/* 전체 페이지 스타일 초기화 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    overflow-x: hidden;
    position: relative;
}

/* 배경 장식 요소 추가 */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    transform: rotate(30deg);
    z-index: 0;
}

/* 메인 래퍼 */
.main-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
    position: relative;
    z-index: 1;
}

/* 모든 주요 컨테이너 통일된 너비 */
.content-container {
    max-width: 700px;
    width: 100%;
    margin: 0 auto;
}

/* 히어로 섹션 */
.hero-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 60px 48px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    text-align: center;
    margin-bottom: 40px;
    animation: slideDown 0.6s ease-out;
    position: relative;
    overflow: hidden;
}

/* 히어로 배경 장식 */
.hero-section::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-section h1 {
    font-size: 2.8rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
    font-weight: 700;
    position: relative;
}

.hero-section p {
    color: #666;
    font-size: 1.2rem;
    line-height: 1.6;
    position: relative;
}

/* 메인 일러스트 아이콘 */
.hero-icon {
    font-size: 80px;
    margin-bottom: 24px;
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* AI 프로모션 배너 개선 */
.ai-banner {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    padding: 24px 32px;
    border-radius: 16px;
    margin: 24px 0;
    display: flex;
    align-items: center;
    gap: 20px;
    animation: pulse 2s infinite;
    box-shadow: 0 10px 30px rgba(240, 87, 108, 0.3);
}

/* PC에서 중앙 정렬 */
@media (min-width: 769px) {
    .ai-banner {
        flex-direction: column;
        text-align: center;
        padding: 40px 48px;
        gap: 16px;
    }
    
    .ai-banner-icon {
        font-size: 3.5rem !important;
        margin: 0 auto;
    }
    
    .ai-banner-content {
        text-align: center;
    }
    
    .ai-banner-content h3 {
        font-size: 1.5rem !important;
        margin-bottom: 8px;
    }
    
    .ai-banner-content p {
        font-size: 1.1rem !important;
        line-height: 1.5;
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); box-shadow: 0 10px 30px rgba(240, 87, 108, 0.3); }
    50% { transform: scale(1.02); box-shadow: 0 15px 40px rgba(240, 87, 108, 0.4); }
}

.ai-banner-icon {
    font-size: 2.5rem;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
}

.ai-banner-content h3 {
    font-size: 1.3rem;
    margin-bottom: 4px;
    font-weight: 700;
}

.ai-banner-content p {
    font-size: 1rem;
    opacity: 0.95;
    line-height: 1.4;
}

/* 모바일에서만 줄바꿈 표시 */
.mobile-only {
    display: none;
}

@media (max-width: 768px) {
    .mobile-only {
        display: inline;
    }
}

/* 로그인 컨테이너 */
.login-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 48px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    animation: slideUp 0.6s ease-out;
    margin-bottom: 40px;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 특징 소개 섹션 (개선) */
.features-section {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 60px 48px;
    margin-bottom: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.8s ease-out 0.2s both;
}

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

.features-section h2 {
    text-align: center;
    font-size: 2.2rem;
    color: #333;
    margin-bottom: 48px;
    position: relative;
}

.features-section h2::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

/* 개선된 feature-card 스타일 */
.feature-card {
    background: white;
    padding: 40px 32px;
    border-radius: 20px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid #f0f0f0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    border-color: #667eea;
    background: linear-gradient(135deg, #fafbff 0%, #f5f3ff 100%);
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.15);
}

.feature-icon {
    font-size: 4rem;
    margin-bottom: 24px;
    display: block;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
    animation: float 3s ease-in-out infinite;
}

.feature-card:nth-child(1) .feature-icon { animation-delay: 0s; }
.feature-card:nth-child(2) .feature-icon { animation-delay: 0.5s; }
.feature-card:nth-child(3) .feature-icon { animation-delay: 1s; }
.feature-card:nth-child(4) .feature-icon { animation-delay: 1.5s; }

.feature-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.05) 0%, transparent 70%);
    transform: rotate(45deg);
    opacity: 0;
    transition: opacity 0.4s;
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-card h3 {
    font-size: 1.4rem;
    color: #1a1a1a;
    margin-bottom: 12px;
    font-weight: 700;
}

.feature-card p {
    color: #555;
    line-height: 1.7;
    font-size: 0.95rem;
}

/* 입력 필드 스타일 */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input {
    width: 100% !important;
    padding: 14px 20px !important;
    border: 2px solid #e9ecef !important;
    border-radius: 12px !important;
    font-size: 1rem !important;
    transition: all 0.3s !important;
    background: white !important;
}

