:root{--bg:#f7f7f8;--surface:#fff;--border:#e4e4e7;--text:#18181b;--muted:#71717a;--accent:#1a73e8;--accent-hover:#1557b0;--user-bubble:#1a73e8;--user-text:#fff}*{box-sizing:border-box}body,html{margin:0;height:100%}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.muted{color:var(--muted)}.center-screen{min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:24px}.landing{max-width:420px;text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:40px 32px}.landing h1{margin:0 0 12px;font-size:28px}.google-btn{margin-top:24px;display:inline-flex;align-items:center;gap:10px;padding:10px 20px;font-size:15px;font-weight:600;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:8px;cursor:pointer}.google-btn:hover{background:#f1f3f4}.fine-print{margin-top:16px;font-size:12px;color:var(--muted)}.app-shell{height:100dvh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--surface);border-bottom:1px solid var(--border)}.brand{font-weight:700}.user-box{display:flex;align-items:center;gap:12px;font-size:14px}.link-btn{background:none;border:none;color:var(--accent);cursor:pointer;font-size:14px;padding:0}.chat{min-height:0;max-width:760px;width:100%;margin:0 auto}.chat,.chat-scroll{flex:1 1;display:flex;flex-direction:column}.chat-scroll{overflow-y:auto;padding:24px 20px;gap:12px}.empty-state{margin:auto;text-align:center;max-width:520px}.empty-state h2{margin-bottom:8px}.suggestions{margin-top:20px;display:flex;flex-direction:column;gap:10px}.suggestion{padding:12px 16px;text-align:left;font-size:14px;background:var(--surface);border:1px solid var(--border);border-radius:10px;cursor:pointer}.suggestion:hover{border-color:var(--accent)}.msg{display:flex}.msg.user{justify-content:flex-end}.bubble{max-width:80%;padding:10px 14px;border-radius:14px;font-size:15px;line-height:1.5;white-space:pre-wrap;background:var(--surface);border:1px solid var(--border)}.msg.user .bubble{background:var(--user-bubble);color:var(--user-text);border-color:var(--user-bubble)}.form-card{margin-top:10px;padding:12px;background:#f0f6ff;border:1px solid #c7dcfc;border-radius:10px}.form-card-title{display:block;font-weight:600;font-size:13px;margin-bottom:6px}.form-card-links{display:flex;gap:16px;font-size:14px}.form-card-links a{color:var(--accent)}.composer{display:flex;gap:10px;padding:16px 20px;background:var(--surface);border-top:1px solid var(--border)}.composer input{flex:1 1;padding:12px 14px;font-size:15px;border:1px solid var(--border);border-radius:10px;outline:none}.composer input:focus{border-color:var(--accent)}.composer button{padding:12px 22px;font-size:15px;font-weight:600;color:#fff;background:var(--accent);border:none;border-radius:10px;cursor:pointer}.composer button:hover:not(:disabled){background:var(--accent-hover)}.composer button:disabled{opacity:.5;cursor:default}