.app{width:100%;height:100%;display:flex;flex-direction:row;background-color:#fff;overflow:hidden}@media (max-width: 768px){.app{position:relative}}.sidebar{width:280px;height:100%;background-color:#f8f9fa;border-right:1px solid #e1e4e8;display:flex;flex-direction:column;overflow:hidden;transition:width .3s ease,transform .3s ease;position:relative;z-index:1001}.sidebar.collapsed{width:0;border-right:none}.sidebar.collapsed>*{opacity:0;pointer-events:none}.sidebar-toggle{position:fixed;left:280px;top:50%;transform:translateY(-50%);width:32px;height:48px;background-color:#f8f9fa;border:1px solid #e1e4e8;border-left:none;border-radius:0 8px 8px 0;cursor:pointer;display:flex;align-items:center;justify-content:center;color:#6e7781;font-size:.8rem;transition:left .3s ease,background-color .2s;z-index:1002;box-shadow:2px 0 8px #0000000d}.sidebar.collapsed~.sidebar-toggle{left:0}.sidebar-toggle:hover{background-color:#e1e4e8;color:#24292e}@media (max-width: 768px){.sidebar{position:fixed;left:0;top:0;width:280px;z-index:1001;box-shadow:2px 0 8px #0000001a;transform:translate(0)}.sidebar.collapsed{transform:translate(-100%);width:280px}.sidebar.collapsed>*{opacity:1;pointer-events:auto}.sidebar-toggle{position:fixed;left:280px;top:20px;transform:translateY(0);z-index:1002}.sidebar.collapsed~.sidebar-toggle{left:0}}.sidebar-header{padding:20px;border-bottom:1px solid #e1e4e8;display:flex;justify-content:space-between;align-items:center}.sidebar-header h2{font-size:1.5rem;font-weight:600;color:#24292e;margin:0}.create-btn{background-color:#a855f7;color:#fff;border:none;padding:8px 16px;border-radius:6px;font-size:.875rem;cursor:pointer;font-weight:500;transition:background-color .2s}.create-btn:hover{background-color:#9333ea}.create-menu{position:fixed;top:70px;left:180px;background:#fff;border:1px solid #e1e4e8;border-radius:8px;box-shadow:0 8px 24px #0000001f;z-index:2000;overflow:hidden}.create-menu button{display:block;width:100%;padding:12px 20px;text-align:left;border:none;background:#fff;cursor:pointer;font-size:.875rem;transition:background-color .15s}.create-menu button:hover{background-color:#f6f8fa}.search-box{padding:16px 20px;border-bottom:1px solid #e1e4e8}.search-box input{width:100%;padding:8px 12px;border:1px solid #d0d7de;border-radius:6px;font-size:.875rem;outline:none}.search-box input:focus{border-color:#0969da;box-shadow:0 0 0 3px #0969da1a}.documents-list{flex:1;overflow-y:auto;padding:8px}.document-item{display:flex;align-items:center;padding:8px;margin-bottom:2px;border-radius:6px;cursor:pointer;transition:background-color .15s,box-shadow .15s;position:relative}.document-item:hover{background-color:#e1e4e8;box-shadow:0 1px 3px #0000000f}.document-item.active{background-color:#f3e8ff;box-shadow:0 1px 3px #a855f726}.document-item.active:hover{background-color:#f3e8ff;box-shadow:0 1px 4px #a855f733}.document-item.dragging{opacity:.5}.folder-toggle{width:20px;font-size:.7rem;color:#6e7781;cursor:pointer;-webkit-user-select:none;user-select:none;display:inline-flex;align-items:center;justify-content:center;margin-right:4px}.folder-toggle:hover{color:#24292e}.doc-icon{font-size:1rem;margin-right:8px;flex-shrink:0;color:#6e7781;font-weight:300;display:flex;align-items:center;justify-content:center}.document-item.active .doc-icon{color:#a855f7}.doc-name{font-size:.875rem;color:#24292e;font-weight:500;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}.doc-name-input{flex:1;font-size:.875rem;font-weight:500;padding:2px 6px;border:1px solid #a855f7;border-radius:3px;outline:none;background:#fff;min-width:0}.doc-actions{display:flex;align-items:center;gap:4px;margin-left:4px;position:relative}.menu-btn{width:24px;height:24px;border:none;background:transparent;color:#6e7781;font-size:1.2rem;line-height:1;cursor:pointer;opacity:0;transition:opacity .15s,color .15s,background-color .15s;padding:0;display:flex;align-items:center;justify-content:center;border-radius:4px}.document-item:hover .menu-btn{opacity:1}.menu-btn:hover{color:#6e7781;background-color:#0000000d}.star-btn{width:24px;height:24px;border:none;background:transparent;color:#6e7781;font-size:1.1rem;line-height:1;cursor:pointer;opacity:0;transition:opacity .15s,color .15s,background-color .15s,transform .15s;padding:0;display:flex;align-items:center;justify-content:center;border-radius:4px}.document-item:hover .star-btn{opacity:1}.star-btn.starred{opacity:1!important;color:#fbbf24}.star-btn:hover{color:#fbbf24;background-color:#fbbf241a;transform:scale(1.1)}.star-btn.starred:hover{color:#f59e0b}.context-menu{position:absolute;right:0;top:28px;background:#fff;border:1px solid #e1e4e8;border-radius:6px;box-shadow:0 8px 24px #00000026;z-index:1100;min-width:140px;overflow:hidden;animation:fadeIn .15s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.context-menu button{display:block;width:100%;padding:8px 12px;text-align:left;border:none;background:#fff;cursor:pointer;font-size:.875rem;color:#24292e;transition:background-color .15s}.context-menu button:hover:not(:disabled){background-color:#f6f8fa}.context-menu button:disabled{color:#8c959f;cursor:not-allowed}.context-menu button.delete-option{color:#cf222e}.context-menu button.delete-option:hover{background-color:#ffebe9}.folder-contents{margin-left:0;position:relative}.folder-contents:before{content:"";position:absolute;left:20px;top:0;bottom:0;width:1px;background-color:#d0d7de}.document-wrapper{position:relative}.drop-indicator{position:relative;height:2px;background-color:#a855f7;margin:-1px 0;border-radius:1px;pointer-events:none;z-index:10}.drop-indicator:before{content:"";position:absolute;left:0;top:-3px;width:6px;height:6px;border-radius:50%;background-color:#a855f7}.document-item.drop-target{background-color:#f3e8ff!important;outline:2px dashed #a855f7;outline-offset:-2px}.empty-state{text-align:center;padding:40px 20px;color:#6e7781}.empty-state p{margin:8px 0;font-size:.875rem}.empty-state .hint{font-size:.8rem;color:#8c959f}.sidebar-footer{padding:16px 20px;border-top:1px solid #e1e4e8;background-color:#f8f9fa;display:flex;flex-direction:column;gap:12px}.user-info{display:flex;align-items:center}.user-email{font-size:.75rem;color:#6e7781;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.signout-btn{width:100%;padding:8px 16px;background-color:transparent;color:#6e7781;border:1px solid #d0d7de;border-radius:6px;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s}.signout-btn:hover{background-color:#f6f8fa;border-color:#a855f7;color:#a855f7}.spreadsheet-view{width:100%;height:100%;overflow:auto;background-color:#fff;outline:none;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.spreadsheet-grid{display:grid;grid-template-columns:50px repeat(10,100px);grid-auto-rows:28px;gap:0;width:fit-content;min-width:100%}.cell{border-right:1px solid #e0e0e0;border-bottom:1px solid #e0e0e0;display:flex;align-items:center;justify-content:center;background-color:#fff;position:relative}.corner-cell{background-color:#f8f9fa;border-right:1px solid #c0c0c0;border-bottom:1px solid #c0c0c0}.header-cell{background-color:#f8f9fa;font-weight:400;font-size:.75rem;color:#5f6368;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;text-align:center}.column-header{border-bottom:1px solid #c0c0c0}.row-header{border-right:1px solid #c0c0c0;font-size:.75rem}.data-cell{padding:2px 7px;cursor:cell;background-color:#fff;justify-content:flex-start;color:#202124;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.data-cell:hover{background-color:#f8f9fa}.data-cell.selected{box-shadow:inset 