This is the example code for the article Your first HTML form.

A simple form

HTML Content

<form action="/my-handling-form-page" method="post">
    <label for="name">Name:</label>
    <input type="text" id="name" name="user_name">

    <label for="mail">E-mail:</label>
    <input type="email" id="mail" name="user_email">

    <label for="msg">Message:</label>
    <textarea id="msg" name="user_message"></textarea>

  <div class="button">
    <button type="submit">Send your message</button>

CSS Content

form {
  /* Just to center the form on the page */
  margin: 0 auto;
  width: 400px;

  /* To see the limits of the form */
  padding: 1em;
  border: 1px solid #CCC;
  border-radius: 1em;

div + div {
  margin-top: 1em;

label {
  /* To make sure that all label have the same size and are properly align */
  display: inline-block;
  width: 90px;
  text-align: right;

input, textarea {
  /* To make sure that all text field have the same font settings
     By default, textarea are set with a monospace font */
  font: 1em sans-serif;

  /* To give the same size to all text field */
  width: 300px;

  -moz-box-sizing: border-box;
       box-sizing: border-box;

  /* To harmonize the look & feel of text field border */
  border: 1px solid #999;

input:focus, textarea:focus {
  /* To give a little highligh on active elements */
  border-color: #000;

textarea {
  /* To properly align multiline text field with their label */
  vertical-align: top;

  /* To give enough room to type some text */
  height: 5em;

  /* To allow users to resize any textarea vertically
     It works only on Chrome, Firefox and Safari */
  resize: vertical;

.button {
  /* To position the buttons to the same position of the text fields */
  padding-left: 90px; /* same size as the label elements */

button {
  /* This extra margin represent the same space as the space between
     the labels and their text fields */
  margin-left: .5em;