/* Header-specific styles building on base.css */

.vlt-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.9);
}

.vlt-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: 0.75rem;
}

/* Logo */
.vlt-header__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.vlt-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 20%, rgba(74, 144, 226, 0.45), transparent 55%),
              linear-gradient(135deg, #ffffff, #f1eee9);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.vlt-header__logo-text {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: var(--font-size-sm);
}

/* Navigation */
.vlt-header__nav {
  display: flex;
  align-items: center;
}

.vlt-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
}

.vlt-header__nav-link {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
  padding-block: 0.5rem;
}

.vlt-header__nav-link:hover,
.vlt-header__nav-link:focus-visible {
  color: var(--color-text);
}

.vlt-header__nav-item--cta {
  margin-left: var(--space-2);
}

.vlt-header__nav-cta {
  font-size: var(--font-size-xs);
  padding-inline: 1.3rem;
  padding-block: 0.55rem;
}

/* Mobile toggle */
.vlt-header__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--gray-200);
  background-color: #ffffff;
  cursor: pointer;
  padding: 8px 10px;
}

.vlt-header__toggle-bar {
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-700);
  transition: transform var(--transition-base), opacity var(--transition-base),
    background-color var(--transition-base);
}

/* Default: mobile nav hidden via CSS; JS enhances with classes */
@media (max-width: 767px) {
  .vlt-header__nav {
    position: fixed;
    inset: 64px 0 auto 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--gray-200);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base),
      visibility var(--transition-base);
  }

  .vlt-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--container-padding-x) var(--space-5);
    gap: var(--space-3);
  }

  .vlt-header__nav-item--cta {
    width: 100%;
    margin-left: 0;
    margin-top: var(--space-2);
  }

  .vlt-header__nav-cta {
    width: 100%;
    justify-content: center;
  }

  .vlt-header__toggle {
    display: inline-flex;
  }

  .vlt-header--nav-open .vlt-header__nav {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .vlt-header--nav-open .vlt-header__toggle-bar:nth-child(1) {
    transform: translateY(3px) rotate(45deg);
  }

  .vlt-header--nav-open .vlt-header__toggle-bar:nth-child(2) {
    opacity: 0;
  }

  .vlt-header--nav-open .vlt-header__toggle-bar:nth-child(3) {
    transform: translateY(-3px) rotate(-45deg);
  }
}

@media (min-width: 768px) {
  .vlt-header__toggle {
    display: none;
  }

  .vlt-header__nav {
    position: static;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
  }

  .vlt-header__nav-list {
    padding: 0;
  }
}

/* Utility: hide overflow under open mobile nav to prevent background scroll (toggled via JS on body) */
.body--nav-open {
  overflow: hidden;
}