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

       body {
    font-family: 'Times New Roman', serif;
    background-color: #f9f6f0;
    color: #2c2c2c;
    line-height: 1.6;
   
}

        /* Header */
        .header {
            background-color: #f5f2e8;
            border-bottom: 3px solid #3a3a3a;
            padding: 1rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 100;
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 2rem;
        }

       .musical-portfolio {
            position: relative;
            display: inline-block;
            font-size: 2rem;
            font-weight: 300;
            color: #1a1a1a;
            letter-spacing: 2px;
            margin: 0;
            cursor: pointer;
            text-decoration: none;
        }
        

        /* 오선 배경 */
        .musical-portfolio::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -15px;
    right: -15px;
    height: 50px;
    transform: translateY(-50%);
    background-image: 
        repeating-linear-gradient(
            transparent,
            transparent 6px,
            #999 6px,
            #999 7px,
            transparent 7px,
            transparent 13px
        );
    z-index: -1;
    opacity: 0.5;
}

        /* 개별 글자 스타일링 */
        .musical-letter {
            display: inline-block;
            position: relative;
            transition: all 0.3s ease;
            margin: 0 1px;
        }

        .musical-letter:hover {
    transform: translateY(-3px);
    color: #d4af37;
    text-shadow: 0 0 10px rgba(212, 175, 55, 0.6), 0 0 20px rgba(212, 175, 55, 0.4);
    transition: all 0.3s ease;
}

        /* 음표가 들어갈 특정 글자들 */
        .musical-letter.note-p::after {
            content: '♪';
            position: absolute;
            top: -12px;
            right: -6px;
            font-size: 14px;
            color: #1a1a1a;
            animation: bounce 2s infinite;
        }

        .musical-letter.note-t::after {
            content: '♫';
            position: absolute;
            top: -12px;
            right: -6px;
            font-size: 12px;
            color: #1a1a1a;
            animation: bounce 2s infinite 0.5s;
        }

        .musical-letter.note-o::after {
            content: '♬';
            position: absolute;
            top: -12px;
            right: -6px;
            font-size: 13px;
            color: #1a1a1a;
            animation: bounce 2s infinite 1s;
        }

        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% {
                transform: translateY(0);
            }
            40% {
                transform: translateY(-4px);
            }
            60% {
                transform: translateY(-2px);
            }
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 2rem;
            align-items: center;
        }

        .nav-menu a {
            color: #2c2c2c;
            text-decoration: none;
            font-size: 1.1rem;
            font-weight: 500;
            transition: color 0.3s ease;
            padding: 0.5rem 1rem;
            border: 1px solid transparent;
            cursor: pointer;
        }

        .nav-menu a:hover {
            color: #1a1a1a;
            border: 1px solid #1a1a1a;
        }

        .nav-menu a.active {
            color: #8b4513;
            border: 1px solid #8b4513;
            background-color: rgba(139, 69, 19, 0.1);
        }

        .nav-menu a.active:hover {
            color: #654321;
            border: 1px solid #654321;
        }

        /* Page Container */
        .page-container {
            margin-top: 80px;
            min-height: calc(100vh - 80px);
            display: none;
        }

        .page-container.active {
            display: block;
        }

        /* Main Content */
        .main-content {
            margin-top: 80px;
        }

