header {
  position: fixed;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  top: 0;
  right: 0;
  left: 0;
  background-color: var(--white-t-sw);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  font-weight: 500;
  letter-spacing: 1px;
  font-size: 1.6rem;
  box-shadow: 0 -2.5rem 3rem var(--shadow-sw);
  z-index: 999;
}

header a {
  line-height: 0;
}

header .logo {
  height: 7rem;
  padding: 0.5rem 1.2rem;
  margin-left: 2rem;
}

header div {
  display: flex;
  align-items: center;
}

header .burger {
  display: none;
}

header .line {
  display: none;
}

header nav {
  display: flex;
  flex-direction: row;
  gap: 2rem;

  margin-right: 2rem;
}

header nav a {
  position: relative;
  text-decoration: none;
  color: var(--black-sw);
}

header nav a::after {
  content: '';
  position: absolute;
  bottom: -1.5rem;
  border-radius: 1rem;
  left: 50%;
  background-color: var(--blue);
  height: 0.3rem;
  width: 0;
  transition: width 0.2s ease, left 0.2s ease;
}

header nav a:hover::after {
  width: 106%;
  left: -3%;
}

header .switch {
  box-sizing: content-box;
  background-color: transparent;
  border: none;
  margin: 0;
  padding: 2rem 1rem;
  height: 3.3rem;
  cursor: pointer;
  margin: 0 2rem;
}

header .switch img {
  padding: 0;
  width: 100%;
  height: 100%;
}

@media screen and (max-width: 1105px) {
  header .logo {
    margin: 0;
  }

  header .switch {
    margin: 0;
  }

  header .burger {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    cursor: pointer;
    gap: 1.2rem;
    padding: 1.5rem;
    margin: 0;
    background-color: transparent;
    border: none;
    order: 3;
  }

  header .line {
    display: block;
    background-color: var(--blue);
    border-radius: 1rem;
    height: 0.5rem;
    width: 5rem;
    transition: transform 0.3s ease;
  }

  .burger.active .line:first-child {
    transform: translate(0)translateY(1.7rem)rotate(-45deg);
  }

  .burger.active .line:nth-child(2) {
    transform: scaleY(0);
  }

  .burger.active .line:nth-child(3) {
    transform: translate(0rem)translateY(-1.7rem)rotate(45deg);
  }

  header nav {
    flex-direction: column;
    align-items: center;
    padding: 0;
    gap: 0;
    position: absolute;
    right: 0;
    top: 8rem;
    transform: translate(100%);
    width: 100%;
    background-color: var(--white-t-sw);
    border-radius: 0 0 2rem 2rem;
    transition: transform 0.3s ease;
  
    margin-right: 0rem;
  }

  header nav.active {
    transform: translate(0);
  }

  header nav a {
    padding: 3rem 0;
    width: 100%;
    text-align: center;
    border-bottom: 1px solid var(--border-sw);
  }

  header nav a:last-child {
    border-bottom: none;
  }

  header nav a::after {
    display: none;
  }
}