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Задача

Стильный способ показать описание для пользователя при наведении на компонент с которым еще не знаком.

HTML

<!DOCTYPE html>
<html lang="EN">
<head>
    <meta charset="UTF-8">
    <title>Info Card</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
<div class="card" tabindex="0">
  <span class="card_infoicon">
   <span class="card_text">i</span>
  </span>
    <h1 class="card_title">Information massage</h1>
    <p class="card_description">We track sessions with cookies</p>
</div>
</body>
</html>

CSS

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    display: grid;
    place-content: center;
    align-items: center;
    font-family: "nunito", sans-serif;
    background-color: #0099ff;
}

.card {
    position: relative;
    padding: 42px 32px;
    clip-path: circle(5% at 95% 12%);
    transition: all ease-in-out 0.3s;
    background-color: #ffffff;
}

.card_text {
    font-size: 20px;
    position: relative;
}

.card_infoicon {
    position: absolute;
    top: 10px;
    right: 25px;
    font-size: 1.4em;
    color: #000000;
    transition: ease-out 0.3s;
}

.card_title {
    margin: 0;
    font-size: 3em;
    line-height: 1.8;
}

.card_description {
    margin: 0;
    font-size: 1.1em;
    line-height: 1.6;
}

.card_credits {
    margin: 0;
    padding: 4px 0;
    font-size: 1.1em;
}

.card_reference {
    display: inline-block;
    border-bottom: 1px solid transparent;
    color: #0099ff;
    text-decoration: none;
    transition: ease-in 0.3s;
}

.card_reference:hover {
    border-bottom-color: #0099ff;
}

.card:hover, .card:focus {
    clip-path: circle(75%);
    border-radius: 20px;
    box-shadow: 0 3px 9px rgba(0, 0, 0, 0.12), 0 3px 18px rgba(0, 0, 0, 0.08);
    background: #ffffff;
    outline: none;
}

.card:hover .card_infoicon, .card:focus .card_infoicon {
    opacity: 0;
}

.card:focus {
    box-shadow: 0 3px 9px rgba(0, 0, 0, 0.12), 0 3px 18px rgba(0, 0, 0, 0.08), 0 0 0 4px rgba(0, 0, 0, 0.2);
}