ionic-framework/ionic/components/form/form.scss

// Forms
// --------------------------------------------------


form {
  margin: 0;
}

label,
input,
select,
textarea {
  line-height: normal;
  font-family: inherit;
}

textarea {
  margin: 0;
  padding: 0;
  height: auto;
  overflow: auto;
  color: inherit;
  font: inherit;
}

.platform-mobile textarea {
  resize: none;
}

ion-input {

  // text inputs
  textarea,
  input[type="text"],
  input[type="password"],
  input[type="datetime"],
  input[type="datetime-local"],
  input[type="date"],
  input[type="month"],
  input[type="time"],
  input[type="week"],
  input[type="number"],
  input[type="email"],
  input[type="url"],
  input[type="search"],
  input[type="tel"],
  input[type="color"] {
    display: block;
    background: transparent;
    border: 0;
    width: 100%;
  }

}


// Placeholder
// -------------------------------
input,
textarea {
  @include placeholder();
}


// DISABLED STATE
// -------------------------------

// Disabled and read-only inputs
input[disabled],
select[disabled],
textarea[disabled],
select[readonly] {
  cursor: not-allowed;
}


// Focus Utils
// -------------------------------

focus-holder input {
  position: fixed;
  top: 1px;
  width: 9px;
  left: -9999px;
  z-index: 9999;
}

/*focus-holder input[tabindex="999"] {
  left: 0px;
}

focus-holder input[tabindex="1001"] {
  left: 20px;
}

focus-holder input[tabindex="1002"] {
  left: auto;
  right: 10px;
}

focus-holder input:focus {
  background: red;
}*/