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

:root {
    --primary-gradient: linear-gradient(135deg, #fed6e3 0%, #764ba2 100%);
    --level-8: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    --level-7: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    --level-6: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    --level-5: linear-gradient(135deg, #fbc2eb 0%, #a6c1ee 100%);
    --level-4: linear-gradient(135deg, #fdcbf1 0%, #e6dee9 100%);
    --level-3: linear-gradient(135deg, #a1c4fd 0%, #c2e9fb 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Pretendard', 'Segoe UI', 'Malgun Gothic', sans-serif;
    background: var(--primary-gradient);
    min-height: 100vh;
    color: #333;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.header {
    text-align: center;
    padding: 40px 20px 30px;
    animation: fadeInDown 0.8s ease;
}

.title {
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 700;
    color: white;
    margin-bottom: 10px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: clamp(1rem, 3vw, 1.2rem);
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
}

/* Main Content */
.main {
    flex: 1;
    padding: 20px 0;
}

/* Card Grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
    animation: fadeInUp 0.8s ease;
}

/* Level Card */
.level-card {
    background: white;
    border-radius: 20px;
    padding: 30px;
    text-decoration: none;
    color: #333;
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.level-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.level-card.level-8::before { background: var(--level-8); }
.level-card.level-7::before { background: var(--level-7); }
.level-card.level-6::before { background: var(--level-6); }
.level-card.level-5::before { background: var(--level-5); }
.level-card.level-4::before { background: var(--level-4); }
.level-card.level-3::before { background: var(--level-3); }
.level-card.level-2::before { background: var(--level-2); }
.level-card.level-1::before { background: var(--level-1); }


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

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

.level-card:active {
    transform: translateY(-4px);
}

/* Card Header */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.level-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: white;
}

.level-8 .level-badge { background: linear-gradient(135deg, #667eea, #764ba2); }
.level-7 .level-badge { background: linear-gradient(135deg, #f093fb, #f5576c); }
.level-6 .level-badge { background: linear-gradient(135deg, #4facfe, #00f2fe); }
.level-5 .level-badge { background: linear-gradient(135deg, #43e97b, #38f9d7); }
.level-4 .level-badge { background: linear-gradient(135deg, #fa709a, #fee140); }
.level-3 .level-badge { background: linear-gradient(135deg, #30cfd0, #330867); }
.level-2 .level-badge { background: linear-gradient(135deg, #30cfd0, #b4e391); }
.level-1 .level-badge { background: linear-gradient(135deg, #fefcea, #c72200); }

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

/* Card Content */
.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #1a1a1a;
}

.card-desc {
    font-size: 1rem;
    color: #666;
    margin-bottom: 20px;
    line-height: 1.5;
}

/* Card Footer */
.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid #f0f0f0;
}

.start-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: #667eea;
}

.arrow {
    font-size: 1.2rem;
    color: #667eea;
    transition: transform 0.3s ease;
}

.level-card:hover .arrow {
    transform: translateX(5px);
}

/* Footer */
.footer {
    text-align: center;
    padding: 30px 20px;
    color: white;
    font-size: 0.9rem;
    margin-top: 40px;
}

.footer p {
    margin: 5px 0;
    opacity: 0.9;
}

.footer-contact {
    font-size: 0.85rem;
    opacity: 0.8;
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header {
        padding: 30px 15px 20px;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: 0 5px;
    }
    
    .level-card {
        padding: 25px;
    }
    
    .card-title {
        font-size: 1.3rem;
    }
    
    .card-desc {
        font-size: 0.95rem;
    }
}

@media (max-width: 390px) {
    .title {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 0.95rem;
    }
    
    .level-card {
        padding: 20px;
    }
    
    .card-title {
        font-size: 1.2rem;
    }
    
    .card-icon {
        font-size: 1.8rem;
    }
}

/* iPhone SE and small devices */
@media (max-width: 375px) {
    .container {
        padding: 12px;
    }
    
