body {
    margin: 0;
    font-family: Arial, sans-serif;
    display: grid;
    grid-template-rows: auto 1fr auto;
    grid-template-columns: 250px 1fr;
    grid-template-areas:
        "header header"
        "sidebar main"
        "footer footer";
    height: 100vh;
    background-color: #f4f4f4;
}

.header {
    grid-area: header;
    background-color: #171718;
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header .logo h1 {
    margin: 0;
    font-size: 1.8rem;
}

.top-nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
    margin: 0;
    padding: 0;
}

.top-nav ul li a {
    text-decoration: none;
    color: white;
    font-weight: bold;
    transition: color 0.3s;
}

.top-nav ul li a:hover {
    color: #ffcc00;
}

.sidebar {
    grid-area: sidebar;
    background-color: #eeeeee;
    padding: 20px;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
}

.sidebar ul {
    list-style-type: none;
    padding: 0;
}

.sidebar ul li {
    margin: 15px 0;
}

.sidebar ul li a {
    text-decoration: none;
    color: #000;
    padding: 10px;
    display: block;
    border-radius: 5px;
    transition: background-color 0.3s, color 0.3s;
}

.sidebar ul li a.active {
    background-color: #171718;
    color: white;
}

.sidebar ul li a:hover {
    background-color: #d3d3d3;
    color: #171718;
}

.main-content {
    grid-area: main;
    padding: 30px;
    background-color: #ffffff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

.main-content h2 {
    color: #171718;
    font-size: 2rem;
    margin-bottom: 15px;
}

.main-content p {
    font-size: 1.1rem;
    color: #333;
    line-height: 1.6;
}

.footer {
    grid-area: footer;
    background-color: #171718;
    color: white;
    text-align: center;
    padding: 20px;
}

.footer nav a {
    color: white;
    text-decoration: none;
    margin: 0 10px;
    font-weight: bold;
    transition: color 0.3s;
}

.footer nav a:hover {
    color: #ffcc00;
}