.container{
  margin: 0 auto;
}
.grid-container{
  display: grid;
  justify-items: center;
  align-items: center;
  grid-template-columns: 25% 25% 25% 25%;
  /* grid-auto-rows: minmax(150px, auto); */
  max-width: 100vw;
}
.grid-photo{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
  justify-items: center;
  
}
.item-1{
  grid-column-start: 1;
  grid-column-end: 3;
  align-self: start;
}
.item-2{
  grid-column-start: 4;
  grid-column-end: 4;
}
.item-3{
  grid-column-start: 2;
  grid-column-end: 5;
  padding-right: 20px;
}
.item-4{
  grid-column-start: 1;
  grid-column-end: 1;
  justify-self: center;
}
.item-5{
  /* grid-column-start: 4; */
  grid-column-end: 4;
  align-self: end;
}
.item-6{
  grid-column-start: 1;
  justify-self: center;
}
.item-7{
  grid-column-start: 1;
  grid-column-end: -1;
}

.responsive .item-5{
  grid-column-end: 5;
}
.responsive .item{
  grid-column-start: 1;
  grid-column-end: -1
}
.item-8, .item-9, .item-12, .item-13, .item-14{
  grid-column-start: 1;
  grid-column-end: -1;
}
.item-10, .item-11{
  grid-column-start: 1;
  grid-column-end: -1;
}
.prev, .next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  margin-top: -22px;
  padding: 16px;
  color: white;
  font-weight: bold;
  font-size: 18px;
  transition: 0.6s ease;
  border-radius: 0 3px 3px 0;
  user-select: none;
}
.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}
@media (min-width: 600px){
  .container{
    margin: 0 auto;
    padding: 0 10%;
  }
  .item-3{
    grid-column-start: 2;
    grid-column-end: 4.5;
  }
  .item-8{
  grid-column-start: 1;
  grid-column-end: 3;
}
.item-9{
  grid-column-start: 3;
  grid-column-end: 5;
}
.next {
  right: 10%;
  border-radius: 3px 0 0 3px;
}
}
@media (min-width: 900px){
  .item-1{
    grid-column-start: 1;
    grid-column-end: 2;
  }
  .item-2{
    grid-column-start: 3;
    grid-column-end: 5;
  }
  .hamburger-checkbox{
    display: none;
  }
  .item-6{
    grid-column-start: 1;
    justify-self: end;
  }
  .item-10{
    grid-column-start: 1;
    grid-column-end: 3;
  }
  .item-11{
    grid-column-start: 3;
    grid-column-end: 5;
  }
  .item-12{
    grid-column-start: 1;
  }
}
@media (min-width: 1400px){
  .container{
    max-width: 1920px;
  }
  .grid-container, .grid-photo{
    max-width: 1400px;
    margin: 0 auto;
  }
}
body {
  font-family: 'Roboto', sans-serif;
    overflow-x: hidden;
    
}
svg{
  display: block;
}
h1{
    font-size: 2rem!important;
    text-align: center;
    font-weight: 500;
}
h2{
  font-size: 1.7rem!important;
  font-weight: 500;
}
h3{
  font-size: 1.4rem!important;
  font-weight: 500;
}
ul{
  padding-left: 2rem;
}
ul li{
  padding: 8px 0;
}

.background-grey{
    background-color: #F0F0F0;

}
.underline{
  background-color: #009DDF;
  height: 1px;
  width: 60%;
  margin-left: 20%;
  margin-right: 20%;
  margin-top: 20px;
}
header{
  height: 90px;
  width: 100%;
  position: fixed;
  z-index: 1000;
  background-color: #fff;
}
header img{
    max-height: 90px;
    width: auto;
}
.topnav {
    overflow: hidden;
  }
  
  .topnav a {
    
    display: block;
    color: black;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
  }
  .responsive .menu__item::after{
    content: '';
    display: block;
    height: 1px; 
    width: 70vw;
    margin: 20px 15vw; 
    background-color: #ffffffa1;
  }
  .topnav a:hover {
    color: #009DDF;
  }
  .topnav .icon {
    display: none;
  }
  
