* {box-sizing:border-box;} html {scroll-behavior:smooth;} body {margin:0;color:var(--ink);background:var(--paper);font-family:var(--lura-font,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif);line-height:1.65;} a {color:inherit;} button,input,select,textarea {font:inherit;} img,video {max-width:100%;} .shell {width:var(--shell);margin-inline:auto;} .narrow-shell {max-width:880px;} h1,h2,h3 {margin:0;font-family:var(--lura-font);line-height:1.08;letter-spacing:-.035em;}