body {
            background-color: purple;
            color: yellow;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0;
            padding: 20px;
            min-height: 100vh;
            box-sizing: border-box;
        }

        main {
            max-width: 400px;
            width: 100%;
            margin: 0 auto;
        }

        a.btn-home {
            border: 2px solid white;
            border-radius: 50%;
            position: fixed;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            opacity: .4;
            padding: 0.4rem;
            top: 1rem;
            left: 1rem;
            transition: all 0.46s ease-in;
            z-index: 100;
            background-color: rgba(0,0,0,0.3);
        }

        a.btn-home:hover {
            transform: scale(1.1);
            opacity: 1;
        }

        a.btn-home svg {
            width: 24px;
            height: 24px;
            fill: white;
        }

        main h1 {
            text-align: center;
            margin: 0 0 0.5rem 0;
            font-size: 2.5rem;
        }

        main > h4 {
            text-align: center;
            margin: 0 0 1rem 0;
            font-size: 1.2rem;
        }

        main > img {
            display: block;
            margin: 0 auto 2rem auto;
            max-width: 100%;
            height: auto;
            border-radius: 10px;
        }

        section {
            background-color: black;
            border-radius: 0.8rem;
            padding: 1rem;
            text-align: left;
            margin-bottom: 1.5rem;
            width: 100%;
            box-sizing: border-box;
            overflow: hidden;
        }

        section h2 {
            margin: 0 0 0.5rem 0;
            border-bottom: 2px solid yellow;
            padding-bottom: 0.4rem;
            font-size: 1.4rem;
        }

        section h4 {
            margin: 0.8rem 0 0.2rem 0;
            font-size: 1.1rem;
            color: #ff0;
        }

        section p {
            font-size: 1.2rem;
            padding: 0.3rem 0;
            margin: 0;
            font-family: monospace;
            background-color: #330;
            border-radius: 0.4rem;
            padding: 0.4rem;
        }

        section xmp {
            background-color: #1a1a1a;
            border-radius: 0.6rem;
            color: #0f0;
            margin: 0.5rem 0 0 0;
            font-size: 0.9rem;
            padding: 1rem;
            white-space: pre-wrap;
            word-wrap: break-word;
            font-family: 'Courier New', monospace;
            border: 1px solid #444;
            overflow-x: auto;
            max-width: 100%;
        }

        @media (max-width: 480px) {
            body {
                padding: 10px;
            }
            
            main {
                max-width: 100%;
            }
            
            section {
                padding: 0.8rem;
            }
            
            section h2 {
                font-size: 1.2rem;
            }
        }