/* ASR 랜딩 공용 스타일 — 2026-09-20 한 가지 색 톤으로 전면 교체.
   원칙(UI/UX 페블 검토 9/20): 짙은 녹색 하나를 농도로만 나눈다. 구분은 12% 선. 그림·색점·배경 띠 없음.
   글자에는 72% 농도가 하한(대비 4.9:1), 45% 이하는 선과 장식에만 쓴다. 제목은 리디바탕 400, 본문은 프리텐다드. */
:root {
  --paper: #faf9f6;
  --ink: #2f3a2c;
  --ink-strong: #1f271d;
  --ink-80: rgba(47, 58, 44, .8);
  --ink-72: rgba(47, 58, 44, .72);
  --ink-45: rgba(47, 58, 44, .45);
  --ink-12: rgba(47, 58, 44, .12);
  --ink-04: rgba(47, 58, 44, .04);
  --serif: "RIDIBatang", "Noto Serif KR", "AppleMyungjo", "Batang", serif;
  --sans: "Pretendard Variable", "Pretendard", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --gutter: 40px;
  --header-h: 72px;
  --section-gap: clamp(96px, 11vw, 160px);
}

@font-face {
  font-family: "RIDIBatang";
  src: url("fonts/RIDIBatang.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Pretendard Variable";
  src: url("fonts/PretendardVariable.woff2") format("woff2");
  font-style: normal;
  font-weight: 45 920;
  font-display: swap;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
[id] { scroll-margin-top: calc(var(--header-h) + 16px); }
body { margin: 0; overflow-x: hidden; background: var(--paper); color: var(--ink-80); font-family: var(--sans); font-size: 17px; line-height: 1.8; }
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--ink); outline-offset: 4px; }
p { margin: 0; }
code { font-family: var(--mono); font-size: .92em; }

.container { width: min(calc(100% - var(--gutter) * 2), 1240px); margin-inline: auto; }
.reading { max-width: 640px; }
.skip-link { position: fixed; z-index: 20; top: 12px; left: 12px; padding: 8px 12px; background: var(--ink); color: var(--paper); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

/* ---------- 제목·글자 ---------- */
h1, h2 { margin: 0; color: var(--ink); font-family: var(--serif); font-weight: 400; font-synthesis: none; letter-spacing: -.03em; word-break: keep-all; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
h1 { font-size: clamp(34px, 4.4vw, 60px); line-height: 1.25; }
h2 { font-size: clamp(28px, 2.8vw, 38px); line-height: 1.4; }
h3 { margin: 0 0 8px; color: var(--ink); font-size: 18px; font-weight: 600; line-height: 1.5; word-break: keep-all; }
.eyebrow, .label, .number { margin: 0; color: var(--ink-72); font-size: 12px; font-weight: 500; letter-spacing: .08em; }

/* ---------- 버튼·링크 ---------- */
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 12px 24px; border: 0; border-radius: 999px; background: var(--ink); color: var(--paper); font-size: 16px; font-weight: 600; line-height: 1.4; text-decoration: none; transition: background-color 160ms ease; }
.button:hover { background: var(--ink-strong); }
.text-link { color: var(--ink); font-size: 15px; font-weight: 500; text-decoration: underline; text-decoration-color: var(--ink-45); text-underline-offset: 5px; }
.text-link:hover { text-decoration-color: var(--ink); }

/* ---------- 머리·꼬리 ---------- */
.site-header { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; height: var(--header-h); background: var(--paper); }
.wordmark { color: var(--ink); font-family: var(--serif); font-size: 20px; letter-spacing: -.01em; text-decoration: none; }
.site-header nav { display: flex; align-items: center; gap: 28px; }
.site-header nav a { color: var(--ink-72); font-size: 13px; letter-spacing: .06em; text-decoration: none; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: var(--ink); }
.site-header nav .nav-start { color: var(--ink); font-weight: 600; }

.site-footer { border-top: 1px solid var(--ink-12); }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 36px; padding-block: 40px 48px; }
.footer-inner p { margin-top: 6px; color: var(--ink-72); font-size: 13px; }
.site-footer nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px 24px; max-width: 640px; }
.site-footer nav a { color: var(--ink-72); font-size: 13px; text-decoration: none; }
.site-footer nav a:hover, .site-footer nav a[aria-current="page"] { color: var(--ink); }
.footer-copy { margin-top: 24px; color: var(--ink-72); font-size: 12px; }

