/* 메인 전체 */
.main-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 80px;
}

/* 메인 소개 */
.main-intro {
    padding: 75px 40px;
    margin: 35px 0 65px;
    background: #edf3ff;
    border-radius: 12px;
}

.intro-label {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    color: #3478f6;
    margin-bottom: 18px;
}

.main-intro h1 {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.4;
    letter-spacing: -1.2px;
    color: #172b4d;
    margin-bottom: 18px;
}

.main-intro p {
    font-size: 16px;
    line-height: 1.9;
    color: #666;
}

/* 카테고리 섹션 */
.category-section {
    width: 100%;
}

.section-heading {
    margin-bottom: 25px;
}

.section-heading h2 {
    font-size: 25px;
    font-weight: 800;
    letter-spacing: -0.8px;
    margin-bottom: 5px;
}

.section-heading p {
    font-size: 14px;
    color: #888;
}

/* 카테고리 2열 */
.category-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 25px;
}

/* 카테고리 박스 */
.category-box {
    min-width: 0;
    padding: 28px 30px;
    background: #fff;
    border: 1px solid #e9edf2;
    border-radius: 10px;
    transition: border-color 0.2s;
}

.category-box:hover {
    border-color: #c4d5f5;
}

/* 카테고리 제목 */
.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    padding-bottom: 18px;
    margin-bottom: 12px;
    border-bottom: 1px solid #eee;
}

.category-header h3 {
    font-size: 20px;
    font-weight: 800;
    color: #222;
}

.category-header a {
    font-size: 13px;
    color: #999;
    white-space: nowrap;
}

.category-header a:hover {
    color: #3478f6;
}

/* 게시글 리스트 */
.post-list {
    list-style: none;
}

.post-list li {
    position: relative;
    padding: 10px 0 10px 12px;
    font-size: 15px;
    line-height: 1.5;
}

.post-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 20px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: #adb5bd;
}

.post-list li a {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: #444;
}

.post-list li a:hover {
    color: #3478f6;
}

/* 태블릿 */
@media (max-width: 900px) {
    .category-grid {
        gap: 18px;
    }

    .category-box {
        padding: 22px;
    }

    .main-intro {
        padding: 55px 30px;
    }

    .main-intro h1 {
        font-size: 29px;
    }
}

/* 모바일 */
@media (max-width: 650px) {
    .main-container {
        padding: 0 15px 50px;
    }

    .main-intro {
        padding: 40px 22px;
        margin: 20px 0 45px;
    }

    .main-intro h1 {
        font-size: 25px;
    }

    .main-intro p {
        font-size: 14px;
    }

    .section-heading h2 {
        font-size: 22px;
    }

    .category-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .category-box {
        padding: 22px 20px;
    }

    .category-header h3 {
        font-size: 19px;
    }

    .post-list li {
        font-size: 14px;
    }
}

/* 게시글이 없는 경우 */
.empty-content {
    width: 100%;
    padding: 80px 20px;
    background: #fff;
    border: 1px solid #e9edf2;
    border-radius: 10px;
    text-align: center;
}

.empty-content h3 {
    font-size: 20px;
    font-weight: 700;
    color: #333;
    margin-bottom: 10px;
}

.empty-content p {
    font-size: 14px;
    color: #999;
}