        /* Hero Section의 새로운 스타일 */
/* Hero Section의 새로운 스타일 */
.hero {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 2rem;
}
.hero-content {
    display: flex;
    align-items: center;
    gap: 3rem;
    background: linear-gradient(135deg, #fff 0%, #f9f6f0 100%);
    border: 2px solid #e8e5e0;
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    position: relative;
    overflow: hidden;
}
.hero-content::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.03) 0%, transparent 70%);
    z-index: 0;
}
.hero-left {
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}
.hero-image-container {
    position: relative;
}
.hero-profile-image {
    width: 140px;
    height: 170px;
    border-radius: 12px; /* 원형에서 둥근 모서리 사각형으로 변경 */
    object-fit: cover; /* 이미지 비율 유지하면서 영역에 맞게 조정 */
    object-position: center; /* 이미지 중앙 정렬 */
    border: 3px solid #d4af37;
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.25);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.hero-profile-image:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(212, 175, 55, 0.35);
}
.profile-placeholder {
    width: 140px;
    height: 170px;
    border-radius: 12px; /* 원형에서 둥근 모서리 사각형으로 변경 */
    background: linear-gradient(135deg, #f0f0f0 0%, #e8e8e8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    font-size: 0.85rem;
    border: 3px solid #d4af37;
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.25);
    text-align: center;
    line-height: 1.2;
}
.hero-right {
    flex: 1;
    position: relative;
    z-index: 1;
}
.hero-text {
    text-align: left;
}
.hero-name {
    font-size: 2.2rem;
    font-weight: 600;
    color: #1a1a1a;
    margin: 0 0 0.5rem 0;
    letter-spacing: 1px;
}
.hero-name-en {
    font-size: 1.1rem;
    color: #888;
    margin: 0 0 1.8rem 0;
    font-style: italic;
    font-weight: 300;
}
.hero-description {
    line-height: 1.7;
}
.hero-quote {
    font-size: 1.15rem;
    color: #2c2c2c;
    margin: 0 0 1.5rem 0;
    font-weight: 500;
    padding-left: 1rem;
    border-left: 3px solid #d4af37;
    background: rgba(212, 175, 55, 0.05);
    padding: 1rem 1rem 1rem 1.5rem;
    border-radius: 0 8px 8px 0;
}
.hero-quote .highlight {
    color: #d4af37;
    font-weight: 600;
}
.hero-goal {
    font-size: 1rem;
    color: #555;
    margin: 0;
    background: rgba(249, 246, 240, 0.8);
    padding: 1.2rem;
    border-radius: 8px;
    border: 1px solid #e8e5e0;
}
/* 레스폰시브 대응 */
@media (max-width: 768px) {
    .hero {
        margin: 1rem auto;
        padding: 0 1rem;
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
        padding: 2rem 1.5rem;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .hero-name {
        font-size: 1.8rem;
    }
    
    .hero-profile-image,
    .profile-placeholder {
        width: 120px;
        height: 145px;
    }
    
    .hero-quote {
        font-size: 1rem;
        padding: 0.8rem 1rem 0.8rem 1.2rem;
    }
    
    .hero-goal {
        font-size: 0.95rem;
        padding: 1rem;
    }
}
@media (max-width: 480px) {
    .hero-content {
        padding: 1.5rem 1rem;
    }
    
    .hero-name {
        font-size: 1.6rem;
    }
    
    .hero-name-en {
        font-size: 1rem;
    }
    
    .hero-profile-image,
    .profile-placeholder {
        width: 100px;
        height: 121px;
    }
}


        /* Sheet Music Section in Main */
        .sheet-music-main {
            max-width: 1200px;
            margin: 4rem auto;
            padding: 0 2rem;
        }

        .sheet-music-container {
            position: relative;
            height: 700px;
            background-color: #fff;
            border: 3px solid #2c2c2c;
            overflow: hidden;
            perspective: 1000px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        .sheet-viewer {
            position: relative;
            width: 100%;
            height: 100%;
            perspective: 1000px;
            overflow: hidden;
        }

        .sheet-page {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.8s cubic-bezier(0.4, 0.0, 0.2, 1);
            transform-origin: left center;
            backface-visibility: hidden;
            border-right: 1px solid #ddd;
        }

        .sheet-page img {
            max-width: 95%;
            max-height: 95%;
            object-fit: contain;
            border-radius: 5px;
        }

        .sheet-page.turning {
            transform: rotateY(-180deg);
        }

        .sheet-page.next {
            transform: rotateY(180deg);
        }

        .sheet-page.next.turning {
            transform: rotateY(0deg);
        }

        .sheet-navigation {
            text-align: center;
            margin-top: 1rem;
            background-color: #f5f2e8;
            padding: 1rem;
            border-top: 1px solid #d4c8b8;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 2rem;
        }

        .nav-btn {
            padding: 0.8rem 2rem;
            background-color: #2c2c2c;
            color: #f9f6f0;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            transition: background-color 0.3s ease;
            font-family: 'Times New Roman', serif;
        }

        .nav-btn:hover:not(:disabled) {
            background-color: #1a1a1a;
        }

        .nav-btn:disabled {
            background-color: #999;
            cursor: not-allowed;
        }

        .page-indicator {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.1rem;
            color: #2c2c2c;
            font-weight: bold;
        }

        .sheet-title {
            text-align: center;
            padding: 1rem;
            background: #f5f2e8;
            margin: 0;
            border-bottom: 2px solid #2c2c2c;
            color: #1a1a1a;
            font-size: 1.1rem;
            font-weight: bold;
        }

        /* 전체 페이지 레이아웃으로 변경된 Content Page */
        .content-page {
            max-width: none;
            margin: 0;
            padding: 3rem 2rem;
            position: relative;
            min-height: calc(100vh - 160px);
        }