.form-group input:focus {
    outline: none !important;
    border-color: #667eea !important;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1) !important;
}

/* 제출 버튼 */
.submit-button {
    width: 100% !important;
    padding: 16px !important;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white !important;
    border: none !important;
    border-radius: 12px !important;
    font-size: 1.1rem !important;
    font-weight: 600 !important;
    cursor: pointer !important;
    transition: all 0.3s !important;
    margin-top: 32px !important;
    position: relative !important;
    overflow: hidden !important;
}

.submit-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: left 0.5s;
}

.submit-button:hover::before {
    left: 100%;
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4) !important;
}

/* 동의 텍스트 */
.consent-text {
    font-size: 0.85rem !important;
    color: #666 !important;
    text-align: center !important;
    margin-top: 16px !important;
    line-height: 1.5 !important;
}

/* 에러 메시지 */
.error {
    background: #f8d7da;
    color: #721c24;
    padding: 12px 20px;
    border-radius: 8px;
    margin-top: 16px;
    font-size: 0.9rem;
    text-align: center;
    display: none;
}

/* 링크 섹션 개선 */
.links-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 60px 48px;
    margin-bottom: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.8s ease-out 0.4s both;
}

.links-section h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 48px;
    color: #333;
    position: relative;
}

.links-section h3::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);  /* PC에서 3열로 변경 */
    gap: 24px;
}

.link-wrapper {
    background: white;
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
    text-decoration: none;
    display: block;
    color: inherit;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 1px solid #f0f0f0;
    position: relative;
    overflow: hidden;
}

.link-wrapper:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.1);
    border-color: #e9ecef;
}

/* HOT 아이템 스타일 */
.link-wrapper.hot-item {
    border: 2px solid #ff4757;
    box-shadow: 0 4px 20px rgba(255, 71, 87, 0.15);
}

.link-wrapper.hot-item:hover {
    box-shadow: 0 16px 32px rgba(255, 71, 87, 0.2);
    border-color: #ff4757;
}

.hot-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: linear-gradient(135deg, #ff4757 0%, #ff6b6b 100%);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    animation: pulse-hot 2s infinite;
    z-index: 10;
}

@keyframes pulse-hot {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.link-wrapper img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 16px;
}

.link-wrapper p {
    font-weight: 500;
    color: #333;
    font-size: 0.95rem;
}

/* 환영 메시지 섹션 */
.welcome-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 48px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    text-align: center;
    animation: slideUp 0.6s ease-out;
    margin-bottom: 40px;
}

.welcome-section h2 {
    font-size: 2rem;
    color: #333;
    margin-bottom: 16px;
}

.button-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 32px;
}

.button-group button {
    padding: 14px 32px !important;
    border-radius: 12px !important;
    font-size: 1rem !important;
    font-weight: 500 !important;
    cursor: pointer !important;
    transition: all 0.3s !important;
    border: none !important;
}

.primary-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white !important;
}

.secondary-button {
    background: #f8f9fa !important;
    color: #333 !important;
    border: 2px solid #e9ecef !important;
}

/* 책 홍보 섹션 스타일 */
.book-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 60px 48px;
    margin-bottom: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.8s ease-out 0.6s both;
}

.book-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 48px;
    color: #333;
    position: relative;
}

.book-section h2::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

/* 책 이미지들 - 세로로 나열 */
.book-images-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 40px;
}

.book-detail-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.book-detail-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

/* 책 설명 */
.book-description-box {
    background: #f8f9fa;
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 32px;
}

.book-title {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 24px;
    text-align: center;
    font-weight: 700;
}

.book-content {
    color: #555;
    line-height: 1.8;
}

.book-headline {
    font-size: 1.2rem;
    font-weight: 600;
    color: #667eea;
    text-align: center;
    margin-bottom: 24px;
}

.book-subtitle {
    font-size: 1.1rem;
    text-align: center;
    margin-bottom: 24px;
    color: #666;
}

.book-features {
    background: white;
    border-radius: 12px;
    padding: 24px;
    margin: 24px 0;
}

.book-features ul {
    list-style: none;
    padding: 0;
}

.book-features li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
}

.book-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

.book-quote {
    font-style: italic;
    background: #f8f9fa;
    padding: 20px;
    border-left: 4px solid #667eea;
    margin: 20px 0;
}

.book-conclusion {
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
    color: #667eea;
    margin-top: 30px;
}

