html,
body {
  height: 100%;
  background-color: #000000;
}

body {
  -ms-flex-align: center;
  align-items: center;
  padding-top: 80px;
  padding-bottom: 80px;
}

.form-address {
  width: 100%;
  max-width: 700px;
  padding: 15px;
  margin: auto;
}
.form-address .form-control {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  height: auto;
  padding: 10px;
}
.form-address .form-control:focus {
  z-index: 2;
}
.form-address input[type="text"] {
  margin-bottom: 15px;
  max-width: 640px;
  text-align: center;
  font-size: 15px;
}
.form-address button {
  margin-bottom: 25px;
  max-width: 460px;
}
.alert {
  position: absolute;
  top: 0;
  width: 100%;
  margin: 0 auto;
}