/* ==========================================================================
   Главное меню сайта — «Формула здоровья»
   Одна разметка для десктопа (выпадающие панели) и мобильных (выезжающая
   панель с аккордеонами). Токены — из concept-3.css.
   ========================================================================== */

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -100px;
  z-index: 3000;
  padding: 10px 16px;
  background: var(--color-primary-dark);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-weight: 600;
}

.skip-link:focus {
  top: 12px;
}

.top-bar__item a:hover,
.header-login:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.header-login {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.header-login svg {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
}

/* Общий фокус для всех интерактивных элементов меню */
.main-nav a:focus-visible,
.main-nav button:focus-visible,
.main-nav input:focus-visible,
.nav-burger:focus-visible,
.header-login:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   Кнопка-бургер (видна до 1024px)
   -------------------------------------------------------------------------- */
.nav-burger {
  display: none;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  min-height: 44px;
  padding: 0 14px;
  background: var(--color-primary-ultralight);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-md);
  color: var(--color-primary-dark);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
}

.nav-burger svg {
  width: 20px;
  height: 20px;
}

/* --------------------------------------------------------------------------
   Десктоп
   -------------------------------------------------------------------------- */
.main-nav {
  border-top: 1px solid var(--color-border);
  background: var(--color-white);
}

.main-nav__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  position: relative;
}

.main-nav__head,
.main-nav__extra,
.nav-backdrop {
  display: none;
}

.main-nav__list {
  list-style: none;
  display: flex;
  align-items: stretch;
  gap: 4px;
  margin-left: -12px;
}

.main-nav__item {
  display: flex;
}

.main-nav__trigger {
  display: flex;
  align-items: center;
}

.main-nav__link,
.main-nav__toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 52px;
  padding: 0 12px;
  background: transparent;
  border: 0;
  color: var(--color-primary-dark);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  position: relative;
  transition: color 0.15s ease;
}

.main-nav__trigger .main-nav__link {
  padding-right: 2px;
}

.main-nav__trigger .main-nav__link + .main-nav__toggle {
  padding: 0 10px 0 4px;
}

.main-nav__toggle svg {
  width: 12px;
  height: 12px;
  color: var(--color-text-soft);
  transition: transform 0.2s ease;
}

.main-nav__toggle[aria-expanded="true"] svg {
  transform: rotate(180deg);
  color: var(--color-primary);
}

/* Подчёркивание активного / открытого раздела */
.main-nav__item > .main-nav__link::after,
.main-nav__trigger::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: -1px;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: transparent;
  transition: background-color 0.15s ease;
}

.main-nav__trigger {
  position: relative;
}

.main-nav__item:hover > .main-nav__link,
.main-nav__item:hover .main-nav__link,
.main-nav__item:hover .main-nav__toggle {
  color: var(--color-primary);
}

.main-nav__item.is-open .main-nav__trigger::after,
.main-nav__item.is-current > .main-nav__link::after,
.main-nav__item.is-current .main-nav__trigger::after {
  background: var(--color-primary);
}

/* Поиск */
.nav-search {
  margin-left: auto;
  position: relative;
  flex: 0 1 240px;
}

.nav-search__input {
  width: 100%;
  height: 38px;
  padding: 0 40px 0 14px;
  background: var(--color-bg-page);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-main);
  font-size: 14px;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.nav-search__input::placeholder {
  color: var(--color-text-soft);
}

.nav-search__input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(18, 91, 80, 0.1);
}

.nav-search__btn {
  position: absolute;
  top: 0;
  right: 0;
  width: 40px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 0;
  color: var(--color-primary);
  cursor: pointer;
}

.nav-search__btn svg {
  width: 18px;
  height: 18px;
}

/* Выпадающие панели */
.nav-panel {
  position: absolute;
  top: 100%;
  z-index: 200;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0s linear 0.16s;
}

.main-nav__item.is-open > .nav-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0s;
}

.nav-panel--mega {
  left: 24px;
  right: 24px;
}

.nav-panel--mega .nav-panel__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px 32px;
  padding: 28px 32px;
}

.main-nav__item:has(> .nav-panel--compact),
.main-nav__item:has(> .nav-panel--list) {
  position: relative;
}

.nav-panel--compact,
.nav-panel--list {
  left: 0;
  border-radius: var(--radius-xl);
}

.nav-panel--compact {
  min-width: 600px;
}

.nav-panel--compact .nav-panel__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 32px;
  padding: 24px 28px;
}

.nav-panel--list {
  min-width: 280px;
}

.nav-panel--list .nav-panel__grid {
  padding: 16px 12px;
}

.nav-group + .nav-group {
  margin-top: 20px;
}

.nav-group__title {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text-soft);
  margin-bottom: 8px;
  padding: 0 10px;
}

a.nav-group__title {
  color: var(--color-primary-dark);
  font-size: 15px;
}

a.nav-group__title:hover {
  color: var(--color-primary);
}

.nav-group__list {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.nav-group__link {
  display: block;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  line-height: 1.35;
  color: var(--color-text-main);
  transition: background-color 0.12s ease, color 0.12s ease;
}

.nav-group__link:hover {
  background: var(--color-primary-ultralight);
  color: var(--color-primary);
}

.nav-group__link[aria-current="page"] {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 600;
}

.nav-group__hint {
  display: block;
  font-size: 12.5px;
  color: var(--color-text-soft);
  margin-top: 1px;
}

