/* ── DOXOM Blog ────────────────────────────────────────────────────── */
:root {
    --doc-header-h: 56px;
    --dxm-black:      #1a1a2e;
    --dxm-dark:       #16213e;
    --dxm-blue:       #4a5fc1;
    --dxm-violet:     #7b2d8e;
    --dxm-gradient:   linear-gradient(135deg, #4a5fc1 0%, #7b2d8e 100%);
    --dxm-light:      #f5f5f5;
    --dxm-white:      #ffffff;
    --dxm-gray:       #8892a4;
    --dxm-gray-light: #e8eaf0;
    --dxm-text:       #2c3e50;
    --dxm-radius:     8px;
    --dxm-font:       'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --dxm-font-mono:  'JetBrains Mono', 'Fira Code', monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--dxm-font);
    color: var(--dxm-text);
    background: var(--dxm-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--dxm-blue); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--dxm-violet); }

/* ── Header ────────────────────────────────────────────────────────── */
.blog-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    height: var(--doc-header-h);
    background: var(--dxm-black);
    display: flex; align-items: center; padding: 0 24px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.blog-header .brand {
    font-size: 1.15rem; font-weight: 800; color: #fff; margin-right: 8px;
}
.blog-header .brand .x { color: var(--dxm-blue); }
.blog-header .separator { color: rgba(255,255,255,0.3); margin: 0 12px; }
.blog-header .blog-title { color: rgba(255,255,255,0.85); font-size: 0.95rem; font-weight: 500; }
.blog-header .home-link {
    margin-left: auto; color: rgba(255,255,255,0.6); font-size: 0.88rem;
}
.blog-header .home-link:hover { color: #fff; }
.blog-header .nav-links { margin-left: auto; display: flex; gap: 20px; align-items: center; }
.blog-header .nav-links a {
    color: rgba(255,255,255,0.6); font-size: 0.88rem; font-weight: 500;
}
.blog-header .nav-links a:hover { color: #fff; }

/* ── Main content ──────────────────────────────────────────────────── */
.blog-main {
    max-width: 860px;
    margin: 0 auto;
    padding: calc(var(--doc-header-h) + 40px) 24px 60px;
}

/* ── Blog index — article cards ────────────────────────────────────── */
.blog-hero {
    text-align: center;
    margin-bottom: 48px;
}
.blog-hero h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dxm-black);
    margin-bottom: 12px;
}
.blog-hero .gradient-text {
    background: var(--dxm-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.blog-hero p {
    color: var(--dxm-gray);
    font-size: 1.05rem;
    max-width: 560px;
    margin: 0 auto;
}

.blog-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.blog-card {
    background: #fff;
    border: 1px solid var(--dxm-gray-light);
    border-radius: var(--dxm-radius);
    padding: 28px 32px;
    transition: box-shadow 0.2s, transform 0.2s;
    display: block;
    color: inherit;
}
.blog-card:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transform: translateY(-2px);
    color: inherit;
}
.blog-card .card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
    font-size: 0.82rem;
    color: var(--dxm-gray);
}
.blog-card .card-tag {
    background: rgba(74,95,193,0.1);
    color: var(--dxm-blue);
    padding: 2px 10px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.blog-card .card-tag.ladder { background: rgba(74,95,193,0.1); color: var(--dxm-blue); }
.blog-card .card-tag.modbus { background: rgba(0,128,128,0.1); color: #008080; }
.blog-card .card-tag.hmi    { background: rgba(123,45,142,0.1); color: var(--dxm-violet); }
.blog-card .card-tag.general { background: rgba(40,167,69,0.08); color: #28a745; }
.blog-card .card-tag.studio { background: rgba(255,152,0,0.1); color: #e68a00; }
.blog-card h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dxm-black);
    margin-bottom: 8px;
    line-height: 1.4;
}
.blog-card p {
    color: var(--dxm-gray);
    font-size: 0.92rem;
    line-height: 1.6;
}
.blog-card .read-more {
    display: inline-block;
    margin-top: 12px;
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--dxm-blue);
}
.blog-card:hover .read-more { color: var(--dxm-violet); }

