:root {
  --bg: #fbfbfd; --fg: #1d1d1f; --muted: #6e6e73; --line: #e5e5ea;
  --card: #ffffff; --accent: #0a66d8; --code: #f2f2f5; --shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d0f; --fg: #f5f5f7; --muted: #a1a1a6; --line: #2c2c30;
    --card: #17171a; --accent: #4c9bff; --code: #222226; --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Apple SD Gothic Neo", "Helvetica Neue", sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 920px; margin: 0 auto; padding: 0 20px; }
header { display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; justify-content: space-between; padding: 22px 0; }
.brand { font-weight: 700; letter-spacing: -.01em; font-size: 19px; color: var(--fg); }
.brand span { color: var(--accent); }
.brand img { width: 24px; height: 24px; vertical-align: -5px; margin-right: 7px; }
.nav { display: flex; gap: 18px; align-items: center; font-size: 15px; }
.lang button {
  font: inherit; font-size: 14px; background: none; border: 1px solid var(--line); color: var(--muted);
  padding: 3px 10px; border-radius: 999px; cursor: pointer;
}
.lang button[aria-pressed="true"] { color: var(--fg); border-color: var(--fg); }
.hero { padding: 64px 0 40px; }
.hero h1 { font-size: clamp(34px, 6vw, 54px); line-height: 1.08; letter-spacing: -.025em; margin: 0 0 16px; }
.hero p { font-size: 20px; color: var(--muted); margin: 0; }
.hero .line { display: block; text-wrap: balance; }
.nb { white-space: nowrap; }
p { text-wrap: pretty; }
html[lang="ko"] body { word-break: keep-all; }
.apps { display: grid; gap: 20px; padding: 24px 0 72px; }
.app {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 28px; align-items: center;
  background: var(--card); border: 1px solid var(--line); border-radius: 22px; padding: 32px; box-shadow: var(--shadow);
}
.app > div { min-width: 0; }
.app-head { display: flex; gap: 16px; align-items: center; margin-bottom: 14px; }
.app-head img { width: 64px; height: 64px; border-radius: 15px; }
.app h2 { margin: 0; font-size: 28px; letter-spacing: -.015em; }
.tag { font-size: 13px; color: var(--muted); }
.app p { margin: 0 0 18px; }
.install {
  display: flex; align-items: center; gap: 8px; background: var(--code); border-radius: 10px;
  padding: 10px 10px 10px 14px; font: 14px/1.4 ui-monospace, "SF Mono", Menlo, monospace;
}
.install code { flex: 1; min-width: 0; }
.install button {
  font: 13px -apple-system, sans-serif; border: 1px solid var(--line); background: var(--card); color: var(--fg);
  border-radius: 7px; padding: 4px 10px; cursor: pointer; flex: none;
}
.links { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 16px; font-size: 15px; }
.shot img { width: 100%; height: auto; border-radius: 12px; display: block; }
.soon { text-align: center; color: var(--muted); border: 1px dashed var(--line); border-radius: 22px; padding: 28px; }
footer { border-top: 1px solid var(--line); padding: 28px 0 48px; color: var(--muted); font-size: 14px; }
/* Language switch: hide the other language; everything else keeps its own display. */
html:not([lang="ko"]) [data-ko], html[lang="ko"] [data-en] { display: none !important; }
@media (max-width: 720px) {
  .app { grid-template-columns: minmax(0, 1fr); padding: 22px; }
  .wrap { padding: 0 16px; }
  .nav { gap: 12px; }
  .hero p { font-size: 18px; }
  .hero { padding: 36px 0 24px; }
}

/* App pages (/<app>/) and manuals (/<app>/manual/) */
.crumbs { font-size: 15px; color: var(--muted); }
.crumbs a { color: var(--muted); }
.app-hero { padding: 40px 0 28px; display: flex; gap: 24px; align-items: center; }
.app-hero img { width: 112px; height: 112px; flex: none; }
.app-hero h1 { font-size: clamp(32px, 5vw, 46px); line-height: 1.1; letter-spacing: -.02em; margin: 0 0 6px; }
.app-hero p { margin: 0; font-size: 20px; color: var(--muted); }
.cta { display: grid; gap: 14px; max-width: 560px; margin: 0 0 40px; }
.cta > *, .doc > *, .split > * { min-width: 0; }
.cta .links { margin-top: 0; }
.demo video, .demo img { width: 100%; height: auto; display: block; border-radius: 16px; border: 1px solid var(--line); background: var(--card); }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; padding: 40px 0; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 22px; }
.feature h3 { margin: 0 0 6px; font-size: 18px; }
.feature p { margin: 0; color: var(--muted); font-size: 16px; }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; align-items: center; padding: 24px 0; }
.split h2, .section h2 { font-size: 28px; letter-spacing: -.015em; margin: 0 0 10px; }
.split img { width: 100%; height: auto; border-radius: 12px; display: block; }
.section { padding: 24px 0 48px; }
.btn { display: inline-block; background: var(--accent); color: #fff; border-radius: 999px; padding: 9px 20px; font-weight: 600; }
.btn:hover { text-decoration: none; filter: brightness(1.08); }

.doc { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 48px; padding: 24px 0 64px; }
.toc { position: sticky; top: 20px; align-self: start; font-size: 14px; max-height: calc(100vh - 40px); overflow: auto; }
.toc ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 7px; }
.toc a { color: var(--muted); }
.toc a:hover { color: var(--fg); }
.doc article h1 { font-size: clamp(30px, 5vw, 40px); letter-spacing: -.02em; margin: 0 0 16px; }
.doc article h2 { font-size: 24px; letter-spacing: -.01em; margin: 44px 0 12px; padding-top: 8px; scroll-margin-top: 16px; }
.doc article p, .doc article li { max-width: 68ch; }
.doc article img, .doc article video { max-width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--line); display: block; margin: 16px 0; }
.doc pre { background: var(--code); border-radius: 10px; padding: 12px 14px; overflow-x: auto; font: 14px/1.5 ui-monospace, "SF Mono", Menlo, monospace; }
.doc :not(pre) > code { background: var(--code); border-radius: 5px; padding: 1px 5px; font: .88em ui-monospace, "SF Mono", Menlo, monospace; }
.doc table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 12px 0; display: block; overflow-x: auto; }
.doc th, .doc td { border-bottom: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
.doc th { font-weight: 600; }
@media (max-width: 720px) {
  .app-hero { flex-direction: column; align-items: flex-start; gap: 14px; padding: 24px 0 20px; }
  .app-hero img { width: 84px; height: 84px; }
  .split { grid-template-columns: minmax(0, 1fr); }
  .doc { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .toc { position: static; max-height: none; border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; margin-bottom: 8px; }
}