/* Нижняя строка мега-меню: ссылка на весь каталог + запись */
.nav-panel__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px 32px;
  background: var(--color-primary-ultralight);
  border-top: 1px solid var(--color-border);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.nav-panel__all {
  font-weight: 600;
  color: var(--color-primary);
}

.nav-panel__all:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.nav-panel__cta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  color: var(--color-text-muted);
}

.nav-panel__cta a[href^="tel"] {
  font-weight: 700;
  color: var(--color-primary-dark);
}

/* --------------------------------------------------------------------------
   Планшеты и телефоны: выезжающая панель
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .nav-burger {
    display: inline-flex;
  }

  .header-main__inner .header-contacts {
    margin-left: auto;
  }

  .header-main__inner .header-contacts + .nav-burger {
    margin-left: 16px;
  }

  .header-login {
    display: none;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 1500;
    width: min(420px, 100%);
    border-top: 0;
    box-shadow: -12px 0 32px rgba(15, 61, 62, 0.18);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 0.25s ease, visibility 0s linear 0.25s;
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .main-nav.is-open {
    transform: translateX(0);
    visibility: visible;
    transition: transform 0.25s ease, visibility 0s;
  }

  .nav-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 1400;
    background: rgba(10, 40, 41, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0s linear 0.2s;
  }

  .nav-backdrop.is-visible {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.2s ease, visibility 0s;
  }

  .main-nav__inner {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0 0 32px;
    min-height: 100%;
  }

  .main-nav__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 2;
    padding: 12px 20px;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
  }

  .main-nav__head-title {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 600;
    color: var(--color-primary-dark);
  }

  .main-nav__close {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-subtle);
    border: 0;
    border-radius: 50%;
    color: var(--color-primary-dark);
    cursor: pointer;
  }

  .main-nav__close svg {
    width: 20px;
    height: 20px;
  }

  .nav-search {
    order: -1;
    flex: none;
    margin: 16px 20px 8px;
  }

  .nav-search__input,
  .nav-search__btn {
    height: 46px;
  }

  .nav-search__input {
    font-size: 16px; /* без автозума в iOS */
  }

  .main-nav__list {
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 0 8px;
  }

  .main-nav__item {
    flex-direction: column;
    border-bottom: 1px solid var(--color-border);
  }

  .main-nav__trigger {
    justify-content: space-between;
  }

  .main-nav__trigger::after,
  .main-nav__item > .main-nav__link::after {
    display: none;
  }

  .main-nav__link,
  .main-nav__toggle {
    min-height: 54px;
    font-size: 17px;
    padding: 0 12px;
  }

  .main-nav__trigger .main-nav__link {
    flex: 1;
  }

  .main-nav__trigger .main-nav__link + .main-nav__toggle {
    width: 54px;
    justify-content: center;
    padding: 0;
    border-left: 1px solid var(--color-border);
  }

  .main-nav__toggle--full {
    width: 100%;
    justify-content: space-between;
  }

  .main-nav__toggle svg {
    width: 14px;
    height: 14px;
  }

  .main-nav__item.is-current > .main-nav__link,
  .main-nav__item.is-current .main-nav__link,
  .main-nav__item.is-current .main-nav__toggle--full {
    color: var(--color-primary);
  }

  .nav-panel,
  .main-nav__item.is-open > .nav-panel {
    position: static;
    min-width: 0;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: none;
    display: none;
  }

  .main-nav__item.is-open > .nav-panel {
    display: block;
  }

  .nav-panel--mega .nav-panel__grid,
  .nav-panel--compact .nav-panel__grid,
  .nav-panel--list .nav-panel__grid {
    display: block;
    padding: 4px 4px 16px;
  }

  .nav-group + .nav-group {
    margin-top: 16px;
  }

  .nav-group__title {
    padding: 0 12px;
  }

  .nav-group__link {
    padding: 10px 12px;
    font-size: 16px;
  }

  .nav-group__hint {
    display: none;
  }

  .nav-panel__footer {
    border-radius: var(--radius-md);
    margin: 0 4px 16px;
    padding: 14px 12px;
  }

  .nav-panel__cta {
    display: none;
  }

  .main-nav__extra {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: auto;
    padding: 24px 20px 0;
  }

  .main-nav__phones {
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

  .main-nav__phones a {
    font-size: 19px;
    font-weight: 700;
    color: var(--color-primary-dark);
    padding: 4px 0;
  }

  .main-nav__phones span {
    font-size: 13px;
    color: var(--color-text-soft);
  }

  .main-nav__extra .btn {
    width: 100%;
    min-height: 48px;
  }

  body.nav-locked {
    overflow: hidden;
  }

  /* Панель живёт внутри sticky-шапки: поднимаем шапку над затемнением */
  body.nav-locked .site-header {
    z-index: 1500;
  }

  body.nav-locked .mobile-bottom-bar {
    display: none;
  }

  .main-nav__head {
    order: -2;
  }

  .nav-panel__col + .nav-panel__col {
    margin-top: 16px;
  }
}

@media (max-width: 768px) {
  .header-main__inner .nav-burger,
  .header-main__inner .header-contacts + .nav-burger {
    margin-left: auto;
  }

  .nav-burger__label {
    display: none;
  }

  .nav-burger {
    width: 48px;
    height: 48px;
    padding: 0;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .main-nav,
  .nav-panel,
  .nav-backdrop,
  .main-nav__toggle svg {
    transition: none !important;
  }
}