body {
    background: #f8fafc;
    color: #222;
  }
  header h1 {
    color: #0074d9;
    font-size: 2.2em;
    margin-bottom: 0.2em;
  }
  .subtitle {
    font-size: 1.1em;
    color: #444;
  }
  .privacy-note {
    font-size: 0.98em;
    color: #0074d9;
  }
  .card {
    border-radius: 12px;
    box-shadow: 0 2px 12px #0001;
  }
  .ad-slot {
    margin: 1.5em auto;
    background: #f1f5f9;
    border: 1px dashed #bbb;
    border-radius: 8px;
    text-align: center;
    padding: 1.2em;
    color: #888;
    max-width: 600px;
  }
  .info-section {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 12px #0001;
  }
  .toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #333;
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
    font-size: 1.1em;
  }
  .toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
  }
  #file-list {
    font-size: 0.98em;
  }