/* ObsiKO 도움말·튜토리얼 공용 셸 (kb = knowledge base)
   원본은 이 파일 하나다 — 생성기(build-docs.py·build-tutorials.py)는 주소에 해시만 붙여 링크한다.
   토큰은 랜딩(index.html html[data-theme=dark])과 같은 값이다. 다크 전용·행동색은 골드 하나(site/DESIGN.md).
   영역 전용 스타일: kb-docs.css(도움말 허브·문서) · kb-tut.css(튜토리얼 목록·본문) */

:root {
  --bg: #111520;
  --well: #0d121c;
  --well-deep: #090d15;
  --surface: #1a2230;
  --surface-2: #232d3e;
  --surface-3: #2c3850;
  --text: #f0e9df;
  --text-soft: #d8cdbf;
  --muted: #9fa8b8;
  --faint: #6e798b;
  --border: rgba(255, 244, 230, .10);
  --border-strong: rgba(255, 244, 230, .16);
  --gold: #e6a24a;
  --gold-ink: #221604;
  --gold-tint: color-mix(in srgb, var(--gold) 14%, transparent);
  --gold-line: color-mix(in srgb, var(--gold) 42%, transparent);
  --accent-text: #c8b48a;
  --shadow: 0 10px 30px -14px rgba(0, 0, 0, .6);
  --shadow-pop: 0 24px 60px -18px rgba(0, 0, 0, .7), 0 0 0 1px var(--border-strong);
  --radius: 18px;
  --radius-sm: 12px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --spring: cubic-bezier(.34, 1.56, .64, 1);
  --flow: cubic-bezier(.3, .86, .27, .99);
  --font-sans: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Noto Sans KR', 'Segoe UI', sans-serif;
  --font-display: 'Gowun Batang', 'Pretendard Variable', Pretendard, 'AppleMyungjo', serif;
  --font-mono: 'SF Mono', ui-monospace, 'JetBrains Mono', Menlo, Consolas, monospace;
  --top-h: 60px;
  --top-gap: 12px;
  --maxw: 1320px;
  color-scheme: dark;
}

/* 고운바탕엔 가나·한자가 없다 — 일본어·중국어 제목은 그 언어의 명조로(글자마다 글꼴이 갈리지 않게) */
:root:lang(ja) {
  --font-sans: 'Pretendard Variable', Pretendard, 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', 'Yu Gothic', sans-serif;
  --font-display: 'Hiragino Mincho ProN', 'Yu Mincho', 'YuMincho', 'Noto Serif JP', serif;
}

:root:lang(zh-Hant) {
  --font-sans: 'Pretendard Variable', Pretendard, 'PingFang TC', 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
  --font-display: 'Songti TC', 'Noto Serif TC', 'PMingLiU', serif;
}

:root:lang(zh-Hans) {
  --font-sans: 'Pretendard Variable', Pretendard, 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-display: 'Songti SC', 'Noto Serif SC', 'SimSun', serif;
}

*,
*::before,
*::after {
  box-sizing: border-box
}

/* 가로 넘침은 루트에서 자른다 — 하나라도 삐져나가면 모바일 브라우저가 페이지를 넓혀 통째로 축소해 보인다 */
html {
  overflow-x: clip;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--top-h) + var(--top-gap) + 18px);
  background: var(--bg)
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip
}

/* 한국어는 낱말 단위로 줄을 바꾼다 — 중국어·일본어는 기본값(keep-all 이면 글자가 넘친다) */
:lang(ko) {
  word-break: keep-all
}

/* 성운 — 랜딩 body::before 와 같은 문법(틸·골드·블루, 알파 ≤ .15, 보라 금지). fixed 레이어 한 장 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(46% 34% at 8% 6%, rgba(63, 185, 143, .10), transparent 70%),
    radial-gradient(52% 40% at 88% 10%, rgba(230, 179, 92, .08), transparent 72%),
    radial-gradient(60% 46% at 28% 60%, rgba(95, 138, 206, .10), transparent 74%),
    radial-gradient(48% 40% at 92% 94%, rgba(84, 140, 205, .10), transparent 72%)
}

a {
  color: var(--gold);
  text-decoration: none
}

img,
svg {
  max-width: 100%
}

::selection {
  background: color-mix(in srgb, var(--gold) 34%, transparent);
  color: var(--text)
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 6px
}

button {
  font: inherit;
  color: inherit
}

[hidden] {
  display: none !important
}

.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0
}

.ic {
  width: 18px;
  height: 18px;
  flex: none
}

/* 얇은 스크롤바 — 넘칠 때만 보이고 오른쪽 벽에 붙는다 */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 244, 230, .16) transparent
}

