:root{--br-color-canvas:#f7f7f5;--br-color-surface:#fff;--br-color-text:#191919;--br-color-text-muted:#5f6368;--br-color-border:#d8dadc;--br-color-accent:#2f5f5b;--br-color-accent-contrast:#fff;--br-color-info-surface:#eef5f4;--br-color-warning-surface:#fff7e6;--br-color-danger-surface:#fff0f0;--br-font-family-sans:Arial, "Noto Sans Arabic", system-ui, sans-serif;--br-font-size-sm:.875rem;--br-font-size-md:1rem;--br-font-size-lg:1.25rem;--br-font-size-xl:clamp(1.75rem, 4vw, 3rem);--br-space-1:.25rem;--br-space-2:.5rem;--br-space-3:.75rem;--br-space-4:1rem;--br-space-6:1.5rem;--br-space-8:2rem;--br-space-12:3rem;--br-radius-sm:.375rem;--br-radius-md:.75rem;--br-radius-lg:1rem;--br-shadow-raised:0 .5rem 1.5rem #00000014;--br-content-max:72rem;--br-breakpoint-narrow:48rem}
*{box-sizing:border-box}html{background:var(--br-color-canvas)}body{min-height:100vh;color:var(--br-color-text);background:var(--br-color-canvas);font-family:var(--br-font-family-sans);margin:0;line-height:1.6}a{color:inherit}a:focus-visible,button:focus-visible,summary:focus-visible{outline:.2rem solid var(--br-color-accent);outline-offset:.2rem}main{width:min(100% - 2rem, var(--br-content-max));padding-block:var(--br-space-8);margin-inline:auto}.ltr-proof{text-align:start;direction:ltr}@media (max-width:48rem){main{width:min(100% - 1rem, var(--br-content-max));padding-block:var(--br-space-4)}}