.message{display:flex;gap:12px;margin-bottom:24px;animation:slideIn .3s ease-out}@keyframes slideIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.message-avatar{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;transition:all .3s ease}.message:hover .message-avatar{transform:scale(1.05)}.message-user .message-avatar{background:linear-gradient(135deg,#2563eb,#3b82f6);box-shadow:0 4px 12px #2563eb40}.message-ai .message-avatar{background:linear-gradient(135deg,#e2e8f0,#cbd5e1);box-shadow:0 2px 8px #00000014}.message-content{flex:1;min-width:0}.message-sender{font-weight:500;font-size:12px;margin-bottom:6px;color:#64748b}.message-text{background:#fff;padding:12px 16px;border-radius:12px;line-height:1.6;color:#1e293b;word-wrap:break-word;white-space:pre-wrap;border:1px solid #e2e8f0;box-shadow:0 2px 6px #0000000a;transition:all .3s ease}.message:hover .message-text{box-shadow:0 4px 12px #00000014;transform:translateY(-1px)}.message-user .message-text{background:linear-gradient(135deg,#2563eb,#3b82f6);color:#fff;border:1px solid #1e40af;box-shadow:0 4px 12px #2563eb33}.message-user:hover .message-text{box-shadow:0 6px 16px #2563eb4d}.message-ai .message-text{background:#fff;border:1px solid #e2e8f0}.message-time{font-size:11px;color:#94a3b8;margin-top:6px;transition:color .2s ease}.message:hover .message-time{color:#64748b}.chat-input-container{display:flex;gap:12px;padding:20px 32px;background:linear-gradient(to top,#fff,#fafbfc);border-top:1px solid #e5e7eb;box-shadow:0 -2px 12px #00000005}.chat-input{flex:1;padding:12px 16px;border:2px solid #e5e7eb;border-radius:12px;font-size:14px;font-family:inherit;resize:none;transition:all .3s ease;min-height:48px;max-height:120px;background:#fff;color:#1e293b}.chat-input::placeholder{color:#9ca3af}.chat-input:hover{border-color:#cbd5e1}.chat-input:focus{outline:none;border-color:#2563eb;background:#fff;box-shadow:0 0 0 4px #2563eb14,0 2px 8px #0000000a}.chat-input:disabled{background:#f3f4f6;cursor:not-allowed;opacity:.5}.chat-send-button{width:48px;height:48px;border:none;border-radius:12px;background:linear-gradient(135deg,#2563eb,#3b82f6);color:#fff;font-size:20px;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 4px 12px #2563eb40}.chat-send-button:hover:not(:disabled){background:linear-gradient(135deg,#1e40af,#2563eb);transform:translateY(-2px);box-shadow:0 6px 20px #2563eb59}.chat-send-button:active:not(:disabled){transform:translateY(0);box-shadow:0 2px 8px #2563eb4d}.chat-send-button:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app{min-height:100vh;background:linear-gradient(135deg,#e0e7ff,#dbeafe,#e0f2fe);display:flex;align-items:center;justify-content:center;padding:20px}.chat-container{width:100%;max-width:1000px;height:90vh;background:#fff;border-radius:20px;box-shadow:0 10px 40px #2563eb14,0 2px 12px #0000000a;display:flex;flex-direction:column;overflow:hidden;border:1px solid rgba(37,99,235,.08);transition:box-shadow .3s ease}.chat-header{background:linear-gradient(135deg,#2563eb,#3b82f6);color:#fff;padding:24px 32px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #1e40af;box-shadow:0 2px 12px #2563eb26}.chat-header-content h1{font-size:24px;margin-bottom:4px;font-weight:600;letter-spacing:-.3px;text-shadow:0 1px 2px rgba(0,0,0,.1)}.chat-header-content p{font-size:14px;opacity:.95;color:#fffffff2;font-weight:400}.clear-button{padding:10px 18px;background:#ffffff26;border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:8px;cursor:pointer;font-size:14px;font-weight:500;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.clear-button:hover{background:#ffffff40;border-color:#fff6;transform:translateY(-2px);box-shadow:0 4px 12px #0003}.chat-messages{flex:1;overflow-y:auto;padding:32px;background:linear-gradient(to bottom,#fafbfc,#f8fafc)}.welcome-message{text-align:center;padding:80px 20px;color:#64748b}.welcome-icon{font-size:64px;margin-bottom:24px;filter:drop-shadow(0 4px 8px rgba(37,99,235,.2));transition:transform .3s ease}.welcome-icon:hover{transform:scale(1.05)}.welcome-message h2{font-size:26px;margin-bottom:12px;color:#1e293b;font-weight:600}.welcome-message p{font-size:15px;margin-bottom:32px;color:#475569}.welcome-message ul{list-style:none;display:inline-block;text-align:left}.welcome-message li{padding:10px 16px;font-size:14px;color:#334155;transition:all .2s ease;border-radius:8px}.welcome-message li:hover{background:#2563eb0d;transform:translate(4px)}.welcome-message li:before{content:"• ";color:#2563eb;margin-right:8px;font-size:16px;font-weight:600}.typing-indicator{display:flex;align-items:center;gap:10px;padding:0 0 8px;color:#64748b;font-size:13px;animation:fadeIn .3s}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.typing-dot{width:8px;height:8px;background:#2563eb;border-radius:50%;animation:bounce 1.4s infinite ease-in-out both}.typing-dot:nth-child(1){animation-delay:-.32s}.typing-dot:nth-child(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.error-message{background:linear-gradient(135deg,#fee2e2,#fecaca);color:#dc2626;padding:12px 16px;border-radius:10px;margin:16px 0;display:flex;align-items:center;gap:10px;font-size:14px;animation:slideIn .3s;border:1px solid #fca5a5;box-shadow:0 2px 8px #dc26261a}.error-icon{font-size:20px}.chat-messages::-webkit-scrollbar{width:8px}.chat-messages::-webkit-scrollbar-track{background:transparent}.chat-messages::-webkit-scrollbar-thumb{background:linear-gradient(to bottom,#cbd5e0,#94a3b8);border-radius:4px}.chat-messages::-webkit-scrollbar-thumb:hover{background:linear-gradient(to bottom,#94a3b8,#64748b)}@media (max-width: 768px){.app{padding:0}.chat-container{height:100vh;max-width:100%;border-radius:0}.chat-header{padding:18px 20px}.chat-header-content h1{font-size:22px}.chat-messages{padding:20px}}