* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: #f5efe3;
  background:
    radial-gradient(circle at top, #2b2231 0%, #15131a 38%, #0a0a0c 100%);
  font-family:
    "Hiragino Kaku Gothic ProN",
    "Yu Gothic",
    "Meiryo",
    sans-serif;
  line-height: 1.7;
}

/* =========================
   トップ画像
========================= */
.hero-header {
  background:
    linear-gradient(to bottom, #08080a 0%, #111116 48%, #070709 100%);
}

.hero-stage {
  width: 100%;
  height: clamp(480px, calc(100vh - 128px), 860px);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background:
    radial-gradient(circle at center, #131722 0%, #090d16 58%, #05070c 100%);
  border-bottom: 1px solid rgba(214, 183, 102, 0.20);
  box-shadow:
    inset 0 -18px 28px rgba(0, 0, 0, 0.30);
}

.hero-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center center;
}

/* =========================
   ナビ帯
========================= */
.top-nav-band {
  position: relative;
  background:
    linear-gradient(to bottom, #fff4fb 0%, #ffd9ef 48%, #ffc5e6 100%);
  border-top: 1px solid rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(170, 92, 138, 0.24);
  box-shadow:
    0 10px 24px rgba(0, 0, 0, 0.16),
    inset 0 1px 0 rgba(255, 255, 255, 0.90),
    inset 0 -1px 0 rgba(255, 255, 255, 0.20);
}

.top-nav-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(255,255,255,0.10),
    rgba(255,255,255,0.03),
    rgba(255,255,255,0.10)
  );
  pointer-events: none;
}

.top-nav-inner {
  position: relative;
  z-index: 1;
  max-width: 1440px;
  margin: 0 auto;
  padding: 10px 16px 12px;
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 10px;
}

/* =========================
   ボタン本体
========================= */
.lux-btn {
  --accent: #ff5b7f;
  position: relative;
  min-height: 66px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 14px;
  text-decoration: none;
  color: #17202b;
  background:
    linear-gradient(to bottom, #ffffff 0%, #f3fbff 38%, #dff2ff 100%);
  border: 1px solid rgba(174, 133, 49, 0.78);
  border-radius: 22px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.98),
    inset 0 -2px 0 rgba(120, 176, 214, 0.18),
    0 5px 0 #b68019,
    0 10px 18px rgba(0,0,0,0.10);
  font-weight: 800;
  letter-spacing: 0.02em;
  transition:
    transform 0.16s ease,
    box-shadow 0.16s ease,
    filter 0.16s ease;
}

.lux-btn::before {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  top: 10px;
  height: 7px;
  border-radius: 999px;
  background: linear-gradient(to right, rgba(255,255,255,0.78), var(--accent));
  opacity: 0.96;
}

.lux-btn::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 17px;
  border: 1px solid rgba(255,255,255,0.50);
  pointer-events: none;
}

.lux-btn:hover {
  transform: translateY(-2px);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.98),
    inset 0 -2px 0 rgba(120, 176, 214, 0.18),
    0 7px 0 #b68019,
    0 14px 22px rgba(0,0,0,0.13);
  filter: brightness(1.02);
}

.nav-label {
  position: relative;
  z-index: 1;
  display: inline-block;
  font-size: 16px;
  line-height: 1.2;
  white-space: nowrap;
}

/* =========================
   カラータイマー風 立体丸
========================= */
.nav-orb {
  position: relative;
  z-index: 1;
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  border-radius: 50%;
  box-shadow:
    0 0 0 4px rgba(240, 231, 214, 0.96),
    0 2px 0 rgba(179, 152, 96, 0.9),
    0 5px 10px rgba(0,0,0,0.18),
    inset 0 2px 4px rgba(255,255,255,0.65),
    inset 0 -4px 6px rgba(0,0,0,0.18);
}

.nav-orb::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 5px;
  width: 10px;
  height: 7px;
  border-radius: 50%;
  background: rgba(255,255,255,0.82);
  filter: blur(0.5px);
}

