.site-header .install-app {display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;min-width:38px;padding:7px;border:0;background:transparent;color:inherit;box-shadow:none;cursor:pointer}
.site-header .install-app[hidden] {display:none}
.install-app img {display:block;width:24px;height:24px;object-fit:contain}
html[data-theme="light"] .install-app img {filter:brightness(0)}
.install-help {width:min(90vw,390px);box-sizing:border-box;padding:24px;border:1px solid #9c75b7;border-radius:18px;background:#140e22;color:#fff}
.install-help::backdrop {background:#0009}
.install-help h2 {margin-top:0;font-size:1.3rem}
.install-help p {line-height:1.6}
.install-help [data-install-close] {display:block;margin-inline-start:auto}