body {
  width: 100vw;
  height: 100vh;
  margin: 0;

  font: 18px/1.5 sans-serif;

  background-color: #0093e9;
  background-image: linear-gradient(160deg, #0093e9 0%, #80d0c7 100%);
}

.form {
  box-sizing: border-box;
  width: 500px;
  padding: 30px 80px;
  border-radius: 7px;

  background: #fff;
}

/* BEGIN (write your solution here) */


/* END */

.btn {
  padding: 15px 30px;
  border: none;

  font-weight: bold;

  cursor: pointer;
}

.btn-green {
  color: #fff;

  background: #4caf50;
}

.block-center {
  position: absolute;
  top: 50%;
  left: 50%;

  transform: translate(-50%, -50%);
}

.mb-1 {
  margin-bottom: 1em;
}

.mb-2 {
  margin-bottom: 1.5em;
}

.small {
  font-size: 14px;
}

.sr-only {
  position: absolute;

  width: 1px;
  height: 1px;
  padding: 0;
  border: 0;
  overflow: hidden;

  white-space: nowrap;
}
