:root{--bg-color:#f4f6f8;--text-color:#1f2937;--card-bg:#fff;--primary-color:#3b82f6;--primary-hover:#2563eb;--danger-color:#ef4444;--success-color:#10b981;--border-color:#e5e7eb;--input-bg:#f9fafb;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000001a;--table-header-bg:#f3f4f6;--table-stripe-bg:#f9fafb;--editable-bg:#eff6ff;--annotated-row-bg:#ecfdf5;--modal-overlay:#111827b3;--modal-highlight-bg:#fffbe6;--modal-info-bg:#f8f9fa;--copy-btn-bg:#e9ecef;--copy-btn-border:#ccc;--copy-btn-color:#212529;--chat-bubble-bg:#fff;--chat-bubble-text:#1f2937}.dark-mode{--bg-color:#111827;--text-color:#f3f4f6;--card-bg:#1f2937;--primary-color:#60a5fa;--primary-hover:#3b82f6;--danger-color:#f87171;--success-color:#34d399;--border-color:#374151;--input-bg:#374151;--table-header-bg:#111827;--table-stripe-bg:#1f2937;--editable-bg:#1e3a8a;--annotated-row-bg:#064e3b;--modal-overlay:#000000d9;--modal-highlight-bg:#4a4130;--modal-info-bg:#3e5163;--copy-btn-bg:#444;--copy-btn-border:#666;--copy-btn-color:#ecf0f1;--chat-bubble-bg:#374151;--chat-bubble-text:#f3f4f6}body{background-color:var(--bg-color);color:var(--text-color);margin:0;padding:20px;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;transition:background-color .3s,color .3s}#root{background:var(--card-bg);max-width:1600px;box-shadow:var(--shadow-md);border-radius:16px;min-height:80vh;margin:auto;padding:30px;position:relative}h1{color:var(--text-color);flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:5px;font-size:1.75rem;font-weight:700;display:flex}.role-badge{text-transform:uppercase;letter-spacing:.5px;border-radius:20px;padding:4px 10px;font-size:.7rem;font-weight:800}.role-badge.creator{background:var(--primary-color);color:#fff}.role-badge.editor{color:#fff;background:#8b5cf6}.session-info-bar{border-bottom:1px solid var(--border-color);justify-content:flex-end;margin-bottom:25px;padding-bottom:15px;display:flex}.user-count-badge{background-color:var(--input-bg);border:1px solid var(--border-color);border-radius:20px;padding:6px 16px;font-size:.85rem;font-weight:600}.dark-mode-container{z-index:500;position:absolute;top:30px;right:30px}.top-controls{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:15px;margin-bottom:25px;display:flex}.control-buttons-group{flex-wrap:wrap;gap:10px;display:flex}input,button,select,textarea{border:1px solid var(--border-color);background-color:var(--input-bg);color:var(--text-color);border-radius:8px;outline:none;padding:10px 16px;font-family:inherit;font-size:.9rem;transition:all .2s}input:focus,select:focus,textarea:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #3b82f633}button{background-color:var(--input-bg);cursor:pointer;justify-content:center;align-items:center;font-weight:600;display:inline-flex}button:hover:not(:disabled){background-color:#e5e7eb;transform:translateY(-1px)}.dark-mode button:hover:not(:disabled){background-color:#4b5563}button:disabled{opacity:.6;cursor:not-allowed;transform:none}button.primary-btn{background-color:var(--primary-color);color:#fff;border:none}button.primary-btn:hover{background-color:var(--primary-hover)}button.danger-btn{background-color:var(--danger-color);color:#fff;border:none}button.danger-btn:hover{filter:brightness(.9)}button.success-btn{background-color:var(--success-color);color:#fff;border:none}.search-controls-container{border-bottom:1px solid var(--border-color);background-color:var(--card-bg);border-radius:8px;flex-wrap:wrap;align-items:center;gap:15px;margin-bottom:15px;padding:15px;display:flex}.search-bar-group{flex:2;align-items:center;gap:10px;min-width:300px;display:flex;position:relative}.search-bar-group input[type=text]{flex-grow:1;width:100%}.search-nav-buttons{background:var(--input-bg);border:1px solid var(--border-color);border-radius:6px;align-items:center;gap:5px;padding:4px;display:flex}.search-nav-buttons button{border:none;min-width:30px;margin:0;padding:6px 12px;font-size:14px;line-height:1}.search-nav-buttons span{white-space:nowrap;font-variant-numeric:tabular-nums;padding:0 8px;font-size:.85rem}.jump-bar-group{flex:1;justify-content:flex-end;align-items:center;gap:10px;display:flex}.jump-bar-group input[type=number]{width:80px}.error-message{color:var(--danger-color);font-size:.85rem}.table-container{border:1px solid