Sometimes its nice to be literal. These buttons look like their real-world keyboard counterparts, and have a nice "pressed" animation when the mouse overs over them.
This is accomplished by a very complicated box shadow. Each of the lines in the box-shadow code is a separate shadow - each a little bit darker than the last to give a gradual fading shadow.
Copy to clipboard<a href='#'><div id='button-example-1688'>Click here!</div></a>
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#button-example-1688 {
background-color: #AD665C; color: #fffff7; padding: 17px 40px; font-size: 18px; font-weight: 600; width: 200px; text-align: center; margin-bottom: 10px; border-radius: 3px; box-shadow: inset 0 1px 0 0 #A35B52, 0 1px 0 0 #95544B, 0 2px 0 0 #935148, 0 4px 0 0 #8e4d44, 0 5px 0 0 #894940, 0 6px 0 0 #82443b, 0 6px 7px 0 #7a3f37;
}#button-example-1688:hover {
transform: translateY(3px); box-shadow: inset 0 1px 0 0 #A35B52, 0 1px 0 0 #95544B, 0 2px 0 0 #8e4d44, 0 3px 0 0 #82443b, 0 4px 6px 0 #7a3f37;
}