/*
 * cuebird.dev — 다크 프리미엄(research/ui-review/dark-premium-spec.md)을 웹사이트에 옮긴 스타일.
 * 90% 이상 무채색 + 에메랄드 하나. 시그니처: '청취 라인'(1px 에메랄드, 양끝 페이드)을 화면당 한 곳에만 쓴다.
 * 색 체계는 prefers-color-scheme을 따른다. 기본은 라이트, 다크는 미디어 쿼리.
 */

:root {
  color-scheme: light dark;

  --bg: #f6f6f7;
  --surface: #ffffff;
  --surface-2: rgb(23 23 27 / 0.03);
  --surface-3: rgb(23 23 27 / 0.06);
  --border: rgb(23 23 27 / 0.09);
  --border-strong: rgb(23 23 27 / 0.16);
  --text: #17171b;
  --text-2: #474751;
  --text-3: #5d5d68; /* 5.9:1 on --bg */
  --accent: #047857; /* 5.5:1 on white */
  --accent-strong: #065f46;
  --accent-soft: rgb(5 150 105 / 0.1);
  --on-accent: #ffffff;
  --accent-grad: linear-gradient(180deg, #047857 0%, #065f46 100%);
  --accent-grad-hover: linear-gradient(180deg, #065f46 0%, #064e3b 100%);
  --accent-btn-edge: inset 0 1px 0 rgb(255 255 255 / 0.18), inset 0 -1px 0 rgb(0 0 0 / 0.12), 0 1px 2px rgb(4 120 87 / 0.25);
  --now-line: linear-gradient(90deg, transparent 0%, rgb(4 120 87 / 0.75) 22%, #059669 50%, rgb(4 120 87 / 0.75) 78%, transparent 100%);
  --edge: inset 0 1px 0 rgb(255 255 255 / 0.7), inset 0 0 0 1px var(--border);
  --shadow-1: 0 1px 2px rgb(16 16 20 / 0.06);
  --shadow-2: 0 1px 2px rgb(16 16 20 / 0.06), 0 6px 16px -4px rgb(16 16 20 / 0.1);
  --shadow-3: 0 1px 2px rgb(16 16 20 / 0.06), 0 12px 28px -8px rgb(16 16 20 / 0.16), 0 32px 64px -24px rgb(16 16 20 / 0.18);
  --focus: 0 0 0 2px var(--bg), 0 0 0 4px var(--accent);
  --mark-ink: #1c1c1e;
  --mark-paper: #ffffff;
  --header-bg: rgb(246 246 247 / 0.82);

  --font: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Segoe UI', 'Malgun Gothic', 'Noto Sans KR', system-ui, sans-serif;
  --mono: ui-monospace, 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;

  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;
  --r-pill: 999px;

  --dur-1: 120ms;
  --dur-2: 180ms;
  --dur-enter: 280ms;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --press: 0.97;

  --gutter: 16px;
  --max: 1180px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0d;
    --surface: #131316;
    --surface-2: rgb(255 255 255 / 0.04);
    --surface-3: rgb(255 255 255 / 0.07);
    --border: rgb(255 255 255 / 0.08);
    --border-strong: rgb(255 255 255 / 0.15);
    --text: #f4f4f5;
    --text-2: #b9b9c2;
    --text-3: #93939e; /* 6.6:1 on --bg */
    --accent: #34d399;
    --accent-strong: #10b981;
    --accent-soft: rgb(52 211 153 / 0.12);
    --on-accent: #04130d;
    --accent-grad: linear-gradient(180deg, #34d399 0%, #10b981 100%);
    --accent-grad-hover: linear-gradient(180deg, #6ee7b7 0%, #34d399 100%);
    --accent-btn-edge: inset 0 1px 0 rgb(255 255 255 / 0.28), inset 0 -1px 0 rgb(0 0 0 / 0.12), 0 2px 10px -2px rgb(16 185 129 / 0.35);
    --now-line: linear-gradient(90deg, transparent 0%, rgb(52 211 153 / 0.9) 22%, #6ee7b7 50%, rgb(52 211 153 / 0.9) 78%, transparent 100%);
    --edge: inset 0 1px 0 rgb(255 255 255 / 0.06), inset 0 0 0 1px var(--border);
    --shadow-1: 0 1px 2px rgb(0 0 0 / 0.4);
    --shadow-2: 0 1px 2px rgb(0 0 0 / 0.35), 0 8px 20px -6px rgb(0 0 0 / 0.5);
    --shadow-3: 0 1px 2px rgb(0 0 0 / 0.4), 0 16px 36px -10px rgb(0 0 0 / 0.6), 0 40px 80px -30px rgb(0 0 0 / 0.7);
    --mark-ink: #f4f4f5;
    --mark-paper: #1c1c1e;
    --header-bg: rgb(11 11 13 / 0.78);
  }
}