        /* Book Container - 네모 모달 제거하고 전체 페이지로 변경 */
        .book-container {
            position: relative;
            height: auto;
            min-height: auto;
            background: transparent;
            border: none;
            box-shadow: none;
            perspective: none;
            overflow: visible;
            padding: 0;
            margin: 0;
            max-width: 1400px;
            margin: 0 auto;
        }

        /* Book Page를 일반 페이지로 변경 */
        .book-page {
            position: relative;
            top: auto;
            left: auto;
            width: 100%;
            height: auto;
            background: transparent;
            transform-origin: none;
            transition: opacity 0.3s ease, transform 0.3s ease;
            backface-visibility: visible;
            padding: 0;
            overflow: visible;
            border: none;
            display: none;
        }

        .book-page.active {
            display: block;
            animation: pageShow 0.3s ease forwards;
        }

        @keyframes pageShow {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* 기존 3D 효과 클래스들 무효화 */
        .book-page.turning,
        .book-page.next-page,
        .book-page.next-page.turning {
            transform: none;
        }

        .book-page h2 {
            font-size: 3rem;
            margin-bottom: 3rem;
            color: #1a1a1a;
            border-bottom: 3px solid #2c2c2c;
            padding-bottom: 1.5rem;
            text-align: center;
        }

        /* Navigation을 페이지 하단으로 이동 */
        .book-navigation {
            position: relative;
            bottom: auto;
            left: auto;
            transform: none;
            display: flex;
            gap: 1rem;
            align-items: center;
            background: rgba(249, 246, 240, 0.95);
            padding: 0.8rem 1.5rem;
            border: 2px solid #2c2c2c;
            border-radius: 40px;
            margin: 3rem auto 2rem;
            max-width: 280px;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        }

        .book-nav-btn {
            padding: 0.5rem 1rem;    /* 기존: 0.6rem 1.2rem */
            font-size: 0.9rem;       /* 기존: 1rem */
            background-color: #2c2c2c;
            color: #f9f6f0;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            font-family: 'Times New Roman', serif;
            border-radius: 25px;
        }

        .book-nav-btn:hover:not(:disabled) {
            background-color: #1a1a1a;
            transform: translateY(-2px);
        }

        .book-nav-btn:disabled {
            background-color: #999;
            cursor: not-allowed;
            opacity: 0.5;
        }

        .book-page-indicator {
            font-size: 1rem;
            color: #2c2c2c;
            font-weight: bold;
            padding: 0.5rem 1rem;
            background: rgba(255,255,255,0.8);
            border-radius: 20px;
            min-width: 80px;
            text-align: center;
        }

        /* About Content Styles */
        .about-content {
            display: block;
            max-width: none;
            margin: 0;
            padding: 0;
        }

        .status-section {
            display: flex;
            justify-content: center;
            margin-bottom: 2rem;
            width: 100%;
        }

        .status-image {
            max-width: 100%;
            width: auto;
            height: auto;
            border-radius: 12px;
            transition: transform 0.3s ease;
        }

        .status-image:hover {
            transform: scale(1.02);
        }

        .intro-section {
            text-align: center;
            margin-top: 0rem;
            max-width: 800px;
            margin: 0 auto;
        }

        .about-description {
            font-size: 1.2rem;
            color: #2c2c2c;
            line-height: 1.8;
            margin: 0;
        }

        /* Project Card Styles - 전체 페이지 활용 */
        .project-card {
            background-color: #f9f6f0;
            border: 2px solid #2c2c2c;
            padding: 4rem;
            margin-bottom: 3rem;
            position: relative;
            border-radius: 12px;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
        }

        .project-card h3 {
            font-size: 2.5rem;
            margin-bottom: 2.5rem;
            color: #1a1a1a;
            text-align: center;
            border-bottom: 3px solid #2c2c2c;
            padding-bottom: 1.5rem;
        }

        .project-card p {
            margin-bottom: 1.5rem;
            line-height: 1.8;
            font-size: 1.1rem;
            color: #2c2c2c;
        }

        .project-card ul {
            text-align: left;
            max-width: 700px;
            margin: 1.5rem auto;
            color: #4a4a4a;
        }

        .project-card li {
            margin-bottom: 0.8rem;
            font-size: 1.05rem;
        }

        .project-card strong {
            color: #1a1a1a;
        }

        /* 이미지를 더 크고 중앙에 배치 */
        .bottom-right-image {
            position: static;
            width: 100%;
            max-width: 700px;
            height: auto;
            border-radius: 12px;
            margin: 3rem auto;
            display: block;
            box-shadow: 0 6px 20px rgba(0,0,0,0.15);
            transition: transform 0.3s ease;
        }

