* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            user-select: none;
        }

        body {
            background: #d9c8a9;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: 'Segoe UI', 'Book Antiqua', 'Georgia', serif;
            padding: 24px;
            margin: 0;
        }

        .book-container {
            max-width: 1300px;
            width: 100%;
            background: #fdf8ed;
            border-radius: 16px;
            box-shadow: 0 25px 45px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(255, 245, 215, 0.6) inset;
            padding: 20px 16px 20px 16px;
            transition: all 0.2s;
        }

        .book-pages {
            display: flex;
            flex-wrap: nowrap;
            gap: 24px;
            justify-content: center;
            align-items: stretch;
        }

        .page {
            flex: 1;
            background: #fffef7;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08), 0 1px 0 #e9e0ce inset;
            overflow: hidden;
            transition: transform 0.2s ease;
            display: flex;
            flex-direction: column;
            border: 1px solid #eadbba;
        }

        .page:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 28px rgba(0, 0, 0, 0.12);
        }

        .page-img {
            width: 100%;
            background: #f1ebdd;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px 20px 12px 20px;
            min-height: 320px;
        }

        .page-img img {
            max-width: 100%;
            /*max-height: 420px;*/
            width: auto;
            height: auto;
            object-fit: contain;
            border-radius: 12px;
            box-shadow: 0 5px 14px rgba(0, 0, 0, 0.1);
            transition: all 0.2s;
            background: #fff;
            display: block;
        }

        .page-footer {
            padding: 16px 20px 20px 20px;
            text-align: center;
            border-top: 1px dashed #e9dfcb;
            font-size: 0.85rem;
            color: #b49b6f;
            letter-spacing: 1px;
            font-style: italic;
        }

        .nav-buttons {
            display: flex;
            justify-content: center;
            gap: 35px;
            margin-top: 32px;
            margin-bottom: 8px;
        }

        .nav-btn {
            background: #f3e9d2;
            border: none;
            font-size: 1.8rem;
            font-weight: bold;
            font-family: inherit;
            padding: 12px 32px;
            border-radius: 60px;
            cursor: pointer;
            color: #6b4e2e;
            transition: all 0.2s ease;
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
            display: inline-flex;
            align-items: center;
            gap: 12px;
            letter-spacing: 2px;
            border: 1px solid #e3d1b5;
        }

        .nav-btn span {
            font-size: 1.4rem;
        }

        .nav-btn:hover {
            background: #e7d9bd;
            color: #4a351a;
            transform: scale(1.02);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.12);
            cursor: pointer;
        }

        .nav-btn:active {
            transform: scale(0.97);
        }

        .nav-btn.disabled {
            opacity: 0.5;
            cursor: not-allowed;
            pointer-events: none;
        }

        .info-tip {
            text-align: center;
            margin-top: 20px;
            font-size: 0.85rem;
            color: #9c855f;
            background: #fcf6ea;
            display: inline-block;
            width: auto;
            padding: 6px 18px;
            border-radius: 40px;
            letter-spacing: 1px;
        }

        .info-area {
            display: flex;
            justify-content: center;
        }

        @media (max-width: 780px) {
            .book-pages {
                flex-direction: column;
                gap: 28px;
            }
            body {
                padding: 16px;
            }
            .nav-btn {
                padding: 8px 22px;
                font-size: 1.4rem;
            }
            .page-img {
                min-height: 240px;
            }
        }

        .page:first-child {
            border-right: 1px solid #f2e8d8;
        }
        .page:last-child {
            border-left: 1px solid #f2e8d8;
        }