*{box-sizing:border-box} body{margin:0;font-family:Arial,Helvetica,sans-serif;background:linear-gradient(135deg,#e8fff2,#eef3ff);color:#111}.chat-shell{max-width:850px;margin:20px auto;height:calc(100vh - 40px);background:#fff;border-radius:22px;box-shadow:0 18px 50px #0002;display:flex;flex-direction:column;overflow:hidden}.chat-head{display:flex;gap:14px;align-items:center;padding:18px;background:#0f8b4c;color:#fff}.logo{width:48px;height:48px;border-radius:50%;background:#fff;color:#0f8b4c;display:grid;place-items:center;font-weight:900;font-size:26px}.chat-head h1{margin:0;font-size:22px}.chat-head p{margin:4px 0 0;font-size:13px;opacity:.9}.messages{flex:1;overflow:auto;padding:18px;background:#f8fafc}.msg{max-width:82%;padding:12px 14px;margin:9px 0;border-radius:16px;line-height:1.45;white-space:pre-wrap}.msg.bot{background:#fff;border:1px solid #e5e7eb;border-top-left-radius:4px}.msg.user{background:#0f8b4c;color:#fff;margin-left:auto;border-top-right-radius:4px}.typing{opacity:.7}.chat-form{display:flex;gap:10px;padding:14px;border-top:1px solid #e5e7eb;background:#fff}.chat-form input{flex:1;padding:14px;border:1px solid #d1d5db;border-radius:14px;font-size:15px}.chat-form button,.btn{border:0;border-radius:14px;padding:12px 18px;background:#0f8b4c;color:#fff;font-weight:700;cursor:pointer;text-decoration:none;display:inline-block}.btn.muted{background:#334155}.wrap{max-width:900px;margin:25px auto;padding:18px}.card{background:#fff;border-radius:18px;box-shadow:0 12px 35px #0001}.alert{padding:12px;border-radius:12px;margin:10px 0}.ok{background:#dcfce7}.err{background:#fee2e2}table{width:100%;border-collapse:collapse;background:#fff}th,td{border-bottom:1px solid #e5e7eb;padding:10px;text-align:left;vertical-align:top}input,textarea,select{width:100%;padding:10px;border:1px solid #d1d5db;border-radius:10px}textarea{min-height:90px}.grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.topnav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:15px}.topnav a{background:#0f8b4c;color:white;text-decoration:none;padding:10px 12px;border-radius:10px}@media(max-width:700px){.chat-shell{height:100vh;margin:0;border-radius:0}.msg{max-width:94%}.grid{grid-template-columns:1fr}.chat-form{padding:10px}.chat-form button{padding:10px 12px}}