:root {
      --bg: #08090b;
      --surface: #101216;
      --surface-2: #171a20;
      --text: #f5f7fa;
      --muted: #9da4ae;
      --line: #292e36;
      --accent: #fff;
      --max: 1120px;
      --radius: 2px;
    }

    * {
      box-sizing: border-box
    }

    html {
      scroll-behavior: smooth
    }

    body {
      margin: 0;
      background: var(--bg);
      color: var(--text);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
        "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
      line-height: 1.8;
      letter-spacing: .02em;
    }

    a {
      color: inherit;
      text-decoration: none
    }

    img {
      max-width: 100%;
      display: block
    }

    code {
      font-family: ui-monospace, SFMono-Regular, Consolas, monospace
    }

    .container {
      width: min(calc(100% - 40px), var(--max));
      margin: auto
    }

    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(8, 9, 11, .86);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--line);
    }

    .nav {
      min-height: 58px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px
    }

    .brand {
      font-weight: 900;
      letter-spacing: -.02em;
      white-space: nowrap
    }

    .brand small {
      display: block;
      color: var(--muted);
      font-size: .55rem;
      letter-spacing: .18em;
      font-weight: 700
    }

    .nav-links {
      display: flex;
      gap: 18px;
      flex-wrap: wrap;
      justify-content: flex-end
    }

    .nav-links a {
      font-size: .68rem;
      letter-spacing: .12em;
      color: var(--muted)
    }

    .nav-links a:hover {
      color: var(--text)
    }

    /* Hero */
    .hero {
      padding: 28px 0 0
    }

    .hero-banner {
      overflow: hidden;
      border: 1px solid var(--line);
      background: var(--surface)
    }

    .hero-banner img {
      width: 100%;
      aspect-ratio: 5/2;
      object-fit: cover;
      display: block
    }

    .hero-title-wrap {
      padding: 22px 0 0
    }

    .hero-title {
      margin: 0;
      font-size: clamp(2rem, 5vw, 4.2rem);
      line-height: .95;
      letter-spacing: -.05em;
      font-weight: 900
    }

    .package-label {
      padding: 9px 12px;
      color: var(--muted);
      font-size: .65rem;
      letter-spacing: .18em;
      text-transform: uppercase
    }

    section {
      padding: 82px 0;
      border-bottom: 1px solid var(--line)
    }

    .section-title {
      margin: 0 0 38px;
      font-size: .72rem;
      font-weight: 800;
      letter-spacing: .25em
    }

    .lead {
      font-size: clamp(1rem, 2vw, 1.18rem)
    }

    .lead strong {
      font-weight: 850
    }

    .about-media {
      margin-top: 36px
    }

    .about-media h3 {
      margin: 0 0 12px;
      font-size: .68rem;
      letter-spacing: .2em;
      color: var(--muted)
    }

    .about-media-frame {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 100%;
      aspect-ratio: 16/9;
      overflow: hidden;
      border: 1px solid var(--line);
      background: var(--surface);
      color: var(--muted);
      text-align: center;
      padding: 24px;
    }

    .about-media-frame iframe,
    .about-media-frame video {
      display: block;
      width: 100%;
      height: 100%;
      border: 0;
    }

    .about-media-placeholder {
      font-size: .9rem
    }

    .about-media-placeholder strong {
      display: block;
      margin-bottom: 6px;
      color: var(--text);
      font-size: 1rem
    }

    .release {
      font-size: clamp(1.5rem, 4vw, 2.4rem);
      font-weight: 800;
      letter-spacing: -.025em;
      margin: 0 0 18px
    }

    .release-date {
      color: var(--muted);
      font-size: .85rem;
      margin-top: 18px
    }

    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 190px;
      padding: 14px 24px;
      border: 1px solid var(--accent);
      background: var(--accent);
      color: #08090b;
      font-weight: 850;
      letter-spacing: .12em;
      transition: .2s;
    }

    .button:hover {
      opacity: .82;
      transform: translateY(-1px)
    }

    .button.secondary {
      background: transparent;
      color: var(--text);
      border-color: var(--line);
      min-width: auto
    }

    .button-row {
      display: flex;
      gap: 10px;
      flex-wrap: wrap
    }

    /* Track overview */
    .track-group {
      margin-top: 54px
    }

    .track-group:first-of-type {
      margin-top: 0
    }

    .track-group-title {
      display: flex;
      align-items: baseline;
      gap: 14px;
      margin: 0 0 15px;
      font-size: .92rem;
      letter-spacing: .16em
    }

    .track-count {
      color: var(--muted);
      font-size: .68rem;
      letter-spacing: .08em;
      font-weight: 400
    }

    .tracks {
      border-top: 1px solid var(--line)
    }

    .track {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 24px;
      padding: 16px 0;
      border-bottom: 1px solid var(--line)
    }

    .track-title {
      font-weight: 650;
      font-size: 1.02rem
    }

    .track-artist {
      color: var(--muted);
      font-size: .82rem;
      text-align: right
    }

    .note {
      margin-top: 18px;
      color: var(--muted);
      font-size: .76rem
    }

