:root{--sidebar-width:48px;--sidebar-panel-width:340px;--sidebar-item-size:32px;--sidebar-padding:6px;--sidebar-gap:4px;--sidebar-secondary-width:240px;--sidebar-left-offset:8px}.sidebar-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.3);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);z-index:calc(var(--z-sidebar) - 2);opacity:0;pointer-events:none;transition:opacity .25s ease}.sidebar-backdrop.visible{opacity:1;pointer-events:auto}.floating-nav-island{position:fixed;left:var(--sidebar-left-offset);top:50%;transform:translateY(-50%);background:var(--surface-secondary-solid);border-radius:var(--radius-panel);box-shadow:var(--shadow-panel);z-index:var(--z-sidebar);display:flex;flex-direction:row;transition:transform var(--duration-normal) var(--ease-default);user-select:none;overflow:visible}.floating-nav-island.dragging-over{transform:translateY(-50%) scale(1.02)}.nav-panel{position:relative;min-width:0}.nav-panel,.nav-panel.main-panel{display:flex;flex-direction:column}.nav-panel.main-panel{padding:var(--sidebar-padding);gap:var(--sidebar-gap);overflow:visible}.nav-panel .panel-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px 8px;flex-shrink:0}.panel-title{font-size:var(--text-xs);font-weight:var(--font-medium);margin:0;text-transform:uppercase;letter-spacing:.05em}.panel-close,.panel-title{color:var(--text-tertiary)}.panel-close{width:24px;height:24px;border-radius:var(--radius-default);background:transparent;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--duration-fast) var(--ease-default)}.panel-close:hover{background:var(--surface-tertiary);color:var(--text-primary)}.panel-close svg{width:16px;height:16px}.panel-content{flex:1;overflow:hidden;min-height:0}.nav-section,.panel-content{display:flex;flex-direction:column}.nav-section{gap:var(--sidebar-gap);overflow:visible}.nav-section.primary{flex:1}.nav-section.bottom{margin-top:auto}.nav-item{width:var(--sidebar-item-size);height:var(--sidebar-item-size);border-radius:var(--radius-default);background:transparent;border:none;color:var(--icon-default);cursor:pointer;padding:0;transition:background-color var(--duration-fast) var(--ease-default),color var(--duration-fast) var(--ease-default),border-radius var(--duration-fast) var(--ease-default)}.nav-icon,.nav-item{position:relative;display:flex;align-items:center;justify-content:center}.nav-icon,.nav-icon svg{width:18px;height:18px}.nav-item:hover:not(.active):not(.primary){background:var(--surface-tertiary);color:var(--icon-hover);border-radius:50%}.nav-item.active{background:var(--accent-subtle);color:var(--accent-primary);border-radius:50%}.nav-item.active:hover{background:var(--status-error-bg);color:var(--status-error)}.nav-item.primary{background:var(--accent-primary);color:#fff;border-radius:50%;margin-bottom:4px}.nav-item.primary:hover{background:var(--accent-hover);transform:scale(1.05)}.nav-item.primary:active{transform:scale(.95)}.nav-item.primary svg{color:#fff}.nav-item.disabled{opacity:.4;cursor:not-allowed}.nav-item.disabled:hover{background:transparent}.nav-item:focus-visible{outline:2px solid var(--accent-primary);outline-offset:2px}.nav-icon-with-badge{position:relative;width:18px;height:18px}.nav-icon-badge,.nav-icon-with-badge{display:flex;align-items:center;justify-content:center}.nav-icon-badge{position:absolute;top:-4px;right:-4px;width:16px;height:16px;background:#e01e5a;border-radius:50%;color:#fff;font-size:var(--text-3xs);font-weight:600}.sidebar-tooltip{position:absolute;left:calc(100% + 10px);font-size:var(--text-2xs);font-weight:var(--font-medium);white-space:nowrap;padding:5px 10px;background:var(--surface-elevated);color:var(--text-primary);border-radius:var(--radius-sm);box-shadow:var(--shadow-panel);pointer-events:none;z-index:var(--z-tooltip);animation:tooltipIn var(--duration-fast) var(--ease-out)}@keyframes tooltipIn{0%{opacity:0;transform:translateY(-50%) translateX(-4px)}to{opacity:1;transform:translateY(-50%) translateX(0)}}.history-search-container{padding:8px 16px 12px}.history-search-wrapper{display:flex;align-items:center;gap:8px;padding:0 