Add button-hover exercise
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# Button Hover
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Use a transition to increase the font-size property of the button when you hover your mouse over it.
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## Desired Outcome
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### Self Check
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- Does the font-size property change to increase the size?
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- Do other properties of the button remain unchanged?
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- Does the `:hover` pseudo-class trigger the transition?
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<!DOCTYPE html>
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<html lang="en">
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  <head>
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    <meta charset="UTF-8" />
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    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
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    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
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    <title>Button Hover</title>
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    <link rel="stylesheet" href="style.css" />
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  </head>
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  <body>
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    <div id="transition-container">
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      <button>Transition!</button>
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    </div>
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  </body>
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</html>
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#transition-container {
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  width: 100vw;
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  height: 100vh;
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  display: flex;
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  flex-direction: column;
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  justify-content: center;
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  align-items: center;
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  font-family: Arial, sans-serif;
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}
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button {
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  width: 158px;
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  height: 55px;
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  border: 1px solid black;
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  border-radius: 5px;
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  background-color: white;
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  color: black;
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  font-size: small;
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  text-align: center;
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}
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/* SOLUTION */
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/* disclaimer: duplicating the `button` element here isn't best practice.
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In your solution you probably put it right inside the existing `button`,
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which _is_ the best practice. 
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We separated it out here to make it extra clear what has changed. */
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button {
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  transition: font-size 1s ease-out 0.25s;
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}
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button:hover {
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  font-size: x-large;
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  cursor: pointer;
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}
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<!DOCTYPE html>
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<html lang="en">
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  <head>
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    <meta charset="UTF-8" />
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    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
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    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
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    <title>Button Hover</title>
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    <link rel="stylesheet" href="solution.css" />
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  </head>
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  <body>
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    <div id="transition-container">
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      <button>Transition!</button>
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    </div>
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  </body>
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</html>
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#transition-container {
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  width: 100vw;
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  height: 100vh;
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  display: flex;
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  flex-direction: column;
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  justify-content: center;
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  align-items: center;
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  font-family: Arial, sans-serif;
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}
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button {
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  width: 158px;
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  height: 55px;
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  border: 1px solid black;
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  border-radius: 5px;
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  background-color: white;
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  color: black;
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  font-size: small;
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  text-align: center;
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}
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