style.css

/* Base styles */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  font-size: 16px;
  background-color: #f5f5f5;
}

/* Top navigation */
.topnav {
  overflow: hidden;
  background-color: #e9e9e9;
  display: flex;
  justify-content: center;
}

.topnav a {
  float: left;
  display: block;
  color: black;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.topnav a.active {
  background-color: #2196f3;
  color: white;
}

.topnav .search-container {
  display: flex;
  justify-content: center;
}

.topnav input[type="text"] {
  padding: 6px;
  margin-top: 8px;
  margin-right: 10px;
  font-size: 17px;
  border: none;
  border-radius: 14px;
}

.topnav .search-container button {
  float: right;
  padding: 6px 10px;
  margin-top: 8px;
  margin-right: 20px;
  background: #ddd;
  font-size: 17px;
  border: none;
  cursor: pointer;
  border-radius: 10px;
}

.topnav .search-container button:hover {
  background: #ccc;
}

@media screen and (max-width: 600px) {
  .topnav .search-container {
    float: none;
  }
  .topnav a,
  .topnav input[type="text"],
  .topnav .search-container button {
    float: none;
    display: block;
    text-align: left;
    width: 100%;
    margin: 0;
    padding: 14px;
  }
  .topnav input[type="text"] {
    border: 1px solid #ccc;
  }
}

/* Main container */
#main-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.story {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 25%;
  margin: 16px;
  text-align: center;
  border: groove;
  border-radius: 15px;
  padding: 5px 5px 5px 5px;
}

.story img {
  width: 100%;
  height: auto;
  border-radius: 15px;
  margin-bottom: 16px;
}

.story a {
  color: #333;
  text-decoration: none;
  font-size: 14px;
}

@media screen and (max-width: 600px) {
  .topnav a,
  .topnav input[type="text"] {
    float: none;
    display: block;
    text-align: left;
    width: 100%;
    margin: 0;
    padding: 14px;
  }
  .topnav input[type="text"] {
    border: 1px solid #ccc;
  }
}