/* SeanPrep 이용 안내서·운영 안내서 공용(두 저장소에 같은 파일을 둔다). 값은 seanprep-ui/src/tokens.css·motion.css 와 같게 둔다(「채점된 시험지」).
   따로 배포하는 안내 사이트라 랜딩 규칙을 따른다: 카드 기울기·고정 스크롤 허용. */
:root {
  --background: #f5f2eb;
  --foreground: #0b2545;
  --card: #fffdf8;
  --primary: #0b2545;
  --primary-foreground: #f5f2eb;
  --secondary: #ece7dc;
  --muted-foreground: rgba(11, 37, 69, 0.62);
  --accent: rgba(11, 37, 69, 0.06);
  --border: #d9d4c5;
  --ring: #1f4fbf;
  --grading: #d7262b;
  --highlight: #ffe77a;
  --student: #1f4fbf;
  --tape: rgba(255, 214, 102, 0.82);
  --sheet-shadow: 7px 7px 0 rgba(11, 37, 69, 0.13);
  --sheet-shadow-sm: 4px 4px 0 rgba(11, 37, 69, 0.1);
  --ease-pen: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-stamp: cubic-bezier(0.3, 1.6, 0.5, 1);
  --font-sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", sans-serif;
  --font-serif: "Libre Caslon Text", Georgia, serif;
  --font-pen: "Nanum Pen Script", cursive;
  --wrap: 1200px;
  --gutter: 32px;
  --header: 64px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header) + 16px);
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: -0.02em;
  word-break: keep-all;
  overflow-x: hidden;
}
img,
svg {
  display: block;
  max-width: 100%;
}
a {
  color: inherit;
}
:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 3px;
  border-radius: 4px;
}
.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.serif {
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: 0;
  font-variant-numeric: tabular-nums;
}
.pen {
  font-family: var(--font-pen);
  color: var(--grading);
  letter-spacing: 0;
  line-height: 1.15;
}
.muted {
  color: var(--muted-foreground);
}

/* ───────── 머리 ───────── */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header);
  background: rgba(245, 242, 235, 0.94);
  border-bottom: 1.5px solid var(--primary);
  animation: drop-in 620ms var(--ease-pen) both;
}
.site-header .wrap {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.logo img {
  width: 34px;
  height: 34px;
}
.logo b {
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.02;
  letter-spacing: 0.06em;
}
.header-chip {
  font-size: 13px;
  font-weight: 700;
  padding: 3px 10px;
  border: 1.5px solid var(--primary);
  border-radius: 999px;
  background: var(--card);
}
.header-spacer {
  flex: 1;
}
.header-link {
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  padding: 9px 16px;
  border-radius: 10px;
  background: var(--primary);
  color: var(--primary-foreground);
  transition:
    translate 150ms var(--ease-pen),
    box-shadow 150ms var(--ease-pen);
}
.header-link:hover {
  translate: 0 -2px;
  box-shadow: 3px 3px 0 var(--grading);
}
/* 읽은 만큼 그어지는 잉크 줄 */
.ink-progress {
  position: absolute;
  left: 0;
  bottom: -3px;
  height: 3px;
  width: 100%;
  background: var(--primary);
  transform-origin: left;
  transform: scaleX(var(--p, 0));
  border-radius: 0 3px 3px 0;
}

/* ───────── 버튼 ───────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: inherit;
  font-weight: 700;
  font-size: 17px;
  padding: 16px 26px;
  border-radius: 12px;
  border: 1.5px solid var(--primary);
  background: var(--primary);
  color: var(--primary-foreground);
  text-decoration: none;
  cursor: pointer;
  transition:
    translate 150ms var(--ease-pen),
    box-shadow 150ms var(--ease-pen);
}
.btn:hover {
  translate: 0 -2px;
  box-shadow: 4px 4px 0 var(--grading);
}
.btn:active {
  translate: 0 0;
  box-shadow: none;
}
.btn.outline {
  background: var(--card);
  color: var(--foreground);
}
.btn.outline:hover {
  box-shadow: 4px 4px 0 var(--primary);
}
.btn .arrow {
  transition: translate 150ms var(--ease-pen);
}
.btn:hover .arrow {
  translate: 4px 0;
}

/* ───────── 공통 조각 ───────── */
.sheet {
  background: var(--card);
  border: 1.5px solid var(--primary);
  border-radius: 6px;
  box-shadow: var(--sheet-shadow);
}
.tape::before {
  content: "";
  position: absolute;
  top: -13px;
  left: 50%;
  width: 92px;
  height: 26px;
  translate: -50% 0;
  rotate: -2deg;
  background: var(--tape);
  z-index: 2;
}
.mark {
  background: linear-gradient(var(--highlight), var(--highlight)) no-repeat 0 88% / 0% 42%;
  padding: 0 0.08em;
  transition: background-size 900ms var(--ease-pen) 250ms;
}
.in .mark,
.mark.in {
  background-size: 100% 42%;
}
.role {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  padding: 5px 9px;
  border-radius: 999px;
  border: 1.5px solid currentColor;
  white-space: nowrap;
}
.role.parent {
  color: var(--primary);
}
.role.student {
  color: var(--student);
}
.role.both {
  color: var(--primary);
  background: var(--highlight);
  border-color: var(--primary);
}
.role::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.role.both::before {
  display: none;
}
.eyebrow {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--muted-foreground);
}
.h-xl {
  font-size: clamp(40px, 7.4vw, 96px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.05em;
  margin: 0;
}
.h-lg {
  font-size: clamp(32px, 5vw, 60px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.05em;
  margin: 0;
}
.h-md {
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.04em;
  margin: 0;
}
.lead {
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--muted-foreground);
  max-width: 720px;
}
.lead strong {
  color: var(--foreground);
}
.section {
  padding: clamp(80px, 11vw, 150px) 0;
  position: relative;
}
.section.alt {
  background: var(--secondary);
}
.section.sheetbg {
  background: var(--card);
}

/* 스크롤로 보일 때 떠오르기. js 가 없으면 처음부터 보인다 */
.js [data-reveal] {
  opacity: 0;
  translate: 0 28px;
  transition:
    opacity 620ms var(--ease-pen),
    translate 620ms var(--ease-pen),
    rotate 620ms var(--ease-pen);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.js [data-reveal].in {
  opacity: 1;
  translate: 0 0;
}
/* 다 나타난 뒤에는 마우스 반응만 빠르게 */
.js [data-reveal].done {
  transition:
    translate 180ms var(--ease-pen),
    box-shadow 180ms var(--ease-pen),
    rotate 620ms var(--ease-pen);
  transition-delay: 0ms;
}
@media (hover: hover) and (pointer: fine) {
  .js .lift.done:hover,
  .js .who-card.done:hover {
    translate: -2px -2px;
    box-shadow: 9px 9px 0 rgba(11, 37, 69, 0.16);
  }
}
.js .lift.done:active,
.js .who-card.done:active {
  translate: 1px 1px;
  box-shadow: 3px 3px 0 rgba(11, 37, 69, 0.12);
}
.js [data-reveal="place"] {
  rotate: -2deg;
  translate: 0 36px;
}
.js [data-reveal="place"].in {
  rotate: var(--tilt, 0deg);
  translate: 0 0;
}

/* 빨간 펜·잉크 선 긋기: path 에 pathLength="1" */
.draw path,
.draw line,
.draw polyline {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  opacity: 0;
  transition:
    stroke-dashoffset 900ms var(--ease-pen),
    opacity 1ms linear;
  transition-delay: var(--d, 0ms);
}
.in .draw path,
.in .draw line,
.in .draw polyline,
.draw.in path {
  stroke-dashoffset: 0;
  opacity: 1;
}

/* ───────── 표지 ───────── */
.hero {
  position: relative;
  padding: calc(var(--header) + clamp(56px, 9vw, 120px)) 0 clamp(72px, 9vw, 120px);
  background-color: var(--background);
  background-image:
    linear-gradient(rgba(11, 37, 69, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 37, 69, 0.055) 1px, transparent 1px);
  background-size: 24px 24px;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 48px;
  align-items: center;
}
.hero-title {
  position: relative;
}
.hero-title .word {
  display: inline-block;
  animation: word-rise 760ms var(--ease-pen) both;
  animation-delay: calc(200ms + var(--i) * 90ms);
}
.circle-wrap {
  position: relative;
  display: inline-block;
}
.crayon {
  position: absolute;
  inset: -22% -18% -26% -20%;
  width: 138%;
  height: 148%;
  pointer-events: none;
  overflow: visible;
}
.crayon path {
  fill: none;
  stroke: var(--grading);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: draw 1100ms var(--ease-pen) 900ms forwards;
  filter: url(#crayon);
}
.crayon path + path {
  stroke-width: 2.4;
  opacity: 0.55;
  animation-delay: 1250ms;
}
.hero-pen {
  margin: 28px 0 0;
  font-size: clamp(30px, 3.6vw, 46px);
  rotate: -2deg;
  transform-origin: left;
  clip-path: inset(0 100% 0 0);
  animation: wipe 1300ms var(--ease-pen) 1700ms forwards;
}
.hero-lead {
  margin: 28px 0 36px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  animation: word-rise 700ms var(--ease-pen) 1100ms both;
}

