body{font-family:'Nunito',sans-serif;background:#f0f7f0;min-height:100vh;display:flex;flex-direction:column}
nav{background:linear-gradient(135deg,var(--vd),var(--vm));padding:0 24px;display:flex;align-items:center;gap:12px;color:white;height:60px;box-shadow:0 2px 12px rgba(26,74,46,.3);flex-shrink:0}
nav .nb{display:flex;align-items:center;gap:10px;flex:1}
nav .nb i{font-size:1.3rem}
nav .nb span{font-family:'Merriweather',serif;font-size:.95rem}
.bb{background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.2);color:white;padding:7px 14px;border-radius:20px;cursor:pointer;font-family:'Nunito',sans-serif;font-size:.82rem;font-weight:600;display:flex;align-items:center;gap:6px}
.chat-wrap{flex:1;max-width:760px;width:100%;margin:0 auto;display:flex;flex-direction:column;padding:20px 16px 0}
.chat-header{background:white;border-radius:16px 16px 0 0;padding:18px 22px;border-bottom:2px solid var(--vs);display:flex;align-items:center;gap:14px}
.bot-avatar{width:46px;height:46px;background:linear-gradient(135deg,var(--vd),var(--vm));border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.4rem;flex-shrink:0}
.chat-header h3{font-family:'Merriweather',serif;color:var(--vd);font-size:1rem}
.chat-header p{font-size:.78rem;color:var(--cz);margin-top:2px}
.status-dot{width:8px;height:8px;background:#22c55e;border-radius:50%;display:inline-block;margin-right:4px;animation:blink 2s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.4}}
.msgs{flex:1;background:white;padding:18px;overflow-y:auto;display:flex;flex-direction:column;gap:14px;min-height:0;max-height:calc(100vh - 260px)}
.msg-row{display:flex;gap:10px;align-items:flex-end}
.msg-row.user{flex-direction:row-reverse}
.avatar{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.9rem;flex-shrink:0}
.avatar.bot{background:linear-gradient(135deg,var(--vd),var(--vm));color:white}
.avatar.user{background:linear-gradient(135deg,#3b82f6,#1d4ed8);color:white}
.bubble{max-width:75%;padding:11px 15px;border-radius:18px;font-size:.88rem;line-height:1.6;word-break:break-word}
.bubble.bot{background:var(--vs);color:var(--tx);border-bottom-left-radius:4px}
.bubble.user{background:linear-gradient(135deg,var(--vd),var(--vm));color:white;border-bottom-right-radius:4px}
.bubble.err{background:#fee2e2;color:#dc2626}
.bubble p{margin-bottom:6px}.bubble p:last-child{margin-bottom:0}
.bubble strong{font-weight:700}
.bubble ul,.bubble ol{padding-left:18px;margin:4px 0}
.bubble li{margin-bottom:2px}
.typing{display:flex;align-items:center;gap:5px;padding:12px 16px}
.typing span{width:7px;height:7px;border-radius:50%;background:var(--vm);animation:bounce .9s infinite}
.typing span:nth-child(2){animation-delay:.15s}
.typing span:nth-child(3){animation-delay:.3s}
@keyframes bounce{0%,60%,100%{transform:translateY(0)}30%{transform:translateY(-6px)}}
.input-area{background:white;border-radius:0 0 16px 16px;padding:14px 16px;border-top:2px solid var(--vs);display:flex;gap:10px;align-items:flex-end;margin-bottom:20px}
.input-area textarea{flex:1;border:2px solid #e2e8f0;border-radius:12px;padding:10px 14px;font-family:'Nunito',sans-serif;font-size:.9rem;outline:none;resize:none;max-height:120px;min-height:42px;line-height:1.5;transition:.2s;overflow-y:auto}
.input-area textarea:focus{border-color:var(--vm)}
.send-btn{width:42px;height:42px;background:linear-gradient(135deg,var(--vd),var(--vm));border:none;border-radius:12px;cursor:pointer;display:flex;align-items:center;justify-content:center;color:white;font-size:1.1rem;flex-shrink:0;transition:.2s}
.send-btn:hover{transform:scale(1.08)}
.send-btn:disabled{opacity:.5;cursor:default;transform:none}
.suggestions{display:flex;flex-wrap:wrap;gap:7px;padding:10px 18px;background:white;border-top:1px solid #f1f5f9}
.sug-btn{background:var(--vs);border:1px solid #a5d6a7;color:var(--vd);padding:5px 12px;border-radius:20px;font-size:.75rem;font-weight:700;cursor:pointer;font-family:'Nunito',sans-serif;transition:.15s}
.sug-btn:hover{background:#c8e6c9}
.welcome{text-align:center;padding:20px 10px}
.welcome .wi{font-size:2.5rem;margin-bottom:10px}
.welcome h4{font-family:'Merriweather',serif;color:var(--vd);font-size:1rem;margin-bottom:6px}
.welcome p{font-size:.82rem;color:var(--cz);line-height:1.6}