body {
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 50px;
  background-color: #ffffff;
  color: #222222;
  transition: background-color 0.3s, color 0.3s;
}

body.dark {
  background-color: #1a1a2e;
  color: #e0e0e0;
}

#theme-btn {
  position: fixed;
  top: 16px;
  right: 16px;
  padding: 8px 16px;
  border: 1px solid #ccc;
  border-radius: 20px;
  background-color: #f0f0f0;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

body.dark #theme-btn {
  background-color: #2a2a4a;
  color: #e0e0e0;
  border-color: #555;
}

#lotto-btn {
  padding: 10px 24px;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  background-color: #4a90d9;
  color: #fff;
  cursor: pointer;
  transition: background-color 0.3s;
}

#lotto-btn:hover {
  background-color: #357abd;
}

#lotto-numbers {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

#lotto-numbers span {
  display: inline-block;
  width: 40px;
  height: 40px;
  line-height: 40px;
  border-radius: 50%;
  background-color: #f0f0f0;
  color: #222;
  text-align: center;
  font-size: 1.2rem;
  transition: background-color 0.3s, color 0.3s;
}

body.dark #lotto-numbers span {
  background-color: #2a2a4a;
  color: #e0e0e0;
}