:root{--bg-color: #1a1a1a;--surface-color: #2c2c2c;--primary-color: #4f46e5;--text-color: #e5e7eb;--text-muted-color: #9ca3af;--border-color: #4b5563;--font-family: "Inter", sans-serif}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-color);overflow:hidden}#root{display:flex;height:100vh}.container{display:flex;width:100%;height:100%}.sidebar{width:320px;background-color:#212121;border-right:1px solid var(--border-color);padding:24px;display:flex;flex-direction:column;gap:24px}.sidebar-header{font-size:1.25rem;font-weight:600}.pdf-upload-area{border:2px dashed var(--border-color);border-radius:8px;padding:32px;text-align:center;cursor:pointer;transition:background-color .2s ease,border-color .2s ease}.pdf-upload-area.is-dragging{background-color:#4f46e51a;border-color:var(--primary-color)}.upload-icon{width:48px;height:48px;margin:0 auto 16px;color:var(--text-muted-color)}.pdf-upload-area p{color:var(--text-muted-color);font-size:.875rem}.pdf-list-header{font-weight:600;margin-bottom:8px}.pdf-list{list-style:none;display:flex;flex-direction:column;gap:12px;overflow-y:auto}.pdf-item{background-color:var(--surface-color);padding:12px;border-radius:6px;display:flex;align-items:center;gap:12px;transition:background-color .2s ease;border-left:3px solid transparent}.pdf-item.ready{cursor:pointer}.pdf-item.ready:hover{background-color:#3f3f46}.pdf-item.active{background-color:#3a3a3a;border-left:3px solid var(--primary-color)}.pdf-icon{width:24px;height:24px;color:var(--primary-color);flex-shrink:0}.pdf-info{flex-grow:1;overflow:hidden}.pdf-name{font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.pdf-status{font-size:.75rem;display:flex;align-items:center;gap:6px}.status-dot{width:8px;height:8px;border-radius:50%}.status-dot.processing{background-color:#f59e0b;animation:pulse 1.5s infinite}@keyframes pulse{0%{opacity:1}50%{opacity:.5}to{opacity:1}}.status-dot.ready{background-color:#10b981}.chat-container{flex:1;display:flex;flex-direction:column;height:100vh}.chat-window{flex-grow:1;overflow-y:auto;padding:24px}.message{display:flex;gap:16px;margin-bottom:24px;max-width:800px}.message.user{justify-content:flex-end;margin-left:auto}.message .avatar{width:32px;height:32px;border-radius:50%;background-color:var(--surface-color);display:flex;align-items:center;justify-content:center;font-weight:600;flex-shrink:0}.message.user .avatar{background-color:var(--primary-color);order:2}.message-content{background-color:var(--surface-color);padding:12px 16px;border-radius:8px;max-width:80%}.message.user .message-content{background-color:var(--primary-color);order:1}.message-content p{white-space:pre-wrap;line-height:1.6}.message-input-form{padding:24px;border-top:1px solid var(--border-color);background-color:#212121}.input-wrapper{position:relative;display:flex;align-items:center}.message-input{width:100%;background-color:var(--surface-color);border:1px solid var(--border-color);border-radius:8px;padding:12px 48px 12px 16px;color:var(--text-color);font-family:var(--font-family);font-size:1rem;resize:none}.message-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px #4f46e580}.message-input:disabled{background-color:#374151;cursor:not-allowed}.send-button{position:absolute;right:8px;top:50%;transform:translateY(-50%);background-color:var(--primary-color);border:none;border-radius:6px;width:32px;height:32px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#fff}.send-button:disabled{background-color:#4b5563;cursor:not-allowed}.send-button svg{width:20px;height:20px}.typing-indicator{font-style:italic;color:var(--text-muted-color)}