:root{--primary:#2563eb;--accent:#16a34a;--bg:#f8f9fa;--surface:#fff;--text:#0d0d0d;--muted:#6b7280;--line:#00000014;--peer:#2563eb0f;--selected:#16a34a1f;--conflict:#dc26261a}*{box-sizing:border-box}html,body{height:100%}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif}a{color:inherit;text-decoration:none}button{font-family:inherit}.container{max-width:1080px;margin:0 auto;padding:0 16px 80px}@media (min-width:480px){.container{padding:0 20px 80px}}.header{border-bottom:1px solid var(--line);z-index:50;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#f8f9faf5;justify-content:space-between;align-items:center;gap:8px;padding:10px 0;display:flex;position:sticky;top:0}.brand{letter-spacing:-.2px;color:var(--text);flex-shrink:0;align-items:center;gap:8px;min-height:44px;font-size:15px;font-weight:700;display:flex}@media (max-width:400px){.brand 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