/* ============================================================
   page-sirocco-fan-motor-detail.css — 시로코팬 모터 교체 (부분교체 조건 · 절연저항 · 결선상 · 전류값)
   Title: Sunflower 700 / Body: Noto Sans KR 400
   Layout signature: 다크 테마 전면 적용 + 안전 옐로 좌측 경고선 카드 + 아코디언 FAQ
   ============================================================ */

:root {
  --cta-primary: #18181B;
  --cta-secondary: #FAFAFA;
  --sfm-bg: #18181B;
  --sfm-bg-raised: #232326;
  --sfm-bg-sunken: #111113;
  --sfm-text: #FAFAFA;
  --sfm-text-dim: #D4D4D8;
  --sfm-text-mute: #A1A1AA;
  --sfm-yellow: #FACC15;
  --sfm-border: #3F3F46;
  --sfm-r-sm: 4px;
  --sfm-r-md: 14px;
  --sfm-r-lg: 26px;
  --sfm-pad-y: 64px;
}

body { font-family: 'Noto Sans KR', sans-serif; font-weight: 400; background: var(--sfm-bg); color: var(--sfm-text); }
h1, h2, h3 { font-family: 'Sunflower', sans-serif; font-weight: 700; letter-spacing: -.01em; color: var(--sfm-text); }

main { background: var(--sfm-bg); }

.sfm-divider { display: block; width: 40px; height: 4px; background: var(--sfm-yellow); border-radius: var(--sfm-r-sm); margin: 0 auto 20px; }

/* ---- hero ---- */
.sfm-hero { max-width: 840px; margin: 0 auto; padding: 56px 20px 10px; text-align: center; }
.sfm-hero h1 { font-size: clamp(1.8rem, 5vw, 2.5rem); margin-bottom: 16px; }
.sfm-hero p { color: var(--sfm-text-dim); line-height: 1.85; font-size: 1rem; }

/* ---- generic section shell ---- */
.sfm-section { max-width: 1020px; margin: 0 auto; padding: var(--sfm-pad-y) 20px 0; text-align: center; }
.sfm-section h2 { font-size: 1.4rem; margin-bottom: 10px; }
.sfm-lead { max-width: 740px; margin: 0 auto 26px; color: var(--sfm-text-dim); line-height: 1.8; text-align: center; }
.sfm-section .sfm-table-wrap,
.sfm-section .sfm-glossary,
.sfm-section .sfm-cond-list,
.sfm-section p:not(.sfm-lead) { text-align: left; }
.sfm-section > p:not(.sfm-lead) { max-width: 780px; margin: 0 auto; line-height: 1.85; color: var(--sfm-text-dim); }
.sfm-summary-note {
  max-width: 780px; margin: 18px auto 0; color: #FEF9C3; font-size: .92rem;
  background: rgba(250,204,21,.1); border: 1px solid rgba(250,204,21,.3);
  border-radius: var(--sfm-r-sm); padding: 12px 16px; text-align: left;
}

/* ---- 모터만 교체 가능한 조건 : 리스트 ---- */
.sfm-cond-list { max-width: 780px; margin: 0 auto; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 10px; }
.sfm-cond-list li {
  background: var(--sfm-bg-raised); border-left: 3px solid var(--sfm-yellow); border-radius: var(--sfm-r-sm);
  padding: 14px 18px; color: var(--sfm-text-dim); line-height: 1.8; font-size: .95rem;
}
.sfm-cond-list li strong { color: var(--sfm-text); }

/* ---- VS 비교 섹션 (기존 다크 강조 섹션 → 사운큰 톤으로 유지) ---- */
.sfm-compare {
  background: var(--sfm-bg-sunken); color: var(--sfm-text); max-width: none; padding: var(--sfm-pad-y) 20px;
  margin-top: var(--sfm-pad-y); border-radius: var(--sfm-r-lg); border: 1px solid var(--sfm-border);
}
.sfm-compare h2 { color: var(--sfm-text); text-align: center; }
.sfm-compare .sfm-lead { color: var(--sfm-text-dim); }
.sfm-compare .sfm-summary-note { background: rgba(250,204,21,.1); color: #FEF9C3; }

.sfm-compare-grid {
  max-width: 900px; margin: 0 auto; display: grid; grid-template-columns: 1fr auto 1fr;
  gap: 20px; align-items: stretch;
}
.sfm-compare-card {
  background: var(--sfm-bg-raised); border: 1px solid var(--sfm-border); border-left: 3px solid var(--sfm-yellow);
  border-radius: var(--sfm-r-md); padding: 26px 22px; text-align: left;
}
.sfm-compare-icon { margin-bottom: 12px; }
.sfm-compare-card h3 { color: var(--sfm-text); font-size: 1.08rem; margin-bottom: 10px; }
.sfm-compare-card p { color: var(--sfm-text-dim); font-size: .93rem; line-height: 1.8; margin: 0; }
.sfm-vs {
  align-self: center; font-family: 'Sunflower', sans-serif; font-weight: 700; color: var(--sfm-yellow);
  font-size: 1.1rem; padding: 6px 10px; border: 2px solid var(--sfm-yellow); border-radius: 999px;
}

/* ---- spec table ---- */
.sfm-table-wrap { overflow-x: auto; border: 1px solid var(--sfm-border); border-radius: var(--sfm-r-md); max-width: 880px; margin: 0 auto; }
.sfm-table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: .92rem; }
.sfm-table caption { text-align: left; font-weight: 700; padding: 14px 18px; background: var(--sfm-bg-raised); color: var(--sfm-text); }
.sfm-table th, .sfm-table td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--sfm-border); color: var(--sfm-text-dim); }
.sfm-table thead th { background: var(--sfm-bg-sunken); color: var(--sfm-text); font-weight: 700; }
.sfm-table tbody th { white-space: nowrap; color: var(--sfm-yellow); font-weight: 700; background: rgba(250,204,21,.06); }
.sfm-table tbody tr:last-child th, .sfm-table tbody tr:last-child td { border-bottom: none; }

