/* ==========================================================
   せせらぎとは（seseragi.php）
   ========================================================== */
.ssg-sese { padding: 64px 20px 104px; }
.ssg-sese__inner { max-width: 1000px; margin: 0 auto; }

/* ---------- タブ ---------- */
.ssg-tabs { position: relative; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(8px, 1.4vw, 14px); margin-bottom: 28px; }
.ssg-tabs__btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 64px;
  padding: 16px 10px;
  border-radius: 14px;
  border: 2px solid var(--ssg-green);
  background: #fff;
  color: var(--ssg-deep);
  font: inherit;
  cursor: pointer;
  transition: background-color .45s var(--ssg-ease), color .45s var(--ssg-ease), border-color .45s;
}
.ssg-tabs__btn:hover, .ssg-tabs__btn.is-active { background: var(--ssg-deep); border-color: var(--ssg-deep); color: #fff; }
.ssg-tabs__leaf { width: 16px; height: 16px; flex: none; background: var(--ssg-green); border-radius: 0 100% 0 100%; transform: rotate(-8deg); }
.ssg-tabs__btn.is-active .ssg-tabs__leaf { background: var(--ssg-yellow); }
.ssg-tabs__lbl { font-family: "Mochiy Pop One", sans-serif; font-size: clamp(14px, 2vw, 19px); line-height: 1.5; text-align: center; }
.ssg-tabs__lbl > span { display: inline-block; }
/* 選択中のタブの下に三角 */
.ssg-tabs__btn.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -11px;
  margin-left: -10px;
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid var(--ssg-deep);
  animation: ssgTri .45s var(--ssg-ease) both;
}
@keyframes ssgTri { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
@media (max-width: 767px) {
  .ssg-tabs__lbl { font-size: 16px; line-height: 1.35; }
  .ssg-tabs__lbl > span { display: block; white-space: nowrap; }
}
@media (max-width: 600px) {
  .ssg-tabs__btn { flex-direction: column; gap: 4px; padding: 12px 4px; }
}

/* ---------- 本文の箱 ---------- */
.ssg-sese__box { position: relative; overflow: hidden; border-radius: 40px; padding: clamp(28px, 5vw, 64px); }
.ssg-sese__corner { position: absolute; right: -40px; bottom: -40px; width: 96px; height: 96px; background: var(--ssg-pale); border-radius: 0 100% 0 100%; }
.ssg-sese__panel { position: relative; }
.ssg-sese__panel.is-active { animation: ssgTabFade .45s ease both; }
@keyframes ssgTabFade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .ssg-sese__panel.is-active, .ssg-tabs__btn.is-active::after { animation: none; } }

.ssg-sese__ttl { display: flex; align-items: center; gap: 12px; margin: 0 0 18px; }
.ssg-sese__ttl h2 { margin: 0; font-family: "Mochiy Pop One", sans-serif; font-size: clamp(21px, 2.4vw, 26px); line-height: 1.4; color: var(--ssg-dark); white-space: nowrap; }
.ssg-sese__line { flex: 1; min-width: 16px; height: 2px; background: var(--ssg-line); border-radius: 2px; align-self: center; }
.ssg-sese__en { font-family: "Fredoka", sans-serif; font-weight: 600; font-size: 14px; letter-spacing: .1em; color: var(--ssg-green); white-space: nowrap; }
.ssg-sese__img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 20px; display: block; margin: 0 0 28px; }
.ssg-sese__lead { margin: 0 0 16px; color: var(--ssg-deep); font-weight: 700; font-size: clamp(18px, 2vw, 20px); line-height: 1.9; }
.ssg-sese__catch { margin: 0 0 8px; text-align: center; }
.ssg-sese__marker { font-weight: 700; background: linear-gradient(transparent 60%, #EAF5DC 60%); }
.ssg-sese__h3 {
  margin: 36px 0 14px;
  padding: 12px 0;
  border-top: 2px solid var(--ssg-line);
  border-bottom: 2px solid var(--ssg-line);
  font-family: "Mochiy Pop One", sans-serif;
  font-size: clamp(19px, 2.5vw, 22px);
  line-height: 1.6;
  word-break: normal;
  text-wrap: wrap;
  color: var(--ssg-deep);
  display: flex;
  gap: 10px;
  align-items: center;
}
.ssg-sese__p { margin: 0 0 14px; }
.ssg-sese__p:last-child { margin-bottom: 0; }
.ssg-sese__p--intro { margin-bottom: 8px; }
@media (max-width: 767px) {
  .ssg-sese__h3 { justify-content: center; text-align: center; word-break: auto-phrase; text-wrap: balance; }
}