*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --bg-primary: #0a0a0f; --bg-secondary: #0f0f18; --bg-card: #141420;
    --border-subtle: rgba(255,255,255,0.06); --border-medium: rgba(255,255,255,0.1);
    --text-primary: #f0f0f5; --text-secondary: #9898b0; --text-tertiary: #5e5e78;
    --accent-blue: #4f7df9; --accent-blue-hover: #6b93ff;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
    --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px;
    --max-width: 1120px;
}
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-main); background: var(--bg-primary); color: var(--text-primary); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 0 24px; background: rgba(10,10,15,0.8); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border-subtle); }
.nav-inner { max-width: var(--max-width); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.05rem; }
.nav-logo img { height: 32px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a:not(.nav-cta-btn) { font-size: 0.9rem; font-weight: 500; color: var(--text-secondary); transition: color 0.2s; }
.nav-links a:not(.nav-cta-btn):hover { color: var(--text-primary); }
.nav-links a.active { color: var(--text-primary); }
.nav-cta { position: relative; }
.nav-cta-btn { display: inline-flex; align-items: center; padding: 8px 20px; background: var(--accent-blue); color: #fff; font-size: 0.85rem; font-weight: 600; border-radius: var(--radius-sm); transition: background 0.2s; }
.nav-cta-btn:hover { background: var(--accent-blue-hover); }
.nav-mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.nav-mobile-toggle span { display: block; width: 22px; height: 2px; background: var(--text-secondary); border-radius: 2px; }
article { max-width: 720px; margin: 0 auto; padding: 140px 24px 60px; }
.article-header { margin-bottom: 40px; padding-bottom: 32px; border-bottom: 1px solid var(--border-subtle); }
.breadcrumb { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-tertiary); margin-bottom: 16px; }
.breadcrumb a { color: var(--accent-blue); }
.article-header h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.2; margin-bottom: 18px; }
.article-meta { font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-tertiary); }
.article-body { font-size: 1.05rem; line-height: 1.8; color: var(--text-secondary); }
.article-body p { margin-bottom: 22px; }
.article-body p strong { color: var(--text-primary); font-weight: 600; }
.article-body h2 { font-size: 1.55rem; font-weight: 700; color: var(--text-primary); letter-spacing: -0.02em; margin: 48px 0 18px; line-height: 1.3; }
.article-body h3 { font-size: 1.18rem; font-weight: 700; color: var(--text-primary); margin: 32px 0 14px; }
.article-body ul, .article-body ol { padding-left: 24px; margin-bottom: 22px; }
.article-body li { margin-bottom: 10px; line-height: 1.75; }
.article-body li strong { color: var(--text-primary); }
.article-body a { color: var(--accent-blue); border-bottom: 1px solid rgba(79,125,249,0.3); transition: border-color 0.2s; }
.article-body a:hover { border-bottom-color: var(--accent-blue); }
.article-cta { margin-top: 56px; padding: 32px; background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg); text-align: center; }
.article-cta h3 { color: var(--text-primary); font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
.article-cta p { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 20px; }
.article-cta-btn { display: inline-block; padding: 12px 28px; background: var(--accent-blue); color: #fff; font-size: 0.92rem; font-weight: 600; border-radius: var(--radius-sm); transition: background 0.2s; }
.article-cta-btn:hover { background: var(--accent-blue-hover); }
.footer { padding: 40px 24px; border-top: 1px solid var(--border-subtle); margin-top: 60px; }
.footer-inner { max-width: var(--max-width); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.footer-copy { font-size: 0.82rem; color: var(--text-tertiary); }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: 0.82rem; color: var(--text-tertiary); transition: color 0.2s; }
.footer-links a:hover { color: var(--text-secondary); }
@media (max-width: 768px) {
    .nav-links { display: none; position: fixed; top: 64px; left: 0; right: 0; background: rgba(10,10,15,0.97); backdrop-filter: blur(20px); flex-direction: column; padding: 24px; gap: 20px; border-bottom: 1px solid var(--border-subtle); }
    .nav-links.open { display: flex; }
    .nav-mobile-toggle { display: flex; }
    .nav-cta { width: 100%; }
    .nav-cta-btn { width: 100%; justify-content: center; }
    article { padding: 110px 20px 40px; }
    .footer-inner { flex-direction: column; text-align: center; }
}