    .card-grid {
        gap: 12px;
    }
}

/* Safe area for notch devices */
@supports (padding: max(0px)) {
    .container {
        padding-left: max(20px, env(safe-area-inset-left));
        padding-right: max(20px, env(safe-area-inset-right));
        padding-bottom: max(20px, env(safe-area-inset-bottom));
    }
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
    /* You can add dark mode styles here if needed */
}

/* Prevent text selection on cards */
.level-card {
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

/* Smooth scroll */
html {
    scroll-behavior: smooth;
}

/* Loading state animation */
.level-card {
    animation: cardFadeIn 0.5s ease forwards;
    animation-delay: calc(var(--card-index) * 0.1s);
}

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

.card-grid > .level-card:nth-child(1) { --card-index: 0; }
.card-grid > .level-card:nth-child(2) { --card-index: 1; }
.card-grid > .level-card:nth-child(3) { --card-index: 2; }
.card-grid > .level-card:nth-child(4) { --card-index: 3; }
.card-grid > .level-card:nth-child(5) { --card-index: 4; }
.card-grid > .level-card:nth-child(6) { --card-index: 5; }




.banner-container {
    text-align: center; text-decoration: none; 
}

.banner-container > a > p {
    padding-top: 10px !important;
    text-decoration: none; color:#ffffff; 
}



/* 교육서 2권 */

.banner-container{

    display: flex;
    justify-content: center; /* 가로 중앙 정렬 핵심 */
    align-items: center;
    width: 100%;            /* 전체 너비 확보 */
    margin: 50px 0;         /* 위아래 여백 */
    clear: both;            /* 주변 요소 간섭 방지 */
}




/* 외부 링크 섹션 스타일 */
.external-links {
    margin: 40px 0;
    padding: 0 20px;
    display: flex;
    justify-content: center;
}

.link-tabs {
    display: flex;
    gap: 12px;
    background: rgba(255, 255, 255, 0.1);
    padding: 10px;
    border-radius: 50px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.link-tab {
    text-decoration: none;
    color: #fff;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 30px;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

/* 개별 탭 호버 효과 */
.link-tab.blog:hover { background: #03cf5d; color: white; } /* 네이버 그린 */
.link-tab.linktree:hover { background: #43e660; color: #1e1e1e; }
.link-tab.class:hover { background: #3b82f6; color: white; }

/* 모바일 반응형 */
@media (max-width: 480px) {
    .link-tabs {
        flex-direction: column;
        width: 100%;
        border-radius: 15px;
        gap: 5px;
    }
    .link-tab {
        justify-content: center;
    }
}




/* 클래스 숨기기*/
/* 순차 오픈을 위한 설정 */

/* 1. 준비 중인 급수 숨기기 */
.coming-soon {
    display: none !important;
}

/* 2. 카드 그리드 정렬 보정 */
/* 카드가 3개(8,7,6급)일 때 화면 중앙에 예쁘게 배치되도록 합니다. */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 320px)); /* 카드 최대 너비 제한 */
    gap: 25px;
    justify-content: center; /* 중앙 정렬 */
    margin: 0 auto;
    max-width: 1200px;
}



/*개인정보방침*/

.footer > a {
    text-decoration: none;
    color: #ffffff;
}


/*쿠팡 파트너스*/
.coupang-box {
    display: flex !important;      /* 플렉스 박스로 선언 */
    justify-content: center !important; /* 가로 중앙 정렬 */
    width: 100% !important;        /* 부모 너비를 꽉 채워야 중앙 기준이 잡힘 */
    margin: 30px auto !important;  /* 위아래 여백을 주고 스스로 중앙 정렬 */
    text-align: center !important; /* 혹시 모를 상황 대비 */
}

.coupang-box iframe {
    display: inline-block !important; /* 아이프레임을 중앙에 오게 함 */
    margin: 0 auto !important;
}