/* 수학 페이지 전용 스타일 - 2022 교육과정 기준 */

.math-main {
    padding-top: 70px;
}

/* 인라인 스타일 대체 클래스들 */
.navbar-hidden {
    display: none;
}

.footer-spacer {
    height: 100px;
}

/* 카드 배경 이미지 클래스들 */
.card-bg-01 {
    background-image: url('../high/grade2/image/01.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-02 {
    background-image: url('../high/grade2/image/02.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-03 {
    background-image: url('../high/grade2/image/03.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-04 {
    background-image: url('../high/grade2/image/04.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-05 {
    background-image: url('../high/grade2/image/05.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-06 {
    background-image: url('../high/grade2/image/06.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-07 {
    background-image: url('../high/grade2/image/07.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* 결과 박스 표시/숨김 */
.result-box-hidden {
    display: none;
}

.solution-detail-hidden {
    display: none;
}

/* 히어로 섹션 업데이트 */
.curriculum-areas {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 32px;
}

.area-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    border: 2px solid;
    transition: var(--transition);
}

.area-badge.numbers {
    background: rgba(255, 107, 53, 0.1);
    color: var(--primary-color);
    border-color: rgba(255, 107, 53, 0.3);
}

.area-badge.shapes {
    background: rgba(46, 204, 113, 0.1);
    color: #2ECC71;
    border-color: rgba(46, 204, 113, 0.3);
}

.area-badge.relations {
    background: rgba(74, 144, 226, 0.1);
    color: #4A90E2;
    border-color: rgba(74, 144, 226, 0.3);
}

.area-badge.data {
    background: rgba(155, 89, 182, 0.1);
    color: #9B59B6;
    border-color: rgba(155, 89, 182, 0.3);
}

.area-icon {
    font-size: 16px;
}

/* 새로운 학년 카드 디자인 */
.grades-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 32px;
    max-width: 1400px;
    margin: 0 auto;
}

.grade-item {
    background: var(--bg-card);
    border-radius: var(--border-radius-large);
    padding: 32px;
    box-shadow: var(--shadow-light);
    border: 2px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.grade-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transform: scaleX(0);
    transition: var(--transition);
}

.grade-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-color);
}

.grade-item:hover::before {
    transform: scaleX(1);
}

/* 학년 헤더 */
.grade-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.grade-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.grade-title h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.grade-desc {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 주제 영역 */
.grade-topics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

.topic-area {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 16px;
    border-left: 4px solid;
}

.topic-area.numbers {
    border-left-color: var(--primary-color);
}

.topic-area.shapes {
    border-left-color: #2ECC71;
}

.topic-area.relations {
    border-left-color: #4A90E2;
}

.topic-area.data {
    border-left-color: #9B59B6;
}

.topic-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.topic-icon {
    font-size: 16px;
}

.topic-header strong {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.topic-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.topic-list span {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 4px 8px;
    background: var(--bg-card);
    border-radius: 6px;
    line-height: 1.3;
}

/* 학습 시작 버튼 */
.grade-action {
    text-align: center;
}

.start-learning {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border: none;
    padding: 12px 32px;
    border-radius: 24px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
}

.start-learning:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* 중고등학교 간략 버전 */
.simple-grades {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.simple-grade-item {
    background: var(--bg-card);
    border-radius: var(--border-radius-large);
    padding: 32px;
    box-shadow: var(--shadow-light);
    border: 2px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.simple-grade-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.simple-header {
    margin-bottom: 16px;
}

.simple-number {
    display: inline-block;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--text-secondary), #95a5a6);
    color: white;
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}

.simple-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.simple-grade-item p {
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
}

.coming-soon-badge {
    display: inline-block;
    background: var(--text-secondary);
    color: white;
    padding: 6px 16px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
}

/* 반응형 디자인 */
@media (max-width: 1024px) {
    .grades-grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: 24px;
    }
    
    .grade-topics {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

@media (max-width: 768px) {
    .curriculum-areas {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .area-badge {
        font-size: 13px;
        padding: 8px 12px;
    }
    
    .grades-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .grade-item {
        padding: 24px;
    }
    
    .grade-header {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .grade-number {
        width: 50px;
        height: 50px;
        font-size: 18px;
    }
    
    .topic-area {
        padding: 12px;
    }
    
    .topic-list span {
        font-size: 12px;
    }
    
    .simple-grades {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .simple-grade-item {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .curriculum-areas {
        grid-template-columns: 1fr;
    }
    
    .grade-item {
        padding: 20px;
    }
    
    .grade-topics {
        gap: 12px;
    }
    
    .topic-area {
        padding: 10px;
    }
    
    .start-learning {
        padding: 10px 24px;
        font-size: 13px;
    }
}

/* 기존 스타일 유지 */
.math-hero {
    padding: 80px 0;
    background: linear-gradient(135deg, 
        rgba(255, 107, 53, 0.1) 0%, 
        rgba(255, 136, 89, 0.05) 50%, 
        rgba(248, 249, 250, 1) 100%);
    position: relative;
    overflow: hidden;
}

.math-hero::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="math-pattern" width="20" height="20" patternUnits="userSpaceOnUse"><text x="10" y="15" text-anchor="middle" font-size="12" fill="%23FF6B35" opacity="0.05">∑</text></pattern></defs><rect width="100" height="100" fill="url(%23math-pattern)"/></svg>');
}

.math-hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.breadcrumb {
    margin-bottom: 24px;
    font-size: 14px;
    color: var(--text-secondary);
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb span {
    margin: 0 8px;
}