.kb-skip {
  position: fixed;
  left: 16px;
  top: -60px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--gold);
  color: var(--gold-ink);
  font-weight: 800;
  transition: top .2s var(--ease)
}

.kb-skip:focus {
  top: 12px
}

/* ───────────── 상단바 — 랜딩의 떠 있는 알약(nav.bar)과 같은 문법 ───────────── */
.kb-top {
  position: fixed;
  inset: var(--top-gap) 0 auto;
  z-index: 60;
  display: flex;
  justify-content: center;
  pointer-events: none;
  view-transition-name: kb-top
}

.kb-top-in {
  pointer-events: auto;
  width: min(var(--maxw), calc(100% - 24px));
  height: var(--top-h);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 10px 0 16px;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: 0 8px 24px -16px rgba(0, 0, 0, .7);
  transition: box-shadow .3s, border-color .3s, background .3s
}

.kb-scrolled .kb-top-in {
  border-color: var(--border-strong);
  background: color-mix(in srgb, var(--surface) 97%, transparent);
  box-shadow: 0 14px 34px -14px rgba(0, 0, 0, .8)
}

.kb-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--text);
  font-weight: 800;
  font-size: 1.04rem;
  letter-spacing: -.02em;
  flex: none
}

.kb-brand .mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: block;
  box-shadow: 0 4px 14px -4px rgba(127, 155, 209, .55)
}

.kb-spring {
  flex: 1
}

/* 섹션 전환 — 활성 알약은 페이지 사이에서 미끄러져 옮겨 간다(view-transition-name) */
.kb-seg {
  position: relative;
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  margin-left: 6px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--well) 70%, transparent);
  border: 1px solid var(--border)
}

.kb-seg a {
  position: relative;
  z-index: 1;
  padding: 6px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-size: .9rem;
  font-weight: 700;
  transition: color .2s
}

.kb-seg a:hover {
  color: var(--text)
}

.kb-seg a.on {
  color: var(--gold)
}

.kb-seg a.on::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background: var(--gold-tint);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--gold) 30%, transparent);
  view-transition-name: kb-seg-pill
}

.kb-seg-pill {
  display: none
}

.kb-search-btn {
  appearance: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 40px;
  min-width: 0;
  width: min(300px, 26vw);
  padding: 0 8px 0 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--well) 60%, transparent);
  color: var(--muted);
  font-size: .9rem;
  transition: border-color .2s, background .2s, color .2s
}

.kb-search-btn:hover {
  border-color: var(--border-strong);
  background: var(--surface-2);
  color: var(--text-soft)
}

.kb-search-btn .t {
  flex: 1;
  text-align: left;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis
}

.kb-kbd,
kbd {
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 600;
  line-height: 1;
  padding: 5px 7px;
  border-radius: 7px;
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  background: var(--surface);
  color: var(--text-soft);
  white-space: nowrap
}

.kb-lang {
  position: relative;
  flex: none
}

.kb-lang>summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 40px;
  padding: 0 10px 0 11px;
  border-radius: 999px;
  color: var(--text-soft);
  font-size: .86rem;
  font-weight: 600;
  transition: background .2s, color .2s
}

.kb-lang>summary::-webkit-details-marker {
  display: none
}

.kb-lang>summary:hover,
.kb-lang[open]>summary {
  background: var(--surface-2);
  color: var(--text)
}

.kb-lang .dn {
  width: 14px;
  height: 14px;
  transition: transform .25s var(--ease)
}

.kb-lang[open] .dn {
  transform: rotate(180deg)
}

.kb-lang-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 190px;
  padding: 6px;
  border-radius: 16px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-pop);
  transform-origin: top right;
  animation: kbPop .18s var(--ease)
}

.kb-lang-menu a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 10px;
  color: var(--text-soft);
  font-size: .9rem
}

