:root {
  --bg-color: #ffffff;
  --text-color: #333333;
  --button-bg: #f0f0f0;
  --button-text: #333333;
  --transition-speed: 0.3s;
}

[data-theme="dark"] {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --button-bg: #2d2d2d;
  --button-text: #ffffff;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color var(--transition-speed), color var(--transition-speed);
  font-family: 'Inter', -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;
  text-align: center;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

p {
  font-size: 1.1rem;
  opacity: 0.8;
}

button {
  background-color: var(--button-bg);
  color: var(--button-text);
  border: 1px solid rgba(0,0,0,0.1);
  padding: 12px 24px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition-speed) ease;
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

[data-theme="dark"] button {
  border-color: rgba(255,255,255,0.1);
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0,0,0,0.1);
  opacity: 0.9;
}

button:active {
  transform: translateY(0);
}

.theme-toggle {
  position: absolute;
  top: 2rem;
  right: 2rem;
}