body {
      margin: 0;
      padding: 0;
      height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      background: radial-gradient(circle at top, #445, #111);
      font-family: "Segoe UI", system-ui, sans-serif;
      color: #eee;
    }

    .player {
      width: 320px;
      padding: 20px 24px 26px;
      border-radius: 16px;
      background: rgba(10, 10, 20, 0.9);
      box-shadow:
        0 20px 40px rgba(0, 0, 0, 0.8),
        0 0 30px rgba(150, 200, 255, 0.15);
      backdrop-filter: blur(12px);
    }

    .title {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .subtitle {
      font-size: 12px;
      color: #bbb;
      margin-bottom: 18px;
    }

    .controls {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .play-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      border: none;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #66d0ff, #8ef7c7);
      box-shadow: 0 0 18px rgba(120, 220, 255, 0.7);
      transition: transform 0.12s ease, box-shadow 0.12s ease;
    }

    .play-btn:hover {
      transform: scale(1.06);
      box-shadow: 0 0 22px rgba(120, 220, 255, 0.85);
    }

    .play-icon {
      width: 0;
      height: 0;
      border-style: solid;
      border-width: 9px 0 9px 15px;
      border-color: transparent transparent transparent #102030;
      margin-left: 3px;
    }

    .pause-icon {
      display: flex;
      gap: 4px;
    }

    .pause-icon span {
      width: 4px;
      height: 16px;
      border-radius: 3px;
      background: #102030;
    }

    .time-display {
      flex: 1;
      font-size: 11px;
      color: #aaa;
      display: flex;
      justify-content: space-between;
    }

    .slider {
      -webkit-appearance: none;
      appearance: none;
      width: 100%;
      height: 4px;
      border-radius: 999px;
      background: linear-gradient(90deg, #66d0ff, #8ef7c7);
      outline: none;
      cursor: pointer;
    }

    .slider::-webkit-slider-thumb {
      -webkit-appearance: none;
      appearance: none;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: #fff;
      box-shadow: 0 0 12px rgba(120, 220, 255, 0.9);
      margin-top: -5px;
    }

    .slider::-moz-range-thumb {
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: #fff;
      box-shadow: 0 0 12px rgba(120, 220, 255, 0.9);
      border: none;
    }

    .progress-wrap {
      margin-bottom: 14px;
    }

    .bottom-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }

    .volume-wrap {
      display: flex;
      align-items: center;
      gap: 8px;
      flex: 1;
    }

    .volume-icon {
      font-size: 14px;
      color: #aaa;
    }

    .volume-slider {
      flex: 1;
      background: linear-gradient(90deg, #66d0ff, #8ef7c7);
    }

    .track-select {
      padding: 4px 8px;
      font-size: 11px;
      border-radius: 999px;
      border: 1px solid #555;
      background: rgba(5, 5, 15, 0.9);
      color: #eee;
      outline: none;
      cursor: pointer;
    }

    .track-select option {
      background: #111827;
    }

    .breath {
      font-size: 10px;
      color: #777;
      margin-top: 4px;
      text-align: right;
      letter-spacing: 0.1em;
    }
#waveCanvas {
  width: 100%;
  height: 120px;
  display: block;
  margin-top: 20px;
  filter: drop-shadow(0 0 6px rgba(120, 220, 255, 0.5));
}

#particleCanvas {
  width: 100%;
  height: 160px;
  display: block;
  margin-top: 10px;
  filter: blur(1px) drop-shadow(0 0 6px rgba(120, 220, 255, 0.7));
}

@media (max-width: 480px) {
  body {
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    padding: 1rem;
    height: auto;
  }

  .player {
    width: 100%;
    max-width: 360px;
    margin: 2rem auto;
    padding: 16px 20px 22px;
    border-radius: 12px;
  }

  .title {
    font-size: 16px;
    text-align: center;
  }

  .subtitle {
    font-size: 11px;
    text-align: center;
    margin-bottom: 16px;
  }

  .controls {
    flex-direction: row;
    justify-content: center;
    gap: 10px;
  }

  .play-btn {
    width: 40px;
    height: 40px;
  }

  .play-icon {
    border-width: 8px 0 8px 13px;
  }

  .pause-icon span {
    width: 3px;
    height: 14px;
  }

  .time-display {
    font-size: 10px;
  }

  .bottom-row {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .volume-wrap {
    flex-direction: row;
    justify-content: space-between;
  }

  .volume-icon {
    font-size: 13px;
  }

  .track-select {
    width: 100%;
    font-size: 12px;
  }

  .breath {
    font-size: 9px;
    text-align: center;
    margin-top: 8px;
  }

  #waveCanvas,
  #particleCanvas {
    height: 100px;
  }
}


.detail-thumb {
  object-fit: cover;
  background-color: #222;
}

.related-card img {
  width: 200px;
  height: 200px;
  object-fit: cover;
  background-color: #222;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: flex-start;
  margin-top: 20px;
}

.detail-wrapper {
  flex-wrap: wrap;
}

.related-section {
  width: 100%;
  display: block;
  clear: both;
  flex-basis: 100%;
}