style.css

@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300&display=swap');

body {
  background-color: #001848;
}

.container {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;

  align-items:center;
  justify-content:center;

  height: 90vh;
  width: 100%;
}

.content {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;

  padding:24px;
  align-items:center;
}

.text-input {
  font-size: 32px;
  border: none;
  border-bottom: 3px solid #604878;
  background: #001848;
  color: #fff;
  margin: 5px;
  transition: 0.3s;
}

.text-input:focus {
  outline: none;
  border-bottom: 3px solid #906090;
}

.falar-btn {
  color: aliceblue;
  background: #604878;
  border: none;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
}

.falar-btn:hover {
  background: #906090;
}

.footer a {
  font-family: 'Roboto', sans-serif;
  text-align: center;
  color: #906090;
  text-decoration: none;
}