.tr {
    --tr-accent: #0d9488;
    --tr-bg-canvas: #f1f5f9;
    --tr-bg-controls: #fff;
    --tr-text: #1e293b;
    --tr-label: #64748b;
    --tr-border: #e2e8f0;
    --tr-track: #e2e8f0;
    --tr-btn-hover: #f8fafc;
    --tr-play-inner: rgba(255, 255, 255, 0.9);
    --tr-overlay-start: rgba(248, 250, 252, 0.1);
    --tr-thumb-bg: #fff;

    position: relative;
    width: 100%;
    max-width: 56rem;
    margin: 0 auto;
    background: var(--tr-bg-controls);
    border-radius: 1.5rem;
    overflow: hidden;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--tr-border);
  }

  .tr__visualizer {
    position: relative;
    height: 16rem;
    background: var(--tr-bg-canvas);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
  }

  .tr__canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0.6;
  }

  .theme-dark .tr {
    --tr-accent: #2dd4bf;
    --tr-bg-canvas: #020617;
    --tr-bg-controls: #0f172a;
    --tr-text: #cbd5e1;
    --tr-label: #94a3b8;
    --tr-border: #334155;
    --tr-track: #1e293b;
    --tr-btn-hover: #1e293b;
    --tr-play-inner: rgba(30, 41, 59, 0.8);
    --tr-overlay-start: rgba(15, 23, 42, 0.1);
    --tr-thumb-bg: #0f172a;
  }

  .tr__canvas-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, var(--tr-overlay-start), transparent, var(--tr-bg-controls));
    pointer-events: none;
  }

  .tr__play-btn {
    position: relative;
    z-index: 10;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s;
  }

  .tr__play-btn:hover {
    transform: scale(1.05);
  }

  .tr__play-glow {
    position: absolute;
    inset: 0;
    background: rgba(20, 184, 166, 0.2);
    filter: blur(2rem);
    border-radius: 50%;
    opacity: 0.2;
    transition: opacity 0.3s;
    pointer-events: none;
  }

  .tr__play-btn:hover .tr__play-glow {
    opacity: 0.4;
  }

  .tr__play-inner {
    width: 5rem;
    height: 5rem;
    background: var(--tr-play-inner);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border: 1px solid var(--tr-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
    transition: border-color 0.3s;
  }

  .tr__play-btn:hover .tr__play-inner {
    border-color: rgba(45, 212, 191, 0.5);
  }

  .tr__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
  }

  .tr__icon svg {
    width: 2rem;
    height: 2rem;
  }

  .tr__icon--play {
    color: var(--tr-accent);
  }

  .tr__icon--stop {
    color: #f87171;
  }

  .tr__icon--hidden {
    display: none;
  }

  .tr__controls {
    padding: 2rem;
    color: var(--tr-text);
  }

  .tr__noise-btns {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
  }

  .tr__noise-btn {
    padding: 0.5rem 1.5rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--tr-border);
    background: transparent;
    color: var(--tr-label);
    cursor: pointer;
    transition: all 0.3s;
  }

  .tr__noise-btn:hover {
    background: var(--tr-btn-hover);
  }

  .tr__noise-btn[data-active="true"] {
    background: rgba(20, 184, 166, 0.2);
    border-color: rgba(45, 212, 191, 0.5);
    color: var(--tr-accent);
  }

  .tr__sliders {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .tr__slider-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .tr__slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .tr__label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--tr-label);
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  .tr__value {
    color: var(--tr-accent);
    font-size: 1.125rem;
  }

  .tr__slider {
    width: 100%;
    appearance: none;
    background: var(--tr-track);
    height: 0.5rem;
    border-radius: 0.25rem;
    cursor: pointer;
    outline: none;
    border: none;
  }

  .tr__slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    background: var(--tr-thumb-bg);
    border: 2px solid var(--tr-accent);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(45, 212, 191, 0.3);
    transition: transform 0.1s;
  }

  .tr__slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(45, 212, 191, 0.5);
  }

  .tr__slider::-moz-range-thumb {
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    background: var(--tr-thumb-bg);
    border: 2px solid var(--tr-accent);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(45, 212, 191, 0.3);
  }

  .tr__hint {
    font-size: 0.75rem;
    color: var(--tr-label);
    margin: 0;
  }

  @media (max-width: 640px) {
    .tr__sliders {
      grid-template-columns: 1fr;
      gap: 2rem;
    }

    .tr__noise-btns {
      gap: 0.5rem;
    }

    .tr__controls {
      padding: 1.5rem;
    }
  }