html {
          scroll-behavior: smooth;
        }

    body {
      font-family: monospace;
      margin: 0;
      padding: 20px;
    }

    .container {
      max-width: 1000px;
      margin: 0 auto;
    }

    h1 {
      text-align: center;
      font-size: 2.5em;
    }

    #subtitulo {
      color: gray;
      text-align: center;
      margin-bottom: 30px;
    }

    .busca-resumos {
      width: 90%;
      max-width: 700px;
      margin: 0 auto 35px;
      padding: 16px;
      background-color: #A3D5F7;
      border-radius: 10px;
      text-align: center;
    }

    .busca-resumos label {
      display: block;
      font-weight: bold;
      color: #1C2F3F;
      margin-bottom: 10px;
    }

    .busca-campo {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      align-items: stretch;
    }

    #busca-input {
      flex: 1 1 220px;
      max-width: 100%;
      font-family: monospace;
      font-size: 1em;
      padding: 12px 14px;
      border: 4px solid #1C2F3F;
      border-radius: 10px;
      color: #1C2F3F;
      box-sizing: border-box;
    }

    #busca-btn {
      font-family: monospace;
      font-size: 1em;
      font-weight: bold;
      padding: 12px 22px;
      border: 4px solid #1C2F3F;
      border-radius: 10px;
      background-color: #FFB82E;
      color: #1C2F3F;
      cursor: pointer;
    }

    #busca-btn:hover {
      background-color: #F9E270;
    }

    #busca-btn:disabled {
      opacity: 0.7;
      cursor: wait;
    }

    .busca-status {
      margin: 12px 0 0;
      color: #1C2F3F;
      font-size: 0.95em;
      min-height: 1.2em;
    }

    .busca-resultados {
      width: 90%;
      max-width: 100%;
      margin: 25px auto 10px;
      padding: 10px;
      border-radius: 10px;
      background-color: #F9E270;
    }

    .busca-resultados h2 {
      margin-top: 0;
    }

    .busca-resultados small {
      display: block;
      margin-top: 6px;
      color: #333;
      font-style: italic;
      text-align: left;
    }

    i {
      color: rgb(80, 80, 80);
    }

    ol {
      width: 90%;
      max-width: 500px;
      margin: 30px auto;
      padding-left: 20px;
    }

    ol li {
      margin: 10px 0;
    }

    h2 {
      padding: 10px;
      text-align: center;
    }

    table {
      border-collapse: collapse;
      border: 1px solid black;
      margin: 20px auto;
      width: 90%;
      max-width: 100%;
    }

    th, td {
      border: 1px solid black;
      padding: 10px;
      border-radius: 10px;
      text-align: center;
    }

    table a {
      text-decoration: underline;
      color: #1C2F3F;
    }

    table a:hover {
      text-decoration: underline;
      font-style: italic;
      font-weight: bold;
    }

    div.section {
      width: 90%;
      margin: 40px auto;
      padding: 10px;
      border-radius: 10px;
    }

    .one {
      background-color: #F9E270;
    }

    .two {
      background-color: #FFB82E;
    }

    .three {
      background-color: #A3D5F7;
    }

    #go_back {
      display: block;          /* <— essencial pra margin:auto funcionar */
      width: 80%;
      max-width: 400px;
      margin: 40px auto;
      padding: 15px;
      text-align: center;
      background-color: #FFB82E;
      border: 5px #F9E270 solid;
      border-radius: 20px;
      font-weight: bold;
      text-decoration: none;   /* agora funciona, porque está no próprio <a> */
      color: #1C2F3F;
      font-family: monospace;
    }

    #go_back:hover {           /* seu seletor de hover estava errado */
      text-decoration: none;
      border: 5px #FFB82E solid;
      background-color: #F9E270;
    }

    #link_go_back {
      text-decoration: none;
    }

    footer {
      text-align: center;
      font-size: 0.8em;
      margin-top: 20px;
      padding: 20px;
      color: #555;
    }

    footer a {
      color: #1C2F3F;
    }

    footer a:hover {
      font-style: italic;
    }

    footer p {
      line-height: 1.1em;
      margin: 5px auto;
    }

    @media (max-width: 600px) {
      h1 {
        font-size: 2em;
      }

      h2 {
        font-size: 1.2em;
      }

      th, td {
        font-size: 0.9em;
        padding: 8px;
      }

      ol {
        font-size: 1em;
      }

      footer {
        font-size: 0.7em;
      }

      .busca-campo {
        flex-direction: column;
      }

      #busca-input {
        flex: none;
        width: 100%;
        height: auto;
        min-height: 0;
        line-height: normal;
      }

      #busca-btn {
        width: 100%;
      }
    }