mempool/frontend/src/app/components/search-form/search-form.component.scss

:host ::ng-deep {
  .dropdown-item {
    white-space: nowrap;
    width: calc(100% - 34px);
  }
  .dropdown-menu {
    width: calc(100% - 34px);
  }
  @media (min-width: 768px) {
    .dropdown-item {
      width: 410px;
    }
    .dropdown-menu {
      width: 410px;
    }
  }
}

form {
  margin-top: 5px;
  @media (min-width: 576px) {
    margin-top: 0px;
    margin-left: 8px;
  }
  @media (min-width: 992px) {
    width: 100%;
  }
}

.btn-block {
  width: 62px;
}

.search-box-container {
  width: 100%;
  @media (min-width: 768px) {
    min-width: 400px;
  }
  @media (min-width: 992px) {
    min-width: 200px;
  }
  @media (min-width: 1200px) {
    min-width: 300px;
  }
  input {
    border: 0px;
  }
  .btn {
    width: 100px;
  }
}