:root {
  --bg-color: #ffffff;
  --text-color: #222222;
  --number-bg: #f0f0f0;
  --number-text: #222222;
  --btn-bg: #ffffff;
  --btn-text: #222222;
  --btn-border: #cccccc;
}

[data-theme="dark"] {
  --bg-color: #1a1a2e;
  --text-color: #e0e0e0;
  --number-bg: #16213e;
  --number-text: #e0e0e0;
  --btn-bg: #16213e;
  --btn-text: #e0e0e0;
  --btn-border: #444466;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
  font-family: sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
}

.lotto-numbers-container {
  display: flex;
  margin-bottom: 20px;
}

.lotto-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--number-bg);
  color: var(--number-text);
  margin: 0 5px;
  font-size: 20px;
  font-weight: bold;
  transition: background-color 0.3s, color 0.3s;
}

#generate-btn {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  background-color: var(--btn-bg);
  color: var(--btn-text);
  border: 1px solid var(--btn-border);
  border-radius: 6px;
  transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

#theme-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  width: 42px;
  height: 42px;
  font-size: 20px;
  cursor: pointer;
  background-color: var(--btn-bg);
  color: var(--btn-text);
  border: 1px solid var(--btn-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.3s, border-color 0.3s;
}