/* ----------------------------------------------------------
   トップ：スケジュールの下「3つの活動」入口（2026-10-14 坂本さん依頼）
   スポーツ／文化活動／AIラボへ、思わずクリックしたくなるカード
   ---------------------------------------------------------- */
.top-activities {
  position: relative;
  padding: 72px 0 88px;
  background:
    radial-gradient(circle at 8% 12%, rgba(232, 168, 23, .16) 0 120px, transparent 121px),
    radial-gradient(circle at 92% 88%, rgba(26, 107, 60, .12) 0 160px, transparent 161px),
    var(--bg, #faf8f3);
  overflow: hidden;
}
.top-activities__head { text-align: center; margin-bottom: 40px; }
.top-activities__kicker {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--accent, #e8a817);
  color: #fff;
  font-weight: 700;
  font-size: .9rem;
  letter-spacing: .08em;
  transform: rotate(-2deg);
}
.top-activities__title {
  margin: 14px 0 10px;
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  color: var(--primary-dark, #124d2b);
  line-height: 1.35;
}
.top-activities__lede { color: var(--text-mid, #526658); line-height: 1.9; margin: 0; }

.top-activities__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}
.act-card {
  --c: #1a6b3c;
  --c-soft: #e6f3eb;
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: 22px;
  background: #fff;
  color: var(--text-dark, #2a332c);
  text-decoration: none;
  box-shadow: 0 6px 0 var(--c), 0 18px 40px rgba(18, 77, 43, .12);
  transition: transform .25s cubic-bezier(.2, .8, .2, 1.2), box-shadow .25s ease;
  overflow: hidden;
  isolation: isolate;
}
.act-card--culture { --c: #d68a00; --c-soft: #fdf1d6; }
.act-card--ai      { --c: #2b5fa8; --c-soft: #e3ecf8; }
.act-card:hover,
.act-card:focus-visible {
  transform: translateY(-8px) rotate(-.6deg);
  box-shadow: 0 12px 0 var(--c), 0 26px 50px rgba(18, 77, 43, .18);
}
.act-card:focus-visible { outline: 3px solid var(--accent, #e8a817); outline-offset: 4px; }

.act-card__visual {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: var(--c-soft);
}
.act-card__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .6s ease;
}
.act-card:hover .act-card__visual img { transform: scale(1.08); }
.act-card__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(0, 0, 0, .35));
}
.act-card__num {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 1;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--c);
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  box-shadow: 0 4px 0 rgba(0, 0, 0, .15);
}
.act-card__icon {
  position: absolute;
  right: 14px;
  bottom: -26px;
  z-index: 2;
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 6px 16px rgba(0, 0, 0, .14);
  transition: transform .35s cubic-bezier(.2, .8, .2, 1.4);
}
.act-card__icon img { width: 40px; height: 40px; }
.act-card:hover .act-card__icon { transform: rotate(-12deg) scale(1.12); }

.act-card__body { padding: 24px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.act-card__label { margin: 0; font-size: .85rem; font-weight: 700; color: var(--c); letter-spacing: .06em; }
.act-card__name { margin: 4px 0 10px; font-size: 1.45rem; color: var(--primary-dark, #124d2b); line-height: 1.35; }
.act-card__text { margin: 0 0 14px; line-height: 1.85; color: var(--text-mid, #526658); font-size: .97rem; }
.act-card__chips { list-style: none; margin: 0 0 18px; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.act-card__chips li {
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--c-soft);
  color: var(--c);
  font-size: .85rem;
  font-weight: 700;
}
.act-card__cta {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 14px;
  background: var(--c);
  color: #fff;
  font-weight: 700;
}
.act-card__cta i {
  font-style: normal;
  display: inline-block;
  transition: transform .25s ease;
}
.act-card:hover .act-card__cta i { transform: translateX(6px); animation: act-nudge .9s ease-in-out infinite; }
@keyframes act-nudge { 0%, 100% { transform: translateX(2px); } 50% { transform: translateX(8px); } }

.top-activities__note { text-align: center; margin: 28px 0 0; font-size: .85rem; color: var(--text-light, #809987); }

@media (max-width: 900px) {
  .top-activities__grid { grid-template-columns: 1fr; gap: 26px; max-width: 520px; margin: 0 auto; }
  .top-activities { padding: 56px 0 72px; }
}
@media (prefers-reduced-motion: reduce) {
  .act-card, .act-card__visual img, .act-card__icon, .act-card__cta i { transition: none; }
  .act-card:hover .act-card__cta i { animation: none; }
  .act-card:hover, .act-card:focus-visible { transform: none; }
}
.top-activities > .container { max-width: 1160px; }