:root{--primary-green: #0f9d58;--light-background: #f3fbf6;--muted-text: #7a7a7a;--sidebar-background: #f3f6f7;--accent-blue: #0b7bd6;--user-message-bg: #dff0ff;--assistant-message-bg: #eeeeee;--white: #ffffff;--border-radius: 12px;--shadow-light: 0 2px 8px rgba(0,0,0,.1);--shadow-medium: 0 3px 6px rgba(0,0,0,.12)}*{box-sizing:border-box;font-family:Inter,Segoe UI,Roboto,Arial,sans-serif}html,body,#root{height:100%;margin:0;background:var(--light-background)}.app-root{display:flex;height:100vh}.sidebar{width:320px;background:var(--sidebar-background);padding:24px;border-right:1px solid rgba(0,0,0,.03);overflow-y:auto}.logo{width:140px;margin-bottom:8px}.sidebar h2{margin:12px 0;font-size:22px;color:#333}.muted{color:var(--muted-text);font-size:14px;line-height:1.4}.new-chat-btn{display:block;width:100%;background:var(--primary-green);color:var(--white);padding:12px 16px;border-radius:var(--border-radius);border:none;font-size:16px;font-weight:500;margin:12px 0;cursor:pointer;transition:background-color .2s ease}.new-chat-btn:hover{background:#0e8a4d}.upload-card{margin-top:18px;background:var(--white);padding:16px;border-radius:var(--border-radius);box-shadow:var(--shadow-light)}.upload-card h3{margin:0 0 8px;color:#333}.upload-card input[type=file]{margin-bottom:10px;width:100%;padding:8px;border:1px dashed #ccc;border-radius:6px}.upload-btn{background:var(--primary-green);color:var(--white);border:none;padding:12px 16px;border-radius:8px;cursor:pointer;width:100%;margin-top:6px;font-weight:500;transition:background-color .2s ease}.upload-btn:hover:not(:disabled){background:#0e8a4d}.upload-btn:disabled{background:#ccc;cursor:not-allowed}.upload-progress{margin-top:8px;height:4px;background:#f0f0f0;border-radius:2px;overflow:hidden}.progress-bar{height:100%;background:var(--primary-green);animation:progressAnimation 1.5s ease-in-out infinite}@keyframes progressAnimation{0%{transform:translate(-100%)}to{transform:translate(100%)}}.conv-item{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.conv-title{background:var(--white);border-radius:8px;padding:10px;border:1px solid rgba(0,0,0,.06);width:100%;text-align:left;cursor:pointer;font-size:14px;transition:all .2s ease}.conv-title:hover{border-color:var(--accent-blue)}.conv-item.active .conv-title{box-shadow:0 0 0 2px #0b7bd633;border-color:var(--accent-blue)}.delete-btn{background:#f44;color:#fff;border:none;border-radius:6px;padding:6px 10px;cursor:pointer;font-size:12px;margin-left:8px;transition:background-color .2s ease}.delete-btn:hover{background:#c00}.main-area{flex:1;display:flex;flex-direction:column;overflow:hidden}.green-banner{background:var(--primary-green);color:var(--white);padding:28px 40px;text-align:center;margin:20px auto 10px;width:92%;border-radius:var(--border-radius);box-shadow:var(--shadow-medium)}.green-banner h1{margin:0;font-size:34px;font-weight:700}.green-banner p{margin:6px 0 0;font-size:17px;opacity:.95}.chat-area{padding:22px 34px;height:calc(100vh - 140px);display:flex;flex-direction:column}.messages-area{flex:1;overflow-y:auto;padding:18px;border-radius:var(--border-radius);background:transparent}.empty-state{color:var(--muted-text);padding:60px 20px;text-align:center;font-size:16px}.message{max-width:80%;margin:12px 0;padding:12px 