body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}
header, footer {
    background-color: #333;
    color: #fff;
    padding: 1em;
    text-align: center;
}
h1 {
    margin: 0;
}
nav {
    display: flex;
    justify-content: center;
    background-color: #333;
}
nav a {
    padding: 14px 20px;
    text-decoration: none;
    color: white;
    text-align: center;
}
nav a:hover {
    background-color: #ddd;
    color: black;
}
main {
    padding: 2em;
    margin: 0 auto;
    max-width: 1200px;
    width: 90%;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    box-sizing: border-box;
}

figure {
    text-align: center;
}
figure img {
    max-width: 100%;
    height: auto;
}
figcaption {
    font-style: italic;
}
footer a {
    color: #fff;
    text-decoration: none;
}
.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    list-style: none;
    padding: 0;
    margin: 1em 0;
    gap: 0.5em;
}
.footer-links li {
    display: flex;
    align-items: center;
    padding: 0 0.5em;
    position: relative;
}
.footer-links li:not(:last-child)::after {
    content: "|";
    margin-left: 0.5em;
    color: #999;
}
.footer-credit {
    list-style: none;
    padding: 0;
    margin: 0.5em 0;
    text-align: center;
}
.footer-credit li {
    color: #ccc;
}
.footer-credit a {
    color: #fff;
    text-decoration: none;
}
@media screen and (min-width: 370px) and (max-width: 600px) {
    main {
        width: 95%;
    }
    nav {
        flex-direction: column;
    }
    nav a {
        padding: 10px;
    }
}
@media screen and (min-width: 601px) and (max-width: 980px) {
    main {
        width: 92%;
    }
    nav a {
        padding: 12px 18px;
    }
}
@media screen and (min-width: 981px) and (max-width: 1400px) {
    main {
        width: 90%;
    }
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5em 0;
  }
  
  th, td {
    border: 1px solid #ccc;
    padding: 0.75em;
    text-align: left;
  }
  
  thead tr {
    background-color: #444;
    color: white;
  }
  
  tbody tr:nth-child(odd) {
    background-color: #f9f9f9;
  }
  
  tbody tr:nth-child(even) {
    background-color: #e9e9e9;
  }
  .footer-validation {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1em;
    margin-top: 1em;
    flex-wrap: wrap;
  }
  
  .footer-validation img {
    height: auto;
    max-height: 64px;
    width: auto;
    border: none;
  }