#install-app { position: fixed; z-index: 100; top: calc(24px + env(safe-area-inset-top)); right: 78px; border: 1px solid #cfded4; border-radius: 24px; padding: 10px 14px; background: #eaf2ed; color: #28624d; font: 600 13px system-ui, sans-serif; cursor: pointer; }
#install-app[hidden] { display: none; }
#install-help { z-index: 101; box-sizing: border-box; width: min(380px, calc(100% - 40px)); border: 1px solid #e1e8e3; border-radius: 24px; padding: 28px; color: #172b25; background: #fff; font: 15px/1.6 system-ui, sans-serif; }
#install-help::backdrop { background: #10251bb3; }
#install-help img { border-radius: 14px; }
#install-help h2 { margin: 12px 0; font-size: 22px; }
#install-help .install-note { color: #728079; font-size: 13px; }
#install-help button { width: 100%; border: 0; border-radius: 14px; padding: 14px; background: #28624d; color: #fff; font: 600 15px system-ui, sans-serif; cursor: pointer; }