var(--border-color);background:var(--card-bg);box-shadow:var(--shadow-sm);border-radius:12px;overflow:auto}.table-container.scroll-height{max-height:70vh}table{border-collapse:separate;border-spacing:0;width:100%}th,td{text-align:left;border-bottom:1px solid var(--border-color);border-right:1px solid var(--border-color);vertical-align:top;min-width:150px;padding:14px 16px}th{background-color:var(--table-header-bg);color:var(--text-color);z-index:20;white-space:nowrap;font-weight:600;position:sticky;top:0}tr:last-child td{border-bottom:none}tr:nth-child(2n){background-color:var(--table-stripe-bg)}.annotated-row{background-color:var(--annotated-row-bg)!important}.editable-cell{color:var(--text-color);cursor:text;position:relative;background-color:var(--editable-bg)!important;border-left:3px solid var(--primary-color)!important}.editable-cell:focus{outline:2px solid var(--primary-color);outline-offset:-2px}.cell-select{width:100%;color:inherit;cursor:pointer;background:0 0;border:none;margin:0;padding:0;font-family:inherit;font-weight:500}.cell-select:focus{box-shadow:none}.search-highlight{color:#000;background-color:#fde047;border-radius:4px;padding:2px 4px;font-weight:700}.index-column{background-color:var(--table-header-bg);color:#6b7280;z-index:15;text-align:center;font-size:.75rem;font-weight:700;position:sticky;left:0;width:30px!important;min-width:30px!important;max-width:30px!important;padding:8px 1px!important}.index-header{z-index:20;text-align:center;position:sticky;left:0;background-color:var(--border-color)!important;width:30px!important;min-width:30px!important;max-width:30px!important;padding:8px 1px!important}.excel-letter-header{background-color:var(--table-stripe-bg);color:#6b7280;text-align:center;border-bottom:1px solid var(--border-color);z-index:21;padding:4px;font-size:.75rem;font-weight:700;position:sticky;top:0}thead tr:nth-child(2) th{z-index:20;top:29px}.excel-corner-cell{background-color:var(--table-stripe-bg);z-index:22;border-right:1px solid var(--border-color);border-bottom:1px solid var(--border-color);position:sticky;top:0;left:0;width:30px!important;min-width:30px!important;max-width:30px!important}.pagination-controls{flex-wrap:wrap;justify-content:center;align-items:center;gap:15px;padding:20px 0;display:flex}.modal-overlay{background:var(--modal-overlay);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-content{background:var(--card-bg);box-shadow:var(--shadow-lg);border:1px solid var(--border-color);border-radius:16px;width:95%;max-width:900px;max-height:90vh;padding:30px;animation:.3s cubic-bezier(.175,.885,.32,1.275) modalPop;overflow-y:auto}@keyframes modalPop{0%{opacity:0;transform:scale(.95)translateY(10px)}to{opacity:1;transform:scale(1)translateY(0)}}.alert-modal-content{text-align:center;max-width:400px}.alert-modal-actions{gap:10px;margin-top:20px;display:flex}.alert-modal-actions button{flex:1}.copy-action-btn{cursor:pointer;border:1px solid var(--copy-btn-border);background:var(--copy-btn-bg);color:var(--copy-btn-color);border-radius:4px;margin-left:10px;padding:5px 10px;font-size:.75rem}.settings-grid{grid-template-columns:1fr 1fr;gap:30px;display:grid}.settings-single-col{max-width:600px;margin:0 auto;display:block}.settings-section h3{border-bottom:1px solid var(--border-color);color:var(--primary-color);margin-top:0;margin-bottom:15px;padding-bottom:10px}.setting-explanation{color:#6c757d;margin-bottom:15px;font-size:.85rem}.guest-info-box{background-color:var(--editable-bg);border:1px solid var(--primary-color);color:var(--text-color);text-align:center;border-radius:8px;padding:15px;font-size:.9rem}.column-config-item{background:var(--table-stripe-bg);border:1px solid var(--border-color);border-radius:8px;margin-bottom:10px;padding:12px}.column-config-header{justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.tag-input-container{flex-wrap:wrap;gap:5px;margin-top:8px;display:flex}.option-tag{background:var(--border-color);border-radius:12px;align-items:center;gap:5px;padding:2px 8px;font-size:.75rem;display:flex}.option-tag span{cursor:pointer;font-weight:700}.option-tag span:hover{color:var(--danger-color)}.switch-container{cursor:pointer;-webkit-user-select:none;user-select:none;justify-content:space-between;align-items:center;padding:8px 