/* ---------- 메인 첫 화면 ---------- */
.hero { display: flex; flex-direction: column; min-height: calc(100vh - var(--header-h)); min-height: calc(100svh - var(--header-h)); }
.hero-lead { max-width: 640px; padding-top: clamp(40px, 9vh, 96px); }
.hero-lead h1 { font-size: clamp(30px, 3.4vw, 46px); line-height: 1.3; }
.hero-lead p { margin-top: 28px; color: var(--ink-80); font-size: clamp(15px, 1.15vw, 17px); line-height: 1.75; word-break: keep-all; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 16px 24px; margin-top: 40px; }
.hero-bottom { margin-top: auto; padding-top: 120px; }
.hero-down { display: block; margin-bottom: 8px; color: var(--ink-72); font-size: 13px; text-align: right; text-decoration: none; }
.hero-down:hover { color: var(--ink); }
.hero-big { margin: 0; padding-bottom: clamp(24px, 5vh, 56px); color: var(--ink); font-family: var(--serif); font-size: clamp(48px, min(9.4vw, 15vh), 135px); font-weight: 400; line-height: 1.05; letter-spacing: -.045em; white-space: nowrap; }

/* ---------- 메인 구획 ---------- */
.section { padding-block: var(--section-gap); border-top: 1px solid var(--ink-12); }
.section-heading { max-width: 640px; }
.section-heading h2 { margin-top: 14px; }
.section-heading > p:not(.eyebrow) { margin-top: 20px; color: var(--ink-80); }
.split { display: grid; grid-template-columns: minmax(260px, .85fr) minmax(0, 1.5fr); column-gap: 10%; align-items: start; }

.steps { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.steps li { display: grid; grid-template-columns: 36px 1fr; gap: 12px; padding-block: 22px; border-top: 1px solid var(--ink-12); }
.steps li:last-child { border-bottom: 1px solid var(--ink-12); }
.steps span { color: var(--ink-72); font-family: var(--mono); font-size: 13px; line-height: 1.9; }
.steps h3 { margin: 0 0 2px; font-size: 17px; }
.steps p { color: var(--ink-80); font-size: 15px; }

.snippet { margin-top: 32px; }
.snippet-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.snippet-head .label { font-family: var(--sans); }
.copy-button { padding: 4px 12px; border: 1px solid var(--ink-45); border-radius: 999px; background: transparent; color: var(--ink); font: 500 13px/1.6 var(--sans); cursor: pointer; }
.copy-button:hover { border-color: var(--ink); }
.snippet pre { margin: 10px 0 0; padding: 18px 20px; overflow-x: auto; background: var(--ink); color: var(--paper); font: 13px/1.7 var(--mono); white-space: pre; border-radius: 4px; }
.fine { margin-top: 20px; color: var(--ink-72); font-size: 14px; line-height: 1.75; }
.fine a { color: var(--ink); text-underline-offset: 4px; }

.tool-row { display: flex; flex-wrap: wrap; gap: 12px 40px; margin: 48px 0 0; padding: 28px 0; border-block: 1px solid var(--ink-12); list-style: none; }
.tool-row a { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); font-size: 16px; text-decoration: none; }
.tool-row a:hover span { text-decoration: underline; text-decoration-color: var(--ink-45); text-underline-offset: 5px; }
.tool-row img { width: 28px; height: 28px; object-fit: contain; filter: grayscale(1); opacity: .72; }

.principle-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; margin-top: 56px; }
.principle-grid article { padding-top: 18px; border-top: 1px solid var(--ink-12); }
.principle-grid h3 { margin-top: 28px; font-family: var(--serif); font-size: 24px; font-weight: 400; letter-spacing: -.02em; }
.principle-grid article > p:last-child { margin-top: 8px; color: var(--ink-80); font-size: 15px; line-height: 1.8; }

.more-line { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--ink-12); color: var(--ink-80); font-size: 15px; }

.closing { padding-block: var(--section-gap); border-top: 1px solid var(--ink-12); }
.closing h2 { font-size: clamp(34px, 4.4vw, 60px); line-height: 1.25; }
.closing p { max-width: 560px; margin-top: 20px; color: var(--ink-80); }
.closing .hero-actions { margin-top: 36px; }

