/* Add this to styles.css */
body {
    margin: 0;
    padding: 0;
    display: flex;
    min-height: 100vh;
}

.left-nav {
    width: 250px;
    background: #1a1a1a;
    padding: 20px 0;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
}

.left-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.left-nav li {
    padding: 0;
}

.left-nav a {
    color: #f5f5f5;
    text-decoration: none;
    padding: 15px 25px;
    display: block;
    transition: background 0.3s;
}

.left-nav a:hover,
.left-nav a.active {
    background: #333;
}

main {
    margin-left: 250px;
    padding: 20px;
    flex: 1;
}