:root {
    --color-bg: #0a0a0a;
    --color-text: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-accent: #3b82f6;
    --color-border: #1f1f1f;
    --font-display: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Urbanist', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { overflow-x: clip; width: 100%; }
html { scrollbar-width: thin; scrollbar-color: #2a2a2a #0a0a0a; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #0a0a0a; }
::-webkit-scrollbar-thumb { background: #2a2a2a; border-radius: 8px; border: 2px solid #0a0a0a; }
::-webkit-scrollbar-thumb:hover { background: #3a3a3a; }

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.blog-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.1rem 2rem;
    background: rgba(10, 10, 10, 0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.blog-nav .logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
    color: #fff;
}

.blog-nav .logo img { height: 28px; width: auto; }
.blog-nav .nav-right { display: flex; align-items: center; gap: 1.5rem; }
.blog-nav .nav-right a { color: var(--color-text-secondary); font-weight: 500; font-size: 0.9rem; }
.blog-nav .nav-right a:hover { color: #fff; text-decoration: none; }

.blog-cta {
    padding: 0.55rem 1.2rem;
    background: var(--color-accent);
    color: #fff !important;
    border-radius: 50px;
    font-weight: 600;
    white-space: nowrap;
}
.blog-cta:hover { text-decoration: none !important; opacity: 0.92; }

/* Layout */
.article {
    max-width: 760px;
    margin: 0 auto;
    padding: 3.5rem 1.5rem 5rem;
}

.breadcrumb { font-size: 0.85rem; color: var(--color-text-secondary); margin-bottom: 1.5rem; }
.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb a:hover { color: var(--color-accent); }

.eyebrow {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.article h1 {
    font-family: var(--font-display);
    font-size: 2.6rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.01em;
    margin-bottom: 1rem;
}

.article .meta { color: var(--color-text-secondary); font-size: 0.9rem; margin-bottom: 2.5rem; }

.article h2 {
    font-family: var(--font-display);
    font-size: 1.7rem;
    font-weight: 700;
    margin: 2.8rem 0 1rem;
    letter-spacing: -0.01em;
}

.article h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    margin: 2rem 0 0.8rem;
}

.article p { margin-bottom: 1.3rem; color: #d8d8d8; font-weight: 300; font-size: 1.05rem; }
.article ul, .article ol { margin: 0 0 1.4rem 1.3rem; color: #d8d8d8; font-weight: 300; }
.article li { margin-bottom: 0.6rem; }
.article strong { color: #fff; font-weight: 600; }

.article pre {
    background: #111;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 1.2rem 1.3rem;
    overflow-x: auto;
    margin-bottom: 1.6rem;
    font-size: 0.88rem;
    line-height: 1.6;
}
.article code {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.9em;
    background: rgba(255, 255, 255, 0.06);
    padding: 0.1rem 0.4rem;
    border-radius: 5px;
}
.article pre code { background: none; padding: 0; font-size: 1em; }

.callout {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.06) 100%);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 14px;
    padding: 1.4rem 1.6rem;
    margin: 2rem 0;
}
.callout p { margin-bottom: 0.5rem; }
.callout p:last-child { margin-bottom: 0; }

.related {
    margin-top: 3.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}
.related h3 { font-family: var(--font-display); font-size: 1.1rem; margin-bottom: 1rem; }
.related-card {
    display: block;
    padding: 1.2rem 1.4rem;
    border: 1px solid var(--color-border);
    border-radius: 14px;
    margin-bottom: 1rem;
    transition: border-color 0.3s ease, background 0.3s ease;
}
.related-card:hover { border-color: rgba(59, 130, 246, 0.4); background: rgba(255, 255, 255, 0.02); text-decoration: none; }
.related-card .rc-title { color: #fff; font-weight: 600; font-family: var(--font-display); margin-bottom: 0.3rem; }
.related-card .rc-desc { color: var(--color-text-secondary); font-size: 0.92rem; }

.article-cta {
    margin-top: 3.5rem;
    padding: 2rem;
    text-align: center;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: 16px;
}
.article-cta h3 { font-family: var(--font-display); font-size: 1.4rem; margin-bottom: 0.8rem; }
.article-cta p { color: var(--color-text-secondary); margin-bottom: 1.5rem; }
.article-cta .btn-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.8rem;
}
.btn {
    display: inline-block;
    padding: 0.9rem 1.8rem;
    background: var(--color-accent);
    color: #fff !important;
    border-radius: 50px;
    font-weight: 600;
}
.btn:hover { text-decoration: none !important; opacity: 0.92; }
.btn.secondary { background: transparent; border: 1px solid rgba(255, 255, 255, 0.25); }

/* Blog index */
.blog-list { max-width: 860px; margin: 0 auto; padding: 3.5rem 1.5rem 5rem; }
.blog-list h1 { font-family: var(--font-display); font-size: 2.6rem; font-weight: 800; margin-bottom: 0.6rem; letter-spacing: -0.01em; }
.blog-list .intro { color: var(--color-text-secondary); font-size: 1.1rem; margin-bottom: 3rem; max-width: 620px; }
.blog-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-bottom: 2rem;
}
.blog-filter-btn {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    padding: 0.55rem 1.3rem;
    cursor: pointer;
    transition: all 0.25s ease;
}
.blog-filter-btn:hover { color: var(--color-text); border-color: rgba(59, 130, 246, 0.4); }
.blog-filter-btn.active {
    color: #fff;
    background: var(--color-accent);
    border-color: var(--color-accent);
}
.post-card.hidden { display: none; }

.post-card {
    display: block;
    padding: 1.8rem;
    border: 1px solid var(--color-border);
    border-radius: 18px;
    margin-bottom: 1.4rem;
    transition: border-color 0.3s ease, transform 0.3s ease, background 0.3s ease;
}
.post-card:hover { border-color: rgba(59, 130, 246, 0.4); background: rgba(255, 255, 255, 0.02); transform: translateY(-3px); text-decoration: none; }
.post-card .pc-eyebrow { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-accent); }
.post-card h2 { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; margin: 0.5rem 0 0.6rem; color: #fff; letter-spacing: -0.01em; }
.post-card p { color: var(--color-text-secondary); font-weight: 300; margin-bottom: 0.6rem; }
.post-card .pc-meta { font-size: 0.85rem; color: #666; }

/* Footer */
.blog-footer {
    border-top: 1px solid var(--color-border);
    padding: 2.5rem 2rem;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
}
.blog-footer a { color: var(--color-text-secondary); }

@media (max-width: 768px) {
    .blog-nav { padding: 0.9rem 1.1rem; }
    .blog-nav .logo { font-size: 1rem; }
    .blog-nav .logo img { height: 24px; }
    .blog-nav .nav-right { gap: 0.9rem; }
    .blog-nav .nav-right .hide-sm { display: none; }
    .blog-cta { padding: 0.5rem 1.05rem; font-size: 0.85rem; }
    .article h1 { font-size: 2rem; }
    .blog-list h1 { font-size: 2rem; }
    .article h2 { font-size: 1.4rem; }
    .article-cta { padding: 1.6rem 1.2rem; }
    .article-cta .btn-row { flex-direction: column; }
    .article-cta .btn { width: 100%; text-align: center; }
}