/* ---------- 하위 페이지 공용 ---------- */
.detail-page { border-top: 1px solid var(--ink-12); }
.detail-hero { padding-block: clamp(80px, 11vw, 150px) clamp(64px, 8vw, 110px); }
.detail-hero h1 { margin-top: 18px; }
.detail-lead { max-width: 640px; margin-top: 28px; color: var(--ink-80); font-size: clamp(16px, 1.35vw, 19px); line-height: 1.8; word-break: keep-all; }
.detail-section { padding-block: var(--section-gap); border-top: 1px solid var(--ink-12); }
.detail-section--surface { max-width: none; }
.detail-section-heading { max-width: 640px; }
.detail-section-heading.reading { margin-inline: 0; }
.detail-section-heading h2 { margin-top: 14px; }
.detail-section-heading > p:last-child:not(.label) { margin-top: 20px; }
.detail-answer { padding-block: var(--section-gap); border-top: 1px solid var(--ink-12); }
.detail-answer h2 { margin-top: 14px; font-size: clamp(30px, 3.6vw, 48px); line-height: 1.3; }
.detail-muted { color: var(--ink-72); }
.detail-copy-grid { display: grid; grid-template-columns: minmax(260px, .9fr) minmax(0, 1.1fr); gap: 10%; margin-top: 56px; }
.detail-copy-grid > div { max-width: 620px; }
.detail-copy-grid > div > p + p { margin-top: 18px; }
.detail-copy-grid .detail-muted { font-size: 15px; }
.detail-emphasis { margin: 0; color: var(--ink); font-family: var(--serif); font-size: clamp(22px, 2.3vw, 30px); line-height: 1.55; letter-spacing: -.02em; word-break: keep-all; }

.detail-flow { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr); align-items: stretch; gap: 16px; margin-top: 56px; }
.detail-flow-step { padding: 18px 0 8px; border-top: 1px solid var(--ink-12); }
.detail-step-number { display: block; color: var(--ink-72); font-family: var(--mono); font-size: 12px; letter-spacing: .08em; }
.detail-flow-step h3 { margin-top: 28px; }
.detail-flow-step p { color: var(--ink-80); font-size: 14px; line-height: 1.75; }
.detail-flow-arrow { align-self: center; color: var(--ink-45); font-size: 18px; }

.detail-handoff { display: grid; grid-template-columns: minmax(0, 1fr) 96px minmax(0, 1fr); align-items: center; max-width: 980px; margin-top: 56px; }
.detail-handoff > div { padding: 20px 0; border-top: 1px solid var(--ink-12); }
.detail-handoff p:last-child { margin-top: 16px; color: var(--ink); font-family: var(--serif); font-size: clamp(20px, 2vw, 26px); line-height: 1.6; }
.detail-handoff-mark { display: flex; height: 1px; padding: 0 !important; align-items: center; justify-content: center; border: 0 !important; background: var(--ink-45); color: transparent; font-size: 0; }

.detail-steps { display: grid; max-width: 760px; margin-top: 48px; }
.detail-steps article { display: grid; grid-template-columns: 36px 1fr; gap: 12px; padding-block: 22px; border-top: 1px solid var(--ink-12); }
.detail-steps article:last-child { border-bottom: 1px solid var(--ink-12); }
.detail-steps article > span { color: var(--ink-72); font-family: var(--mono); font-size: 13px; line-height: 1.9; }
.detail-steps h3 { margin: 0 0 2px; font-size: 17px; }
.detail-steps p { color: var(--ink-80); font-size: 15px; }

.detail-callout { max-width: 760px; margin-top: 48px; padding: 4px 0 4px 20px; border-left: 2px solid var(--ink); }
.detail-callout strong { color: var(--ink); font-size: 14px; }
.detail-callout p { margin-top: 6px; color: var(--ink-80); font-size: 15px; line-height: 1.8; }
.detail-callout--caution { border-left-style: dashed; }
.detail-links { display: flex; align-items: center; flex-wrap: wrap; gap: 18px 28px; margin-top: 40px; }

.detail-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; margin-top: 48px; }
.detail-facts--stacked { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.detail-fact { padding-top: 18px; border-top: 1px solid var(--ink-12); }
.detail-fact--accent { border-top-color: var(--ink); }
.detail-fact--muted { border-top-style: dashed; }
.detail-fact h3 { margin-top: 20px; font-size: 18px; line-height: 1.45; }
.detail-fact p:last-child { margin-top: 8px; color: var(--ink-80); font-size: 14px; line-height: 1.8; }

