/* ========================================
   Blog Styles - BidRaon Landing
   Theme-aware via CSS variables
   ======================================== */

/* Blog Layout */
.blog-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.blog-narrow {
    max-width: 800px;
    margin: 0 auto;
}

/* Blog Header / Nav */
.blog-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--header-border);
}

.blog-nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.blog-nav-logo {
    font-family: 'Noto Sans KR', sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: -0.03em;
}

.blog-nav-logo span {
    color: #2563EB;
}

.blog-nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.blog-nav-links a {
    color: var(--text-sub);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

.blog-nav-links a:hover {
    color: var(--text-main);
}

/* Blog Listing Page */
.blog-hero {
    padding: 5rem 0 3rem;
    text-align: center;
}

.blog-hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 0.75rem;
    color: var(--text-main);
}

.blog-hero p {
    font-size: 1.125rem;
    color: var(--text-sub);
    max-width: 600px;
    margin: 0 auto;
}

/* Blog Cards Grid */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
    padding-bottom: 5rem;
}

.blog-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
}
.blog-card[hidden] { display: none; }

.blog-card:hover {
    border-color: var(--card-hover-border);
    background: var(--card-hover-bg);
    box-shadow: 0 20px 40px -10px var(--card-hover-shadow);
    transform: translateY(-4px);
}

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

.blog-card-body {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.blog-card-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #2563EB;
    margin-bottom: 0.75rem;
}

.blog-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-main);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.blog-card-desc {
    font-size: 0.9rem;
    color: var(--text-sub);
    line-height: 1.6;
    flex: 1;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-meta {
    font-size: 0.8rem;
    color: var(--g6);
}

/* Post Page */
.post-header {
    padding: 4rem 0 2rem;
    text-align: center;
}

.post-category {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #2563EB;
    margin-bottom: 1rem;
}

.post-title {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.03em;
    color: var(--text-main);
    margin-bottom: 1rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.post-meta {
    font-size: 0.875rem;
    color: var(--g6);
    margin-bottom: 2rem;
}

.post-cover {
    width: 100%;
    max-width: 800px;
    margin: 0 auto 3rem;
    border-radius: 12px;
    overflow: hidden;
}

.post-cover img {
    width: 100%;
    display: block;
}

/* Article Content Typography */
.post-content {
    max-width: 700px;
    margin: 0 auto;
    padding-bottom: 2rem;
    font-size: 1.0625rem;
    line-height: 1.85;
    color: var(--g4);
}

.post-content h2 {
    font-size: 1.625rem;
    font-weight: 700;
    color: var(--text-main);
    margin-top: 3rem;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--section-border);
}

.post-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-main);
    margin-top: 2.5rem;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.post-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--g2);
    margin-top: 2rem;
    margin-bottom: 0.5rem;
}

.post-content p {
    margin-bottom: 1.25rem;
}

.post-content a {
    color: #2563EB;
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color 0.2s;
}

.post-content a:hover {
    color: #3b82f6;
}

.post-content strong {
    color: var(--text-main);
    font-weight: 600;
}

.post-content em {
    font-style: italic;
    color: var(--g3);
}

.post-content ul,
.post-content ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.post-content ul {
    list-style-type: disc;
}

.post-content ol {
    list-style-type: decimal;
}

.post-content li {
    margin-bottom: 0.4rem;
    line-height: 1.7;
}

.post-content li ul,
.post-content li ol {
    margin-top: 0.4rem;
    margin-bottom: 0;
}

.post-content blockquote {
    border-left: 3px solid #2563EB;
    margin: 1.5rem 0;
    padding: 1rem 1.5rem;
    background: var(--cb);
    border-radius: 0 8px 8px 0;
    color: var(--text-sub);
    font-style: italic;
}

.post-content blockquote p:last-child {
    margin-bottom: 0;
}

.post-content code {
    background: var(--cb);
    color: var(--c);
    padding: 0.2em 0.45em;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: 'Fira Code', 'Consolas', monospace;
}

