:root {
  --bg: #ffffff;
  --fg: #1b1f24;
  --muted: #57606a;
  --line: #d0d7de;
  --panel: #f6f8fa;
  --accent: #0b5cad;
  --warn-bg: #fff8e1;
  --warn-line: #e3b341;
  --bad: #b42318;
  --ok: #1a7f37;
  --code-bg: #0d1117;
  --code-fg: #e6edf3;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #9198a1;
    --line: #30363d;
    --panel: #161b22;
    --accent: #58a6ff;
    --warn-bg: #2b2311;
    --warn-line: #9e6a03;
    --bad: #f85149;
    --ok: #3fb950;
    --code-bg: #010409;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", "Hiragino Sans", "Noto Sans CJK KR", sans-serif;
  word-break: keep-all;
  overflow-wrap: anywhere;
}
main, header, footer { max-width: 860px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 24px; }
nav.lang { font-size: 14px; color: var(--muted); }
nav.lang a, nav.lang strong { margin-right: 10px; }
a { color: var(--accent); }
h1 { font-size: 1.9rem; line-height: 1.3; margin: 18px 0 8px; }
h2 { font-size: 1.35rem; margin: 40px 0 10px; padding-top: 8px; border-top: 1px solid var(--line); }
h3 { font-size: 1.1rem; margin: 24px 0 8px; }
.lead { font-size: 1.1rem; color: var(--muted); margin-top: 0; }
.badges span {
  display: inline-block; font-size: 13px; padding: 2px 10px; margin: 0 6px 6px 0;
  border: 1px solid var(--line); border-radius: 999px; background: var(--panel);
}
.warn { background: var(--warn-bg); border-left: 4px solid var(--warn-line); padding: 10px 14px; margin: 18px 0; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 16px; margin: 16px 0; }
table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 10px 0; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; vertical-align: top; }
th { background: var(--panel); }
/* Latin monospace fonts first: CJK fallback fonts render "\" as ¥ or ₩. */
pre, code { font-family: Consolas, "Cascadia Mono", Menlo, "SF Mono", "DejaVu Sans Mono", ui-monospace, monospace; }
code { font-size: 0.92em; }
pre {
  background: var(--code-bg); color: var(--code-fg); padding: 14px; border-radius: 6px;
  overflow-x: auto; font-size: 13.5px; line-height: 1.5; margin: 0;
}
.codebox { position: relative; margin: 8px 0 16px; }
.codebox button.copy {
  position: absolute; top: 6px; right: 6px; font-size: 12px; padding: 3px 8px;
  border: 1px solid #444c56; border-radius: 4px; background: #21262d; color: #e6edf3; cursor: pointer;
}
label { font-weight: 600; display: block; margin-bottom: 6px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; }
input[type=url] {
  flex: 1 1 260px; min-width: 0; font: inherit; padding: 8px 10px;
  border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--fg);
}
button.primary {
  font: inherit; padding: 8px 16px; border: 0; border-radius: 6px;
  background: var(--accent); color: #fff; cursor: pointer;
}
.check { font-weight: 400; display: flex; gap: 8px; align-items: flex-start; margin-top: 10px; }
.check input { margin-top: 6px; }
.error { color: var(--bad); font-weight: 600; min-height: 1.4em; margin: 8px 0 0; }
.tabs { display: flex; gap: 4px; margin-top: 12px; flex-wrap: wrap; }
.tabs button {
  font: inherit; font-size: 14px; padding: 4px 12px; border: 1px solid var(--line);
  border-radius: 6px 6px 0 0; background: var(--panel); color: var(--fg); cursor: pointer;
}
.tabs button[aria-selected=true] { background: var(--accent); color: #fff; border-color: var(--accent); }
.note { font-size: 14px; color: var(--muted); }
.bad { color: var(--bad); font-weight: 600; }
.ok { color: var(--ok); font-weight: 600; }
details { border: 1px solid var(--line); border-radius: 6px; padding: 8px 12px; margin: 8px 0; }
summary { cursor: pointer; font-weight: 600; }
footer { margin-top: 48px; padding-bottom: 40px; font-size: 14px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 16px; }
figure { margin: 16px 0 20px; }
figure img { display: block; max-width: 100%; height: auto; border: 1px solid var(--line); border-radius: 6px; }
figcaption { font-size: 14px; color: var(--muted); margin-top: 6px; }
main.article h3 { font-size: 1.25rem; margin-top: 32px; }