/* ========================================
   HEADER / DESKTOP NAVIGATION
======================================== */

.site-header {
  position: relative;
  z-index: 50;
  width: 100%;
  background: var(--bg-base);
  border-bottom: 1px solid var(--border-default-2);
}

.site-header__inner {
  position: relative;
  width: var(--container-width);
  max-width: var(--container-max-width);
  min-height: clamp(4.5rem, 6.2vw, 6.25rem);
  margin-inline: auto;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3vw;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.site-logo img {
  width: clamp(6.5rem, 8.5vw, 8.5rem);
  height: auto;
}

.site-logo__fallback {
  display: inline-flex;
  align-items: center;
  gap: 0.7vw;

  font-size: clamp(0.8rem, 1vw, 1rem);
  font-weight: var(--font-weight-semibold);
  color: var(--text-heading-brand);
}

.site-logo__mark {
  display: grid;
  place-items: center;
  width: clamp(2.2rem, 2.8vw, 2.75rem);
  aspect-ratio: 1;
  border-radius: 50%;
  color: var(--text-inverse-primary);
  background: var(--action-default);
}

.desktop-nav {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);

  display: flex;
  align-items: center;
  gap: clamp(1.1rem, 2vw, 2.2rem);
}

.desktop-nav__item {
  position: relative;
}

.desktop-nav__link,
.desktop-nav__toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45vw;

  min-height: clamp(2.5rem, 3vw, 3rem);

  font-size: clamp(0.78rem, 0.95vw, 0.95rem);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);

  transition: color var(--transition-fast);
}

.desktop-nav__link:hover,
.desktop-nav__link.is-active,
.desktop-nav__toggle:hover,
.desktop-nav__toggle[aria-expanded="true"] {
  color: var(--text-accent);
}

.desktop-nav__chevron {
  width: clamp(0.7rem, 0.9vw, 0.9rem);
  height: clamp(0.7rem, 0.9vw, 0.9rem);
  transition: transform var(--transition-base);
}

.desktop-nav__toggle[aria-expanded="true"] .desktop-nav__chevron {
  transform: rotate(180deg);
}

.desktop-dropdown {
  position: absolute;
  top: calc(100% + clamp(0.35rem, 0.7vw, 0.75rem));
  left: 50%;
  min-width: clamp(12rem, 14vw, 15rem);
  padding: clamp(0.7rem, 1vw, 1rem);
  transform: translateX(-50%) translateY(-0.4rem);

  opacity: 0;
  visibility: hidden;
  pointer-events: none;

  background: var(--bg-base);
  border: 1px solid var(--border-default-2);
  border-radius: var(--radius-medium);
  box-shadow: 0 1vw 3vw rgba(11, 27, 58, 0.12);

  transition:
    opacity var(--transition-base),
    transform var(--transition-base),
    visibility var(--transition-base);
}

.desktop-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.desktop-dropdown__link {
  display: block;
  padding: clamp(0.6rem, 0.8vw, 0.8rem);
  border-radius: var(--radius-small);

  font-size: clamp(0.75rem, 0.9vw, 0.9rem);
  color: var(--text-primary);

  transition:
    color var(--transition-fast),
    background-color var(--transition-fast);
}

.desktop-dropdown__link:hover {
  color: var(--text-accent);
  background: var(--color-brand-pale);
}

.site-header__cta {
  flex: 0 0 auto;
}


/* ========================================
   MOBILE HEADER
======================================== */

.mobile-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;

  width: clamp(2.6rem, 11vw, 3rem);
  aspect-ratio: 1;

  color: var(--text-heading-brand);
  border: 1px solid var(--border-default-2);
  border-radius: var(--radius-small);
}

.mobile-menu-toggle svg {
  width: 46%;
  height: 46%;
}

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 100;

  display: grid;
  grid-template-rows: auto 1fr auto;
  width: 100%;
  height: 100dvh;
  padding: 0 5vw 5vw;

  background: var(--bg-base);
  transform: translateX(100%);
  visibility: hidden;

  transition:
    transform var(--transition-base),
    visibility var(--transition-base);
}

.mobile-menu.is-open {
  transform: translateX(0);
  visibility: visible;
}

.mobile-menu__top {
  min-height: clamp(4.5rem, 18vw, 5.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-default-2);
}

.mobile-menu__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: clamp(2.5rem, 10vw, 3rem);
  aspect-ratio: 1;
  color: var(--text-heading-brand);
}

