@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@200;300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Gabarito:wght@700&family=Roboto+Mono:wght@700&family=Roboto:ital,wght@1,300&family=Sometype+Mono&family=Source+Code+Pro&display=swap');
*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
  user-select: none;
  scroll-behavior: smooth;
}

body {
    background-image: url('background.png');
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: center top;
    color: white;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

.iconnav {
  width: 60px;
  height: 60px;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  height: 80px;
  padding: 0 50px 0 30px;
}

.header::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: rgb(0, 0, 0, .1);
  backdrop-filter: blur(50px);
  top: 0;
  left: 0;
  z-index: -1;
}

.header::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: -100%;
}


.navbar a {
  font-size: 20px;
  text-decoration: none;
  color: white;
  margin-left: 2em;
}

.check {
  display: none;
}

.icon {
  font-size: 40px;
  color: white;
  cursor: pointer;
  display: none;
  position: absolute;
  right: 3%;
}

.icon #close {
  display: none;
}

@media (max-width: 768px) {
  .icon {
      display: inline-flex;
  }

  .navbar {
      position: absolute;
      top: 100%;
      left: 0;
      width: 100%;
      height: 0;
      background-color: rgb(0, 0, 0, .1);
      backdrop-filter: blur(50px);
      transition: 0.5s ease;
      overflow: hidden;
  }

  .navbar a {
      display: block;
      margin: 20px;
      text-align: center;
  }

  #check:checked~.icon #open {
      display: none;
  }

  #check:checked~.icon #close {
      display: block;
  }

  #check:checked~.navbar {
      height: 220px;
  }

}

.containerfilesmain {
  justify-content: space-evenly;
  flex-direction: row;
  padding-top: 200px;
  max-width: 1500px;
  width: auto;
  height: auto;
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 5em;
  padding-bottom: 150px;
  order: sortable;
}

.item {
  background: rgba(0, 0, 0, 0.32);
  border-radius: 16px;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10.1px);
  -webkit-backdrop-filter: blur(10.1px);
  border: 2px solid rgba(0, 0, 0, 0.3);
  width: 300px;
  order: sortable;
  height: 350px;
  text-align: center;
  justify-content: center;
  transition: transform 0.3s ease;
  align-self: flex-start;
}

.item:hover {
  transform: scale(1.05);
}


.header1 {
  font-size: 40px;
}


.downloadbutton {
  width: 250px;
  height: 50px;
  margin-top: 20px;
  border: 2px solid transparent;
  border-radius: 6px;
  transition: transform 0.3s ease;
  background-color: transparent;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(11.6px);
  -webkit-backdrop-filter: blur(11.6px);
  color: white;
  font-size: 25px;
}
.navbar a button {
  padding: 10px;
  background: transparent;
  width: auto;
  height: auto;
  color: white;
  border: 2px solid #9c9c9c;
  cursor: pointer;
  font-size: 20px;
  border-radius: 10px;
}

.downloadbutton:hover {
  transform: scale(1.05);
}


.descfiles {
  margin-top: 20px;
  height: 100px;
  display: block;
  overflow: hidden;
}

.osfiles {
  margin-top: 30px;
}

.osfiles1 {
  margin-top: 50px;
} 

footer {
  background: rgba(137, 137, 137, 0.29);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(9.5px);
  -webkit-backdrop-filter: blur(9.5px);
  bottom: 0;
  position: fixed;
  width: 100%;
  text-align: center;
  justify-content: center;
  padding: 10px;
  opacity: 1;
  transition: opacity 0.5s ease-in-out;
}

.close-btn {
  position: absolute;
  top: -5px;
  right: 10px;
  cursor: pointer;
  font-size: 1.2rem;
}

.headerdiv {
  padding-top: 100px;
  margin-bottom: -100px;
  justify-content: center;
  text-align: center;
}

.header1files {
  font-size: 50px;
}

#one {
  padding-top: 100px;
  margin-bottom: -100px;
  justify-content: center;
  text-align: center;
}

.przedzialek {
  margin-top: 100px;
  margin-bottom: -30px;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
}

@media (max-width: 940px) {
  .menu-btn {
    display: block;
  }


}

.menu-btn {
  display: none;
  position: absolute;
}

.descfiles1 {
  margin-top: 20px;
  height: 180px;
  display: block;
  overflow: hidden;
}

.descfiles1 li {
  margin-left: 40px;
  text-align: left;
}


.notes {
  text-align: center;
}

footer {
  background-color: black;
  height: auto;
  max-height: 500px;
  width: 100%;
  bottom: 0;
  padding: 20px;
}

footer ul {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  list-style: none;
  order: sortable;
  justify-content: center;
  text-align: center;
  flex-wrap: wrap;
  align-content: flex-start;
}

footer ul li {
  margin: 10px;
}

footer ul li a {
  color: #f2f2f2;
  text-decoration: none;
  font-size: 30px;
  font-weight: 500;
  padding: 8px 15px;
  border-radius: 5px;
  letter-spacing: 1px;
  transition: all 0.3s ease;
}

footer ul li a.active,
footer ul li a:hover{
color: #111;
background: #fff;
}

.footerbox {
  display: block;
  width: 100%;
  height: 100%;
}

.footericons {
  display: block;
}

.footertext {
  height: auto;
  padding: 20px 5px 5px 5px;
  color: white;
  font-size: 15px;
  width: 100%;
  display: block;
  overflow: hidden;
  word-wrap: break-word;
  text-align: center;
}