:root{--bg-primary:#ffffff;--bg-secondary:#f8fafc;--bg-tertiary:#f1f5f9;--text-primary:#0f172a;--text-secondary:#334155;--text-muted:#475569;--border-color:#cbd5e1;--border-focus:#2563eb;--accent-primary:#1d4ed8;--accent-hover:#1e40af;--accent-light:#eff6ff;--error-color:#b91c1c;--error-bg:#fef2f2;--warning-color:#b45309;--warning-bg:#fffbeb;--success-color:#15803d;--success-bg:#f0fdf4;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--shadow-sm:0 1px 2px 0 rgb(0 0 0/0.05);--shadow-md:0 4px 6px -1px rgb(0 0 0/0.1),0 2px 4px -2px rgb(0 0 0/0.1);--font-sans:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Pretendard","Malgun Gothic",sans-serif;--font-serif:"Batang","AppleMyungjo","Noto Serif KR",Georgia,serif;--font-mono:"D2Coding","Consolas","Courier 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var(--border-color);position:-webkit-sticky;position:sticky;top:0;z-index:100}.header-inner{justify-content:space-between;height:64px}.header-inner,.site-logo{display:flex;align-items:center}.site-logo{font-size:1.15rem;font-weight:800;color:var(--text-primary);text-decoration:none;gap:8px}.site-logo-badge{background:var(--accent-light);color:var(--accent-primary);font-size:.75rem;font-weight:700;padding:2px 8px;border-radius:var(--radius-sm);border:1px solid #bfdbfe}.main-nav{display:flex;align-items:center;gap:8px}.nav-link{color:var(--text-secondary);text-decoration:none;font-size:.925rem;font-weight:600;padding:8px 12px;border-radius:var(--radius-sm);transition:background .15s,color .15s}.nav-link:hover{background:var(--bg-tertiary);color:var(--text-primary)}.nav-link.active{color:var(--accent-primary);background:var(--accent-light)}.mobile-nav-toggle{display:none;background:none;border:1px solid var(--border-color);padding:8px 12px;border-radius:var(--radius-sm);font-size:.9rem;font-weight:600;cursor:pointer}.breadcrumbs{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--text-muted);margin-bottom:20px;list-style:none}.breadcrumbs a{color:var(--text-secondary);text-decoration:none}.breadcrumbs a:hover{text-decoration:underline}.main-content{flex:1 1;padding:32px 0 64px}.page-hero{margin-bottom:36px}.page-title{font-size:2rem;font-weight:800;letter-spacing:-.03em;color:var(--text-primary);margin-bottom:12px;line-height:1.3}.page-description{font-size:1.1rem;color:var(--text-secondary);line-height:1.65;max-width:840px}.badge{display:inline-block;font-size:.8rem;font-weight:700;padding:3px 10px;border-radius:9999px;margin-bottom:12px}.badge-blue{background:var(--accent-light);color:var(--accent-primary);border:1px solid #bfdbfe}.badge-amber{background:var(--warning-bg);color:var(--warning-color);border:1px solid #fde68a}.card{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:24px;box-shadow:var(--shadow-sm);margin-bottom:24px}.card-header{border-bottom:1px solid var(--border-color);padding-bottom:16px;margin-bottom:16px}.card-title{font-size:1.25rem;font-weight:700;color:var(--text-primary)}.isolated-sandbox{border:2px dashed #f59e0b;background-color:#fffbeb;border-radius:var(--radius-md);padding:20px;margin:20px 0;position:relative}.isolated-sandbox-header{display:flex;align-items:center;gap:8px;font-size:.85rem;font-weight:700;color:#92400e;margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid #fde68a}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:var(--radius-sm);font-size:.95rem;font-weight:600;cursor:pointer;text-decoration:none;border:1px solid transparent;transition:all .15s ease;min-height:44px}.btn-primary{background:var(--accent-primary);color:#ffffff}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border-color:var(--border-color)}.btn-secondary:hover{background:#e2e8f0}.btn-sm{padding:6px 12px;font-size:.85rem;min-height:36px}.form-group{margin-bottom:16px}.form-label{display:block;font-size:.9rem;font-weight:600;color:var(--text-primary);margin-bottom:6px}.form-input,.form-select,.form-textarea{width:100%;padding:10px 14px;border:1px solid var(--border-color);border-radius:var(--radius-sm);font-family:inherit;font-size:.95rem;background:var(--bg-primary);color:var(--text-primary)}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--border-focus)}.code-block{background:#0f172a;color:#f8fafc;padding:16px;border-radius:var(--radius-md);font-family:var(--font-mono);font-size:.9rem;overflow-x:auto;position:relative;line-height:1.5;margin:16px 0}.article-section a,.article-section code{overflow-wrap:anywhere}.code-copy-btn{position:absolute;top:10px;right:10px;background:#334155;color:#ffffff;border:none;padding:4px 10px;border-radius:var(--radius-sm);font-size:.75rem;cursor:pointer}.code-copy-btn:hover{background:#475569}.faq-list{display:flex;flex-direction:column;gap:12px;margin:24px 0}.faq-item{border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-primary);overflow:hidden}.faq-question{width:100%;text-align:left;padding:16px 20px;background:none;border:none;font-size:1rem;font-weight:700;color:var(--text-primary);display:flex;justify-content:space-between;align-items:center;cursor:pointer}.faq-answer{padding:0 20px 16px;color:var(--text-secondary);line-height:1.65;font-size:.95rem}.article-section{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:32px;margin-top:36px}.article-section h2{font-size:1.5rem;font-weight:800;color:var(--text-primary);margin-bottom:16px;padding-bottom:8px;border-bottom:2px solid var(--bg-tertiary)}.article-section h3{font-size:1.2rem;font-weight:700;color:var(--text-primary);margin:24px 0 12px}.article-section p{color:var(--text-secondary);font-size:1rem;line-height:1.75;margin-bottom:16px}.article-section ol,.article-section ul{margin-left:24px;margin-bottom:20px;color:var(--text-secondary);line-height:1.75}.site-footer{background:var(--bg-primary);border-top:1px solid var(--border-color);padding:48px 0 32px;font-size:.9rem;color:var(--text-muted)}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;grid-gap:32px;gap:32px;margin-bottom:36px}.footer-col h4{font-size:.95rem;font-weight:700;color:var(--text-primary);margin-bottom:14px}.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:8px}.footer-col a{color:var(--text-secondary);text-decoration:none}.footer-col a:hover{color:var(--accent-primary);text-decoration:underline}.footer-bottom{padding-top:24px;border-top:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}@media (max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}@media (max-width:768px){.mobile-nav-toggle{display:block}.main-nav{display:none;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:var(--bg-primary);border-bottom:1px solid var(--border-color);padding:16px 20px;box-shadow:var(--shadow-md)}.main-nav.open{display:flex}.footer-grid{grid-template-columns:1fr}.page-title{font-size:1.65rem}}@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}