html{font-size:16px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";line-height:1.15;-webkit-text-size-adjust:100%}body{margin:0;font-size:1rem;line-height:1.5;color:#333;background-color:#fff}
h1 { font-size: 2.5em; line-height: 1.4; font-weight: bold; }
h2 { font-size: 2em; line-height: 1.35; font-weight: bold; }
h3 { font-size: 1.5em; line-height: 1.3; font-weight: bold; }
h4 { font-size: 1.25em; line-height: 1.4; font-weight: 600; }
h5 { font-size: 1.125em; line-height: 1.4; font-weight: 600; }