0 0 0 2px #a855f7;z-index:10}.data-cell.editing{box-shadow:inset 0 0 0 2px #a855f7;padding:0;z-index:10}.cell-content{width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.813rem;color:inherit;line-height:1.5}.cell-link{color:#1a73e8;text-decoration:underline;cursor:pointer}.cell-link:hover{color:#0d47a1}.cell-input{width:100%;height:100%;border:none;outline:none;padding:2px 7px;font-size:.813rem;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background-color:#fff;z-index:2;line-height:1.5;caret-color:#a855f7;user-select:text;-webkit-user-select:text;-moz-user-select:text;-ms-user-select:text}.data-cell.referenced{background-color:#f3e8ff!important;box-shadow:inset 0 0 0 2px #a855f7;z-index:9}.data-cell.nav-target{background-color:#f3e8ff!important;box-shadow:inset 0 0 0 3px #a855f7;z-index:11}.data-cell.in-range{background-color:#f3e8ff!important;box-shadow:inset 0 0 0 2px #a855f7;z-index:9}.data-cell.range-selected{background-color:#f3e8ff!important;z-index:9}.formatting-toolbar{display:flex;align-items:center;gap:4px;padding:8px 12px;background-color:#f8f9fa;border-bottom:1px solid #e0e0e0;position:sticky;top:0;z-index:100}.toolbar-group{display:flex;align-items:center;gap:2px}.toolbar-separator{width:1px;height:24px;background-color:#dadce0;margin:0 4px}.toolbar-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border:1px solid transparent;border-radius:4px;background-color:transparent;color:#5f6368;font-size:14px;cursor:pointer;transition:background-color .15s ease,border-color .15s ease}.toolbar-btn:hover:not(:disabled){background-color:#e8eaed;border-color:#dadce0}.toolbar-btn.active{background-color:#e8eaed;border-color:#5f6368;color:#202124}.toolbar-btn:disabled{color:silver;cursor:not-allowed;opacity:.5}.toolbar-btn strong,.toolbar-btn em,.toolbar-btn u{font-size:14px;font-style:normal;font-weight:400}.toolbar-btn strong{font-weight:700}.toolbar-btn em{font-style:italic}.align-icon{display:flex;flex-direction:column;gap:2px;width:16px}.align-icon div{height:2px;background-color:currentColor}.align-left div:nth-child(1){width:100%}.align-left div:nth-child(2){width:75%}.align-left div:nth-child(3){width:60%}.align-center div:nth-child(1){width:100%;margin:0 auto}.align-center div:nth-child(2){width:75%;margin:0 auto}.align-center div:nth-child(3){width:60%;margin:0 auto}.align-right div:nth-child(1){width:100%;margin-left:auto}.align-right div:nth-child(2){width:75%;margin-left:auto}.align-right div:nth-child(3){width:60%;margin-left:auto}.border-menu{position:absolute;top:100%;left:0;margin-top:4px;background-color:#fff;border:1px solid #dadce0;border-radius:4px;box-shadow:0 2px 8px #00000026;padding:8px;min-width:180px;z-index:200}.border-menu-section{display:flex;align-items:center;gap:8px;margin-bottom:8px}.border-menu-section label{font-size:12px;color:#5f6368;min-width:40px}.border-menu-section select,.border-menu-section input[type=color]{flex:1;padding:4px;border:1px solid #dadce0;border-radius:2px;font-size:12px}.border-menu-divider{height:1px;background-color:#dadce0;margin:8px 0}.border-menu-btn{width:100%;padding:6px 8px;text-align:left;background-color:transparent;border:none;border-radius:2px;font-size:12px;color:#202124;cursor:pointer;transition:background-color .15s ease}.border-menu-btn:hover{background-color:#f8f9fa}.cell-type-dropdown{padding:4px 8px;border:1px solid #dadce0;border-radius:4px;background-color:#fff;color:#202124;font-size:12px;cursor:pointer;transition:border-color .15s ease,background-color .15s ease}.cell-type-dropdown:hover:not(:disabled){border-color:#5f6368;background-color:#f8f9fa}.cell-type-dropdown:disabled{background-color:#f8f9fa;color:silver;cursor:not-allowed;opacity:.6}.hyperlink-dialog-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.hyperlink-dialog{background-color:#fff;border-radius:8px;padding:24px;box-shadow:0 