        .bottom-right-image:hover {
            transform: scale(1.02);
        }

        .project-card:has(.bottom-right-image) {
            padding-bottom: 4rem;
        }

        /* Profile Container 전체 폭 활용 */
        .profile-container {
            max-width: 1200px;
            margin: 0 auto;
            background: #fff;
            border: 3px solid #2c2c2c;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            height: auto;
            min-height: auto;
        }

        .profile-header {
            background: linear-gradient(135deg, #f5f2e8 0%, #ebe8e0 100%);
            color: #1a1a1a;
            text-align: center;
            padding: 2rem;
            border-bottom: 3px solid #d4af37;
        }

        .profile-header h2 {
            font-size: 2.2rem;
            margin: 0;
            letter-spacing: 2px;
        }

        .profile-main {
            display: grid;
            grid-template-columns: 300px 1fr;
            min-height: 600px;
        }

        .profile-left {
            background: linear-gradient(180deg, #f5f2e8 0%, #ebe8e0 100%);
            padding: 2rem;
            border-right: 2px solid #d4af37;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .profile-image-section {
            text-align: center;
            margin-bottom: 1.5rem;
        }

        .profile-image-container {
            width: 160px;
            height: 200px;
            margin: 0 auto 1.5rem;
            border-radius: 12px;
            overflow: hidden;
            border: 3px solid #d4af37;
            box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
        }

        .profile-image-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .profile-name {
            font-size: 1.3rem;
            font-weight: bold;
            color: #1a1a1a;
            margin-bottom: 0.5rem;
        }

        .profile-subtitle {
            font-size: 1rem;
            color: #666;
            text-align: center;
        }

        .achievements-section {
            width: 100%;
        }

        .achievements-title {
            font-size: 1.1rem;
            font-weight: bold;
            color: #1a1a1a;
            margin-bottom: 1rem;
            text-align: center;
            border-bottom: 2px solid #d4af37;
            padding-bottom: 0.5rem;
        }

        .achievement-item {
            background: #fff;
            border: 2px solid #4CAF50;
            border-radius: 8px;
            padding: 0.5rem;
            margin-bottom: 1rem;
            text-align: center;
            box-shadow: 0 2px 8px rgba(76, 175, 80, 0.2);
            transition: transform 0.2s ease;
        }

        .achievement-item:hover {
            transform: translateY(-2px);
        }

        .achievement-item:last-child {
            margin-bottom: 0;
        }

        .paiza-container {
            width: 100%;
            height: 120px;
            margin: 0 auto 0.5rem;
            border-radius: 5px;
            overflow: hidden;
            background: #fff;
            padding: 0;
            border: none;
        }

        .paiza-container img {
            width: 100%;
            height: 100%;
            object-fit: contain;
            border-radius: 0;
        }

        .achievement-label {
            font-size: 0.9rem;
            font-weight: bold;
            color: #4CAF50;
        }

        .jlpt-badge {
            background: linear-gradient(135deg, #FF6B6B, #FF5252);
            color: white;
            padding: 1rem;
            border-radius: 8px;
            font-weight: bold;
            font-size: 0.9rem;
            border-color: #FF6B6B;
        }

        .profile-right {
            padding: 2rem;
            display: flex;
            flex-direction: column;
            justify-content: flex-start;
        }

        .info-section {
            margin-bottom: 2rem;
        }

        .info-title {
            font-size: 1.4rem;
            font-weight: bold;
            color: #1a1a1a;
            margin-bottom: 1.5rem;
            border-left: 4px solid #d4af37;
            padding-left: 1.5rem;
        }

        .info-item {
            display: flex;
            margin-bottom: 1rem;
            align-items: flex-start;
        }

        .info-label {
            font-weight: bold;
            color: #2c2c2c;
            min-width: 80px;
            margin-right: 1rem;
            font-size: 1rem;
        }

        .info-value {
            color: #4a4a4a;
            flex: 1;
            font-size: 1rem;
        }

        .university-info {
            color: #d4af37;
            font-weight: bold;
        }

        .intro-text {
            background: linear-gradient(135deg, #f9f6f0 0%, #f5f2e8 100%);
            padding: 2rem;
            border-radius: 8px;
            border: 1px solid #d4af37;
            font-size: 1.05rem;
            line-height: 1.7;
            color: #2c2c2c;
            text-align: center;
        }

        .highlight {
            color: #d4af37;
            font-weight: bold;
        }

        .skills-container {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 0.5rem;
        }

