:root{--ink:#182028;--muted:#66717f;--line:#dfe6ee;--surface:#fff;--surface-soft:#f5f7fa;--navy:#25324a;--green:#2f8f68;--gold:#c59333;--red:#b94a48;--shadow:0 18px 50px #1d27341f}*{box-sizing:border-box}html,body{min-height:100%}body{color:var(--ink);background:linear-gradient(135deg,#25324a14,#0000 32%),linear-gradient(315deg,#2f8f6817,#0000 34%),#eef2f6;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,textarea{font:inherit}.page-shell{justify-content:center;align-items:stretch;min-height:100vh;padding:18px;display:flex}.chat-surface{box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#ffffffe0;border:1px solid #dfe6eee6}.chat-header{border-bottom:1px solid var(--line);background:#ffffffc7;align-items:center;gap:14px;padding:18px 22px;display:flex}.brand-mark,.message-avatar,.send-button{flex:none;justify-content:center;align-items:center;display:inline-flex}.brand-mark{background:var(--navy);color:#fff;border-radius:8px;width:48px;height:48px}.eyebrow{color:var(--green);letter-spacing:0;text-transform:uppercase;margin:0 0 4px;font-size:.78rem;font-weight:700}h1{letter-spacing:0;margin:0;font-size:clamp(1.3rem,2vw,1.9rem);line-height:1.08}.chat-surface{border-radius:8px;grid-template-rows:auto minmax(0,1fr) auto;width:min(100%,860px);min-height:calc(100vh - 36px);display:grid;overflow:hidden}.messages{flex-direction:column;gap:18px;padding:24px;display:flex;overflow-y:auto}.message{align-items:flex-start;gap:10px;max-width:88%;display:flex}.message.user{flex-direction:row-reverse;align-self:flex-end}.message-avatar{width:34px;height:34px;color:var(--navy);background:#e6ebf2;border-radius:8px;font-size:.78rem;font-weight:800}.message.user .message-avatar{background:var(--green);color:#fff}.message-bubble{border:1px solid var(--line);background:var(--surface);overflow-wrap:anywhere;border-radius:8px;padding:12px 14px;line-height:1.55}.message.user .message-bubble{background:var(--navy);color:#fff;border-color:#0000}.message-bubble p,.message-bubble ul,.message-bubble ol{margin:0}.message-bubble p+p,.message-bubble p+ul,.message-bubble p+ol,.message-bubble ul+p,.message-bubble ol+p{margin-top:10px}.message-bubble ul,.message-bubble ol{padding-left:20px}.message-bubble li+li{margin-top:4px}.message.user .message-bubble p{white-space:pre-wrap}.typing{min-width:34px;color:var(--muted);display:inline-flex}.composer-area{border-top:1px solid var(--line);background:#f5f7faf0;padding:14px}.starter-row{gap:8px;padding-bottom:10px;display:flex;overflow-x:auto}.starter-button{border:1px solid var(--line);max-width:min(360px,78vw);min-height:38px;color:var(--ink);cursor:pointer;text-align:left;white-space:normal;background:#fff;border-radius:8px;flex:none;padding:8px 11px}.starter-button:hover:not(:disabled){border-color:var(--green)}.starter-button:disabled,.send-button:disabled,textarea:disabled{cursor:not-allowed;opacity:.58}.composer{grid-template-columns:minmax(0,1fr) 42px;align-items:end;gap:10px;display:grid}textarea{resize:none;border:1px solid var(--line);width:100%;max-height:150px;color:var(--ink);background:#fff;border-radius:8px;outline:none;padding:12px 13px;line-height:1.45}textarea:focus{border-color:var(--green);box-shadow:0 0 0 3px #2f8f681f}.send-button{background:var(--green);color:#fff;cursor:pointer;border:0;border-radius:8px;width:42px;height:42px}.error-text{color:var(--red);margin:0 0 10px;font-size:.92rem}.spin{animation:.85s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width:840px){.page-shell{padding:10px}.chat-surface{min-height:calc(100vh - 20px)}.message{max-width:100%}}@media (max-width:520px){h1{font-size:1.35rem}.chat-header{padding:14px}.messages{padding:16px 12px}.message-avatar{width:30px;height:30px}}