body {
  font-family: 'Helvetica Neue', sans-serif;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  background: linear-gradient(to right, #4facfe, #00f2fe);
  color: #fff;
  text-align: center;
  transition: filter 0.3s ease;
}

body.grayscale-mode {
  filter: grayscale(100%);
}

.lotto-container {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin: 20px 0;
}

.lotto-ball {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 10px;
  font-size: 2em;
  font-weight: bold;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.lotto-ball:hover {
  transform: scale(1.1);
}

button {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 15px 30px;
  font-size: 1.2em;
  border-radius: 25px;
  cursor: pointer;
  transition: background-color 0.3s ease;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  margin-top: 10px;
}

button:hover {
  background: rgba(255, 255, 255, 0.3);
}

h1 {
  font-size: 3em;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}