        .skill-tag {
            background: linear-gradient(135deg, #8B9DC3, #7A8DB0);
            color: white;
            padding: 0.3rem 0.8rem;
            border-radius: 15px;
            font-size: 0.85rem;
            font-weight: 500;
        }

        /* Video Container 크기 확대 */
        .video-project {
            text-align: center;
        }

        .video-container {
            position: relative;
            width: 100%;
            max-width: 1000px;
            margin: 3rem auto;
            padding-bottom: 50%;
            height: 0;
            overflow: hidden;
            border: 3px solid #2c2c2c;
            border-radius: 12px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
            background-color: #000;
        }

        .video-container iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: none;
            border-radius: 8px;
        }

        /* Planning Navigation Styles */
        .planning-navigation {
            margin-top: 2rem;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 1.5rem;
        }

        .planning-nav-btn {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border: 1px solid #dee2e6;
            border-radius: 8px;
            padding: 10px 16px;      /* 기존: 12px 20px */
            font-size: 0.9rem; 
            color: #495057;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .planning-nav-btn:hover {
            background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
            transform: translateY(-1px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.15);
        }

        .planning-nav-btn:disabled,
        .planning-nav-btn[style*="pointer-events: none"] {
            opacity: 0.5;
            cursor: not-allowed;
            pointer-events: none;
        }

        .planning-nav-btn .nav-arrow {
            font-size: 14px;
        }

        .planning-nav-btn .nav-text {
            font-size: 1rem;
        }

        .planning-page-indicator {
            padding: 10px 20px;
            background: rgba(248, 249, 250, 0.8);
            border-radius: 25px;
            font-size: 0.95rem;
            color: #6c757d;
            font-weight: 500;
            border: 1px solid #e9ecef;
            min-width: 100px;
            text-align: center;
        }

        /* 다운로드 버튼 스타일 */
        .download-btn {
            background: linear-gradient(135deg, #f5f5f0 0%, #ebe8e0 100%);
            color: #2c3e50;
            border: 2px solid #d4af37;
            padding: 12px 24px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: 0 4px 20px rgba(212, 175, 55, 0.2);
            margin: 0 5px 10px 5px;
            position: relative;
            overflow: hidden;
            font-family: serif;
            letter-spacing: 0.5px;
            text-decoration: none;
            display: inline-block;
        }

        .download-btn:before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.2), transparent);
            transition: left 0.6s;
        }

        .download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(212, 175, 55, 0.4);
            background: linear-gradient(135deg, #f0f0ea 0%, #e8e5dd 100%);
            border-color: #b8860b;
            color: #1a1a1a;
        }

        .download-btn:hover:before {
            left: 100%;
        }

        .download-btn:active {
            transform: translateY(-1px);
            box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
        }

        .download-btn:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.3);
        }

        /* Learning Memo Viewer Styles */
        .learning-memo-section {
            margin: 3rem 0;
            text-align: center;
        }

        .learning-memo-title {
            color: #333;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
            font-weight: bold;
        }

        .learning-memo-subtitle {
            color: #666;
            font-size: 1rem;
            margin-bottom: 2rem;
        }

        .learning-memo-container {
            position: relative;
            height: 500px;
            background-color: #fff;
            border: 3px solid #2c2c2c;
            overflow: hidden;
            perspective: 1000px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            border-radius: 8px;
            margin-bottom: 0;
        }

        .learning-memo-viewer {
            position: relative;
            width: 100%;
            height: 100%;
            perspective: 1000px;
            overflow: hidden;
        }

        .memo-page {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.8s cubic-bezier(0.4, 0.0, 0.2, 1);
            transform-origin: left center;
            backface-visibility: hidden;
            border-right: 1px solid #ddd;
            padding: 1rem;
        }

        .memo-page img {
            max-width: 95%;
            max-height: 95%;
            object-fit: contain;
            border-radius: 5px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }

        .memo-error {
            color: #666;
            text-align: center;
            padding: 2rem;
            border: 1px dashed #ccc;
            border-radius: 8px;
            background: #f9f9f9;
            width: 80%;
            height: 60%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-direction: column;
        }

        .memo-page.turning {
            transform: rotateY(-180deg);
        }

        .memo-page.next {
            transform: rotateY(180deg);
        }

        .memo-page.next.turning {
            transform: rotateY(0deg);
        }

        /* Learning Memo Navigation */
        .memo-navigation {
            margin-top: 2rem;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 1.5rem;
        }

        .memo-nav-btn {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%) !important;
            border: 1px solid #dee2e6 !important;
            border-radius: 8px !important;
            padding: 12px 20px !important;
            color: #495057 !important;
            font-size: 1rem !important;
            font-weight: 500 !important;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            gap: 8px;
            font-family: 'Times New Roman', serif;
        }

