:root{--ink:#14201a;--ink-soft:#3d4f45;--muted:#6b7c72;--line:#d7e0da;--paper:#f3f7f4;--panel:#fff;--sidebar:#102018;--sidebar-text:#d8e6dd;--accent:#1f8a5b;--accent-deep:#146644;--warn:#b45309;--danger:#b42318;--human:#1d4ed8;--shadow:0 10px 30px #10201814;--radius:14px;color:var(--ink);background:var(--paper);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;font-family:Figtree,system-ui,sans-serif;line-height:1.45}*{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}body{background:radial-gradient(1200px 500px at 10% -10%, #1f8a5b1f, transparent 60%), radial-gradient(900px 400px at 100% 0%, #1420180f, transparent 50%), var(--paper)}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}h1,h2,.brand-mark{letter-spacing:-.02em;font-family:Libre Baskerville,Georgia,serif}.app-shell{grid-template-columns:260px 1fr;min-height:100vh;display:grid}.sidebar{color:var(--sidebar-text);background:linear-gradient(#0e1c15 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18px}.row-actions{flex-wrap:wrap;gap:8px;display:flex}.error-banner{color:#7f1d1d;background:#fde8e6;border:1px solid #f3c4bf;border-radius:10px;margin-bottom:14px;padding:10px 12px}.success-banner{color:#14532d;background:#ddf6e8;border:1px solid #b7ebc9;border-radius:10px;margin-bottom:14px;padding:10px 12px}.chat-layout{grid-template-columns:320px 1fr;min-height:70vh;display:grid}.chat-list{border-right:1px solid var(--line);overflow:auto}.chat-item{text-align:left;border:0;border-bottom:1px solid var(--line);cursor:pointer;background:0 0;width:100%;padding:14px;display:block}.chat-item:hover,.chat-item.active{background:#edf6f0}.chat-item .title{margin-bottom:4px;font-weight:700}.chat-item .meta{color:var(--muted);font-size:.82rem}.chat-thread{flex-direction:column;min-height:70vh;display:flex}.thread-messages{background:linear-gradient(#f3f7f4b3,#0000 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