.top-slider .slide {
    position: relative;
    width: 100%;
    height: 700px;
    background-repeat: no-repeat;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide::before {
    content: "";
    position: absolute;
    top: 0px;
    right: 0px;
    bottom: 0px;
    left: 0px;
    background-color: #00acb52a;
}

.slide h2 {
    position: relative;
    color: #eeeeee;
    text-align: center;

}

.slide-1 {
    background-image: url("assets/img/Изображение 255.jpg");
}

.slide-2 {
    background-image: url("assets/img/нгпеан 024.jpg");
}

.slide-3 {
    background-image: url("assets/img/IMG_3285-crop.jpg");
}


.category {
    width: 90%;
    margin: auto;
    margin-top: 140px;
}

.category-item {
    width: 100%;
    height: 90vh;
    margin-top: 20px;
    margin-bottom: 20px;
    background-color: black;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    color: white;
    text-decoration: none;
}

.category-item:focus,
.category-item:hover {
    color: white;
    text-decoration: none;
}

.category-item span {
    color: #00adb5;
}

.category-item p {
    text-align: center;
}

.category-item img {
    width: 300px;
    height: 300px;
    border-radius: 10%;
    margin: 30px;
}

.category-item.odd {
    background-color: white;
    color: black;
}

.category-item h3 {
    font-size: 36px;
    text-align: center;
}

.category-item p {
    font-size: 24px;
}

.category-item span {
    font-size: 26px;
}

.icon {
    width: 45px;
    height: 45px;
    background-color: white;
    border-radius: 50%;
    padding: 2px;
    -webkit-transition: all .2s ease-in-out;
    transition: all .2s ease-in-out;
}

.icon:hover {
    -webkit-transform: scale(1.1);
    transform: scale(1.1);
}

.phone-icon {
    fill: #19D33E;
}

.social-button {
    position: fixed;
    bottom: 10px;
    right: 10px;
    width: 50px;
    height: 50px;
    cursor: pointer;
    z-index: 4;
}

  .social-dropdown {
    max-width: 75px;
    width: 100%;
    height: 210px;
    padding: 0;
    overflow: hidden;
    display: -webkit-box;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
            flex-direction: column;
    -webkit-box-pack: start;
            justify-content: flex-start;
    -webkit-box-align: center;
            align-items: center;
    position: fixed;
    bottom: 0px;
    right: -100vh;
    -webkit-transition: all 300ms ease-in-out;
    transition: all 300ms ease-in-out;
    z-index: 3;
}

.social-dropdown a {
    padding-top: 3px;
}

.active-social {
    right: 0px;
}

.up {
    position: fixed;
    bottom: 10px;
    left: 10px;
    width: 50px;
    height: 50px;
    cursor: pointer;
    z-index: 4;
  }

  .arrow-icon {
    width: 45px;
    height: 45px;
    fill: #00a2f2;
  }

  .logo {
      background-image: url('assets/img/logo.svg');
      height: 70px;
      width: 120px;
      background-repeat: no-repeat;
      background-position: center;
      background-size: 170px 130px;
  }

  .nav-link {
      text-align: center;
      padding: 20px;
      margin-right: 10px;
      font-size: 20px;
      color: black !important;
  }

  .navbar-brand {
      display: flex;
      align-items:center;
    padding-top: 0;
    padding-bottom: 0;
}

  .navbar-brand.mobile {
      display: none;
  }

  .logo-link {
    font-size: 20px;
    display: flex;
    width: 150px;
    height: 70px;
    flex-direction: column;
    line-height: 1.2;

}

  @media screen and (max-width: 480px) {

    .nav-link,
    .dropdown {
        border-top: 1px solid white;
    }

    .logo-link {
        font-size: 14px;
        display: inline-block;
    }

    .navbar-brand {
        display: none;
        padding-top: 0;
        padding-bottom: 0;
    }

    .navbar-brand.mobile {
        display: block;
    }
  }

  .about {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-around;

  }

  .about-wrapper {
      display: flex;
      width: 45%;
      flex-wrap: wrap;
  }

  @media screen and (max-width: 480px) {
    .about-wrapper{
        width: 100%;

    }

    .about-wrapper-img-1{
        display: none;
    }

    .about-wrapper-img-2{
        margin-top: 20px;
        margin-bottom: 20px;
    }

    .category.main-page {
        margin-top: 50px;
    }

  }



  .about-wrapper-img-1 {
      background-image: url('assets/img/River-Reservoirs.jpg');
      background-size: cover;
      background-repeat: no-repeat;
      background-position: center;
      height: 400px;
  }

  .about-wrapper-img-2 {
    background-image: url('assets/img/reservuar.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    height: 400px;
}

.about-wrapper-img-3 {
    background-image: url('assets/img/geomembrana-dlya-bytovyh-i-promyshlennyh-othodov.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    height: 25vw;
    width: 100%;
}

.about-wrapper-img-4 {
    background-image: url('assets/img/geomembrana-dlya-poligona-tbo.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    height: 25vw;
    width: 100%;
}

footer {
    width: 100%;
    background-color: black;
    display: flex;
    align-items: center;
    color: white;
    height: auto;
    padding: 20px;
    flex-wrap: wrap;
}

footer p {
    width: 100%;
    text-align: center;
}

footer a {
    color: white;
}

.italic {
    font-style: italic;
}

button.dropdown-toggle {
    background-color: transparent;
    border: none;
}

.dropdown-menu {
    background-color: #B5EAEA;
}

.dropdown {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.navbar {
    padding-top: 0;
    padding-bottom: 0;
    background-color: #B5EAEA !important;
}

.dropdown-menu .nav-link:hover {
    background-color: #2bb1b1;
}

.header-contacts {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

@media screen and (max-width: 480px) {
    .header-contacts {
        display: none;
    }
}

.header-contacts p, a {
    margin: 0;
    padding: 0;
    color: black;
}

.navbar-toggler-icon {
    color: black;
}



.navbar-brand.mobile .logo {
    height: 50px;
    width: 100px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: 120px 90px;
}

.navbar-brand.mobile .logo-link {
    display: flex;
    height: auto;
}

@media screen and (max-width: 480px) {
    .header-contacts {
        display: none;
    }
    .navbar-brand.mobile {
        width: 70%;
        display: flex;
    }
}

.mob-only {
    display: none;
}

@media screen and (max-width: 480px) {
    .mob-only {
        display: block;
    }
}