/* Header — beige surface, pill nav (макет zip) */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  padding-top: env(safe-area-inset-top, 0px);
  border-bottom: 1px solid var(--color-header-border);
  box-shadow: var(--shadow-header);
  transition: box-shadow var(--duration-ui) var(--ease-out);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-header-scrolled);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-sm);
}

.site-header__logo {
  position: relative;
  z-index: 2;
  flex-shrink: 0;
}

.site-nav-panel {
  display: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}

.site-header__cta {
  display: none;
}

.burger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.42);
  border: 1px solid var(--color-header-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  transition: background-color var(--duration-ui) var(--ease-out),
              box-shadow var(--duration-ui) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .burger:hover {
    background: rgba(255, 255, 255, 0.72);
    transform: translateY(-1px);
  }
}

.burger__line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-navy);
  border-radius: 1px;
  transition: transform var(--duration-modal) var(--ease-drawer),
              opacity var(--duration-ui) var(--ease-out),
              background-color var(--duration-ui) var(--ease-out);
}

.burger.is-open {
  background: var(--color-navy);
  border-color: var(--color-navy);
}

.burger.is-open .burger__line {
  background: var(--color-white);
}

.burger.is-open .burger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.burger.is-open .burger__line:nth-child(2) {
  opacity: 0;
}

.burger.is-open .burger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 99;
  padding: calc(var(--header-height) + env(safe-area-inset-top, 0px)) var(--space-lg) var(--space-xl);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-modal) var(--ease-drawer),
              visibility var(--duration-modal) var(--ease-drawer);
}

.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.mobile-nav__link {
  color: var(--color-navy);
  text-decoration: none;
  font-size: var(--font-size-lg);
  font-weight: 600;
  padding: var(--space-md) var(--space-lg);
  min-height: 44px;
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.72);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-soft);
  transform: translateX(-12px);
  opacity: 0;
}

.mobile-nav.is-open .mobile-nav__link {
  transform: translateX(0);
  opacity: 1;
}

.mobile-nav.is-open .mobile-nav__item:nth-child(1) .mobile-nav__link { transition-delay: 40ms; }
.mobile-nav.is-open .mobile-nav__item:nth-child(2) .mobile-nav__link { transition-delay: 70ms; }
.mobile-nav.is-open .mobile-nav__item:nth-child(3) .mobile-nav__link { transition-delay: 100ms; }
.mobile-nav.is-open .mobile-nav__item:nth-child(4) .mobile-nav__link { transition-delay: 130ms; }
.mobile-nav.is-open .mobile-nav__item:nth-child(5) .mobile-nav__link { transition-delay: 160ms; }
.mobile-nav.is-open .mobile-nav__item:nth-child(6) .mobile-nav__link { transition-delay: 190ms; }
.mobile-nav.is-open .mobile-nav__item:nth-child(7) .mobile-nav__link { transition-delay: 220ms; }

.mobile-nav__link--cta {
  margin-top: var(--space-sm);
}

@media (min-width: 768px) {
  .site-header {
    height: var(--header-height-desktop);
  }

  .site-header__inner {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    height: var(--header-height-desktop);
    gap: var(--space-md);
  }

  .site-nav-panel {
    display: flex;
    justify-content: center;
    justify-self: center;
    width: fit-content;
    max-width: 100%;
    padding: var(--nav-panel-pad);
    background: var(--color-nav-panel-bg);
    border: 1px solid var(--color-nav-panel-border);
    border-radius: var(--radius-pill);
    box-shadow: 0 2px 8px rgba(31, 74, 115, 0.08);
  }

  .site-nav {
    display: inline-flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: var(--nav-link-gap);
  }

  .site-header__cta {
    display: inline-flex;
    justify-self: end;
    z-index: 2;
    flex-shrink: 0;
  }

  .site-header__logo {
    z-index: 2;
    justify-self: start;
  }

  .burger {
    display: none;
  }
}

@media (min-width: 1280px) {
  .site-nav-panel {
    padding: var(--nav-panel-pad-desktop);
  }

  .site-nav {
    gap: var(--nav-link-gap-desktop);
  }
}

@media (prefers-reduced-motion: reduce) {
  .mobile-nav__link {
    transform: none;
    opacity: 1;
    transition-delay: 0ms;
  }

  .burger:hover {
    transform: none;
  }
}