/* Vibe Adoption Framework — publish stylesheet */

:root {
  --ink: #161a26;
  --paper: #f7f8fa;
  --card: #ffffff;
  --blue: #1d2a5e;
  --blue-soft: #eef1f9;
  --orange: #e8590c;
  --orange-soft: #fdf0e7;
  --steel: #6a7382;
  --line: #dce0e8;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --serif: "Noto Serif KR", serif;
  --sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--orange); outline-offset: 2px; border-radius: 2px; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ---------- header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247, 248, 250, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand .mark {
  font-family: var(--mono); font-weight: 700; font-size: 15px;
  color: var(--blue); letter-spacing: 0.08em;
}
.brand .by { font-size: 12.5px; color: var(--steel); }
.site-nav { display: flex; gap: 20px; font-size: 14px; align-items: center; }
.site-nav a { color: var(--ink); }
.site-nav a:hover { color: var(--orange); text-decoration: none; }
.lang-switch {
  display: inline-flex; border: 1px solid var(--line); border-radius: 6px;
  overflow: hidden; font-family: var(--mono); font-size: 11.5px; margin-left: 6px;
}
.lang-switch a { padding: 4px 9px; color: var(--steel); }
.lang-switch a + a { border-left: 1px solid var(--line); }
.lang-switch a:hover { color: var(--orange); text-decoration: none; }
.lang-switch a.lang-active { background: var(--blue); color: #fff; }

/* ---------- hero ---------- */

.hero { padding: 88px 0 56px; border-bottom: 1px solid var(--line); background: var(--card); }
.eyebrow {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.22em;
  color: var(--orange); text-transform: uppercase; margin-bottom: 22px;
}
.hero h1 {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.35; letter-spacing: -0.01em; color: var(--ink);
  max-width: 21em;
}
.hero h1 em { font-style: normal; color: var(--blue); }
.hero .lede {
  margin-top: 26px; max-width: 42em; font-size: 18.5px; color: #3b4250;
}
.hero .meta {
  margin-top: 34px; display: flex; flex-wrap: wrap; gap: 10px;
  font-family: var(--mono); font-size: 12.5px;
}
.hero .meta span {
  border: 1px solid var(--line); border-radius: 999px;
  padding: 5px 14px; color: var(--steel); background: var(--paper);
}

/* ---------- framework map (signature) ---------- */

.map { padding: 46px 0 54px; border-bottom: 1px solid var(--line); }
.map h2.visually-hidden { position: absolute; left: -9999px; }
.rail { display: grid; grid-template-columns: 148px 1fr; gap: 14px; align-items: start; }
.rail + .rail { margin-top: 18px; padding-top: 18px; border-top: 1px dashed var(--line); }
.rail .rail-label {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.14em;
  color: var(--steel); text-transform: uppercase; padding-top: 8px;
}
.rail .rail-label strong { display: block; color: var(--blue); font-size: 13px; letter-spacing: 0.04em; }
.rail .chips { display: flex; flex-wrap: wrap; gap: 8px; }
.rail .chips a {
  display: inline-block; padding: 7px 14px; border-radius: 6px;
  border: 1px solid var(--line); background: var(--card);
  font-size: 14px; color: var(--ink); line-height: 1.4;
}
.rail .chips a:hover { border-color: var(--orange); color: var(--orange); text-decoration: none; }
.rail .chips .idx { font-family: var(--mono); font-size: 11px; color: var(--orange); margin-right: 7px; }

/* ---------- layout: toc + article ---------- */

.doc { display: grid; grid-template-columns: 232px minmax(0, 1fr); gap: 56px; padding: 56px 0 96px; }
.toc { position: sticky; top: 84px; align-self: start; font-size: 13.5px; }
.toc .toc-title {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em;
  color: var(--steel); text-transform: uppercase; margin-bottom: 14px;
}
.toc ol { list-style: none; border-left: 2px solid var(--line); }
.toc li a {
  display: block; padding: 6px 0 6px 16px; color: var(--steel);
  border-left: 2px solid transparent; margin-left: -2px; line-height: 1.45;
}
.toc li a:hover { color: var(--ink); text-decoration: none; }
.toc li a.active { color: var(--blue); border-left-color: var(--orange); font-weight: 600; }

article { max-width: 74ch; min-width: 0; }

/* ---------- article typography ---------- */

article section + section { margin-top: 84px; }
article h2 {
  font-family: var(--serif); font-size: 30px; font-weight: 700;
  line-height: 1.4; letter-spacing: -0.01em;
  padding-top: 8px; margin-bottom: 26px;
}
article h2 .no {
  display: block; font-family: var(--mono); font-size: 13px; font-weight: 500;
  letter-spacing: 0.2em; color: var(--orange); margin-bottom: 10px;
}
article h3 {
  font-size: 21px; font-weight: 700; margin: 46px 0 16px; letter-spacing: -0.01em;
}
article h3 .code { font-family: var(--mono); font-size: 12px; color: var(--steel); margin-right: 10px; letter-spacing: 0.08em; }
article h4 { font-size: 17px; font-weight: 700; margin: 34px 0 10px; color: var(--blue); }
article p { margin-bottom: 16px; }
article p:last-child { margin-bottom: 0; }
article ul, article ol { margin: 0 0 16px 22px; }
article li { margin-bottom: 8px; }
article strong { font-weight: 700; }
article .lead-q {
  font-size: 15px; color: var(--steel); margin: -8px 0 18px;
  font-family: var(--mono); font-size: 13px;
}

