.install-button{border:1px solid #657575;border-radius:10px;padding:10px 14px;background:#fff;color:#142121;font:inherit;cursor:pointer;min-height:44px}.install-help{position:fixed;z-index:100;bottom:max(16px,env(safe-area-inset-bottom));left:16px;right:16px;max-width:560px;margin:auto;padding:20px;border:1px solid #8a9999;border-radius:16px;background:#fff;color:#142121;box-shadow:0 12px 48px #0004;line-height:1.6}.install-help[hidden]{display:none}.install-help button{min-height:44px;padding:8px 20px;border-radius:8px;border:1px solid #667;background:#142121;color:#fff;font:inherit}body{padding-bottom:env(safe-area-inset-bottom)}