:root {
  color-scheme: light;
  --bg: #f4f6fa;
  --card: #ffffff;
  --line: #e3e8f0;
  --ink: #0e1a2b;
  --muted: #5b6b82;
  --soft: #eef2f8;
  --accent: #f5b83d;
  --accent-ink: #0e1a2b;
  --code-bg: #0e1a2b;
  --code-ink: #e6edf7;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0a1220;
    --card: #101c2e;
    --line: #1e2d45;
    --ink: #e6edf7;
    --muted: #93a3ba;
    --soft: #16243a;
    --code-bg: #060c16;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font:
    15px/1.5 system-ui,
    -apple-system,
    'Segoe UI',
    sans-serif;
}

main {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 16px 48px;
}

h1 {
  margin: 0 0 8px;
  font-size: 26px;
}

h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

h3 {
  margin: 0 0 8px;
  font-size: 14px;
}

p {
  margin: 0;
  color: var(--muted);
}

section {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
}

.group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.label {
  width: 100%;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

button {
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

label {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
}

ol {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

pre {
  margin: 0;
  padding: 12px 14px;
  overflow-x: auto;
  border-radius: 8px;
  background: var(--code-bg);
  color: var(--code-ink);
  font:
    12px/1.6 ui-monospace,
    'SFMono-Regular',
    Menlo,
    monospace;
}

code {
  font-family: ui-monospace, 'SFMono-Regular', Menlo, monospace;
}