:root{--primary: #0284c7;--primary-hover: #0369a1;--primary-light: #e0f2fe;--primary-glow: rgba(2, 132, 199, .15);--bg-app: #f0f9ff;--bg-card: #ffffff;--bg-sidebar: #e0f2fe;--text-main: #0f172a;--text-muted: #64748b;--text-white: #ffffff;--border: #e2e8f0;--border-focus: #38bdf8;--success: #10b981;--danger: #ef4444;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .05);--radius: 12px;--radius-lg: 16px;--font: "Noto Sans KR", "Inter", system-ui, -apple-system, sans-serif;--font-size-base: 16px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font);font-size:var(--font-size-base);background-color:var(--bg-app);color:var(--text-main);height:100vh;height:100dvh;overflow:hidden;position:fixed;width:100%;line-height:1.5;-webkit-font-smoothing:antialiased}#root{height:100%}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#94a3b8}.auth-container{display:flex;justify-content:center;align-items:center;height:100vh;background:linear-gradient(135deg,#e0f2fe,#bae6fd);padding:20px}.auth-card{background:var(--bg-card);padding:40px;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);width:100%;max-width:420px;text-align:center;border:1px solid rgba(255,255,255,.8);animation:fadeIn .4s ease-out}.auth-logo{font-size:2rem;font-weight:700;color:var(--primary);margin-bottom:8px;letter-spacing:-.05em;display:flex;align-items:center;justify-content:center;gap:8px}.auth-subtitle{color:var(--text-muted);font-size:.95rem;margin-bottom:32px}.form-group{margin-bottom:20px;text-align:left}.form-label{display:block;font-size:.875rem;font-weight:600;color:var(--text-main);margin-bottom:6px}.form-input{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:var(--radius);font-family:inherit;font-size:.95rem;transition:all .2s ease;outline:none;background-color:#f8fafc}.form-input:focus{border-color:var(--border-focus);background-color:var(--bg-card);box-shadow:0 0 0 4px var(--primary-glow)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:12px 24px;background-color:var(--primary);color:var(--text-white);border:none;border-radius:var(--radius);font-family:inherit;font-size:.95rem;font-weight:600;cursor:pointer;transition:all .2s ease;box-shadow:0 4px 6px -1px #0284c733}.btn:hover{background-color:var(--primary-hover);transform:translateY(-1px);box-shadow:0 6px 8px -1px #0284c74d}.btn:active{transform:translateY(0)}.error-banner{background-color:#fee2e2;color:var(--danger);padding:12px;border-radius:var(--radius);font-size:.875rem;margin-bottom:20px;border:1px solid #fca5a5;animation:shake .3s ease-in-out}.app-layout{display:flex;flex-direction:column;height:100vh;height:100dvh;overflow:hidden;position:absolute;top:0;left:0;right:0;bottom:0}.header{background-color:var(--bg-sidebar);height:64px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;box-shadow:var(--shadow-sm);z-index:10}.logo-container{display:flex;align-items:center;gap:10px}.logo-text{font-size:1.25rem;font-weight:700;color:var(--primary);letter-spacing:-.03em}.user-profile{display:flex;align-items:center;gap:12px}.user-name{font-weight:600;font-size:.9rem}.btn-logout{background:transparent;border:1px solid var(--border);color:var(--text-muted);padding:6px 12px;border-radius:8px;font-size:.8rem;cursor:pointer;transition:all .2s}.btn-logout:hover{background-color:#f1f5f9;color:var(--danger);border-color:#fca5a5}.main-container{display:flex;flex:1;overflow:hidden;min-height:0}.sidebar{width:320px;background-color:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow-y:auto;padding:20px;gap:24px}.sidebar-section{display:flex;flex-direction:column;gap:12px}.section-title{font-size:.825rem;font-weight:800;text-transform:uppercase;color:#0f172a;letter-spacing:.05em;display:flex;align-items:center;gap:6px}.upload-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:20px;text-align:center;cursor:pointer;transition:all .2s;background-color:#fff}.upload-zone:hover{border-color:var(--primary);background-color:var(--primary-light)}.upload-text{font-size:.85rem;color:var(--text-muted);margin-top:8px}.file-list{display:flex;flex-direction:column;gap:8px;max-height:240px;overflow-y:auto;padding-right:4px}.file-item{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;background-color:#fff;border:1px solid var(--border);border-radius:var(--radius);transition:all .2s}.file-item:hover{border-color:var(--border-focus)}.file-item.selected{background-color:var(--primary-light);border-color:var(--primary)}.file-info{display:flex;align-items:center;gap:8px;flex:1;min-width:0;cursor:pointer}.file-name{font-size:.825rem;font-weight:600;color:#0f172a;white-space:normal;word-break:break-all;line-height:1.35;display:block}.btn-delete-file{background:transparent;border:none;color:var(--text-muted);cursor:pointer;padding:4px;border-radius:4px;display:flex;align-items:center}.btn-delete-file:hover{color:var(--danger);background-color:#fee2e2}.content-area{flex:1;display:flex;flex-direction:column;background-color:#f1f5f9;overflow:hidden;min-height:0}.tabs-nav{display:flex;background-color:var(--bg-card);border-bottom:1px solid var(--border);padding:0 20px}.tab-btn{background:transparent;border:none;border-bottom:3px solid transparent;padding:16px 20px;font-family:inherit;font-weight:600;font-size:.95rem;color:var(--text-muted);cursor:pointer;display:flex;align-items:center;gap:8px;transition:all .2s}.tab-btn:hover{color:var(--primary)}.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary)}.tab-panel{flex:1;display:flex;flex-direction:column;overflow:hidden;min-height:0}.chat-window{flex:1;display:flex;flex-direction:column;overflow:hidden;background-color:var(--bg-card);margin:16px;border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);border:1px solid var(--border)}.chat-messages{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior-y:contain;padding:20px;display:flex;flex-direction:column;gap:16px}.message-wrapper{display:flex;gap:12px;max-width:75%}.message-wrapper.user{align-self:flex-end;flex-direction:row-reverse}.message-wrapper.bot{align-self:flex-start}.message-avatar{width:36px;height:36px;border-radius:50%;overflow:hidden;background-color:var(--primary-light);border:1.5px solid var(--primary);flex-shrink:0;display:flex;align-items:center;justify-content:center}.message-avatar img{width:100%;height:100%;object-fit:cover}.message-bubble{padding:12px 16px;border-radius:var(--radius);font-size:var(--chat-font-size, .925rem);position:relative;box-shadow:var(--shadow-sm);word-break:break-word}.message-wrapper.user .message-bubble{background-color:var(--primary);color:var(--text-white);border-top-right-radius:2px}.message-wrapper.bot .message-bubble{background-color:#f1f5f9;color:var(--text-main);border-top-left-radius:2px}.message-username{font-size:.75rem;font-weight:700;color:var(--text-muted);margin-bottom:4px;display:block}.message-time{font-size:.7rem;color:var(--text-muted);align-self:flex-end;margin:0 4px}.system-message{align-self:center;background-color:#e2e8f0;color:var(--text-muted);font-size:.75rem;padding:6px 16px;border-radius:9999px;font-weight:500;max-width:90%;text-align:center}.citations-box{margin-top:8px;padding-top:8px;border-top:1px dashed var(--border);font-size:.775rem;color:var(--text-muted)}.citation-title{font-weight:600;color:var(--primary-hover);margin-bottom:2px}.citation-item{display:flex;align-items:center;gap:4px;margin-top:2px}.chat-input-container{padding:16px 20px;border-top:1px solid var(--border);display:flex;gap:12px;background-color:var(--bg-card);align-items:center}.chat-input{flex:1;padding:12px 16px;border:1px solid var(--border);border-radius:var(--radius);font-family:inherit;font-size:var(--chat-font-size, .95rem);outline:none;transition:all .2s;background-color:#f8fafc}.chat-input:focus{border-color:var(--border-focus);background-color:var(--bg-card);box-shadow:0 0 0 3px