@media (min-width: 720px) {
  :root { --gutter: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  :root { --dur-1: 0ms; --dur-2: 0ms; --dur-enter: 0ms; --press: 1; }
  html { scroll-behavior: auto !important; }
}

/* ---------- base ---------- */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

:lang(ko) body, body:lang(ko) { word-break: keep-all; overflow-wrap: anywhere; }

img { display: block; max-width: 100%; height: auto; }
svg { flex-shrink: 0; }

a { color: var(--accent); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--accent-strong); }
:focus-visible { outline: none; box-shadow: var(--focus); border-radius: var(--r-xs); }

h1, h2, h3 { margin: 0; font-weight: 700; line-height: 1.2; text-wrap: balance; }
h1 { letter-spacing: -0.03em; }
h2 { letter-spacing: -0.022em; }
h3 { letter-spacing: -0.012em; }
p { margin: 0; text-wrap: pretty; }

.wrap { width: 100%; max-width: calc(var(--max) + var(--gutter) * 2); margin-inline: auto; padding-inline: var(--gutter); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.num { font-variant-numeric: tabular-nums; }

.skip {
  position: absolute; left: 12px; top: -48px; z-index: 50;
  padding: 8px 14px; border-radius: var(--r-sm);
  background: var(--surface); color: var(--text);
  transition: top var(--dur-2) var(--ease-out);
}
.skip:focus-visible { top: 12px; box-shadow: var(--focus), var(--shadow-2); }

.icon { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
.icon-sm { width: 16px; height: 16px; }

kbd {
  display: inline-block; min-width: 1.6em; padding: 1px 6px;
  font: 600 12.5px/1.5 var(--mono); text-align: center;
  color: var(--text); background: var(--surface);
  border-radius: var(--r-xs);
  box-shadow: inset 0 0 0 1px var(--border-strong), inset 0 -1px 0 var(--border-strong);
}
code { font: 0.9em var(--mono); padding: 1px 5px; border-radius: var(--r-xs); background: var(--surface-3); overflow-wrap: anywhere; }
.doc > *, .install-grid > *, .row > *, .band-grid > *, .closer > *, .prose li { min-width: 0; }

/* ---------- mark ---------- */

.mark { width: 32px; height: 25px; }
.mark .ink { fill: var(--mark-ink); }
.mark .frame { fill: var(--mark-paper); stroke: var(--mark-ink); }
.mark .cue { fill: #34d399; }

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

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  backdrop-filter: blur(16px) saturate(150%);
  box-shadow: inset 0 -1px 0 var(--border);
}
@supports not (backdrop-filter: blur(1px)) { .site-header { background: var(--bg); } }

.header-row { display: flex; align-items: center; gap: 16px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 19px; letter-spacing: -0.035em; }
.brand:hover { color: var(--text); }

.nav { display: flex; align-items: center; gap: 2px; margin-left: 12px; }
.nav a {
  position: relative; padding: 6px 12px; border-radius: var(--r-sm);
  color: var(--text-2); text-decoration: none; font-size: 15px; font-weight: 500;
  transition: color var(--dur-1) var(--ease-out), background-color var(--dur-1) var(--ease-out);
}
.nav a:hover { color: var(--text); background: var(--surface-3); }
.nav a[aria-current='page'] { color: var(--text); }

.header-end { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.lang-link {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px; border-radius: var(--r-sm);
  color: var(--text-2); text-decoration: none; font-size: 14px; font-weight: 500;
  transition: color var(--dur-1) var(--ease-out), background-color var(--dur-1) var(--ease-out);
}
.lang-link:hover { color: var(--text); background: var(--surface-3); }

