/* ===== About Page ===== */

/* ── 概要セクション ── */
.about-intro {
  background: var(--washi);
  padding: var(--section-padding);
}

.about-intro-body {
  max-width: 720px;
  margin: 0 auto;
}

.about-intro-text {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.05rem;
  line-height: 2.3;
  letter-spacing: 0.06em;
  color: var(--text-on-light);
}

/* ── タイムラインセクション ── */
.timeline-section {
  background: var(--grad-section-dark);
  color: var(--text-on-dark);
  padding: var(--section-padding);
}

.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

/* 縦のゴールドライン */
.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 100px;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--gold), transparent);
}

.timeline-item {
  display: flex;
  gap: 40px;
  margin-bottom: 48px;
  position: relative;
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-year-wrap {
  flex-shrink: 0;
  width: 100px;
  text-align: right;
  padding-top: 4px;
}

.timeline-era {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--gold-light);
  display: block;
}

.timeline-year {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.72rem;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  display: block;
  margin-top: 2px;
}

/* タイムラインの点 */
.timeline-dot {
  position: absolute;
  left: 96px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  flex-shrink: 0;
  z-index: 1;
}

.timeline-content {
  padding-left: 24px;
  flex: 1;
}

.timeline-event {
  font-family: 'Noto Serif JP', serif;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--white);
  margin-bottom: 8px;
}

.timeline-desc {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.85rem;
  line-height: 1.9;
  color: var(--text-muted);
}

@media (max-width: 600px) {
  .timeline::before { left: 72px; }
  .timeline-year-wrap { width: 72px; }
  .timeline-dot { left: 68px; }
  .timeline-item { gap: 24px; }
  .timeline-content { padding-left: 20px; }
}

/* ── 境内紹介セクション ── */
.grounds-section {
  background: var(--washi-deep);
  padding: var(--section-padding);
}

.grounds-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.ground-item {}

.ground-photo {
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
  margin-bottom: 24px;
  position: relative;
}

.ground-photo-bg {
  width: 100%;
  height: 100%;
  background: var(--grad-section-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  transition: transform 0.5s ease;
}

.ground-item:hover .ground-photo-bg { transform: scale(1.04); }

.ground-photo::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(26,22,18,0.35) 100%);
}

.ground-name {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--text-on-light);
  margin-bottom: 12px;
}

.ground-desc {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.88rem;
  line-height: 2;
  color: var(--text-light);
}

@media (max-width: 768px) {
  .grounds-grid { grid-template-columns: 1fr; }
}