@import url('https://fonts.googleapis.com/css2?family=Gowun+Batang:wght@400;700&family=Noto+Sans+KR:wght@400;500;600;700&display=swap');

:root {
  --ink: #163b32;
  --ink-soft: #49645d;
  --cream: #f6f0e5;
  --paper: #fffdf8;
  --sage: #dbe4d7;
  --sage-deep: #9eaf98;
  --gold: #c68b4a;
  --line: rgba(22, 59, 50, 0.17);
  --error: #a24737;
  --success: #287052;
  --serif: 'Gowun Batang', Georgia, serif;
  --sans: 'Noto Sans KR', system-ui, sans-serif;
}

* { box-sizing: border-box; }

.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;
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 14%, rgba(198, 139, 74, 0.11), transparent 25rem),
    radial-gradient(circle at 95% 6%, rgba(72, 104, 83, 0.12), transparent 30rem),
    var(--cream);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.055'/%3E%3C/svg%3E");
}

button, textarea, input { font: inherit; }
button { color: inherit; }

.page-shell { position: relative; width: min(1180px, calc(100% - 48px)); margin: 0 auto; }

main { padding: 84px 0 36px; }
.intro { max-width: 760px; margin-bottom: 54px; }
.eyebrow { margin: 0 0 18px; color: var(--gold); font-size: 11px; font-weight: 700; letter-spacing: 0.22em; }
.intro .eyebrow { color: var(--ink); font: 700 clamp(27px, 4vw, 38px)/1.35 var(--serif); letter-spacing: -0.03em; }
.intro-copy { margin: 27px 0 0; color: var(--ink-soft); font: 400 16px/1.8 var(--sans); }
.mobile-break { display: none; }

.install-button {
  margin-top: 24px;
  padding: 10px 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 99px;
  color: var(--ink);
  background: rgba(255, 253, 248, 0.68);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: border-color 160ms, background 160ms, transform 160ms;
}
.install-button:hover { border-color: var(--ink); background: var(--paper); transform: translateY(-1px); }
.install-button:focus-visible { outline: 3px solid rgba(198, 139, 74, 0.45); outline-offset: 3px; }
.install-button[hidden], .install-help[hidden] { display: none; }
.install-help {
  width: min(100%, 480px);
  margin-top: 16px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  border-left: 3px solid var(--gold);
  color: var(--ink-soft);
  background: rgba(255, 253, 248, 0.78);
  font-size: 13px;
  line-height: 1.6;
}
.install-help button { flex: 0 0 auto; border: 0; background: transparent; cursor: pointer; font-size: 20px; }

.quiz-card {
  overflow: hidden;
  border: 1px solid rgba(22, 59, 50, 0.18);
  border-radius: 4px;
  background: rgba(255, 253, 248, 0.92);
  box-shadow: 0 25px 70px rgba(43, 61, 48, 0.09);
}

.card-topline { min-height: 72px; padding: 0 38px; display: flex; align-items: center; justify-content: space-between; }
.step-label { padding: 7px 12px; border-radius: 99px; background: var(--sage); font-size: 12px; font-weight: 700; }
.counter { display: flex; align-items: baseline; gap: 5px; color: var(--ink-soft); font: 400 13px var(--sans); }
.counter strong { color: var(--ink); font: 400 22px var(--serif); }
.progress-track { height: 3px; background: #e4e3d9; }
.progress-fill { height: 100%; width: 12.5%; background: var(--gold); transition: width 500ms ease; }

.question-area { width: min(780px, calc(100% - 64px)); margin: 0 auto; padding: 72px 0 78px; text-align: center; }
.question-area h2 { margin: 0; font: 700 clamp(30px, 4vw, 45px)/1.3 var(--serif); letter-spacing: -0.03em; }
.stage-guide { margin: 18px 0 38px; color: var(--ink-soft); font-size: 14px; }

.answer-input {
  display: block;
  width: 100%;
  min-height: 154px;
  resize: vertical;
  padding: 25px 27px;
  border: 1px solid var(--line);
  border-radius: 3px;
  outline: 0;
  color: var(--ink);
  background: #faf8f1;
  font: 400 18px/1.9 var(--serif);
  text-align: left;
  transition: border-color 180ms, box-shadow 180ms, background 180ms;
}
.answer-input::placeholder { color: #9aa49e; }
.answer-input:focus { border-color: var(--ink); background: #fff; box-shadow: 0 0 0 3px rgba(22, 59, 50, 0.07); }