.menu { display: none; position: relative; }
.menu > summary {
  list-style: none; display: grid; place-items: center; width: 44px; height: 44px; border-radius: var(--r-md);
  color: var(--text); cursor: pointer;
}
.menu > summary::-webkit-details-marker { display: none; }
.menu > summary:hover { background: var(--surface-3); }
.menu-panel {
  position: absolute; right: 0; top: calc(100% + 8px); width: min(280px, calc(100vw - 32px));
  padding: 8px; border-radius: var(--r-lg); background: var(--surface);
  box-shadow: var(--edge), var(--shadow-3);
  display: grid; gap: 2px;
}
.menu-panel a { padding: 10px 12px; border-radius: var(--r-sm); color: var(--text); text-decoration: none; font-weight: 500; }
.menu-panel a:hover { background: var(--surface-3); }
.menu-panel a[aria-current='page'] { background: var(--accent-soft); }

@media (max-width: 879px) {
  .nav, .header-end .btn, .header-end .lang-link { display: none; }
  .menu { display: block; }
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 10px 18px; border: 0; border-radius: var(--r-md);
  font: 600 15.5px/1.2 var(--font); text-decoration: none; white-space: nowrap; cursor: pointer;
  transition: background-color var(--dur-1) var(--ease-out), box-shadow var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out), transform var(--dur-1) var(--ease-out);
}
.btn:active { transform: scale(var(--press)); }
.btn-primary { background: var(--accent) var(--accent-grad); color: var(--on-accent); box-shadow: var(--accent-btn-edge); }
.btn-primary:hover { background: var(--accent-strong) var(--accent-grad-hover); color: var(--on-accent); }
.btn-secondary { background: var(--surface); color: var(--text); box-shadow: var(--edge), var(--shadow-1); }
.btn-secondary:hover { background: var(--surface-3); color: var(--text); box-shadow: inset 0 0 0 1px var(--border-strong), var(--shadow-1); }
.btn-ghost { background: transparent; color: var(--text-2); }
.btn-ghost:hover { background: var(--surface-3); color: var(--text); }
.btn-sm { min-height: 38px; padding: 7px 14px; font-size: 14.5px; }
.btn:focus-visible { box-shadow: var(--focus); }
.btn[aria-disabled='true'], .btn:disabled { cursor: not-allowed; color: var(--text-3); background: var(--surface-3); box-shadow: none; transform: none; }

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

.hero { padding-top: clamp(56px, 12vh, 132px); }
.hero-copy { max-width: 760px; }
.hero h1 { font-size: clamp(36px, 5.6vw, 64px); line-height: 1.1; }
.hero .lede { margin-top: 20px; max-width: 34em; font-size: clamp(17px, 1.6vw, 19px); color: var(--text-2); }
.hero-ctas { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 10px; }
.trust { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 6px 18px; color: var(--text-3); font-size: 14px; }
.trust span { display: inline-flex; align-items: center; gap: 6px; }

.hero-stage { position: relative; margin-top: clamp(48px, 8vh, 80px); }
.frame {
  position: relative; overflow: hidden; border-radius: var(--r-xl) var(--r-xl) 0 0;
  background: var(--surface); box-shadow: var(--edge), var(--shadow-3);
}
.frame img { width: 100%; }
/* 시그니처: 청취 라인. 사이트 전체에서 히어로 프레임 한 곳에만 둔다. */
.frame.is-now::before {
  content: ''; position: absolute; inset: 0 0 auto; height: 1px; z-index: 2;
  background: var(--now-line);
}
.frame.is-now::after {
  content: ''; position: absolute; inset: 0 12% auto; height: 40px; z-index: 1; pointer-events: none;
  background: radial-gradient(60% 100% at 50% 0%, var(--accent-soft), transparent 70%);
}
.hero-shot { max-height: min(62vh, 640px); }
.hero-shot img { object-fit: cover; object-position: top left; height: 100%; }
.float-card {
  position: absolute; z-index: 3; right: clamp(12px, 4vw, 56px); bottom: clamp(-28px, -2vw, -12px);
  width: clamp(180px, 24vw, 290px); border-radius: var(--r-lg); overflow: hidden;
  box-shadow: var(--edge), var(--shadow-3);
}
.float-card figcaption { padding: 8px 12px; font-size: 13px; color: var(--text-3); background: var(--surface); }
@media (max-width: 639px) {
  .float-card { display: none; }
  .hero-shot { max-height: 300px; }
}