  @media screen and (max-width: 900px) {
    .topnav a {display: none;}
    .topnav a.icon {
      display: block;
    }
    .topnav a .bi-x{
      display: none;
    }
    .topnav .break__line{
      display: none;
    }
    .topnav.responsive {
      position: absolute;
      right: 0;
      top: 0;
      background: linear-gradient(45deg, #009DDF 0%, #797979 100%);
      width: 100vw;
      height: 100vh;
      z-index: 999;
      padding-top: 50px;
    }
    .topnav.responsive a .bi-x{
      display: block;
    }
    .topnav.responsive a .bi-list{
      display: none;
    }
    
    .topnav.responsive .icon {
      position: absolute;
      right: 0;
      top: 0;
    }
    .topnav.responsive a {
      float: none;
      display: block;
      text-align: center;
      color: #fff;
    }
    .topnav.responsive .break__line{
      display: block;
      height: 0.7px; 
      width: 70vw;
      margin: 10px 15vw; 
      background-color: #ffffffa1;
    }
  }
  
  .banner{
    background-color: #009DDF;
    position: relative;
    padding-top: 90px;
  }
  .advantages{
    padding-bottom: 150px;
  }
  .advantages__numbers{
    background-color: #fff;
    position: relative;
    padding: 50px 20px;
    margin-top: -50px;
    z-index: 100;
  }
  
  .divices__table{
    background-color: #fff;
  }
  #paralax1 {
    /* The image used */
    background-image: url("../assets/stal-nierdzewna.jpg");
  
    /* Set a specific height */
    min-height: 500px;
  
    /* Create the parallax scrolling effect */
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
  }

  #shadow{
    width: 100%;
  height: 100%;
  position: absolute;
  margin: 0;
  top: 0;
  left: 0;
  background-color: #00000048;
  }
#animated-background {
  width: 100%;
  height: 100%;
  position: absolute;
  margin: 0;
  top: 0;
  left: 0;
  background: #a8a8a8 url(../assets/konstrukcja-stalowa.jpg);
  background-repeat: repeat;
  background-position: center center;
  background-size: auto;
/*adjust s value for speed*/
 animation: animatedBackground 50s linear infinite;
}

@keyframes animatedBackground {
  0%{
    background-position: center center;
  }
  25%{
    background-position: right center;
  }
  50% {
    background-position: center center;
  }
  75% {
    background-position: left center;
  }
  100% {
    background-position: center center;
  }
}
/* element */

.element {
  height: 45px;
  width: 30px;
  background: transparent;
  border: 2px solid #000000;
  border-radius: 15px;
  position: absolute;
  left: 50%;
  transform: translate(-50%, 0);
  text-align: center;
}

.element-bottom {
  bottom: 67.5px;
  -webkit-animation: bottom .6s infinite;
  /* Safari 4.0 - 8.0 */
  -webkit-animation-direction: alternate;
  /* Safari 4.0 - 8.0 */
  -webkit-animation-delay: 1.2s;
  /* Safari 4.0 - 8.0 */
  animation: bottom .6s infinite;
  animation-direction: alternate;
  animation-delay: 1.2s;
}

/* Safari 4.0 - 8.0 */

@-webkit-keyframes bottom {
  0% {
    bottom: 28px;
  }
  25% {
    bottom: 25px;
  }
  50% {
    bottom: 22px;
  }
  75% {
    bottom: 19px;
  }
  100% {
    bottom: 16px;
  }
}

/* Standard syntax */

@keyframes bottom {
  0% {
    bottom: 28px;
  }
  25% {
    bottom: 25px;
  }
  50% {
    bottom: 22px;
  }
  75% {
    bottom: 19px;
  }
  100% {
    bottom: 16px;
  }
}

.element span {
  display: inline-block;
  background:#009fe3;
  height: 10px;
  width: 2px;
  border-radius: 1px;
  position: relative;
  top: 5px;
}

.element i {
  border: solid #009fe3;
  border-width: 0 2px 2px 0;
  display: inline-block;
  padding: 5px;
  position: absolute;
  bottom: -15px;
  left: 7px;
}