    /* Music cards */
    .music-grid {
      display: grid;
      gap: 20px
    }

    .music-card {
      display: grid;
      grid-template-columns: minmax(190px, 28%) 1fr;
      background: var(--surface);
      border: 1px solid var(--line);
    }

    .jacket {
      aspect-ratio: 1/1;
      background: var(--surface-2);
      overflow: hidden
    }

    .jacket img {
      width: 100%;
      height: 100%;
      object-fit: cover
    }

    .music-body {
      padding: 25px 28px
    }

    .music-number {
      color: var(--muted);
      font-size: .65rem;
      letter-spacing: .16em
    }

    .music-title {
      margin: 2px 0 0;
      font-size: clamp(1.25rem, 3vw, 2rem);
      line-height: 1.25;
      letter-spacing: -.025em
    }

    .music-artist {
      margin: 6px 0 20px;
      color: var(--muted);
      font-size: 1.05rem
    }

    .music-genre {
      margin: -10px 0 18px;
      color: var(--muted);
      font-size: .9rem
    }

    .music-genre span {
      color: var(--text)
    }

    .credit-line {
      font-size: .9rem;
      color: var(--muted);
      margin-bottom: 20px
    }

    .music-comment {
      margin-top: 22px;
      border-top: 1px solid var(--line)
    }

    .music-comment summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 14px 2px;
      color: var(--muted);
      font-size: .68rem;
      letter-spacing: .18em;
      font-weight: 800;
      cursor: pointer;
      list-style: none;
      user-select: none
    }

    .music-comment summary::-webkit-details-marker {
      display: none
    }

    .music-comment summary::after {
      content: "＋";
      font-size: 1rem;
      line-height: 1;
      transition: transform .2s
    }

    .music-comment[open] summary::after {
      content: "－"
    }

    .music-comment summary:hover {
      color: var(--text)
    }

    .music-comment p {
      margin: 0;
      padding: 0 2px 18px;
      font-size: .88rem;
      line-height: 1.85;
      color: var(--text);
      white-space: pre-line
    }

    .rights-box {
      margin-top: 24px;
      padding: 16px 18px;
      background: var(--surface-2);
      border-left: 2px solid #59616d;
      color: var(--muted);
      font-size: .76rem
    }

    /* Info / guideline */
    .info-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px
    }

    .info-card {
      padding: 22px;
      background: var(--surface);
      border: 1px solid var(--line)
    }

    .info-card h3 {
      margin: 0 0 8px;
      font-size: .66rem;
      letter-spacing: .18em;
      text-transform: uppercase;
      color: var(--muted)
    }

    .info-card p {
      margin: 0;
      font-weight: 700
    }

    .steps {
      margin: 28px 0 0;
      padding-left: 1.35em
    }

    .guideline-block {
      margin-bottom: 46px
    }

    .guideline-block:last-child {
      margin-bottom: 0
    }

    .guideline-block h3 {
      margin: 0 0 14px;
      font-size: 1.02rem
    }

    .guideline-block p {
      margin: 0 0 14px
    }

    .guideline-block ul {
      margin: 0;
      padding-left: 1.3em
    }

    /* History / Staff */
    .history {
      border-top: 1px solid var(--line)
    }

    .history-item {
      padding: 22px 0;
      border-bottom: 1px solid var(--line)
    }

    .version {
      font-weight: 850
    }

    .date {
      margin-left: 12px;
      color: var(--muted);
      font-size: .82rem
    }

    .history-item ul {
      margin: 7px 0 0;
      padding-left: 1.3em
    }

    .staff-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
      margin-bottom: 48px
    }

    .staff-item {
      padding: 19px;
      border: 1px solid var(--line);
      background: var(--surface)
    }

    .staff-role {
      display: block;
      margin-bottom: 5px;
      color: var(--muted);
      font-size: .65rem;
      letter-spacing: .16em;
      text-transform: uppercase
    }

    .x-link {
      display: inline-flex;
      margin-top: 18px;
      padding: 12px 18px;
      border: 1px solid var(--line);
      background: var(--surface)
    }

    footer {
      padding: 38px 0 52px;
      color: var(--muted);
      font-size: .74rem
    }

    footer strong {
      display: block;
      margin-bottom: 4px;
      color: var(--text);
      font-size: .9rem
    }

    @media(max-width:760px) {
      .container {
        width: min(calc(100% - 28px), var(--max))
      }

      .nav {
        align-items: flex-start;
        padding: 10px 0
      }

      .nav-links {
        gap: 10px
      }

      section {
        padding: 62px 0
      }

      .music-card {
        grid-template-columns: 1fr
      }

      .jacket {
        aspect-ratio: 1/1
      }

      .jacket img {
        object-fit: contain
      }

      .music-body {
        padding: 21px
      }

      .music-title {
        font-size: 1.55rem
      }

      .music-artist {
        font-size: 1rem
      }

      .music-genre {
        font-size: .88rem
      }

      .info-grid,
      .staff-grid {
        grid-template-columns: 1fr
      }

      .track {
        grid-template-columns: 1fr;
        gap: 2px
      }

      .track-artist {
        text-align: left
      }

      .date {
        display: block;
        margin: 2px 0 0
      }
    }