body{font-family:system-ui,sans-serif;margin:0;line-height:1.6;color:#222}
header,main{max-width:720px;margin:auto;padding:12px}
nav a{margin-right:10px}section{margin:24px 0}
textarea,input[type=text],#gbText{width:100%;box-sizing:border-box}
#gallery img,#gallery video{max-width:100%;margin:6px 0}
.qr{width:160px;height:160px;border:2px dashed #999;display:grid;place-items:center}
a:focus,button:focus,input:focus,textarea:focus{outline:3px solid #06c}
@media(max-width:480px){header,main{padding:8px}}