:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --accent: #6b2ea9;
  --card-bg: #f5f5f5;
  --card-hover: #e8e0f0;
}

[data-theme="dark"] {
  --bg: #0f0f0f;
  --text: #e0e0e0;
  --accent: #a06cd5;
  --card-bg: #1a1a1a;
  --card-hover: #2a2035;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  transition: background 0.3s, color 0.3s;
}

#theme-toggle {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  background: var(--card-bg);
  border: none;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  cursor: pointer;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s;
}

#theme-toggle:hover {
  background: var(--card-hover);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--accent);
}

.links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
  max-width: 320px;
}

.links a {
  display: block;
  padding: 1rem 1.5rem;
  background: var(--card-bg);
  color: var(--text);
  text-decoration: none;
  border-radius: 12px;
  text-align: center;
  font-weight: 500;
  transition: background 0.3s, transform 0.2s;
}

.links a:hover {
  background: var(--card-hover);
  transform: translateY(-2px);
}