/* 유튜브 영상 섹션 */
.book-videos {
    margin-top: 40px;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.video-card {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.video-card iframe {
    width: 100%;
    height: 200px;
    border: none;
}

/* 구매 링크 */
.purchase-section {
    text-align: center;
    margin-top: 40px;
}

.purchase-section h3 {
    font-size: 1.3rem;
    margin-bottom: 24px;
    color: #333;
}

.purchase-links {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.purchase-btn {
    padding: 12px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s;
}

.purchase-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

/* 블로그 리뷰 섹션 */
.blog-review-section {
    margin-top: 40px;
}

.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.review-card {
    background: white;
    border-radius: 16px;
    padding: 24px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 1px solid #f0f0f0;
}

.review-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
    border-color: #667eea;
}

.review-card-inner {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.review-icon-wrapper {
    text-align: center;
    margin-bottom: 16px;
}

.review-icon {
    font-size: 2rem;
}

.review-content {
    flex: 1;
}

.review-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
}

.review-author {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 12px;
}

.author-icon {
    font-size: 0.8rem;
}

.review-excerpt {
    font-size: 0.9rem;
    color: #555;
    line-height: 1.6;
    margin-bottom: 16px;
}

.review-action {
    text-align: right;
}

.read-more {
    color: #667eea;
    font-weight: 500;
    font-size: 0.9rem;
}

/* 기사 섹션 */
.article-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 60px 48px;
    margin-bottom: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.8s ease-out 0.8s both;
}

.article-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 48px;
    color: #333;
    position: relative;
}

.article-section h2::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.article-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    text-decoration: none;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 1px solid #f0f0f0;
    display: block;
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.article-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.article-content {
    padding: 24px;
}

.article-content h3 {
    font-size: 1.1rem;
    color: #333;
    margin-bottom: 12px;
    line-height: 1.4;
}

.article-content p {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Footer */
.footer-links {
    background: rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    padding: 40px 0;
    margin-top: 60px;
    width: 100%;
}

.footer-links .links-container {
    text-align: center;
    margin-bottom: 20px;
}

.footer-links a {
    color: white !important;
    text-decoration: none;
    margin: 0 15px;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 1;
}

.copyright {
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* 반응형 - 통합된 모바일 스타일 */
@media (max-width: 768px) {
    body {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
        min-height: 100vh !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    
    .main-wrapper {
        padding: 20px 10px 0 10px !important;
        min-height: 100vh !important;
        justify-content: flex-start !important;
    }
    
    /* 첫 화면을 정확히 100vh로 설정 */
    .hero-section,
    .login-container,
    .welcome-section,
    .features-section,
    .links-section,
    .book-section,
    .article-section {
        margin: 0 auto !important;
        width: 100% !important;
        max-width: 100% !important;
    }
    
    /* 히어로 섹션 - 더 컴팩트하게 */
    .hero-section {
        padding: 20px 16px !important;
        margin-bottom: 20px !important;
        animation: none !important;
    }
    
    .hero-icon {
        font-size: 60px;
        margin-bottom: 16px;
    }
    
    .hero-section h1 {
        font-size: 1.8rem !important;
        margin-bottom: 10px !important;
    }
    
    .hero-section p {
        font-size: 0.95rem !important;
        line-height: 1.4 !important;
    }
    
    /* 로그인 컨테이너 - 공간 최적화 */
    .login-container {
        padding: 20px 16px !important;
        animation: none !important;
        margin-bottom: 20px !important;
    }
    
    /* AI 배너 - 높이와 여백 증가 */
    .ai-banner {
        padding: 16px 18px !important;
        margin: 16px 0 !important;
        gap: 10px !important;
        min-height: 80px !important;
        align-items: center !important;
    }
    
    /* AI 배너 애니메이션 범위 확대 */
    @keyframes pulse {
        0%, 100% { 
            transform: scale(1); 
            padding-top: 16px;
            padding-bottom: 16px;
        }
        50% { 
            transform: scale(1.03);
            padding-top: 18px;
            padding-bottom: 18px;
        }
    }
    
    .ai-banner-icon {
        font-size: 1.8rem !important;
    }
    
    .ai-banner-content {
        flex: 1 !important;
    }
    
    .ai-banner-content h3 {
        font-size: 1.05rem !important;
        margin-bottom: 4px !important;
    }
    
    .ai-banner-content p {
        font-size: 0.85rem !important;
        line-height: 1.3 !important;
    }
    
    /* 특징 섹션 - 모바일 최적화 */
    .features-section {
        padding: 24px 16px !important;
        margin-bottom: 20px !important;
    }
    
