/* ===== 全体 ===== */
body {
  margin: 0;
  font-family: "Cinzel", "Noto Serif JP", serif;
  background: linear-gradient(
    180deg,
    #cfe9f7 0%,
    #eaf7e3 40%,
    #ffffff 100%
  );
  color: #2f3b2f;
}

/* ===== ヘッダー ===== */
.site-header {
  text-align: center;
  padding: 48px 16px 24px;
}

.site-header h1 {
  font-size: clamp(28px, 7vw, 52px);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  color: #3a6b4f;
  text-shadow:
    0 2px 6px rgba(255,255,255,0.8),
    0 6px 14px rgba(0,0,0,0.15);
}

/* ===== ナビ ===== */
.navbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.navbar button {
  background: linear-gradient(145deg, #8fd3a8, #b7e6c5);
  border: none;
  border-radius: 999px;
  padding: 10px 20px;
  color: #24523b;
  font-family: inherit;
  cursor: pointer;
  box-shadow:
    0 4px 10px rgba(0,0,0,0.15),
    inset 0 1px 0 rgba(255,255,255,0.8);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.navbar button:hover {
  transform: translateY(-2px);
  box-shadow:
    0 6px 14px rgba(0,0,0,0.18),
    inset 0 1px 0 rgba(255,255,255,0.9);
}

/* ===== コンテンツ枠 ===== */
.container {
  max-width: 900px;
  margin: 0 auto 80px;
  padding: 0 16px;
}

.content {
  display: none;
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(6px);
  border-radius: 22px;
  padding: 28px;
  margin-top: 36px;
  box-shadow:
    0 10px 30px rgba(0,0,0,0.12);
}

.content.active {
  display: block;
}

/* ===== 見出し ===== */
h2 {
  text-align: center;
  margin-bottom: 24px;
  letter-spacing: 0.12em;
  color: #3f7a57;
}

/* ===== テキスト ===== */
p {
  line-height: 2;
  margin-bottom: 18px;
  font-size: 15px;
}

/* ===== 音楽 ===== */
audio {
  width: 100%;
  margin-bottom: 24px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.15));
}

/* ===== 画像 ===== */
img {
  display: block;
  max-width: 100%;
  margin: 20px auto;
  border-radius: 18px;
  box-shadow:
    0 8px 20px rgba(0,0,0,0.2);
}

/* ===== リンク ===== */
a {
  color: #3b7aa8;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ===== リンク一覧 ===== */
.link-list {
  list-style: none;
  padding: 0;
  text-align: center;
}

.link-list li {
  margin: 12px 0;
}

/* ===== スマホ ===== */
@media (max-width: 600px) {
  .content {
    padding: 20px;
  }

  .site-header {
    padding-top: 36px;
  }
}

/* ===== サークルエンブレム ===== */
.emblem {
  display: flex;
  justify-content: center;
  margin-bottom: 24px;
}

.emblem img {
  width: min(320px, 80vw);
  border-radius: 24px;
  box-shadow:
    0 12px 30px rgba(0,0,0,0.25),
    inset 0 0 20px rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.4);
  padding: 12px;

  /* ★浮遊アニメーション */
  animation: floatY 6s ease-in-out infinite;
}

/* ===== ゆっくり浮く ===== */
@keyframes floatY {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
  100% {
    transform: translateY(0px);
  }
}