        .memo-nav-btn:hover:not(:disabled) {
            background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%) !important;
            transform: translateY(-1px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.15);
        }

        .memo-nav-btn:disabled {
            opacity: 0.5 !important;
            cursor: not-allowed !important;
            pointer-events: none;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%) !important;
        }

        .memo-nav-btn .nav-arrow {
            font-size: 14px;
        }

        .memo-nav-btn .nav-text {
            font-size: 1rem;
        }

        .memo-page-indicator {
            padding: 10px 20px;
            background: rgba(248, 249, 250, 0.8);
            border-radius: 25px;
            font-size: 0.95rem;
            color: #6c757d;
            font-weight: 500;
            border: 1px solid #e9ecef;
            min-width: 100px;
            text-align: center;
        }

        .learning-memo-note {
            color: #666;
            font-size: 0.9rem;
            margin-top: 1.5rem;
            font-style: italic;
        }

        /* Debug Diary Styles */
        .debug-scroll-container {
            max-height: 70vh;
            overflow-y: auto;
            padding: 1.5rem;
            background: #f8f9fa;
            border-radius: 8px;
            border: 2px solid #e9ecef;
            margin-bottom: 2rem;
        }

        .debug-item {
            background: #fff;
            border: 1px solid #dee2e6;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            padding: 0;
            overflow: hidden;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

        .debug-item:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }

        .debug-item:last-child {
            margin-bottom: 0;
        }

        .debug-header {
            background: linear-gradient(135deg, #6c757d 0%, #5a6268 100%);
            color: white;
            padding: 1rem 1.5rem;
            display: flex;
            align-items: center;
            gap: 1rem;
            cursor: pointer;
            position: relative;
        }

        .debug-header:hover {
            background: linear-gradient(135deg, #5a6268 0%, #495057 100%);
        }

        .debug-number {
            background: #fff;
            color: #6c757d;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            font-weight: bold;
            flex-shrink: 0;
        }

        .debug-header h4 {
            margin: 0;
            font-size: 1.1rem;
            font-weight: 600;
            flex: 1;
        }

        .debug-date {
            font-size: 0.85rem;
            opacity: 0.9;
            background: rgba(255,255,255,0.1);
            padding: 0.3rem 0.8rem;
            border-radius: 15px;
            flex-shrink: 0;
        }

        .debug-content {
            padding: 1.5rem;
            background: #fff;
        }

        .debug-section {
            margin-bottom: 1rem;
            color: #4a4a4a;
            line-height: 1.6;
        }

        .debug-section:last-child {
            margin-bottom: 0;
        }

        .debug-section strong {
            color: #2c3e50;
            font-weight: 600;
        }

        .code-block {
            background: #f8f9fa;
            border: 1px solid #e9ecef;
            border-left: 4px solid #dc3545;
            padding: 1rem;
            margin: 0.8rem 0;
            border-radius: 4px;
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
            color: #dc3545;
            overflow-x: auto;
            white-space: pre-wrap;
            word-break: break-all;
        }

        .code-block.success-code {
            border-left: 4px solid #28a745;
            color: #155724;
        }

        .debug-scroll-container::-webkit-scrollbar {
            width: 8px;
        }

        .debug-scroll-container::-webkit-scrollbar-track {
            background: #f1f1f1;
            border-radius: 4px;
        }

        .debug-scroll-container::-webkit-scrollbar-thumb {
            background: #c1c1c1;
            border-radius: 4px;
        }

        .debug-scroll-container::-webkit-scrollbar-thumb:hover {
            background: #a8a8a8;
        }

        /* Image Modal Styles */
        .image-modal {
            display: none;
            position: fixed;
            z-index: 9999;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.9);
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .image-modal.show {
            display: block;
            opacity: 1;
        }

        .modal-content {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) scale(0.8);
            max-width: 95%;
            max-height: 95%;
            transition: transform 0.3s ease;
        }

        .image-modal.show .modal-content {
            transform: translate(-50%, -50%) scale(1);
        }

        .modal-image {
            width: 100%;
            height: 100%;
            object-fit: contain;
            border-radius: 8px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
        }

        .modal-close {
            position: absolute;
            top: 20px;
            right: 30px;
            color: #fff;
            font-size: 40px;
            font-weight: bold;
            cursor: pointer;
            z-index: 10000;
            background: rgba(0, 0, 0, 0.5);
            border-radius: 50%;
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

        .modal-close:hover {
            background: rgba(0, 0, 0, 0.8);
            transform: scale(1.1);
        }

