.install-app {
  position: fixed; z-index: 10010;
  left: 50%; bottom: max(16px, env(safe-area-inset-bottom));
  transform: translateX(-50%); box-sizing: border-box;
  width: min(460px, calc(100% - 24px)); max-height: calc(100dvh - 24px);
  overflow: auto; padding: 16px; border: 2px solid #ffd166; border-radius: 12px;
  background: #142b23; color: #f2f7f3;
  box-shadow: 0 8px 32px #0008; font: 16px/1.4 system-ui, sans-serif;
  touch-action: pan-y;
}
.install-app strong { font-size: 20px; }
.install-app p { margin: 6px 0 12px; color: #cee3dc; }
.install-actions { display: flex; gap: 10px; justify-content: flex-end; }
.install-app button {
  min-height: 44px; padding: 10px 18px; border: 1px solid #ffd166;
  border-radius: 8px; background: #ffd166; color: #142b23;
  font: 700 16px system-ui, sans-serif; cursor: pointer; touch-action: manipulation;
}
.install-app [data-install-close] { background: transparent; color: #f2f7f3; border-color: #78948b; }
.install-app button:focus-visible { outline: 3px solid #88e0d0; outline-offset: 3px; }
.install-app button:disabled { opacity: .6; cursor: wait; }
.install-app [hidden], [data-install-app][hidden] { display: none !important; }