/* ============================================
   RANK BOOSTER — Header & Navigation (E-E-A-T)
   ============================================ */

/* ── Skip link (accessibility) ── */
.rb-skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: 10000;
  padding: 12px 24px;
  background: var(--color-primary);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.rb-skip-link:focus {
  position: fixed;
  left: 12px;
  top: 0;
  width: auto;
  height: auto;
}

/* ── Top Bar — Trust signals ── */
.rb-topbar {
  background: var(--color-navy);
  color: rgba(255,255,255,0.8);
  font-size: var(--font-size-xs);
  height: 36px;
  display: flex;
  align-items: center;
  position: relative;
  z-index: 1001;
  transition: all 0.3s ease;
}

.rb-topbar__inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.rb-topbar__left {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.rb-topbar__item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.rb-topbar__item:hover {
  color: #fff;
}

.rb-topbar__item svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.rb-topbar__trust {
  font-weight: var(--font-weight-medium);
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.02em;
}

.rb-topbar.is-hidden {
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
}

@media (max-width: 768px) {
  .rb-topbar {
    display: none;
  }
}

/* ── Main Header ── */
.rb-header {
  position: fixed;
  top: 36px;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all var(--transition-base);
}

.rb-header.is-scrolled {
  top: 0;
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.98);
}

.rb-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* ── Logo ── */
.rb-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  flex-shrink: 0;
}

.rb-logo__icon {
  height: 40px;
  width: auto;
  object-fit: contain;
  transition: opacity 0.3s ease;
}

.rb-logo:hover .rb-logo__icon {
  opacity: 0.85;
}

.rb-logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.rb-logo__name {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-extra);
  color: var(--color-primary);
  letter-spacing: 0.04em;
}

.rb-logo__tagline {
  font-size: 0.625rem;
  color: var(--color-gray-400);
  font-weight: var(--font-weight-normal);
  margin-top: 2px;
  letter-spacing: 0.02em;
}

@media (max-width: 768px) {
  .rb-logo__tagline {
    display: none;
  }
  .rb-logo__name {
    font-size: var(--font-size-sm);
  }
}

/* ── Desktop Nav ── */
.rb-nav {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  list-style: none;
  padding: 0;
  margin: 0;
}

.rb-nav__item {
  position: relative;
}

.rb-nav__link {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 1rem;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.rb-nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 1rem;
  right: 1rem;
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.rb-nav__link:hover,
.rb-nav__link--active {
  color: var(--color-primary);
}

.rb-nav__link:hover::after,
.rb-nav__link--active::after {
  transform: scaleX(1);
}

/* Dropdown arrow */
.rb-nav__link .rb-nav__arrow {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-fast);
}

.rb-nav__item:hover .rb-nav__arrow {
  transform: rotate(180deg);
}

/* ── Dropdown ── */
.rb-nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  padding: var(--space-sm) 0;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-base);
  border: 1px solid var(--color-gray-100);
  list-style: none;
}

.rb-nav__dropdown ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.rb-nav__item:hover .rb-nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.rb-nav__dropdown-link {
  display: block;
  padding: 0.625rem 1.25rem;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-600);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.rb-nav__dropdown-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* ── CTA Button ── */
.rb-header__cta {
  margin-left: var(--space-lg);
}

/* ── Mobile contact (hidden on desktop) ── */
.rb-header__mobile-contact {
  display: none;
}

.rb-header__mobile-phone {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semi);
  color: var(--color-primary);
  text-decoration: none;
  padding: var(--space-sm) 0;
}

.rb-header__mobile-phone svg {
  width: 18px;
  height: 18px;
}

/* ── Mobile toggle ── */
.rb-nav-toggle {
  display: none;
  width: 32px;
  height: 32px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
}

.rb-nav-toggle__bar {
  width: 24px;
  height: 2px;
  background: var(--color-navy);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.rb-nav-toggle.is-active .rb-nav-toggle__bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.rb-nav-toggle.is-active .rb-nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.rb-nav-toggle.is-active .rb-nav-toggle__bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Mobile Navigation ── */
@media (max-width: 1024px) {
  .rb-header {
    top: 0;
  }

  .rb-nav-toggle {
    display: flex;
  }

  .rb-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    flex-direction: column;
    align-items: stretch;
    padding: calc(var(--header-height) + var(--space-xl)) var(--space-xl) var(--space-xl);
    background: var(--color-white);
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-smooth);
    overflow-y: auto;
    gap: 0;
  }

  .rb-nav.is-open {
    right: 0;
  }

  .rb-nav__link {
    padding: 0.75rem 0;
    font-size: var(--font-size-base);
  }

  .rb-nav__link::after {
    display: none;
  }

  .rb-nav__dropdown {
    position: static;
    box-shadow: none;
    border: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    padding-left: var(--space-md);
    display: none;
  }

  .rb-nav__item.is-open .rb-nav__dropdown {
    display: block;
  }

  .rb-header__mobile-contact {
    display: block;
    border-top: 1px solid var(--color-gray-100);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
  }

  .rb-header__cta {
    margin-left: 0;
    margin-top: var(--space-lg);
  }

  .rb-header__cta .rb-btn {
    width: 100%;
    text-align: center;
  }
}

/* ── Mobile overlay ── */
.rb-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(var(--color-navy-rgb), 0.5);
  z-index: 999;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.rb-nav-overlay.is-active {
  display: block;
  opacity: 1;
}