react-hook-form/app/src/style.css

body {
  padding: 20px;
  background: #081229;
  color: white;
}

select,
input {
  display: block;
  box-sizing: border-box;
  width: 100%;
  border-radius: 4px;
  border: 1px solid white;
  padding: 10px 15px;
  margin-bottom: 15px;
  font-size: 14px;
  max-width: 600px;
}

label {
  display: block;
  margin-bottom: 8px;
}

button,
input[type='submit'],
.button {
  position: relative;
  background: #ec5990;
  color: white;
  text-transform: uppercase;
  border: none;
  margin-top: 20px;
  padding: 20px;
  font-size: 16px;
  letter-spacing: 10px;
  display: block;
  appearance: none;
  border-radius: 4px;
  width: 100%;
  font-weight: lighter;
  transition: 0.3s all;
  max-width: 600px;
}

button[type='button'] {
  background: #516391;
  color: white;
  text-transform: none;
  padding: 10px;
  letter-spacing: 2px;
}

input[type='submit']:hover,
button[type='button']:hover {
  background: #bf1650;
  color: white;
}

input[type='submit']:active {
  transition: 0.3s all;
  top: 2px;
}