.kb-lang-menu a:hover {
  background: var(--surface-2);
  color: var(--text)
}

.kb-lang-menu a.on {
  color: var(--gold);
  font-weight: 700
}

.kb-lang-menu .ck {
  width: 16px;
  height: 16px
}

.kb-get {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  background: var(--gold);
  color: var(--gold-ink);
  font-weight: 800;
  font-size: .88rem;
  letter-spacing: -.01em;
  box-shadow: 0 2px 10px -4px rgba(230, 162, 74, .45);
  transition: transform .18s var(--ease), box-shadow .25s, filter .2s;
  flex: none
}

.kb-get:hover {
  transform: translateY(-1px);
  filter: saturate(1.08) brightness(1.04);
  box-shadow: 0 6px 18px -6px rgba(230, 162, 74, .5)
}

.kb-get .ic {
  width: 16px;
  height: 16px
}

.kb-menu-btn,
.kb-icon-btn {
  appearance: none;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-soft);
  flex: none;
  transition: background .2s, color .2s
}

.kb-icon-btn {
  display: inline-flex
}

.kb-menu-btn:hover,
.kb-icon-btn:hover {
  background: var(--surface-2);
  color: var(--text)
}

@media (max-width: 1100px) {
  .kb-get span {
    display: none
  }

  .kb-get {
    width: 40px;
    padding: 0;
    justify-content: center
  }
}

@media (max-width: 860px) {
  :root {
    --top-h: 56px;
    --top-gap: 8px
  }

  .kb-top-in {
    padding: 0 8px 0 12px;
    gap: 6px
  }

  .kb-seg,
  .kb-lang,
  .kb-get {
    display: none
  }

  .kb-search-btn {
    width: 40px;
    padding: 0;
    justify-content: center
  }

  .kb-search-btn .t,
  .kb-search-btn .kb-kbd {
    display: none
  }

  .kb-menu-btn {
    display: inline-flex
  }
}

/* ───────────── 서랍(좁은 화면) ───────────── */
.kb-drawer {
  position: fixed;
  inset: 0;
  z-index: 90
}

.kb-drawer-scrim {
  position: absolute;
  inset: 0;
  background: rgba(4, 7, 13, .62);
  opacity: 0;
  transition: opacity .28s var(--ease)
}

.kb-drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(360px, 88vw);
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 0 16px calc(20px + env(safe-area-inset-bottom));
  background: var(--well);
  border-left: 1px solid var(--border-strong);
  box-shadow: -20px 0 50px -20px rgba(0, 0, 0, .8);
  overflow-y: auto;
  overscroll-behavior: contain;
  transform: translateX(104%);
  transition: transform .34s var(--flow)
}

.kb-drawer.is-open .kb-drawer-scrim {
  opacity: 1
}

.kb-drawer.is-open .kb-drawer-panel {
  transform: none
}

/* 서랍 머리(메뉴·닫기)는 목록을 굴려도 위에 남는다 */
.kb-drawer-head {
  position: sticky;
  top: 0;
  z-index: 2;
  margin: 0 -16px;
  padding: calc(12px + env(safe-area-inset-top)) 16px 10px;
  background: linear-gradient(var(--well) 82%, color-mix(in srgb, var(--well) 0%, transparent));
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 800;
  color: var(--muted);
  font-size: .82rem;
  letter-spacing: .12em;
  text-transform: uppercase
}

.kb-drawer-sec {
  display: grid;
  gap: 4px
}

.kb-drawer-sec a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  color: var(--text-soft);
  font-weight: 700;
  background: var(--surface);
  border: 1px solid var(--border)
}

.kb-drawer-sec a.on {
  color: var(--gold);
  border-color: var(--gold-line);
  background: var(--gold-tint)
}

.kb-drawer-langs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--border)
}

.kb-drawer-langs a {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: .84rem
}

.kb-drawer-langs a.on {
  color: var(--gold);
  border-color: var(--gold-line)
}

/* ───────────── 공용 조각 ───────────── */
.kb-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold)
}

.kb-kicker .ic {
  width: 15px;
  height: 15px
}

.kb-h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  line-height: 1.16;
  letter-spacing: -.03em;
  text-wrap: balance;
  margin: 0 0 10px
}

.kb-sub {
  color: var(--muted);
  margin: 0;
  max-width: 60ch;
  font-size: 1.02rem
}