/* 표지 오른쪽: 안내서 낱장 세 장 */
.paper-stack {
  position: relative;
  height: 520px;
}
.leaf {
  position: absolute;
  width: 280px;
  padding: 26px 24px 24px;
  animation:
    leaf-drop 900ms var(--ease-pen) both,
    leaf-float 7s ease-in-out infinite;
  animation-delay: calc(500ms + var(--i) * 160ms), calc(1600ms + var(--i) * 700ms);
}
.leaf:nth-child(1) {
  --r: -6deg;
  left: 0;
  top: 70px;
  --i: 0;
}
.leaf:nth-child(2) {
  --r: 3deg;
  left: 34%;
  top: 0;
  --i: 1;
}
.leaf:nth-child(3) {
  --r: 7deg;
  left: 22%;
  top: 230px;
  --i: 2;
  z-index: 3;
}
.leaf {
  rotate: var(--r);
}
.leaf .num {
  font-size: 44px;
  line-height: 1;
}
.leaf h3 {
  margin: 8px 0 14px;
  font-size: 19px;
  font-weight: 900;
  line-height: 1.3;
}
.leaf .mini {
  height: 92px;
  border-radius: 6px;
  background: var(--background);
  border: 1px dashed var(--border);
  display: grid;
  place-items: center;
}
.leaf .role {
  margin-top: 14px;
}

/* 누구세요? */
.who {
  margin-top: clamp(64px, 8vw, 104px);
  display: grid;
  grid-template-columns: auto 1fr 1fr;
  gap: 20px;
  align-items: stretch;
}
.who-q {
  align-self: center;
  font-size: clamp(36px, 4vw, 52px);
  rotate: -4deg;
  padding-right: 12px;
}
.who-card {
  position: relative;
  display: block;
  padding: 26px 26px 22px;
  text-decoration: none;
  transition:
    translate 180ms var(--ease-pen),
    box-shadow 180ms var(--ease-pen);
}
@media (hover: hover) and (pointer: fine) {
  .who-card:hover,
  .lift:hover {
    translate: -2px -2px;
    box-shadow: 9px 9px 0 rgba(11, 37, 69, 0.16);
  }
}
.who-card:active,
.lift:active {
  translate: 1px 1px;
  box-shadow: 3px 3px 0 rgba(11, 37, 69, 0.12);
}
.lift {
  transition:
    translate 180ms var(--ease-pen),
    box-shadow 180ms var(--ease-pen);
}
.who-card h3 {
  margin: 10px 0 6px;
  font-size: 24px;
  font-weight: 900;
}
.who-card p {
  margin: 0;
  font-size: 14px;
  color: var(--muted-foreground);
}
.who-card .go {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--primary);
  display: grid;
  place-items: center;
  transition:
    background 180ms var(--ease-pen),
    color 180ms var(--ease-pen),
    rotate 180ms var(--ease-pen);
}
.who-card:hover .go {
  background: var(--primary);
  color: var(--primary-foreground);
  rotate: -45deg;
}

/* 흐르는 날짜 띠 */
.ticker {
  background: var(--primary);
  color: var(--primary-foreground);
  overflow: hidden;
  border-block: 1.5px solid var(--primary);
}
.ticker-track {
  display: flex;
  width: max-content;
  animation: ticker 38s linear infinite;
}
.ticker:hover .ticker-track {
  animation-play-state: paused;
}
.ticker-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 34px;
  white-space: nowrap;
  font-weight: 700;
}
.ticker-item .serif {
  font-size: 22px;
  color: var(--highlight);
}
.ticker-item::after {
  content: "✓";
  margin-left: 22px;
  color: rgba(245, 242, 235, 0.35);
}

/* ───────── 차례 ───────── */
.toc-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  flex-wrap: wrap;
}
.toc {
  list-style: none;
  margin: 56px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 56px;
  border-top: 1.5px solid var(--primary);
}
.toc li {
  border-bottom: 1px dashed var(--border);
}
.toc a,
.toc .row {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 18px 4px;
  text-decoration: none;
}
.toc .n {
  font-size: 26px;
  line-height: 1;
}
.toc .t {
  font-weight: 800;
  font-size: 17px;
  line-height: 1.35;
}
.toc .row {
  opacity: 0.45;
}
.toc .soon {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted-foreground);
}
.toc a {
  position: relative;
  border-radius: 6px;
  transition: background 180ms var(--ease-pen);
}
.toc a:hover {
  background: var(--accent);
}
.toc a .t::after {
  content: " →";
  display: inline-block;
  transition: translate 180ms var(--ease-pen);
}
.toc a:hover .t::after {
  translate: 6px 0;
}
.sample-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  padding: 3px 8px;
  background: var(--highlight);
  border-radius: 4px;
  rotate: -3deg;
}

/* ───────── 장 머리(네이비 역상) ───────── */
.chapter-open {
  background: var(--primary);
  color: var(--primary-foreground);
  padding: clamp(96px, 12vw, 170px) 0 clamp(80px, 10vw, 140px);
  position: relative;
  overflow: hidden;
}
.chapter-open .eyebrow {
  color: rgba(245, 242, 235, 0.6);
}
.chapter-num {
  width: clamp(200px, 30vw, 380px);
  height: auto;
  margin: 8px 0 24px -6px;
  overflow: visible;
}
.chapter-num text {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 220px;
  fill: transparent;
  stroke: var(--primary-foreground);
  stroke-width: 1.6;
  stroke-dasharray: 1200;
  stroke-dashoffset: 1200;
  transition:
    stroke-dashoffset 2200ms var(--ease-pen),
    fill 900ms var(--ease-pen) 1500ms;
}
.chapter-open.in .chapter-num text {
  stroke-dashoffset: 0;
  fill: rgba(245, 242, 235, 0.08);
}
.chapter-open .h-lg {
  max-width: 900px;
}
/* 네이비 바탕: 형광펜이 그어지면서 글자가 네이비로 바뀐다(긋기 전엔 페이퍼 글자) */
.chapter-open .mark {
  color: inherit;
  /* 네이비 바탕에서는 글자 전체 높이를 칠한다(아래만 칠하면 윗부분이 네이비 위 네이비로 사라진다) */
  background-position: 0 50%;
  background-size: 0% 100%;
  padding: 0 0.12em;
  border-radius: 3px;
  transition:
    background-size 900ms var(--ease-pen) 250ms,
    color 250ms var(--ease-pen) 850ms;
}
.chapter-open.in .mark {
  background-size: 100% 100%;
}
.chapter-open.in .mark {
  color: var(--primary);
}
.chapter-open .lead {
  color: rgba(245, 242, 235, 0.72);
  margin-top: 26px;
}
.chapter-open .lead strong {
  color: var(--primary-foreground);
}
.chapter-open .roles {
  display: flex;
  gap: 8px;
  margin-top: 28px;
}
.chapter-open .role.parent,
.chapter-open .role.student {
  color: var(--primary-foreground);
}
.chapter-open .bg-link {
  position: absolute;
  right: -40px;
  top: 50%;
  width: min(560px, 50vw);
  translate: 0 -50%;
  opacity: 0.16;
  pointer-events: none;
}
.chapter-open .bg-link path {
  fill: none;
  stroke: var(--primary-foreground);
  stroke-width: 14;
  stroke-linecap: round;
}

/* 숫자 네 칸 */
.facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1.5px solid var(--primary);
}
.fact {
  padding: 34px 24px 30px;
  border-right: 1px dashed var(--border);
}
.fact:last-child {
  border-right: 0;
}
.fact .v {
  font-size: clamp(48px, 6vw, 76px);
  line-height: 1;
}
.fact .v small {
  font-family: var(--font-sans);
  font-size: 0.32em;
  font-weight: 800;
  margin-left: 4px;
}
.fact .k {
  margin-top: 12px;
  font-weight: 800;
}
.fact .d {
  font-size: 14px;
  color: var(--muted-foreground);
}

/* 왜 연결하나요 */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 56px;
}
.persona {
  position: relative;
  padding: 34px 32px 30px;
}
.persona header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 18px;
  background: var(--card);
}
.avatar.parent {
  color: var(--primary);
}
.avatar.student {
  color: var(--student);
}
.checks {
  list-style: none;
  margin: 0;
  padding: 0;
}
.checks li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  padding: 11px 0;
  border-top: 1px dashed var(--border);
}
.checks svg {
  width: 22px;
  height: 22px;
  margin-top: 2px;
  overflow: visible;
}
.checks path {
  fill: none;
  stroke: var(--primary);
  stroke-width: 2.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.checks .no path {
  stroke: var(--muted-foreground);
}
.checks .no span {
  color: var(--muted-foreground);
}

/* 고객 말 → 답 */
.ask {
  margin-top: 40px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  gap: 28px;
  align-items: center;
  padding: 30px 32px;
  border-radius: 6px;
  border: 1.5px dashed var(--primary);
}
.ask .who-said {
  font-size: 12px;
  font-weight: 800;
  color: var(--muted-foreground);
}
.ask q {
  display: block;
  font-size: 20px;
  font-weight: 800;
  color: var(--student);
  quotes: "“" "”";
}
.ask q.parent {
  color: var(--primary);
}
.ask .ans {
  font-size: 16px;
}

