/**
 * PURIVOM — HEADER
 * Structural foundation only. Final visual polish arrives in a later phase.
 */

.pv-header {
  position: sticky;
  top: 0;
  z-index: var(--pv-z-header);
  width: 100%;
  height: var(--pv-header-height);
  display: flex;
  align-items: center;
  background-color: rgba(10, 10, 10, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: var(--pv-border-width) solid transparent;
  transition: height var(--pv-duration-base) var(--pv-ease-standard),
              border-color var(--pv-duration-base) var(--pv-ease-standard),
              background-color var(--pv-duration-base) var(--pv-ease-standard);
}

.pv-header.is-scrolled {
  height: var(--pv-header-height-scrolled);
  border-bottom-color: var(--pv-border-default);
  background-color: rgba(10, 10, 10, 0.92);
}

/* On the front page, let the cinematic hero show through the header
   until the visitor scrolls, then solidify for legibility over content. */
.pv-template-front .pv-header:not(.is-scrolled) {
  background-color: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom-color: transparent;
}

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

.pv-header__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.pv-header__logo img,
.pv-header__logo svg {
  height: 34px;
  width: auto;
  transition: height var(--pv-duration-base) var(--pv-ease-standard);
}

.pv-header.is-scrolled .pv-header__logo img,
.pv-header.is-scrolled .pv-header__logo svg {
  height: 28px;
}

.pv-header__logo-text {
  font-family: var(--pv-font-display);
  font-size: 1.5rem;
  letter-spacing: var(--pv-tracking-wide);
  color: var(--pv-text-primary);
}

/* ---------------------------------------------------------------------
   PRIMARY NAVIGATION (desktop)
   --------------------------------------------------------------------- */

.pv-nav-primary {
  display: none;
}

@media (min-width: 992px) {
  .pv-nav-primary {
    display: flex;
  }
}

.pv-nav-primary__list {
  display: flex;
  align-items: center;
  gap: var(--pv-space-lg);
}

.pv-nav-link {
  position: relative;
  font-size: var(--pv-text-nav);
  font-weight: var(--pv-weight-medium);
  color: var(--pv-text-primary);
  padding: 0.4em 0;
}

.pv-nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background-color: var(--pv-accent);
  transition: width var(--pv-duration-base) var(--pv-ease-standard);
}

.pv-nav-link:hover::after,
.pv-nav-link[aria-current="page"]::after {
  width: 100%;
}

.pv-nav-link[aria-current="page"] {
  color: var(--pv-text-accent);
}

.pv-header__actions {
  display: flex;
  align-items: center;
  gap: var(--pv-space-md);
}

.pv-header__cta {
  display: none;
}

@media (min-width: 992px) {
  .pv-header__cta {
    display: inline-flex;
  }
}

/* ---------------------------------------------------------------------
   MOBILE MENU TOGGLE
   --------------------------------------------------------------------- */

.pv-menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--pv-radius-sm);
}

@media (min-width: 992px) {
  .pv-menu-toggle {
    display: none;
  }
}

.pv-menu-toggle__bars {
  position: relative;
  width: 22px;
  height: 16px;
}

.pv-menu-toggle__bars span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background-color: var(--pv-text-primary);
  transition: transform var(--pv-duration-base) var(--pv-ease-standard),
              opacity var(--pv-duration-base) var(--pv-ease-standard),
              top var(--pv-duration-base) var(--pv-ease-standard);
}

.pv-menu-toggle__bars span:nth-child(1) { top: 0; }
.pv-menu-toggle__bars span:nth-child(2) { top: 7px; }
.pv-menu-toggle__bars span:nth-child(3) { top: 14px; }

.pv-menu-toggle[aria-expanded="true"] .pv-menu-toggle__bars span:nth-child(1) {
  top: 7px;
  transform: rotate(45deg);
}

.pv-menu-toggle[aria-expanded="true"] .pv-menu-toggle__bars span:nth-child(2) {
  opacity: 0;
}

.pv-menu-toggle[aria-expanded="true"] .pv-menu-toggle__bars span:nth-child(3) {
  top: 7px;
  transform: rotate(-45deg);
}

/* ---------------------------------------------------------------------
   MOBILE NAVIGATION PANEL
   --------------------------------------------------------------------- */

.pv-nav-mobile {
  position: fixed;
  inset: 0;
  top: var(--pv-header-height);
  z-index: calc(var(--pv-z-header) - 1);
  background-color: var(--pv-color-obsidian);
  padding: var(--pv-space-xl) var(--pv-container-gutter);
  overflow-y: auto;
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--pv-duration-base) var(--pv-ease-standard),
              transform var(--pv-duration-base) var(--pv-ease-standard),
              visibility 0s linear var(--pv-duration-base);
}

@media (min-width: 992px) {
  .pv-nav-mobile {
    display: none;
  }
}

.pv-nav-mobile.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity var(--pv-duration-base) var(--pv-ease-standard),
              transform var(--pv-duration-base) var(--pv-ease-standard),
              visibility 0s linear 0s;
}

.pv-nav-mobile__list {
  display: flex;
  flex-direction: column;
  gap: var(--pv-space-md);
}

.pv-nav-mobile__list .pv-nav-link {
  font-family: var(--pv-font-display);
  font-size: var(--pv-text-h3);
  font-weight: var(--pv-weight-medium);
}

.pv-nav-mobile__cta {
  margin-top: var(--pv-space-xl);
}

body.pv-menu-open {
  overflow: hidden;
}

@media (prefers-reduced-motion: reduce) {
  .pv-nav-mobile {
    transition: none;
  }
}