* styles.css */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

header {
    background: #333;
    color: #fff;
    padding: 1em 0;
}

nav ul {
    display: flex;
    list-style: none;
    justify-content: center;
    padding: 0;
    margin: 0;
}

nav ul li {
    margin: 0 15px;
    position: relative;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu {
    display: none;
    position: absolute;
    background: #444;
    list-style: none;
    padding: 10px 0;
    margin: 0;
    top: 100%;
    left: 0;
}

.dropdown-menu li a {
    color: #fff;
    padding: 10px 20px;
    display: block;
    text-decoration: none;
}

main {
    padding: 2em;
    background: #f4f4f4;
    min-height: 80vh;
}

footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 1em 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: #fff;
    text-align: left;
}

table th, table td {
    padding: 10px;
    border: 1px solid #ddd;
}

table th {
    background: #333;
    color: #fff;
}