12px;height:36px;background:var(--surface-tertiary);border:none;border-radius:var(--radius-pill);transition:background-color var(--duration-fast) var(--ease-default)}.history-search-wrapper:focus-within{background:var(--surface-hover)}.history-search-icon{width:14px;height:14px;color:var(--icon-default);opacity:.6;flex-shrink:0}.history-search-input{flex:1;background:transparent;border:none;font-size:var(--text-sm);color:var(--text-primary);outline:none;padding:0;min-width:0}.history-search-input::placeholder{color:var(--text-tertiary)}.history-search-clear{width:20px;height:20px;background:transparent;border:none;color:var(--icon-default);opacity:.6;cursor:pointer;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:all var(--duration-fast) var(--ease-default)}.history-search-clear:hover{background:var(--surface-elevated);color:var(--icon-hover);opacity:1}.history-search-clear svg{width:12px;height:12px}.history-list{flex:1;overflow-y:auto;padding:8px 12px 12px}.history-item{width:100%;padding:10px 12px;margin-bottom:2px;background:transparent;border:none;border-radius:var(--radius-lg);color:var(--text-secondary);cursor:pointer;text-align:left;position:relative;transition:background-color var(--duration-fast) var(--ease-default)}.history-item:hover{background:hsla(0,0%,100%,.04)}.history-item.active{background:hsla(0,0%,100%,.06)}.history-item.active .history-text{color:#6fb8ff}.history-item.loading{pointer-events:none;opacity:.7}.history-item-content{display:flex;flex-direction:column;gap:2px}.history-text{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:var(--text-xs);font-weight:500;line-height:1.4;color:var(--text-primary)}.history-date{font-size:var(--text-2xs);color:var(--text-detail-subline)}.history-item-progress{position:absolute;top:0;left:0;right:0;height:2px;border-radius:var(--radius-default) var(--radius-default) 0 0;overflow:hidden}.history-preview{font-size:var(--text-xs);color:var(--text-tertiary);margin-top:4px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.similarity-score{margin-left:8px;font-size:var(--text-3xs);color:var(--accent-primary);font-weight:var(--font-medium)}.search-highlight{background-color:var(--search-highlight-bg);color:var(--search-highlight-text);padding:0 2px;border-radius:2px}.clear-search-btn{margin-top:8px;padding:6px 12px;background:var(--surface-tertiary);border:none;border-radius:var(--radius-lg);color:var(--text-primary);font-size:var(--text-xs);cursor:pointer;transition:background-color var(--duration-fast) var(--ease-default)}.clear-search-btn:hover{background:var(--surface-elevated)}.history-loading-more{gap:8px;padding:16px;font-size:var(--text-sm)}.history-loading-more,.panel-empty,.panel-loading{display:flex;align-items:center;justify-content:center;color:var(--text-tertiary)}.panel-empty,.panel-loading{flex:1;flex-direction:column;gap:12px;padding:32px 16px;text-align:center}.panel-empty svg{width:28px;height:28px;opacity:.5}.panel-empty-hint{font-size:var(--text-xs);color:var(--text-tertiary);margin-top:4px}.loading-spinner{width:20px;height:20px;border:2px solid var(--border-default);border-top-color:var(--accent-primary);border-radius:50%;animation:spin .8s linear infinite}.loading-spinner.small{width:14px;height:14px;position:absolute;right:16px;top:50%;transform:translateY(-50%)}@keyframes 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16px;font-size:var(--text-sm);font-weight:var(--font-medium);color:#fff;background:var(--status-error);border:none;border-radius:var(--radius-pill);cursor:pointer;width:100%;transition:opacity var(--duration-fast) var(--ease-default)}.profile-action:hover{opacity:.9}.panel-form{gap:12px}.panel-form,.panel-form-field{display:flex;flex-direction:column}.panel-form-field{gap:4px}.panel-form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.panel-form-label{font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--text-primary)}.panel-form-label .required{color:var(--status-error)}.panel-form-input,.panel-form-select,.panel-form-textarea{width:100%;padding:8px 12px;font-size:var(--text-sm);background:var(--surface-tertiary);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);color:var(--text-primary);transition:border-color