/* ============================================================
   learn.css (Lego Block)
   /learn 책장 전용 스타일. 기존 페이지에 영향 없음 —
   .learn- 접두사 밖으로 나가는 선택자를 만들지 않는다.
   토큰은 core-theme.css의 것만 쓴다(새 브랜드 색 금지).
   ============================================================ */

/* 한글은 글자 단위로 끊지 않고 어절 단위로 줄바꿈한다 —
   "말씀드리 / 겠습니다" 같은 단어 중간 절단을 막는다. */
.learn-row__name, .learn-level__who, .learn-rung__say,
.learn-rung__lands, .learn-word, .learn-cell-chip { word-break: keep-all; }

/* ── 책장 지도 (허브) ── */
.learn-shelf { display: grid; gap: 12px; margin-top: 28px; }
.learn-row {
  display: grid; grid-template-columns: 210px 1fr auto; gap: 20px; align-items: center;
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius-md); padding: 18px 22px;
  color: inherit; text-decoration: none;
  transition: border-color .2s ease, transform .2s ease, background .2s ease;
}
a.learn-row:hover { border-color: var(--accent-primary); transform: translateY(-2px); }
.learn-row__name { font-size: 19px; font-weight: 700; color: var(--text-primary); }
.learn-row__name small { display: block; font-size: 12.5px; font-weight: 400; color: var(--text-muted); letter-spacing: .04em; }
.learn-row__cells { display: flex; gap: 8px; flex-wrap: wrap; }
.learn-cell-chip {
  font-size: 12.5px; padding: 4px 11px; border-radius: 999px;
  background: rgba(255,255,255,.04); border: 1px solid var(--border-muted); color: var(--text-secondary);
}
.learn-cell-chip.is-ready { border-color: var(--accent-primary); color: var(--accent-primary); font-weight: 600; }
.learn-row__count { font-size: 13.5px; color: var(--text-muted); white-space: nowrap; font-variant-numeric: tabular-nums; }
@media (max-width: 720px) {
  .learn-row { grid-template-columns: 1fr; gap: 12px; }
  .learn-row__count { justify-self: start; }
}

/* 아직 안 지은 줄 — 정보는 남기되 시각적 무게는 덜어낸다.
   회색 큰 카드 9개가 페이지를 덮으면 "미완성 사이트"로 읽힌다. */
.learn-soon { margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--border-muted); }
.learn-soon__head {
  font-size: 11px; font-weight: 600; letter-spacing: .18em; text-transform: uppercase;
  color: var(--text-muted); margin-bottom: 16px;
}
.learn-soon__grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(215px, 1fr)); gap: 10px;
}
.learn-soon__item {
  padding: 12px 16px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,.02); border: 1px solid var(--border-muted);
}
.learn-soon__item b { display: block; font-size: 15px; font-weight: 600; color: var(--text-secondary); }
.learn-soon__item small { font-size: 12.5px; color: var(--text-muted); }

/* ── 줄 페이지: 4칸 사다리 ── */
.learn-levels { display: grid; gap: 14px; margin-top: 32px; }
.learn-level {
  display: grid; grid-template-columns: 74px 1fr auto; gap: 22px; align-items: center;
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-left: 3px solid var(--accent-primary);
  border-radius: var(--radius-md); padding: 20px 24px;
  color: inherit; text-decoration: none;
  transition: border-color .2s ease, transform .2s ease;
}
a.learn-level:hover { transform: translateY(-2px); border-color: var(--accent-primary); }
.learn-level__n {
  font-family: var(--serif); font-size: 13px; font-weight: 700; color: var(--accent-primary);
  letter-spacing: .1em; text-transform: uppercase;
}
.learn-level__who { font-size: 20px; font-weight: 700; color: var(--text-primary); }
.learn-level__gist { font-size: 15px; color: var(--text-secondary); margin-top: 4px; line-height: 1.6; }
.learn-level__go { font-size: 22px; color: var(--text-muted); }
@media (max-width: 720px) {
  .learn-level { grid-template-columns: 1fr; gap: 8px; }
  .learn-level__go { display: none; }
}

/* ── 칸 페이지: 말의 사다리 ── */
.learn-ladder { margin: 28px 0 0; }
.learn-ladder__head {
  display: flex; justify-content: space-between; gap: 16px;
  font-size: 11px; font-weight: 600; letter-spacing: .18em; text-transform: uppercase;
  color: var(--text-muted); padding-bottom: 12px; border-bottom: 1px solid var(--border-muted);
}
.learn-rung {
  display: grid; grid-template-columns: 4px 1fr; gap: 20px; align-items: stretch;
  padding: 22px 0; border-bottom: 1px solid var(--border-muted);
}
.learn-rung__bar { border-radius: 999px; background: var(--text-muted); }
.learn-rung__body { display: grid; grid-template-columns: 240px 1fr; gap: 24px; align-items: start; }
.learn-rung__say { font-family: var(--serif); font-size: 21px; font-weight: 700; color: var(--text-primary); line-height: 1.35; }
.learn-rung__rom { font-size: 12.5px; color: var(--text-muted); margin-top: 5px; letter-spacing: .03em; }
.learn-rung__lit { font-size: 13px; color: var(--text-secondary); margin-top: 8px; font-style: italic; }
.learn-rung__verdict { font-size: 11px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; margin-bottom: 7px; }
.learn-rung__lands { font-size: 15.5px; color: var(--text-secondary); line-height: 1.7; }
.learn-rung__lands b { color: var(--text-primary); }

/* 판정 4색 — 새 브랜드 색을 만들지 않고 의미색만 정의한다 */
.learn-rung--safe .learn-rung__bar { background: #4ade80; }
.learn-rung--safe .learn-rung__verdict { color: #4ade80; }
.learn-rung--pro  .learn-rung__bar { background: #60a5fa; }
.learn-rung--pro  .learn-rung__verdict { color: #60a5fa; }
.learn-rung--odd  .learn-rung__bar { background: #fbbf24; }
.learn-rung--odd  .learn-rung__verdict { color: #fbbf24; }
.learn-rung--bad  .learn-rung__bar { background: #f87171; }
.learn-rung--bad  .learn-rung__verdict { color: #f87171; }
@media (max-width: 720px) {
  .learn-rung__body { grid-template-columns: 1fr; gap: 12px; }
}

/* ── 칸 사이 이동 ── */
.learn-pager {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border-muted);
  font-size: 15px;
}
.learn-pager a { color: var(--accent-primary); text-decoration: none; }
.learn-pager a:hover { text-decoration: underline; }
.learn-pager span { color: var(--text-muted); }

/* ── 사전 연결 칩 ── */
.learn-words { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 14px; }
.learn-word {
  display: inline-block; padding: 7px 14px; border-radius: 999px;
  background: rgba(255,255,255,.04); border: 1px solid var(--border-muted);
  font-size: 15px; color: var(--text-primary); text-decoration: none;
  transition: border-color .2s ease;
}
.learn-word:hover { border-color: var(--accent-primary); }
.learn-word small { color: var(--text-muted); font-size: 12.5px; margin-left: 5px; }