:root{--color-bg: #fafafa;--color-text: #1a1a1a;--color-text-secondary: #555;--color-accent: #2563eb;--color-card-bg: #ffffff;--color-border: #e5e5e5;--font-sans: "Inter", system-ui, -apple-system, sans-serif;--max-width: 720px;--spacing-section: 5rem}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-sans);font-size:1rem;line-height:1.6;color:var(--color-text);background-color:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.container{max-width:var(--max-width);margin:0 auto;padding:0 1.5rem}