var(--duration-fast) var(--ease-default)}.panel-form-input:focus,.panel-form-select:focus,.panel-form-textarea:focus{outline:none;border-color:var(--accent-primary)}.panel-form-textarea{resize:vertical;min-height:60px}.panel-submit-btn{margin-top:8px;padding:10px 20px;font-size:var(--text-sm);font-weight:var(--font-semibold,600);color:#fff;background:var(--accent-primary);border:none;border-radius:var(--radius-pill);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background-color var(--duration-fast) var(--ease-default)}.panel-submit-btn:hover:not(:disabled){background:var(--accent-hover)}.panel-submit-btn:disabled{opacity:.5;cursor:not-allowed}.artifact-drop-zone{border:2px dashed var(--accent-primary);border-radius:var(--radius-lg);padding:12px;text-align:center;background:var(--accent-subtle);min-height:80px;display:flex;align-items:center;justify-content:center;flex-direction:column;transition:all var(--duration-fast) var(--ease-default)}.artifact-drop-zone.dragging{background:var(--accent-medium)}.drop-zone-text{font-size:var(--text-sm);color:var(--accent-primary)}.attached-artifacts{width:100%;display:flex;flex-direction:column;gap:4px;padding-top:8px}.artifacts-label{font-size:var(--text-3xs);color:var(--accent-primary);text-transform:uppercase;letter-spacing:.05em;text-align:center;font-weight:var(--font-semibold)}.artifact-drop-zone .artifact-list{display:flex;flex-direction:column;gap:4px;max-height:100px;overflow-y:auto;margin-top:4px}.artifact-drop-zone .artifact-item{padding:6px 10px;background:var(--surface-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:space-between;gap:8px;animation:artifactIn var(--duration-normal) var(--ease-out) forwards;opacity:0}@keyframes artifactIn{to{opacity:1}}.artifact-drop-zone .artifact-title{font-size:var(--text-xs);color:var(--text-primary);flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.artifact-remove{background:none;border:none;color:var(--text-tertiary);cursor:pointer;padding:2px;width:18px;height:18px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);opacity:0;transition:all var(--duration-fast) var(--ease-default)}.artifact-drop-zone .artifact-item:hover .artifact-remove{opacity:.6}.artifact-remove:hover{background:var(--status-error-bg);color:var(--status-error);opacity:1!important}.help-panel-tabs{display:flex;gap:4px;padding:0 12px;margin-bottom:8px;border-bottom:1px solid var(--border-subtle)}.help-tab{padding:8px 12px;background:transparent;border:none;border-bottom:2px solid transparent;color:var(--text-tertiary);font-size:var(--text-sm);font-weight:var(--font-medium);cursor:pointer;margin-bottom:-1px;transition:all var(--duration-fast) var(--ease-default)}.help-tab:hover:not(.active){color:var(--text-primary);background:var(--surface-tertiary)}.help-tab.active{color:var(--accent-primary);border-bottom-color:var(--accent-primary)}.schedule-meeting-content{display:flex;flex-direction:column;gap:12px;padding:8px}.schedule-description{font-size:var(--text-sm);color:var(--text-tertiary);line-height:1.45;text-align:center}.meeting-options{display:flex;flex-direction:column;gap:8px}.meeting-option-btn{display:flex;align-items:center;padding:12px;background:var(--surface-tertiary);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);cursor:pointer;text-align:left;width:100%;transition:all var(--duration-fast) var(--ease-default)}.meeting-option-btn:hover{background:var(--surface-elevated);border-color:var(--accent-primary)}.meeting-option-btn.primary{background:var(--accent-subtle);border-color:var(--accent-primary)}.meeting-option-content{display:flex;flex-direction:column;gap:2px}.meeting-option-title{font-size:var(--text-sm);font-weight:var(--font-semibold);color:var(--text-primary)}.meeting-option-subtitle{font-size:var(--text-xs);color:var(--text-tertiary)}.schedule-footer{padding-top:12px;border-top:1px solid