/* SheetSnap — matches the app's design system: IBM Plex, hairline rules, a
   near-neutral cool palette, and colour used for exactly two things. */
:root {
  --bg: #F8F9FB;
  --surface: #FFFFFF;
  --sunken: #F0F3F5;
  --ink: #14191E;
  --ink-2: #54585E;
  --ink-3: #878B8F;
  --rule: #DEE0E2;
  --rule-2: #C6C9CD;
  --accent: #2172C6;
  --accent-soft: #E3F2FF;
  --flag: #C66D00;
  --measure: 44rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0C0F12; --surface: #14171B; --sunken: #080A0D;
    --ink: #F2F3F5; --ink-2: #A5AAB0; --ink-3: #71767D;
    --rule: #272A2F; --rule-2: #3D4247;
    --accent: #60A8FA; --accent-soft: #17293D; --flag: #EEA743;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: "IBM Plex Sans KR", "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
.mono { font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace; }

.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 24px; }

header.site {
  border-bottom: 1px solid var(--rule);
  background: var(--surface);
  position: sticky; top: 0; z-index: 10;
}
header.site .wrap {
  display: flex; align-items: center; gap: 16px;
  height: 60px;
}
.brand {
  display: flex; align-items: center; gap: 9px;
  font-weight: 600; color: var(--ink); text-decoration: none;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  letter-spacing: 0.01em;
}
.brand svg { flex: none; }
nav.site { margin-left: auto; display: flex; gap: 18px; flex-wrap: wrap; }
nav.site a { color: var(--ink-2); text-decoration: none; font-size: 14px; }
nav.site a:hover, nav.site a[aria-current] { color: var(--accent); }

main { padding: 44px 0 72px; }
h1 { font-size: clamp(28px, 5vw, 40px); line-height: 1.2; letter-spacing: -0.02em; color: var(--ink); margin: 0 0 8px; text-wrap: balance; }
h2 { font-size: 20px; line-height: 1.35; color: var(--ink); margin: 40px 0 10px; letter-spacing: -0.01em; }
h3 { font-size: 16px; color: var(--ink); margin: 26px 0 6px; }
p { margin: 0 0 14px; text-wrap: pretty; }
ul, ol { margin: 0 0 14px; padding-left: 20px; }
li { margin-bottom: 6px; }
a { color: var(--accent); }
a:hover { text-decoration: none; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 36px 0; }
code { font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 0.9em;
       background: var(--sunken); padding: 1px 5px; border-radius: 4px; }
strong { color: var(--ink); font-weight: 600; }

.lede { font-size: 18px; color: var(--ink-2); margin-bottom: 26px; }
.updated { font-size: 13px; color: var(--ink-3); margin-bottom: 30px; }

.card {
  background: var(--surface); border: 1px solid var(--rule);
  border-radius: 12px; padding: 20px 22px; margin: 0 0 14px;
}
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.pill {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 13px; color: var(--ink-2);
  background: var(--surface); border: 1px solid var(--rule-2);
  padding: 5px 12px; border-radius: 999px;
}
.pill .dot { width: 7px; height: 7px; border-radius: 4px; background: var(--accent); }

table { border-collapse: collapse; width: 100%; margin: 0 0 18px; font-size: 15px; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { color: var(--ink); font-weight: 600; background: var(--sunken); font-size: 13px; }
.scroll-x { overflow-x: auto; }

footer.site {
  border-top: 1px solid var(--rule); background: var(--surface);
  padding: 26px 0; font-size: 14px; color: var(--ink-3);
}
footer.site .wrap { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
footer.site a { color: var(--ink-2); text-decoration: none; }
footer.site a:hover { color: var(--accent); }
.spacer { margin-left: auto; }

.langswitch { font-size: 13px; margin-bottom: 24px; }
.langswitch a { color: var(--ink-3); text-decoration: none; }
.langswitch a[aria-current] { color: var(--ink); font-weight: 600; }

/* ── 제품 화면과 흐름 그림 ─────────────────────────────────────────────
   스크린샷은 실제 App Store 제출본(Store/screenshots/)에서 660px 폭 WebP 로
   줄인 것입니다. 언어별로 다른 파일을 씁니다 — 화면 안의 글자가 페이지
   언어와 어긋나면 안 되니까요. */

.flow {
  margin: 30px 0 34px;
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 14px;
}
.flow svg { display: block; width: 100%; height: auto; }

.shot {
  margin: 0;
  border: 1px solid var(--rule-2);
  border-radius: 20px;
  overflow: hidden;
  background: var(--sunken);
  box-shadow: 0 18px 40px -28px rgba(20, 25, 30, .45);
}
.shot img { display: block; width: 100%; height: auto; }
@media (prefers-color-scheme: dark) {
  .shot { box-shadow: 0 18px 40px -28px rgba(0, 0, 0, .8); }
}

/* 글과 화면을 나란히. 좁아지면 글이 먼저 오도록 쌓입니다. */
.split {
  display: grid;
  gap: 26px 34px;
  grid-template-columns: 1fr;
  align-items: center;
  margin: 26px 0 40px;
}
.split figcaption {
  font-size: 13.5px;
  color: var(--ink-3);
  margin-top: 10px;
  text-wrap: pretty;
}
.split .shot-col { max-width: 264px; }
@media (min-width: 40rem) {
  .split { grid-template-columns: 1fr 264px; }
  .split.flip { grid-template-columns: 264px 1fr; }
  .split.flip .text-col { order: 2; }
  .split.flip .shot-col { order: 1; }
}
.split h2 { margin-top: 0; }
.split p:last-child { margin-bottom: 0; }

/* 흐름 그림 안의 표 — 실제 앱 화면의 규칙을 따릅니다. */
.flow .rule { stroke: var(--rule-2); stroke-width: 1; }
.flow .fill-sunken { fill: var(--sunken); }
.flow .fill-surface { fill: var(--surface); }
.flow .ink { fill: var(--ink-3); }
.flow .ink-2 { fill: var(--rule-2); }
.flow .accent { fill: var(--accent); }
.flow .accent-stroke { stroke: var(--accent); stroke-width: 1.6; fill: none; }
.flow .flag-stroke { stroke: var(--flag); stroke-width: 2; fill: none; }
.flow .label {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 11px; fill: var(--ink-3);
}