/* basic layout */
body {
    font-family: "Open Sans", sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
  }
/* header */
header {
    background-color: #003366;
    color: #fff;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  header h1 {
    margin: 0;
    font-size: 2rem;
    font-weight: bold;
  }
  
  header nav {
    display: flex;
  }
  
  header nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
  }
  
  header nav ul li {
    margin: 0 1rem;
  }
  
  header nav ul li a {
    color: #fff;
    text-decoration: none;
    font-size: 1.2rem;
  }
  
  header nav ul li a:hover {
    color: #ccc;
  }
  
  /* main content */
  main {
    margin: 0 auto;
    max-width: 1200px;
    padding: 1rem;
  }
  /* header */
  h1 {
    text-align: center;
    margin: 2rem 0;
  }
  
  /* search box */
  #search-input {
    padding: 0.5rem;
    font-size: 1.2rem;
    margin-right: 1rem;
  }
  
  #search-button {
    padding: 0.5rem 1rem;
    font-size: 1.2rem;
    background-color: #003366;
    color: #fff;
    border: none;
  }
  
  #search-button:hover {
    background-color: #ccc;
  }
  
  /* album table */
  table {
    width: 100%;
    border-collapse: collapse;
  }
  
  th {
    background-color: #003366;
    color: #fff;
    padding: 0.5rem;
    text-align: left;
  }
  
  td {
    border: 1px solid #ccc;
    padding: 0.5rem;
  }
  
  /* table row hover effect */
  tr:hover {
    background-color: #f5f5f5;
  }
  
  /* table sort icon */
  th[data-sort]:after {
    content: "";
    float: right;
    margin-top: 5px;
    border-color: #fff transparent transparent;
    border-style: solid;
    border-width: 0 4px 4px;
  }
  
  th[data-sort]:hover:after {
    border-bottom-color: #fff;
  }
  
  th[data-sort="asc"]:after {
    border-bottom-color: #fff;
    margin-top: -4px;
  }
  /* footer */
  footer {
    background-color: #003366;
    color: #fff;
    padding: 1rem;
    text-align: center;
  }
  
  footer p {
    font-size: 1.2rem;
  }
  
  /* media queries */
  @media (max-width: 600px) {
    header nav {
      flex-wrap: wrap;
    }
    
    header nav ul {
      justify-content: center;
    }
}