:root{--bg:#f5f7f8;--surface:#fff;--surface-strong:#eef4f2;--ink:#17211d;--muted:#5d6864;--line:#d9e1de;--blue:#2868b7;--green:#21725a;--amber:#a45f12;--danger:#b33030;--shadow:0 16px 45px #1f2d2814}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--ink);margin:0;font-family:Arial,Helvetica,sans-serif}button,input,textarea{font:inherit}button{cursor:pointer}.shell{grid-template-columns:248px minmax(0,1fr);min-height:100vh;display:grid}.sidebar{color:#f6fbf8;background:#18241f;height:100vh;padding:22px;position:sticky;top:0}.brand{align-items:center;gap:12px;margin-bottom:28px;display:flex}.brandMark{background:#2f745f;border-radius:8px;place-items:center;width:42px;height:42px;display:grid}.brand strong,.brand span{display:block}.brand span{color:#bdd2ca;margin-top:4px;font-size:13px}.nav{gap:6px;display:grid}.nav a{color:#e9f4ef;border-radius:7px;align-items:center;gap:10px;padding:11px 10px;text-decoration:none;display:flex}.nav 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