/* ───────── 따라가기(고정 무대) ───────── */
.story {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  gap: 56px;
  margin-top: 64px;
}
.stage-col {
  position: relative;
}
.stage {
  position: sticky;
  top: calc(var(--header) + 32px);
  container-type: inline-size;
}
.stage-box {
  position: relative;
  width: 100%;
  aspect-ratio: 640 / 470;
}
.stage-inner {
  position: absolute;
  left: 0;
  top: 0;
  width: 640px;
  height: 470px;
  transform-origin: 0 0;
  transition: transform 750ms var(--ease-pen);
}
.stage-dots {
  display: flex;
  gap: 8px;
  margin-top: 18px;
  justify-content: center;
}
.stage-caption {
  display: none;
}
.stage-dots span {
  width: 34px;
  height: 4px;
  border-radius: 4px;
  background: var(--border);
  overflow: hidden;
  position: relative;
}
.stage-dots span::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 500ms var(--ease-pen);
}
.stage[data-step="1"] .stage-dots span:nth-child(-n + 1)::after,
.stage[data-step="2"] .stage-dots span:nth-child(-n + 2)::after,
.stage[data-step="3"] .stage-dots span:nth-child(-n + 3)::after,
.stage[data-step="4"] .stage-dots span:nth-child(-n + 4)::after {
  transform: scaleX(1);
}

/* 무대 속 창: 부모님 PC */
.win {
  position: absolute;
  left: 0;
  top: 40px;
  width: 392px;
  height: 352px;
  overflow: hidden;
}
.win-bar {
  height: 34px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 12px;
  border-bottom: 1.5px solid var(--primary);
  background: var(--secondary);
  font-size: 11px;
  font-weight: 700;
}
.win-bar i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--border);
}
.win-bar span {
  margin-left: 8px;
  color: var(--muted-foreground);
}
.win-body {
  position: absolute;
  inset: 34px 0 0;
  font-size: 12.5px;
}
.at {
  position: absolute;
  margin: 0;
}
.ui-crumb {
  font-size: 11px;
  color: var(--muted-foreground);
}
.ui-h {
  font-size: 18px;
  font-weight: 900;
  margin: 2px 0 12px;
}
.ui-tabs {
  display: flex;
  gap: 14px;
  font-size: 11.5px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  margin-bottom: 14px;
}
.ui-tabs span {
  padding-bottom: 7px;
  color: var(--muted-foreground);
}
.ui-tabs span.on {
  color: var(--foreground);
  border-bottom: 2px solid var(--primary);
}
.ui-label {
  font-size: 11.5px;
  font-weight: 800;
  margin-bottom: 6px;
}
.ui-empty {
  font-size: 11.5px;
  color: var(--muted-foreground);
  padding: 10px 12px;
  border: 1px dashed var(--border);
  border-radius: 6px;
  margin-bottom: 12px;
}
.ui-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 800;
  padding: 8px 12px;
  border-radius: 9px;
  border: 1.5px solid var(--primary);
  background: var(--card);
  position: relative;
}
.ui-btn.fill {
  background: var(--primary);
  color: var(--primary-foreground);
}
.ui-help {
  font-size: 11px;
  color: var(--muted-foreground);
  margin-top: 8px;
  line-height: 1.5;
}
.ui-linkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding: 7px 8px 7px 10px;
  border: 1.5px solid var(--primary);
  border-radius: 6px;
  background: var(--background);
  font-size: 11px;
}
.ui-linkbox code {
  flex: 1;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0;
  overflow: hidden;
  white-space: nowrap;
}
.ui-linkbox .ui-btn {
  padding: 4px 9px;
  font-size: 11px;
}
.ui-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1.5px solid var(--primary);
  border-radius: 6px;
  background: var(--card);
}
.ui-row .avatar {
  width: 30px;
  height: 30px;
  font-size: 12px;
}
.ui-row b {
  display: block;
  font-size: 12.5px;
}
.ui-row small {
  color: var(--muted-foreground);
  font-size: 10.5px;
}

/* 무대 속 휴대폰: 학생 */
.phone {
  position: absolute;
  right: 4px;
  top: 0;
  width: 212px;
  height: 430px;
  border-radius: 30px;
  border: 1.5px solid var(--primary);
  background: var(--card);
  box-shadow: var(--sheet-shadow);
  overflow: hidden;
}
.phone::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 50%;
  width: 62px;
  height: 18px;
  translate: -50% 0;
  border-radius: 12px;
  background: var(--primary);
  z-index: 3;
}
.phone-body {
  position: absolute;
  inset: 42px 14px 16px;
  font-size: 11.5px;
}
.phone .ui-h {
  font-size: 15px;
}

/* 단계별로 바뀌는 조각 */
.scene {
  position: absolute;
  inset: 0;
  opacity: 0;
  translate: 0 10px;
  transition:
    opacity 420ms var(--ease-pen),
    translate 420ms var(--ease-pen);
  pointer-events: none;
}
.phone-idle {
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--muted-foreground);
}
.phone-idle .chat {
  width: 100%;
  display: grid;
  gap: 8px;
}
.bubble {
  justify-self: start;
  max-width: 90%;
  padding: 8px 10px;
  border-radius: 12px 12px 12px 3px;
  background: var(--secondary);
  color: var(--foreground);
  font-size: 11px;
  text-align: left;
}
.bubble.link {
  border: 1.5px solid var(--primary);
  background: var(--card);
  font-weight: 700;
}
.stage[data-step="1"] .s-1,
.stage[data-step="2"] .s-2,
.stage[data-step="2"] .s-12,
.stage[data-step="1"] .s-12,
.stage[data-step="3"] .s-3,
.stage[data-step="3"] .s-34,
.stage[data-step="4"] .s-34,
.stage[data-step="4"] .s-4,
.stage[data-step="2"] .s-23,
.stage[data-step="3"] .s-23 {
  opacity: 1;
  translate: 0 0;
  pointer-events: auto;
}

/* 빨간 펜 표시(단계마다 하나) */
.anno {
  position: absolute;
  z-index: 5;
  pointer-events: none;
}
.anno svg {
  overflow: visible;
}
.anno path {
  fill: none;
  stroke: var(--grading);
  stroke-width: 2.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  opacity: 0;
  transition:
    stroke-dashoffset 800ms var(--ease-pen) 250ms,
    opacity 1ms linear 250ms;
}
.anno .pen {
  font-size: 25px;
  white-space: nowrap;
  clip-path: inset(0 100% 0 0);
  transition: clip-path 700ms var(--ease-pen) 750ms;
}
.stage[data-step="1"] .a-1 path,
.stage[data-step="2"] .a-2 path,
.stage[data-step="3"] .a-3 path,
.stage[data-step="4"] .a-4 path {
  stroke-dashoffset: 0;
  opacity: 1;
}
.stage[data-step="1"] .a-1 .pen,
.stage[data-step="2"] .a-2 .pen,
.stage[data-step="3"] .a-3 .pen,
.stage[data-step="4"] .a-4 .pen {
  clip-path: inset(0 -10% 0 0);
}
.anno:not(.on) {
  transition: opacity 200ms;
}

/* 창과 휴대폰 사이를 지나가는 링크 */
.route {
  position: absolute;
  left: 280px;
  top: 100px;
  width: 260px;
  height: 220px;
  overflow: visible;
  z-index: 6;
  pointer-events: none;
}
.route path {
  fill: none;
  stroke: var(--primary);
  stroke-width: 2;
  stroke-dasharray: 5 6;
  opacity: 0.35;
  transition: opacity 400ms;
}
.route .solid {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  opacity: 1;
  stroke-width: 3;
  transition: stroke-dashoffset 900ms var(--ease-pen) 200ms;
}
.stage[data-step="4"] .route .solid {
  stroke-dashoffset: 0;
}
.ticket-g {
  opacity: 0;
  transition: opacity 300ms;
}
.ticket-g rect {
  fill: var(--card);
  stroke: var(--primary);
  stroke-width: 1.5;
}
.ticket-g .tp {
  fill: var(--tape);
  stroke: none;
}
.ticket-g text {
  font: 800 11px var(--font-sans);
  fill: var(--primary);
  letter-spacing: -0.02em;
}
.stage[data-step="2"] .ticket-g {
  opacity: 1;
}
/* 도장 */
.stamp {
  position: absolute;
  z-index: 7;
  padding: 6px 14px;
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--primary);
  border: 3px double var(--primary);
  border-radius: 6px;
  background: rgba(255, 253, 248, 0.86);
  opacity: 0;
  rotate: -9deg;
  scale: 0.5;
}
.stage[data-step="4"] .stamp {
  animation: stamp 450ms var(--ease-stamp) both;
}
.stage[data-step="4"] .stamp + .stamp {
  animation-delay: 260ms;
}

/* 오른쪽 단계 글 */
.steps {
  display: grid;
}
.step {
  min-height: 78vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 20px 0;
  opacity: 0.38;
  transition: opacity 400ms var(--ease-pen);
}
.step:first-child {
  min-height: 60vh;
  justify-content: flex-start;
  padding-top: 90px;
}
.step:last-child {
  min-height: 70vh;
}
.step.on {
  opacity: 1;
}
.step .no {
  font-size: 54px;
  line-height: 1;
}
.step h3 {
  margin: 14px 0 10px;
  font-size: 26px;
  font-weight: 900;
  line-height: 1.3;
}
.step p {
  margin: 0 0 12px;
  color: var(--muted-foreground);
}
.step .role {
  align-self: flex-start;
}
.quote-ui {
  display: block;
  margin-top: 6px;
  padding: 12px 14px;
  border-left: 3px solid var(--primary);
  background: var(--card);
  font-size: 14px;
  font-weight: 700;
  color: var(--foreground);
}
.quote-ui::before {
  content: "화면 문구";
  display: block;
  font-size: 11px;
  font-weight: 800;
  color: var(--muted-foreground);
  margin-bottom: 2px;
}