        .modal-nav {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            background: rgba(0, 0, 0, 0.5);
            color: white;
            border: none;
            font-size: 30px;
            padding: 15px 20px;
            cursor: pointer;
            border-radius: 5px;
            transition: all 0.3s ease;
            z-index: 10000;
        }

        .modal-nav:hover {
            background: rgba(0, 0, 0, 0.8);
            transform: translateY(-50%) scale(1.1);
        }

        .modal-nav.prev {
            left: 30px;
        }

        .modal-nav.next {
            right: 30px;
        }

        .modal-nav:disabled {
            opacity: 0.3;
            cursor: not-allowed;
        }

        .modal-nav:disabled:hover {
            transform: translateY(-50%) scale(1);
            background: rgba(0, 0, 0, 0.5);
        }

        .modal-info {
            position: absolute;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            color: white;
            background: rgba(0, 0, 0, 0.7);
            padding: 10px 20px;
            border-radius: 20px;
            font-size: 14px;
            z-index: 10000;
        }

        .clickable-image {
            cursor: zoom-in;
            transition: transform 0.2s ease;
        }

        .clickable-image:hover {
            transform: scale(1.02);
        }

        /* Footer */
        .footer {
            background-color: #2c2c2c;
            color: #f9f6f0;
            text-align: center;
            padding: 2rem;
            margin-top: 4rem;
        }

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

        /* Responsive */
        @media (max-width: 768px) {
            .content-page {
                padding: 2rem 1rem;
            }
            
            .nav-container {
                flex-direction: column;
                gap: 1rem;
            }

            .nav-menu {
                flex-wrap: wrap;
                justify-content: center;
                gap: 1rem;
            }

            .hero h1 {
                font-size: 2.5rem;
            }

            .hero .subtitle {
                font-size: 1.4rem;
            }

            .hero {
                padding: 3rem 1rem;
                margin: 1rem;
            }

            .sheet-music-container {
                height: 500px;
            }

            .sheet-navigation {
                flex-direction: column;
                gap: 1rem;
            }

            .book-page h2 {
                font-size: 2rem;
                margin-bottom: 2rem;
            }

            .project-card {
                padding: 2rem;
                margin-bottom: 2rem;
            }

            .project-card h3 {
                font-size: 1.8rem;
                margin-bottom: 1.5rem;
            }

            .book-navigation {
                flex-direction: row;
                gap: 1rem;
                padding: 1rem 1.5rem;
                margin: 2rem auto 1rem;
                max-width: 300px;
            }

            .bottom-right-image {
                max-width: 100%;
                margin: 2rem auto;
            }
            
            .project-card:has(.bottom-right-image) {
                padding-bottom: 2rem;
            }

            .musical-portfolio {
                font-size: 1.5rem;
            }

            .profile-main {
                grid-template-columns: 1fr;
                height: auto;
            }
            
            .profile-left {
                border-right: none;
                border-bottom: 2px solid #d4af37;
                padding: 1.5rem;
            }
            
            .profile-image-container {
                width: 140px;
                height: 170px;
            }
            
            .achievements-section {
                display: flex;
                gap: 0.5rem;
                align-items: center;
                flex-wrap: wrap;
                justify-content: center;
            }
            
            .achievements-title {
                width: 100%;
                margin-bottom: 0.8rem;
            }
            
            .achievement-item {
                margin-bottom: 0;
                flex: 1;
                min-width: 120px;
            }
            
            .profile-right {
                padding: 1.5rem;
            }

            .video-container {
                padding-bottom: 56.25%;
                margin: 2rem auto;
            }
            
            .video-project h3 {
                font-size: 1.5rem;
            }
            
            .video-project p {
                font-size: 0.95rem;
                padding: 0 1rem;
            }

            .planning-navigation {
                gap: 0.8rem;
                margin-top: 1.5rem;
            }
            
            .planning-nav-btn {
                padding: 10px 15px !important;
                font-size: 0.9rem !important;
            }
            
            .planning-nav-btn .nav-text {
                display: none;
            }
            
            .planning-nav-btn .nav-arrow {
                font-size: 16px;
            }
            
            .planning-page-indicator {
                padding: 8px 15px;
                font-size: 0.85rem;
                min-width: 80px;
            }

            .learning-memo-container {
                height: 400px;
            }
            
            .memo-navigation {
                gap: 0.8rem;
                margin-top: 1.5rem;
            }
            
            .memo-nav-btn {
                padding: 10px 15px !important;
                font-size: 0.9rem !important;
            }
            