.stage-rule { height: 1px; background: var(--border); }

/* ---------- sections ---------- */

.section { padding-block: clamp(72px, 11vw, 136px); }
.section-tight { padding-block: clamp(56px, 8vw, 96px); }
.section-head { max-width: 680px; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 42px); }
.section-head p { margin-top: 14px; color: var(--text-2); font-size: 17.5px; }

/* 기능 줄: 비대칭 2열, 방향을 번갈아 */
.row { display: grid; gap: clamp(28px, 4vw, 64px); align-items: center; }
.row + .row { margin-top: clamp(72px, 9vw, 120px); }
@media (min-width: 900px) {
  .row { grid-template-columns: 5fr 7fr; }
  .row.flip { grid-template-columns: 7fr 5fr; }
  .row.flip .row-copy { order: 2; }
}
.row-copy h3 { font-size: clamp(24px, 2.6vw, 32px); }
.row-copy > p { margin-top: 14px; color: var(--text-2); font-size: 17px; }
.row-copy ul { margin: 22px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.row-copy li { display: flex; gap: 12px; align-items: flex-start; color: var(--text-2); }
.row-copy li .icon { margin-top: 3px; color: var(--text-3); }
.row-copy .more { display: inline-flex; align-items: center; gap: 6px; margin-top: 24px; font-weight: 600; text-decoration: none; }
.row-copy .more:hover { text-decoration: underline; }

.shot { margin: 0; border-radius: var(--r-lg); overflow: hidden; background: var(--surface); box-shadow: var(--edge), var(--shadow-2); }
.shot figcaption { padding: 10px 14px; font-size: 13.5px; color: var(--text-3); box-shadow: inset 0 1px 0 var(--border); }
.shot-pair { display: grid; grid-template-columns: 1.15fr 1fr; gap: 14px; align-items: start; }
.shot-pair .shot:last-child { margin-top: 36px; }
@media (max-width: 559px) { .shot-pair { grid-template-columns: 1fr; } .shot-pair .shot:last-child { margin-top: 0; } }

/* 숫자 모음: 크기가 다른 칸으로 */
.facts { display: grid; gap: 14px; margin-top: 48px; grid-template-columns: repeat(6, 1fr); }
.fact { grid-column: span 6; padding: 24px; border-radius: var(--r-lg); background: var(--surface); box-shadow: var(--edge), var(--shadow-1); display: flex; flex-direction: column; gap: 10px; }
.fact .big { font-size: clamp(36px, 4.4vw, 52px); font-weight: 700; letter-spacing: -0.04em; line-height: 1; font-variant-numeric: tabular-nums; }
.fact h3 { font-size: 18px; }
.fact p { color: var(--text-2); font-size: 15.5px; }
.fact .fact-shot { margin-top: auto; border-radius: var(--r-md); overflow: hidden; box-shadow: inset 0 0 0 1px var(--border); }
.fact-wide { display: grid; gap: 20px; align-items: center; }
.fact-wide > div:first-child { display: flex; flex-direction: column; gap: 10px; max-width: 34em; }
.fact-wide .fact-shot { margin-top: 0; justify-self: start; width: min(280px, 100%); border-radius: var(--r-md); }
@media (min-width: 720px) {
  .fact-wide { grid-template-columns: 1fr auto; padding-right: 32px; }
  .fact-wide .fact-shot { justify-self: end; }
  .fact.w2 { grid-column: span 2; }
  .fact.w3 { grid-column: span 3; }
  .fact.w4 { grid-column: span 4; }
}

/* 플랫폼 목록 */
.platforms { margin-top: 40px; display: grid; gap: 0; border-radius: var(--r-lg); background: var(--surface); box-shadow: var(--edge), var(--shadow-1); }
@media (min-width: 720px) { .platforms { grid-template-columns: 1fr 1fr; } }
.platform { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 14px 20px; box-shadow: inset 0 -1px 0 var(--border); }
.platform strong { font-weight: 600; }
.platform .status { font-size: 14px; color: var(--text-3); text-align: right; }
.platform .status.ok { color: var(--accent); }
.note { margin-top: 16px; color: var(--text-3); font-size: 14.5px; max-width: 70ch; }

