:root {
  --background-color-light: #f0f0f0;
  --text-color-light: #333;
  --card-bg-color-light: #fff;
  --button-bg-color-light: #4CAF50;
  --button-text-color-light: white;
  --number-bg-color-light: #eee;

  --background-color-dark: #333;
  --text-color-dark: #f0f0f0;
  --card-bg-color-dark: #444;
  --button-bg-color-dark: #5cb85c;
  --button-text-color-dark: white;
  --number-bg-color-dark: #555;
}

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

body.dark {
  background-color: var(--background-color-dark);
  color: var(--text-color-dark);
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 500px;
  padding: 0 20px;
  margin-bottom: 20px;
}

#dark-mode-toggle {
  background-color: var(--button-bg-color-light);
  color: var(--button-text-color-light);
  padding: 10px 15px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

body.dark #dark-mode-toggle {
  background-color: var(--button-bg-color-dark);
  color: var(--button-text-color-dark);
}

#weather {
  background-color: var(--card-bg-color-light);
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  text-align: center;
  margin-bottom: 20px;
  width: 100%;
  max-width: 460px;
}

body.dark #weather {
  background-color: var(--card-bg-color-dark);
}

#lotto-machine {
  background-color: var(--card-bg-color-light);
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: background-color 0.3s;
}

body.dark #lotto-machine {
  background-color: var(--card-bg-color-dark);
}

#lotto-btn {
  background-color: var(--button-bg-color-light);
  color: var(--button-text-color-light);
  padding: 15px 20px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
  margin-bottom: 20px;
}

body.dark #lotto-btn {
  background-color: var(--button-bg-color-dark);
  color: var(--button-text-color-dark);
}

#lotto-numbers {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lotto-number-set {
  display: flex;
  margin-bottom: 10px;
}

.lotto-number {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--number-bg-color-light);
  color: #333;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: bold;
  margin: 5px;
  transition: background-color 0.3s;
}

body.dark .lotto-number {
  background-color: var(--number-bg-color-dark);
  color: #f0f0f0;
}

.lotto-number.yellow { background-color: #f1c40f; }
.lotto-number.blue { background-color: #3498db; }
.lotto-number.red { background-color: #e74c3c; }
.lotto-number.gray { background-color: #95a5a6; }
.lotto-number.green { background-color: #2ecc71; }