.nav-orb::after {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.26);
}

/* vivid colors */
.orb-red {
  background:
    radial-gradient(circle at 32% 28%, #ffd0dc 0 16%, #ff8aa3 17%, #ff4d73 45%, #db1546 74%, #9d0d31 100%);
}

.orb-blue {
  background:
    radial-gradient(circle at 32% 28%, #d6ecff 0 16%, #7bc4ff 17%, #3b90ff 45%, #1360db 74%, #0a378c 100%);
}

.orb-yellow {
  background:
    radial-gradient(circle at 32% 28%, #fff8c8 0 16%, #ffe77a 17%, #ffd326 45%, #e0ab00 74%, #9f7600 100%);
}

.orb-green {
  background:
    radial-gradient(circle at 32% 28%, #d7ffe4 0 16%, #73ed97 17%, #28c95b 45%, #109a43 74%, #09642b 100%);
}

.orb-pink {
  background:
    radial-gradient(circle at 32% 28%, #ffe1f4 0 16%, #ff9ad4 17%, #ff58b4 45%, #d31d83 74%, #8e0f57 100%);
}

.orb-violet {
  background:
    radial-gradient(circle at 32% 28%, #eadfff 0 16%, #bc95ff 17%, #8c58ff 45%, #5a27d9 74%, #341685 100%);
}

.orb-gold {
  background:
    radial-gradient(circle at 32% 28%, #fff5d7 0 16%, #f6d57c 17%, #e8b73b 45%, #b8830e 74%, #76540a 100%);
}

/* ボタンごとの上ライン色 */
.btn-red { --accent: #ff6a8b; }
.btn-blue { --accent: #5aa5ff; }
.btn-yellow { --accent: #f2c824; }
.btn-green { --accent: #43d06c; }
.btn-pink { --accent: #ff69c0; }
.btn-violet { --accent: #9463ff; }
.btn-gold { --accent: #d7aa3d; }

/* =========================
   メイン本文
========================= */
.main-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 34px 20px 80px;
}

.section-block {
  scroll-margin-top: 120px;
}

.glass-panel {
  background: rgba(22, 24, 32, 0.62);
  border: 1px solid rgba(255, 228, 171, 0.14);
  border-radius: 24px;
  padding: 30px 28px;
  box-shadow:
    0 12px 34px rgba(0,0,0,0.22),
    inset 0 1px 0 rgba(255,255,255,0.05);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.section-kicker {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.20em;
  color: #d6b574;
}

.section-title {
  margin: 0 0 16px;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.2;
  color: #fff4d9;
}

.section-title.small {
  font-size: clamp(24px, 2.6vw, 34px);
}

.lead-text,
.section-text {
  margin: 0;
  font-size: 16px;
  line-height: 1.95;
  color: #f3ecdf;
}

.info-card-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.info-card {
  background:
    linear-gradient(to bottom, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
  border: 1px solid rgba(255, 226, 167, 0.12);
  border-radius: 18px;
  padding: 22px 18px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.06),
    0 8px 18px rgba(0,0,0,0.10);
}

.info-card h2 {
  margin: 0 0 10px;
  font-size: 19px;
  color: #ffe6aa;
}

.info-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: #f3ecdf;
}

.split-sections {
  margin-top: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.link-card-grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.link-card {
  text-decoration: none;
  color: #f6efdf;
  background:
    linear-gradient(to bottom, rgba(255,255,255,0.07), rgba(255,255,255,0.03));
  border: 1px solid rgba(255, 226, 167, 0.14);
  border-radius: 18px;
  padding: 18px 16px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.06),
    0 8px 18px rgba(0,0,0,0.10);
  transition:
    transform 0.16s ease,
    box-shadow 0.16s ease,
    background 0.16s ease;
}

.link-card:hover {
  transform: translateY(-2px);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.06),
    0 12px 22px rgba(0,0,0,0.14);
  background:
    linear-gradient(to bottom, rgba(255,255,255,0.09), rgba(255,255,255,0.04));
}

.link-card-label {
  display: inline-block;
  margin-bottom: 8px;
  padding: 4px 9px;
  border-radius: 999px;
  background: rgba(215, 181, 116, 0.14);
  border: 1px solid rgba(215, 181, 116, 0.18);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.10em;
  color: #e0be7a;
}

