/* ============================================
   HOTARU UNIT PAGE
   儚さ × 孤高 × 絶対的存在
============================================ */

/* 全体背景 */
body {
  background: linear-gradient(135deg, #1a0f14, #2a131c);
  color: #fdf6f9;
  font-family: "Noto Sans JP", sans-serif;
  margin: 0;
  padding: 0;
}

/* =============================
   ヒーローカード
============================= */
.hero-card {
  width: 90%;
  max-width: 1200px;
  margin: 50px auto;
  display: flex;
  align-items: center;

  background: linear-gradient(
    135deg,
    rgba(194, 24, 91, 0.9),
    rgba(90, 10, 40, 0.95)
  );

  border-radius: 22px;
  padding: 35px;
  box-shadow:
    0 0 25px rgba(194, 24, 91, 0.5),
    0 0 50px rgba(248, 187, 208, 0.15);

  overflow: hidden;
}

/* テキスト */
.hero-text {
  flex: 1;
  padding-right: 20px;
  font-size: 20px;
  color: #ffffff;
  font-weight: bold;
  text-shadow: 0 0 10px rgba(0,0,0,0.4);
  opacity: 0;
  animation: textFade 2.5s ease forwards 0.5s;
}

.hero-img {
  flex: 1;
  width: 100%;
  max-width: 500px;
  border-radius: 15px;
  opacity: 0;
  animation: logoFade 2.5s ease forwards 1s;
}

/* フェードインアニメーション */
@keyframes textFade {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes logoFade {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* =============================
   セクション共通
============================= */
section {
  max-width: 1000px;
  margin: 55px auto;
  padding: 30px 25px;
  background: rgba(30, 15, 20, 0.85);
  border-radius: 18px;
  box-shadow: 0 0 20px rgba(194, 24, 91, 0.25);
}

/* 見出し */
h2 {
  font-size: 1.9rem;
  margin-bottom: 25px;
  padding: 12px 18px;

  background: linear-gradient(
    135deg,
    #c2185b,
    #f48fb1
  );

  border-radius: 14px;
  color: #fff;
  text-shadow: 0 0 8px rgba(0,0,0,0.4);
}

/* 本文 */
p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #fdf6f9;
}

/* =============================
   楽曲一覧
============================= */
.song-list {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
}

.song-item {
  width: 220px;
  transition: 0.35s ease;
}

.song-img {
  width: 100%;
  border-radius: 16px;
  box-shadow:
    0 0 18px rgba(194, 24, 91, 0.35);
  transition: 0.35s ease;
}

.song-item:hover {
  transform: translateY(-6px) scale(1.05);
}

.song-item:hover .song-img {
  box-shadow:
    0 0 30px rgba(248, 187, 208, 0.75);
}

/* =============================
   戻るボタン
============================= */
.back-btn {
  display: block;
  width: fit-content;
  margin: 40px auto;

  padding: 10px 18px;
  border-radius: 12px;
  background: linear-gradient(
    45deg,
    #c2185b,
    #f48fb1
  );

  color: #fff;
  text-decoration: none;
  box-shadow: 0 0 15px rgba(248, 187, 208, 0.6);
  transition: 0.3s ease;
}

.back-btn:hover {
  transform: scale(1.07);
  box-shadow: 0 0 25px rgba(248, 187, 208, 0.85);
}

/* =============================
   レスポンシブ
============================= */
@media (max-width: 768px) {
  .hero-card {
    flex-direction: column;
    text-align: center;
  }

  .hero-text {
    margin-bottom: 20px;
  }

  .song-item {
    width: 45%;
  }
}





body {
  background: linear-gradient(135deg, #1a0f14, #2a131c);
  color: #fdf6f9;
  font-family: "Noto Sans JP", sans-serif;
  line-height: 1.6;
}



.song-detail-card {
    width: 80%;
    margin: 40px auto;

    background: linear-gradient(
        135deg,
        rgba(194, 24, 91, 0.92),
        rgba(90, 10, 40, 0.95)
    );

    border-radius: 20px;
    padding: 25px;

    box-shadow:
        0 0 22px rgba(194, 24, 91, 0.45),
        0 0 45px rgba(248, 187, 208, 0.15);

    border: 2px solid rgba(248, 187, 208, 0.45);

    transition: transform 0.3s ease, box-shadow 0.3s ease;
}



.song-title {
    color: #ffffff;
    font-size: 28px;

    text-shadow:
        0 0 8px rgba(0,0,0,0.4),
        0 0 12px rgba(248,187,208,0.6);

    margin-bottom: 10px;

    border-bottom: 3px solid;
    border-image: linear-gradient(
        90deg,
        #c2185b,
        #f48fb1
    ) 1;
}



.song-description {
    color: #fdf6f9;
    font-size: 1.1rem;
    line-height: 1.8;
    text-shadow: 0 0 6px rgba(0,0,0,0.35);
}



.song-footer {
    clear: both;
    margin-top: 25px;
    padding-top: 15px;

    border-top: 2px solid rgba(248, 187, 208, 0.6);

    display: flex;
    gap: 25px;

    font-size: 14px;
    color: #fdf6f9;
    text-shadow: 0 0 6px rgba(0,0,0,0.3);
}




.back-btn {
  display: block;
  width: fit-content;
  margin: 40px auto;

  padding: 10px 18px;
  border-radius: 12px;

  background: linear-gradient(
    45deg,
    #c2185b,
    #f48fb1
  );

  color: #fff;
  text-decoration: none;
  box-shadow: 0 0 15px rgba(248, 187, 208, 0.6);
  transition: 0.3s ease;
}

.back-btn:hover {
  transform: scale(1.07);
  box-shadow: 0 0 25px rgba(248, 187, 208, 0.85);
}