:root {
  --bg-color: #ffffff;
  --text-color: #121212;
  --container-bg: #f0f0f0;
  --accent-color: #1e88e5;
  --accent-hover: #1565c0;
  --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
  --bg-color: #121212;
  --text-color: #ffffff;
  --container-bg: #333333;
  --accent-color: #1e88e5;
  --accent-hover: #1565c0;
  --shadow-color: rgba(0, 0, 0, 0.5);
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
  transition: background-color 0.3s, color 0.3s;
}

h1 {
  margin-bottom: 2rem;
}

.lotto-numbers-container {
  display: flex;
  margin-bottom: 2rem;
}

.lotto-number {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--container-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 0.5rem;
  font-size: 1.5rem;
  font-weight: bold;
  box-shadow: 0 4px 6px var(--shadow-color);
  transition: background-color 0.3s;
}

#generate-btn {
  padding: 0.8rem 1.5rem;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  background-color: var(--accent-color);
  color: #ffffff;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.2s;
  box-shadow: 0 4px 6px var(--shadow-color);
}

#generate-btn:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
}

#generate-btn:active {
  transform: translateY(0);
}

#theme-toggle {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent-color);
  border-radius: 20px;
  background: transparent;
  color: var(--accent-color);
  cursor: pointer;
  font-weight: bold;
  transition: all 0.3s;
}

#theme-toggle:hover {
  background-color: var(--accent-color);
  color: #ffffff;
}