/* ==========================================================================
   FINDABILITY — Header
   Fixed transparent → frosted on scroll → hide on scroll down
   ========================================================================== */

.fb-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: background 0.3s, box-shadow 0.3s, padding 0.3s, transform 0.3s;
}

/* Frosted glass on scroll */
.fb-header.fb-header--scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
  padding: 10px 0;
}

/* Hidden on scroll down */
.fb-header.fb-header--hidden {
  transform: translateY(-100%);
}

.fb-header__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.fb-header__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.fb-header__logo img {
  height: 28px;
  width: auto;
}
.fb-header__logo-scrolled { display: none; }
.fb-header.fb-header--scrolled .fb-header__logo-default { display: none; }
.fb-header.fb-header--scrolled .fb-header__logo-scrolled { display: block; }

/* Nav */
.fb-header__center {
  flex: 1;
  display: flex;
  justify-content: center;
}
.fb-header__nav {
  display: flex;
  gap: 32px;
}
.fb-header__nav-link {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.9);
  transition: color 0.2s;
  white-space: nowrap;
}
.fb-header__nav-link:hover {
  color: var(--white);
}
.fb-header__nav-link--active {
  color: var(--white);
}
.fb-header.fb-header--scrolled .fb-header__nav-link {
  color: var(--neutral-700);
}
.fb-header.fb-header--scrolled .fb-header__nav-link:hover,
.fb-header.fb-header--scrolled .fb-header__nav-link--active {
  color: var(--blue);
}

/* Actions */
.fb-header__actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.fb-header__cta {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 10px 24px;
  background: var(--gold);
  color: var(--white);
  border-radius: var(--radius-sm);
  transition: background 0.2s, transform 0.2s;
}
.fb-header__cta:hover {
  background: var(--gold-dark);
  color: var(--white);
  transform: translateY(-1px);
}

/* Hamburger */
.fb-header__hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  width: 40px;
  height: 40px;
}
.fb-header__hamburger svg {
  width: 100%;
  height: 100%;
  stroke: var(--white);
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.fb-header.fb-header--scrolled .fb-header__hamburger svg {
  stroke: var(--neutral-800);
}

/* Hamburger lines → X animation */
.fb-ham-line {
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
  transform-origin: center;
}
.fb-header__hamburger.fb-header__hamburger--active .fb-ham-top {
  transform: translateY(6px) rotate(45deg);
}
.fb-header__hamburger.fb-header__hamburger--active .fb-ham-mid {
  opacity: 0;
}
.fb-header__hamburger.fb-header__hamburger--active .fb-ham-bot {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---- Mobile Menu Overlay ---- */
.fb-mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 999;
  background: var(--neutral-900);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.fb-mobile-menu.fb-mobile-menu--open {
  opacity: 1;
  pointer-events: auto;
}

.fb-mobile-menu__nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}
.fb-mobile-menu__link {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--white);
  transition: color 0.2s;
}
.fb-mobile-menu__link:hover,
.fb-mobile-menu__link--active { color: var(--gold); }

.fb-mobile-menu__cta {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  padding: 14px 32px;
  background: var(--gold);
  color: var(--white);
  border-radius: var(--radius-sm);
  margin-top: 16px;
  transition: background 0.2s;
}
.fb-mobile-menu__cta:hover {
  background: var(--gold-dark);
  color: var(--white);
}

/* ---- Responsive ---- */
@media (max-width: 991px) {
  .fb-header__center { display: none; }
  .fb-header__cta { display: none; }
  .fb-header__hamburger { display: block; }
}