/* 팝업 오버레이 */
        .popup-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(5px);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .popup-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        /* 팝업 컨테이너 */
        .popup-container {
            background: white;
            border-radius: 20px;
            box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3);
            max-width: 450px;
            width: 90%;
            position: relative;
            transform: scale(0.8) translateY(30px);
            transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
            overflow: hidden;
        }

        .popup-overlay.active .popup-container {
            transform: scale(1) translateY(0);
        }

        /* 팝업 헤더 */
        .popup-header {
            background: linear-gradient(135deg, #ff6b6b, #ee5a52) ;
            color: white;
            padding: 20px;
            text-align: center;
            position: relative;
        }

        .popup-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
        }

        .popup-header h2 {
            font-size: 1.6em;
            font-weight: 600;
            margin-bottom: 5px;
            position: relative;
            z-index: 1;
        }

        .popup-header .date {
            font-size: 0.9em;
            opacity: 0.9;
            position: relative;
            z-index: 1;
        }

        /* 닫기 버튼 */
        .close-btn {
            position: absolute;
            top: 15px;
            right: 15px;
            background: rgba(255, 255, 255, 0.2);
            border: none;
            width: 35px;
            height: 35px;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s ease;
            z-index: 2;
        }

        .close-btn:hover {
            background: rgba(255, 255, 255, 0.3);
            transform: scale(1.1);
        }

        .close-btn::before {
            content: '×';
            color: white;
            font-size: 20px;
            font-weight: bold;
        }

        /* 팝업 내용 */
        .popup-content {
            padding: 30px;
            text-align: left;
            line-height: 1.6;
        }

        .popup-content h3 {
            color: #333;
            font-size: 1.3em;
            margin-bottom: 15px;
            padding-bottom: 8px;
            border-bottom: 2px solid #ff6b6b;
            display: inline-block;
        }

        .popup-content p {
            color: #555;
            margin-bottom: 15px;
            font-size: 0.95em;
        }

        .popup-content .highlight {
            background: linear-gradient(120deg, transparent 0%, transparent 50%, #ffe6e6 50%, #ffe6e6 100%);
            padding: 2px 4px;
            border-radius: 3px;
            font-weight: 600;
            color: #d63447;
        }

        /* 팝업 푸터 */
        .popup-footer {
            padding: 0 30px 30px 30px;
            display: flex;
            gap: 15px;
            justify-content: flex-end;
        }

        .btn {
            padding: 12px 24px;
            border: none;
            border-radius: 25px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.2s ease;
            font-size: 0.9em;
        }

        .btn-secondary {
            background: #f8f9fa;
            color: #6c757d;
            border: 1px solid #dee2e6;
        }

        .btn-secondary:hover {
            background: #e9ecef;
            transform: translateY(-1px);
        }

        .btn-primary {
            background: linear-gradient(135deg, #ff6b6b, #ee5a52);
            color: white;
            box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 107, 107, 0.4);
        }

        /* 체크박스 스타일 */
        .checkbox-container {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 20px;
            padding: 15px;
            background: #f8f9fa;
            border-radius: 10px;
            border-left: 4px solid #ff6b6b;
        }

        .checkbox-container input[type="checkbox"] {
            width: 18px;
            height: 18px;
            accent-color: #ff6b6b;
            cursor: pointer;
        }

        .checkbox-container label {
            font-size: 0.9em;
            color: #666;
            cursor: pointer;
            user-select: none;
        }

        /* 반응형 */
        @media (max-width: 480px) {
            .popup-container {
                margin: 20px;
                max-width: none;
                width: calc(100% - 40px);
            }
            
            .popup-content {
                padding: 20px;
            }
            
            .popup-footer {
                padding: 0 20px 20px 20px;
                flex-direction: column;
            }
            
            .btn {
                width: 100%;
            }
        }

        /* 애니메이션 */
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: scale(0.8) translateY(30px);
            }
            to {
                opacity: 1;
                transform: scale(1) translateY(0);
            }
        }

        .popup-container.animate {
            animation: fadeIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
        }