:root {
  color-scheme: light;
  --bg: #f5f5f7;
  --panel: rgba(255, 255, 255, 0.78);
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(0, 0, 0, 0.1);
  --code: rgba(0, 0, 0, 0.035);
  --code-border: rgba(0, 0, 0, 0.08);
  --accent: #0071e3;
  --max: 780px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.9), rgba(245, 245, 247, 0) 420px),
    linear-gradient(180deg, #fbfbfd 0%, var(--bg) 360px, #fff 100%);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
  line-height: 1.62;
  letter-spacing: 0;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.site {
  min-height: 100vh;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  width: min(980px, calc(100vw - 36px));
  margin: 0 auto;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
  font-size: 13px;
}

.nav a {
  color: var(--muted);
}

.nav a:hover {
  color: var(--ink);
  text-decoration: none;
}

.article {
  width: min(var(--max), calc(100vw - 36px));
  margin: 0 auto;
  padding: 72px 0 88px;
}

h1,
h2 {
  margin: 0;
  color: var(--ink);
  font-weight: 650;
  letter-spacing: -0.02em;
}

h1 {
  max-width: 900px;
  margin-bottom: 20px;
  font-size: clamp(42px, 8vw, 78px);
  line-height: 0.98;
}

h2 {
  margin-top: 72px;
  padding-top: 8px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.08;
}

p {
  margin: 18px 0;
}

.repo-link {
  margin: 0 0 34px;
}

.repo-link a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 15px;
  color: var(--accent);
  background: rgba(0, 113, 227, 0.08);
  border: 1px solid rgba(0, 113, 227, 0.16);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
}

.repo-link a:hover {
  background: rgba(0, 113, 227, 0.12);
  text-decoration: none;
}

section {
  margin-top: 0;
}

ul {
  margin: 18px 0;
  padding-left: 24px;
}

li {
  margin: 8px 0;
}

code,
pre {
  font-family: "SF Mono", SFMono-Regular, ui-monospace, Menlo, Monaco, Consolas, monospace;
}

code {
  padding: 0.08em 0.24em;
  background: var(--code);
  border-radius: 6px;
  font-size: 0.88em;
}

pre {
  margin: 24px 0;
  padding: 18px 20px;
  overflow-x: auto;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--code-border);
  border-radius: 18px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.06);
  font-size: 13px;
  line-height: 1.55;
}

pre code {
  padding: 0;
  background: transparent;
  border-radius: 0;
  font-size: inherit;
}

@media (max-width: 640px) {
  body {
    font-size: 17px;
  }

  .article {
    padding-top: 48px;
  }

  h1 {
    margin-bottom: 28px;
  }

  h2 {
    margin-top: 58px;
  }
}