/* 기본 스타일 초기화 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Pretendard', -apple-system, sans-serif;
        }

        .div-container {
            top: 50px;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        /* 중앙 600x600 컨테이너 */
        .frame-container {
            position: relative;
            width: 700px;
            height: 700px;
            display: grid;
            grid-template-areas:
                ". top . "
                "left . right"
                ". bottom .";
            grid-template-columns: 1fr 1fr 1fr;
            grid-template-rows: 1fr 1fr 1fr;
        }

        /* 육각형 그룹 공통 스타일 (1열 배치) */
        .hex-group {
            display: flex;
            gap: 5px;
            justify-content: center;
            align-items: center;
        }

        /* 상단/하단은 가로 1열, 좌측/우측은 세로 1열 */
        .top-group { grid-area: top; flex-direction: row; align-items: flex-end; padding-bottom: 10px; }
        .bottom-group { grid-area: bottom; flex-direction: row; align-items: flex-start; padding-top: 10px; }
        .left-group { grid-area: left; flex-direction: column; align-items: flex-end; padding-right: 10px; }
        .right-group { grid-area: right; flex-direction: column; align-items: flex-start; padding-left: 10px; }

        /* 육각형 버튼 스타일 */
        .hex-btn {
            width: 80px;
            height: 92px;
            background-color: #3498db;
            color: white;
            display: flex;
            justify-content: center;
            align-items: center;
            text-decoration: none;
            font-weight: bold;
            font-size: 16px;
            cursor: pointer;
            clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            border: none;
        }

        .hex-btn:hover {
            background-color: #e74c3c;
            transform: scale(1.15);
            z-index: 10;
        }

        /* 중앙 마크 */
        .center-mark {
            grid-area: 2 / 2 / 3 / 3;
            display: flex;
            justify-content: center;
            align-items: center;
            color: #888;
            font-size: 1.1rem;
            border: 2px solid #333;
            border-radius: 10%;
            margin: 30px;
            text-align: center;
            background: rgba(255,255,255,0.02);
            font-weight: bold;
        }

        /* 모달 레이어 */
        .modal-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.95);
            z-index: 9999;
            justify-content: center;
            align-items: center;
            opacity: 0;
            transition: opacity 0.4s ease;
        }

        .modal-overlay.show {
            display: flex;
            opacity: 1;
        }

        /* 모달 창 */
        .modal-window {
            background: #000;
            width: 100%;
            height: 100%;
            display: flex;
            flex-direction: column;
            transform: scale(0.98);
            transition: transform 0.4s ease;
        }

        .modal-overlay.show .modal-window {
            transform: scale(1);
        }

        .modal-header {
            padding: 15px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid #333;
            background: #111;
            color: #fff;
        }

        .modal-header h2 { font-size: 1.2rem; font-weight: 500; }

        .close-btn {
            background: none;
            border: none;
            font-size: 2.5rem;
            cursor: pointer;
            color: #fff;
            line-height: 1;
        }

        .modal-content {
            flex: 1;
            position: relative;
            background: #000;
            overflow: hidden;
        }

        /* 아이프레임 스타일 */
        .content-iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: none;
            background: #fff;
        }