.kb-btn {
  appearance: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  border: 0;
  background: var(--gold);
  color: var(--gold-ink);
  font-weight: 800;
  letter-spacing: -.01em;
  box-shadow: 0 2px 10px -4px rgba(230, 162, 74, .4);
  transition: transform .18s var(--ease), box-shadow .25s, filter .2s
}

.kb-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px -8px rgba(230, 162, 74, .5);
  filter: saturate(1.08) brightness(1.04)
}

.kb-btn:active {
  transform: translateY(0) scale(.98)
}

.kb-btn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
  box-shadow: none
}

.kb-btn.ghost:hover {
  background: var(--surface-2);
  filter: none
}

.kb-btn .ic {
  transition: transform .25s var(--spring)
}

.kb-btn:hover .ic.go {
  transform: translateX(3px)
}

.kb-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  color: var(--text-soft);
  font-size: .88rem;
  font-weight: 600;
  transition: border-color .2s, color .2s, background .2s, transform .2s var(--ease)
}

a.kb-chip:hover,
button.kb-chip:hover {
  border-color: var(--gold-line);
  color: var(--text);
  transform: translateY(-1px)
}

.kb-wrap {
  width: min(var(--maxw), calc(100% - 40px));
  margin: 0 auto
}

/* 스크롤 등장 — 허브(목록) 화면에만 쓴다. 본문(읽는 화면)엔 붙이지 않는다 */
.kb-rv {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  transition-delay: calc(var(--i, 0) * 60ms)
}

.kb-rv.in {
  opacity: 1;
  transform: none
}

/* JS 가 없으면 등장 연출 없이 바로 보인다 */
.no-js .kb-rv {
  opacity: 1;
  transform: none
}

@keyframes kbPop {
  from {
    opacity: 0;
    transform: translateY(-6px) scale(.97)
  }
}

@keyframes kbFadeUp {
  from {
    opacity: 0;
    transform: translateY(14px)
  }
}

@keyframes kbTwinkle {

  0%,
  100% {
    opacity: var(--tw-lo, .25)
  }

  50% {
    opacity: var(--tw-hi, 1)
  }
}

/* ───────────── 본문 타이포그래피(.kb-prose) — 도움말·튜토리얼 공통 ───────────── */
.kb-prose {
  font-size: 1.04rem;
  line-height: 1.85;
  color: var(--text-soft);
  overflow-wrap: break-word
}

.kb-prose :where(p, ul, ol, blockquote, figure, pre, .kb-table) {
  margin: 0 0 1.15em
}

.kb-prose h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4.2vw, 2.9rem);
  line-height: 1.18;
  letter-spacing: -.03em;
  color: var(--text);
  text-wrap: balance;
  margin: 0 0 14px
}

.kb-prose h2 {
  position: relative;
  font-size: clamp(1.32rem, 2.4vw, 1.6rem);
  line-height: 1.35;
  letter-spacing: -.02em;
  color: var(--text);
  margin: 2.3em 0 .7em;
  padding-top: .9em;
  border-top: 1px solid var(--border)
}

.kb-prose h3 {
  position: relative;
  font-size: 1.16rem;
  line-height: 1.45;
  color: var(--text);
  margin: 1.9em 0 .6em
}

.kb-prose h4 {
  font-size: 1rem;
  color: var(--text);
  margin: 1.6em 0 .5em
}

.kb-prose strong {
  color: var(--text);
  font-weight: 700
}

.kb-prose a {
  color: var(--accent-text);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent-text) 40%, transparent);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color .15s, text-decoration-color .15s
}

.kb-prose a:hover {
  color: var(--gold);
  text-decoration-color: var(--gold)
}

.kb-prose ul,
.kb-prose ol {
  padding-left: 1.4em
}

.kb-prose li {
  margin: .3em 0
}

.kb-prose li>ul,
.kb-prose li>ol {
  margin: .3em 0 .2em
}

.kb-prose ul>li::marker {
  color: var(--gold);
  font-size: .9em
}

.kb-prose ol>li::marker {
  color: var(--gold);
  font-weight: 700;
  font-variant-numeric: tabular-nums
}

.kb-prose mark {
  background: color-mix(in srgb, var(--gold) 26%, transparent);
  color: var(--text);
  border-radius: 4px;
  padding: 0 .15em
}

