/* ===================================================
   HEADER.CSS — Navigation & Top Bar
   =================================================== */

/* ── Header Wrapper ── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  transition: background 0.4s ease, box-shadow 0.4s ease, padding 0.4s ease;
}
.site-header.scrolled {
  background: rgba(8, 47, 87, 0.97);
  backdrop-filter: blur(20px);
  box-shadow: 0 4px 30px rgba(0,0,0,.25);
}
.site-header.transparent { background: transparent; }

/* ── Nav Inner ── */
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 24px;
}

/* ── Logo ── */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: white;
  box-shadow: 0 4px 16px rgba(5,187,193,.4);
  flex-shrink: 0;
}
.logo-text { display: flex; flex-direction: column; line-height: 1; }
.logo-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--white);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.logo-name span { color: var(--cyan); }
.logo-tagline {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: rgba(255,255,255,.55);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-top: 2px;
}

/* ── Main Nav ── */
.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  position: relative;
  padding: 8px 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255,255,255,.82);
  border-radius: var(--radius-sm);
  transition: color 0.25s, background 0.25s;
  white-space: nowrap;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 14px; right: 14px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transition: transform 0.3s ease;
  border-radius: var(--radius-full);
}
.nav-link:hover,
.nav-link.active { color: var(--cyan); }
.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); }

/* ── Dropdown ── */
.nav-item { position: relative; }
.nav-item:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 10px;
  min-width: 220px;
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  border: 1px solid var(--gray-100);
}
.dropdown::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  border: 8px solid transparent;
  border-bottom-color: var(--white);
  border-top: none;
}
.dropdown a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--gray-700);
  transition: background 0.2s, color 0.2s;
}
.dropdown a:hover {
  background: rgba(5,187,193,.08);
  color: var(--cyan-dark);
}
.dropdown a span { font-size: 1rem; }

/* ── Header CTA ── */
.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.header-phone {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
}
.header-phone .phone-icon {
  width: 34px; height: 34px;
  background: rgba(5,187,193,.2);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

/* ── Hamburger ── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,.1);
}
.hamburger span {
  display: block;
  width: 24px; height: 2.5px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: translateX(-10px); }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ── Mobile Menu ── */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0;
  background: var(--navy-dark);
  padding: 20px;
  border-bottom: 3px solid var(--cyan);
  overflow-y: auto;
  max-height: calc(100vh - var(--header-h));
  transform: translateY(-20px);
  opacity: 0;
  transition: transform 0.35s ease, opacity 0.35s ease;
}
.mobile-menu.open {
  display: block;
  transform: translateY(0);
  opacity: 1;
}
.mobile-nav-link {
  display: block;
  padding: 14px 16px;
  color: rgba(255,255,255,.85);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: color 0.2s, padding-left 0.2s;
}
.mobile-nav-link:hover, .mobile-nav-link.active {
  color: var(--cyan);
  padding-left: 24px;
}
.mobile-nav-sub {
  padding-left: 16px;
  border-left: 2px solid var(--cyan);
  margin: 4px 16px 8px;
}
.mobile-nav-sub a {
  display: block;
  padding: 10px 12px;
  color: rgba(255,255,255,.65);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.mobile-nav-sub a:hover { color: var(--cyan); }
.mobile-menu-cta {
  margin-top: 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.mobile-menu-cta .btn { justify-content: center; padding: 12px 16px; }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .main-nav, .header-phone { display: none; }
  .hamburger { display: flex; }
}
@media (max-width: 480px) {
  .mobile-menu-cta { grid-template-columns: 1fr; }
}