/* --- 브랜드 컬러 팔레트 --- */
        :root {
            --color-primary: #6D4C91;     /* 소프트 퍼플 (메인) */
            --color-secondary: #E07A5F;   /* 웜 코랄 (포인트/버튼) */
            --color-bg-cream: #FEF7ED;    /* 크림 (배경) */
            --color-bg-mint: #E6F5F1;     /* 민트 (서브 배경) */
            --color-accent-gold: #D4A574; /* 골드 (강조) */
            --color-text-navy: #2C3E6B;   /* 네이비 (제목 텍스트) */
            --color-text-main: #333333;   /* 기본 텍스트 */
            --color-text-light: #666666;  /* 서브 텍스트 */
            
            --font-title: 'Nanum Myeongjo', serif;
            --font-body: 'Pretendard', sans-serif;
        }

        /* --- 기본 리셋 및 공통 스타일 --- */
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-body);
            background-color: #ffffff;
            color: var(--color-text-main);
            line-height: 1.6;
            word-break: keep-all;
        }

        h1, h2, h3, h4, .serif { font-family: var(--font-title); }
        a { text-decoration: none; color: inherit; }
        ul { list-style: none; }

        .container {
            max-width: 1080px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* --- 공통 버튼 디자인 --- */
        .btn {
            display: inline-block;
            padding: 16px 40px;
            background-color: var(--color-secondary);
            color: #ffffff;
            border-radius: 50px;
            font-size: 1.15rem;
            font-weight: 700;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            text-align: center;
            box-shadow: 0 8px 20px rgba(224, 122, 95, 0.3);
        }
        .btn:hover {
            transform: translateY(-3px);
            background-color: #d16b50;
            box-shadow: 0 12px 25px rgba(224, 122, 95, 0.4);
        }

        /* 🌟 카카오톡 전용 버튼 디자인 (직관성 강화) */
        .btn-kakao {
            background-color: #FEE500 !important;
            color: #381E1F !important; /* 카카오 고유 텍스트 색상 */
            box-shadow: 0 8px 20px rgba(254, 229, 0, 0.3) !important;
        }
        .btn-kakao:hover {
            background-color: #FADA0A !important;
            box-shadow: 0 12px 25px rgba(254, 229, 0, 0.4) !important;
        }

        /* --- 섹션 공통 --- */
        section { 
            padding: 100px 0; 
            scroll-margin-top: 80px; /* 헤더 높이만큼 여백 확보 */
        }

        .sec-title {
            text-align: center;
            font-size: 2.5rem;
            color: var(--color-primary);
            margin-bottom: 15px;
            font-weight: 800;
        }
        .sec-desc {
            text-align: center;
            font-size: 1.15rem;
            color: var(--color-text-light);
            margin-bottom: 60px;
        }

        /* --- 네비게이션 헤더 --- */
        header {
            position: fixed;
            top: 0; left: 0; right: 0;
            background: rgba(254, 247, 237, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.03);
            padding: 15px 0;
        }
        .header-inner {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            align-items: center;
        }
        .header-left { justify-self: start; }
        .header-center { justify-self: center; }
        .header-right { justify-self: end; }

        .logo { 
            font-size: 28px; 
            font-weight: 800; 
            color: var(--color-primary); 
            font-family: var(--font-title); 
            letter-spacing: -1px;
            display: inline-block;
        }


        /* --- 1. 메인 히어로 섹션 (전체 배경화면 버전) --- */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 0;
            background: linear-gradient(rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.4), #ffffff), 
                        url('./main-image.jpg') no-repeat center center;
            background-size: cover;
            /* background-attachment: fixed; 를 제거하여 스크롤 시 짤림 현상을 방지합니다 */
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
        }

        .hero h1 {
            font-size: 4.2rem;
            line-height: 1.2;
            margin-bottom: 25px;
            color: var(--color-text-navy);
            text-shadow: 0 2px 10px rgba(255,255,255,0.8);
        }
        
        .hero h1 span { color: var(--color-primary); display: block; font-size: 2rem; margin-bottom: 15px;}
        
        .hero .slogan {
            font-size: 1.8rem;
            color: var(--color-secondary);
            margin-bottom: 40px;
            font-weight: 700;
        }

        .hero-btns {
            display: flex;
            gap: 15px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .hero-img { display: none; } /* 기존 이미지는 배경으로 대체됨 */


        /* --- 2. 속마음 공감 섹션 --- */
        .empathy-bg { background-color: var(--color-bg-mint); border-radius: 40px; padding: 80px 40px; margin: 0 20px; }
        .empathy-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
            max-width: 600px;
            margin: 0 auto 40px;
        }
        .empathy-list li {
            background: #ffffff;
            padding: 20px 30px;
            border-radius: 15px;
            font-size: 1.15rem;
            color: var(--color-text-navy);
            font-weight: 600;
            display: flex;
            align-items: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
        }
        .empathy-list li i { color: var(--color-secondary); margin-right: 15px; font-size: 1.4rem; }
        .empathy-conclusion { text-align: center; font-size: 1.8rem; color: var(--color-primary); font-weight: 800; line-height: 1.5;}

