:root {
    --accent: #1a73e8;
    --border: #dadce0;
    --text: #202124;
    --muted: #5f6368;
  }
  * { box-sizing: border-box; }
  body {
    font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
    color: var(--text);
    max-width: 560px;
    margin: 40px auto;
    padding: 0 20px;
  }
  h1 {
    font-size: 18px;
    margin-bottom: 16px;
  }
  .search-box {
    display: flex;
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 6px 8px 6px 16px;
    align-items: center;
    transition: box-shadow .2s;
  }
  .search-box:focus-within {
    box-shadow: 0 1px 6px rgba(32,33,36,.28);
    border-color: transparent;
  }
  .search-box input[type="text"] {
    flex: 1;
    border: none;
    outline: none;
    font-size: 15px;
    padding: 8px 4px;
  }
  .search-box button {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 18px;
    padding: 8px 18px;
    font-size: 14px;
    cursor: pointer;
  }
  .search-box button:hover { background: #1765cc; }

  .options {
    margin-top: 16px;
    font-size: 14px;
  }
  .options-title {
    color: var(--muted);
    margin-bottom: 8px;
  }
  .option-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 0;
  }
  .option-item input {
    width: 16px;
    height: 16px;
  }
  .default-site {
    margin-top: 12px;
    font-size: 12px;
    color: var(--muted);
  }
  .query-preview {
    margin-top: 16px;
    font-size: 12px;
    color: var(--muted);
    word-break: break-all;
    background: #f8f9fa;
    border-radius: 8px;
    padding: 10px 12px;
    display: none;
  }