:root {
  --bg: #f5f7fa;
  --text: #1f2937;
  --muted: #4b5563;
  --card: #ffffff;
  --border: #e5e7eb;
  --link: #0f766e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(1.7rem, 1.1rem + 2vw, 2.3rem);
}

h2 {
  margin-top: 28px;
  margin-bottom: 10px;
  font-size: 1.2rem;
}

p,
li {
  line-height: 1.6;
  color: var(--muted);
}

small {
  color: var(--muted);
}

article {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
}

a {
  color: var(--link);
}

nav {
  margin-bottom: 18px;
}

nav a {
  margin-right: 14px;
}

.home {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  text-align: center;
}

.home h1 {
  font-size: clamp(2rem, 1.4rem + 2vw, 2.8rem);
}