* {
  padding: 0;
  margin: 0;
}
.parent:first-of-type {
  background: url("images/pos.jpg") no-repeat center center fixed;
  background-size: cover;
  position: relative;
}

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 1); /* Adjust the opacity as needed */
}

.parent:nth-of-type(2),
.parent:nth-of-type(3),
.parent:nth-of-type(4),
.parent:last-of-type {
  background: #ffffff url("images/pos.jpg") no-repeat center center fixed;
  background-size: cover;
}

.parent {
    width: 100%;
    height: 150vh;
    color: #fff;
    text-shadow: 0 0 5px #000;
    font-family: tahoma;
    text-align: center;
    line-height: 180%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}


.parent .left-column,
.parent .right-column {
  flex: 1;
  padding: 20px;
}
.parent .left-column {
}
.parent .right-column {
}
.parent h1 {
  text-align: center;
  margin-bottom: 20px;
}
.parent p {
  padding: 25px;
}
.demo-btn {
  display: inline-block;
  padding: 10px 20px;
  background-color: #11caa2;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
  transition: background-color 0.3s ease;
}
.demo-btn:hover {
  background-color: #0a8566;
}
/* navbar styling */
nav {
  position: fixed;
  width: 100%;
  padding: 20px 0;
  z-index: 998;
  transition: all 0.3s ease;
  font-family: 'Ubuntu', sans-serif;
}
nav.sticky {
  background: #4070f4;
  padding: 13px 0;
}
nav .navbar {
  width: 90%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: auto;
}
nav .navbar .logo a {
  font-weight: 500;
  font-size: 35px;
  color: #ffffff;
}
nav.sticky .navbar .logo a {
  color: #fff;
}
nav .navbar .menu {
  display: flex;
  position: relative;
}
nav .navbar .menu li {
  list-style: none;
  margin: 0 8px;
}
.navbar .menu a {
  font-size: 18px;
  font-weight: 500;
  color: #ffffff;
  padding: 6px 0;
  transition: all 0.4s ease;
}
.navbar .menu a:hover {
  color: #1ff0e2;
}
nav.sticky .menu a {
  color: #FFF;
}
nav.sticky .menu a:hover {
  color: #0E2431;
}
.navbar .media-icons a {
  color: #eeeeee;
  font-size: 18px;
  margin: 0 6px;
}
nav.sticky .media-icons a {
  color: #FFF;
}
/* Side Navigation Menu Button CSS */
nav .menu-btn,
.navbar .menu .cancel-btn {
  position: absolute;
  color: #fff;
  right: 30px;
  top: 20px;
  font-size: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
  display: none;
}
nav .menu-btn {
  color: #4070f4;
}
nav.sticky .menu-btn {
  color: #FFF;
}
.navbar .menu .menu-btn {
  color: #fff;
}
.item {
  width: 300px;
  height: auto;
  margin-bottom: 20px;
}
/* CSS for tablets */
@media (max-width: 768px) {
  .item {
    width: 250px;
  }
}
/* CSS for mobile devices */
@media (max-width: 480px) {
  .item {
    width: 200px;
  }
}