:root {
  --bg: #ffffff;
  --bg-soft: #f6f7fb;
  --fg: #16171d;
  --muted: #5d6170;
  --line: #e4e6ee;
  --accent: #4f5bd5;
  --accent-strong: #3b45b8;
  --accent-soft: #eceefe;
  --card: #ffffff;
  --code-bg: #f3f4f8;
  --shadow: 0 1px 2px rgba(20, 22, 40, .06), 0 8px 24px rgba(20, 22, 40, .08);
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1015;
    --bg-soft: #15161d;
    --fg: #ececf2;
    --muted: #a0a4b3;
    --line: #262833;
    --accent: #8b95ff;
    --accent-strong: #a9b0ff;
    --accent-soft: #1d2040;
    --card: #17181f;
    --code-bg: #1b1c24;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 Inter, system-ui, -apple-system, "Segoe UI", "Malgun Gothic", "Apple SD Gothic Neo", "Noto Sans KR",
    "Hiragino Sans", "Yu Gothic UI", Meiryo, "Noto Sans JP", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); }

/* header and footer */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-row { display: flex; align-items: center; gap: 8px 24px; min-height: 60px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 800; font-size: 18px; letter-spacing: -.01em; }
.brand:hover { text-decoration: none; }
.site-nav { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 15px; }
.site-nav a, .languages a { color: var(--muted); }
.site-nav a[aria-current], .languages a[aria-current] { color: var(--fg); font-weight: 600; }
.languages { margin-left: auto; display: flex; gap: 12px; font-size: 14px; }
.site-footer { border-top: 1px solid var(--line); margin-top: 72px; padding: 28px 0; font-size: 14px; color: var(--muted); }
.footer-row { display: flex; flex-wrap: wrap; gap: 8px 28px; align-items: center; }
.footer-links { display: flex; flex-wrap: wrap; gap: 4px 16px; }
.footer-links a { color: var(--muted); }

/* documentation pages */
.doc { max-width: 820px; padding-top: 32px; }
.doc h1 { font-size: 34px; line-height: 1.2; letter-spacing: -.02em; }
.doc h2 { margin-top: 44px; padding-top: 10px; border-top: 1px solid var(--line); letter-spacing: -.01em; }
.doc img { border-radius: 10px; box-shadow: var(--shadow); margin: 8px 0; }
code { background: var(--code-bg); padding: 1px 6px; border-radius: 5px; font-size: .9em; }
pre { background: var(--code-bg); padding: 14px 16px; border-radius: 10px; overflow-x: auto; border: 1px solid var(--line); }
pre code { padding: 0; background: none; }
table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; margin: 12px 0; }
th, td { border-bottom: 1px solid var(--line); padding: 8px 12px; text-align: left; vertical-align: top; }
th { font-weight: 600; background: var(--bg-soft); }
blockquote { margin: 16px 0; padding: 10px 16px; background: var(--accent-soft); border-left: 4px solid var(--accent); border-radius: 8px; }
.mermaid { margin: 20px 0; text-align: center; }

/* landing page */
.landing section { padding: 72px 0; }
.landing section.alt { background: var(--bg-soft); }
.landing h2 { font-size: 32px; line-height: 1.2; letter-spacing: -.02em; margin: 0 0 12px; }
.section-lead { color: var(--muted); font-size: 18px; max-width: 680px; margin: 0 0 36px; }

.hero { padding: 72px 0 40px; text-align: center; background:
  radial-gradient(1200px 400px at 50% -120px, color-mix(in srgb, var(--accent) 22%, transparent), transparent); }
.eyebrow { display: inline-block; padding: 4px 12px; border-radius: 999px; background: var(--accent-soft); color: var(--accent);
  font-size: 14px; font-weight: 600; margin-bottom: 18px; }
.eyebrow a { color: inherit; text-decoration: underline; text-underline-offset: .15em; }
.hero h1 { font-size: clamp(34px, 6vw, 58px); line-height: 1.08; letter-spacing: -.035em; margin: 0 auto 18px; max-width: 900px; }
.hero h1 .accent { color: var(--accent); }
.hero .lead { font-size: clamp(17px, 2.2vw, 20px); color: var(--muted); max-width: 720px; margin: 0 auto 30px; }
.buttons { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.button { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 10px; font-weight: 600;
  font-size: 16px; border: 1px solid var(--line); color: var(--fg); background: var(--card); }
.button:hover { text-decoration: none; border-color: var(--accent); }
.button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.button.primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.platforms { margin-top: 18px; font-size: 14px; color: var(--muted); }

