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

        body {
            font-family: 'Segoe UI', 'Malgun Gothic', sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            height: 100vh;
            width: 100vw;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 40px 60px;
            overflow: hidden;
        }

        .container {
            width: 100%;
            max-width: 1100px;
        }

        .header {
            text-align: center;
            margin-bottom: 50px;
            animation: fadeInDown 0.8s ease;
        }

        .header h1 {
            color: white;
            font-size: 3.5em;
            font-weight: 700;
            margin-bottom: 10px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
        }

        .header p {
            color: rgba(255,255,255,0.9);
            font-size: 1.4em;
            font-weight: 300;
        }

        .menu-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            animation: fadeInUp 0.8s ease;
        }

        .menu-card {
            background: white;
            border-radius: 20px;
            padding: 50px 30px;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
            text-decoration: none;
            color: inherit;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 280px;
        }

        .menu-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0,0,0,0.3);
        }

        .menu-card:active {
            transform: translateY(-5px);
        }

        .menu-icon {
            font-size: 5em;
            margin-bottom: 20px;
            display: block;
        }

        .menu-card h2 {
            font-size: 1.8em;
            color: #333;
            margin-bottom: 12px;
            font-weight: 600;
        }

        .menu-card p {
            color: #666;
            font-size: 1.1em;
            line-height: 1.6;
        }

        .recommend-card {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }

        .recommend-card h2,
        .recommend-card p {
            color: white;
        }

        .book-info-card {
            background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
        }

        .book-info-card h2,
        .book-info-card p {
            color: white;
        }

        .voice-card {
            background: linear-gradient(135deg,  #00f2fe 0%, #4facfe 100%);
        }

        .voice-card h2,
        .voice-card p {
            color: white;
        }

        .library-info-card {
            background: linear-gradient(135deg, #fee140 0%, #fa709a 100%);
        }

        .library-info-card h2,
        .library-info-card p {
            color: white;
        }

        .footer {
            text-align: center;
            margin-top: 40px;
            color: rgba(255,255,255,0.8);
            font-size: 1em;
        }

        @keyframes fadeInDown {
            from {
                opacity: 0;
                transform: translateY(-30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* 1205x750 태블릿 최적화 */
        @media (max-width: 1280px) and (min-width: 1024px) {
            body {
                padding: 40px 60px;
            }
            
            .header h1 {
                font-size: 3.5em;
            }
            
            .menu-grid {
                gap: 40px;
            }
        }

        /* 세로 모드 대응 */
        @media (max-width: 800px) {
            body {
                padding: 30px 40px;
            }

            .header h1 {
                font-size: 2.5em;
            }

            .header p {
                font-size: 1.1em;
            }

            .menu-grid {
                grid-template-columns: 1fr;
                gap: 25px;
            }

            .menu-card {
                padding: 35px 25px;
                min-height: 200px;
            }

            .menu-icon {
                font-size: 3.5em;
            }

            .menu-card h2 {
                font-size: 1.5em;
            }

            .menu-card p {
                font-size: 1em;
            }
        }