/* one-by.one site: the same palette, type and wordmark as connect.one-by.one.
   Light: charcoal on light grey. Dark: light text with the icon's lime accent. */
:root {
  color-scheme: light dark;
  --text: #1a1c20;
  --muted: #5f6570;
  --line: #dadde2;
  --bg: #f3f4f5;
  --surface: #fff;
  --accent: #1a1c20;
  --focus: #1a1c20;
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Hiragino Sans", "Noto Sans KR", "Noto Sans JP", sans-serif;
  font-synthesis: none;
  color: var(--text);
  background: var(--bg);
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #f3f4f5;
    --muted: #9ba1aa;
    --line: #2e3137;
    --bg: #0e0f11;
    --surface: #1a1c20;
    --accent: #c6ef4e;
    --focus: #c6ef4e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  line-height: 1.65;
}

a { color: inherit; text-underline-offset: 4px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }

.shell { width: 100%; max-width: 1040px; margin: 0 auto; padding: 28px 40px; }

/* Header: the wordmark only, identical on every page. */
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.brand img { width: 30px; height: 30px; display: block; border-radius: 7px; }
.wordmark { font-size: 21px; font-weight: 700; letter-spacing: -.6px; line-height: 1; }

main { flex: 1; }

/* Documents */
.page { padding-top: 32px; padding-bottom: 72px; }
.document { max-width: 680px; }
.eyebrow { margin: 0 0 10px; color: var(--muted); font-size: 13px; font-weight: 600; }
h1 { margin: 0 0 12px; font-size: clamp(32px, 6vw, 44px); line-height: 1.12; letter-spacing: -1px; font-weight: 700; overflow-wrap: anywhere; }
h2 { margin: 40px 0 10px; font-size: 20px; line-height: 1.3; letter-spacing: -.3px; }
p, li { font-size: 16px; }
p { margin: 0 0 14px; }
ul { margin: 0 0 14px; padding-left: 1.25em; }
li + li { margin-top: 6px; }
.updated, .muted { color: var(--muted); font-size: 14px; }
.callout { margin: 22px 0; padding: 14px 16px; background: var(--surface); border-left: 3px solid var(--accent); border-radius: 0 12px 12px 0; }
.callout p { margin: 0; }

.link-list { display: grid; gap: 12px; margin-top: 28px; }
.link-card {
  display: grid;
  gap: 4px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  text-decoration: none;
  transition: transform .08s ease-out, border-color .12s ease-out;
}
.link-card span { color: var(--muted); font-size: 14px; }
.link-card:hover { border-color: var(--muted); }
.link-card:active { transform: scale(.985); border-color: var(--text); }

/* Product home */
.home { display: flex; flex-direction: column; justify-content: center; }
.home .mark { width: 88px; height: 88px; border-radius: 20px; margin-bottom: 28px; }
.home h1 { font-size: clamp(40px, 8vw, 64px); line-height: 1.05; letter-spacing: -2px; margin-bottom: 14px; }
.home .soon { color: var(--muted); font-size: 19px; margin: 0; }

/* Footer: legal and language links, identical on every page. */
.footer-inner {
  border-top: 1px solid var(--line);
  padding-top: 22px;
  color: var(--muted);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  gap: 12px 20px;
  flex-wrap: wrap;
}
.footer-inner nav { display: flex; gap: 8px 18px; flex-wrap: wrap; }
.footer-inner a { text-decoration: none; }
.footer-inner a:hover { text-decoration: underline; }
.footer-inner a[aria-current="page"] { color: var(--text); }

@media (max-width: 520px) {
  .shell { padding: 20px 16px; }
  .page { padding-top: 16px; }
}