message: better editing style
diff: .header {
  border-bottom: 1px solid #CECECE;
  + padding: 5px;
  }
  .header input {
  - border-width: 0;
  + border-color: transparent;
  font-weight: 500;
  font-size: 16px;
  - padding: 10px 15px;
  + cursor: pointer;
  +}
  +
  +.header input:hover {
  + border-color: #F3F3F3;
  +}
  +
  +.header input:focus {
  + border-color: #CECECE;
  + cursor: initial;
  }
  