style.css

:root {
  --colorFondo: #ffc857;
  --colorContenido: #bcd8c1;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--colorFondo);
  width: 100vw;
  height: 100vh;
}

.contenedor {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-direction: column;
  background-color: var(--colorContenido);
  width: 300px;
  height: 450px;
  border-radius: 15px;
}
.contenedor > form {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-direction: column;
  width: 100%;
  height: 30%;
}
.inputText {
  width: 80%;
  height: 40px;
  font-size: 20px;
}
.boton {
  background: linear-gradient(to bottom, #599bb3 5%, #408c99 100%);
  background-color: #599bb3;
  border-radius: 15px;
  display: inline-block;
  cursor: pointer;
  color: #ffffff;
  font-family: Times New Roman;
  font-size: 28px;
  font-weight: bold;
  padding: 6px 54px;
  text-decoration: none;
  border: 0;
}
.boton:hover {
  background: linear-gradient(to bottom, #408c99 5%, #599bb3 100%);
  background-color: #408c99;
}
.boton:active {
  position: relative;
  top: 1px;
}