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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
}


.container {
    width: 90%;
    max-width: 1200px;
    margin: 20px auto;
    border: 2px solid #333;
    
    background-image: url(../images/background.jpg);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}


header {
    width: 100%;
    padding: 20px;
    border: 1px solid #000000;
    margin-bottom: 10px;
    text-align: center;
}


nav {
    width: 100%;
    padding: 15px;
    border: 1px solid #000000;
    margin-bottom: 10px;
    display: block;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: space-around;
}

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


.main-content {
    width: 100%;
    display: block;
    margin-bottom: 10px;
    overflow: hidden;
}


.left-column {
    width: 65%;
    float: left;
}


section {
    width: 100%;
    padding: 20px;
    border: 1px solid #999;
    margin-bottom: 10px;
    display: block;
    min-height: 200px;
}


article {
    width: 100%;
    padding: 20px;
    border: 1px solid #999;
    display: block;
    min-height: 200px;
}


aside {
    width: 34%;
    float: right;
    padding: 20px;
    border: 1px solid #999;
    display: block;
    min-height: 410px; 
}


footer {
    width: 100%;
    padding: 20px;
    border: 1px solid #999;
    text-align: center;
    display: block;
    clear: both; 
}