.mobile-menu__close svg {
  width: 42%;
  height: 42%;
}

.mobile-menu__body {
  overflow-y: auto;
  padding-block: 7vw;
}

.mobile-nav {
  display: grid;
}

.mobile-nav__row {
  border-bottom: 1px solid var(--border-default-2);
}

.mobile-nav__link,
.mobile-nav__toggle {
  width: 100%;
  min-height: clamp(3.8rem, 15vw, 4.75rem);

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4vw;

  font-size: clamp(1.1rem, 5vw, 1.45rem);
  font-weight: var(--font-weight-regular);
  color: var(--text-primary);
  text-align: left;
}

.mobile-nav__toggle svg {
  width: clamp(0.9rem, 4vw, 1.1rem);
  height: clamp(0.9rem, 4vw, 1.1rem);
  flex: 0 0 auto;
  transition: transform var(--transition-base);
}

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

.mobile-accordion {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;

  transition:
    grid-template-rows var(--transition-base),
    opacity var(--transition-base);
}

.mobile-accordion.is-open {
  grid-template-rows: 1fr;
  opacity: 1;
}

.mobile-accordion__inner {
  min-height: 0;
  overflow: hidden;
}

.mobile-accordion__list {
  display: grid;
  padding-bottom: 4vw;
}

.mobile-accordion__link,
.mobile-contact__item {
  display: block;
  padding: 3vw 0;

  font-size: clamp(0.85rem, 3.8vw, 1rem);
  color: var(--text-secondary);
  border-top: 1px solid var(--border-default-2);
}

.mobile-accordion__link:hover,
.mobile-contact__item:hover {
  color: var(--text-accent);
}

.mobile-menu__footer {
  padding-top: 4vw;
  border-top: 1px solid var(--border-default-2);
}

.mobile-menu__footer .button {
  width: 100%;
}


/* ========================================
   RESPONSIVE
======================================== */

@media (max-width: 900px) {
  .desktop-nav,
  .site-header__cta {
    display: none;
  }

  .mobile-menu-toggle {
    display: inline-flex;
  }

  .site-header__inner {
    min-height: clamp(4.25rem, 17vw, 5.25rem);
  }

  .site-logo img {
    width: clamp(7rem, 31vw, 9rem);
  }
}

@media (min-width: 901px) {
  .mobile-menu {
    display: none;
  }
}


/* ========================================
   ACCESSIBILITY / STATE
======================================== */

body.menu-open {
  overflow: hidden;
}

.desktop-nav__link:focus-visible,
.desktop-nav__toggle:focus-visible,
.desktop-dropdown__link:focus-visible,
.mobile-nav__link:focus-visible,
.mobile-nav__toggle:focus-visible,
.mobile-accordion__link:focus-visible,
.mobile-contact__item:focus-visible,
.mobile-menu-toggle:focus-visible,
.mobile-menu__close:focus-visible {
  outline: 2px solid var(--border-accent);
  outline-offset: 3px;
}

/* ========================================
   CONTACTS DROPDOWN
======================================== */

.desktop-nav__item--contacts {
  position: relative;
}

.desktop-contacts {
  position: absolute;
  top: calc(100% + 1rem);
  right: 0;

  width: min(34rem, 70vw);
  padding: 1rem 1.5rem;

  border: 1px solid var(--border-default-2);
  border-radius: 1rem;

  background: #ffffff;
  box-shadow: 0 1rem 2.5rem rgba(25, 52, 98, 0.12);

  opacity: 0;
  visibility: hidden;
  transform: translateY(-0.5rem);

  transition:
    opacity 0.2s ease,
    transform 0.2s ease,
    visibility 0.2s ease;

  z-index: 100;
}

.desktop-contacts.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.desktop-contacts__link {
  display: block;

  padding: 1.1rem 0;

  border-bottom: 1px solid var(--border-default-2);

  font-size: clamp(1.15rem, 1.6vw, 1.55rem);
  line-height: 1.2;

  color: var(--text-secondary);
}

.desktop-contacts__link:last-child {
  border-bottom: 0;
}

.desktop-contacts__link:hover {
  color: var(--text-accent);
}

.desktop-contacts__toggle[aria-expanded="true"]
.desktop-nav__chevron {
  transform: rotate(180deg);
}

