/* ============================================================
   page-sirocco-fan-cycle.css — 시로코팬 교체 주기 (연차별 열화 타임라인)
   Title: Noto Serif KR 700 / Body: Noto Sans KR 400
   Layout signature: 연차별 부품 열화 가로 스크롤 타임라인
   ============================================================ */

:root {
  --cta-primary: #B45309;
  --cta-secondary: #FEF7ED;
  --sfc-ink: #7C2D12;
  --sfc-amber: #B45309;
  --sfc-bg: #FEF7ED;
  --sfc-r-xs: 3px;
  --sfc-r-sm: 10px;
  --sfc-r-lg: 22px;
  --sfc-pad-y: 60px;
}

body { font-family: 'Noto Sans KR', sans-serif; font-weight: 400; background: var(--sfc-bg); color: #431407; }
h1, h2, h3 { font-family: 'Noto Serif KR', serif; font-weight: 700; color: var(--sfc-ink); }

/* divider: small diamond, distinct from sibling pages' plain bar */
.sfc-divider {
  display: block; width: 12px; height: 12px; background: var(--sfc-amber);
  transform: rotate(45deg); border-radius: var(--sfc-r-xs); margin: 0 auto 22px;
}

/* ---- hero ---- */
.sfc-hero { max-width: 820px; margin: 0 auto; padding: 58px 20px 8px; text-align: center; }
.sfc-hero h1 { font-size: clamp(1.8rem, 5vw, 2.5rem); margin-bottom: 18px; }
.sfc-hero p { color: #57291a; line-height: 1.9; font-size: 1rem; }

/* ---- generic section shell ---- */
.sfc-section { max-width: 1040px; margin: 0 auto; padding: var(--sfc-pad-y) 20px 0; text-align: center; }
.sfc-timeline-section { max-width: 1100px; margin: 0 auto; padding: var(--sfc-pad-y) 20px 0; text-align: center; }
.sfc-section h2, .sfc-timeline-section h2 { font-size: 1.4rem; margin-bottom: 12px; }
.sfc-lead { max-width: 720px; margin: 0 auto 28px; color: #57291a; line-height: 1.85; }

/* ---- 체크리스트 카드: 부품별 열화 메커니즘 ---- */
.sfc-check-grid {
  max-width: 760px; margin: 0 auto; display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 18px; text-align: left;
}
@media (max-width: 480px) {
  .sfc-check-grid { grid-template-columns: 1fr; }
}
.sfc-check-card {
  display: flex; gap: 14px; align-items: flex-start; background: #fff; border: 1px solid #F3D9B1;
  border-radius: var(--sfc-r-sm); padding: 20px 22px;
}
.sfc-check-card svg { flex-shrink: 0; margin-top: 2px; }
.sfc-check-card h3 { font-size: 1rem; margin-bottom: 6px; }
.sfc-check-card p { font-size: .92rem; color: #5C3A25; line-height: 1.8; margin: 0; }

/* ---- signature: 연차별 가로 스크롤 타임라인 ---- */
.sfc-timeline-scroll {
  overflow-x: auto; padding: 6px 4px 18px; scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}
.sfc-timeline {
  list-style: none; display: flex; gap: 18px; width: max-content; margin: 0 auto; padding: 0 4px;
}
.sfc-year-card {
  scroll-snap-align: start; flex: 0 0 240px; background: #fff; border: 1px solid #F3D9B1;
  border-top: 5px solid var(--sfc-amber); border-radius: var(--sfc-r-sm); padding: 20px 18px; text-align: left;
}
.sfc-year-card--last { border-top-color: var(--sfc-ink); background: #FFF7EC; }
.sfc-year-badge {
  display: inline-block; font-family: 'Noto Serif KR', serif; font-weight: 700; color: var(--sfc-ink);
  font-size: .96rem; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px dashed #E5B679; width: 100%;
}
.sfc-year-card dl { margin: 0; }
.sfc-year-card dt { font-size: .82rem; font-weight: 700; color: var(--sfc-amber); margin-top: 10px; }
.sfc-year-card dt:first-child { margin-top: 0; }
.sfc-year-card dd { font-size: .86rem; color: #5C3A25; line-height: 1.6; margin: 2px 0 0; }
.sfc-summary-note {
  max-width: 800px; margin: 8px auto 0; color: #7C2D12; font-size: .92rem;
  background: #FDECD1; border-radius: var(--sfc-r-sm); padding: 14px 18px; text-align: left;
}

/* ---- 시나리오 케이스 카드: 사용 환경 ---- */
.sfc-scenario-grid {
  max-width: 980px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px; text-align: left;
}
.sfc-scenario-card {
  background: #fff; border: 1px solid #F3D9B1; border-radius: var(--sfc-r-lg);
  padding: 24px 22px; position: relative;
}
.sfc-scenario-card::before {
  content: ""; display: block; width: 30px; height: 3px; background: var(--sfc-amber);
  border-radius: var(--sfc-r-xs); margin-bottom: 14px;
}
.sfc-scenario-card h3 { font-size: 1.02rem; margin-bottom: 10px; }
.sfc-scenario-card p { font-size: .92rem; color: #5C3A25; line-height: 1.8; margin: 0; }

/* ---- FAQ accordion ---- */
.sfc-faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; text-align: left; }
.sfc-faq details {
  border: 1px solid #F3D9B1; border-radius: var(--sfc-r-sm); padding: 4px 20px; background: #fff;
}
.sfc-faq summary { padding: 16px 0; font-weight: 700; color: var(--sfc-ink); font-size: .98rem; position: relative; padding-right: 28px; cursor: pointer; }
.sfc-faq summary::after { content: "+"; position: absolute; right: 0; top: 14px; font-size: 1.3rem; color: var(--sfc-amber); font-weight: 700; }
.sfc-faq details[open] summary::after { content: "\2212"; }
.sfc-faq details p { padding: 0 0 16px; margin: 0; color: #5C3A25; font-size: .92rem; line-height: 1.8; }

.cta { background: #fff; }

/* ---- exactly one animation type on this page: hover ---- */
.sfc-check-card,
.sfc-year-card,
.sfc-scenario-card,
.sfc-faq details {
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.sfc-check-card:hover { transform: translateY(-3px); border-color: var(--sfc-amber); }
.sfc-year-card:hover { transform: translateY(-4px); box-shadow: 0 10px 22px -12px rgba(124,45,18,.3); }
.sfc-scenario-card:hover { transform: translateY(-3px); box-shadow: 0 10px 22px -12px rgba(124,45,18,.25); }
.sfc-faq details:hover { box-shadow: 0 8px 18px -12px rgba(124,45,18,.25); }
@media (prefers-reduced-motion: reduce) {
  .sfc-check-card, .sfc-year-card, .sfc-scenario-card, .sfc-faq details { transition: none; }
}

@media (max-width: 480px) {
  .sfc-section, .sfc-timeline-section { padding: 44px 16px 0; }
  .sfc-section h2, .sfc-timeline-section h2 { font-size: 1.2rem; }
  .sfc-check-card { padding: 18px 16px; }
  .sfc-year-card { flex-basis: 210px; padding: 18px 14px; }
}

/* ---- site photo: 4:3 crop (요청 반영) ---- */
.photo-row img { aspect-ratio: 4 / 3; }