.kb-prose del {
  color: var(--muted)
}

.kb-prose hr {
  border: 0;
  height: 1px;
  margin: 2.4em 0;
  background: linear-gradient(90deg, transparent, var(--border-strong) 20%, var(--border-strong) 80%, transparent);
  overflow: visible;
  position: relative
}

.kb-prose hr::after {
  content: '✦';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -52%);
  padding: 0 12px;
  background: var(--bg);
  color: var(--gold);
  font-size: .78rem;
  line-height: 1
}

.kb-prose code {
  font-family: var(--font-mono);
  font-size: .86em;
  padding: .14em .45em;
  border-radius: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text)
}

.kb-prose pre {
  position: relative;
  padding: 18px 20px;
  border-radius: 14px;
  background: var(--well-deep);
  border: 1px solid var(--border);
  overflow-x: auto;
  line-height: 1.6;
  font-size: .9rem
}

.kb-prose pre code {
  padding: 0;
  border: 0;
  background: none;
  font-size: inherit;
  color: var(--text-soft)
}

.kb-copy {
  position: absolute;
  top: 8px;
  right: 8px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 10px;
  border-radius: 9px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--muted);
  font-size: .76rem;
  font-weight: 700;
  cursor: pointer;
  opacity: 0;
  transition: opacity .2s, color .2s, border-color .2s
}

.kb-prose pre:hover .kb-copy,
.kb-copy:focus-visible,
.kb-copy.done {
  opacity: 1
}

.kb-copy.done {
  color: var(--gold);
  border-color: var(--gold-line)
}

.kb-copy .ic {
  width: 14px;
  height: 14px
}

@media (hover: none) {
  .kb-copy {
    opacity: 1
  }
}

.kb-prose blockquote {
  padding: 14px 20px;
  border-radius: 0 14px 14px 0;
  border-left: 3px solid var(--gold);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  color: var(--text-soft)
}

.kb-prose blockquote p {
  margin: .35em 0
}

.kb-prose blockquote.kb-lead {
  padding: 4px 0 4px 22px;
  border-radius: 0;
  border-left: 2px solid transparent;
  border-image: linear-gradient(var(--gold), color-mix(in srgb, var(--gold) 0%, transparent)) 1;
  background: none;
  font-size: 1.12rem;
  line-height: 1.75;
  color: var(--text-soft)
}

.kb-callout {
  border-left: 0 !important;
  border-radius: 14px !important;
  border: 1px solid var(--border-strong) !important;
  background: var(--surface) !important
}

.kb-callout-k {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-right: 8px;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--gold)
}

.kb-callout-k .ic {
  width: 16px;
  height: 16px
}

.kb-callout.is-warn {
  border-color: color-mix(in srgb, #d98a8f 50%, transparent) !important
}

.kb-callout.is-warn .kb-callout-k {
  color: #e9a0a5
}

.kb-table {
  overflow-x: auto;
  border-radius: 14px;
  border: 1px solid var(--border-strong)
}

.kb-prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: .94rem;
  line-height: 1.6
}

.kb-prose th,
.kb-prose td {
  padding: 10px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border)
}

.kb-prose th {
  background: var(--surface-2);
  color: var(--text);
  font-weight: 700;
  white-space: nowrap
}

.kb-prose tr:last-child td {
  border-bottom: 0
}

.kb-prose tbody tr:hover td {
  background: color-mix(in srgb, var(--surface) 60%, transparent)
}

/* 스샷 — 랜딩 .shot-art 의 문법(헤어라인 + 깊은 그림자 + 골드 후광 ≤ .28). 스샷 자체엔 필터를 씌우지 않는다 */
.kb-shot {
  margin: 1.6em 0 1.8em;
  text-align: center
}

.kb-shot img,
.kb-prose img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: 14px;
  border: 1px solid rgba(255, 244, 230, .14);
  box-shadow: 0 22px 50px -26px rgba(0, 0, 0, .9), 0 0 60px -30px rgba(230, 162, 74, .22);
  background: var(--surface)
}

.kb-shot img[data-kb-zoom] {
  cursor: zoom-in;
  transition: transform .45s var(--flow), box-shadow .45s var(--flow)
}

