/**
 * Header Section Styles
 *
 * Fixed transparent-to-solid header with scroll hide/show behavior.
 *
 * @package Anna_Baylis
 * @since   1.0.0
 */

.anna-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 1.35rem 0;
  background: transparent;
  transition:
    min-height 0.35s var(--ease-smooth),
    padding 0.35s var(--ease-smooth),
    background 0.35s var(--ease-smooth),
    box-shadow 0.35s var(--ease-smooth),
    backdrop-filter 0.35s var(--ease-smooth),
    transform 0.4s var(--ease-smooth),
    opacity 0.3s var(--ease-smooth);
  will-change: transform, opacity, background;
}

.anna-header.is-scrolled,
.anna-header:not(.anna-header--transparent) {
  min-height: var(--header-height-scroll);
  padding: 0.8rem 0;
  background: var(--header-bg-scrolled);
  box-shadow: var(--header-shadow-scrolled);
  backdrop-filter: saturate(1.8) blur(20px);
  -webkit-backdrop-filter: saturate(1.8) blur(20px);
}

.anna-header.is-hiding {
  transform: translateY(-100%);
  opacity: 0;
}

.anna-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: var(--space-6);
}

.anna-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.anna-logo__img {
  height: 3.8rem;
  width: auto;
  transition: opacity var(--transition-fast), height 0.35s var(--ease-smooth);
}

.anna-header.is-scrolled .anna-logo__img,
.anna-header:not(.anna-header--transparent) .anna-logo__img {
  height: 3.05rem;
}

.anna-logo:hover .anna-logo__img {
  opacity: 0.85;
}

.anna-logo--text {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-heading);
  letter-spacing: var(--tracking-snug);
  transition: color var(--transition-fast);
}

.anna-logo--text:hover {
  color: var(--color-primary);
}

.anna-header--transparent:not(.is-scrolled) .anna-logo--text {
  color: var(--color-white);
}

.anna-header--transparent:not(.is-scrolled) .anna-logo--text:hover {
  color: rgba(255, 255, 255, 0.84);
}

.anna-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.anna-header--transparent:not(.is-scrolled) .anna-header__actions .anna-btn--primary {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--color-white);
  box-shadow: none;
  backdrop-filter: blur(8px);
}

.anna-header--transparent:not(.is-scrolled) .anna-header__actions .anna-btn--primary:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.72);
}

.anna-header-placeholder {
  height: calc(var(--header-height) + 2.7rem);
  display: block;
}

.anna-is-homepage .anna-header-placeholder {
  display: none;
}

@media (max-width: 768px) {
  .anna-header {
    min-height: 4rem;
    padding: 0.7rem 0;
  }

  .anna-header.is-scrolled,
  .anna-header:not(.anna-header--transparent) {
    min-height: 3.5rem;
    padding: 0.55rem 0;
  }

  .anna-header-placeholder {
    height: 4rem;
  }

  .anna-logo__img {
    height: 2rem;
  }

  .anna-header.is-scrolled .anna-logo__img,
  .anna-header:not(.anna-header--transparent) .anna-logo__img {
    height: 2.75rem;
  }
}