/* ========================================
   CONTACTS DROPDOWN SIZE + POSITION
======================================== */

.desktop-contacts {
  position: absolute;
  top: calc(100% + 0.35rem);
  right: 0;

  width: clamp(17rem, 22vw, 21rem);
  padding: 0.35rem 1.1rem;

  border: 1px solid #dfe5ef;
  border-radius: 0.85rem;

  background: #ffffff;
  box-shadow: 0 0.7rem 1.8rem rgba(25, 52, 98, 0.1);

  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-0.35rem);

  transition:
    opacity 0.2s ease,
    visibility 0.2s ease,
    transform 0.2s ease;

  z-index: 1000;
}

.desktop-contacts.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.desktop-contacts__link {
  display: block;
  padding: 0.8rem 0;

  border-bottom: 1px solid #e3e8f0;

  font-size: clamp(0.95rem, 1.05vw, 1.1rem);
  line-height: 1.25;
  color: #65738f;
}

.desktop-contacts__link:last-child {
  border-bottom: 0;
}

.desktop-contacts__link:last-child {
  border-bottom: 0;
}

.desktop-contacts {
  top: calc(100% + 0.35rem);
}

.site-logo img {
  width: clamp(7rem, 9vw, 9rem);
}

.site-header__cta {
  padding: 0.85rem 1.5rem;
  font-size: 0.95rem;
}

/* Финальная фиксация шапки */

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header__cta {
  flex: 0 0 auto;
  margin-left: auto;
  width: auto;
  white-space: nowrap;

  padding: 0.85rem 1.5rem;
  font-size: 0.95rem;
}

@media (min-width: 901px) {
  .site-header {
    transition: padding-bottom 0.2s ease;
  }

  .site-header:has(.desktop-contacts.is-open) {
    padding-bottom: 7.5rem;
  }
}
@media (min-width: 901px) {
  .site-header__inner {
    position: relative !important;
    display: flex !important;
    align-items: center !important;

    min-height: clamp(5.5rem, 7vw, 7rem);
  }

  .site-header__cta {
    position: absolute !important;
    top: 50% !important;
    right: clamp(1.5rem, 4vw, 4.5rem) !important;
    left: auto !important;

    width: auto !important;
    min-width: 0 !important;
    margin: 0 !important;

    transform: translateY(-50%) !important;

    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;

    padding: 0.85rem 1.5rem !important;
    white-space: nowrap !important;
  }

  .desktop-nav {
    position: absolute !important;
    top: 50% !important;
    left: 50% !important;

    transform: translate(-50%, -50%) !important;
  }
}

@media (min-width: 901px) {
  .desktop-contacts {
    position: absolute !important;

    top: calc(100% + 0.3rem) !important;
    right: 0 !important;
    left: auto !important;

    width: 20rem !important;
    max-width: none !important;

    padding: 0.3rem 1rem !important;

    border-radius: 0.8rem !important;
    background: #ffffff !important;

    z-index: 1000 !important;
  }

  .desktop-contacts__link {
    padding: 0.75rem 0 !important;

    font-size: 1rem !important;
    line-height: 1.25 !important;
  }
}
@media (min-width: 901px) {
  .site-header {
    padding-bottom: 0;
    transition: padding-bottom 0.22s ease;
  }

  /* Открыты контакты */
  .site-header:has(.desktop-contacts.is-open) {
    padding-bottom: 7rem;
  }

  /* Открыты услуги */
  .site-header:has(.desktop-dropdown.is-open) {
    padding-bottom: 13rem;
  }
}

@media (max-width: 900px) {
  .site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;

    width: 100%;
  }

  .site-header .site-logo {
    flex: 0 0 auto;
  }

  .mobile-menu-toggle {
    position: static;
    flex: 0 0 auto;

    margin: 0 0 0 auto;
  }

  .desktop-nav,
  .site-header__cta {
    display: none;
  }
}

@media (max-width: 900px) {
  .mobile-menu-toggle {
    left: auto;
    right: auto;
    top: auto;

    width: 3rem;
    height: 3rem;
  }
}

@media (max-width: 900px) {
  .site-header__inner {
    min-height: 4.5rem;
    padding-inline: 1.25rem;
  }

  .site-logo img {
    display: block;
    width: auto;
    height: 3.5rem;
  }
}

.mobile-nav__link.is-active,
.mobile-nav__toggle.is-active {
  color: var(--text-accent);
}