.cloze-text { margin: 3px 0 0; color: var(--ink); font: 400 clamp(18px, 2.3vw, 23px)/2.45 var(--serif); text-align: left; word-break: keep-all; }
.cloze-input {
  width: var(--blank-width, 7em);
  min-width: 4.5em;
  height: 38px;
  margin: 0 5px;
  padding: 0 7px;
  border: 0;
  border-bottom: 1.5px solid var(--gold);
  border-radius: 0;
  outline: none;
  color: var(--ink);
  background: rgba(198, 139, 74, 0.08);
  text-align: center;
  vertical-align: baseline;
}
.cloze-input:focus { background: rgba(198, 139, 74, 0.17); border-bottom-color: var(--ink); }
.cloze-input[aria-invalid='true'] { border-bottom-color: var(--error); background: rgba(162, 71, 55, 0.08); }
.cloze-input::placeholder { color: #aa9276; font-family: var(--sans); font-size: 12px; }

.feedback { min-height: 27px; margin: 18px 0 12px; font-size: 14px; font-weight: 600; }
.feedback.error { color: var(--error); }
.feedback.success { color: var(--success); }

.primary-button {
  width: min(100%, 270px);
  height: 58px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--ink);
  border-radius: 2px;
  color: #fff;
  background: var(--ink);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: transform 160ms, background 160ms;
}
.primary-button:hover { background: #205446; transform: translateY(-2px); }
.primary-button:focus-visible, .text-button:focus-visible, .verse-item:focus-visible { outline: 3px solid rgba(198, 139, 74, 0.45); outline-offset: 3px; }

.answer-actions { display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 14px; }
.reveal-button {
  padding: 6px 10px;
  border: 0;
  color: var(--ink-soft);
  background: transparent;
  cursor: pointer;
  font-size: 13px;
  text-decoration: underline;
  text-decoration-color: rgba(73, 100, 93, 0.45);
  text-underline-offset: 5px;
}
.reveal-button:hover { color: var(--ink); text-decoration-color: var(--ink); }
.reveal-button:focus-visible { outline: 3px solid rgba(198, 139, 74, 0.45); outline-offset: 2px; }
.reveal-button[hidden] { display: none; }

.revealed-answer {
  margin: 0;
  padding: 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font: 400 clamp(18px, 2.3vw, 23px)/2 var(--serif);
  text-align: left;
  word-break: keep-all;
}

.card-footer { min-height: 64px; padding: 0 38px; display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 12px; }
.text-button { padding: 8px 0; border: 0; background: none; text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }

.verse-map { padding: 132px 0 110px; }
.map-heading { margin-bottom: 36px; border-bottom: 1px solid var(--line); }
.map-heading h2.eyebrow { margin: 0 0 25px; color: var(--ink); font: 700 15px var(--sans); letter-spacing: 0.04em; }
.verse-list { margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); border-left: 1px solid var(--line); list-style: none; }
.verse-item {
  position: relative;
  min-height: 130px;
  padding: 25px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: transparent;
  text-align: left;
}
.verse-item:nth-child(-n+4) { border-top: 1px solid var(--line); }
.verse-item .number { color: var(--sage-deep); font: 400 12px var(--sans); }
.verse-item .reference { font: 700 17px var(--serif); }
.verse-item.current { background: rgba(255, 253, 248, 0.72); }
.verse-item.current::after { content: ''; position: absolute; top: 18px; right: 18px; width: 7px; height: 7px; border-radius: 50%; background: var(--gold); }
.verse-item.complete .number::after { content: '  ✓'; color: var(--success); }

.complete-panel { padding: 18px 0 4px; }
.complete-icon { width: 72px; height: 72px; margin: 0 auto 24px; display: grid; place-items: center; border: 1px solid var(--gold); border-radius: 50%; color: var(--gold); font: 400 30px var(--serif); }
.complete-panel h3 { margin: 0; font: 700 28px var(--serif); }
.complete-panel p { margin: 16px 0 30px; color: var(--ink-soft); line-height: 1.75; }

@media (max-width: 760px) {
  .page-shell { width: min(100% - 28px, 620px); }
  main { padding: 50px 0 24px; }
  .intro { margin-bottom: 38px; }
  .intro-copy { margin-top: 20px; font-size: 14px; }
  .install-button { margin-top: 19px; }
  .mobile-break { display: block; }
  .card-topline { min-height: 62px; padding: 0 20px; }
  .question-area { width: calc(100% - 34px); padding: 51px 0 55px; }
  .stage-guide { margin: 14px 0 29px; }
  .answer-input { min-height: 168px; padding: 20px; font-size: 17px; }
  .cloze-text { line-height: 2.65; word-break: normal; }
  .cloze-input { margin-inline: 2px; }
  .primary-button { width: 100%; }
  .card-footer { padding: 15px 20px; gap: 16px; line-height: 1.5; }
  .verse-map { padding: 90px 0 80px; }
  .map-heading h2.eyebrow { margin-bottom: 20px; }
  .verse-list { grid-template-columns: repeat(2, 1fr); }
  .verse-item:nth-child(-n+4) { border-top: 0; }
  .verse-item:nth-child(-n+2) { border-top: 1px solid var(--line); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}