var(--primary-glow)}.btn-send{background-color:var(--primary);color:var(--text-white);border:none;width:44px;height:44px;border-radius:var(--radius);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;flex-shrink:0}.btn-send:hover{background-color:var(--primary-hover)}.btn-send:disabled{background-color:#cbd5e1;cursor:not-allowed}.messenger-container{margin:16px 16px 16px 0;position:relative;display:flex;flex-direction:row;gap:0;min-height:0;overflow:hidden}.messenger-rooms-sidebar{width:250px;border-right:1px solid #e2e8f0;background-color:#fff;display:flex;flex-direction:column;border-radius:12px 0 0 12px;min-height:0}.messenger-chat-area{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0;overflow:hidden}.messenger-header{padding:12px 20px;background-color:#f8fafc;border-bottom:1px solid var(--border);display:flex;flex-direction:column;gap:6px}.online-users-bar{display:flex;align-items:center;gap:8px;overflow-x:auto;padding:4px 0}.online-user-tag{display:inline-flex;align-items:center;gap:6px;background-color:var(--white);border:1px solid var(--border);padding:4px 10px;border-radius:20px;font-size:.8rem;font-weight:500;box-shadow:var(--shadow-sm);white-space:nowrap;animation:popIn .2s ease}.online-indicator{width:8px;height:8px;background-color:var(--success);border-radius:50%;box-shadow:0 0 0 2px #10b9814d}.online-users-count{font-size:.8rem;font-weight:600;color:var(--text-muted)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes popIn{0%{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-4px)}75%{transform:translate(4px)}}.btn-sidebar-toggle{display:none}.btn-attach{background:transparent;border:none;color:var(--text-muted);cursor:pointer;padding:8px;display:flex;align-items:center;justify-content:center;transition:color .2s}.btn-attach:hover{color:var(--primary)}.chat-image-container img{transition:transform .2s ease-in-out}.chat-image-container img:hover{transform:scale(1.02);box-shadow:0 10px 15px -3px #0000001a}@media (max-width: 768px){.btn-sidebar-toggle{display:inline-flex;align-items:center;justify-content:center;background:transparent;border:1px solid var(--border);color:var(--text-muted);width:36px;height:36px;border-radius:8px;cursor:pointer;transition:all .2s}.btn-sidebar-toggle:hover{background-color:#f1f5f9;color:var(--primary)}.main-container{flex-direction:column;position:relative}.sidebar{position:fixed;top:64px;left:-320px;width:300px;height:calc(100vh - 64px);z-index:100;transition:left .3s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-lg);background-color:var(--bg-sidebar);border-right:1px solid var(--border);max-height:none}.sidebar.open{left:0}.sidebar-overlay{position:fixed;top:64px;left:0;width:100vw;height:calc(100vh - 64px);background-color:#0006;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:99}.chat-window{margin:8px!important;flex:1;min-height:0}.tabs-nav{padding:0;width:100%;justify-content:space-between}.tab-btn{flex:1;padding:10px 4px;font-size:.8rem;display:flex;flex-direction:column;align-items:center;gap:4px}.tab-btn span{font-size:.7rem;white-space:normal;text-align:center}.messenger-container{flex-direction:column!important;margin:8px!important}.messenger-rooms-sidebar,.messenger-header{display:none!important}.chat-input-container{padding:10px 12px!important;gap:8px!important}.chat-input{padding:10px 12px!important}.btn-send,.btn-attach{width:38px!important;height:38px!important}.messenger-chat-area{border-radius:0 0 12px 12px!important}.user-status-text{display:none}.logo-container img{height:28px!important}.header{padding:0 12px}}@media (min-width: 769px){.sidebar-overlay{display:none}}@media (max-width: 768px){.app-layout{font-size:.95em}.sidebar{position:fixed;z-index:100;left:-280px;height:calc(100vh - 64px);transition:left .3s ease}.sidebar.open{left:0}.sidebar-overlay{display:block;position:fixed;top:64px;left:0;right:0;bottom:0;background:#0006;z-index:90}.main-container{flex-direction:column}.rag-panel,.messenger-panel{flex:none;width:100%;height:50%}.message-wrapper.bot{max-width:95%}}