body{margin:0;padding:0;background-color:#1e1e1e;font-family:Segoe UI,sans-serif;color:#fff;display:flex;justify-content:center;align-items:center;height:100vh}.upload-container{text-align:center;animation:fadeIn 1s ease-out}.title{font-size:2.8rem;margin-bottom:2rem;font-weight:700;color:#fff;text-shadow:0 2px 20px rgba(255,255,255,.15)}.upload-btn{background:linear-gradient(135deg,#8e2de2,#4a00e0);color:#fff;border:none;padding:16px 32px;font-size:1.2rem;border-radius:12px;cursor:pointer;transition:transform .2s ease,box-shadow .3s ease;box-shadow:0 10px 20px #8a2be24d}.upload-btn:hover{transform:scale(1.05);box-shadow:0 12px 25px #8a2be280}.upload-btn.disabled{opacity:.6;pointer-events:none}@keyframes fadeIn{0%{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}.chat-container{width:100%;max-width:100vw;padding:2rem 6rem;display:flex;flex-direction:column;height:100vh;box-sizing:border-box}.chat-log{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:16px;padding:2rem 4rem;background-color:#2a2a2a;border-radius:12px;scroll-behavior:smooth}.chat-msg{display:flex;flex-direction:column}.chat-msg.user{align-items:flex-end}.chat-msg.ai{align-items:flex-start}.bubble{background-color:#3b3b3b;padding:14px 20px;border-radius:16px;max-width:95%;line-height:1.5;white-space:pre-wrap;word-wrap:break-word;font-size:17px}.chat-msg.user .bubble{background-color:#0b93f6;color:#fff;border-bottom-right-radius:0}.chat-msg.ai .bubble{background-color:#2e2e2e;border-bottom-left-radius:0}.chat-input{display:flex;gap:1rem;padding:1rem 4rem}.chat-input input{flex:1;padding:14px;border-radius:8px;border:none;font-size:17px;background-color:#333;color:#fff}.chat-input input:focus{outline:none;border:1px solid #0b93f6}.chat-input button{padding:14px 20px;background-color:#0b93f6;color:#fff;border:none;border-radius:8px;font-weight:700;font-size:16px;cursor:pointer;transition:background-color .2s ease}.chat-input button:hover{background-color:#07c}.chat-log::-webkit-scrollbar{width:6px}.chat-log::-webkit-scrollbar-thumb{background:#555;border-radius:10px}.chat-log::-webkit-scrollbar-track{background:transparent}