.shot { margin: 48px auto 0; max-width: 1000px; border-radius: 14px; overflow: hidden; box-shadow: var(--shadow);
  border: 1px solid var(--line); background: #000; }
.shot .bar { display: flex; gap: 6px; padding: 10px 12px; background: #1d1e25; }
.shot .bar i { width: 11px; height: 11px; border-radius: 50%; background: #3a3b45; display: block; }
.shot img { display: block; width: 100%; }

.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 12px 0 6px; font-size: 18px; letter-spacing: -.01em; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.icon { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; background: var(--accent-soft);
  color: var(--accent); }
.icon svg { width: 22px; height: 22px; }

.split { display: grid; gap: 40px; grid-template-columns: 1fr 1fr; align-items: center; }
.split img { border-radius: 12px; box-shadow: var(--shadow); border: 1px solid var(--line); }
@media (max-width: 820px) { .split { grid-template-columns: 1fr; } }

.keys { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.keys li { display: flex; align-items: center; gap: 14px; }
.keys .combo { min-width: 150px; display: flex; gap: 6px; flex-wrap: wrap; }
kbd { display: inline-block; min-width: 30px; padding: 3px 9px; border-radius: 7px; border: 1px solid var(--line);
  border-bottom-width: 3px; background: var(--card); font: 600 14px/1.4 Inter, system-ui, sans-serif; text-align: center; }

.steps { counter-reset: step; }
.steps .card { position: relative; padding-top: 26px; }
.steps .card::before { counter-increment: step; content: counter(step); position: absolute; top: -14px; left: 22px;
  width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 700;
  display: grid; place-items: center; font-size: 15px; }
.note { margin-top: 22px; color: var(--muted); font-size: 15px; }

.translators .card .tag { display: inline-block; font-size: 12.5px; font-weight: 600; padding: 2px 9px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); }

.callout { display: flex; gap: 20px; align-items: flex-start; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px; }
.callout h3 { margin: 0 0 6px; font-size: 19px; }
.callout p { margin: 0; color: var(--muted); }
.callout .more { margin-top: 12px; font-weight: 600; }
.callout + .callout { margin-top: 16px; }
.callout .label { font-size: 13px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }

@media (max-width: 640px) {
  .site-header { position: static; }
  .landing section { padding: 52px 0; }
  .hero { padding-top: 44px; }
  .keys .combo { min-width: 120px; }
}

.chips { list-style: none; padding: 0; margin: 26px auto 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px;
  max-width: 820px; }
.chips li { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); font-size: 14px;
  font-weight: 500; }
.chips li::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  margin-right: 8px; vertical-align: 2px; }

/* Line breaks: balanced headings, no single word left on a paragraph's last line */
h1, h2, h3, .lead, .section-lead { text-wrap: balance; }
p, li { text-wrap: pretty; }

/* Korean: break lines between words, not inside them; Pretendard for Hangul */
:lang(ko) { word-break: keep-all; overflow-wrap: anywhere; }
body:lang(ko), :lang(ko) kbd { font-family: "Pretendard Variable", Pretendard, Inter, system-ui, "Malgun Gothic", "Apple SD Gothic Neo", sans-serif; }
:lang(ko) h1, :lang(ko) h2 { letter-spacing: -.025em; }
:lang(ko) .hero h1 { line-height: 1.18; }

/* Japanese: Noto Sans JP, a little more line height */
body:lang(ja), :lang(ja) kbd { font-family: Inter, "Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", Meiryo, system-ui, sans-serif; }
:lang(ja) h1, :lang(ja) h2 { letter-spacing: -.01em; }
:lang(ja) .hero h1 { line-height: 1.2; }
:lang(ja) p { line-height: 1.8; }