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Nice, compliant input boxes
<h1>Nice input box</h1>
<form>
<input type="text" name="name" class="question" id="nme" required autocomplete="off" />
<label for="nme"><span>What's your name?</span></label>
<textarea name="message" rows="2" class="question" id="msg" required autocomplete="off"></textarea>
<label for="msg"><span>What's your message?</span></label>
<input type="submit" value="Submit!" />
</form>
<div class="footer">
By <a href="http://atunnecliffe.com">Andrew Tunnecliffe</a>. <a href="mailto:andrew@atunnecliffe.com">Email</a>. <a href="http://codepen.io/atunnecliffe/">Other pens</a>.
</div>

Nice, compliant input boxes

Nice input box with a lot of styling based on sibling selectors and psuedo classes.

CSS only, and WCAG 2.0 AA compliant!

A Pen by Andrew Tunnecliffe on CodePen.

License.

/*
Basic input element using psuedo classes
*/
html {
font-family: 'Lora', sans-serif;
width: 100%;
}
body {
margin: 5% auto 0 auto;
width: 90%;
max-width: 1125px;
}
h1 {
font-size: 28px;
margin-bottom: 2.5%;
}
input,
span,
label,
textarea {
font-family: 'Ubuntu', sans-serif;
display: block;
margin: 10px;
padding: 5px;
border: none;
font-size: 22px;
}
textarea:focus,
input:focus {
outline: 0;
}
/* Question */
input.question,
textarea.question {
font-size: 48px;
font-weight: 300;
border-radius: 2px;
margin: 0;
border: none;
width: 80%;
background: rgba(0, 0, 0, 0);
transition: padding-top 0.2s ease, margin-top 0.2s ease;
}
/* Underline and Placeholder */
input.question + label,
textarea.question + label {
display: block;
position: relative;
white-space: nowrap;
padding: 0;
margin: 0;
width: 10%;
border-top: 1px solid red;
-webkit-transition: width 0.4s ease;
transition: width 0.4s ease;
height: 0px;
}
input.question:focus + label,
textarea.question:focus + label {
width: 80%;
}
input.question:focus,
input.question:valid {
padding-top: 35px;
}
textarea.question:valid,
textarea.question:focus {
margin-top: 35px;
}
input.question:focus + label > span,
input.question:valid + label > span {
top: -100px;
font-size: 22px;
color: #333;
}
textarea.question:focus + label > span,
textarea.question:valid + label > span {
top: -150px;
font-size: 22px;
color: #333;
}
input.question:valid + label,
textarea.question:valid + label {
border-color: green;
}
input.question:invalid,
textarea.question:invalid {
box-shadow: none;
}
input.question + label > span,
textarea.question + label > span {
font-weight: 300;
margin: 0;
position: absolute;
color: #8F8F8F;
font-size: 48px;
top: -66px;
left: 0px;
z-index: -1;
-webkit-transition: top 0.2s ease, font-size 0.2s ease, color 0.2s ease;
transition: top 0.2s ease, font-size 0.2s ease, color 0.2s ease;
}
input[type="submit"] {
-webkit-transition: opacity 0.2s ease, background 0.2s ease;
transition: opacity 0.2s ease, background 0.2s ease;
display: block;
opacity: 0;
margin: 10px 0 0 0;
padding: 10px;
cursor: pointer;
}
input[type="submit"]:hover {
background: #EEE;
}
input[type="submit"]:active {
background: #999;
}
input.question:valid ~ input[type="submit"], textarea.question:valid ~ input[type="submit"] {
-webkit-animation: appear 1s forwards;
animation: appear 1s forwards;
}
input.question:invalid ~ input[type="submit"], textarea.question:invalid ~ input[type="submit"] {
display: none;
}
@-webkit-keyframes appear {
100% {
opacity: 1;
}
}
@keyframes appear {
100% {
opacity: 1;
}
}
/* Footer, not needed */
.footer {
position: fixed;
bottom: 0;
left: 0;
width: 100%;
background: #F3F3F3;
text-align: center;
}
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