:root{--bg:#f6f7f9;--panel:#ffffff;--text:#17202a;--muted:#667085;--line:#d9dee7;--accent:#157347;--warn:#b54708;--danger:#b42318}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,Helvetica,sans-serif}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.shell{display:grid;grid-template-columns:240px 1fr;min-height:100vh}.nav{background:#111827;color:white;padding:18px}.nav h1{font-size:18px;margin:0 0 20px}.nav a{display:block;color:#e5e7eb;padding:10px 8px;border-radius:6px}.nav a:hover{background:#1f2937}.main{padding:22px}.toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:8px}.list{display:grid;grid-gap:8px;gap:8px}.row{padding:12px;border-bottom:1px solid var(--line)}.row:last-child{border-bottom:0}.muted{color:var(--muted);font-size:13px}.badge{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:999px;padding:2px 8px;font-size:12px}.badge.warn{border-color:#fedf89;color:var(--warn);background:#fffaeb}.grid{grid-gap:14px}.grid,.stats{display:grid;gap:14px}.stats{grid-template-columns:repeat(4,minmax(140px,1fr));grid-gap:14px;margin-bottom:14px}.stat{background:white;border:1px solid var(--line);border-radius:8px;padding:16px}.stat span{display:block;font-size:30px;font-weight:700}.stat label{display:block;color:var(--muted);margin-top:4px}.grid.two{grid-template-columns:minmax(280px,380px) 1fr}.input,.select,.textarea{width:100%;border:1px solid var(--line);border-radius:6px;padding:10px;background:white}.textarea{min-height:110px;resize:vertical}.button{border:0;border-radius:6px;padding:9px 12px;background:var(--accent);color:white;cursor:pointer}.button.secondary{background:#344054}.button.light{background:white;color:var(--text)}.button.light,.toggle-row{border:1px solid var(--line)}.toggle-row{display:flex;justify-content:space-between;align-items:center;gap:16px;border-radius:8px;padding:12px}.toggle-row span span{display:block;margin-top:3px}.toggle-row input{width:44px;height:24px;accent-color:var(--accent)}.messages{display:flex;flex-direction:column;gap:10px;min-height:420px;max-height:62vh;overflow:auto;padding:14px}.bubble{max-width:76%;border-radius:8px;padding:10px 12px;background:#eef2f6}.bubble.outbound{align-self:flex-end;background:#d1fadf}@media (max-width:860px){.shell{grid-template-columns:1fr}.nav{position:-webkit-sticky;position:sticky;top:0;z-index:10}.grid.two{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,minmax(120px,1fr))}}