body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(rgba(0,0,0,0.55), rgba(0,0,0,0.55)),
    linear-gradient(135deg, #1a1a2e, #16213e);
  background-size: cover;
}

.container {
  max-width: 480px;
  margin: 80px auto;
  padding: 28px;
  background: rgba(255,255,255,0.96);
  border-radius: 14px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.25);
  text-align: center;
}

h1 {
  font-size: 22px;
  margin-bottom: 24px;
}

.code-box {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 20px;
}

#refCode {
  font-size: 20px;
  font-weight: 600;
  padding: 10px 16px;
  background: #f1f3f5;
  border-radius: 8px;
}

button {
  padding: 10px 14px;
  font-size: 14px;
  border-radius: 6px;
  cursor: pointer;
  background: #111;
  color: #fff;
  border: 2px solid #000;
  box-shadow: 2px 2px 0 #000;
}

button:active {
  box-shadow: none;
  transform: translate(2px,2px);
}

.country {
  font-size: 14px;
  margin-bottom: 12px;
}

.note {
  font-size: 13px;
  color: #555;
}

.link {
  font-size: 12px;
  margin-top: 20px;
  word-break: break-all;
}