.yt-tool {
      font-family: Inter, system-ui, Arial, sans-serif;
      background: #ffffff;
      color: #000000;
      display: flex;
      align-items: flex-start;
      justify-content: center;
      padding: 28px;
    }
    .yt-tool * { box-sizing: border-box; }
    .yt-tool .container {
      width: 100%;
      max-width: 1200px;
      box-shadow: 0 8px 25px rgba(0,0,0,0.15);
      border-radius: 12px;
      background: #fff;
      padding: 20px;
    }
    .yt-tool header { text-align: center; margin-bottom: 20px; }
    .yt-tool h2 { font-size: 24px; margin: 0; color: #000; }
    .yt-tool p.lead { margin: 4px 0 0; color: #555; font-size: 14px; }

    .yt-tool .card {
      background: #fff;
      border-radius: 12px;
      padding: 18px;
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    }

    .yt-tool .grid {
      display: grid;
      grid-template-columns: 1fr 360px;
      gap: 16px;
    }

    .yt-tool label { display: block; font-size: 13px; color: #333; margin-bottom: 6px; }

    .yt-tool input[type=text],
    .yt-tool input[type=number],
    .yt-tool select {
      width: 100%;
      padding: 12px 14px;
      border-radius: 8px;
      border: 1px solid #ccc;
      background: #f9f9f9;
      color: #000;
      font-size: 15px;
    }

    .yt-tool input.big-box {
      height: 46px;
      font-size: 16px;
      border: 1px solid #aaa;
      background: #fff;
    }

    .yt-tool .row { display: flex; gap: 10px; }
    .yt-tool .small { width: 100px; }

    .yt-tool .controls { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

    .yt-tool button {
      padding: 10px 12px;
      border-radius: 10px;
      border: 0;
      cursor: pointer;
      font-weight: 600;
      box-shadow: 0 4px 10px rgba(0,0,0,0.15);
      transition: 0.2s ease;
    }

    .yt-tool button:hover { opacity: 0.85; }
    .yt-tool button.yellow { background: #ffca28; color: #000; }
    .yt-tool button.red { background: #e53935; color: #fff; }

    /* --- OUTPUT SECTION FIX --- */
    .yt-tool .output { 
      margin-top: 12px; 
      display: flex; 
      flex-direction: column; 
      gap: 10px; 
    }

    .yt-tool .output .box {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .yt-tool .output label {
      width: 100px;
      font-weight: 600;
      margin: 0;
    }

    .yt-tool .output input {
      flex: 1;
      background: #f9f9f9;
      border: 1px solid #ddd;
      color: #000;
      border-radius: 8px;
      padding: 10px;
    }

    .yt-tool .meta { font-size: 13px; color: #555; margin-top: 8px; }

    .yt-tool .preview {
      background: #fff;
      padding: 12px;
      border-radius: 10px;
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    }

    .yt-tool iframe { width: 100%; height: 220px; border-radius: 8px; border: 0; }
    .yt-tool .hint { font-size: 12px; color: #666; }

    /* --- HISTORY SECTION --- */
    .yt-tool .history { margin-top: 25px; display: flex; flex-direction: column; gap: 12px; }
    .yt-tool .history label { font-weight: 600; margin-bottom: 4px; }
    .yt-tool .history .history-item {
      background: #fff;
      border-radius: 12px;
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .yt-tool .history .meta { font-size: 13px; color: #555; }
    .yt-tool .history .box {
      display: flex;
      gap: 8px;
      align-items: center;
    }
    .yt-tool .history label {
      width: 100px;
      margin: 0;
    }
    .yt-tool .history input {
      flex: 1;
      background: #f9f9f9;
      border: 1px solid #ddd;
      border-radius: 8px;
      padding: 8px;
      color: #000;
    }

    @media(max-width:900px){
      .yt-tool .grid { grid-template-columns: 1fr; }
      .yt-tool .preview iframe { height: 200px; }
    }