/* ========================================
   블로그 스타일
   ======================================== */

/* === 목록 페이지 === */
.blog-hero {
    padding: calc(var(--navbar-height) + var(--spacing-3xl)) 0 var(--spacing-2xl);
    text-align: center;
    background: var(--gradient-main);
    color: #fff;
}

.blog-hero h1 {
    font-size: var(--font-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.blog-hero p {
    font-size: var(--font-xl);
    opacity: .95;
    max-width: 600px;
    margin: 0 auto;
}

.blog-list-section {
    padding: var(--spacing-3xl) var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

/* 카테고리 필터 */
.blog-filters {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-2xl);
    justify-content: center;
}

.blog-filter-btn {
    padding: var(--spacing-xs) var(--spacing-lg);
    border: 1.5px solid var(--border-color);
    border-radius: 50px;
    background: transparent;
    color: var(--text-primary);
    font-size: .9rem;
    cursor: pointer;
    transition: all .2s;
}

.blog-filter-btn:hover,
.blog-filter-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

/* 글 그리드 */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.blog-card {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: transform .25s, box-shadow .25s;
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.blog-card-thumb {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    background: var(--bg-secondary);
}

.blog-card-thumb-placeholder {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, var(--primary-color) 0%, #ff6600 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 2rem;
}

.blog-card-body {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.blog-card-category {
    display: inline-block;
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.blog-card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-desc {
    font-size: .9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.blog-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: .82rem;
    color: var(--text-secondary);
}

.blog-card-date {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.blog-card-link {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
}

.blog-card-link:hover {
    text-decoration: underline;
}

/* 빈 상태 */
.blog-empty {
    text-align: center;
    padding: var(--spacing-3xl) 0;
    color: var(--text-secondary);
}

.blog-empty i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: .4;
}

.blog-empty p {
    font-size: 1.1rem;
}

/* 로딩 */
.blog-loading {
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.blog-loading .loading-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin .8s linear infinite;
    margin: 0 auto var(--spacing-md);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* === 글 상세 페이지 === */
.blog-post-header {
    padding: calc(var(--navbar-height) + var(--spacing-3xl)) 0 var(--spacing-2xl);
    background: var(--gradient-main);
    color: #fff;
}

.blog-post-header .container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.blog-back-link {
    display: inline-block;
    color: rgba(255,255,255,.8);
    text-decoration: none;
    font-size: .9rem;
    margin-bottom: var(--spacing-lg);
    transition: color .2s;
}

.blog-back-link:hover {
    color: #fff;
}

.blog-category {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(255,255,255,.2);
    border-radius: 50px;
    font-size: .8rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.blog-post-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

.blog-post-meta {
    font-size: .9rem;
    opacity: .8;
}

.blog-post-meta time {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* 본문 */
.blog-post-body {
    padding: var(--spacing-3xl) 0;
}

.blog-post-body .container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.blog-post-body h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin: var(--spacing-2xl) 0 var(--spacing-md);
    color: var(--text-primary);
    border-left: 4px solid var(--primary-color);
    padding-left: var(--spacing-md);
}

.blog-post-body h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin: var(--spacing-xl) 0 var(--spacing-sm);
    color: var(--text-primary);
}

.blog-post-body p {
    font-size: 1.05rem;
    line-height: 1.85;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.blog-post-body ul,
.blog-post-body ol {
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-xl);
}

.blog-post-body li {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.blog-post-body blockquote {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-left: 4px solid var(--primary-color);
    background: var(--bg-secondary);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.blog-post-body blockquote p {
    margin-bottom: 0;
    font-style: italic;
}

.blog-post-body code {
    background: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: .92em;
}

.blog-post-body pre {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin-bottom: var(--spacing-lg);
}

.blog-post-body pre code {
    background: none;
    padding: 0;
}

/* 이미지 figure */
.blog-figure {
    margin: var(--spacing-xl) 0;
    text-align: center;
}

.blog-figure img {
    max-width: 100%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.blog-figure figcaption {
    margin-top: var(--spacing-sm);
    font-size: .85rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* 하단 네비 */
.blog-post-footer {
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border-color);
}

