/* ============================================
   HEADER & NAVIGATION
   ============================================ */

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header.transparent {
  background: transparent;
}

.header.scrolled {
  background: #f5f5f5;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

/* Non-home pages: solid from start */
.header.solid {
  background: #f5f5f5;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

/* Logo */
.logo {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header.transparent:not(.scrolled) .logo {
  color: #fff;
}

.logo-icon {
  width: 32px;
  height: 32px;
  object-fit: contain;
  display: block;
}

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links a {
  color: var(--primary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
  opacity: 0.7;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  opacity: 1;
}

/* Transparent header (hero): white links until scrolled */
.header.transparent:not(.scrolled) .nav-links a {
  color: rgba(255,255,255,0.85);
  opacity: 1;
}

.header.transparent:not(.scrolled) .nav-links a:hover,
.header.transparent:not(.scrolled) .nav-links a.active {
  color: #fff;
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.nav-cta {
  margin-left: var(--space-md);
}

.nav-cta .btn {
  padding: 0.5rem 1.25rem;
  font-size: var(--font-size-sm);
}

/* ─── Hamburger ─── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
  background: none;
  border: none;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
  display: block;
}

/* Transparent header: white hamburger */
.header.transparent:not(.scrolled) .hamburger span {
  background: #fff;
}

.hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu open: hamburger stays primary */
.hamburger.open span {
  background: var(--primary);
}

/* ─── Mobile Menu ─── */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(248, 249, 250, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-menu.open {
  display: flex;
  opacity: 1;
}

.mobile-menu a {
  color: var(--primary);
  font-size: var(--font-size-xl);
  font-weight: 600;
  transition: all var(--transition-fast);
  padding: 14px 40px;
  border-radius: var(--radius-lg);
  display: block;
  text-align: center;
  width: 80%;
  max-width: 320px;
  position: relative;
}

.mobile-menu a:hover,
.mobile-menu a:active {
  background: rgba(33, 50, 94, 0.06);
  color: var(--accent-dark);
}

/* Active page indicator in mobile menu */
.mobile-menu a.active {
  color: var(--accent-dark);
  font-weight: 700;
}

.mobile-menu a.active::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 20px;
  background: var(--accent);
  border-radius: 2px;
}

/* CTA button in mobile menu */
.mobile-menu .btn {
  margin-top: var(--space-lg);
  width: 80%;
  max-width: 320px;
  text-align: center;
  font-size: var(--font-size-base);
  padding: 14px;
}

/* ─── Tablet: show hamburger ─── */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links,
  .nav-cta {
    display: none;
  }
}

/* ─── Mobile: smaller header ─── */
@media (max-width: 480px) {
  .header {
    height: 60px;
  }

  .logo {
    font-size: var(--font-size-lg);
  }

  .logo-icon {
    width: 26px;
    height: 26px;
  }

  .mobile-menu a {
    font-size: var(--font-size-lg);
    padding: 12px 32px;
  }

  .mobile-menu .btn {
    font-size: var(--font-size-sm);
    padding: 12px;
  }
}

/* ─── Very small: tighter menu ─── */
@media (max-width: 360px) {
  .mobile-menu a {
    font-size: var(--font-size-base);
    padding: 10px 24px;
  }
}