/* ───────── 세 가지 경우(탭) ───────── */
.cases {
  margin-top: 56px;
}
.seg {
  display: inline-flex;
  gap: 4px;
  padding: 5px;
  border: 1.5px solid var(--primary);
  border-radius: 12px;
  background: var(--card);
  position: relative;
}
.seg label {
  position: relative;
  z-index: 1;
  padding: 11px 20px;
  border-radius: 8px;
  font-weight: 800;
  cursor: pointer;
  transition: color 250ms var(--ease-pen);
  white-space: nowrap;
}
.seg label {
  transition:
    color 250ms var(--ease-pen),
    background 250ms var(--ease-pen);
}
.seg label:hover {
  background: var(--accent);
}
#c1:checked ~ .seg label[for="c1"],
#c2:checked ~ .seg label[for="c2"],
#c3:checked ~ .seg label[for="c3"] {
  color: var(--primary-foreground);
  background: var(--primary);
}
#c1:focus-visible ~ .seg label[for="c1"],
#c2:focus-visible ~ .seg label[for="c2"],
#c3:focus-visible ~ .seg label[for="c3"] {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
}
.cases > input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.case-panel {
  display: none;
  margin-top: 36px;
}
#c1:checked ~ .panels .p1,
#c2:checked ~ .panels .p2,
#c3:checked ~ .panels .p3 {
  display: block;
}
.case-intro {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 30px;
}
.track {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.track::before {
  content: "";
  position: absolute;
  left: 22px;
  right: 22px;
  top: 22px;
  height: 2px;
  background: var(--primary);
  transform-origin: left;
  animation: grow 1100ms var(--ease-pen) both;
}
.track li {
  position: relative;
  animation: pop-up 600ms var(--ease-pen) both;
  animation-delay: calc(250ms + var(--i) * 170ms);
}
.track .dot {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1.5px solid var(--primary);
  background: var(--card);
  display: grid;
  place-items: center;
  font-size: 18px;
  position: relative;
  z-index: 1;
}
.track li:last-child .dot {
  background: var(--primary);
  color: var(--primary-foreground);
}
.track .card {
  margin-top: 18px;
  padding: 18px 18px 16px;
  min-height: 210px;
}
.track h4 {
  margin: 10px 0 8px;
  font-size: 17px;
  font-weight: 900;
  line-height: 1.35;
}
.track p {
  margin: 0;
  font-size: 14px;
  color: var(--muted-foreground);
}
.track .quote-ui {
  font-size: 12.5px;
  margin-top: 12px;
  background: var(--background);
}
.case-note {
  margin: 28px 0 0 auto;
  width: fit-content;
  font-size: clamp(26px, 2.8vw, 34px);
  rotate: -2deg;
  clip-path: inset(0 100% 0 0);
  animation: wipe 1000ms var(--ease-pen) 1100ms forwards;
}
/* 세 칸 트랙(12장 둘째 달부터의 정기 결제): 넓은 화면에서만 세 칸, 좁으면 기존 규칙대로 */
@media (min-width: 1021px) {
  .track.three {
    grid-template-columns: repeat(3, 1fr);
  }
}
.js [data-reveal] > .track.three ~ .case-note {
  animation-play-state: paused;
}
.js [data-reveal].in > .track.three ~ .case-note {
  animation-play-state: running;
}

/* ───────── 링크가 안 열릴 때 ───────── */
.troubles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-top: 56px;
}
.trouble {
  position: relative;
  padding: 30px 26px 26px;
}
.trouble:nth-child(odd) {
  --tilt: -0.6deg;
}
.trouble:nth-child(even) {
  --tilt: 0.5deg;
}
.trouble .see {
  font-size: 12px;
  font-weight: 800;
  color: var(--muted-foreground);
}
.toast {
  margin: 8px 0 18px;
  padding: 12px 14px;
  border-radius: 8px;
  background: var(--primary);
  color: var(--primary-foreground);
  font-size: 14px;
  font-weight: 700;
  box-shadow: var(--sheet-shadow-sm);
}
.trouble h3 {
  margin: 0 0 6px;
  font-size: 19px;
  font-weight: 900;
}
.trouble p {
  margin: 0;
  font-size: 14.5px;
  color: var(--muted-foreground);
}
.trouble.wide {
  grid-column: span 2;
}

/* 알아 두세요 */
.notice {
  margin-top: 56px;
  position: relative;
  padding: 30px 32px 30px 88px;
  border: 1.5px solid var(--primary);
  border-radius: 6px;
  background: var(--highlight);
  box-shadow: var(--sheet-shadow);
}
.notice .bang {
  position: absolute;
  left: 28px;
  top: 28px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1.5px solid var(--primary);
  display: grid;
  place-items: center;
  font-weight: 900;
  background: var(--card);
}
.notice h3 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 900;
}
.notice ul {
  margin: 0;
  padding-left: 18px;
}
.notice li + li {
  margin-top: 4px;
}

/* 선생님 한마디 + 기억할 것 */
.closing {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
}
.teacher {
  position: relative;
  padding: 42px 38px 34px;
  --tilt: -1deg;
}
.teacher .pen {
  font-size: clamp(30px, 3vw, 38px);
}
.teacher .sign {
  margin-top: 18px;
  text-align: right;
  font-size: 34px;
  color: var(--foreground);
}
.teacher .pen-line {
  display: block;
  clip-path: inset(0 100% 0 0);
  transition: clip-path 1000ms var(--ease-pen);
  transition-delay: calc(400ms + var(--i) * 650ms);
}
.teacher.in .pen-line {
  clip-path: inset(0 -5% 0 0);
}
.remember h2 {
  margin-bottom: 20px;
}
.remember .checks li {
  font-size: 17px;
  font-weight: 700;
  padding: 16px 0;
}

/* 다음 장·도움 */
.next {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 34px 0;
  border-block: 1.5px solid var(--primary);
  margin-top: clamp(80px, 10vw, 120px);
}
.next .muted {
  font-size: 13px;
  font-weight: 700;
}
.next b {
  display: block;
  font-size: 22px;
  font-weight: 900;
}
.help {
  background: var(--primary);
  color: var(--primary-foreground);
  padding: clamp(80px, 10vw, 130px) 0 48px;
}
.help .h-lg .sub {
  display: block;
  color: var(--highlight);
  margin-top: 4px;
}
.help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}
.help .btn {
  background: var(--highlight);
  color: var(--primary);
  border-color: var(--highlight);
}
.help .btn.outline {
  background: transparent;
  color: var(--primary-foreground);
  border-color: rgba(245, 242, 235, 0.6);
}
.help .btn:hover {
  box-shadow: 4px 4px 0 var(--grading);
}
.help .btn.outline:hover {
  box-shadow: 4px 4px 0 rgba(245, 242, 235, 0.5);
}
.foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: clamp(80px, 9vw, 120px);
  padding-top: 24px;
  border-top: 1px solid rgba(245, 242, 235, 0.2);
  font-size: 13px;
  color: rgba(245, 242, 235, 0.6);
}
.foot .logo img {
  filter: invert(1) brightness(2);
}
.foot .logo b {
  color: var(--primary-foreground);
}

/* ───────── 움직임 ───────── */
@keyframes draw {
  to {
    stroke-dashoffset: 0;
  }
}
@keyframes wipe {
  to {
    clip-path: inset(0 -5% 0 0);
  }
}
@keyframes word-rise {
  from {
    opacity: 0;
    transform: translateY(0.4em) rotate(2deg);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
@keyframes drop-in {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: none;
  }
}
@keyframes leaf-drop {
  from {
    opacity: 0;
    transform: translateY(-60px) rotate(calc(var(--r) * -2));
  }
  60% {
    opacity: 1;
  }
  to {
    opacity: 1;
    transform: none;
  }
}
@keyframes leaf-float {
  0%,
  100% {
    translate: 0 0;
  }
  50% {
    translate: 0 -6px;
  }
}
@keyframes ticker {
  to {
    transform: translateX(-50%);
  }
}
@keyframes grow {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}
@keyframes pop-up {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
@keyframes stamp {
  from {
    opacity: 0;
    scale: 1.7;
    rotate: -18deg;
  }
  to {
    opacity: 1;
    scale: 1;
    rotate: -9deg;
  }
}
@keyframes pulse-ring {
  from {
    box-shadow: 0 0 0 0 rgba(11, 37, 69, 0.35);
  }
  to {
    box-shadow: 0 0 0 12px rgba(11, 37, 69, 0);
  }
}
.stage[data-step="3"] .pulse {
  animation: pulse-ring 1.4s ease-out infinite;
}