/* 개인정보 띠 */
.band { background: var(--surface); box-shadow: inset 0 1px 0 var(--border), inset 0 -1px 0 var(--border); }
.band-grid { display: grid; gap: 40px; }
@media (min-width: 900px) { .band-grid { grid-template-columns: 4fr 7fr; gap: 72px; } }
.claims { margin: 0; padding: 0; list-style: none; display: grid; gap: 0; }
.claims li { display: grid; grid-template-columns: 28px 1fr; gap: 14px; padding: 18px 0; box-shadow: inset 0 -1px 0 var(--border); }
.claims li:first-child { padding-top: 0; }
.claims .icon { color: var(--text-3); margin-top: 3px; }
.claims strong { display: block; font-weight: 600; }
.claims span { color: var(--text-2); font-size: 15.5px; }

/* 마지막 행동 유도 */
.closer { text-align: left; display: grid; gap: 24px; align-items: end; }
@media (min-width: 900px) { .closer { grid-template-columns: 1fr auto; } }
.closer h2 { font-size: clamp(28px, 3.6vw, 42px); max-width: 18em; }
.closer p { margin-top: 12px; color: var(--text-2); }

/* ---------- docs layout (기능 안내·개인정보 등) ---------- */

.page-head { padding-top: clamp(48px, 9vh, 96px); padding-bottom: clamp(32px, 5vw, 56px); }
.page-head h1 { font-size: clamp(32px, 4.6vw, 52px); }
.page-head p { margin-top: 16px; max-width: 40em; color: var(--text-2); font-size: 18px; }
.page-head .meta { margin-top: 14px; font-size: 14px; color: var(--text-3); }

.doc { display: grid; gap: 40px; padding-bottom: clamp(72px, 10vw, 128px); }
@media (min-width: 1024px) { .doc { grid-template-columns: 220px minmax(0, 1fr); gap: 64px; } }
.toc { font-size: 14.5px; }
.toc h2 { font-size: 13px; font-weight: 600; color: var(--text-3); margin-bottom: 10px; letter-spacing: 0; }
.toc ol { margin: 0; padding: 0; list-style: none; display: grid; gap: 2px; }
.toc a { display: block; padding: 6px 10px; border-radius: var(--r-sm); color: var(--text-2); text-decoration: none; }
.toc a:hover { color: var(--text); background: var(--surface-3); }
@media (min-width: 1024px) { .toc nav { position: sticky; top: 88px; } }
@media (max-width: 1023px) {
  .toc ol { display: flex; flex-wrap: wrap; gap: 6px; }
  .toc a { padding: 6px 12px; border-radius: var(--r-pill); box-shadow: inset 0 0 0 1px var(--border); }
}

.prose { max-width: 760px; }
.prose > section + section { margin-top: clamp(64px, 8vw, 96px); padding-top: clamp(40px, 5vw, 56px); box-shadow: inset 0 1px 0 var(--border); }
.prose h2 { font-size: clamp(24px, 2.8vw, 32px); display: flex; align-items: center; gap: 12px; }
.prose h2 .icon { width: 24px; height: 24px; color: var(--text-3); }
.prose h3 { font-size: 19px; margin-top: 36px; }
.prose p, .prose li { color: var(--text-2); }
.prose p { margin-top: 14px; }
.prose ul, .prose ol { margin: 14px 0 0; padding-left: 1.3em; display: grid; gap: 8px; }
.prose strong { color: var(--text); font-weight: 600; }
.prose .shot { margin-top: 28px; }
.prose .lead { font-size: 17.5px; }

.steps { counter-reset: step; list-style: none; padding: 0 !important; margin-top: 24px !important; display: grid; gap: 0 !important; }
.steps li { counter-increment: step; position: relative; padding: 0 0 20px 44px; }
.steps li::before {
  content: counter(step); position: absolute; left: 0; top: 0; width: 28px; height: 28px; border-radius: 50%;
  display: grid; place-items: center; font: 600 14px/1 var(--font); font-variant-numeric: tabular-nums;
  color: var(--text); background: var(--surface); box-shadow: inset 0 0 0 1px var(--border-strong);
}
.steps li:not(:last-child)::after { content: ''; position: absolute; left: 13.5px; top: 32px; bottom: 4px; width: 1px; background: var(--border); }

.callout { margin-top: 24px; padding: 16px 18px; border-radius: var(--r-md); background: var(--surface-2); box-shadow: inset 0 0 0 1px var(--border); color: var(--text-2); font-size: 15.5px; display: grid; grid-template-columns: 20px 1fr; gap: 12px; }
.callout .icon { color: var(--text-3); margin-top: 2px; }
.callout p { margin: 0; }

