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

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


header {background-image: url('stars.jpg');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 20px;
    text-align: center;}

header h2, header p {color: white;}


main {display: flex;
    width: 100%;}

nav a {color: white;
    text-decoration: none;
    display: block;
    padding: 8px;
    transition: background-color 0.3s;}
	
nav a:hover {background-color: blue;}  

nav {background-color: #008080;
    width: 25%; 
    padding: 20px;
    order: 1;}

nav ul {list-style-type: none;}




nav li {margin-bottom: 10px;}

.column {flex: 1;
    padding: 20px;
    border: 1px solid #ccc;}

.content {width: 75%; 
    padding: 20px;
    order: 2; }



.content p {margin-bottom: 15px;}


.columns {display: flex;
    width: 100%;
    background-color: lightblue;}

.content h1 {margin-bottom: 15px;}


.column h3 {margin-bottom: 10px;}


footer {background-color: darkblue;
    color: white;
    text-align: center;
    padding: 20px;
    clear: both;}