:root{--color-primary:#1976d2;--color-primary-light:#42a5f5;--color-primary-dark:#1565c0;--color-primary-bg:#e3f2fd;--color-secondary:#ff9800;--color-secondary-light:#ffb74d;--color-secondary-dark:#f57c00;--color-success:#4caf50;--color-success-light:#81c784;--color-success-dark:#388e3c;--color-error:#f44336;--color-error-light:#ef5350;--color-error-dark:#d32f2f;--color-warning:#ff9800;--color-warning-light:#ffb74d;--color-warning-dark:#f57c00;--color-info:#2196f3;--color-info-light:#64b5f6;--color-info-dark:#1976d2;--color-background:#f8f9fa;--color-background-paper:#fff;--color-background-default:#f8f9fa;--color-text-primary:#202124;--color-text-secondary:#5f6368;--color-text-disabled:#9aa0a6;--color-border:#e1e5e9;--color-border-light:#f1f3f4;--color-border-dark:#dadce0;--color-grey-50:#fafafa;--color-grey-100:#f8f9fa;--color-grey-200:#f1f3f4;--color-grey-300:#e1e5e9;--color-grey-400:#dadce0;--color-grey-500:#5f6368;--color-grey-600:#3c4043;--color-grey-700:#202124;--color-grey-800:#1a1a1a;--color-grey-900:#000;--color-status-linked:var(--color-success);--color-status-unlinked:var(--color-warning);--color-status-error:var(--color-error);--color-status-processing:var(--color-info);--spacing-xs:4px;--spacing-sm:8px;--spacing-md:16px;--spacing-lg:24px;--spacing-xl:32px;--spacing-xxl:48px;--font-family-primary:"Segoe UI","Roboto",-apple-system,BlinkMacSystemFont,sans-serif;--font-family-monospace:"SF Mono",Monaco,"Cascadia Code","Roboto Mono",Consolas,"Courier New",monospace;--font-size-xs:12px;--font-size-sm:14px;--font-size-base:16px;--font-size-lg:18px;--font-size-xl:20px;--font-size-xxl:24px;--font-size-xxxl:32px;--font-weight-light:300;--font-weight-normal:400;--font-weight-medium:500;--font-weight-semibold:600;--font-weight-bold:700;--line-height-tight:1.2;--line-height-normal:1.5;--line-height-relaxed:1.6;--border-radius-sm:4px;--border-radius-md:6px;--border-radius-lg:8px;--border-radius-xl:12px;--shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow-md:0 1px 3px rgba(0,0,0,.1);--shadow-lg:0 4px 6px rgba(0,0,0,.1);--shadow-xl:0 10px 15px rgba(0,0,0,.1);--z-index-dropdown:1000;--z-index-sticky:1020;--z-index-fixed:1030;--z-index-modal-backdrop:1040;--z-index-modal:1050;--z-index-popover:1060;--z-index-tooltip:1070;--transition-fast:0.15s ease;--transition-normal:0.2s ease;--transition-slow:0.3s ease;--sidebar-width:240px;--header-height:64px;--footer-height:72px;--content-max-width:1400px;--input-height:40px;--input-padding-horizontal:12px;--input-padding-vertical:10px;--button-height:36px;--button-padding-horizontal:16px;--button-padding-vertical:8px;--table-row-height:48px;--table-header-height:56px;--grid-gap:var(--spacing-md);--grid-col-study-width:80px;--grid-col-intersection-width:180px;--grid-col-scenario-width:140px;--grid-col-peak-hour-width:100px;--grid-col-flag-width:1fr;--grid-col-action-width:150px;--grid-col-chevron-width:40px;--qaqc-grid-template:var(--grid-col-study-width) var(--grid-col-intersection-width) var(--grid-col-scenario-width) var(--grid-col-peak-hour-width) var(--grid-col-flag-width) var(--grid-col-action-width) var(--grid-col-chevron-width);--qaqc-reasoning-left-offset:calc(var(--grid-col-study-width) + var(--grid-col-intersection-width) + var(--grid-col-scenario-width) + var(--grid-col-peak-hour-width) + var(--spacing-xs) * 4 + var(--spacing-lg));--qaqc-reasoning-right-offset:calc(var(--grid-col-chevron-width) + var(--spacing-lg));--hover-opacity:0.04;--active-opacity:0.08;--disabled-opacity:0.6;--focus-ring-width:2px;--focus-ring-color:var(--color-primary);--focus-ring-offset:2px}*,:after,:before{box-sizing:border-box}*{margin:0;padding:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-family-primary);font-size:var(--font-size-base);line-height:var(--line-height-normal);color:var(--color-text-primary);background-color:var(--color-background);overflow-x:hidden;text-rendering:optimizeLegibility;transform:translateZ(0)}button{border:none;background:none;font-family:inherit;cursor:pointer}input,select,textarea{font-family:inherit;font-size:inherit}a{color:inherit;text-decoration:none}ol,ul{list-style:none}canvas,img,picture,svg,video{display:block;max-width:100%;height:auto}table{border-collapse:collapse;border-spacing:0}fieldset{border:none;padding:0;margin:0}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--color-grey-100);border-radius:var(--border-radius-sm)}::-webkit-scrollbar-thumb{background:var(--color-grey-400);border-radius:var(--border-radius-sm)}::-webkit-scrollbar-thumb:hover{background:var(--color-grey-500)}