/* ───────── 태블릿·휴대폰 ───────── */
@media (max-width: 1020px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .paper-stack {
    height: 440px;
    max-width: 520px;
  }
  .who {
    grid-template-columns: 1fr 1fr;
  }
  .who-q {
    grid-column: 1 / -1;
  }
  .troubles {
    grid-template-columns: 1fr 1fr;
  }
  .trouble.wide {
    grid-column: span 2;
  }
  .track {
    grid-template-columns: 1fr 1fr;
  }
  .track::before {
    display: none;
  }
  .closing {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 860px) {
  .story {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .stage {
    position: relative;
    top: auto;
    background: var(--secondary);
    padding: 12px 0 10px;
    border-bottom: 1px dashed var(--border);
  }
  .stage-dots {
    margin-top: 8px;
  }
  .stage-caption {
    display: flex;
    gap: 8px;
    align-items: baseline;
    justify-content: center;
    margin: 6px 0 0;
    font-size: 14px;
    font-weight: 800;
    line-height: 1.3;
  }
  .stage-caption b {
    font-size: 16px;
  }
  .stage-box {
    aspect-ratio: auto;
    height: 340px;
    overflow: hidden;
  }
  .step {
    opacity: 1;
  }
  .stage-col {
    position: sticky;
    top: var(--header);
    z-index: 4;
  }
  .step,
  .step:first-child,
  .step:last-child {
    min-height: 62vh;
    padding-top: 40px;
    justify-content: flex-start;
  }
  .two-col {
    grid-template-columns: 1fr;
  }
  .ask {
    grid-template-columns: 1fr;
  }
  .facts {
    grid-template-columns: 1fr 1fr;
  }
  .fact:nth-child(2) {
    border-right: 0;
  }
  .fact:nth-child(-n + 2) {
    border-bottom: 1px dashed var(--border);
  }
}
@media (max-width: 640px) {
  :root {
    --gutter: 20px;
    --header: 56px;
  }
  .header-chip {
    display: none;
  }
  .header-link {
    padding: 8px 12px;
    font-size: 13px;
  }
  .who {
    grid-template-columns: 1fr;
  }
  .paper-stack {
    height: 380px;
  }
  .leaf {
    width: 220px;
    padding: 20px 18px 18px;
  }
  .leaf .num {
    font-size: 34px;
  }
  .leaf h3 {
    font-size: 16px;
  }
  .leaf .mini {
    height: 64px;
  }
  .leaf:nth-child(1) {
    left: 4px;
    top: 44px;
    --r: -5deg;
  }
  .leaf:nth-child(2) {
    left: auto;
    right: 4px;
    top: 0;
  }
  .leaf:nth-child(3) {
    top: 176px;
    left: 50%;
    margin-left: -110px;
    --r: 4deg;
  }
  .toc {
    grid-template-columns: 1fr;
  }
  .toc a,
  .toc .row {
    grid-template-columns: 44px 1fr auto;
  }
  .troubles,
  .track {
    grid-template-columns: 1fr;
  }
  .trouble.wide {
    grid-column: auto;
  }
  .track .card {
    min-height: 0;
  }
  .seg {
    display: flex;
    width: 100%;
  }
  .seg-labels {
    width: 100%;
  }
  .seg label {
    flex: 1;
    text-align: center;
    padding: 10px 6px;
    font-size: 14px;
  }
  .btn {
    width: 100%;
    justify-content: center;
  }
  .notice {
    padding: 74px 22px 24px;
  }
  .notice .bang {
    left: 22px;
    top: 22px;
  }
  .persona,
  .teacher {
    padding: 28px 22px 24px;
  }
  .step h3 {
    font-size: 22px;
  }
  .fact {
    padding: 24px 14px 22px;
  }
}

/* 움직임 줄이기: 모두 끝난 모습으로 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    transition-delay: 0ms !important;
  }
  html {
    scroll-behavior: auto;
  }
  .ticker-track {
    animation: none;
  }
}

/* 인쇄: 모든 단계가 보이게 */
@media print {
  .site-header,
  .ticker,
  .stage-col {
    display: none;
  }
  .js [data-reveal] {
    opacity: 1;
    translate: none;
  }
  .step {
    opacity: 1;
    min-height: 0;
  }
  .case-panel {
    display: block !important;
  }
  .hero-pen,
  .case-note,
  .teacher .pen-line {
    clip-path: none !important;
  }
}

/* ═════════ 공용 조각(운영 안내서에서 먼저 쓰고 고객 안내서에도 씀) ═════════ */
/* 역할·주의 꼬리표 */
.role.owner {
  color: var(--primary-foreground);
  background: var(--primary);
  border-color: var(--primary);
}
.role.owner::before {
  background: var(--highlight);
}
.role.ops {
  color: var(--primary);
}
.role.auto {
  color: var(--muted-foreground);
  border-style: dashed;
}
.role.payer {
  color: var(--student);
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11.5px;
  font-weight: 800;
  line-height: 1;
  padding: 4px 8px;
  border-radius: 4px;
  white-space: nowrap;
  vertical-align: middle;
}
.tag.mail {
  background: var(--highlight);
  color: var(--primary);
}
.tag.mail::before {
  content: "✉";
}
.tag.irrev {
  border: 1.5px dashed var(--primary);
  color: var(--primary);
}
.tag.irrev::before {
  content: "!";
  font-weight: 900;
}

/* 표지 오른쪽: 역할 카드 안 할 일 목록 */
.who-card ul {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--foreground);
}
.who-card li {
  padding: 6px 0;
  border-top: 1px dashed var(--border);
}

/* 상태 사슬 */
.chain {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
  list-style: none;
  padding: 0;
}
.chain::before {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  top: 34px;
  height: 2px;
  background: var(--primary);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 1400ms var(--ease-pen) 200ms;
}
.chain.in::before {
  transform: scaleX(1);
}
.chain li {
  text-align: center;
  padding: 0 10px;
}
.chain .st {
  position: relative;
  z-index: 1;
  display: inline-block;
  padding: 14px 18px;
  font-size: 19px;
  font-weight: 900;
  border: 3px double var(--primary);
  border-radius: 6px;
  background: var(--card);
  opacity: 0;
  rotate: -8deg;
  scale: 1.5;
}
.chain.in .st {
  animation: stamp-chain 450ms var(--ease-stamp) both;
  animation-delay: calc(300ms + var(--i) * 380ms);
}
.chain li:last-child .st {
  background: var(--primary);
  color: var(--primary-foreground);
}
.chain .by {
  margin-top: 16px;
  font-size: 13px;
  font-weight: 800;
}
.chain .how {
  margin-top: 6px;
  font-size: 14px;
  color: var(--muted-foreground);
}
@keyframes stamp-chain {
  from {
    opacity: 0;
    scale: 1.6;
    rotate: -16deg;
  }
  to {
    opacity: 1;
    scale: 1;
    rotate: -3deg;
  }
}

/* 무대 속 admin 창 */
.adm {
  position: absolute;
  left: 0;
  top: 30px;
  width: 414px;
  height: 412px;
  overflow: hidden;
}
.adm-side {
  position: absolute;
  left: 0;
  top: 34px;
  bottom: 0;
  width: 92px;
  background: var(--primary);
  color: var(--primary-foreground);
  padding: 12px 8px;
  font-size: 10.5px;
  font-weight: 700;
}
.adm-side .brand {
  font-family: var(--font-serif);
  font-size: 10px;
  letter-spacing: 0.06em;
  line-height: 1.05;
  margin: 0 0 14px 4px;
}
.adm-side .grp {
  font-size: 9px;
  opacity: 0.55;
  margin: 10px 0 4px 4px;
}
.adm-side .it {
  padding: 4px 6px;
  border-radius: 4px;
}
.adm-side .it.on {
  background: var(--highlight);
  color: var(--primary);
}
.adm-main {
  position: absolute;
  left: 92px;
  right: 0;
  top: 34px;
  bottom: 0;
  font-size: 11.5px;
}
.st-badge {
  position: absolute;
  right: 12px;
  top: 24px;
  font-size: 10.5px;
  font-weight: 800;
  padding: 4px 8px;
  border: 1.5px solid var(--primary);
  border-radius: 4px;
  background: var(--card);
}
.st-badge.now {
  background: var(--primary);
  color: var(--primary-foreground);
}
.stage[data-step="4"] .st-badge.now {
  animation: stamp 450ms var(--ease-stamp) both;
  rotate: 0deg;
}
.stepper-mini {
  position: absolute;
  left: 14px;
  right: 14px;
  top: 54px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 4px;
  font-size: 9.5px;
  font-weight: 800;
  color: var(--muted-foreground);
}
.stepper-mini span {
  padding-top: 7px;
  border-top: 3px solid var(--border);
  transition:
    border-color 400ms var(--ease-pen),
    color 400ms var(--ease-pen);
}
.stage[data-step="1"] .stepper-mini span:nth-child(-n + 1),
.stage[data-step="2"] .stepper-mini span:nth-child(-n + 2),
.stage[data-step="3"] .stepper-mini span:nth-child(-n + 2),
.stage[data-step="4"] .stepper-mini span:nth-child(-n + 3) {
  border-color: var(--primary);
  color: var(--foreground);
}
.adm-tabs {
  position: absolute;
  left: 14px;
  right: 14px;
  top: 90px;
  display: flex;
  gap: 10px;
  font-size: 10px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.adm-tabs span {
  padding-bottom: 6px;
  color: var(--muted-foreground);
}
.adm-tabs span.on {
  color: var(--foreground);
  border-bottom: 2px solid var(--primary);
}
.chk-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
}
.chk-row i {
  font-style: normal;
  width: 14px;
  text-align: center;
  font-weight: 900;
}
.chk-row.no {
  color: var(--foreground);
}
.chk-row.no i {
  color: var(--muted-foreground);
}
.chk-row.ok {
  color: var(--muted-foreground);
}
.chk-row.ok i {
  color: var(--primary);
}
.chk-row .ui-btn {
  margin-left: auto;
  padding: 3px 8px;
  font-size: 10px;
}
.mini-notice {
  padding: 9px 10px;
  border-radius: 6px;
  background: var(--highlight);
  border: 1.5px solid var(--primary);
  font-size: 10.5px;
  line-height: 1.5;
  font-weight: 600;
}
.fieldset {
  padding: 10px 10px 12px;
  border: 1px dashed var(--border);
  border-radius: 6px;
  background: var(--background);
}
.fieldset b {
  display: block;
  font-size: 10.5px;
  margin-bottom: 8px;
}
.fgrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px 8px;
}
.fld {
  font-size: 9.5px;
  font-weight: 700;
  color: var(--muted-foreground);
}
.fld > span {
  display: block;
  margin-top: 3px;
  padding: 5px 7px;
  border: 1.5px solid var(--primary);
  border-radius: 5px;
  background: var(--card);
  color: var(--foreground);
  font-size: 10.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0;
  white-space: nowrap;
  overflow: hidden;
}
.typing {
  display: inline-block;
  overflow: hidden;
  white-space: nowrap;
  vertical-align: bottom;
  max-width: 0;
}
.stage[data-step="1"] .s-1 .typing,
.stage[data-step="2"] .s-2 .typing,
.stage[data-step="3"] .s-3 .typing,
.stage[data-step="4"] .s-4 .typing {
  animation: type 900ms steps(16) forwards;
  animation-delay: calc(500ms + var(--i, 0) * 450ms);
}
@keyframes type {
  to {
    max-width: 100%;
  }
}

