/* ============================================================
   BitStat2(앱 사이트) 홈 UI — .bs- 접두사로 스코프 (다른 페이지 무영향)
   설계: 2026-07-06 홈 전면 개선 (다이어그램: images/index-ui-redesign.svg)
   짝 저장소 BitStat2-quarto assets/home.css 구조를 이식,
   팔레트는 본 사이트 Tufte 톤(크림·잉크·벽돌색)으로 통일.
   ============================================================ */

.bs-home {
  --bs-ink: #1a1a1a;
  --bs-muted: #55534a;
  --bs-faint: #8a8578;
  --bs-hairline: #dcd8c8;
  --bs-accent: #8a1500;
  --bs-accent-ink: #6d1000;
  --bs-accent-soft: #f5ede9;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
  color: var(--bs-ink);
  line-height: 1.65;
}

/* ---- 히어로 ---- */
.bs-hero { padding: 3rem 0 2.25rem; }
.bs-eyebrow {
  font-size: .82rem; font-weight: 600; letter-spacing: .16em;
  text-transform: uppercase; color: var(--bs-accent);
  margin-bottom: .75rem;
}
.bs-h1 {
  font-size: clamp(1.9rem, 5vw, 2.8rem); font-weight: 700;
  letter-spacing: -.01em; line-height: 1.2;
  margin: 0 0 1rem; border: none; padding: 0;
}
.bs-lede {
  font-size: 1.12rem; color: var(--bs-muted);
  max-width: 40em; margin-bottom: 1.4rem;
}
.bs-lede strong { color: var(--bs-ink); font-weight: 600; }
.bs-hero-meta {
  display: flex; flex-wrap: wrap; gap: .4rem 1.4rem;
  font-size: .85rem; color: var(--bs-faint); margin-bottom: 1.6rem;
}
.bs-hero-meta span::before { content: "— "; color: var(--bs-hairline); }
.bs-cta { display: flex; flex-wrap: wrap; gap: .75rem; }
.bs-btn {
  display: inline-block; padding: .6rem 1.15rem; border-radius: 6px;
  font-size: .95rem; font-weight: 600; text-decoration: none;
  transition: background-color .15s, border-color .15s;
}
.bs-btn-primary { background: var(--bs-accent); color: #fffff8 !important; }
.bs-btn-primary:hover { background: var(--bs-accent-ink); }
.bs-btn-ghost {
  border: 1px solid var(--bs-hairline); color: var(--bs-ink) !important;
}
.bs-btn-ghost:hover { border-color: var(--bs-faint); }

/* ---- 로딩 안내 (Tufte: 정직한 기대 관리, 잉크 최소) ---- */
.bs-loading-note {
  margin: 2.25rem 0 0; font-size: .85rem; color: var(--bs-muted);
  padding-top: .5rem; border-top: 2px solid var(--bs-hairline);
  max-width: 46em;
}
.bs-loading-note b { color: var(--bs-accent); font-weight: 600; }

/* ---- 학습 방식 3요소 ---- */
.bs-how {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem; padding: 2rem 0;
  border-top: 1px solid var(--bs-hairline);
  border-bottom: 1px solid var(--bs-hairline);
}
.bs-how h3 {
  font-size: 1rem; font-weight: 700; margin: 0 0 .4rem;
  border: none; padding: 0;
}
.bs-how h3 code {
  font-size: .85em; color: var(--bs-accent); background: var(--bs-accent-soft);
  padding: .1em .35em; border-radius: 4px;
}
.bs-how p { font-size: .92rem; color: var(--bs-muted); margin: 0; }

/* ---- 추천 앱 스트립 (quarto listing 감싸기) ---- */
.bs-featured { padding: 2rem 0 .5rem; }
.bs-featured-head { display: flex; align-items: baseline; gap: 1rem; margin-bottom: .25rem; }
.bs-featured-head h2 {
  font-size: 1.4rem; font-weight: 700; margin: 0;
  border: none; padding: 0;
}
.bs-featured-head .bs-legend { font-size: .82rem; color: var(--bs-faint); }

/* ---- 커리큘럼 맵 ---- */
.bs-map { padding-top: 2.25rem; }
.bs-map-head { display: flex; align-items: baseline; gap: 1rem; margin-bottom: 1.4rem; }
.bs-map-head h2 {
  font-size: 1.4rem; font-weight: 700; margin: 0;
  border: none; padding: 0;
}
.bs-map-head .bs-legend { font-size: .82rem; color: var(--bs-faint); }
.bs-legend b { color: var(--bs-accent); font-weight: 600; }
.bs-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1rem;
}
.bs-ch {
  border: 1px solid var(--bs-hairline); border-radius: 8px;
  padding: 1.15rem 1.25rem 1rem; background: #fff;
  transition: border-color .15s;
}
.bs-ch:hover { border-color: var(--bs-faint); }
.bs-ch-no {
  font-size: .78rem; font-weight: 600; color: var(--bs-faint);
  letter-spacing: .08em;
}
.bs-ch h3 {
  font-size: 1.08rem; font-weight: 700; margin: .15rem 0 .1rem;
  border: none; padding: 0;
}
.bs-ch h3 a { color: inherit; text-decoration: none; }
.bs-ch h3 a:hover { color: var(--bs-accent); }
.bs-ch-sub { font-size: .82rem; color: var(--bs-faint); margin: 0 0 .75rem; }
.bs-ch ul { list-style: none; margin: 0; padding: 0; }
.bs-ch li {
  font-size: .92rem; padding: .3rem 0;
  border-top: 1px solid #efece0;
  color: var(--bs-muted);
}
.bs-ch li::before { content: "● "; color: var(--bs-accent); }
.bs-ch li a { color: var(--bs-ink); text-decoration: none; }
.bs-ch li a:hover { color: var(--bs-accent); text-decoration: underline; }
.bs-ch-cross {
  display: block; margin-top: .75rem; font-size: .8rem;
  color: var(--bs-faint);
}

/* ---- 푸터 노트 ---- */
.bs-note {
  margin-top: 2.5rem; padding-top: 1.25rem;
  border-top: 1px solid var(--bs-hairline);
  font-size: .85rem; color: var(--bs-faint); max-width: 46em;
}
.bs-note a { color: var(--bs-muted); }