header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
}

header img {
  max-height: 20px;
}

.nav-list {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
  margin-top: -25px;
}

.nav-item a {
  font-size: 16px;
  color: #333;
  position: relative;
  overflow: hidden;
  transition: color 0.3s ease;
}

.nav-item a:hover {
  color: var(--main-color);
}

.nav-item a::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 50%;
  width: 0%;
  height: 2px;
  background-color: var(--main-color);
  transition: width 0.3s ease;
  transform: translateX(-50%);
}

.nav-item a:hover::before,
.nav-item a:active::before {
  width: 100%;
}

@media (max-width: 769px) {
  .nav-list {
    margin-right: 10px;
  }
}

@media (max-width: 720px) {
  header {
    display: flex;
    flex-direction: column;
    align-items: center;
    border-bottom: 2px solid #f2f2f2;
    padding-bottom: 0;
    position: relative;
  }

  .nav-list {
    display: flex;
    width: 100%;
    margin-top: 20px;
    gap: 302px;
    list-style: none;
    padding: 0 0 5px 0;
  }

  .nav-item {
    flex: 1;
    text-align: center;
  }

  .nav-item a {
    position: relative;
    width: 100%;
    padding: 15px 0 5px;
    font-size: 16px;
    color: #333;
    transition: color 0.3s ease;
  }

  .nav-item:nth-child(1) a::before {
    content: "";
    position: absolute;
    top: 38px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--main-color);
    transition: width 0.3s ease;
  }

  .nav-item:nth-child(2) a::before {
    content: "";
    position: absolute;
    top: 38px;
    left: 0px;
    width: 0;
    height: 2px;
    background-color: var(--main-color);
    transition: width 0.3s ease;
  }

  .nav-item:nth-child(1) a:hover::before {
    width: 70vw;
  }

  .nav-item:nth-child(2) a:hover::before {
    width: 50vw;
  }
}

@media (max-width: 700px) {
  .nav-list {
    gap: 297px;
  }
  
}

@media (max-width: 675px) {
  .nav-list {
    gap: 272px;
  }
}

@media (max-width: 650px) {
  .nav-list {
    gap: 253px;
  }

  .nav-item:nth-child(2) a::before {
    left: 8px;
  }
}

@media (max-width: 625px) {
  .nav-list {
    gap: 235px;
  }
}

@media (max-width: 600px) {
  .nav-list {
    gap: 228px;
  }

  .nav-item:nth-child(2) a::before {
    left: 10px;
  }
}

@media (max-width: 575px) {
  .nav-list {
    gap: 212px;
  }
}

@media (max-width: 550px) {
  .nav-list {
    gap: 202px;
  }

  .nav-item:nth-child(1) a:hover::before {
    width: 75vw;
  }
}

@media (max-width: 525px) {
  .nav-list {
    gap: 190px;
  }
}

@media (max-width: 500px) {
  .nav-list {
    gap: 179px;
  }
}

@media (max-width: 475px) {
  .nav-list {
    gap: 168px;
  }
  .nav-item:nth-child(2) a::before {
    left: 5px;
  }
}

@media (max-width: 450px) {
  .nav-list {
    gap: 152px;
  }
}

@media (max-width: 425px) {
  .nav-list {
    gap: 139px;
  }
}

@media (max-width: 400px) {
  .nav-list {
    gap: 125px;
  }

  .nav-item:nth-child(2) a::before {
    left: 8px;
  }

  .nav-item:nth-child(1) a:hover::before {
    width: 80vw;
  }
}

@media (max-width: 375px) {
  .nav-list {
    gap: 124px;
  }

  .nav-item:nth-child(2) a::before {
    left: 2px;
  }

  .nav-item:nth-child(1) a:hover::before {
    width: 82vw;
  }
}

@media (max-width: 350px) {
  .nav-list {
    gap: 90px;

  }

  .nav-item:nth-child(1) a:hover::before {
    width: 80vw;
  }

  .nav-item:nth-child(2) a::before {
    left: 10px;
  }
}