* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
}

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

.container {
    display: flex;
    max-width: 1200px;
    margin: 20px auto;
}

.sidebar1, .sidebar2 {
    width: 20%;
    padding: 15px;
    background-color: #ddd;
}

.sidebar1 ul, .sidebar2 ul {
    list-style-type: none;
}

.sidebar1 ul li, .sidebar2 ul li {
    margin: 10px 0;
}

.sidebar1 ul li a {
    text-decoration: none;
    color: #333;
}

article {
    width: 60%;
    padding: 15px;
    background-color: #fff;
    border: 1px solid #ccc;
}

article h2 {
    margin-bottom: 10px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

table, th, td {
    border: 1px solid #333;
}

th, td {
    padding: 10px;
    text-align: left;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1em;
    margin-top: 20px;
}