16px;border-radius:14px;box-shadow:var(--shadow-light)}.message-assistant{background:var(--assistant-message-bg);align-self:flex-start}.message-user{background:var(--user-message-bg);align-self:flex-end}.typing-indicator{display:flex;align-items:center;gap:8px;color:var(--muted-text);font-style:italic}.typing-dots{display:flex;gap:4px}.dot{width:6px;height:6px;border-radius:50%;background:var(--muted-text);animation:typingAnimation 1.4s ease-in-out infinite both}.dot:nth-child(2){animation-delay:.2s}.dot:nth-child(3){animation-delay:.4s}@keyframes typingAnimation{0%,80%,to{transform:scale(.8);opacity:.5}40%{transform:scale(1);opacity:1}}.msg-text{line-height:1.6;word-wrap:break-word}.msg-text h1,.msg-text h2,.msg-text h3,.msg-text h4{margin:16px 0 8px;color:#1a1a1a}.msg-text h1{font-size:1.5em}.msg-text h2{font-size:1.3em}.msg-text h3{font-size:1.1em}.msg-text p{margin:8px 0}.msg-text ul,.msg-text ol{margin:8px 0;padding-left:24px}.msg-text li{margin:4px 0}.msg-text strong{font-weight:600;color:#1a1a1a}.msg-text em{font-style:italic;color:#666}.msg-text code{background:#f5f5f5;padding:2px 6px;border-radius:4px;font-family:Courier New,monospace;font-size:.9em}.msg-text pre{background:#f8f9fa;padding:12px;border-radius:6px;overflow-x:auto;margin:12px 0}.msg-text pre code{background:none;padding:0}.msg-text table{width:100%;border-collapse:collapse;margin:16px 0;background:var(--white);border-radius:8px;overflow:hidden;box-shadow:var(--shadow-light);font-size:14px}.msg-text th{background:#f8f9fa;font-weight:600;padding:12px 15px;text-align:left;border-bottom:2px solid #e9ecef;color:#495057}.msg-text td{padding:10px 15px;border-bottom:1px solid #e9ecef;text-align:left}.msg-text tr:last-child td{border-bottom:none}.msg-text tr:hover{background-color:#f8f9fa}.message-image{max-width:100%;height:auto;display:block;margin:10px 0;border-radius:8px;box-shadow:var(--shadow-light)}.preview-wrapper{display:flex;justify-content:center;width:100%}.table-preview-bubble{background:var(--white);border-radius:var(--border-radius);padding:12px;width:95%;max-width:1200px;box-shadow:var(--shadow-light);margin-top:8px}.table-preview-title{font-weight:600;margin-bottom:8px;color:#333}.table-preview-table-wrapper{width:100%;overflow-x:auto;margin-bottom:6px}.preview-table{border-collapse:collapse;width:100%;font-size:13px}.preview-table th,.preview-table td{border:1px solid rgba(0,0,0,.06);padding:6px 8px;text-align:left;white-space:nowrap}.small{font-size:12px;color:var(--muted-text)}.input-row{display:flex;gap:8px;margin-top:12px;align-items:center}.input-row input{flex:1;padding:16px 18px;border-radius:28px;border:1px solid rgba(0,0,0,.08);font-size:16px;outline:none;transition:border-color .2s ease}.input-row input:focus{border-color:var(--accent-blue)}.send-button{padding:12px 24px;background:var(--accent-blue);color:var(--white);border-radius:8px;border:none;cursor:pointer;font-weight:500;transition:background-color .2s ease;min-width:80px}.send-button:hover:not(:disabled){background:#08a15a}.send-button:disabled{background:#ccc;cursor:not-allowed}@media (max-width: 900px){.sidebar{display:none}.table-preview-bubble{width:100%}.message{max-width:92%}.msg-text table{font-size:12px}.msg-text th,.msg-text td{padding:8px 10px}.green-banner{width:95%;padding:20px}.green-banner h1{font-size:28px}.chat-area{padding:15px 20px}}