:root {
  --theme: #2747c7;
  --ground: #f4f6f8;
  --ink: #18232e;
  --soft: #5d6b78;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #e8edf2; --soft: #9aa8b5; --ground: #111820; color-scheme: dark; }
}
body {
  margin: 0;
  min-height: 100vh;
  box-sizing: border-box;
  padding: max(24px, env(safe-area-inset-top)) 16px max(24px, env(safe-area-inset-bottom));
  display: grid;
  grid-template-columns: minmax(0, 360px);
  justify-content: center;
  align-content: center;
  background: var(--ground);
  color: var(--ink);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { min-width: 0; text-align: center; }
h1 { font-size: 1.6rem; line-height: 1.2; margin: 16px 0 6px; }
p { color: var(--soft); margin: 0 0 16px; }
#icon { width: 112px; height: 112px; border-radius: 26px; }
#install-button, .open {
  display: block;
  width: 100%;
  box-sizing: border-box;
  border: 0;
  border-radius: 12px;
  padding: 14px;
  min-height: 48px;
  font: 600 1rem system-ui, -apple-system, sans-serif;
  text-decoration: none;
  cursor: pointer;
}
#install-button { background: var(--theme); color: #fff; }
.open { color: var(--theme); margin-top: 8px; }
ol { text-align: left; color: var(--soft); padding-left: 1.2em; margin: 0 0 12px; }
.source { font-size: 0.8rem; margin-top: 20px; word-break: break-all; }
[hidden] { display: none !important; }