:root {
  font-family: Arial, Helvetica, sans-serif;
  color-scheme: light;
  background: #ffffff;
  color: #333333;
}
* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; }
body {
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
main { flex: 1 1 auto; min-height: 0; }
iframe { display: block; width: 100%; height: 100%; border: 0; }
footer {
  flex: 0 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 2px 10px;
  min-height: 40px;
  padding: 7px 14px calc(7px + env(safe-area-inset-bottom, 0px));
  background: #fafafa;
  border-top: 1px solid #e5e5e5;
  font-size: 12px;
  line-height: 1.6;
  text-align: center;
}
a { color: #1a1a1a; font-weight: 600; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; }
@media (max-width: 420px) {
  footer { font-size: 11px; padding-inline: 8px; }
}