/* ============================================
   HEADER.CSS — Premium glassmorphism header
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: background var(--transition-slow), backdrop-filter var(--transition-slow), box-shadow var(--transition-slow);
  background: transparent;
}

/* Scrolled state — glassmorphism */
.header--scrolled {
  background: rgba(11, 31, 58, 0.9);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 rgba(255,255,255,0.05), 0 8px 32px rgba(0,0,0,0.25);
}

/* ── Container ── */
.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

/* ── Logo ── */
.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.header__logo-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 8px rgba(245,158,11,0.2));
  transition: filter var(--transition-base), transform var(--transition-base);
}

.header__logo:hover .header__logo-icon {
  filter: drop-shadow(0 4px 16px rgba(245,158,11,0.4));
  transform: scale(1.04);
}

.header__logo-text {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: var(--fw-bold);
  color: var(--color-white);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.header__logo-accent {
  color: var(--color-amber);
}

/* ── Navigation ── */
.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin-left: auto;
}

.header__menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.header__menu-link {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  letter-spacing: 0.01em;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  position: relative;
}

.header__menu-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: var(--space-3);
  right: var(--space-3);
  height: 1px;
  background: var(--color-amber);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-base);
}

.header__menu-link:hover {
  color: var(--color-white);
  background: rgba(255,255,255,0.06);
}

.header__menu-link:hover::after {
  transform: scaleX(1);
}

/* ── CTA button ── */
.header__cta {
  font-size: var(--fs-sm);
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-md);
  gap: var(--space-2);
}

/* ── Overlay ── */
.header__overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 99;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.header__overlay--visible {
  opacity: 1;
}

/* ── Hamburger ── */
.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
  transition: background var(--transition-fast);
  z-index: 100;
}

.header__hamburger:hover {
  background: rgba(255,255,255,0.12);
}

.header__hamburger-line {
  display: block;
  width: 20px;
  height: 1.5px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

/* Active (X) state */
.header__hamburger--active .header__hamburger-line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.header__hamburger--active .header__hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.header__hamburger--active .header__hamburger-line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}


/* ── Mobile ── */
@media (max-width: 900px) {
  .header__hamburger {
    display: flex;
  }

  .header__overlay {
    display: block;
  }

  .header__nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(320px, 90vw);
    height: 100vh;
    background: var(--color-navy);
    border-left: 1px solid rgba(255,255,255,0.07);
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: var(--space-4);
    padding: var(--space-24) var(--space-8);
    z-index: 100;
    transition: right var(--transition-slow);
    overflow-y: auto;
  }

  .header__nav--open {
    right: 0;
  }

  .header__menu {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
  }

  .header__menu-link {
    font-size: var(--fs-md);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
  }

  .header__cta {
    width: 100%;
    justify-content: center;
    margin-top: var(--space-4);
    padding: 0.875rem 1.25rem;
    font-size: var(--fs-base);
  }
}