body {
  min-width: 0;
}

.form {
  margin-bottom: 20px;
}

.panel-test {
  border-radius: 4px;
  padding: 10px;
  text-align: center;
}

.panel-test .one_third {
  box-sizing: border-box;
}

.panel-test .one_third:last-of-type {
   border: none;
}

.feedback {
  padding: 10px;
  border-radius: 4px;
  margin: 0;
  color: #777;
  background-color: #f5f5f5;
  transition: background-color linear 300ms;
}

.good {
  color: #27ae60;
  background-color: #e9f7ef;
}

.bad {
  color: #DB1144;
  background-color: #fce7ec;
}