:root{--stm-container:1200px;--stm-gutter:16px}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;line-height:1.5;color:#111}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}.stm-container{max-width:var(--stm-container);margin:0 auto;padding:0 var(--stm-gutter)}