/* 체크리스트(누르면 체크) */
.checklist {
  position: relative;
  padding: 40px 36px 30px;
  --tilt: -0.6deg;
}
.checklist h3 {
  margin: 0 0 6px;
  font-size: 24px;
  font-weight: 900;
}
.checklist ol {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}
.checklist li + li {
  border-top: 1px dashed var(--border);
}
.checklist label {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  padding: 14px 0;
  cursor: pointer;
  font-weight: 700;
}
.checklist input {
  position: absolute;
  opacity: 0;
}
.checklist .box {
  width: 24px;
  height: 24px;
  border: 1.5px solid var(--primary);
  border-radius: 4px;
  background: var(--card);
  display: grid;
  place-items: center;
  margin-top: 1px;
}
.checklist .box svg {
  width: 20px;
  height: 20px;
  overflow: visible;
}
.checklist .box path {
  fill: none;
  stroke: var(--primary);
  stroke-width: 2.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  opacity: 0;
  transition:
    stroke-dashoffset 450ms var(--ease-pen),
    opacity 1ms;
}
.checklist input:checked + .box path {
  stroke-dashoffset: 0;
  opacity: 1;
}
.checklist input:checked ~ .txt {
  color: var(--muted-foreground);
  text-decoration: line-through;
  text-decoration-thickness: 1.5px;
}
.checklist input:focus-visible + .box {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
}
.checklist .txt small {
  display: block;
  font-weight: 500;
  color: var(--muted-foreground);
  text-decoration: none;
}
.done-note {
  margin: 16px 0 0;
  font-size: 30px;
  text-align: right;
  clip-path: inset(0 100% 0 0);
  transition: clip-path 800ms var(--ease-pen);
}
.checklist.all .done-note {
  clip-path: inset(0 -5% 0 0);
}

@media (max-width: 1020px) {
  .chain {
    grid-template-columns: 1fr 1fr;
    row-gap: 36px;
  }
  .chain::before {
    display: none;
  }
}
@media (max-width: 640px) {
  .chain {
    grid-template-columns: 1fr;
  }
  .chain li {
    text-align: left;
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: 16px;
    align-items: center;
  }
  .chain .st {
    grid-row: span 2;
    font-size: 16px;
    padding: 10px 12px;
  }
  .chain .by {
    margin-top: 0;
  }
  .checklist {
    padding: 34px 22px 24px;
  }
}
@media print {
  .checklist .box path {
    opacity: 0;
  }
}


/* ═════════ 타임라인: 스크롤하면 잉크 선이 내려오고 날짜가 하나씩 켜진다(data-progress) ═════════ */
.tl {
  position: relative;
  list-style: none;
  margin: 64px 0 0;
  padding: 0 0 0 64px;
}
.tl::before,
.tl::after {
  content: "";
  position: absolute;
  left: 22px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  border-radius: 3px;
}
.tl::before {
  background: var(--border);
}
.tl::after {
  background: var(--primary);
  transform-origin: top;
  transform: scaleY(var(--p, 0));
}
.tl-item {
  position: relative;
  padding: 0 0 46px;
  opacity: 0.35;
  translate: 0 14px;
  transition:
    opacity 500ms var(--ease-pen),
    translate 500ms var(--ease-pen);
}
.tl-item.on {
  opacity: 1;
  translate: 0 0;
}
.tl-item .node {
  position: absolute;
  left: -58px;
  top: 2px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  background: var(--card);
  z-index: 1;
  transition:
    background 400ms var(--ease-pen),
    scale 400ms var(--ease-stamp);
}
.tl-item.on .node {
  background: var(--primary);
  scale: 1.08;
}
.tl-item .when {
  font-size: clamp(30px, 3.6vw, 44px);
  line-height: 1;
}
.tl-item h3 {
  margin: 10px 0 6px;
  font-size: 22px;
  font-weight: 900;
}
.tl-item p {
  margin: 0;
  max-width: 640px;
  color: var(--muted-foreground);
}
.tl-item .role,
.tl-item .tag {
  margin-top: 10px;
}
.tl-item.big .when {
  color: var(--grading);
}

/* 일주일 막대 */
.week {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 10px;
  align-items: end;
  height: 220px;
  margin-top: 48px;
  padding: 0 4px;
  border-bottom: 1.5px solid var(--primary);
}
.week .bar {
  position: relative;
  height: calc(var(--h) * 1%);
  background: var(--primary);
  border-radius: 6px 6px 0 0;
  transform-origin: bottom;
  transform: scaleY(0);
  transition: transform 900ms var(--ease-pen);
  transition-delay: calc(var(--i) * 90ms);
}
.week .bar.rest {
  background: var(--border);
}
.week.in .bar {
  transform: scaleY(1);
}
.week .bar span {
  position: absolute;
  top: -24px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 13px;
  font-weight: 800;
  color: var(--foreground);
}
.week-days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 10px;
  padding: 8px 4px 0;
  text-align: center;
  font-weight: 800;
  font-size: 14px;
  color: var(--muted-foreground);
}

/* 요금 카드 */
.plans {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 56px;
  align-items: start;
}
.plan {
  position: relative;
  padding: 34px 32px 30px;
}
.plan .name {
  font-family: var(--font-serif);
  font-size: 30px;
}
.plan .price {
  margin: 14px 0 4px;
  font-size: clamp(40px, 5vw, 58px);
  line-height: 1;
}
.plan .price small {
  font-family: var(--font-sans);
  font-size: 0.3em;
  font-weight: 800;
  color: var(--muted-foreground);
  margin-left: 6px;
}
.plan .desc {
  color: var(--muted-foreground);
  font-size: 14px;
  margin: 0 0 18px;
}
.plan.rec {
  --tilt: 0.6deg;
}
.plan .sticker {
  position: absolute;
  top: -18px;
  right: 22px;
  padding: 8px 14px;
  font-family: var(--font-pen);
  font-size: 26px;
  line-height: 1;
  color: var(--grading);
  border: 2px solid var(--grading);
  border-radius: 999px;
  background: var(--card);
  rotate: 8deg;
  opacity: 0;
  scale: 1.6;
}
.plan.rec.in .sticker {
  animation: stamp-chain 450ms var(--ease-stamp) 700ms both;
}

/* 차례로 채점되는 진행 목록(data-progress 안 data-at) */
.ticks {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  border-top: 1.5px solid var(--primary);
}
.ticks li {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 18px 4px;
  border-bottom: 1px dashed var(--border);
}
.ticks .mk {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid var(--primary);
  display: grid;
  place-items: center;
  background: var(--card);
  transition: background 300ms var(--ease-pen);
}
.ticks .mk svg {
  width: 20px;
  height: 20px;
  overflow: visible;
}
.ticks .mk path {
  fill: none;
  stroke: var(--primary-foreground);
  stroke-width: 2.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  opacity: 0;
  transition:
    stroke-dashoffset 450ms var(--ease-pen) 150ms,
    opacity 1ms 150ms;
}
.ticks li.on .mk {
  background: var(--primary);
}
.ticks li.on .mk path {
  stroke-dashoffset: 0;
  opacity: 1;
}
.ticks b {
  display: block;
  font-size: 18px;
  font-weight: 900;
}
.ticks small {
  color: var(--muted-foreground);
  font-size: 14px;
}
.ticks .who {
  white-space: nowrap;
}

/* 결제 화면 모형 속 동의 칸 */
.ui-check {
  display: flex;
  gap: 6px;
  align-items: flex-start;
  font-size: 11px;
  line-height: 1.45;
}
.ui-check i {
  flex: none;
  width: 13px;
  height: 13px;
  margin-top: 1px;
  border: 1.5px solid var(--primary);
  border-radius: 3px;
  font-style: normal;
  font-size: 9px;
  display: grid;
  place-items: center;
  background: var(--card);
  color: transparent;
  transition:
    background 250ms,
    color 250ms;
}
.stage[data-step="3"] .ui-check i,
.stage[data-step="4"] .ui-check i {
  background: var(--primary);
  color: var(--primary-foreground);
}
.ui-sum {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 12px;
  font-size: 11.5px;
}
.ui-sum dt {
  color: var(--muted-foreground);
}
.ui-sum dd {
  margin: 0;
  font-weight: 800;
  text-align: right;
}

