/* reset */
*{box-sizing: border-box;}
html,body{padding: 0; margin: 0;}
span{display: inline-block;}
img{max-width: 100%;}
summary{cursor: pointer;}
a{text-decoration: none; color: inherit;}
/* typo */
h1,h2,h3,h4,h5,h6,p{padding: 0; margin: 0; font: inherit;}
/* h1{font-size: 2em;}
h2{font-size: 1.6em;}
h3{font-size: 1.2em;}
h4{font-size: 1em;}
h5{font-size: 1em;}
h6{font-size: 1em;}
p{font-size: 1em;} */