var(--border-subtle);margin-top:auto}.schedule-note{font-size:var(--text-xs);color:var(--text-tertiary);text-align:center}.mobile-nav-fab{position:fixed;bottom:24px;right:24px;width:56px;height:56px;background:var(--accent-primary);border-radius:var(--radius-lg);border:none;box-shadow:var(--shadow-panel);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:var(--z-elevated);transition:transform var(--duration-normal) var(--ease-default)}.mobile-nav-fab:active{transform:scale(.95)}.mobile-nav-fab svg{width:28px;height:28px}.mobile-nav-overlay{position:fixed;inset:0;background:var(--modal-backdrop);z-index:var(--z-overlay-backdrop);animation:fadeIn var(--duration-normal) var(--ease-default)}.mobile-radial-menu{position:absolute;bottom:80px;right:80px;width:200px;height:200px;pointer-events:none}.mobile-nav-close{transform:translate(-50%,-50%);width:48px;height:48px;color:var(--text-primary)}.mobile-nav-close,.mobile-radial-item{position:absolute;top:50%;left:50%;background:var(--surface-secondary);border-radius:50%;border:1px solid var(--border-subtle);box-shadow:var(--shadow-panel);display:flex;align-items:center;justify-content:center;cursor:pointer;pointer-events:auto}.mobile-radial-item{width:56px;height:56px;margin:-28px 0 0 -28px;color:var(--text-tertiary);flex-direction:column;gap:4px;animation:radialIn var(--duration-normal) var(--ease-out) backwards}.mobile-radial-item:nth-child(2){animation-delay:50ms}.mobile-radial-item:nth-child(3){animation-delay:.1s}.mobile-radial-item:nth-child(4){animation-delay:.15s}.mobile-radial-item:nth-child(5){animation-delay:.2s}@keyframes radialIn{0%{opacity:0;transform:translate(0) scale(.5)}to{opacity:1;transform:var(--transform) scale(1)}}.mobile-radial-item.active{background:var(--accent-subtle);color:var(--accent-primary);border-color:var(--accent-primary)}.mobile-radial-item svg{width:24px;height:24px}.mobile-item-label{font-size:var(--text-3xs);font-weight:var(--font-medium);text-align:center}@media (max-width:768px){.floating-nav-island{left:4px;top:12px;transform:none}}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.01ms!important;transition-duration:.01ms!important}}@media (forced-colors:active){.nav-item{border:1px solid ButtonText;background:ButtonFace;color:ButtonText}.nav-item.active,.nav-item.primary,.nav-item:hover{background:Highlight;color:HighlightText}.nav-item.primary{border:2px solid HighlightText}}.theme-light .nav-icon-badge{box-shadow:0 1px 4px rgba(37,124,255,.25)}.theme-light .history-item:hover{background:rgba(0,0,0,.03)}.theme-light .history-item.active{background:rgba(0,0,0,.05)}.theme-light .history-item.active .history-text{color:#2b7fd4}.files-container .file-icon.has-thumbnail{width:32px;height:32px;overflow:hidden;border-radius:var(--radius-xs);background:var(--surface-tertiary)}.files-container .file-thumbnail{width:100%;height:100%;object-fit:cover}.nav-item.has-notification .nav-icon{position:relative}.nav-item.has-notification .nav-icon:after{content:"";position:absolute;top:2px;right:2px;width:6px;height:6px;border-radius:50%;background:var(--status-warning)}.side-panel{--side-panel-width:280px;position:fixed;top:0;bottom:0;left:0;width:calc(var(--side-panel-width) + var(--safe-area-left));background:var(--surface-secondary-solid);box-shadow:var(--shadow-panel);border-radius:0 var(--radius-xl) var(--radius-xl) 0;z-index:calc(var(--z-sidebar) - 1);display:flex;flex-direction:column;overflow:hidden;transform:translateX(-100%);transition:transform .25s cubic-bezier(.4,0,.2,1);pointer-events:none}.side-panel.visible{transform:translateX(0);pointer-events:auto}.side-panel__back{display:flex;align-items:center;justify-content:center;width:28px;height:28px;margin:16px 16px 8px var(--safe-area-left);padding:0;border-radius:var(--radius-sm);background:transparent;border:none;color:var(--text-tertiary);cursor:pointer;transition:all .15s ease;flex-shrink:0}.side-panel__back:hover{background:var(--surface-hover);color:var(--text-primary)}.side-panel__back svg{width:20px;height:20px}.side-panel__title{font-size:var(--text-lg);font-weight:600;color:var(--text-primary);margin:0 16px 12px var(--safe-area-left);flex-shrink:0}.side-panel__content{flex:1;overflow-y:auto;overflow-x:hidden;padding:0 16px 24px var(--safe-area-left)}