@media (hover: hover) {
  .kb-shot img[data-kb-zoom]:hover {
    transform: translateY(-3px);
    box-shadow: 0 30px 60px -26px rgba(0, 0, 0, .95), 0 0 70px -26px rgba(230, 162, 74, .3)
  }
}

.kb-shot figcaption {
  margin-top: 12px;
  font-size: .86rem;
  line-height: 1.55;
  color: var(--muted)
}

/* 소제목 링크 — 마우스를 올리면 왼쪽에 '#', 누르면 주소 복사 */
.kb-anchor {
  position: absolute;
  left: -30px;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 7px;
  border: 0;
  background: none;
  color: var(--faint);
  font: 700 .95rem/1 var(--font-mono);
  cursor: pointer;
  opacity: 0;
  transition: opacity .15s, color .15s, background .15s
}

.kb-prose h2 .kb-anchor {
  top: calc(50% + .45em)
}

.kb-prose :is(h2, h3):hover .kb-anchor,
.kb-anchor:focus-visible {
  opacity: 1
}

.kb-anchor:hover {
  color: var(--gold);
  background: var(--surface)
}

@media (max-width: 900px) {
  .kb-anchor {
    display: none
  }
}

/* 방금 이동해 온 소제목을 잠깐 짚어 준다 */
.kb-flash {
  animation: kbFlash 1.6s var(--ease)
}

@keyframes kbFlash {
  0% {
    text-shadow: 0 0 0 transparent
  }

  25% {
    color: var(--gold);
    text-shadow: 0 0 22px rgba(230, 162, 74, .45)
  }

  100% {
    text-shadow: 0 0 0 transparent
  }
}

/* ───────────── 검색 팔레트(⌘K) ───────────── */
.kb-pal {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: min(12vh, 110px) 12px 12px
}

.kb-pal-scrim {
  position: absolute;
  inset: 0;
  background: rgba(4, 7, 13, .66);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: kbFade .2s var(--ease)
}

@keyframes kbFade {
  from {
    opacity: 0
  }
}

.kb-pal-box {
  position: relative;
  width: min(660px, 100%);
  max-height: min(640px, calc(100dvh - 140px));
  display: flex;
  flex-direction: column;
  border-radius: 22px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  box-shadow: 0 40px 100px -30px rgba(0, 0, 0, .95), 0 0 0 1px rgba(0, 0, 0, .3), 0 0 80px -40px rgba(230, 162, 74, .35);
  overflow: hidden;
  animation: kbPalIn .26s var(--spring)
}

@keyframes kbPalIn {
  from {
    opacity: 0;
    transform: translateY(-10px) scale(.97)
  }
}

.kb-pal-in {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border)
}

.kb-pal-in .ic {
  width: 20px;
  height: 20px;
  color: var(--gold)
}

.kb-pal-in input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: none;
  color: var(--text);
  font: 500 1.08rem/1.4 var(--font-sans)
}

.kb-pal-in input::placeholder {
  color: var(--faint)
}

.kb-pal-in input::-webkit-search-cancel-button {
  -webkit-appearance: none
}

.kb-pal-esc {
  appearance: none;
  cursor: pointer;
  border: 0;
  background: none;
  padding: 0
}

.kb-pal-scopes {
  display: flex;
  gap: 6px;
  padding: 10px 18px 0
}

.kb-pal-scopes button {
  appearance: none;
  cursor: pointer;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 700;
  transition: color .2s, border-color .2s, background .2s
}

.kb-pal-scopes button[aria-pressed=true] {
  color: var(--gold);
  border-color: var(--gold-line);
  background: var(--gold-tint)
}

.kb-pal-list {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 8px 8px 10px;
  scroll-padding: 8px
}

.kb-pal-g {
  margin: 10px 12px 6px;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--faint)
}

.kb-pal-row {
  position: relative;
  display: grid;
  grid-template-columns: 34px 1fr auto;
  gap: 2px 12px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 14px;
  color: var(--text-soft);
  animation: kbFadeUp .25s var(--ease) both;
  animation-delay: calc(var(--i, 0) * 18ms)
}

.kb-pal-row .ico {
  grid-row: span 2;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--surface-2);
  color: var(--muted)
}

