:root{--bg:#0f0f10;--surface:#18181a;--border:#2a2a2c;--fg:#e4e4e6;--subtle:#888;--accent:#4a8df0;--ok:#4caf7a;--warn:#d9a345;--danger:#d94545;--danger-bg:#d945450d;--code-bg:#ffffff0a}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--fg);margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:14px;line-height:1.5}.app{flex-direction:column;min-height:100vh;display:flex}.topbar{border-bottom:1px solid var(--border);background:var(--surface);align-items:center;padding:12px 24px;display:flex}.brand{align-items:center;gap:10px;display:flex}.brand-mark{background:var(--accent);border-radius:2px;width:10px;height:10px}.subtle{color:var(--subtle);font-size:12px}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.main{flex:1;padding:24px}.content{max-width:980px;margin:0 auto}.page-header{border-bottom:1px solid var(--border);align-items:flex-start;gap:12px;margin-bottom:20px;padding-bottom:16px;display:flex}.page-header h1{margin:0 0 4px;font-size:22px}.ph-purpose{opacity:.7;margin:0;font-size:13px}.card{background:var(--surface);border:1px solid var(--border);border-radius:8px;margin-bottom:0;padding:14px}.card-head{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}a{color:var(--accent)}a:hover{opacity:.85}button{font-family:inherit}