/* ==========================================================================
   Header & Mobile Menu Styles (НИИЭФА)
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header, 1005);
  background-color: var(--color-primary, #003274);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  transition: background-color var(--ease, 240ms ease), box-shadow var(--ease, 240ms ease);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 80px;
}

/* Отступ под фиксированную шапку */
body {
  padding-top: 80px;
}

/* Логотип */
.site-header__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  z-index: 1002;
  transition: opacity var(--ease, 240ms ease);
}

.site-header__logo:hover {
  opacity: 0.85;
}

.site-header__logo img {
  height: 48px;
  width: auto;
  display: block;
}

/* Навигация десктоп */
.site-header__nav {
  display: flex;
  align-items: center;
}

.site-header__menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header__menu-item {
  margin: 0;
  padding: 0;
}

.site-header__menu-item::before {
  display: none !important;
}

.site-header__menu-link {
  font-family: var(--font, "Rosatom", sans-serif);
  font-size: var(--fs-small, 14px);
  font-weight: 600;
  line-height: var(--lh-small, 125%);
  color: var(--color-white, #ffffff);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 8px 0;
  position: relative;
  transition: color var(--ease, 240ms ease), opacity var(--ease, 240ms ease);
}

.site-header__menu-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--color-primary-soft, #6cace4);
  transition: width var(--ease, 240ms ease);
}

.site-header__menu-link:hover {
  color: var(--color-white, #ffffff);
  opacity: 1;
  text-decoration: none;
}

.site-header__menu-link:hover::after {
  width: 100%;
}

.site-header__menu-item.current-menu-item .site-header__menu-link::after,
.site-header__menu-item.current-menu-ancestor .site-header__menu-link::after,
.site-header__menu-item.current_page_item .site-header__menu-link::after,
.site-header__menu-item.current_page_ancestor .site-header__menu-link::after,
.site-header__menu-item.is-current .site-header__menu-link::after {
  width: 100%;
}

/* Кнопка бургера (2 полоски) */
.site-header__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1002;
  border-radius: var(--radius-m, 12px);
  transition: background-color var(--ease, 240ms ease);
}

.site-header__burger:hover {
  background-color: rgba(255, 255, 255, 0.12);
}

.site-header__burger:focus-visible {
  outline: 2px solid var(--color-primary-soft, #6cace4);
  outline-offset: 2px;
}

.site-header__burger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white, #ffffff);
  border-radius: 2px;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.25s ease,
              background-color var(--ease, 240ms ease);
  transform-origin: center;
}

/* Превращение бургера в крестик при активном меню */
.site-header__burger.is-active .site-header__burger-line:first-child {
  transform: translateY(4px) rotate(45deg);
}

.site-header__burger.is-active .site-header__burger-line:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* Мобильное меню (полноэкранный оверлей) */
.mobile-menu {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100dvh;
  height: 100vh;
  background-color: var(--color-primary, #003274);
  z-index: 1001;
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-menu.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.mobile-menu__inner {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 100%;
  padding-top: 96px; /* отступ под зафиксированную шапку */
  padding-bottom: 40px;
}

/* Верхний блок: список пунктов меню */
.mobile-menu__main {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px 0 40px;
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-menu__item {
  margin: 0;
  padding: 0;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu__item::before {
  display: none !important;
}

/* Плавное каскадное появление пунктов меню */
.mobile-menu.is-active .mobile-menu__item {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu.is-active .mobile-menu__item:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu.is-active .mobile-menu__item:nth-child(2) { transition-delay: 0.15s; }
.mobile-menu.is-active .mobile-menu__item:nth-child(3) { transition-delay: 0.2s; }
.mobile-menu.is-active .mobile-menu__item:nth-child(4) { transition-delay: 0.25s; }
.mobile-menu.is-active .mobile-menu__item:nth-child(5) { transition-delay: 0.3s; }
.mobile-menu.is-active .mobile-menu__item:nth-child(6) { transition-delay: 0.35s; }
.mobile-menu.is-active .mobile-menu__item:nth-child(7) { transition-delay: 0.4s; }

.mobile-menu__link {
  font-family: var(--font, "Rosatom", sans-serif);
  font-size: var(--fs-h4, 22px);
  font-weight: 600;
  line-height: var(--lh-h4, 120%);
  color: var(--color-white, #ffffff);
  text-decoration: none;
  text-transform: uppercase;
  display: inline-block;
  transition: color var(--ease, 240ms ease), opacity var(--ease, 240ms ease), transform var(--ease, 240ms ease);
}

.mobile-menu__link:hover {
  color: var(--color-primary-soft, #6cace4);
  text-decoration: none;
  transform: translateX(4px);
}

.mobile-menu__item.current-menu-item .mobile-menu__link,
.mobile-menu__item.current-menu-ancestor .mobile-menu__link,
.mobile-menu__item.current_page_item .mobile-menu__link,
.mobile-menu__item.current_page_ancestor .mobile-menu__link,
.mobile-menu__item.is-current .mobile-menu__link {
  color: var(--color-primary-soft, #6cace4);
}

/* Нижний блок: соц сети и правовые ссылки */
.mobile-menu__footer {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding-top: 28px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1) 0.3s,
              transform 0.35s cubic-bezier(0.4, 0, 0.2, 1) 0.3s;
}

.mobile-menu.is-active .mobile-menu__footer {
  opacity: 1;
  transform: translateY(0);
}

/* Социальные сети */
.mobile-menu__socials {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
}

.mobile-menu__socials .site-footer__socials-list {
  justify-content: flex-start;
}

/* Правовые ссылки */
.mobile-menu__legal {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
}

.mobile-menu__legal-list {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
}

.mobile-menu__legal-item {
  margin: 0;
  padding: 0;
}

.mobile-menu__legal-item::before {
  display: none !important;
}

.mobile-menu__legal-link {
  font-family: var(--font, "Rosatom", sans-serif);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.72);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--ease, 240ms ease), opacity var(--ease, 240ms ease);
}

.mobile-menu__legal-link:hover {
  color: var(--color-white, #ffffff);
  opacity: 1;
}

/* Блокировка скролла при открытом меню */
body.menu-open {
  overflow: hidden;
  touch-action: none;
}

/* Адаптивность */
@media (max-width: 1100px) {
  .site-header__menu {
    gap: 18px;
  }
}

@media (max-width: 960px) {
  body {
    padding-top: 64px;
  }

  .site-header .container {
    min-height: 64px;
  }

  .site-header__logo img {
    height: 40px;
  }

  .site-header__nav {
    display: none;
  }

  .site-header__burger {
    display: flex;
  }
}

@media (max-width: 480px) {
  .mobile-menu__link {
    font-size: var(--fs-h5, 18px);
  }

  .mobile-menu__inner {
    padding-top: 80px;
    padding-bottom: 24px;
  }

  .mobile-menu__footer {
    padding-top: 20px;
    gap: 16px;
  }
}