/* ---- 모터 교체 절차 : 경고선 카드 (절연저항 · 결선상 · 전류값 포함) ---- */
.sfm-procedure { padding-bottom: 0; }
.sfm-warn-list { max-width: 900px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; text-align: left; }
.sfm-warn-card {
  background: var(--sfm-bg-raised); border: 1px solid var(--sfm-border); border-left: 4px solid var(--sfm-yellow);
  border-radius: var(--sfm-r-md); padding: 20px 22px;
}
.sfm-warn-card h3 { display: flex; align-items: center; gap: 10px; font-size: 1rem; margin-bottom: 8px; color: var(--sfm-text); }
.sfm-warn-num {
  display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; flex-shrink: 0;
  border-radius: 999px; background: var(--sfm-yellow); color: #18181B; font-size: .85rem; font-weight: 700;
  font-family: 'Sunflower', sans-serif;
}
.sfm-warn-card p { color: var(--sfm-text-dim); font-size: .9rem; line-height: 1.8; margin: 0; }

/* ---- inverter check cards ---- */
.sfm-inverter { max-width: 1020px; margin: 0 auto; padding: var(--sfm-pad-y) 20px 0; text-align: center; }
.sfm-inverter h2 { font-size: 1.4rem; margin-bottom: 10px; }
.sfm-check-grid {
  max-width: 900px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px; text-align: left;
}
.sfm-check-card {
  display: flex; gap: 14px; align-items: flex-start; background: var(--sfm-bg-raised); border: 1px solid var(--sfm-border);
  border-radius: var(--sfm-r-md); padding: 18px 20px;
}
.sfm-check-card svg { flex-shrink: 0; margin-top: 2px; stroke: var(--sfm-yellow); }
.sfm-check-card h3 { font-size: .98rem; margin-bottom: 4px; color: var(--sfm-text); }
.sfm-check-card p { font-size: .9rem; color: var(--sfm-text-dim); line-height: 1.75; margin: 0; }
.sfm-check-card--caution { background: rgba(250,204,21,.06); border-left: 4px solid var(--sfm-yellow); }

/* ---- 용어정의 dl ---- */
.sfm-glossary { max-width: 900px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 4px 28px; }
.sfm-glossary dt { font-weight: 700; color: var(--sfm-yellow); margin-top: 14px; font-size: 1rem; font-family: 'Sunflower', sans-serif; }
.sfm-glossary dd { color: var(--sfm-text-dim); font-size: .92rem; margin: 4px 0 0; line-height: 1.75; }

/* ---- FAQ accordion ---- */
.sfm-faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; text-align: left; }
.sfm-faq details {
  border: 1px solid var(--sfm-border); border-radius: var(--sfm-r-md); padding: 4px 20px; background: var(--sfm-bg-raised);
}
.sfm-faq summary { padding: 15px 0; font-weight: 700; color: var(--sfm-text); font-size: .98rem; position: relative; padding-right: 28px; cursor: pointer; }
.sfm-faq summary::after { content: "+"; position: absolute; right: 0; top: 13px; font-size: 1.3rem; color: var(--sfm-yellow); font-weight: 700; }
.sfm-faq details[open] summary::after { content: "\2212"; }
.sfm-faq details p { padding: 0 0 16px; margin: 0; color: var(--sfm-text-dim); font-size: .92rem; line-height: 1.8; }

.photo-row { background: var(--sfm-bg); }
.photo-row figcaption { color: var(--sfm-text-mute); }

.cta { background: var(--sfm-bg-sunken); }
.cta-lead { color: var(--sfm-text-dim); }

/* ---- exactly one animation type on this page: hover ---- */
.sfm-compare-card,
.sfm-cond-list li,
.sfm-warn-card,
.sfm-check-card,
.sfm-table tbody tr,
.sfm-faq details {
  transition: background-color .18s ease, transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.sfm-compare-card:hover { transform: translateY(-3px); border-color: var(--sfm-yellow); }
.sfm-cond-list li:hover { transform: translateX(3px); }
.sfm-warn-card:hover { transform: translateY(-3px); box-shadow: 0 10px 22px -12px rgba(0,0,0,.5); }
.sfm-check-card:hover { transform: translateY(-3px); box-shadow: 0 10px 22px -12px rgba(0,0,0,.5); }
.sfm-table tbody tr:hover { background: rgba(250,204,21,.06); }
.sfm-faq details:hover { box-shadow: 0 8px 18px -12px rgba(0,0,0,.5); }
@media (prefers-reduced-motion: reduce) {
  .sfm-compare-card, .sfm-cond-list li, .sfm-warn-card, .sfm-check-card, .sfm-table tbody tr, .sfm-faq details { transition: none; }
}

@media (max-width: 640px) {
  .sfm-compare-grid { grid-template-columns: 1fr; }
  .sfm-vs { justify-self: center; }
}

@media (max-width: 480px) {
  .sfm-section, .sfm-inverter { padding: 46px 16px 0; }
  .sfm-compare { padding: 46px 16px; }
  .sfm-section h2, .sfm-inverter h2, .sfm-compare h2 { font-size: 1.2rem; }
  .sfm-compare-card { padding: 20px 18px; }
}