0;display:flex}.switch-input{opacity:0;width:0;height:0;position:absolute}.switch-slider{background-color:#d1d5db;border-radius:24px;flex-shrink:0;width:44px;height:24px;transition:all .3s;position:relative}.switch-slider:before{content:"";background:#fff;border-radius:50%;width:20px;height:20px;transition:all .3s;position:absolute;top:2px;left:2px;box-shadow:0 1px 3px #0000004d}.switch-input:checked+.switch-slider{background-color:var(--success-color)}.switch-input:checked+.switch-slider:before{transform:translate(20px)}.remote-cursor-cell{z-index:10;position:relative}.remote-user-flag{color:#fff;white-space:nowrap;z-index:100;pointer-events:none;border-radius:4px 4px 4px 0;padding:2px 8px;font-size:11px;font-weight:700;position:absolute;top:-22px;left:-2px;box-shadow:0 2px 5px #0000004d}tbody tr:first-child .remote-user-flag{border-radius:0 4px 4px;top:100%;left:-2px}.app-footer{border-top:1px solid var(--border-color);text-align:center;color:#9ca3af;margin-top:50px;padding-top:20px;font-size:.85rem}.app-footer p{margin:5px 0}.app-footer a{color:var(--primary-color);text-decoration:none}.app-footer a:hover{text-decoration:underline}@media (max-width:768px){#root{margin-top:0;padding:15px}h1{margin-top:40px;font-size:1.4rem}.dark-mode-container{top:15px;right:15px}.settings-grid{grid-template-columns:1fr}.top-controls{flex-direction:column;align-items:stretch}.control-buttons-group button{flex-grow:1}.search-controls-container{flex-direction:column;align-items:stretch;gap:12px;padding:10px}.search-bar-group,.jump-bar-group{flex:100%;justify-content:space-between;width:100%}.search-bar-group{flex-direction:column;align-items:stretch}.search-nav-buttons{justify-content:center;width:100%;margin-top:5px}.jump-bar-group input[type=number]{flex-grow:1}.app-footer{padding:20px 10px;font-size:.8rem}.pagination-controls button{flex:1;padding:12px}.pagination-controls span{text-align:center;order:-1;width:100%;margin:5px 0}}.toast-container{z-index:9999;pointer-events:none;flex-direction:column;gap:10px;display:flex;position:fixed;bottom:20px;right:20px}.toast{color:#fff;pointer-events:auto;background:#1f2937;border-left:5px solid #0000;border-radius:8px;align-items:center;gap:12px;min-width:280px;padding:12px 20px;font-size:.95rem;animation:.3s cubic-bezier(.175,.885,.32,1.275) slideIn;display:flex;box-shadow:0 8px 20px #0003}.toast.success{border-left-color:var(--success-color)}.toast.error{border-left-color:var(--danger-color)}.toast.info{border-left-color:var(--primary-color)}.toast span{font-size:1.2rem;line-height:1}@keyframes slideIn{0%{opacity:0;transform:translate(120%)}to{opacity:1;transform:translate(0)}}@media (max-width:768px){.toast-container{bottom:10px;left:20px;right:20px}.toast{box-sizing:border-box;width:100%;min-width:0}}.dark-mode-container{z-index:500;background:var(--card-bg);box-shadow:var(--shadow-md);border:1px solid var(--border-color);border-radius:30px;align-items:center;gap:15px;padding:8px 16px;display:flex;position:absolute;top:30px;right:30px}.dark-mode-container .switch-container{gap:0;margin:0;padding:0}.dark-mode-container .switch-label{color:var(--text-color);letter-spacing:.5px;cursor:pointer;margin-right:12px;font-size:.9rem;font-weight:700}.dark-mode-container .switch-slider{background-color:#e5e7eb;border-radius:30px;width:50px;height:28px;transition:all .4s cubic-bezier(.4,0,.2,1);position:relative;box-shadow:inset 0 2px 4px #0000001a}.dark-mode-container .switch-slider:before{content:"";background:#fff;border-radius:50%;width:22px;height:22px;transition:all .4s cubic-bezier(.4,0,.2,1);position:absolute;top:3px;left:3px;box-shadow:0 2px 4px #0003}.dark-mode-container .switch-input:checked+.switch-slider{background-color:#3b82f6}.dark-mode-container .switch-input:checked+.switch-slider:before{background-color:#fff;transform:translate(22px)}.dark-mode .dark-mode-container{background:#1f2937;border-color:#374151}.dark-mode .dark-mode-container .switch-slider{background-color:#374151}.dark-mode .dark-mode-container .switch-input:checked+.switch-slider{background-color:#60a5fa}.app-footer{border-top:1px solid var(--border-color);color:#9ca3af;flex-direction:column;align-items:center;gap:8px;margin-top:60px;padding-top:20px;font-size:.9rem;display:flex}.app-footer strong{color:var(--primary-color);font-weight:600}@media (max-width:768px){.dark-mode-container{padding:6px 12px;top:20px;right:20px}.dark-mode-container .switch-label{font-size:.8rem}}.chat-toggle-btn{background-color:var(--primary-color);cursor:pointer;z-index:1000;border-radius:50%;justify-content:center;align-items:center;width:60px;height:60px;transition:transform .2s;display:flex;position:fixed;bottom:20px;right:20px;box-shadow:0 4px 10px #0000004d}.chat-toggle-btn:hover{transform:scale(1.1)}.chat-toggle-btn.hidden{display:none}.unread-badge{background-color:var(--danger-color);color:#fff;border:2px solid #fff;border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;font-size:.75rem;font-weight:700;display:flex;position:absolute;top:-5px;right:-5px}.chat-window{background-color:var(--card-bg);z-index:1001;border:1px solid var(--border-color);border-radius:12px;flex-direction:column;width:320px;height:450px;transition:transform .3s cubic-bezier(.175,.885,.32,1.275);display:flex;position:fixed;bottom:20px;right:20px;overflow:hidden;transform:translateY(120%);box-shadow:0 5px 20px #00000040}.chat-window.open{transform:translateY(0)}.chat-header{background-color:var(--primary-color);color:#fff;cursor:pointer;justify-content:space-between;align-items:center;padding:12px 15px;font-weight:700;display:flex}.close-chat{color:#fff;background:0 0;border:none;padding:0;font-size:.8rem}.chat-messages{background-color:var(--bg-color);flex-direction:column;flex:1;gap:10px;padding:15px;display:flex;overflow-y:auto}.message-bubble{word-wrap:break-word;border-radius:12px;max-width:80%;padding:8px 12px;font-size:.9rem;position:relative;box-shadow:0 1px 2px #0000001a}.my-msg{background-color:var(--primary-color);color:#fff;border-bottom-right-radius:2px;align-self:flex-end}.other-msg{background-color:var(--chat-bubble-bg);color:var(--chat-bubble-text);border:1px solid var(--border-color);border-bottom-left-radius:2px;align-self:flex-start}.chat-input-area{background-color:var(--card-bg);border-top:1px solid var(--border-color);gap:8px;padding:10px;display:flex}.chat-input-area input{background-color:var(--input-bg);color:var(--text-color);border:1px solid var(--border-color);border-radius:20px;flex:1;padding:8px;font-size:.85rem}.chat-input-area button{color:var(--primary-color);background:0 0;border:none;padding:0 5px;font-size:1.2rem}.mention-list{background:var(--card-bg);border:1px solid var(--border-color);z-index:1002;border-radius:8px;max-height:150px;position:absolute;bottom:60px;left:10px;right:10px;overflow-y:auto;box-shadow:0 -4px 10px #0000001a}.mention-item{border-bottom:1px solid var(--border-color);cursor:pointer;align-items:center;gap:8px;padding:8px 12px;display:flex}.mention-item:hover{background-color:var(--table-stripe-bg)}.mention-item .dot{border-radius:50%;width:8px;height:8px}.waiting-screen{background:var(--bg-color);z-index:2000;text-align:center;flex-direction:column;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.loader-spinner{border:5px solid var(--border-color);border-top:5px solid var(--primary-color);border-radius:50%;width:50px;height:50px;margin-bottom:20px;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.approval-badge-container{margin-right:15px;position:relative}.blink-animation{animation:2s infinite blink}@keyframes blink{0%{opacity:1}50%{opacity:.7}to{opacity:1}}.approval-dropdown{background:var(--card-bg);border:1px solid var(--border-color);width:280px;box-shadow:var(--shadow-lg);z-index:500;border-radius:8px;margin-top:10px;animation:.2s slideDown;position:absolute;top:100%;right:0}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.approval-header{border-bottom:1px solid var(--border-color);background:var(--table-header-bg);border-radius:8px 8px 0 0;justify-content:space-between;align-items:center;padding:10px 15px;display:flex}.approval-header h4{margin:0;font-size:.9rem}.close-x{color:var(--text-color);background:0 0;border:none;padding:0 5px;font-size:1.2rem}.approval-list{max-height:250px;overflow-y:auto}.approval-item{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:10px 15px;display:flex}.approval-info{align-items:center;gap:8px;display:flex}.approval-info .dot{border-radius:50%;width:10px;height:10px}.approval-actions{gap:5px;display:flex}.small-btn{padding:4px 8px;font-size:.8rem}