:root{--color-navy: #0f172a;--color-slate: #1e293b;--color-slate-light: #334155;--color-gray-dark: #475569;--color-gray-muted: #64748b;--color-gray-border: #e2e8f0;--color-gray-bg: #f8fafc;--color-white: #ffffff;--color-accent: #2563eb;--color-accent-hover: #1d4ed8;--color-accent-light: #eff6ff;--color-cyan: #0284c7;--font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;--max-width: 1200px;--content-width: 760px;--border-radius: 8px;--shadow-sm: 0 1px 3px rgba(15, 23, 42, .08);--shadow-md: 0 4px 12px rgba(15, 23, 42, 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var(--color-gray-border);position:sticky;top:0;z-index:1000}.header-inner{display:flex;align-items:center;justify-content:space-between;height:4.5rem;position:relative}.site-logo{display:flex;align-items:center;gap:.5rem;font-weight:700;font-size:1.5rem;color:var(--color-navy);text-decoration:none}.site-logo svg{height:2.25rem;width:auto}.desktop-nav{display:block}.nav-links{display:flex;align-items:center;gap:1.25rem;list-style:none}.nav-links a{color:var(--color-slate);font-weight:500;font-size:.95rem}.nav-links a:hover,.nav-links a.active{color:var(--color-accent);text-decoration:none}.header-actions{display:flex;align-items:center;gap:.75rem}.search-btn{display:inline-flex;align-items:center;gap:.5rem;background-color:var(--color-gray-bg);border:1px solid var(--color-gray-border);border-radius:20px;padding:.4rem .85rem;font-size:.875rem;color:var(--color-gray-muted);cursor:pointer;transition:all 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a:hover{background-color:var(--color-gray-bg);color:var(--color-accent);text-decoration:none}.site-footer{background-color:var(--color-navy);color:#94a3b8;padding:4rem 0 2rem;margin-top:auto}.footer-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:2.5rem;padding-bottom:3rem;border-bottom:1px solid #1e293b}.footer-brand h2{color:var(--color-white);font-size:1.5rem;margin-bottom:.75rem}.footer-brand p{font-size:.9rem;line-height:1.6}.footer-col h3{color:var(--color-white);font-size:1rem;font-weight:600;margin-bottom:1rem}.footer-col ul{list-style:none}.footer-col li{margin-bottom:.5rem}.footer-col a{color:#94a3b8;font-size:.875rem}.footer-col a:hover{color:var(--color-white)}.footer-bottom{padding-top:2rem;display:flex;justify-content:space-between;align-items:center;font-size:.85rem}.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;font-size:.875rem;color:var(--color-gray-muted);margin-bottom:1.5rem}.breadcrumbs 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a:hover{color:var(--color-accent);text-decoration:none}.card-desc{font-size:.9rem;color:var(--color-gray-dark);margin-bottom:1.25rem;flex-grow:1}.card-meta{font-size:.8rem;color:var(--color-gray-muted);display:flex;gap:.75rem;align-items:center;border-top:1px solid var(--color-gray-bg);padding-top:.75rem}.callout{padding:1.25rem;border-radius:var(--border-radius);margin:1.5rem 0;border-left:4px solid var(--color-accent);background-color:var(--color-accent-light)}.callout.tip{border-left-color:#10b981;background-color:#ecfdf5}.callout.warning{border-left-color:#f59e0b;background-color:#fffbeb}.callout.important{border-left-color:#ef4444;background-color:#fef2f2}.callout-title{font-weight:700;font-size:.95rem;margin-bottom:.35rem;color:var(--color-navy)}.quick-fix-box{background:var(--color-accent-light);border:1px solid #bfdbfe;border-radius:var(--border-radius);padding:1.25rem 1.5rem;margin:1.5rem 0 2rem}.quick-fix-box 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a:hover{color:var(--color-accent-hover)}.article-body img{max-width:100%;height:auto;border-radius:var(--border-radius);margin:1.5rem 0}@media(max-width:768px){.header-inner{height:3.75rem}.desktop-nav{display:none}.mobile-menu{display:block}.footer-grid{grid-template-columns:1fr;gap:2rem}.footer-bottom{flex-direction:column;gap:1rem;text-align:center}}