.header {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 227, 231, 0.5);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

/* Logo — гео-метка: нижняя треть свисает за границу хедера */
.header__logo {
  display: flex;
  align-items: flex-start;
  padding-top: 6px;
}

.header__logo img {
  height: 78px;
  width: auto;
  opacity: 1;
  margin-bottom: -16px;
}

.header__nav {
  display: flex;
  gap: 0;
}

.header__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-soft);
  transition: all var(--transition);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  position: relative;
}

.header__link:hover {
  color: var(--color-dark);
  background: var(--color-bg);
}

/* Активная страница — подчёркивание */
.header__link--active {
  color: var(--color-dark);
  font-weight: 600;
  background: transparent;
}

.header__link--active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 78%;
  height: 1px;
  border-radius: 2px;
  background: var(--color-dark);
}

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

/* ============================================
   Hamburger menu — mobile only
   ============================================ */
.menu-toggle {
  display: none;
}

.menu-toggle__btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 36px;
  cursor: pointer;
  gap: 5px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.menu-toggle__btn:hover {
  background: var(--color-bg);
}

.menu-toggle__btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}

/* Анимация бургера → крестик */
.menu-toggle:checked + .menu-toggle__btn span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle:checked + .menu-toggle__btn span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.menu-toggle:checked + .menu-toggle__btn span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Анимация появления меню */
.header__mobile-nav {
  display: none;
}

@media (max-width: 768px) {
  .header__nav { display: none; }

  .menu-toggle__btn {
    display: flex;
  }

  .header__mobile-nav {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md) var(--space-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.3s ease;
    z-index: 99;
  }

  .menu-toggle:checked ~ .header__mobile-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .header__mobile-nav .header__link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-base);
    border-radius: var(--radius-md);
  }

  .header__mobile-nav .header__link--active::after {
    display: none;
  }

  .header__mobile-nav .header__link--active {
    background: color-mix(in srgb, var(--color-blue) 8%, transparent);
    color: var(--color-blue);
  }

  .header__mobile-nav .header__actions {
    flex-direction: column;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-sm);
    padding-top: var(--space-md);
  }

  .header__mobile-nav .header__actions .btn {
    width: 100%;
    justify-content: center;
  }

  /* Прячем кнопки из основной плашки хедера — они дублированы в мобильном меню */
  .header__inner > .header__actions {
    display: none;
  }
}