.blog-post-footer .container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.blog-back-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-xl);
    background: var(--primary-color);
    color: #fff;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: background .2s;
}

.blog-back-btn:hover {
    background: #e67a00;
}

/* 테이블 */
.blog-post-body table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: var(--spacing-xl) 0;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    font-size: .95rem;
}

.blog-post-body thead {
    background: var(--gradient-main);
    color: #fff;
}

.blog-post-body thead th {
    padding: var(--spacing-md) var(--spacing-lg);
    font-weight: 700;
    text-align: left;
    white-space: nowrap;
}

.blog-post-body tbody tr {
    background: var(--bg-white);
    transition: background .15s;
}

.blog-post-body tbody tr:nth-child(even) {
    background: var(--bg-secondary);
}

.blog-post-body tbody tr:hover {
    background: rgba(255, 136, 0, .07);
}

.blog-post-body tbody td {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    line-height: 1.7;
}

.blog-post-body tbody td:first-child {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.blog-post-body tbody td strong {
    color: var(--primary-color);
}

@media (max-width: 768px) {
    .blog-post-body table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .blog-post-body thead th,
    .blog-post-body tbody td {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: .85rem;
    }
}

/* 파이프라인 플로우차트 */
.pipeline-flow {
    margin: var(--spacing-xl) 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    align-items: center;
}

.pipeline-step {
    background: var(--bg-white);
    border: 1.5px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    width: 100%;
    max-width: 600px;
    transition: border-color .2s, box-shadow .2s;
}

.pipeline-step:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.pipeline-step-title {
    font-weight: 700;
    color: var(--primary-color);
    font-size: .95rem;
    margin-bottom: 4px;
}

.pipeline-step-desc {
    font-size: .88rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.pipeline-step-sub {
    padding-left: var(--spacing-lg);
    margin-top: 4px;
}

.pipeline-step-sub p {
    font-size: .84rem;
    color: var(--text-secondary);
    margin: 2px 0;
    line-height: 1.5;
}

.pipeline-arrow {
    font-size: 1.3rem;
    color: var(--primary-color);
    line-height: 1;
    padding: 4px 0;
}

/* 네트워크 다이어그램 */
.network-diagram {
    margin: var(--spacing-xl) 0;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl) var(--spacing-xl);
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    box-shadow: var(--shadow-sm);
}

.network-cameras {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 8px;
    flex-shrink: 0;
}

.network-cam {
    display: flex;
    align-items: center;
}

.network-cam-icon {
    width: 72px;
    height: 34px;
    background: var(--gradient-main);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: .7rem;
    font-weight: 700;
    flex-shrink: 0;
    letter-spacing: .5px;
}

.network-lines {
    width: 100px;
    flex-shrink: 0;
    align-self: stretch;
}

.network-lines line {
    stroke: var(--primary-color);
    stroke-width: 1.5;
    opacity: .4;
}

.network-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0;
    flex-shrink: 0;
}

.network-switch, .network-pc {
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    font-weight: 700;
    font-size: .95rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    white-space: nowrap;
}

.network-switch {
    background: var(--gradient-main);
    color: #fff;
}

.network-pc {
    background: var(--bg-white);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.network-link {
    width: 2px;
    height: 40px;
    background: var(--primary-color);
    opacity: .4;
}

@media (max-width: 768px) {
    .network-diagram {
        flex-direction: column;
        padding: var(--spacing-xl) var(--spacing-lg);
        gap: var(--spacing-md);
        align-items: center;
    }

    .network-cameras {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 6px;
    }

    .network-lines { display: none; }

    .network-cam-icon {
        width: 52px;
        height: 30px;
        font-size: .6rem;
    }

    .pipeline-step {
        max-width: 100%;
    }
}

/* === 반응형 === */
@media (max-width: 768px) {
    .blog-hero h1 { font-size: var(--font-3xl); }
    .blog-hero p { font-size: var(--font-base); }
    .blog-grid { grid-template-columns: 1fr; }
    .blog-post-title { font-size: 1.5rem; }
    .blog-post-body h2 { font-size: 1.3rem; }
    .blog-post-body p, .blog-post-body li { font-size: 1rem; }
}