Inline Edit Cell

<div class="nuda-tbl-edit">
  <table class="nuda-tbl-edit__table">
    <thead>
      <tr>
        <th class="nuda-tbl-edit__th">Field</th>
        <th class="nuda-tbl-edit__th">Value</th>
        <th class="nuda-tbl-edit__th">Action</th>
      </tr>
    </thead>
    <tbody>
      <!-- Active editing row -->
      <tr class="nuda-tbl-edit__row">
        <td class="nuda-tbl-edit__td nuda-tbl-edit__td--label">Display name</td>
        <td class="nuda-tbl-edit__td">
          <div class="nuda-tbl-edit__field nuda-tbl-edit__field--editing">
            <input class="nuda-tbl-edit__input" value="Alex Johnson" />
          </div>
        </td>
        <td class="nuda-tbl-edit__td">
          <button class="nuda-tbl-edit__save">Save</button>
        </td>
      </tr>
      <!-- Read-only row -->
      <tr class="nuda-tbl-edit__row">
        <td class="nuda-tbl-edit__td nuda-tbl-edit__td--label">Username</td>
        <td class="nuda-tbl-edit__td">
          <div class="nuda-tbl-edit__field">
            <span class="nuda-tbl-edit__value">@alexj</span>
          </div>
        </td>
        <td class="nuda-tbl-edit__td">
          <button class="nuda-tbl-edit__edit">Edit</button>
        </td>
      </tr>
    </tbody>
  </table>
</div>

.nuda-tbl-edit {
  width: 100%;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,.1);
  overflow: hidden;
  background: #141414;
}

.nuda-tbl-edit__table {
  width: 100%;
  border-collapse: collapse;
  font-size: .78rem;
}

.nuda-tbl-edit__th {
  padding: .5rem .75rem;
  text-align: left;
  color: #777;
  font-weight: 600;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  background: #1a1a1a;
  border-bottom: 1px solid rgba(255,255,255,.1);
}

.nuda-tbl-edit__td {
  padding: .4rem .75rem;
  color: #cfcfcf;
  border-bottom: 1px solid rgba(255,255,255,.05);
  vertical-align: middle;
}

.nuda-tbl-edit__row:last-child .nuda-tbl-edit__td {
  border-bottom: none;
}

.nuda-tbl-edit__td--label {
  color: #777;
  font-size: .72rem;
}

.nuda-tbl-edit__field {
  display: flex;
  align-items: center;
}

.nuda-tbl-edit__field--editing {
  background: rgba(228,255,84,.05);
  border-radius: 5px;
  border: 1px solid rgba(228,255,84,.3);
  overflow: hidden;
}

.nuda-tbl-edit__input {
  background: transparent;
  border: none;
  outline: none;
  color: #fafafa;
  font-size: .78rem;
  padding: 4px 8px;
  width: 100%;
  font-family: inherit;
}

.nuda-tbl-edit__value {
  color: #cfcfcf;
}

.nuda-tbl-edit__save {
  padding: 3px 10px;
  border-radius: 5px;
  background: #e4ff54;
  border: none;
  color: #141414;
  font-size: .68rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity .12s;
}

.nuda-tbl-edit__save:hover {
  opacity: .85;
}

.nuda-tbl-edit__edit {
  padding: 3px 10px;
  border-radius: 5px;
  background: transparent;
  border: 1px solid rgba(255,255,255,.15);
  color: #777;
  font-size: .68rem;
  cursor: pointer;
  transition: border-color .12s,color .12s;
}

.nuda-tbl-edit__edit:hover {
  border-color: rgba(255,255,255,.3);
  color: #cfcfcf;
}