        /* --- 3. 프로그램 개요 --- */
        .overview-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 25px;
        }
        .overview-card {
            background: #ffffff;
            padding: 40px 30px;
            border-radius: 20px;
            text-align: center;
            border: 1px solid #f0f0f0;
            transition: transform 0.3s;
        }
        .overview-card:hover { transform: translateY(-10px); box-shadow: 0 15px 30px rgba(109, 76, 145, 0.08); border-color: transparent;}
        .overview-icon {
            width: 80px; height: 80px;
            background: var(--color-bg-cream);
            color: var(--color-primary);
            border-radius: 50%;
            display: flex; justify-content: center; align-items: center;
            font-size: 2rem;
            margin: 0 auto 20px;
        }
        .overview-card h3 { font-size: 1.4rem; color: var(--color-text-navy); margin-bottom: 15px; }
        .overview-card p { color: var(--color-text-light); font-size: 1rem; }

        /* --- 4. 킬링 포인트 5가지 --- */
        .features { background-color: var(--color-bg-cream); }
        .features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; }
        .feature-card {
            background: #ffffff;
            padding: 40px;
            border-radius: 25px;
            display: flex;
            gap: 25px;
            align-items: flex-start;
            box-shadow: 0 10px 20px rgba(0,0,0,0.02);
            border-top: 5px solid var(--color-primary);
        }
        .feature-card:nth-child(even) { border-top-color: var(--color-secondary); }
        .feature-num {
            font-family: var(--font-title);
            font-size: 3rem;
            color: var(--color-accent-gold);
            font-weight: 800;
            line-height: 1;
            opacity: 0.4;
        }
        .feature-text h3 { font-size: 1.35rem; color: var(--color-text-navy); margin-bottom: 12px; }
        .feature-text p { color: var(--color-text-main); font-size: 1.05rem; }
        
        .feature-card.full { grid-column: 1 / -1; background: var(--color-bg-mint); border-top-color: var(--color-text-navy);}

        /* --- 5. 커리큘럼 로드맵 --- */
        .timeline { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
        .tl-card {
            background: #ffffff;
            padding: 35px 25px;
            border-radius: 20px;
            border: 1px solid #eaeaea;
            position: relative;
        }
        .tl-badge {
            background: var(--color-text-navy);
            color: #ffffff;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: bold;
            display: inline-block;
            margin-bottom: 15px;
        }
        .tl-card h3 { font-size: 1.4rem; margin-bottom: 15px; color: var(--color-primary); }
        .tl-card ul { margin-bottom: 25px; min-height: 80px; }
        .tl-card ul li { position: relative; padding-left: 15px; margin-bottom: 8px; font-size: 0.95rem; color: var(--color-text-light); }
        .tl-card ul li::before { content: "•"; position: absolute; left: 0; color: var(--color-secondary); font-weight: bold; }
        .tl-result {
            background: var(--color-bg-cream);
            padding: 12px;
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--color-primary);
            text-align: center;
        }

        /* --- 6. 수강신청 --- */
        .enroll-card {
            background: #ffffff;
            border-radius: 30px;
            padding: 60px;
            max-width: 850px;
            margin: 0 auto;
            box-shadow: 0 25px 50px rgba(109, 76, 145, 0.1);
            border: 2px solid var(--color-primary);
        }
        .info-row {
            display: flex;
            padding: 20px 0;
            border-bottom: 1px dashed #ddd;
            align-items: flex-start;
        }
        .info-row:last-child { border-bottom: none; }
        .info-label { width: 150px; font-weight: 800; color: var(--color-primary); font-size: 1.1rem; }
        .info-value { flex: 1; font-size: 1.1rem; }
        .highlight-box {
            background: var(--color-bg-cream);
            padding: 20px;
            border-radius: 15px;
            text-align: center;
            margin: 30px 0;
            color: var(--color-secondary);
            font-weight: 800;
            font-size: 1.2rem;
        }
        .cta-wrap { text-align: center; margin-top: 20px; }

        /* --- 푸터 --- */
        footer {
            background-color: var(--color-text-navy);
            color: #ffffff;
            text-align: center;
            padding: 60px 20px;
        }
        footer h2 { margin-bottom: 15px; font-size: 1.8rem; color: var(--color-bg-cream);}
        footer p { opacity: 0.7; font-size: 0.95rem; margin-bottom: 10px; }

        /* --- 모바일 반응형 (정밀 조정) --- */
        @media screen and (max-width: 768px) {
            .hero {
                padding: 80px 0;
                min-height: 80vh; /* 모바일에서는 높이를 약간 줄임 */
                background-attachment: scroll; /* 모바일 성능 및 버그 방지 */
                background-position: 70% center; /* 엄마와 아이가 중앙에 오도록 위치 조정 */
            }
            .hero h1 { 
                font-size: 2.4rem; 
                word-break: keep-all;
            }
            .hero h1 span { font-size: 1.2rem; }
            .hero .slogan { font-size: 1.2rem; }
            .hero-btns {
                flex-direction: column;
                padding: 0 20px;
            }
            .hero-btns .btn {
                width: 100%;
                padding: 15px 20px;
                font-size: 1rem;
            }
            .sec-title { font-size: 1.8rem; }
            .sec-desc { font-size: 1rem; padding: 0 10px; }
            .empathy-bg { padding: 40px 15px; border-radius: 20px;}
            .empathy-list li { font-size: 0.95rem; padding: 12px 15px;}
            .feature-card { flex-direction: column; gap: 15px; padding: 25px; }
            .info-row { flex-direction: column; padding: 15px 0; }
            .info-label { margin-bottom: 8px; width: 100%; font-size: 1rem; }
            .enroll-card { padding: 30px 15px; border-radius: 20px; }
            
            /* 채팅 엔진 모바일 대응 */
            #engine-root {
                min-height: 500px !important;
                border-radius: 15px !important;
            }
        }