    .features-section h2 {
        font-size: 1.5rem !important;
        margin-bottom: 32px !important;
    }
    
    .features-grid {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }
    
    .feature-card {
        padding: 24px 20px !important;
        border-radius: 16px !important;
        margin-bottom: 0 !important;
    }
    
    .feature-icon {
        font-size: 2.5rem !important;
        margin-bottom: 16px !important;
        animation: none !important;
    }
    
    .feature-card h3 {
        font-size: 1.2rem !important;
        margin-bottom: 8px !important;
    }
    
    .feature-card p {
        font-size: 0.9rem !important;
        line-height: 1.5 !important;
    }
    
    .feature-card:hover {
        transform: none !important;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06) !important;
    }
    
    .feature-card::before {
        display: none !important;
    }
    
    /* 폼 그룹 - 간격 축소 */
    .form-group {
        margin-bottom: 16px !important;
    }
    
    .form-group label {
        font-size: 0.9rem !important;
        margin-bottom: 6px !important;
    }
    
    .form-group input {
        padding: 12px 16px !important;
        font-size: 0.95rem !important;
    }
    
    /* 제출 버튼 - 마진 조정 */
    .submit-button {
        margin-top: 20px !important;
        padding: 14px !important;
        font-size: 1rem !important;
    }
    
    /* 동의 텍스트 */
    .consent-text {
        font-size: 0.8rem !important;
        margin-top: 12px !important;
    }
    
    /* 환영 섹션 */
    .welcome-section {
        padding: 20px 16px !important;
        margin-bottom: 20px !important;
    }
    
    .welcome-section h2 {
        font-size: 1.5rem !important;
    }
    
    /* 버튼 그룹 */
    .button-group {
        margin-top: 20px !important;
    }
    
    .button-group button {
        padding: 12px 24px !important;
        font-size: 0.95rem !important;
    }
    
    /* 링크 섹션 - 2열 그리드 */
    .links-section {
        padding: 24px 16px !important;
        margin-bottom: 20px !important;  /* 상하 여백 통일 */
        /* width: 100% !important; */
        /* max-width: calc(100% - 40px) !important; */
    }
    
    .links-section h3 {
        font-size: 1.5rem !important;
        margin-bottom: 24px !important;
    }
    
    .links-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
    }
    
    .link-wrapper {
        padding: 16px 12px !important;
    }
    
    .link-wrapper img {
        height: 80px !important;
        margin-bottom: 10px !important;
    }
    
    .link-wrapper p {
        font-size: 0.85rem !important;
        line-height: 1.2 !important;
    }
    
    /* 푸터 - 링크가 잘리지 않도록 */
    .footer-links {
        padding: 24px 10px !important;
        margin-top: 30px !important;
        margin-bottom: 0 !important;
    }
    
    .footer-links .links-container {
        padding: 0 10px !important;
        line-height: 2 !important;
        display: flex !important;
        flex-wrap: wrap !important;
        justify-content: center !important;
        align-items: center !important;
    }
    
    .footer-links a {
        margin: 0 8px !important;
        font-size: 0.85rem !important;
        display: inline-block !important;
        white-space: nowrap !important;
    }
    
    /* 모바일에서 구분선 제거하고 줄바꿈 */
    .footer-links .links-container a:not(:last-child)::after {
        content: "" !important;
    }
    
    .copyright {
        font-size: 0.8rem !important;
        padding: 0 20px !important;
        margin-top: 10px !important;
    }
    
    /* 책 섹션 모바일 */
    .book-section {
        padding: 24px 16px !important;
        margin-bottom: 20px !important;
    }
    
    .book-section h2 {
        font-size: 1.5rem !important;
        margin-bottom: 32px !important;
    }
    
    .book-images-grid {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }
    
    .book-detail-image {
        width: 100% !important;
    }
    
    .book-description-box {
        padding: 20px !important;
    }
    
    .book-title {
        font-size: 1.2rem !important;
    }
    
    .book-headline {
        font-size: 1.1rem !important;
    }
    
    .purchase-links {
        flex-direction: column !important;
    }
    
    .purchase-btn {
        width: 100% !important;
    }
    
    .video-grid {
        grid-template-columns: 1fr !important;
    }
    
    .review-grid {
        grid-template-columns: 1fr !important;
    }
    
    /* 기사 섹션 모바일 */
    .article-section {
        padding: 24px 16px !important;
        margin-bottom: 20px !important;
    }
    
