body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            margin: 0;
            padding: 0;
            background-color: #f0f0f0;
            flex: auto;
        }
        .container {
            width: 80%;
            margin: auto;
            overflow: hidden;
        }
        header {
            background: #4CAF50;
            color: white;
            padding-top: 30px;
            min-height: 70px;
            border-bottom: #e8491d 3px solid;
        }
        header a {
            color: #ffffff;
            text-decoration: none;
            text-transform: uppercase;
            font-size: 20px;
        }
        header li {
            float: left;
            display: inline;
            padding: 0 5px 0 15px;
        }
        header #branding {
            float: left;
        }
        header #branding h1 {
            margin: 0;
        }
        header nav {
            float: right;
            margin-top: 0px;
            align-content: center;
        }
        header .highlight, header .current a {
            color: #ff3700;
            font-weight: bold;
        }
        header a:hover {
            color: #ffffff;
            font-weight: bold;
        }
        #showcase {
            min-height: 400px;
            background: url('https://source.unsplash.com/1600x900/?recycling') no-repeat center center/cover;
            text-align: center;
            color: #ffffff;
        }
        #showcase h1 {
            margin-top: 100px;
            font-size: 55px;
            margin-bottom: 10px;
        }
        #showcase p {
            font-size: 20px;
        }
        #recycling-ai {
            padding: 15px;
            background: #ffffff;
            margin-top: 20px;
            border-radius: 5px;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
        }
        #recycling-ai h2 {
            color: #4CAF50;
        }
        #recycling-ai input[type="text"] {
            width: 70%;
            padding: 10px;
            margin-right: 10px;
        }
        #recycling-ai button {
            padding: 10px 20px;
            background: #4CAF50;
            color: #ffffff;
            border: none;
            cursor: pointer;
        }
        #recycling-ai button:hover {
            background: #45a049;
        }
        #result {
            margin-top: 20px;
            padding: 15px;
            background: #e7f3e8;
            border-radius: 5px;
        }
        footer {
            padding: 20px;
            margin-top: 20px;
            color: #ffffff;
            background-color: #4CAF50;
            text-align: center;
        }