4px 16px #0003;min-width:400px;max-width:90%}.hyperlink-dialog h3{margin:0 0 16px;font-size:18px;color:#202124;font-weight:500}.hyperlink-dialog input{width:100%;padding:8px 12px;border:1px solid #dadce0;border-radius:4px;font-size:14px;margin-bottom:16px;box-sizing:border-box}.hyperlink-dialog input:focus{outline:none;border-color:#a855f7;box-shadow:0 0 0 2px #a855f71a}.hyperlink-dialog-buttons{display:flex;gap:8px;justify-content:flex-end}.hyperlink-dialog-buttons button{padding:8px 16px;border:1px solid #dadce0;border-radius:4px;background-color:#fff;color:#202124;font-size:14px;cursor:pointer;transition:background-color .15s ease,border-color .15s ease}.hyperlink-dialog-buttons button:hover:not(:disabled){background-color:#f8f9fa;border-color:#5f6368}.hyperlink-dialog-buttons button:first-child{background-color:#a855f7;color:#fff;border-color:#a855f7}.hyperlink-dialog-buttons button:first-child:hover:not(:disabled){background-color:#9333ea;border-color:#9333ea}.hyperlink-dialog-buttons button:disabled{opacity:.5;cursor:not-allowed}.color-menu{position:absolute;top:100%;left:0;margin-top:4px;background-color:#fff;border:1px solid #dadce0;border-radius:4px;box-shadow:0 2px 8px #00000026;padding:12px;min-width:280px;z-index:200;max-height:500px;overflow-y:auto}.color-menu-section{margin-bottom:8px}.color-menu-section:last-child{margin-bottom:0}.color-section-label{font-size:11px;font-weight:600;color:#5f6368;text-transform:uppercase;letter-spacing:.5px;display:block;margin-bottom:8px}.color-presets{display:flex;gap:8px}.color-preset-btn{flex:1;min-height:32px;border:1px solid #dadce0;border-radius:4px;background-color:#fff;cursor:pointer;transition:border-color .15s ease,box-shadow .15s ease;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:500}.color-preset-btn:hover{border-color:#5f6368;box-shadow:0 1px 3px #0000001a}.color-menu-divider{height:1px;background-color:#e0e0e0;margin:12px 0}.color-grid{display:flex;flex-direction:column;gap:2px}.color-grid-row{display:flex;gap:2px}.color-grid-cell{width:24px;height:24px;border:1px solid #dadce0;border-radius:2px;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease;padding:0}.color-grid-cell:hover{transform:scale(1.15);box-shadow:0 2px 4px #0003;z-index:1;border-color:#5f6368}.color-section-header{display:flex;justify-content:space-between;align-items:center;cursor:pointer;margin-bottom:8px;-webkit-user-select:none;user-select:none}.color-section-header:hover .color-section-label,.color-section-header:hover .expand-icon{color:#202124}.expand-icon{font-size:10px;color:#5f6368;transition:color .15s ease,transform .15s ease}.color-section-header:hover .expand-icon{transform:scale(1.2)}.mathnote-view{width:100%;height:100%;display:grid;grid-template-columns:1fr 1fr;gap:0;overflow:hidden}.mathnote-editor{height:100%;border-right:1px solid #e1e4e8;overflow:auto}.mathnote-input{width:100%;height:100%;padding:20px;border:none;outline:none;font-family:Monaco,Menlo,Consolas,monospace;font-size:.875rem;line-height:1.8;resize:none;background-color:#fff;color:#24292e}.mathnote-input::placeholder{color:#8c959f}.mathnote-preview{height:100%;padding:20px;overflow:auto;background-color:#f6f8fa}.mathnote-line{display:flex;justify-content:space-between;align-items:center;padding:4px 0;font-family:Monaco,Menlo,Consolas,monospace;font-size:.875rem;line-height:1.8;min-height:1.8em}.mathnote-line.text{color:#24292e}.mathnote-line.variable{color:#0969da;font-weight:500}.mathnote-line.formula{color:#6e7781}.line-content{flex:1}.line-result{margin-left:20px;padding:2px 