.app{min-height:100vh;display:flex;flex-direction:column;background:#fff}.header{padding:1rem 1.5rem;background:#fff;border-bottom:1px solid #e5e7eb;position:sticky;top:0;z-index:10}.header h1{font-size:.875rem;font-weight:500;color:#6b7280;display:flex;align-items:center;gap:.5rem}.chat-container{flex:1;display:flex;flex-direction:column;max-width:48rem;width:100%;margin:0 auto;padding:0 1rem}.messages{flex:1;overflow-y:auto;padding:2rem 0;margin-bottom:1rem}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;text-align:center;color:#6b7280}.empty-state h2{font-size:1.875rem;font-weight:400;margin-bottom:1rem;color:#111827}.empty-state p{font-size:1rem;color:#9ca3af}.message{padding:1.5rem 0;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.user{background:transparent}.message.assistant{background:#f9fafb;margin:0 -1rem;padding-left:1rem;padding-right:1rem}.message-content{max-width:100%;line-height:1.7;font-size:.9375rem;color:#374151;white-space:pre-wrap;word-wrap:break-word}.message.user .message-content{font-weight:400;color:#111827}.message-content.loading{display:flex;gap:.5rem;color:#9ca3af}.message-content.loading span{animation:bounce 1.4s infinite}.message-content.loading span:nth-child(2){animation-delay:.2s}.message-content.loading span:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,80%,to{transform:translateY(0)}40%{transform:translateY(-3px)}}.input-container{position:sticky;bottom:0;background:#fff;padding:1rem 0 2rem;border-top:1px solid #e5e7eb}.input-wrapper{display:flex;gap:.5rem;background:#fff;border:1px solid #d1d5db;border-radius:.75rem;padding:.5rem;box-shadow:0 2px 4px #0000000d;transition:border-color .2s,box-shadow .2s}.input-wrapper:focus-within{border-color:#9ca3af;box-shadow:0 4px 12px #00000014}input{flex:1;padding:.75rem .5rem;background:transparent;border:none;color:#111827;font-size:.9375rem}input:focus{outline:none}input::placeholder{color:#9ca3af}button{padding:.75rem 1rem;background:#2563eb;border:none;border-radius:.5rem;color:#fff;font-weight:500;font-size:.875rem;cursor:pointer;transition:background .2s;white-space:nowrap}button:hover:not(:disabled){background:#1d4ed8}button:disabled{opacity:.5;cursor:not-allowed}.messages::-webkit-scrollbar{width:6px}.messages::-webkit-scrollbar-track{background:transparent}.messages::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:3px}.messages::-webkit-scrollbar-thumb:hover{background:#9ca3af}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:#fff;color:#2d3748;min-height:100vh}#root{min-height:100vh}