style.css

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: rgb(70, 111, 187);
  font-family: Verdana, Geneva, Tahoma, sans-serif;
}

.main {
  width: 80vw;
  margin: auto;
  display: flex;
  justify-content: center;
}

.titulo {
  padding: 15px;
  color: white;
  width: 30vw;
  margin: auto;

}

.box {
  padding: 10px;
  margin: 0 10px 0 10px;
  box-shadow: 2px 2px 2px 1px rgb(53, 84, 141);
  background-color: rgb(255, 255, 255);
  border-radius: 0.5em;
  width: 30vw;
  height: auto;
}

.btn {
  border: 0;
  color: white;
  font-weight: bold;
  background-color: blue;
  padding: 10px;
  margin-top: 10px;
  border-radius: 0.5em;
}

.text-input {
  border-radius: 0.5em;
  border: 2px solid rgba(0, 0, 0, 0.603);
  display: block;
  padding: 0.5em;
  width: 100%;
  height: 50px;
}