:root {
      --gap: 14px;
      --border: #e7e7e7;
      --bg: #ffffff;
      --page: #fafafa;
      --text: #111;
      --muted: #666;
      --accent: #2563eb;
      --danger: #dc2626;
      --shadow: 0 10px 30px rgba(0,0,0,0.06);
      --radius: 12px;
      --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
      --sans: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    }

    html, body {
      margin: 0;
      padding: 0;
      font-family: var(--sans);
      background: var(--page);
      color: var(--text);
      height: 100%;
    }

    .app {
      display: grid;
      grid-template-columns: 420px 1fr;
      gap: var(--gap);
      padding: var(--gap);
      box-sizing: border-box;
      height: 100vh;
    }

    .panel {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      overflow: auto;
    }

    .left { padding: 14px 14px 16px 14px; }
    .right {
      padding: 0;
      display: flex;
      flex-direction: column;
      min-width: 0;
    }

    h1 {
      font-size: 16px;
      margin: 0 0 10px 0;
    }

    .row { margin: 12px 0; }

    label {
      display: block;
      font-weight: 800;
      font-size: 12px;
      margin-bottom: 6px;
    }

    input[type="text"], input[type="number"], select, textarea {
      width: 100%;
      box-sizing: border-box;
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 10px 11px;
      font-size: 14px;
      background: #fff;
      outline: none;
    }

    textarea {
      min-height: 70px;
      resize: vertical;
      font-family: var(--mono);
      font-size: 12px;
      line-height: 1.35;
    }

    .muted {
      color: var(--muted);
      font-size: 12px;
      margin-top: 6px;
      line-height: 1.35;
    }

    .grid2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
    }

    .checks {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 6px 10px;
      padding: 10px;
      border: 1px solid var(--border);
      border-radius: 10px;
      background: #fbfbfb;
    }

    .checks label {
      font-weight: 700;
      margin: 0;
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      font-size: 12px;
    }

    .btns {
      display: flex;
      gap: 10px;
      align-items: center;
      flex-wrap: wrap;
      margin-top: 12px;
    }

    button {
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 10px 12px;
      cursor: pointer;
      font-weight: 800;
      background: #111;
      color: #fff;
    }

    button.secondary {
      background: #fff;
      color: #111;
    }

    button:disabled {
      opacity: 0.55;
      cursor: not-allowed;
    }

    .pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 10px;
      border: 1px solid var(--border);
      border-radius: 999px;
      background: #fff;
      font-size: 12px;
      color: var(--muted);
    }
    .pill strong { color: var(--text); }

    .iframe-bar {
      padding: 12px 14px;
      border-bottom: 1px solid var(--border);
      display: flex;
      gap: 10px;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }

    .iframe-bar .url {
      flex: 1 1 520px;
      display: flex;
      gap: 8px;
      align-items: center;
      min-width: 260px;
    }

    .iframe-bar input {
      font-size: 12px;
      font-family: var(--mono);
    }

    .iframe-wrap { flex: 1; min-height: 0; }

    iframe {
      width: 100%;
      height: 100%;
      border: 0;
      background: transparent;
    }

    pre {
      margin: 0;
      padding: 10px;
      border-radius: 10px;
      background: #0b1020;
      color: #dbeafe;
      font-size: 12px;
      overflow: auto;
      font-family: var(--mono);
      border: 1px solid rgba(255,255,255,0.06);
      white-space: pre-wrap;
    }

    .smallrow {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }
    .smallrow > div { flex: 1 1 160px; }

    /* --- Phrase chips --- */
    .chips {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 10px;
      padding: 10px;
      border: 1px solid var(--border);
      border-radius: 10px;
      background: #fbfbfb;
      min-height: 44px;
      align-items: center;
    }

    .chip {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 10px;
      border-radius: 999px;
      background: rgba(37, 99, 235, 0.10);
      border: 1px solid rgba(37, 99, 235, 0.25);
      color: #0b1020;
      font-size: 12px;
      font-weight: 800;
      user-select: none;
    }

    .chip button {
      border: 0;
      background: transparent;
      color: rgba(0,0,0,0.55);
      cursor: pointer;
      font-weight: 900;
      padding: 0;
      line-height: 1;
      font-size: 14px;
    }

    .chip button:hover { color: rgba(0,0,0,0.85); }

    @media (max-width: 980px) {
      .app { grid-template-columns: 1fr; height: auto; }
      .right { min-height: 60vh; }
    }