/* Reset e base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: #f7f9fc;
  color: #333;
  text-align: center;
  padding: 50px 20px;
}

h1 {
  font-size: 2.2em;
  margin-bottom: 30px;
  color: #222;
}

/* Container dos inputs e botões */
.input-container {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

/* Campos de texto */
input[type="text"] {
  padding: 12px 16px;
  font-size: 1em;
  width: 300px;
  max-width: 90%;
  border: 1px solid #ccc;
  border-radius: 8px;
  outline: none;
  transition: border 0.2s;
}

input[type="text"]:focus {
  border-color: #4a90e2;
}

/* Botões */
button {
  padding: 12px 20px;
  font-size: 1em;
  background-color: #4a90e2;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
}

button:hover {
  background-color: #357ab7;
}

/* Histórico de mensagens */
ul#listaHistorico {
  list-style: none;
  padding: 0;
  margin-top: 30px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

ul#listaHistorico li {
  background: #ffffff;
  padding: 12px 16px;
  margin-bottom: 10px;
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
  text-align: left;
  word-wrap: break-word;
  font-size: 1em;
}

#btnToggleHistorico {
  margin-top: 20px;
  font-size: 1em;
  padding: 12px 20px;
}

/* Responsividade */
@media (max-width: 480px) {
  body {
    padding: 30px 15px;
  }

  h1 {
    font-size: 1.5em;
    margin-bottom: 20px;
  }

  .input-container {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  input[type="text"], button {
    width: 100%;
    font-size: 1.1em;
  }

  ul#listaHistorico li {
    font-size: 1.05em;
    padding: 14px 18px;
  }

  #btnToggleHistorico {
    width: 100%;
    font-size: 1.05em;
    padding: 14px 18px;
  }
}