.math-hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.math-hero p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

/* 학년 선택 섹션 */
.grade-selection {
    padding: 80px 0;
    background: var(--bg-primary);
}

.grade-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
    background: var(--bg-secondary);
    padding: 8px;
    border-radius: 16px;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.grade-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    border: none;
    background: transparent;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
    font-weight: 500;
    color: var(--text-secondary);
}

.grade-tab.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-light);
}

.grade-tab:hover:not(.active) {
    background: var(--bg-card);
    color: var(--text-primary);
}

.tab-icon {
    font-size: 20px;
}

/* 학년 콘텐츠 */
.grade-content {
    display: none;
}

.grade-content.active {
    display: block;
}

/* 학습 접근법 섹션은 기존과 동일 */
.learning-approach {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.approach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.approach-card {
    background: var(--bg-card);
    padding: 40px;
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.approach-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    transition: var(--transition);
    transform: scaleX(0);
}

.approach-card.visual::before {
    background: linear-gradient(90deg, #4A90E2, #5BA0F2);
}

.approach-card.practical::before {
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
}

.approach-card.logical::before {
    background: linear-gradient(90deg, #2ECC71, #3ED97A);
}

.approach-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
}

.approach-card:hover::before {
    transform: scaleX(1);
}

.approach-icon {
    font-size: 48px;
    margin-bottom: 24px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.approach-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.approach-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.approach-example {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.visual-demo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.demo-graph {
    width: 80px;
    height: 60px;
    background: linear-gradient(45deg, var(--primary-color), var(--primary-light));
    border-radius: 8px;
    position: relative;
}

.demo-graph::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 20%;
    width: 60%;
    height: 2px;
    background: white;
    transform: translateY(-50%) rotate(15deg);
}

.practical-demo {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.practical-demo span {
    background: var(--bg-card);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-primary);
}

.logical-demo {
    text-align: left;
}

.formula-step {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.formula-step span {
    background: var(--bg-card);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-primary);
    position: relative;
}

.formula-step span:not(:last-child)::after {
    content: '↓';
    position: absolute;
    right: -8px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary-color);
    font-size: 16px;
}

/* 인라인 스타일 대체 클래스들 */
.navbar-hidden {
    display: none;
}

.footer-spacer {
    height: 100px;
}

/* 결과 박스 표시/숨김 */
.result-box-hidden {
    display: none;
}

.solution-detail-hidden {
    display: none;
}

/* 카드 배경 이미지 클래스들 - 초등학교 */
.card-bg-grade1-9 {
    background-image: url('../elem/grade1/image/grade1-9.webp');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-grade1-shape {
    background-image: url('../elem/grade1/image/grade1-shape.webp');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-grade1-addition-subtraction {
    background-image: url('../elem/grade1/image/grade1-addition-subtraction.webp');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* 카드 배경 이미지 클래스들 - 고등학교 2학년 */
.card-bg-01 {
    background-image: url('../high/grade2/image/01.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-02 {
    background-image: url('../high/grade2/image/02.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-03 {
    background-image: url('../high/grade2/image/03.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-04 {
    background-image: url('../high/grade2/image/04.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-05 {
    background-image: url('../high/grade2/image/05.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-06 {
    background-image: url('../high/grade2/image/06.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-07 {
    background-image: url('../high/grade2/image/07.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* 카드 배경 이미지 클래스들 - 초등학교 6학년 */
.card-bg-grade6-01 {
    background-image: url('../elem/grade6/image/01.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-grade6-02 {
    background-image: url('../elem/grade6/image/02.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-grade6-03 {
    background-image: url('../elem/grade6/image/03.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-grade6-04 {
    background-image: url('../elem/grade6/image/04.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-grade6-05 {
    background-image: url('../elem/grade6/image/05.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-grade6-06 {
    background-image: url('../elem/grade6/image/06.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-grade6-07 {
    background-image: url('../elem/grade6/image/07.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-grade6-08 {
    background-image: url('../elem/grade6/image/08.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-grade6-09 {
    background-image: url('../elem/grade6/image/09.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-grade6-10 {
    background-image: url('../elem/grade6/image/10.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-grade6-11 {
    background-image: url('../elem/grade6/image/11.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.card-bg-grade6-12 {
    background-image: url('../elem/grade6/image/12.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}
/* �ζ��� ��Ÿ�� ��ü Ŭ������ */
.navbar-hidden { display: none; }
.footer-spacer { height: 100px; }
.result-hidden { display: none; }
.list-style-none { list-style: none; padding-left: 0; }

/* �ʵ��б� 1�г� ī�� ��� �̹��� */
.card-bg-grade1-9 { background-image: url('../elem/grade1/image/grade1-9.webp'); background-size: cover; background-position: center; background-repeat: no-repeat; }
.card-bg-grade1-shape { background-image: url('../elem/grade1/image/grade1-shape.webp'); background-size: cover; background-position: center; background-repeat: no-repeat; }
.card-bg-grade1-addition-subtraction { background-image: url('../elem/grade1/image/grade1-addition-subtraction.webp'); background-size: cover; background-position: center; background-repeat: no-repeat; }
/* �3 ȩ� ����|� ��� */

.grade3-primary { color: #6A1B9A; }

.grade3-bg { background: linear-gradient(135deg, #6A1B9A, #9C27B0); }

.btn-high { background: #6A1B9A; color: white; border: none; padding: 12px 24px; border-radius: 8px; font-weight: 600; transition: all 0.3s ease; }