.table-wrap { margin-top: 20px; overflow-x: auto; border-radius: var(--r-md); box-shadow: inset 0 0 0 1px var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
caption { text-align: left; padding: 12px 16px 0; color: var(--text-3); font-size: 14px; caption-side: top; }
th, td { padding: 11px 16px; text-align: left; vertical-align: top; box-shadow: inset 0 -1px 0 var(--border); }
thead th { font-size: 13.5px; font-weight: 600; color: var(--text-3); }
tbody th { font-weight: 500; color: var(--text); min-width: 6.5em; }
.shot.narrow { max-width: 420px; }
td { color: var(--text-2); }
tbody tr:last-child th, tbody tr:last-child td { box-shadow: none; }
td.keys kbd { white-space: nowrap; }
.table-wrap:focus-visible, pre:focus-visible { box-shadow: var(--focus); }

/* FAQ */
.faq { display: grid; gap: 0; }
.faq-group { max-width: 820px; }
.faq-group + .faq-group { margin-top: 48px; }
.faq-group > h2 { font-size: 20px; margin-bottom: 8px; }
.faq details { box-shadow: inset 0 -1px 0 var(--border); }
.faq summary {
  list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 18px 0; font-weight: 600; font-size: 17px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .icon { color: var(--text-3); transition: transform var(--dur-2) var(--ease-out); }
.faq details[open] summary .icon { transform: rotate(45deg); }
.faq summary:focus-visible { border-radius: var(--r-xs); }
.faq .answer { padding: 0 0 20px; color: var(--text-2); max-width: 68ch; }
.faq .answer p + p { margin-top: 10px; }

/* 설치 */
.install-grid { display: grid; gap: 20px; padding-bottom: clamp(72px, 10vw, 128px); }
@media (min-width: 960px) { .install-grid { grid-template-columns: 5fr 7fr; align-items: start; } }
.panel { padding: clamp(22px, 3vw, 32px); border-radius: var(--r-lg); background: var(--surface); box-shadow: var(--edge), var(--shadow-1); }
.panel h2 { font-size: 22px; }
.panel > p { margin-top: 10px; color: var(--text-2); }
.panel .btn { margin-top: 22px; }
.panel .small { margin-top: 12px; font-size: 14px; color: var(--text-3); }
pre {
  margin: 14px 0 0; padding: 14px 16px; overflow-x: auto; border-radius: var(--r-md);
  background: var(--surface-2); box-shadow: inset 0 0 0 1px var(--border);
  font: 13.5px/1.6 var(--mono); color: var(--text);
}
pre code { padding: 0; background: none; font-size: inherit; }

/* 변경 이력 */
.log { display: grid; gap: 0; padding-bottom: clamp(72px, 10vw, 128px); }
.log article { max-width: 880px; display: grid; gap: 8px; padding: 28px 0; box-shadow: inset 0 -1px 0 var(--border); }
@media (min-width: 720px) { .log article { grid-template-columns: 160px 1fr; gap: 32px; } }
.log time { color: var(--text-3); font-size: 14.5px; font-variant-numeric: tabular-nums; }
.log h2 { font-size: 19px; }
.log ul { margin: 10px 0 0; padding-left: 1.2em; color: var(--text-2); display: grid; gap: 6px; }

/* ---------- footer ---------- */

.site-footer { box-shadow: inset 0 1px 0 var(--border); padding-block: 48px 40px; color: var(--text-3); font-size: 14.5px; }
.footer-grid { display: grid; gap: 32px; }
@media (min-width: 800px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr; } }
.footer-grid h2 { font-size: 13.5px; font-weight: 600; color: var(--text-2); margin-bottom: 10px; letter-spacing: 0; }
.footer-grid ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.footer-grid a { color: var(--text-3); text-decoration: none; }
.footer-grid a:hover { color: var(--text); text-decoration: underline; }
.footer-about p { margin-top: 12px; max-width: 42ch; }
.footer-legal { margin-top: 36px; font-size: 13.5px; max-width: 80ch; }

/* ---------- 홈: 지원 사이트 줄 ---------- */
.where { padding-block: clamp(40px, 6vw, 64px) 0; }
.kicker { font-size: 14px; font-weight: 600; color: var(--text-3); letter-spacing: 0; }
.chips { margin: 14px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.chips li {
  padding: 6px 12px; border-radius: var(--r-pill); font-size: 15px; font-weight: 500; color: var(--text);
  background: var(--surface); box-shadow: inset 0 0 0 1px var(--border);
}