.detail-meta { margin-top: 18px; color: var(--ink-72); font-size: 13px; }
.detail-meta a, .detail-notice a, .detail-callout a, .detail-copy-grid a { color: var(--ink); text-underline-offset: 4px; }
.detail-doc-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; margin-top: 48px; }
.detail-doc-card { min-width: 0; padding-top: 18px; border-top: 1px solid var(--ink-12); }
.detail-doc-index { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 10%; max-width: 900px; margin-top: 48px; }
.detail-doc-index article { padding-block: 22px; border-top: 1px solid var(--ink-12); }
.detail-doc-index h3 { margin-top: 10px; font-size: 17px; }
.detail-doc-index p:last-child { margin-top: 6px; color: var(--ink-80); font-size: 14px; line-height: 1.8; }
.detail-code { margin: 14px 0 0; padding: 18px 20px; overflow-x: auto; border-radius: 4px; background: var(--ink); color: var(--paper); font: 13px/1.7 var(--mono); white-space: pre; }
.detail-code code { color: inherit; font-size: inherit; }
.detail-notice { max-width: 800px; margin-top: 32px; padding: 18px 20px; border: 1px solid var(--ink-12); border-radius: 4px; }
.detail-notice strong { color: var(--ink); font-size: 14px; }
.detail-notice p { margin-top: 6px; color: var(--ink-80); font-size: 14px; line-height: 1.8; }
.detail-faq { max-width: 800px; margin-top: 48px; }
.detail-faq details { border-top: 1px solid var(--ink-12); }
.detail-faq details:last-child { border-bottom: 1px solid var(--ink-12); }
.detail-faq summary { padding: 20px 0; color: var(--ink); cursor: pointer; font-size: 17px; font-weight: 600; list-style-position: inside; }
.detail-faq details p { padding: 0 24px 22px 22px; color: var(--ink-80); font-size: 15px; line-height: 1.85; }
.detail-table-wrap { margin-top: 48px; overflow-x: auto; }
.detail-table { width: 100%; min-width: 700px; border-collapse: collapse; font-size: 14px; }
.detail-table th, .detail-table td { padding: 16px; border-top: 1px solid var(--ink-12); text-align: left; vertical-align: top; }
.detail-table thead th { color: var(--ink-72); font-size: 12px; font-weight: 500; letter-spacing: .06em; }
.detail-table tbody th { color: var(--ink); font-weight: 600; white-space: nowrap; }
.detail-table td { color: var(--ink-80); }
.detail-table code, .detail-flow-step code, .detail-steps code, .detail-doc-index code, .detail-notice code { color: var(--ink); }
.madang-note { max-width: 760px; margin-top: 32px; }

/* ---------- 에사 이야기: 함께 쓰는 도구·쓰이는 자리 ---------- */
.card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 48px; margin-top: 56px; }
.card { display: flex; flex-direction: column; padding-top: 18px; border-top: 1px solid var(--ink-12); }
.card h3 { margin-top: 28px; font-family: var(--serif); font-size: clamp(22px, 2.2vw, 28px); font-weight: 400; line-height: 1.45; letter-spacing: -.02em; }
.card-desc { margin-top: 12px; color: var(--ink-80); font-size: 15px; line-height: 1.85; }
.card-list { margin: 16px 0 0; padding-left: 18px; color: var(--ink-80); font-size: 14px; line-height: 1.85; }
.card-flow { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; padding: 0; list-style: none; counter-reset: flow; }
.card-flow li { padding: 3px 12px; border: 1px solid var(--ink-12); border-radius: 999px; color: var(--ink); font-size: 13px; counter-increment: flow; }
.card-flow li::before { content: counter(flow) "  "; color: var(--ink-72); }
.card-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 24px; margin-top: auto; padding-top: 28px; }
.card-note { margin-top: 14px; color: var(--ink-72); font-size: 13px; line-height: 1.7; }
.badge { display: inline-block; margin-left: 6px; padding: 0 8px; border: 1px solid var(--ink-45); border-radius: 999px; font-size: 11px; letter-spacing: .04em; vertical-align: 1px; }