/* ── Article page ──────────────────────────────────────────────────── */
.article-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--dxm-gray-light);
}
.article-header .article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 0.85rem;
    color: var(--dxm-gray);
}
.article-header h1 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--dxm-black);
    line-height: 1.3;
    margin-bottom: 8px;
}
.article-header .article-desc {
    color: var(--dxm-gray);
    font-size: 1.05rem;
}

/* ── Article body ──────────────────────────────────────────────────── */
.blog-main h2 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--dxm-black);
    margin-top: 40px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--dxm-gray-light);
}
.blog-main h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dxm-text);
    margin-top: 28px;
    margin-bottom: 12px;
}
.blog-main p {
    margin-bottom: 16px;
}
.blog-main ul, .blog-main ol {
    margin-bottom: 16px;
    padding-left: 24px;
}
.blog-main li {
    margin-bottom: 6px;
}
.blog-main img {
    max-width: 100%;
    border-radius: var(--dxm-radius);
    margin: 20px 0;
    border: 1px solid var(--dxm-gray-light);
}
.blog-main pre {
    background: #1e1e2e;
    color: #cdd6f4;
    border-radius: var(--dxm-radius);
    padding: 20px 24px;
    margin: 20px 0;
    overflow-x: auto;
    font-family: var(--dxm-font-mono);
    font-size: 0.88rem;
    line-height: 1.6;
}
.blog-main code {
    font-family: var(--dxm-font-mono);
    font-size: 0.88em;
    background: rgba(74,95,193,0.08);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--dxm-blue);
}
.blog-main pre code {
    background: none;
    padding: 0;
    color: inherit;
    font-size: inherit;
}
.blog-main blockquote {
    border-left: 4px solid var(--dxm-blue);
    margin: 20px 0;
    padding: 16px 20px;
    background: rgba(74,95,193,0.04);
    border-radius: 0 var(--dxm-radius) var(--dxm-radius) 0;
    font-style: italic;
    color: var(--dxm-gray);
}
.blog-main table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 0.9rem;
}
.blog-main table th {
    background: var(--dxm-light);
    font-weight: 600;
    text-align: left;
    padding: 10px 14px;
    border-bottom: 2px solid var(--dxm-gray-light);
}
.blog-main table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--dxm-gray-light);
}

/* ── Tip/Note boxes ────────────────────────────────────────────────── */
.blog-tip {
    background: rgba(40,167,69,0.06);
    border-left: 4px solid #28a745;
    border-radius: 0 var(--dxm-radius) var(--dxm-radius) 0;
    padding: 16px 20px;
    margin: 20px 0;
}
.blog-tip strong { color: #28a745; }
.blog-warning {
    background: rgba(255,152,0,0.06);
    border-left: 4px solid #ff9800;
    border-radius: 0 var(--dxm-radius) var(--dxm-radius) 0;
    padding: 16px 20px;
    margin: 20px 0;
}
.blog-warning strong { color: #e68a00; }

/* ── Navigation footer ─────────────────────────────────────────────── */
.blog-nav-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--dxm-gray-light);
    font-size: 0.9rem;
}
.blog-nav-footer a {
    display: flex;
    flex-direction: column;
    gap: 2px;
    color: var(--dxm-text);
    font-weight: 500;
}
.blog-nav-footer a:hover { color: var(--dxm-blue); }
.blog-nav-footer a .label {
    font-size: 0.78rem;
    color: var(--dxm-gray);
    font-weight: 400;
}

/* ── Responsive ────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .blog-main { padding-left: 16px; padding-right: 16px; }
    .blog-hero h1 { font-size: 1.5rem; }
    .blog-card { padding: 20px 24px; }
    .article-header h1 { font-size: 1.4rem; }
    .blog-header .nav-links { gap: 12px; }
    .blog-header .nav-links a { font-size: 0.8rem; }
}