/* ---------- 홈: 데모(장면 4개를 차례로) ----------
 * 스크립트 없이 CSS 애니메이션만 쓴다. 한 장면 5초, 한 바퀴 20초.
 * 멈춤: 체크박스(라벨 단추), 마우스를 올리거나 포커스가 들어와도 멈춘다(WCAG 2.2.2).
 * 동작 줄이기 설정이면 애니메이션 대신 네 장면을 모두 펼쳐 보인다. */
.demo { margin-top: 40px; display: grid; gap: 20px; }
.demo-pause { position: absolute; opacity: 0; width: 1px; height: 1px; pointer-events: none; }
.demo-steps { margin: 0; padding: 0; list-style: none; display: grid; gap: 4px; counter-reset: demo; }
@media (min-width: 720px) { .demo-steps { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1080px) { .demo-steps { grid-template-columns: repeat(4, 1fr); } }
.demo-steps li {
  counter-increment: demo; position: relative; padding: 14px 16px 14px 56px; border-radius: var(--r-md);
  color: var(--text-2); font-size: 15.5px;
}
.demo-steps li::before {
  content: counter(demo); position: absolute; left: 16px; top: 14px; width: 26px; height: 26px; border-radius: 50%;
  display: grid; place-items: center; font: 600 13.5px/1 var(--font); font-variant-numeric: tabular-nums;
  color: var(--text); box-shadow: inset 0 0 0 1px var(--border-strong); background: var(--surface);
}
.demo-steps strong { display: block; color: var(--text); font-weight: 600; font-size: 17px; margin-bottom: 2px; }
.demo-stage {
  position: relative; margin: 0; aspect-ratio: 8 / 3; border-radius: var(--r-lg); overflow: hidden;
  background: var(--surface); box-shadow: var(--edge), var(--shadow-3);
}
.demo-frame { margin: 0; position: absolute; inset: 0; }
.demo-frame img { width: 100%; height: 100%; object-fit: cover; }
/* 좁은 화면: 8:3 그대로면 글자가 너무 작아져서, 장면의 왼쪽·가운데(영상과 팝업)를 크게 보인다. */
@media (max-width: 719px) {
  .demo-stage { aspect-ratio: 16 / 10; }
  .demo-frame img { object-position: 30% 50%; }
}
.demo-toggle {
  justify-self: start; display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 8px 14px;
  border-radius: var(--r-md); color: var(--text-2); font-size: 14.5px; font-weight: 500; cursor: pointer;
  transition: background-color var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}
.demo-toggle:hover { background: var(--surface-3); color: var(--text); }
.demo-pause:focus-visible ~ .demo-toggle { box-shadow: var(--focus); }
.demo-toggle .when-running, .demo-toggle .when-paused { display: inline-flex; align-items: center; gap: 8px; }
.demo-toggle .when-paused, .demo-pause:checked ~ .demo-toggle .when-running { display: none; }
.demo-pause:checked ~ .demo-toggle .when-paused { display: inline-flex; }

@media (prefers-reduced-motion: no-preference) {
  .demo-frame { opacity: 0; animation: demo-frame 20s linear infinite; }
  .demo-steps li { animation: demo-step 20s linear infinite; }
  .demo-steps li::before { animation: demo-dot 20s linear infinite; }
  .demo-frame:nth-child(2), .demo-steps li:nth-child(2), .demo-steps li:nth-child(2)::before { animation-delay: 5s; }
  .demo-frame:nth-child(3), .demo-steps li:nth-child(3), .demo-steps li:nth-child(3)::before { animation-delay: 10s; }
  .demo-frame:nth-child(4), .demo-steps li:nth-child(4), .demo-steps li:nth-child(4)::before { animation-delay: 15s; }
  .demo:is(:hover, :focus-within, :has(.demo-pause:checked)) .demo-frame,
  .demo:is(:hover, :focus-within, :has(.demo-pause:checked)) .demo-steps li,
  .demo:is(:hover, :focus-within, :has(.demo-pause:checked)) .demo-steps li::before { animation-play-state: paused; }
  /* 첫 장면은 애니메이션 시작 전에도 보이게(지연 0). */
  .demo-frame:first-child { opacity: 1; }
}
@keyframes demo-frame { 0% { opacity: 0; } 1.5%, 25% { opacity: 1; } 26.5%, 100% { opacity: 0; } }
@keyframes demo-step { 0%, 25.5% { background: var(--surface); box-shadow: var(--edge), var(--shadow-1); color: var(--text-2); } 26%, 100% { background: transparent; box-shadow: none; } }
@keyframes demo-dot { 0%, 25.5% { background: var(--accent); color: var(--on-accent); box-shadow: none; } 26%, 100% { background: var(--surface); color: var(--text); } }