.kb-pal-row .ico .ic {
  width: 17px;
  height: 17px
}

.kb-pal-row .t {
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap
}

.kb-pal-row .s {
  grid-column: 2;
  font-size: .82rem;
  line-height: 1.5;
  color: var(--muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden
}

.kb-pal-row .tag {
  grid-row: 1;
  grid-column: 3;
  font-size: .72rem;
  font-weight: 700;
  color: var(--faint);
  white-space: nowrap
}

.kb-pal-row .go {
  grid-row: 2;
  grid-column: 3;
  justify-self: end;
  width: 16px;
  height: 16px;
  color: var(--gold);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity .15s, transform .2s var(--ease)
}

.kb-pal-row.on {
  background: var(--surface-2);
  box-shadow: inset 2px 0 0 var(--gold)
}

.kb-pal-row.on .ico {
  background: var(--gold-tint);
  color: var(--gold)
}

.kb-pal-row.on .go {
  opacity: 1;
  transform: none
}

.kb-pal-row mark {
  background: none;
  color: var(--gold);
  font-weight: 800
}

.kb-pal-empty {
  padding: 34px 20px 30px;
  text-align: center;
  color: var(--muted);
  font-size: .94rem
}

.kb-pal-empty b {
  display: block;
  margin-bottom: 4px;
  font-size: 1.6rem;
  color: var(--gold)
}

.kb-pal-foot {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 18px;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--well) 70%, transparent);
  color: var(--faint);
  font-size: .76rem
}

.kb-pal-foot span {
  display: inline-flex;
  align-items: center;
  gap: 6px
}

.kb-pal-foot kbd {
  padding: 3px 6px;
  font-size: .68rem
}

.kb-pal-foot .sp {
  flex: 1
}

@media (max-width: 640px) {
  .kb-pal {
    padding: 0
  }

  .kb-pal-box {
    width: 100%;
    max-height: 100dvh;
    height: 100dvh;
    border-radius: 0;
    border: 0;
    animation-name: kbFade
  }

  .kb-pal-in {
    padding-top: calc(14px + env(safe-area-inset-top))
  }

  .kb-pal-foot {
    display: none
  }
}

/* ───────────── 라이트박스 ───────────── */
.kb-lb {
  position: fixed;
  inset: 0;
  z-index: 130;
  display: grid;
  place-items: center;
  padding: 56px 72px 90px
}

.kb-lb-scrim {
  position: absolute;
  inset: 0;
  background: rgba(4, 7, 13, .9);
  opacity: 0;
  transition: opacity .3s var(--ease)
}

.kb-lb.is-open .kb-lb-scrim {
  opacity: 1
}

.kb-lb-img {
  position: relative;
  max-width: 100%;
  max-height: calc(100dvh - 146px);
  width: auto;
  height: auto;
  border-radius: 14px;
  box-shadow: 0 40px 120px -30px rgba(0, 0, 0, 1);
  transform-origin: top left;
  cursor: zoom-out;
  user-select: none;
  -webkit-user-select: none
}

.kb-lb-cap {
  position: absolute;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%);
  width: min(720px, calc(100% - 40px));
  text-align: center;
  color: var(--text-soft);
  font-size: .92rem;
  line-height: 1.5;
  opacity: 0;
  transition: opacity .3s .1s
}

.kb-lb.is-open .kb-lb-cap {
  opacity: 1
}

.kb-lb-cap small {
  display: block;
  margin-top: 4px;
  color: var(--faint);
  font-variant-numeric: tabular-nums
}

.kb-lb-btn {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  color: var(--text);
  cursor: pointer;
  opacity: 0;
  transition: opacity .3s, background .2s, transform .2s var(--ease)
}

.kb-lb.is-open .kb-lb-btn {
  opacity: 1
}

.kb-lb-btn:hover {
  background: var(--surface-2);
  transform: scale(1.06)
}

.kb-lb-x {
  top: 16px;
  right: 16px
}

.kb-lb-prev {
  left: 16px;
  top: 50%;
  margin-top: -23px
}

.kb-lb-next {
  right: 16px;
  top: 50%;
  margin-top: -23px
}

@media (max-width: 640px) {
  .kb-lb {
    padding: 64px 10px 110px
  }

  .kb-lb-prev,
  .kb-lb-next {
    top: auto;
    bottom: 26px;
    margin: 0
  }

  .kb-lb-cap {
    bottom: 84px
  }
}

/* ───────────── 토스트 · 맨 위로 ───────────── */
.kb-toast {
  position: fixed;
  left: 50%;
  bottom: calc(24px + env(safe-area-inset-bottom));
  z-index: 140;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 18px 11px 14px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-pop);
  color: var(--text);
  font-size: .9rem;
  font-weight: 600;
  transform: translate(-50%, 20px);
  opacity: 0;
  transition: transform .35s var(--spring), opacity .25s;
  pointer-events: none
}

