body {
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  background-color: #f4f4f4;
  color: #333;
}

h1 {
  color: #0056b3;
  margin-bottom: 30px;
}

button {
  padding: 10px 20px;
  font-size: 1.2em;
  color: #fff;
  background-color: #007bff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s ease;
  margin-bottom: 20px;
}

button:hover {
  background-color: #0056b3;
}

#lotto-numbers {
  display: flex;
  gap: 15px;
  margin-top: 20px;
}

.lotto-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  color: white;
  font-size: 1.5em;
  font-weight: bold;
  box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.2);
}

.color-1 { background-color: #ffc107; } /* 1-10 */
.color-11 { background-color: #007bff; } /* 11-20 */
.color-21 { background-color: #dc3545; } /* 21-30 */
.color-31 { background-color: #6c757d; } /* 31-40 */
.color-41 { background-color: #28a745; } /* 41-45 */