    .article-section h2 {
        font-size: 1.5rem !important;
        margin-bottom: 32px !important;
    }
    
    .article-grid {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }
    
    .article-card img {
        height: 150px !important;
    }
    
    .article-content {
        padding: 16px !important;
    }
    
    .article-content h3 {
        font-size: 1rem !important;
    }
    
    .article-content p {
        font-size: 0.85rem !important;
    }

    /* 입력 필드 컨테이너 */
    .input-container {
        position: relative;
        margin-bottom: 24px;
    }

    /* 입력 필드 개선 (기존 스타일 유지하면서 약간만 개선) */
    .input-enhanced {
        width: 100% !important;
        padding: 16px 20px !important;
        border: 2px solid #e9ecef !important;
        border-radius: 12px !important;
        font-size: 1.05rem !important;
        transition: all 0.3s ease !important;
        background: white !important;
        position: relative;
        z-index: 2;
    }

    .input-enhanced:focus {
        outline: none !important;
        border-color: #667eea !important;
        transform: translateY(-1px) !important;
        box-shadow: 0 6px 20px rgba(102, 126, 234, 0.15) !important;
    }

    .input-enhanced::placeholder {
        color: #999 !important;
        opacity: 1 !important;
        font-style: italic !important;
    }

    /* 포커스 시 하이라이트 효과 */
    .input-highlight {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        border-radius: 12px;
        background: linear-gradient(135deg, #667eea, #764ba2);
        opacity: 0;
        transition: all 0.3s ease;
        z-index: 1;
        pointer-events: none;
    }

    .input-enhanced:focus + .input-highlight {
        opacity: 0.05;
        transform: scale(1.01);
    }

    /* 버튼 개선 (기존 스타일 베이스로) */
    .submit-button-enhanced {
        width: 100% !important;
        padding: 16px !important;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
        color: white !important;
        border: none !important;
        border-radius: 12px !important;
        font-size: 1.1rem !important;
        font-weight: 600 !important;
        cursor: pointer !important;
        transition: all 0.3s ease !important;
        margin-top: 24px !important;
        position: relative !important;
        overflow: hidden !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 8px !important;
    }

    .submit-button-enhanced::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: rgba(255, 255, 255, 0.2);
        transition: left 0.5s ease;
    }

    .submit-button-enhanced:hover::before {
        left: 100%;
    }

    .submit-button-enhanced:hover {
        transform: translateY(-2px) !important;
        box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4) !important;
    }

    .submit-button-enhanced:active {
        transform: translateY(0) !important;
    }

    /* 화살표 애니메이션 */
    .btn-arrow {
        transition: transform 0.3s ease;
        font-size: 1.2rem;
    }

    .submit-button-enhanced:hover .btn-arrow {
        transform: translateX(3px);
    }

    /* 모바일 대응 */
    @media (max-width: 768px) {
        .input-enhanced {
            padding: 14px 18px !important;
            font-size: 1rem !important;
        }
        
        .submit-button-enhanced {
            padding: 14px !important;
            font-size: 1rem !important;
            margin-top: 20px !important;
        }
    }
}

.guide-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 60px 48px;
    margin-bottom: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.8s ease-out 0.8s both;
}

.guide-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 48px;
    color: #333;
    position: relative;
}

.guide-section h2::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.guide-box {
    background: #f8f9fa;
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 32px;
}

.guide-list {
    display: grid;
    gap: 16px;
}

.guide-item {
    display: flex;
    gap: 12px;
    padding: 16px 20px;
    background: white;
    border-radius: 12px;
    line-height: 1.6;
    color: #555;
}

.guide-number {
    color: #667eea;
    font-weight: bold;
    font-size: 1.1rem;
}

.example-box {
    background: white;
    border-radius: 12px;
    padding: 32px;
    margin-top: 32px;
}

.tip-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 24px 32px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.tip-icon {
    font-size: 2rem;
}

.tip-content {
    flex: 1;
}

/* 모바일 */
@media (max-width: 768px) {
    .guide-section {
        padding: 24px 16px !important;
        margin-bottom: 20px !important;
    }

    .guide-section h2 {
        font-size: 1.5rem !important;
        margin-bottom: 32px !important;
    }
    
    .guide-box {
        padding: 24px 16px;
    }

    .guide-item {
        padding: 12px 16px;
        font-size: 0.9rem;
    }

    .example-box {
        padding: 20px;
    }

    .tip-box {
        padding: 20px;
        flex-direction: column;
        text-align: center;
    }
}