.down {
  transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
}
  .devices__title{
    padding: 50px 0 0 50px;
    color: #fff; 
    font-size: 1.2rem; 
    text-transform: uppercase;
    font-weight: 800;
  }
  .devices__title__small{
    color: #fff; 
    font-size: 1rem; 
    text-transform: uppercase;
    font-weight: 800;
    padding-left: 50px;
  } 
  .container__box{
    background-color: #fff; 
    margin: 50px 20px; 
    position: relative; 
  }
  .device__box{
    padding: 20px; 
    background-color: #fff; z-index: 1; position: relative;
  }
  .background__border{
    position: absolute; 
    width: 100%; 
    height: 100%; 
    border: 10px solid #009DDF; 
    z-index: 0; 
    top: 20px; 
    right: 15px
  }
  .devices__table th, .devices__table td{
    padding: 5px 8px;
    border-left: 1px solid rgb(207, 206, 206);
    border-right: 1px solid rgb(207, 206, 206);
  }
  .devices__table th, .devices__table td:not(.table__row__name){
    text-align: center;
  }
  .devices__table tr{
    border-bottom: 1px solid rgb(207, 206, 206);
  }
  .devices__table tr:first-of-type {
    border-top: 1px solid rgb(207, 206, 206);
  }
  .devices__table td svg{
    display: inline;
  }
  #show{
    background-color: #D9D9D9;
  }
  #show img{
    max-width: 100%;
  }
  .contact{
    background-color: #000000;
    color: #fff;
    padding: 50px 0 20px 0;
    text-align: center;
  }
  .c-form input, .c-form textarea {
    background-color: #fff;
    border-radius: 15px;
    padding: 10px;
    border: none;
    display: block;
    width: 80%;
    margin: 0 auto;
    margin-top: 10px;
    text-align: center;
    max-width: 500px;
    color: #666666;
  }
  
  .c-input-box {
    display: block;
    width: 80%;
    margin: 0 auto;
    margin-top: 10px;
    text-align: center;
    max-width: 500px;
  }
  
  .c-form input::placeholder {
    opacity: 0.7
  }
  
  .c-form input[type="checkbox"] {
    float: left;
    width: 25px!important;
    height: 20px
  }
  
  .c-form label {
    width: calc(100% - 40px);
    padding-top: 6px;
    text-align: justify
  }
  
  .c-form input.button {
    background-color: #2db5ef;
    color: #000000;
    width: 200px;
    -webkit-transition: all 300ms ease-in-out;
    -moz-transition: all 300ms ease-in-out;
    -ms-transition: all 300ms ease-in-out;
    -o-transition: all 300ms ease-in-out;
    transition: all 300ms ease-in-out;
  }
  
  .c-form input.button:hover {
    background-color: #3d6fac;
    color: #000000;
    width: 200px;
    letter-spacing: 2px;
  }
  .btn-buy{display:inline-block;
    text-decoration: none;
    background:#009fe3;padding:15px 20px; color: #000000;border:none; border-radius:20px;margin-bottom:30px;  -webkit-transition: all 300ms ease-in-out;
    -moz-transition: all 500ms ease-in-out;
    -ms-transition: all 500ms ease-in-out;
    -o-transition: all 500ms ease-in-out;
    transition: all 500ms ease-in-out;}
  .btn-buy:hover{text-decoration:none;color:#000000;background:rgb(11, 201, 27);letter-spacing: 1px;}
  .slide-top{
    position: fixed;
    overflow: hidden;
    z-index: 99999999;
    right: 30px;
    bottom: 30px;
  }

  @media (min-width: 630px){
    .header__devices p{
        font-size: 2rem;
        color: #fff;
        font-weight: 700;
        position: absolute;
        top: 71%;
        left: 50px;
      }
      .devices__title{
        font-size: 2rem; 
      }
      .devices__title__small{
        font-size: 1.5rem; 
      }
      .container__box{
        background-color: #fff; 
        margin: 100px 50px; 
        position: relative; 
      }
      .device__box{
        padding: 50px; background-color: #fff; z-index: 1; position: relative;
      }
      .background__border{
        top: 50px; 
        right: 50px
      }
  }
  @media (min-width: 1000px){
    .advantages__numbers{
        margin: 0 7vw;
        margin-top: -70px;
        padding: 50px 100px;
    
      }
      .header__devices p{
        font-size: 3rem;
        color: #fff;
        font-weight: 700;
        position: absolute;
        top: 56%;
        left: 100px;
      }
      .devices__title{
        font-size: 3rem; 
      }
      .devices__title__small{
        font-size: 2.5rem; 
      }
      
  }