CSS3 の新機能の概要: CSS3 を使用して Web ページのレイアウトを変更する方法

<div class="album">
  <div class="photo"></div>
  <div class="photo"></div>
  <div class="photo"></div>
</div>

.album {
  display: flex;
  flex-wrap: wrap;
}

.photo {
  width: 200px;
  height: 200px;
}

<div class="news-grid">
  <div class="header"></div>
  <div class="sidebar"></div>
  <div class="main"></div>
  <div class="footer"></div>
</div>

.news-grid {
  display: grid;
  grid-template-rows: 100px 1fr 100px;
  grid-template-columns: 1fr 1fr;
}

.header {
  grid-row: 1;
  grid-column: 1 / span 2;
}

.sidebar {
  grid-row: 2;
  grid-column: 1;
}

.main {
  grid-row: 2;
  grid-column: 2;
}

.footer {
  grid-row: 3;
  grid-column: 1 / span 2;
}

<div class="multi-column">
  <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
  <p>Proin eu nunc ut leo dictum laoreet.</p>
  <p>Duis non ipsum sed metus accumsan viverra eu et quam.</p>
  <p>Maecenas venenatis cursus dolor, at consequat massa auctor in.</p>
</div>

.multi-column {
  columns: 2;
  column-gap: 20px;
}

<button class="button">Click me</button>

.button {
  background-color: blue;
  color: white;
  transition: background-color 0.3s;
}

.button:hover {
  background-color: red;
}

<img  class="rotate" src="image.jpg" alt="CSS3 の新機能の概要: CSS3 を使用して Web ページのレイアウトを変更する方法" >

.rotate {
  animation: rotate 5s infinite;
}

@keyframes rotate {
  0% {
    transform: rotate(0);
  }
  100% {
    transform: rotate(360deg);
  }
}