.hidden {
      display: none;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background: linear-gradient(135deg, #0f0f1b, #18182c);
      color: #ffffff;
      min-height: 100vh;
      padding: 20px;
      overflow-x: hidden;
    }

    header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px;
      background: rgba(15, 15, 27, 0.8);
      border-radius: 12px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
      margin-bottom: 30px;
      border: 1px solid rgba(0, 229, 255, 0.1);
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.8rem;
      font-weight: 700;
      color: #00e5ff;
    }

    .logo i {
      font-size: 2.2rem;
    }

    #main-nav ul {
      display: flex;
      list-style: none;
      gap: 25px;
    }

    #main-nav a {
      color: #b0b0d0;
      text-decoration: none;
      font-size: 1.1rem;
      font-weight: 500;
      padding: 8px 15px;
      border-radius: 30px;
      transition: all 0.3s ease;
    }

    #main-nav a:hover {
      color: #ffffff;
      background: rgba(0, 229, 255, 0.1);
    }

    .panel {
      background: #18182c;
      border-radius: 12px;
      padding: 25px;
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
      border: 1px solid rgba(125, 0, 255, 0.1);
      display: flex;
      flex-direction: column;
    }

    .panel-title {
      font-size: 1.4rem;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 10px;
      padding-bottom: 15px;
      border-bottom: 1px solid rgba(125, 0, 255, 0.2);
    }

    .panel-title i {
      color: #7d00ff;
    }

    /* Disk Library Styles */

    .disk-card {
      background: #212140;
      border-radius: 12px;
      padding: 15px;
      display: flex;
      flex-direction: column;
      align-items: center;
      transition: all 0.3s ease;
      cursor: grab;
      border: 1px solid transparent;
      position: relative;
      width: 120px;
      min-width: 120px;
      min-height: 140px;
      box-sizing: border-box;
    }

    .disk-card:hover {
      transform: translateY(-5px);
      border-color: #00e5ff;
      box-shadow: 0 0 10px #00e5ff, 0 0 20px rgba(0, 229, 255, 0.5);
    }

    .disk-card img {
      width: 80px;
      height: 80px;
      object-fit: contain;
      margin-bottom: 10px;
      filter: drop-shadow(0 0 5px rgba(0, 229, 255, 0.5));
    }

    .disk-name {
      font-size: 1.1rem;
      font-weight: 500;
      color: #ffffff;
      text-align: center;
      position: absolute;
      bottom: 10px;
      left: 50%;
      transform: translateX(-50%);
      width: 100px;
    }

    /* Mixer Area Styles */

    .drop-zone-container {
      position: relative;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .drop-zone-label {
      margin-bottom: 10px;
      font-size: 1rem;
      color: #b0b0d0;
    }

    .drop-zone {
      width: 100%;
      height: 150px;
      background: #212140;
      border-radius: 12px;
      border: 2px dashed rgba(125, 0, 255, 0.3);
      display: flex;
      justify-content: center;
      align-items: center;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .drop-zone.active {
      border-color: #00e5ff;
      box-shadow: 0 0 10px #00e5ff, 0 0 20px rgba(0, 229, 255, 0.5);
    }

    .drop-zone i {
      font-size: 2.5rem;
      color: rgba(125, 0, 255, 0.3);
    }

    .drop-zone.active i {
      color: #00e5ff;
    }

    .drop-zone.has-disk {
      border-style: solid;
      background: rgba(125, 0, 255, 0.1);
    }

    .drop-zone.has-disk i {
      display: none;
    }

    .drop-zone .disk-card {
      width: 120px;
      min-width: 120px;
      min-height: 140px;
      padding: 15px;
      box-sizing: border-box;
      position: relative;
    }

    .drop-zone .disk-card .disk-name {
      position: absolute;
      bottom: 10px;
      left: 50%;
      transform: translateX(-50%);
      width: 100px;
      text-align: center;
      font-size: 1.1rem;
      font-weight: 500;
      color: #ffffff;
    }

    .drop-zone .disks-image {
      max-width: 90%;
      max-height: 90%;
      object-fit: contain;
      filter: drop-shadow(0 0 8px rgba(0, 229, 255, 0.7));
    }

    /* Controls Panel Styles */

    .control-group {
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 15px;
      background: #212140;
      border-radius: 12px;
    }

    .control-title {
      font-size: 1.1rem;
      margin-bottom: 15px;
      color: #00e5ff;
    }

    .transport-controls {
      display: flex;
      gap: 15px;
      justify-content: center;
    }

    .control-btn {
      width: 60px;
      height: 60px;
      border-radius: 50%;
      background: #212140;
      border: 2px solid #7d00ff;
      color: #ffffff;
      font-size: 1.5rem;
      display: flex;
      justify-content: center;
      align-items: center;
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .control-btn:hover {
      background: #7d00ff;
      transform: scale(1.05);
      box-shadow: 0 0 15px rgba(125, 0, 255, 0.7);
    }

    .control-btn.active {
      background: #7d00ff;
      box-shadow: 0 0 15px rgba(125, 0, 255, 0.7);
    }

    .volume-control {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
      width: 100%;
    }

    .volume-label {
      display: flex;
      justify-content: space-between;
      width: 100%;
      font-size: 0.9rem;
      color: #b0b0d0;
    }

    #volumeControl {
      width: 100%;
      height: 8px;
      background: linear-gradient(to right, #00e5ff, #ff00e5);
      border-radius: 4px;
      outline: none;
    }

    /* Lightbox Styles */
    .lightbox {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(15, 15, 27, 0.95);
      display: flex;
      justify-content: center;
      align-items: center;
      z-index: 1000;
      opacity: 0;
      visibility: hidden;
      transition: all 0.4s ease;
    }

    .lightbox.active {
      opacity: 1;
      visibility: visible;
    }

    .lightbox_content {
      background: #18182c;
      width: 90%;
      max-width: 800px;
      max-height: 90vh;
      border-radius: 12px;
      padding: 40px;
      position: relative;
      overflow-y: auto;
      box-shadow: 0 0 40px rgba(0, 229, 255, 0.2);
      border: 1px solid #7d00ff;
    }

    .lightbox_close {
      position: absolute;
      top: 20px;
      right: 20px;
      font-size: 1.8rem;
      color: #b0b0d0;
      text-decoration: none;
      transition: all 0.3s ease;
      width: 40px;
      height: 40px;
      display: flex;
      justify-content: center;
      align-items: center;
      border-radius: 50%;
    }

    .lightbox_close:hover {
      color: #ff00e5;
      background: rgba(255, 0, 229, 0.1);
      transform: rotate(90deg);
    }

    .lb_heading {
      font-size: 2rem;
      margin-bottom: 25px;
      color: #00e5ff;
      text-align: center;
    }

    .lb_text {
      line-height: 1.8;
      color: #b0b0d0;
      font-size: 1.1rem;
    }

    .lb_text br {
      margin-bottom: 15px;
      display: block;
      content: "";
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .transport-controls {
        flex-wrap: wrap;
      }
      
      header {
        flex-direction: column;
        gap: 15px;
      }
      
      #main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
      }
    }