* { font-family: 'Inter', sans-serif; }
  body { 
    background-color: #0a0f1c; 
    color: #e5e7eb; 
    min-height: 100vh;
    display: flex;
    flex-direction: column;
  }

  .glass {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  }

  .progress-ring__circle {
    transition: stroke-dashoffset 1s linear;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
  }

  .play-btn {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .play-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.4);
  }
  .play-btn:active {
    transform: scale(0.95);
  }

  input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
  }
  input[type=range]:focus { outline: none; }
  input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: #10b981;
    cursor: pointer;
    margin-top: -6px;
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.5);
    transition: transform 0.1s ease;
  }
  input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.2); }
  input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 2px;
  }
  input[type=range]::-moz-range-thumb {
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: #10b981;
    cursor: pointer;
    border: none;
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.5);
  }
  input[type=range]::-moz-range-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 2px;
  }

  .marquee {
    overflow: hidden;
    white-space: nowrap;
    position: relative;
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  }
  .marquee span {
    display: inline-block;
    padding-left: 100%;
    animation: marquee 15s linear infinite;
  }
  .marquee.paused span {
    animation-play-state: paused;
  }
  @keyframes marquee {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-100%, 0); }
  }