:root{font-family:arial,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol;font-size:.9rem;line-height:2}body,body *{color:#444;margin:0;padding:0}button::-moz-focus-inner{border:0;padding:0}input[type=submit]::-moz-focus-inner{border:0;padding:0}input,button{font-size:inherit}html{scroll-behavior:smooth;background:#eee}body{box-sizing:border-box;background:#fff;width:100%;max-width:1024px;min-height:100vh;margin:0 auto;padding:1em}body *+*{margin-top:.9em}label{display:block}input{background:#fff;border:1px solid #444;padding:.1em}button{color:#fff;background:#444;border:0;border-radius:.2em;padding:.2em .5em}@media screen and (width>=800px){body{padding:2em}}nav{background:#fff;justify-content:space-between;gap:1em;display:flex;position:sticky;top:0}nav img{height:3rem}nav ul{align-items:center;margin-top:0;list-style:none;display:flex}nav ul li{cursor:pointer;margin:0}nav ul{flex-grow:1;justify-content:space-between}nav .unread:after{content:"・";color:#f44040;font-size:2em;line-height:.5}.date-pagination{align-items:center;margin-top:0;list-style:none;display:flex}.date-pagination li{cursor:pointer;margin:0}.date-pagination{flex-wrap:wrap}.date-pagination li{margin-inline-start:1em;list-style:inside}.date-pagination,h2,.message+.message{border-top:1px solid #ccc;margin-top:2rem;padding-top:2rem}.delete{color:#fff;cursor:pointer;float:right;background:#400;border:0}.delete+h3{margin-top:0}img,video{max-width:100%;display:block}.thread{background:#ccc}.thread .message{margin-left:2em}footer{justify-content:space-between;align-items:center;display:flex}footer .refresh{margin-top:0}.refresh{color:#fff;cursor:pointer;background:#444;border:0}section .refresh{float:right;margin-top:calc(4rem + 1px)}