:root {
        --nest: #19150f;
        --mouse: #ddd;
    }
    
    body a {
        color: var(--mouse);
        text-decoration: underline;
    }
    
    a:hover, a:active {
      color: white;
    }
    
    body {
        background-color: var(--nest);
        color: var(--mouse);
        font-family: 'Times New Roman', serif;
    }
    
    #flex {
        display: flex;
    }
    
    #container {
        max-width: 1000px;
        margin: 0 auto;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    header .line {
        font-weight: normal;
        font-size: 1.1rem;
        margin-left: 2em;
    }
    
    header {
        margin-bottom: 3em;
    }
    
    footer { 
        margin-top: 10em; 
    }
    
    .align-center { margin: 0 auto; }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.5rem; }
    h5 { font-size: 1.3rem; }
    h6 { font-size: 1.3rem; }
    p, nav a { font-size: 1.1rem; }
    
        #back {
        background: none;
        border: none;
        color: var(--mouse);
        font-family: 'Times New Roman', serif;
        font-size: 1.3rem;
        font-weight: bold;
        text-decoration: underline;
        margin-left: 10em;
    }
    #back:hover {
        cursor: pointer;
        color: white;
    }