.sidebar{width:var(--sidebar-width);flex-shrink:0;background:var(--color-sidebar-bg);border-right:1px solid var(--color-border);padding:var(--space-6) var(--space-4);overflow-y:auto;display:flex;flex-direction:column;gap:var(--space-1)}.sidebar-section-label{padding:var(--space-6) var(--space-5) var(--space-3);font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.09em;color:var(--color-text-muted)}.sidebar-item{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-3) var(--space-5);border-radius:var(--radius-md);text-decoration:none;color:var(--color-text-subtle);font-size:.83rem;transition:background .12s,color .12s}.sidebar-item:hover{background:var(--color-sidebar-hover);color:var(--color-text-bright)}.sidebar-item--active{background:var(--color-sidebar-active);color:var(--color-on-sidebar-active);font-weight:600}.sidebar-item--active:hover{background:var(--color-sidebar-active-hover);color:var(--color-on-sidebar-active)}.sidebar-item-icon{display:flex;align-items:center;flex-shrink:0}.sidebar-item-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sidebar-item-number{font-family:monospace;font-size:.7rem;opacity:.65;flex-shrink:0}.sidebar-empty{padding:var(--space-3) var(--space-5);font-size:.78rem;line-height:1.5;color:var(--color-text-muted)}.sidebar-skeletons{display:flex;flex-direction:column;gap:var(--space-3);padding:var(--space-3) var(--space-5)}.sidebar-skeleton{height:14px;border-radius:var(--radius-sm);background:rgba(var(--ink-rgb),.07);animation:sidebar-pulse 1.4s ease-in-out infinite}.sidebar-skeleton:nth-child(2){width:80%}.sidebar-skeleton:nth-child(3){width:60%}@keyframes sidebar-pulse{0%,to{opacity:1}50%{opacity:.45}}.help-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:var(--space-8)}.help-backdrop{position:absolute;top:0;right:0;bottom:0;left:0;background:rgba(var(--ink-rgb),.4)}.help-panel{position:relative;width:min(600px,100%);max-height:100%;display:flex;flex-direction:column;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);overflow:hidden}.help-header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-5);padding:var(--space-6) var(--space-7);border-bottom:1px solid 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BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--space-1: 2px;--space-2: 4px;--space-3: 6px;--space-4: 8px;--space-5: 12px;--space-6: 16px;--space-7: 20px;--space-8: 24px;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .08);--shadow-md: 0 4px 16px rgba(0, 0, 0, .12);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .18);--color-error: #c0392b;--color-error-bg: rgba(224, 82, 82, .12);--color-error-border: rgba(224, 82, 82, .25);--color-danger: #d4503e;--color-warning: #c2820a;--color-success: #2f8f3a;--color-accent: #2563eb;--color-accent-soft: rgba(80, 120, 255, .16);background-color:var(--color-bg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--color-text)}[data-theme=dark]{color-scheme:dark;--ink-rgb: 226, 232, 240;--paper-rgb: 32, 35, 42;--color-bg: #16181d;--color-surface: #20232a;--color-surface-raised: #282c34;--color-surface-alt: #262a31;--color-surface-hover: #2e333c;--color-border: #363b45;--color-border-subtle: #4a505c;--color-primary: #7b83e8;--color-primary-hover: #969df0;--color-primary-rgb: 123, 131, 232;--color-text: #cfd3da;--color-text-bright: #f0f2f5;--color-text-subtle: #a6acb6;--color-text-muted: #828a95;--color-sidebar-bg: #1a1d23;--color-sidebar-hover: #262a32;--color-error: #e57368;--color-error-bg: rgba(224, 82, 82, .16);--color-error-border: rgba(224, 82, 82, .4);--color-danger: #e0685a;--color-warning: #dfa63c;--color-success: #4cae57;--color-accent: #5b8def;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 16px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .5)}body{min-height:100vh;overflow:hidden}#root{width:100%;height:100vh;display:flex;flex-direction:column}button{cursor:pointer;font-family:inherit}a{color:inherit}.app-loading{height:100vh;display:flex;align-items:center;justify-content:center;color:var(--color-text-subtle);font-size:14px;background:var(--color-bg)}.btn-primary{padding:10px 16px;border:none;border-radius:var(--radius-md);background:var(--color-primary);color:rgba(var(--paper-rgb),1);font-size:.88rem;font-weight:600;transition:background .15s}[data-theme=dark] .btn-primary{color:var(--color-bg)}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover)}.btn-primary:disabled{opacity:.55;cursor:default}.link-btn{background:none;border:none;padding:0;font:inherit;font-size:.82rem;color:var(--color-accent);text-decoration:underline}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.empty-note{color:var(--color-text-muted);font-size:.85rem;line-height:1.6}