app/static/header_file.css

body {
  margin: 0;
  text-align: left;  
  font-family: 'Roboto', sans-serif; /* More modern font choice */
}

.topnav {
  overflow: hidden;
  background-color: #007bff;
}

.topnav a {
  float: left;
  display: block;
  color: white;
  text-align: center;
  padding: 16px 20px; /* Increased padding for a more spacious look */
  text-decoration: none;
  font-size: 17px;
  margin-right: 15px;
  transition: background-color 0.3s ease; /* Adding transition */
}

.topnav a:hover {
  background-color: black;  /* Black with low opacity */
  color: white; /* Cleaner contrast */
}

.topnav a.active {
  color: white;
}

/* Responsive Design */
@media screen and (max-width: 600px) {
  .topnav a:not(:first-child) { display: none; }
  .topnav a.icon {
    float: right;
    display: block;
    font-size: 24px; /* Larger icon for better visibility */
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive { position: relative; }
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}


  .alert {
    padding: 20px;
    background-color: #f44336;
    color: black;
  }
  
  .closebtn {
    margin-left: 15px;
    color: white;
    font-weight: bold;
    float: right;
    font-size: 22px;
    line-height: 20px;
    cursor: pointer;
    transition: 0.3s;
  }
  
  .closebtn:hover {
    color: black;
  }