*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--bg: #fff;--surface: #fafafa;--surface-alt: #f1f5f9;--border: #e2e8f0;--border-hover: #94a3b8;--txt: #0f172a;--txt2: #334155;--muted: #64748b;--faint: #94a3b8;--ghost: #cbd5e1;--accent: #0f172a;--accent-hover: #1e293b;--user-bg: #0f172a;--user-txt: #f8fafc;--bot-bg: #f1f5f9;--bot-txt: #1e293b}html,body{height:100%;font-family:DM Sans,sans-serif;background:var(--bg);color:var(--txt);-webkit-font-smoothing:antialiased}body{display:flex;flex-direction:column}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.icon{flex-shrink:0}.icon--sm{width:36px;height:36px}.icon--lg{width:56px;height:56px;margin-bottom:20px}.icon--xs{width:32px;height:32px;margin-top:2px}.icon svg{width:100%;height:100%;display:block}.header{position:sticky;top:0;z-index:100;background:#ffffffd9;backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.header-inner{max-width:720px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px}.header-left{display:flex;align-items:center;gap:12px;min-width:0}.header-text{display:flex;flex-direction:column;gap:1px;min-width:0}.header-title{font-size:16px;font-weight:700;line-height:1.3}.header-sub{font-size:12px;color:var(--muted);line-height:1.3}.header-brand{font-size:14px;font-weight:700;color:var(--text);text-decoration:none;letter-spacing:.5px;white-space:nowrap;flex-shrink:0;transition:opacity .2s}.header-brand:hover{opacity:.7}.brand-amp{color:var(--muted);font-weight:600}.chat{flex:1;overflow-y:auto;scroll-behavior:smooth}.chat-inner{max-width:720px;margin:0 auto;padding:0 20px 24px}.welcome{display:flex;flex-direction:column;align-items:center;text-align:center;padding-top:12vh}.welcome.hidden{display:none}.welcome-title{font-size:22px;font-weight:700;margin-bottom:8px;line-height:1.3}.welcome-sub{font-size:14.5px;color:var(--muted);max-width:400px;line-height:1.55;margin-bottom:28px}.suggestions{display:grid;grid-template-columns:1fr 1fr;gap:10px;width:100%;max-width:560px}.sug-btn{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:14px 16px;font:500 13.5px/1.45 DM Sans,sans-serif;color:var(--txt2);cursor:pointer;text-align:left;transition:border-color .2s,background .2s}.sug-btn:hover{border-color:var(--border-hover);background:var(--surface-alt)}.messages{display:flex;flex-direction:column;gap:16px;padding-top:24px}.msg{display:flex;gap:10px;animation:fadeUp .3s ease-out}.msg--user{justify-content:flex-end}.msg--bot{align-items:flex-start}.bubble{max-width:80%;padding:12px 16px;font-size:14.5px;line-height:1.6;word-break:break-word}.bubble--user{background:var(--user-bg);color:var(--user-txt);border-radius:18px 18px 4px}.bubble--bot{background:var(--bot-bg);color:var(--bot-txt);border-radius:18px 18px 18px 4px}.bubble--bot strong{font-weight:600}.typing{display:flex;gap:5px;align-items:center;padding:4px 0}.typing span{width:7px;height:7px;border-radius:50%;background:var(--faint);animation:bounce 1.4s ease-in-out infinite}.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}.bar{position:sticky;bottom:0;z-index:100;background:#ffffffd9;backdrop-filter:blur(12px);border-top:1px solid var(--border)}.bar-inner{max-width:720px;margin:0 auto;padding:14px 20px}.bar-row{display:flex;gap:10px;align-items:center}.field{flex:1;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:14px;font:14.5px DM Sans,sans-serif;color:var(--txt);outline:none;transition:border-color .2s}.field::placeholder{color:var(--ghost)}.field:focus{border-color:var(--border-hover)}.send{width:46px;height:46px;border-radius:50%;border:none;background:var(--ghost);color:#fff;display:flex;align-items:center;justify-content:center;cursor:not-allowed;flex-shrink:0;transition:background .2s}.send.active{background:var(--accent);cursor:pointer}.send.active:hover{background:var(--accent-hover)}.disclaimer{text-align:center;font-size:11.5px;color:var(--faint);margin-top:10px;line-height:1.4}@keyframes fadeUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes bounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-6px)}}@media(max-width:480px){.suggestions{grid-template-columns:1fr}.welcome{padding-top:8vh}.welcome-title{font-size:19px}.bubble{max-width:92%}.header-sub{display:none}.header-brand{font-size:12px}}