:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #1b1f24;
  --muted: #4d5661;
  --border: #d9dee5;
  --link: #0d4ea3;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 700px;
  margin: 0 auto;
  padding: 32px 20px 40px;
}

.section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 18px;
}

h1,
h2,
h3 {
  margin: 0 0 12px;
  line-height: 1.25;
}

h1 {
  font-size: clamp(2rem, 6vw, 2.4rem);
}

h2 {
  font-size: clamp(1.5rem, 4.2vw, 1.8rem);
}

h3 {
  font-size: 1.1rem;
  margin-top: 24px;
}

p {
  margin: 0 0 14px;
}

.subtitle {
  font-size: 1.05rem;
  color: var(--muted);
}

.quick-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  padding-top: 4px;
}

a {
  color: var(--link);
  text-underline-offset: 2px;
}

ul {
  margin: 0 0 14px;
  padding-left: 22px;
}

ol {
  margin: 0 0 14px;
  padding-left: 22px;
}

.footer p {
  margin: 0;
}

@media (max-width: 480px) {
  .container {
    padding: 20px 14px 28px;
  }

  .section {
    padding: 18px;
  }
}