* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem;
  color: #1a1a1a;
}

h1 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.intro {
  color: #555;
  margin-bottom: 2rem;
}

.tool-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.tool-card {
  display: block;
  padding: 1rem 1.25rem;
  background: #f5f5f5;
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  transition: background 0.15s;
}

.tool-card:hover {
  background: #eee;
}