/* ---------- 사용 사례 페이지 ---------- */
.case-page .detail-hero { padding-bottom: clamp(64px, 8vw, 110px); }
.case-hero-mark { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.case-hero-mark span { padding: 3px 12px; border: 1px solid var(--ink-12); border-radius: 999px; color: var(--ink-72); font-size: 12px; letter-spacing: .04em; }
.case-section-intro { max-width: 680px; }
.case-section-intro h2 { margin-top: 14px; }
.case-section-intro > p:last-child { margin-top: 20px; color: var(--ink-80); }
.case-product { padding-block: var(--section-gap); border-top: 1px solid var(--ink-12); }
.case-product-grid { display: grid; grid-template-columns: minmax(230px, .75fr) minmax(0, 1.45fr); gap: 10%; align-items: start; }
.case-product h2 { margin-top: 14px; }
.case-product-lead { margin-top: 24px; color: var(--ink-80); line-height: 1.85; }
.case-product-copy { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
.case-product-copy article { padding-top: 18px; border-top: 1px solid var(--ink-12); }
.case-product-copy h3 { margin-top: 20px; }
.case-product-copy p:last-child { margin-top: 6px; color: var(--ink-80); font-size: 14px; line-height: 1.8; }
.case-scope { margin-top: 32px; padding-top: 22px; border-top: 1px solid var(--ink-12); }
.case-scope p { color: var(--ink-80); font-size: 14px; line-height: 1.8; }
.case-scope strong { color: var(--ink); font-weight: 600; }
.case-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; margin-top: 48px; }
.case-metric { padding-top: 18px; border-top: 1px solid var(--ink-12); }
.case-metric strong { display: block; color: var(--ink); font-family: var(--serif); font-size: clamp(30px, 3.6vw, 44px); font-weight: 400; line-height: 1.15; letter-spacing: -.04em; }
.case-metric span { display: block; margin-top: 12px; color: var(--ink-80); font-size: 13px; line-height: 1.65; }
.case-metric--output { border-top-color: var(--ink); }
.case-note { max-width: 800px; margin-top: 28px; color: var(--ink-72); font-size: 13px; line-height: 1.75; }
.case-flow { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 24px; margin-top: 56px; }
.case-flow-step { padding-top: 18px; border-top: 1px solid var(--ink-12); }
.case-flow-step h3 { margin-top: 24px; }
.case-flow-step p { color: var(--ink-80); font-size: 14px; line-height: 1.75; }
.case-flow-arrow { align-self: center; color: var(--ink-45); font-size: 18px; text-align: center; }
.case-final { padding-block: var(--section-gap); border-top: 1px solid var(--ink-12); }
.case-final h2 { font-size: clamp(32px, 4.4vw, 56px); }
.case-final p { max-width: 620px; margin-top: 20px; color: var(--ink-80); }

/* ---------- 좁은 화면 ---------- */
@media (max-width: 760px) {
  :root { --gutter: 16px; --header-h: 60px; }
  body { font-size: 16px; }
  .site-header nav { gap: 16px; }
  .site-header nav a:not(.nav-start):not([aria-current="page"]) { display: none; }
  .hero-big { white-space: normal; word-break: keep-all; }
  .split, .detail-copy-grid, .case-product-grid { display: block; }
  .split > * + *, .detail-copy-grid > div { margin-top: 36px; }
  .principle-grid, .card-grid, .detail-facts, .detail-facts--stacked, .detail-doc-grid, .detail-doc-index, .case-product-copy, .case-metrics { grid-template-columns: 1fr; gap: 28px; margin-top: 40px; }
  .tool-row { gap: 16px 28px; }
  .more-line { flex-direction: column; gap: 12px; }
  .footer-inner { display: block; }
  .site-footer nav { justify-content: flex-start; margin-top: 24px; }
  .detail-flow, .case-flow { grid-template-columns: 1fr; gap: 0; margin-top: 40px; }
  .detail-flow-step h3, .case-flow-step h3 { margin-top: 10px; }
  .detail-flow-arrow, .case-flow-arrow { justify-self: start; margin: 6px 0 6px 10px; transform: rotate(90deg); }
  .detail-handoff { display: block; margin-top: 40px; }
  .detail-handoff-mark { width: 40px; margin: 8px 0; }
  .detail-links { align-items: flex-start; flex-direction: column; gap: 16px; }
  .detail-code, .snippet pre { font-size: 12px; padding: 14px 16px; }
}

/* ---------- 연결하기 (2026-09-20, ux-f1 인계서) — 문장 하나를 복사해 AI 에 붙여 넣는다 ---------- */
.snippet pre.connect-prompt, .connect-prompt { margin: 0; padding: 18px 20px; border: 1px solid var(--ink-12); border-radius: 4px; background: var(--ink-04); color: var(--ink); font: 15px/1.75 var(--sans); white-space: pre-wrap; word-break: keep-all; }
.snippet-actions, .connect-doc-actions { margin-top: 12px; }
.fine code, .connect-doc code { font-family: var(--mono); font-size: .9em; color: var(--ink); }
button.text-link { padding: 0; border: 0; background: none; cursor: pointer; font: inherit; }
.connect-doc { max-width: 760px; margin-top: 40px; }
.connect-doc h3 { margin-top: 44px; }
.connect-doc .detail-code { margin-top: 8px; }
.connect-doc-list { margin: 12px 0 0; padding-left: 18px; }
.connect-doc-list li { margin-bottom: 16px; }
.connect-doc-list p { margin-top: 4px; color: var(--ink-80); font-size: 15px; }