@media (max-width: 860px) {
  .plans {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}
@media (max-width: 640px) {
  .tl {
    padding-left: 52px;
  }
  .tl::before,
  .tl::after {
    left: 16px;
  }
  .tl-item .node {
    left: -50px;
    width: 30px;
    height: 30px;
  }
  .week {
    gap: 6px;
    height: 180px;
  }
  .week-days {
    gap: 6px;
  }
  .ticks li {
    grid-template-columns: 40px 1fr;
  }
  .ticks .who {
    grid-column: 2;
  }
  .plan {
    padding: 30px 22px 24px;
  }
}
@media print {
  .tl-item {
    opacity: 1;
    translate: none;
  }
}

/* 카드 안 크레용 동그라미는 카드가 보일 때 그린다 */
.trouble .crayon path,
.plan .crayon path {
  animation-delay: 500ms;
  animation-play-state: paused;
}
.trouble.in .crayon path,
.plan.in .crayon path {
  animation-play-state: running;
}

/* ═════════ 레슨 10단계: 탭을 누르거나, 보이는 동안 저절로 넘어간다 ═════════ */
.ls {
  margin-top: 56px;
}
.ls-tabs {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 6px;
}
.ls-tabs button {
  font: inherit;
  cursor: pointer;
  padding: 10px 4px 9px;
  border: 1.5px solid var(--primary);
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
  background: var(--secondary);
  color: var(--muted-foreground);
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.2;
  position: relative;
  transition:
    background 250ms var(--ease-pen),
    color 250ms var(--ease-pen),
    translate 250ms var(--ease-pen);
}
.ls-tabs button .serif {
  display: block;
  font-size: 13px;
}
.ls-tabs button[aria-selected="true"] {
  background: var(--primary);
  color: var(--primary-foreground);
  translate: 0 -6px;
}
.ls-tabs button::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 4px;
  height: 2px;
  background: var(--highlight);
  transform-origin: left;
  transform: scaleX(0);
}
.ls.playing .ls-tabs button[aria-selected="true"]::after {
  animation: ls-timer 4200ms linear forwards;
}
@keyframes ls-timer {
  to {
    transform: scaleX(1);
  }
}
.ls-body {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 36px;
  align-items: center;
  padding: 28px;
  border-top: 6px solid var(--primary);
}
.ls-img {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: 6px;
  overflow: hidden;
  border: 1.5px solid var(--primary);
  background: var(--figure);
}
.ls-img img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  scale: 1.04;
  transition:
    opacity 500ms var(--ease-pen),
    scale 900ms var(--ease-pen);
}
.ls-img img.on {
  opacity: 1;
  scale: 1;
}
.ls-text .eyebrow {
  color: var(--student);
}
.ls-text h3 {
  margin: 8px 0 10px;
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 900;
  letter-spacing: -0.04em;
}
.ls-text p {
  margin: 0;
  color: var(--muted-foreground);
}
.ls-count {
  margin-top: 22px;
  font-size: 15px;
}
.ls-text > * {
  animation: ls-in 450ms var(--ease-pen) both;
}
@keyframes ls-in {
  from {
    opacity: 0;
    translate: 0 10px;
  }
}
@media (max-width: 860px) {
  .ls-tabs {
    grid-template-columns: repeat(5, 1fr);
    row-gap: 10px;
  }
  .ls-tabs button {
    border-radius: 8px;
    border-bottom: 1.5px solid var(--primary);
  }
  .ls-tabs button[aria-selected="true"] {
    translate: 0 0;
  }
  .ls-body {
    grid-template-columns: 1fr;
    padding: 18px;
    gap: 18px;
    margin-top: 10px;
  }
}

/* 경우 나누기 밖의 트랙도 보일 때 움직인다 */
.js [data-reveal] .track li,
.js [data-reveal] .track::before {
  animation-play-state: paused;
}
.js [data-reveal].in .track li,
.js [data-reveal].in .track::before {
  animation-play-state: running;
}

/* ═════════ 채점 줄: 빨간 펜으로 ○ / ／ 를 차례로 긋는다(단원 과제 채점은 빨간 펜 자리) ═════════ */
.grade {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 10px;
  margin-top: 48px;
  padding: 26px 22px 22px;
  position: relative;
}
.grade .q {
  text-align: center;
}
.grade .q .n {
  font-size: 15px;
  color: var(--muted-foreground);
}
.grade .q svg {
  display: block;
  width: 100%;
  max-width: 52px;
  margin: 6px auto 0;
  aspect-ratio: 1;
  overflow: visible;
}
.grade .q path {
  fill: none;
  stroke: var(--grading);
  stroke-width: 3.2;
  stroke-linecap: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  opacity: 0;
  transition:
    stroke-dashoffset 380ms var(--ease-pen),
    opacity 1ms;
  transition-delay: calc(300ms + var(--i) * 170ms);
}
.grade.in .q path {
  stroke-dashoffset: 0;
  opacity: 1;
}
.grade .score {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
  margin-top: 10px;
  border-top: 1px dashed var(--border);
  padding-top: 16px;
}
.grade .score .serif {
  font-size: 46px;
  line-height: 1;
  color: var(--grading);
}
.grade .result {
  display: inline-block;
  padding: 8px 16px;
  font-weight: 900;
  font-size: 20px;
  border: 3px double var(--primary);
  border-radius: 6px;
  opacity: 0;
  rotate: -8deg;
}
.grade.in .result {
  animation: stamp-chain 450ms var(--ease-stamp) 2300ms both;
}

/* ═════════ 복습 간격: 맞힐수록 다음 복습이 멀어진다 ═════════ */
.sr {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  margin-top: 40px;
}
.sr .stop {
  padding: 12px 16px;
  border: 1.5px solid var(--primary);
  border-radius: 8px;
  background: var(--card);
  font-weight: 800;
  white-space: nowrap;
  opacity: 0;
  translate: 0 12px;
  transition:
    opacity 450ms var(--ease-pen),
    translate 450ms var(--ease-pen);
  transition-delay: calc(var(--i) * 260ms);
}
.sr .stop.done {
  background: var(--primary);
  color: var(--primary-foreground);
}
.sr .gap {
  height: 2px;
  background: var(--primary);
  width: var(--w);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 450ms var(--ease-pen);
  transition-delay: calc(var(--i) * 260ms + 120ms);
  position: relative;
}
.sr .gap span {
  position: absolute;
  top: -24px;
  left: 50%;
  translate: -50% 0;
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
  color: var(--muted-foreground);
}
.sr.in .stop {
  opacity: 1;
  translate: 0 0;
}
.sr.in .gap {
  transform: scaleX(1);
}

/* 오답노트 세 칸 예시(학생 글은 파란색, 손글씨 아님) */
.note3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 40px;
}
.note3 > div {
  padding: 22px 20px;
  position: relative;
}
.note3 .lbl {
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.04em;
}
.note3 p {
  margin: 10px 0 0;
  color: var(--student);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.6;
}

@media (max-width: 860px) {
  .grade {
    grid-template-columns: repeat(5, 1fr);
    row-gap: 18px;
  }
  .note3 {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 640px) {
  .sr .gap {
    width: calc(var(--w) * 0.45);
  }
}

/* ═════════ 주별 확인 도장 ═════════ */
.weeks {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
  margin-top: 48px;
}
.wk {
  position: relative;
  padding: 18px 16px 16px;
  min-height: 150px;
}
.wk .t {
  font-size: 13px;
  font-weight: 800;
  color: var(--muted-foreground);
}
.wk .c {
  margin-top: 6px;
  font-weight: 900;
  font-size: 16px;
}
.wk .bar {
  margin-top: 12px;
  height: 6px;
  border-radius: 6px;
  background: var(--border);
  overflow: hidden;
}
.wk .bar i {
  display: block;
  height: 100%;
  width: var(--p);
  background: var(--primary);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 700ms var(--ease-pen);
  transition-delay: calc(var(--i) * 220ms);
}
.weeks.in .wk .bar i {
  transform: scaleX(1);
}
.wk .ok {
  position: absolute;
  right: 10px;
  bottom: 10px;
  padding: 4px 10px;
  font-weight: 900;
  font-size: 15px;
  border: 3px double var(--primary);
  border-radius: 6px;
  opacity: 0;
  rotate: -10deg;
}
.weeks.in .wk .ok {
  animation: stamp-chain 450ms var(--ease-stamp) both;
  animation-delay: calc(500ms + var(--i) * 220ms);
}
.wk.now {
  background: var(--highlight);
}

