header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 999;
}

.header__main {
  display: flex;
  padding: 10px 0;
  align-items: center;
  justify-content: space-evenly;
  background-color: var(--color-primary);
  color: var(--color-white);
  transition:
    background-color 0.3s ease,
    box-shadow 0.3s ease;
}

.header__main.scrolled {
  background-color: var(--color-white);
}

.header__main.scrolled .header__nav-link {
  color: var(--text-primary-dark);
}

.header__content {
  display: flex;
  align-items: center;
  gap: 40px;
}

.header__nav-list {
  display: flex;
  gap: 30px;
}

.header__nav-item {
  list-style: none;
}

.header__nav-item a {
  color: var(--text-secondary-light);
}

.header__nav-item a:hover {
  color: var(--color-white);
}

.header__main.scrolled .header__nav-item a:hover {
  color: var(--text-secondary-dark);
  opacity: 0.8;
}

.header__nav-link {
  text-decoration: none;
  color: var(--text-primary-light);
}

.header__nav-item--dropdown {
  position: relative;
}

.dropdown::before {
  content: "";
  position: absolute;
  top: -20px;
  width: 100%;
  height: 20px;
  background: transparent;
}

.dropdown {
  display: grid;
  grid-template-columns: repeat(2, 250px);
  gap: 5px 10px;
  position: absolute;
  top: 100%;
  left: -100px;
  margin-top: 20px;
  background-color: var(--color-white);
  padding: 30px;
  border-radius: 12px;

  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition:
    opacity 0.3s ease,
    transform 0.3s ease,
    visibility 0.3s;
}

.dropdown li {
  list-style: none;
}

.dropdown li a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: var(--text-secondary-dark);
  text-decoration: none;
  transition: background 0.2s ease;
}

.dropdown li a img {
  width: 25px;
  height: 25px;
  object-fit: contain;
}

.dropdown li a:hover {
  color: var(--color-primary-light);
}

.dropdown li a span {
  font-size: 1rem;
  white-space: nowrap;
}

.header__nav-item--dropdown:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.header__burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
}

.header__burger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-white);
  margin: 6px 0;
  transition: 0.3s;
}

.header__actions {
  display: flex;
  gap: 20px;
}

.header__actions a {
  text-decoration: none;
}

.header__button {
  padding: 15px 20px;
  border-radius: 20px;
  cursor: pointer;
  color: var(--text-primary-dark);
}

.header__button--login {
  display: flex;
  align-items: center;
  gap: 5px;
  background-color: var(--color-primary);
  color: var(--text-primary-light);
  border: none;
  transition:
    background-color 0.3s ease,
    box-shadow 0.3s ease;
}

.header__button--login img {
  width: 20px;
  height: 20px;
  object-fit: contain;
}

.header__button--login:hover p {
  color: var(--text-primary-dark);
}

.header__button--login:hover img {
  filter: invert(80%) sepia(27%) saturate(0%) hue-rotate(180deg) brightness(76%)
    contrast(101%);
}

.header__button--login.scrolled {
  background-color: var(--color-white);
  color: var(--text-primary-dark);
}

.header__button--login.scrolled img {
  filter: invert(80%) sepia(27%) saturate(0%) hue-rotate(180deg) brightness(76%)
    contrast(101%);
}

.header__button--login.scrolled:hover p {
  color: var(--color-primary);
}

.header__button--login.scrolled:hover img {
  filter: invert(55%) sepia(47%) saturate(4159%) hue-rotate(203deg)
    brightness(106%) contrast(103%);
}

.header__button--register {
  background-color: var(--color-primary-dark);
  color: var(--text-primary-light);
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.header__button--register:hover {
  box-shadow: 0 0 5px var(--color-primary-light);
  color: var(--color-primary);
  background-color: var(--color-white);
}

@media (max-width: 1200px) {
  .header__main {
    justify-content: space-between;
    padding: 10px 4%;
  }

  .header__content {
    gap: 24px;
  }

  .header__nav-list {
    gap: 20px;
  }
}

@media (max-width: 992px) {
  .header__nav-link {
    font-size: 0.9rem;
  }

  .header__actions {
    gap: 16px;
  }

  .header__button {
    padding: 12px 16px;
  }
}

@media (max-width: 900px) {
  .header__main.scrolled .header__burger span {
    background-color: var(--color-primary);
  }

  .header__burger {
    display: block;
    z-index: 10000;
  }

  .header__nav {
    display: block;
    position: fixed;
    top: 0;
    right: -100%;
    width: 85%;
    max-width: 320px;
    height: 100vh;
    background: var(--color-white);
    padding: 100px 20px 20px;
    transition: right 0.3s ease;
    z-index: 10000;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.12);
  }

  .header__nav.active {
    right: 0;
  }

  .header__nav-list {
    flex-direction: column;
    gap: 20px;
  }

  .header__nav-link {
    color: var(--text-primary-dark);
    font-size: 1rem;
  }

  .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    margin: 0 0 0 0;
    background: transparent;
    grid-template-columns: 1fr;
    display: none;
    padding-left: 12px;
    gap: 4px;
  }

  .dropdown li a {
    padding: 10px 14px;
    font-size: 0.95rem;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.03);
  }

  .dropdown li a:hover {
    background: rgba(0, 0, 0, 0.07);
  }

  .header__nav-item a {
    display: flex;
    align-items: center;
    padding: 14px 16px;
    border-radius: 10px;
    font-weight: 500;
    color: var(--text-primary-dark);
    transition:
      background 0.2s ease,
      color 0.2s ease;
  }

  .header__nav-item a:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--color-primary);
  }

  .header__nav-item--dropdown > a {
    justify-content: space-between;
  }

  .header__nav-item--dropdown.active .dropdown {
    display: grid;
    gap: 10px;
    padding: 10px;
  }

  .header__nav-item--dropdown:hover .dropdown {
    opacity: unset;
    visibility: unset;
    transform: unset;
  }
}

@media (max-width: 768px) {
  .header__main {
    padding: 10px 16px;
  }

  .header__content {
    gap: 0;
  }

  .header__actions {
    gap: 10px;
  }
}

@media (max-width: 550px) {
  .header__main {
    flex-wrap: wrap;
    gap: 10px;
  }

  .menu-open .header .header__main .header__burger span {
    background-color: var(--color-primary);
  }

  .header__actions {
    width: 100%;
    justify-content: space-between;
  }

  .header__button {
    flex: 1;
    padding: 10px;
    font-size: 0.95rem;
    justify-content: center;
  }

  .header__button--login {
    gap: 6px;
  }
}