:root{--color-primary:#4572cb;--color-primary-light:#00a3ff;--color-primary-dark:#3458a8;--color-text:#1a1b1f;--color-text-body:#3c3c3c;--color-text-muted:#949494;--color-background:#fff;--color-surface:#f8f9fa;--color-border:#e5e7eb;--space-xs:0.25rem;--space-sm:0.5rem;--space-md:1rem;--space-lg:2rem;--space-xl:4rem;--space-2xl:6rem;--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--text-xs:0.75rem;--text-sm:0.875rem;--text-base:1rem;--text-lg:1.125rem;--text-xl:1.25rem;--text-2xl:1.5rem;--text-3xl:2rem;--text-4xl:2.5rem;--text-5xl:3rem;--container-max:1200px;--container-padding:1.5rem;--transition-fast:150ms ease;--transition-base:300ms ease;--shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow-md:0 4px 6px rgba(0,0,0,.07);--shadow-lg:0 10px 25px rgba(0,0,0,.1);--radius-sm:0.25rem;--radius-md:0.5rem;--radius-lg:1rem;--radius-full:9999px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-sans);font-size:var(--text-base);line-height:1.6;color:var(--color-text-body);background-color:var(--color-background);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{color:var(--color-text);line-height:1.2;font-weight:600}a{color:var(--color-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-primary-dark)}img{max-width:100%;height:auto;display:block}button{font-family:inherit;cursor:pointer}.container{max-width:var(--container-max);margin:0 auto;padding:0 var(--container-padding)}.section{padding:var(--space-2xl) 0}:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}::selection{background-color:var(--color-primary);color:#fff}