            .memo-nav-btn .nav-text {
                display: none;
            }
            
            .memo-nav-btn .nav-arrow {
                font-size: 16px;
            }
            
            .memo-page {
                padding: 0.5rem;
            }
            
            .learning-memo-title {
                font-size: 1.1rem;
            }
            
            .learning-memo-subtitle {
                font-size: 0.9rem;
            }
            
            .memo-page-indicator {
                padding: 8px 15px;
                font-size: 0.85rem;
                min-width: 80px;
            }

            .debug-scroll-container {
                max-height: 60vh;
                padding: 1rem;
            }
            
            .debug-header {
                padding: 0.8rem 1rem;
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
            }
            
            .debug-header h4 {
                font-size: 1rem;
            }
            
            .debug-date {
                font-size: 0.75rem;
                align-self: flex-end;
            }
            
            .debug-content {
                padding: 1rem;
            }
            
            .debug-section {
                font-size: 0.9rem;
            }
            
            .code-block {
                font-size: 0.8rem;
                padding: 0.8rem;
            }

            .modal-close {
                top: 10px;
                right: 15px;
                font-size: 30px;
                width: 40px;
                height: 40px;
            }
            
            .modal-nav {
                font-size: 24px;
                padding: 10px 15px;
            }
            
            .modal-nav.prev {
                left: 15px;
            }
            
            .modal-nav.next {
                right: 15px;
            }
            
            .modal-info {
                bottom: 10px;
                font-size: 12px;
                padding: 8px 16px;
            }
        }

        /* 페이지 전환 효과 */
        .page-transition {
            opacity: 0;
            transform: translateY(20px);
            transition: all 0.3s ease;
        }

        .page-transition.active {
            opacity: 1;
            transform: translateY(0);
        }

        



        .golden-glow {
    color: #c9a876; /* 더 연한 골드 색상 */
    text-shadow: 
        0 0 3px rgba(201, 168, 118, 0.4),
        0 0 6px rgba(201, 168, 118, 0.3),
        0 0 9px rgba(201, 168, 118, 0.2);
    animation: subtle-glow 3s ease-in-out infinite alternate;
}

@keyframes subtle-glow {
    from {
        text-shadow: 
            0 0 2px rgba(201, 168, 118, 0.3),
            0 0 4px rgba(201, 168, 118, 0.2),
            0 0 6px rgba(201, 168, 118, 0.1);
    }
    to {
        text-shadow: 
            0 0 4px rgba(201, 168, 118, 0.5),
            0 0 8px rgba(201, 168, 118, 0.4),
            0 0 12px rgba(201, 168, 118, 0.3);
    }
}



/* Message Page Styles */
.message-content {
    background: linear-gradient(135deg, #faf8f3 0%, #f5f2e8 100%);
    border: 2px solid #d4af37;
    border-radius: 16px;
    padding: 3rem;
    margin: 2rem auto;
    max-width: 800px;
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.15);
    position: relative;
    overflow: hidden;
}

.message-content::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.05) 0%, transparent 70%);
    z-index: 0;
}

.message-content > * {
    position: relative;
    z-index: 1;
}

.message-title {
    font-size: 2.5rem;
    color: #8b6914;
    font-weight: 600;
    text-align: center;
    margin-bottom: 2rem;
    letter-spacing: 2px;
    text-shadow: 0 2px 4px rgba(139, 105, 20, 0.1);
}

.message-text {
    color: #654321;
    font-size: 1.1rem;
    line-height: 1.8;
    font-weight: 500;
    text-align: center;
    margin-bottom: 2rem;
    padding: 0 1rem;
}

.message-signature {
    color: #8b6914;
    font-size: 1.3rem;
    font-weight: 600;
    text-align: center;
    margin: 1.5rem 0;
    font-style: italic;
}

.message-contact {
    color: #a0742d;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(212, 175, 55, 0.08);
    border-radius: 12px;
    border: 1px solid rgba(212, 175, 55, 0.2);
}

.message-contact a {
    color: #8b6914;
    text-decoration: underline;
    font-weight: 600;
    transition: color 0.3s ease;
}

.message-contact a:hover {
    color: #654321;
}

@media (max-width: 768px) {
    .message-content {
        padding: 2rem 1.5rem;
        margin: 1rem;
    }
    
    .message-title {
        font-size: 2rem;
    }
    
    .message-text {
        font-size: 1rem;
        padding: 0;
    }
    
    .message-signature {
        font-size: 1.1rem;
    }
    
    .message-contact {
        font-size: 0.9rem;
        padding: 1rem;
    }
}


/*1794