static;
  display: inline-block;
  width: 0.4em;
  height: 0.4em;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  border-radius: 0;
  background: transparent;
  transform: rotate(45deg) translateY(-0.15em);
  margin-left: 0.4em;
  transition: transform var(--transition);
}

.primary-nav .menu-item-has-children:hover > a::after {
  transform: rotate(-135deg) translateY(-0.15em);
}

.primary-nav .sub-menu {
  display: none;
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  min-width: 200px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-outline-var);
  padding: 0.5rem;
  z-index: 100;
}

.primary-nav .menu-item-has-children:hover .sub-menu {
  display: block;
}

.primary-nav .sub-menu a {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
}

/* ---------- Header CTA ---------- */
.header-cta {
  flex-shrink: 0;
}

/* ---------- Mobile Toggle ---------- */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius);
  transition: background var(--transition);
}

.menu-toggle:hover { background: var(--color-surface-container); }

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-on-surface);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* Hamburger → X */
.menu-toggle.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.is-active span:nth-child(2) { opacity: 0; }
.menu-toggle.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Mobile Nav ---------- */
@media (max-width: 1023px) {
  .primary-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1rem var(--container-px) 1.5rem;
    border-bottom: 1px solid var(--color-outline-var);
    box-shadow: var(--shadow-md);
  }

  .primary-nav.is-open { display: flex; }

  .primary-nav a {
    padding: 0.75rem 1rem;
    font-size: 1rem;
  }

  .primary-nav .sub-menu {
    display: block;
    position: static;
    box-shadow: none;
    border: none;
    background: var(--color-surface-low);
    border-radius: var(--radius);
    margin-top: 0.25rem;
    margin-bottom: 0.25rem;
    padding-left: 1rem;
  }

  .primary-nav .menu-item-has-children > a::after { display: none; }

  .menu-toggle { display: flex; }
  .header-cta  { display: none; }
}

/* ---------- Body offset for fixed header ---------- */
body {
  padding-top: 72px;
}