:root {
  color-scheme: light dark;
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 2.5rem 1rem 4rem;
  background: #f3f4f6;
  color: #111;
}

main {
  max-width: 700px;
  margin: 0 auto;
  background: #fff;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.15);
  transition: transform 150ms ease, box-shadow 150ms ease;
}

main.highlighted {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px rgba(37, 99, 235, 0.25);
}

h1 {
  margin-top: 0;
  font-size: 2.25rem;
  color: #2563eb;
}

ul {
  padding-left: 1.25rem;
}

li {
  margin-bottom: 0.75rem;
}

footer {
  margin-top: 2rem;
  font-size: 0.85rem;
  color: #475569;
}

code {
  background: #f1f5f9;
  color: #0f172a;
  padding: 0.15rem 0.3rem;
  border-radius: 4px;
}

.actions {
  margin: 1.5rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

button {
  padding: 0.65rem 1.2rem;
  border-radius: 999px;
  border: none;
  background: #2563eb;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: background 120ms ease, transform 120ms ease;
}

button:hover {
  background: #1d4ed8;
}

button:active {
  transform: scale(0.98);
}