.post-content pre {
    background: var(--gf);
    border: 1px solid var(--g9);
    border-radius: 8px;
    padding: 1.25rem;
    overflow-x: auto;
    margin: 1.5rem 0;
}

.post-content pre code {
    background: none;
    padding: 0;
    color: var(--g4);
    font-size: 0.875rem;
    line-height: 1.7;
}

.post-content img {
    max-width: 100%;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.post-content hr {
    border: none;
    border-top: 1px solid var(--section-border);
    margin: 2.5rem 0;
}

/* Tables */
.post-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9375rem;
}

.post-content thead {
    background: var(--cb);
}

.post-content th {
    text-align: left;
    padding: 0.75rem 1rem;
    font-weight: 600;
    color: var(--text-main);
    border-bottom: 2px solid var(--g9);
    white-space: nowrap;
}

.post-content td {
    padding: 0.65rem 1rem;
    border-bottom: 1px solid var(--g9);
}

.post-content tbody tr:hover {
    background: var(--cb);
}

/* Pagination */
.blog-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: 0 0 4rem;
    margin-top: -2.5rem;
}
.blog-page-list {
    display: flex;
    align-items: center;
    gap: .25rem;
    list-style: none;
    padding: 0;
    margin: 0;
}
.blog-page-nav,
.blog-page-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 .65rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    color: var(--text-sub);
    font-size: .875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.blog-page-nav:hover:not([disabled]),
.blog-page-btn:hover:not([aria-current="page"]) {
    color: var(--text-main);
    border-color: var(--card-hover-border);
}
.blog-page-btn[aria-current="page"] {
    background: var(--c);
    color: #fff;
    border-color: var(--c);
}
.blog-page-nav[disabled] {
    opacity: .35;
    cursor: not-allowed;
}
.blog-page-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    color: var(--text-sub);
    user-select: none;
}

/* Post Back FAB (floating back-to-list) */
.post-back-fab {
    position: fixed;
    left: max(2rem, calc((100vw - 1200px) / 2 + 1rem));
    top: 7rem;
    z-index: 40;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, .08);
}

.post-back-fab:hover {
    background: var(--card-hover-bg);
    border-color: var(--card-hover-border);
}

@media (prefers-reduced-motion: no-preference) {
    .post-back-fab {
        transition: background .2s ease, border-color .2s ease, transform .2s cubic-bezier(.2, 0, 0, 1);
    }
    .post-back-fab:hover {
        transform: translateX(-2px);
    }
}

@media (max-width: 1024px) {
    .post-back-fab {
        left: 1rem;
        top: auto;
        bottom: 1.25rem;
    }
}

/* Footer */
.blog-footer {
    border-top: 1px solid var(--section-border);
    padding: 2rem 0;
    text-align: center;
    color: var(--g6);
    font-size: 0.8rem;
}

/* Empty state */
.blog-empty {
    text-align: center;
    padding: 6rem 2rem;
    color: var(--g6);
}

.blog-empty p {
    font-size: 1.125rem;
}

/* Responsive */
@media (max-width: 768px) {
    .blog-hero h1 {
        font-size: 1.75rem;
    }

    .blog-hero p {
        font-size: 1rem;
    }

    .blog-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .post-title {
        font-size: 1.625rem;
    }

    .post-content {
        font-size: 1rem;
    }

    .post-content h2 {
        font-size: 1.375rem;
    }

    .post-content h3 {
        font-size: 1.125rem;
    }

    .blog-nav-links {
        gap: 1rem;
    }

    .post-content table {
        font-size: 0.8125rem;
    }

    .post-content th,
    .post-content td {
        padding: 0.5rem 0.65rem;
    }
}

@media (max-width: 480px) {
    .blog-container {
        padding: 0 1rem;
    }

    .blog-nav-inner {
        padding: 0.875rem 1rem;
    }

    .blog-card-body {
        padding: 1.25rem;
    }
}