* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #111;
  color: #f2f2f2;
  font-family: system-ui, sans-serif;
  text-align: center;
}

.card {
  padding: 2rem 3rem;
  max-width: 90vw;
}

body.tv h1 {
  font-size: 2.5rem;
}

body.phone h1 {
  font-size: 1.6rem;
}

.qr {
  width: min(60vw, 360px);
  height: auto;
  background: #fff;
  padding: 1rem;
  border-radius: 12px;
}

.hint {
  opacity: 0.7;
  word-break: break-all;
}

input[type="file"] {
  display: block;
  margin: 1.5rem auto;
  color: inherit;
}

button, .download-btn {
  font-size: 1.1rem;
  padding: 0.8rem 1.6rem;
  border-radius: 8px;
  border: none;
  background: #2d7dff;
  color: #fff;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

button:hover, .download-btn:hover {
  background: #1a63d6;
}

@media (prefers-color-scheme: light) {
  body { background: #f5f5f5; color: #111; }
}