:root {
  --bg-color: #ffffff;
  --text-color: #333333;
  --button-bg: #eeeeee;
  --button-text: #333333;
  --accent-color: #007bff;
}

body.dark-mode {
  --bg-color: #1a1a1a;
  --text-color: #f0f0f0;
  --button-bg: #333333;
  --button-text: #f0f0f0;
}

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

.theme-container {
  position: absolute;
  top: 20px;
  right: 20px;
}

.content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

button {
  padding: 10px 20px;
  cursor: pointer;
  background-color: var(--button-bg);
  color: var(--button-text);
  border: 1px solid #ccc;
  border-radius: 5px;
  font-size: 1rem;
  transition: all 0.2s;
}

button:hover {
  opacity: 0.8;
}

#original-btn {
  margin-top: 20px;
  background-color: var(--accent-color);
  color: white;
  border: none;
}