.link-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 20px;
  color: #fff3cf;
}

.link-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #f1e9da;
}

.link-card-disabled {
  opacity: 0.86;
}

/* =========================
   フッター
========================= */
.site-footer {
  padding: 20px;
  text-align: center;
  color: #cbbfa8;
  font-size: 13px;
}

/* =========================
   レスポンシブ
========================= */
@media (max-width: 1280px) {
  .top-nav-inner {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .hero-stage {
    height: clamp(340px, 58vh, 560px);
  }

  .top-nav-inner {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .info-card-grid {
    grid-template-columns: 1fr;
  }

  .split-sections {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .top-nav-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    padding: 12px 14px 14px;
  }

  .lux-btn {
    min-height: 64px;
    padding: 10px 12px;
    border-radius: 18px;
    gap: 12px;
  }

  .lux-btn::after {
    border-radius: 13px;
  }

  .nav-label {
    font-size: 14px;
  }

  .nav-orb {
    width: 24px;
    height: 24px;
    flex-basis: 24px;
    box-shadow:
      0 0 0 3px rgba(240, 231, 214, 0.96),
      0 2px 0 rgba(179, 152, 96, 0.9),
      0 4px 8px rgba(0,0,0,0.18),
      inset 0 2px 4px rgba(255,255,255,0.65),
      inset 0 -4px 6px rgba(0,0,0,0.18);
  }

  .main-content {
    padding: 24px 14px 64px;
  }

  .glass-panel {
    padding: 22px 18px;
    border-radius: 18px;
  }

  .section-title {
    font-size: 28px;
  }

  .lead-text,
  .section-text {
    font-size: 15px;
    line-height: 1.85;
  }

  .link-card-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Music Top Hero Upgrade ===== */

.music-top-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at top center, rgba(120, 25, 25, 0.20) 0%, rgba(43, 23, 48, 0.88) 28%, rgba(16, 12, 22, 0.98) 68%, #07070b 100%);
  border-bottom: 1px solid rgba(255, 220, 160, 0.10);
  box-shadow:
    inset 0 -20px 30px rgba(0,0,0,0.28),
    inset 0 1px 0 rgba(255,255,255,0.04);
}

.music-top-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg,
      rgba(255,255,255,0.06) 0%,
      rgba(255,255,255,0.00) 32%,
      rgba(255,180,120,0.05) 56%,
      rgba(255,255,255,0.00) 100%);
  pointer-events: none;
}

.music-top-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 18%, rgba(255,140,80,0.10) 0%, rgba(255,140,80,0.00) 32%);
  pointer-events: none;
}

.music-top-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1320px;
  margin: 0 auto;
  padding: 54px 20px 38px;
}

.music-top-panel {
  max-width: 980px;
  background:
    linear-gradient(to right, rgba(19, 16, 23, 0.94), rgba(34, 27, 41, 0.90));
  border: 1px solid rgba(255, 226, 167, 0.12);
  border-radius: 34px;
  padding: 38px 36px 34px;
  box-shadow:
    0 18px 42px rgba(0,0,0,0.26),
    inset 0 1px 0 rgba(255,255,255,0.05);
}

.music-top-kicker {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.22em;
  color: #f0c6da;
}

.music-top-title {
  margin: 0 0 18px;
  font-size: clamp(40px, 5vw, 72px);
  line-height: 1.02;
  letter-spacing: 0.04em;
  color: #fff8ef;
  text-shadow: 0 2px 16px rgba(0,0,0,0.18);
}

.music-top-lead {
  margin: 0;
  max-width: 880px;
  font-size: 16px;
  line-height: 1.95;
  color: #f3ebe0;
}

@media (max-width: 640px) {
  .music-top-hero-inner {
    padding: 34px 14px 24px;
  }

  .music-top-panel {
    padding: 26px 20px 22px;
    border-radius: 24px;
  }

  .music-top-title {
    font-size: 38px;
  }

  .music-top-lead {
    font-size: 15px;
    line-height: 1.85;
  }
}