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

        body {
            font-family: 'Courier New', Courier, monospace;
            background-color: #f5f5f5;
            color: #333;
            line-height: 1.6;
            padding: 0;
            margin: 0;
        }

        #banner {
            background-color: #2c2c2c;
            color: #ffffff;
            padding: 2rem 1rem;
            text-align: center;
            border-bottom: 3px solid #000;
        }

        #banner h3 {
            font-size: 1.8rem;
            font-weight: normal;
            letter-spacing: 0.2rem;
            text-transform: uppercase;
        }

        #menu {
            background-color: #3a3a3a;
            padding: 1.5rem 1rem;
            text-align: center;
            border-bottom: 2px solid #000;
        }

        #menu h2 {
            font-size: 1rem;
            font-weight: normal;
            line-height: 2;
        }

        #menu a {
            color: #ffffff;
            text-decoration: none;
            transition: color 0.3s ease;
            display: inline-block;
        }

        #menu a:hover {
            color: #cccccc;
        }

        main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem 1rem;
        }

        h1 {
            font-size: 2rem;
            font-weight: normal;
            margin-bottom: 2rem;
            color: #2c2c2c;
            text-align: center;
            letter-spacing: 0.1rem;
        }

        article {
            background-color: #ffffff;
            padding: 2rem;
            margin-bottom: 2rem;
            border: 1px solid #ddd;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }

        article p {
            margin-bottom: 1rem;
            text-align: left;
        }

        article h2,
        article h3,
        article h4 {
            margin-top: 1.5rem;
            margin-bottom: 1rem;
            font-weight: normal;
            color: #2c2c2c;
        }

        .transition-section {
            background-color: #ffffff;
            padding: 2rem;
            margin-bottom: 2rem;
            border: 1px solid #ddd;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }

        .transition-section p {
            margin-bottom: 1rem;
        }

        .links-section {
            background-color: #ffffff;
            padding: 2rem;
            border: 1px solid #ddd;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }

        .links-section h3 {
            font-size: 1.3rem;
            font-weight: normal;
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: #2c2c2c;
            border-bottom: 1px solid #ddd;
            padding-bottom: 0.5rem;
        }

        .links-section h3:first-child {
            margin-top: 0;
        }

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 2rem;
            margin-bottom: 1.5rem;
        }

        .links-section li {
            margin-bottom: 0.5rem;
            break-inside: avoid;
        }

        .links-section a {
            color: #333;
            text-decoration: none;
            transition: color 0.3s ease;
            display: inline-block;
        }

        .links-section a:hover {
            color: #666;
            text-decoration: underline;
        }

        .links-section a::before {
            content: "→ ";
            margin-right: 0.3rem;
        }

        @media (max-width: 768px) {
            #banner h3 {
                font-size: 1.3rem;
                letter-spacing: 0.1rem;
            }

            #menu h2 {
                font-size: 0.9rem;
            }

            h1 {
                font-size: 1.5rem;
            }

            article,
            .transition-section,
            .links-section {
                padding: 1.5rem;
            }

            .links-section ul {
                column-count: 1;
            }

            main {
                padding: 1rem;
            }
        }

        @media (max-width: 480px) {
            #banner {
                padding: 1.5rem 0.5rem;
            }

            #banner h3 {
                font-size: 1.1rem;
            }

            #menu {
                padding: 1rem 0.5rem;
            }

            article,
            .transition-section,
            .links-section {
                padding: 1rem;
            }
        }