:root{--bg: #fafaf5;--surface: #ffffff;--border: #e5e5d8;--muted: #6b7280;--text: #1c1917;--accent: #ca8a04;--header-bg: #1c1917}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--text);background:var(--bg)}.app{min-height:100vh;display:flex;flex-direction:column}.header{background:var(--header-bg);color:#fafaf5;display:flex;align-items:center;padding:0 24px;height:56px;gap:32px;border-bottom:1px solid #292524}.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:15px}.header-nav{display:flex;gap:8px}.nav-link{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:6px;color:#d6d3d1;font-size:13px;cursor:default}.nav-link.active{background:var(--accent);color:#1c1917}.main{flex:1;padding:28px 40px;max-width:1280px;width:100%;margin:0 auto}h1{margin:0 0 16px;font-size:22px}h3{margin:0 0 10px;font-size:14px;color:#292524}.muted{color:var(--muted);font-size:13px}.card{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:16px 18px;margin-top:16px}code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;background:#f5f5f0;padding:1px 6px;border-radius:4px}