/* anti-pattern callout — the orange guardrail */
.anti {
  margin: 14px 0 22px; padding: 12px 16px;
  border-left: 3px solid var(--orange);
  background: var(--orange-soft); border-radius: 0 6px 6px 0;
  font-size: 15.5px;
}
.anti b {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.12em;
  color: var(--orange); text-transform: uppercase; margin-right: 8px;
}

/* principle cards */
.principle { margin: 22px 0; padding: 20px 22px; background: var(--card); border: 1px solid var(--line); border-radius: 8px; }
.principle h4 { margin: 0 0 8px; }
.principle h4 .pno { font-family: var(--mono); font-size: 11.5px; color: var(--orange); letter-spacing: 0.12em; margin-right: 8px; }

/* flow diagrams */
.flow { display: flex; flex-wrap: wrap; align-items: stretch; gap: 8px; margin: 26px 0; }
.flow .step {
  flex: 1 1 150px; background: var(--card); border: 1px solid var(--line);
  border-top: 3px solid var(--blue); border-radius: 6px;
  padding: 14px 14px 12px; font-size: 14px; line-height: 1.5;
}
.flow .step .k { font-family: var(--mono); font-size: 11px; color: var(--orange); letter-spacing: 0.1em; display: block; margin-bottom: 5px; }
.flow .step strong { display: block; font-size: 15px; margin-bottom: 3px; }
.flow .arr { align-self: center; color: var(--steel); font-size: 18px; flex: 0 0 auto; }
.flow-note { font-size: 13.5px; color: var(--steel); margin: -12px 0 22px; font-family: var(--mono); }

/* tables */
.tblwrap { overflow-x: auto; margin: 20px 0 28px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; background: var(--card); }
th, td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; vertical-align: top; }
th { background: var(--blue-soft); color: var(--blue); font-size: 13.5px; font-weight: 700; white-space: nowrap; }
td:first-child { font-weight: 600; white-space: nowrap; }
.tbl-glossary td:first-child { white-space: normal; }

/* asis→tobe pairs */
.shift { margin: 18px 0 20px; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.shift .row { display: grid; grid-template-columns: 84px 1fr; }
.shift .row + .row { border-top: 1px solid var(--line); }
.shift .tag {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.1em;
  display: flex; align-items: center; justify-content: center;
}
.shift .asis .tag { background: var(--paper); color: var(--steel); }
.shift .tobe .tag { background: var(--blue); color: #fff; }
.shift .row > div:last-child { padding: 12px 16px; background: var(--card); font-size: 15.5px; }

/* footer */
.site-footer { border-top: 1px solid var(--line); background: var(--card); padding: 40px 0 56px; font-size: 14px; color: var(--steel); }
.site-footer .cols { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; align-items: baseline; }
.site-footer a { color: var(--blue); }

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .doc { grid-template-columns: 1fr; gap: 0; padding-top: 40px; }
  .toc { position: static; margin-bottom: 40px; }
  .toc ol { display: flex; flex-wrap: wrap; gap: 2px 18px; border-left: 0; }
  .toc li a { padding-left: 0; border-left: 0; margin-left: 0; }
  .rail { grid-template-columns: 1fr; gap: 8px; }
  .hero { padding: 60px 0 44px; }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 16px; }
  .wrap { padding: 0 18px; }

  /* header: 고정 높이·sticky 해제, 내비게이션 줄바꿈 허용 */
  .site-header { position: static; }
  .site-header .wrap {
    height: auto; flex-wrap: wrap;
    padding-top: 12px; padding-bottom: 12px; gap: 8px 16px;
  }
  .brand .by { display: none; }
  .site-nav { flex-wrap: wrap; gap: 8px 16px; font-size: 13.5px; }

  body { font-size: 16px; }
  .hero { padding: 44px 0 36px; }
  .hero .lede { font-size: 16.5px; margin-top: 20px; }
  .hero .meta { margin-top: 24px; }

  article section + section { margin-top: 60px; }
  article h2 { font-size: 25px; }
  article h3 { font-size: 19px; margin-top: 38px; }

  /* 표: 첫 열·헤더의 nowrap 해제로 가로 스크롤 최소화 */
  table { font-size: 14px; }
  th, td { padding: 8px 10px; }
  th, td:first-child { white-space: normal; }

  /* 플로우: 세로 스택 + 화살표 회전 */
  .flow { flex-direction: column; gap: 6px; }
  .flow .step { flex: 1 1 auto; }
  .flow .arr { transform: rotate(90deg); align-self: flex-start; margin-left: 18px; }

  .shift .row { grid-template-columns: 64px 1fr; }
  .shift .row > div:last-child { padding: 10px 12px; font-size: 14.5px; }
  .anti { font-size: 14.5px; padding: 10px 14px; }
  .principle { padding: 16px 16px; }
  .rail .chips a { font-size: 13.5px; padding: 6px 11px; }
}

@media (max-width: 400px) {
  .lang-switch { margin-left: 0; }
  .site-nav { gap: 6px 12px; }
  article h2 { font-size: 23px; }
}