/* 마감 자 */
.ruler {
  margin-top: 48px;
  display: grid;
  grid-template-columns: 2fr 1.3fr 1fr;
  border: 1.5px solid var(--primary);
  border-radius: 6px;
  overflow: hidden;
}
.ruler > div {
  padding: 22px 20px;
  position: relative;
  opacity: 0;
  transition: opacity 500ms var(--ease-pen);
  transition-delay: calc(var(--i) * 300ms);
}
.ruler.in > div {
  opacity: 1;
}
.ruler .z1 {
  background: var(--primary);
  color: var(--primary-foreground);
}
.ruler .z2 {
  background: var(--highlight);
}
.ruler .z3 {
  background: repeating-linear-gradient(-45deg, var(--card) 0 8px, var(--secondary) 8px 16px);
}
.ruler b {
  display: block;
  font-size: 18px;
  font-weight: 900;
}
.ruler small {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  opacity: 0.8;
}
.ruler .pin {
  position: absolute;
  top: -1px;
  right: -1px;
  font-size: 12px;
  font-weight: 800;
  padding: 3px 8px;
  background: var(--card);
  color: var(--foreground);
  border: 1.5px solid var(--primary);
  border-radius: 0 0 0 6px;
}
@media (max-width: 860px) {
  .weeks {
    grid-template-columns: repeat(3, 1fr);
  }
  .ruler {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 640px) {
  .weeks {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 진행 목록의 역할 배지는 글자 크기만큼만 */
.ticks .who {
  justify-self: start;
  align-self: center;
  height: auto;
}
/* 타자 효과는 무대가 화면에 들어온 뒤에 시작한다 */
.stage:not(.in) .typing {
  animation: none !important;
}

/* ═════════ 환불 계산기 ═════════ */
.calc {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 36px;
  margin-top: 48px;
  padding: 34px 32px;
  align-items: center;
}
.calc label {
  display: block;
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 18px;
}
.calc label span {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
}
.calc label output {
  font-family: var(--font-serif);
  font-size: 18px;
}
.calc input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
}
.calc input[type="radio"] {
  accent-color: var(--primary);
}
.calc .tier {
  display: flex;
  gap: 16px;
  margin-bottom: 18px;
  font-weight: 800;
  font-size: 15px;
}
.calc .out {
  text-align: center;
  padding: 28px 20px;
  border: 3px double var(--primary);
  border-radius: 8px;
  background: var(--background);
}
.calc .out .k {
  font-size: 14px;
  font-weight: 800;
  color: var(--muted-foreground);
}
.calc .out .v {
  font-family: var(--font-serif);
  font-size: clamp(40px, 5vw, 60px);
  line-height: 1.1;
  margin: 8px 0;
  font-variant-numeric: tabular-nums;
}
.calc .out .f {
  font-size: 13px;
  color: var(--muted-foreground);
}
.calc .bar {
  height: 12px;
  border-radius: 8px;
  background: var(--border);
  overflow: hidden;
  margin-top: 14px;
}
.calc .bar i {
  display: block;
  height: 100%;
  background: var(--primary);
  transition: width 400ms var(--ease-pen);
}
@media (max-width: 860px) {
  .calc {
    grid-template-columns: 1fr;
    padding: 26px 20px;
  }
}

/* ═════════ 자주 묻는 질문(펼치기) ═════════ */
.faq {
  margin-top: 48px;
  border-top: 1.5px solid var(--primary);
}
.faq details {
  border-bottom: 1px dashed var(--border);
}
.faq summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 40px 1fr 28px;
  gap: 12px;
  align-items: center;
  padding: 20px 4px;
  font-size: 18px;
  font-weight: 800;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary .serif {
  font-size: 22px;
  color: var(--muted-foreground);
}
.faq summary .pm {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--primary);
  display: grid;
  place-items: center;
  transition:
    rotate 300ms var(--ease-pen),
    background 300ms var(--ease-pen),
    color 300ms var(--ease-pen);
}
.faq details[open] summary .pm {
  rotate: 45deg;
  background: var(--primary);
  color: var(--primary-foreground);
}
.faq summary:hover {
  background: var(--accent);
}
.faq .a {
  padding: 0 44px 22px 56px;
  color: var(--muted-foreground);
  animation: faq-open 380ms var(--ease-pen);
}
.faq .a p {
  margin: 0 0 8px;
}
@keyframes faq-open {
  from {
    opacity: 0;
    translate: 0 -8px;
  }
}
@media (max-width: 640px) {
  .faq summary {
    grid-template-columns: 30px 1fr 28px;
    font-size: 16px;
  }
  .faq .a {
    padding: 0 8px 18px 46px;
  }
}
@media print {
  .faq .a {
    display: block;
  }
}

/* ═════════ 운영: 사이드바 지도(스크롤하면 묶음이 차례로 켜진다) ═════════ */
.sbmap {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  margin-top: 56px;
  align-items: start;
}
.sbmap .side {
  position: sticky;
  top: calc(var(--header) + 32px);
  background: var(--primary);
  color: var(--primary-foreground);
  border-radius: 8px;
  padding: 22px 16px;
  box-shadow: var(--sheet-shadow);
  font-weight: 700;
  font-size: 15px;
}
.sbmap .side .brand {
  font-family: var(--font-serif);
  letter-spacing: 0.06em;
  line-height: 1.05;
  margin: 0 0 18px 8px;
}
.sbmap .grp {
  font-size: 12px;
  opacity: 0.55;
  margin: 16px 0 6px 8px;
  transition: opacity 300ms;
}
.sbmap .it {
  padding: 7px 10px;
  border-radius: 6px;
  transition:
    background 300ms var(--ease-pen),
    color 300ms var(--ease-pen);
}
.sbmap .side[data-on="1"] .g1 .it,
.sbmap .side[data-on="2"] .g2 .it,
.sbmap .side[data-on="3"] .g3 .it,
.sbmap .side[data-on="4"] .g4 .it {
  background: var(--highlight);
  color: var(--primary);
}
.sbmap .side[data-on="1"] .g1 .grp,
.sbmap .side[data-on="2"] .g2 .grp,
.sbmap .side[data-on="3"] .g3 .grp,
.sbmap .side[data-on="4"] .g4 .grp {
  opacity: 1;
}
.sbmap .zones > div {
  min-height: 52vh;
  padding: 10px 0 40px;
  border-bottom: 1px dashed var(--border);
}
.sbmap .zones h3 {
  margin: 8px 0 10px;
  font-size: 28px;
  font-weight: 900;
}
.sbmap .zones p {
  color: var(--muted-foreground);
  margin: 0 0 10px;
}
@media (max-width: 860px) {
  .sbmap {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .sbmap .side {
    position: sticky;
    top: calc(var(--header) + 8px);
    z-index: 3;
    display: flex;
    flex-wrap: wrap;
    gap: 4px 6px;
    padding: 12px;
    font-size: 12px;
  }
  .sbmap .side .brand,
  .sbmap .grp {
    display: none;
  }
  .sbmap .side > div {
    display: contents;
  }
  .sbmap .it {
    padding: 4px 8px;
  }
  .sbmap .zones > div {
    min-height: 0;
  }
}

/* 단계가 하나씩 차는 단계 띠(.stage.seq) */
.stage.seq[data-step="3"] .stepper-mini span:nth-child(-n + 3),
.stage.seq[data-step="4"] .stepper-mini span:nth-child(-n + 4) {
  border-color: var(--primary);
  color: var(--foreground);
}

/* 켜기 버튼: 목록이 다 체크되면 살아난다(data-progress 안 data-at) */
.ignite {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 36px;
  padding: 26px 24px;
  border: 1.5px dashed var(--border);
  border-radius: 8px;
  transition:
    border-color 400ms,
    background 400ms;
}
.ignite .btn {
  opacity: 0.4;
  pointer-events: none;
  transition: opacity 400ms;
}
.ignite .result {
  display: inline-block;
  padding: 8px 16px;
  font-weight: 900;
  font-size: 20px;
  border: 3px double var(--primary);
  border-radius: 6px;
  opacity: 0;
  rotate: -8deg;
}
.ignite.on {
  border-color: var(--primary);
  border-style: solid;
  background: var(--card);
}
.ignite.on .btn {
  opacity: 1;
  animation: pulse-ring 1.4s ease-out 2;
}
.ignite.on .result {
  animation: stamp-chain 450ms var(--ease-stamp) 600ms both;
}

/* 진행 목록 배지: 표지 '.who'(누구세요 격자)와 이름이 겹쳐 생긴 격자·여백을 없앤다 */
.ticks .who {
  display: inline-flex;
  margin-top: 0;
  gap: 5px;
  grid-template-columns: none;
  width: auto;
}
@media (max-width: 860px) {
  .ticks .who {
    grid-template-columns: none;
    margin-top: 2px;
  }
}
/* 3단계에 찍는 도장 */
.stage[data-step="3"] .stamp.s3 {
  animation: stamp 450ms var(--ease-stamp) both;
}
.stage[data-step="4"] .stamp.s3 {
  animation: none;
  opacity: 0;
}
/* 휴대폰의 복습 간격 그림은 세로로 */
@media (max-width: 640px) {
  .sr {
    flex-direction: column;
    align-items: flex-start;
  }
  .sr .gap {
    width: 2px;
    height: calc(var(--w) * 0.22);
    margin-left: 26px;
    transform-origin: top;
    transform: scaleY(0);
  }
  .sr.in .gap {
    transform: scaleY(1);
  }
  .sr .gap span {
    top: 50%;
    left: 14px;
    translate: 0 -50%;
  }
}

/* 휴대폰: 사이드바 지도는 고정하지 않는다(제목을 가리지 않게) */
@media (max-width: 860px) {
  .sbmap .side {
    position: relative;
    top: auto;
  }
}
/* 휴대폰: 운영 01장 요약 카드는 무대 확대 범위 밖이라 숨긴다 */
@media (max-width: 860px) {
  .stage .desk-only {
    display: none;
  }
}

/* 세 칸 상태 사슬(갈래는 아래 한 줄로) */
.chain.three {
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 1020px) {
  .chain.three {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 640px) {
  .chain.three {
    grid-template-columns: 1fr;
  }
}