12px;background-color:#ddf4ff;color:#0969da;border-radius:4px;font-weight:600;white-space:nowrap}.mathnote-line.variable .line-result{background-color:#ddf4ff;color:#0969da}.mathnote-line.formula .line-result{background-color:#fff8c5;color:#7d4e00}.main-content{flex:1;height:100%;background-color:#fff;overflow:auto}.welcome-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;text-align:center;padding:40px}.welcome-screen h1{font-size:2.5rem;color:#24292e;margin-bottom:16px}.welcome-screen p{font-size:1.1rem;color:#6e7781}.error-screen{display:flex;align-items:center;justify-content:center;height:100%;text-align:center}.error-screen h2{color:#cf222e}.document-view{height:100%;display:flex;flex-direction:column}.document-header{padding:20px 32px;border-bottom:1px solid #e1e4e8;display:flex;align-items:center;gap:16px}.document-header h2{font-size:1.5rem;color:#24292e;margin:0}.document-title{cursor:pointer;padding:4px 8px;margin:-4px -8px;border-radius:6px;transition:background-color .15s}.document-title:hover{background-color:#f6f8fa}.document-title-input{font-size:1.5rem;font-weight:600;color:#24292e;padding:4px 8px;margin:-4px -8px;border:2px solid #a855f7;border-radius:6px;outline:none;background:#fff;font-family:inherit}.document-type{padding:4px 12px;background-color:#ddf4ff;color:#0969da;border-radius:12px;font-size:.75rem;font-weight:600;text-transform:uppercase}.document-body{flex:1;padding:32px;overflow:auto}.hello-world-content{max-width:800px;margin:0 auto}.hello-world-content h3{font-size:1.75rem;color:#24292e;margin-bottom:16px}.hello-world-content p{font-size:1rem;color:#6e7781;line-height:1.6;margin-bottom:12px}@media (max-width: 768px){.welcome-screen{padding:20px}.welcome-screen h1{font-size:1.8rem}.welcome-screen p{font-size:1rem}.document-header{padding:16px 20px;flex-wrap:wrap}.document-header h2{font-size:1.25rem}.document-body{padding:20px}}@media (max-width: 480px){.welcome-screen h1{font-size:1.5rem}.document-header{padding:12px 16px}.document-body{padding:16px}}.auth-container{width:100vw;height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.auth-card{background:#fff;border-radius:16px;box-shadow:0 20px 60px #0000004d;padding:48px;width:100%;max-width:420px}.auth-header{text-align:center;margin-bottom:32px}.auth-header h1{font-size:2rem;font-weight:700;color:#a855f7;margin:0 0 8px}.auth-header p{font-size:.875rem;color:#6e7781;margin:0}.auth-form{display:flex;flex-direction:column;gap:20px}.form-group{display:flex;flex-direction:column;gap:8px}.form-group label{font-size:.875rem;font-weight:500;color:#24292e}.form-group input{padding:12px 16px;border:1px solid #d0d7de;border-radius:8px;font-size:.875rem;font-family:inherit;transition:all .2s}.form-group input:focus{outline:none;border-color:#a855f7;box-shadow:0 0 0 3px #a855f71a}.form-group input:disabled{background-color:#f6f8fa;cursor:not-allowed}.error-message{padding:12px 16px;background-color:#ffebe9;color:#cf222e;border-radius:8px;font-size:.875rem}.success-message{padding:12px 16px;background-color:#dafbe1;color:#1a7f37;border-radius:8px;font-size:.875rem}.submit-btn{padding:12px 24px;background-color:#a855f7;color:#fff;border:none;border-radius:8px;font-size:.875rem;font-weight:600;cursor:pointer;transition:background-color .2s;font-family:inherit}.submit-btn:hover:not(:disabled){background-color:#9333ea}.submit-btn:disabled{opacity:.6;cursor:not-allowed}.auth-footer{margin-top:24px;text-align:center}.toggle-btn{background:none;border:none;color:#a855f7;font-size:.875rem;cursor:pointer;padding:8px;font-family:inherit;transition:color .2s}.toggle-btn:hover:not(:disabled){color:#9333ea;text-decoration:underline}.toggle-btn:disabled{opacity:.6;cursor:not-allowed}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{width:100vw;height:100vh}