:root{--navy:#073b4c;--teal:#0b7a75;--mint:#dff5ef;--sand:#f7f4ee;--ink:#172b35;--muted:#64757d;--white:#fff;--danger:#a33}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at top,#dff5ef 0,#f7f4ee 45%,#eef2f1 100%);color:var(--ink);font-family:"Segoe UI",Tahoma,Arial,sans-serif;min-height:100vh}.shell{width:min(820px,100%);height:100vh;margin:auto;background:rgba(255,255,255,.96);display:grid;grid-template-rows:auto 1fr auto auto;box-shadow:0 0 50px #073b4c18}.topbar{display:flex;align-items:center;gap:14px;padding:18px 22px;background:linear-gradient(135deg,var(--navy),#075f63);color:white}.brand-mark{width:46px;height:46px;border-radius:15px;background:#fff;color:var(--teal);display:grid;place-items:center;font-weight:800;font-size:26px}.topbar h1{font-size:20px;margin:0 0 4px}.topbar p{font-size:13px;margin:0;opacity:.85}.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#5ff0a5;margin-inline-end:7px}.language{margin-inline-start:auto;border:1px solid #ffffff55;background:#ffffff18;color:white;padding:8px 12px;border-radius:12px;cursor:pointer}.messages{overflow-y:auto;padding:24px;scroll-behavior:smooth}.message{max-width:78%;margin:0 0 14px;padding:13px 16px;border-radius:18px;line-height:1.65;white-space:pre-wrap;overflow-wrap:anywhere}.message.assistant{background:var(--sand);border-start-start-radius:5px}.message.user{background:var(--teal);color:white;margin-inline-start:auto;border-start-end-radius:5px}.message.typing{color:var(--muted);width:max-content}.suggestions{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}.suggestions button{border:1px solid #0b7a7544;background:white;color:var(--teal);border-radius:999px;padding:9px 13px;cursor:pointer}.notice{margin:0 18px 8px;padding:10px 14px;border-radius:10px;background:#fff0f0;color:var(--danger);font-size:13px}.composer{display:flex;align-items:flex-end;gap:10px;padding:14px 18px;border-top:1px solid #e4e9e7;background:white}.composer textarea{flex:1;resize:none;max-height:130px;border:1px solid #d4ddda;border-radius:16px;padding:12px 14px;font:inherit;outline:none}.composer textarea:focus{border-color:var(--teal);box-shadow:0 0 0 3px #0b7a7518}.composer button{border:0;width:46px;height:46px;border-radius:15px;background:var(--teal);color:white;font-size:20px;cursor:pointer;transform:scaleX(-1)}.composer button:disabled{opacity:.5;cursor:wait}footer{text-align:center;padding:0 16px 13px;color:var(--muted);font-size:11px}@media(max-width:600px){.topbar{padding:14px}.messages{padding:16px}.message{max-width:88%}.topbar h1{font-size:17px}.brand-mark{width:40px;height:40px}.composer{padding:10px}}