@media (prefers-reduced-motion: reduce) {
  .demo-toggle { display: none; }
  .demo-stage { aspect-ratio: auto; display: grid; gap: 10px; grid-template-columns: 1fr 1fr; background: none; box-shadow: none; overflow: visible; border-radius: 0; }
  .demo-frame { position: static; border-radius: var(--r-md); overflow: hidden; box-shadow: var(--edge), var(--shadow-1); }
}

/* 기능 줄 보조 */
.row.first { margin-top: 48px; }
.row-copy .tags { margin: 18px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 6px; }
.row-copy .tags li { display: inline-block; padding: 4px 10px; border-radius: var(--r-pill); font-size: 14px; color: var(--text-2); box-shadow: inset 0 0 0 1px var(--border); }
.row-copy .small { margin-top: 14px; color: var(--text-3); font-size: 14.5px; }
.row > .shot { justify-self: center; width: 100%; }
.row > .shot img { width: 100%; }

/* 비교표 */
.compare { margin-top: 36px; background: var(--surface); }
.compare table { table-layout: fixed; }
.compare th:first-child { width: 31%; }
@media (max-width: 559px) { .compare th, .compare td { padding: 10px 8px; font-size: 13.5px; } .compare caption { padding-inline: 8px; } }
.compare thead th:last-child, .compare td.ours { color: var(--text); font-weight: 600; }
.compare td.ours { background: var(--accent-soft); }
.compare thead th:last-child { color: var(--accent); }

/* 요금 */
.plans { margin-top: 40px; display: grid; gap: 14px; }
@media (min-width: 880px) { .plans { grid-template-columns: repeat(3, 1fr); } }
.plan { padding: 24px; border-radius: var(--r-lg); background: var(--surface); box-shadow: var(--edge), var(--shadow-1); }
.plan h3 { font-size: 19px; display: flex; align-items: center; gap: 8px; }
.plan-price { margin-top: 8px; font-size: 26px; font-weight: 700; letter-spacing: -0.02em; }
.plan-price span { display: block; margin-top: 2px; font-size: 14px; font-weight: 500; letter-spacing: 0; color: var(--text-3); }
.plan ul { margin: 18px 0 0; padding: 18px 0 0; list-style: none; display: grid; gap: 10px; box-shadow: inset 0 1px 0 var(--border); }
.plan li { display: grid; grid-template-columns: 16px 1fr; gap: 10px; color: var(--text-2); font-size: 15px; }
.plan li .icon { margin-top: 4px; color: var(--accent); }
.plan-next { background: var(--surface-2); box-shadow: inset 0 0 0 1px var(--border); }
.plan-next li .icon { color: var(--text-3); }
.badge { display: inline-block; padding: 2px 8px; border-radius: var(--r-pill); font-size: 12.5px; font-weight: 600; color: var(--text-2); box-shadow: inset 0 0 0 1px var(--border-strong); }

/* 홈 FAQ */
.qa { display: grid; gap: 24px; }
@media (min-width: 960px) { .qa { grid-template-columns: 4fr 7fr; gap: 72px; align-items: start; } }
.band .more { display: inline-flex; align-items: center; gap: 6px; margin-top: 20px; font-weight: 600; text-decoration: none; }
.band .more:hover { text-decoration: underline; }
.closer-band { box-shadow: inset 0 1px 0 var(--border); }

/* 설치·문서 보조 */
.install-side { display: grid; gap: 20px; }
.prose-wide { max-width: none; }
.faq-page { padding-bottom: clamp(72px, 10vw, 128px); }
.page-head-404 { padding-bottom: clamp(96px, 14vw, 160px); }

/* ---------- 등장 모션(한 번, 짧게) ---------- */
@media (prefers-reduced-motion: no-preference) {
  .hero-copy, .hero-stage { animation: rise var(--dur-enter) var(--ease-out) both; }
  .hero-stage { animation-delay: 60ms; }
}
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }