/* Google Fonts: Noto Sans KR */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;700;900&display=swap');

/* --- Global Styles & Variables --- */
:root {
    --color-bg: #fffcf7; /* 따뜻한 미색 배경 */
    --color-text: #333;
    --color-primary: #3d8bfd;   /* AI-협업: 스마트 블루 */
    --color-secondary: #28a745; /* SEL: 힐링 그린 */
    --color-tertiary: #ffc107;  /* 월간: 크리에이티브 옐로우 */
    --color-accent: #ff6b6b;    /* 금쪽이 포인트 컬러 */
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    margin: 0;
    padding: 0;
    
    color: var(--color-text);
    line-height: 1.7;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

h1, h2, h3 {
    font-weight: 700;
    letter-spacing: -1px;
}

/* --- Header --- */
.header {
    text-align: center;
    padding: 40px 20px;
    /* border-bottom: 2px solid #eee; */
}
.header h1 {
    font-size: 4rem;
    margin: 0;
    font-weight: 900;
    color: var(--color-primary);
}
.header .logo {
    font-size: 2rem;
    color: var(--color-accent);
    font-weight: 700;
    display: block;
    margin-bottom: 10px;
}

/* --- Section 1: Impact (앞면) --- */
#impact {
    text-align: center;
    padding: 20px 20px;
}
#impact .main-catchphrase {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 900;
}
#impact .sub-catchphrase {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 60px;
}

.pillars {
    display: flex;
    justify-content: space-around;
    gap: 30px;
    flex-wrap: wrap;
}
.pillar {
    flex-basis: 30%;
    min-width: 260px;
}
.pillar h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}
.pillar blockquote {
    font-size: 1.1rem;
    border-left: 4px solid #ddd;
    padding-left: 20px;
    margin: 0;
    font-style: italic;
    color: #555;
}
.pillar .tag {
    display: inline-block;
    background-color: #e9ecef;
    color: #495057;
    font-size: 0.8rem;
    padding: 3px 8px;
    border-radius: 12px;
    margin-top: 15px;
    font-weight: 700;
}

/* --- Section 2: Details (뒷면) --- */
#details {
    padding: 80px 20px;
    /* background-color: #fff; */
}
#details .section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 10px;
}
#details .section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 60px;
}

.curriculum-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.curriculum-card {
    background-color:#fff;
    border: 1px solid #eee;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}
.curriculum-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}
.curriculum-card h3 {
    font-size: 1.5rem;
    margin-top: 0;
    padding-bottom: 15px;
    border-bottom: 2px solid;
    display: flex;
    align-items: center;
}
.curriculum-card .card-tagline {
    font-weight: 700;
    margin-top:10px;
    color: #555;
    min-height: 4.5em; /* 3줄 높이 확보 */
}
.curriculum-card ul {
    padding-left: 20px;
    padding-bottom: 10px;
    list-style: '✔ ';
    color: #444;
}
.curriculum-card ul li {
    margin-top:5px;
    margin-bottom: 10px;
}
.curriculum-card code {
    background-color: #f1f3f5;
    padding: 2px 4px;
    border-radius: 4px;
    font-size: 0.9em;
}
.curriculum-card .provided {
    font-size: 0.9rem;
    color: #666;
    margin-top: 20px;
    border-top: 1px dashed #ddd;
    padding-top: 15px;
}
/* [수정됨] '제공자료' 스타일 */
.provided-title {
    display: block;
    font-weight: 700;
    margin-bottom: 8px;
    color: #444;
}

/* 카드별 색상 */
#card-ai h3 { border-color: var(--color-primary); color: var(--color-primary); }
#card-sel h3 { border-color: var(--color-secondary); color: var(--color-secondary); }
#card-monthly h3 { border-color: var(--color-tertiary); color: var(--color-tertiary); }

/* --- Responsive Design --- */
@media (max-width: 992px) {
    .curriculum-grid {
        grid-template-columns: 1fr;
    }
    .pillars {
        flex-direction: column;
        align-items: center;
    }
}