.kb-toast.show {
  transform: translate(-50%, 0);
  opacity: 1
}

.kb-toast .ic {
  color: var(--gold)
}

.kb-totop {
  position: fixed;
  right: max(18px, env(safe-area-inset-right));
  bottom: calc(18px + env(safe-area-inset-bottom));
  z-index: 50;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  color: var(--text-soft);
  box-shadow: var(--shadow);
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px) scale(.9);
  transition: opacity .25s, transform .3s var(--spring), color .2s, border-color .2s;
  pointer-events: none
}

.kb-totop.show {
  opacity: 1;
  transform: none;
  pointer-events: auto
}

.kb-totop:hover {
  color: var(--gold);
  border-color: var(--gold-line)
}

/* ───────────── 푸터 ───────────── */
.kb-foot {
  margin-top: 96px;
  border-top: 1px solid var(--border);
  background: linear-gradient(to bottom, transparent, color-mix(in srgb, var(--well) 70%, transparent));
  view-transition-name: kb-foot
}

.kb-foot-in {
  width: min(var(--maxw), calc(100% - 40px));
  margin: 0 auto;
  padding: 56px 0 36px;
  display: grid;
  grid-template-columns: minmax(220px, 1.2fr) 2fr;
  gap: 36px 56px
}

.kb-foot-brand p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: .9rem;
  max-width: 30ch
}

.kb-foot-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px
}

.kb-foot-cols .h {
  margin: 0 0 12px;
  font-size: .74rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--faint)
}

.kb-foot-cols a {
  display: block;
  padding: 4px 0;
  color: var(--text-soft);
  font-size: .92rem;
  transition: color .15s
}

.kb-foot-cols a:hover {
  color: var(--gold)
}

.kb-foot-bottom {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  color: var(--faint);
  font-size: .84rem
}

.kb-foot-langs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px
}

.kb-foot-langs a {
  color: var(--muted)
}

.kb-foot-langs a.on,
.kb-foot-langs a:hover {
  color: var(--gold)
}

.kb-foot-note {
  grid-column: 1 / -1;
  margin: -14px 0 0;
  color: var(--faint);
  font-size: .78rem
}

@media (max-width: 760px) {
  .kb-foot-in {
    grid-template-columns: 1fr
  }

  .kb-foot-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr))
  }
}

/* ───────────── 페이지 전환(View Transitions, 같은 출처 이동) ─────────────
   상단바·푸터는 제자리, 본문만 살짝 밀려 바뀐다. 지원하지 않는 브라우저는 그냥 이동한다. */
@view-transition {
  navigation: auto
}

::view-transition-old(root) {
  animation: kbVtOut .22s var(--ease) both
}

::view-transition-new(root) {
  animation: kbVtIn .34s var(--flow) both
}

::view-transition-group(kb-seg-pill) {
  animation-duration: .38s;
  animation-timing-function: var(--flow)
}

@keyframes kbVtOut {
  to {
    opacity: 0;
    transform: translateY(-6px)
  }
}

@keyframes kbVtIn {
  from {
    opacity: 0;
    transform: translateY(10px)
  }
}

/* ───────────── 움직임 줄이기 — 모든 연출을 끈다(멈춘 화면이 곧 완성 화면이게 짰다) ───────────── */
@media (prefers-reduced-motion: reduce) {
  @view-transition {
    navigation: none
  }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important
  }

  .kb-rv {
    opacity: 1;
    transform: none
  }
}

@media print {

  .kb-top,
  .kb-foot,
  .kb-totop,
  .kb-drawer,
  .kb-nav,
  .kb-toc,
  .tut-rail {
    display: none !important
  }

  body {
    background: #fff;
    color: #000
  }
}