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              <div class="wrap">
  <div class="lud-11 lud">
    <p class="sub-title">11. 隣り合うボックスレイアウトでは、ラインの代わりにコントラストを利用しよう。</p>
    <p>Using two slightly contrasted colors instead of using a line will be more pleasing to the eye and look more clean.</p>
    <div class="ex-11 example">
      <div class="modal">
        <div class="upper">
          <p>Are you sure you want to delete the post?</p>
        <div class="lower">
          <p>If you delete the post you'll never be able to see it again. Alternatively, you can do a back-up of it and then delete. To do this, head back to the post and look for the "Create Backup" button. Then click delete again.</p>
          <div class="actions">
            <button class="delete">Delete</button>
            <button class="cancel">Cancel</button>            
  margin: 0;
  outline: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', 'Open Sans', 'Roboto',YuGothic, "Yu Gothic", 游ゴシック体, 游ゴシック, "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", Roboto, メイリオ, Meiryo, "MS Pゴシック", Osaka, "MS PGothic", Arial, Helvetica, Verdana, sans-serif;

  margin: 2rem auto 0;
  width: 90%;
  max-width: 48rem;

  font-weight: normal;
  margin-bottom: 2rem;

.wrap p{
  font-size: 1.125rem;
  color: #444;
  line-height: 2;
  margin-bottom: 1rem;

.wrap a{
  color: #4687c9;

.wrap p.sub-title{
  font-size: 1.5rem;
  color: #222;
  margin-bottom: 1rem;
  line-height: 1.5;

  margin: 4rem 0 4rem;

.lud p:nth-child(3){
  font-size: 12px;
  font-style: italic;

  margin-top: 2.5rem;

/* サンプル用スタイリング */

  padding: 4rem;
  background: #ccc;

.ex-11 .modal{
  box-shadow: 0 1px 4px 0 rgba(0,0,0,.2);
  border-radius: 5px;

.ex-11 .upper{
  background: #fff;
  padding: .75rem 1.5rem;
  border-radius: 5px 5px 0 0;

.ex-11 .upper p{
  margin-bottom: 0;
  font-size: 1.25rem;

.ex-11 .lower{
  background: #f1f1f1;
  padding: 1.5rem;
  border-radius: 0 0 5px 5px;

.ex-11 .lower p{
  font-size: 1rem;
  color: #666;
  line-height: 1.8;

.ex-11 .actions{
  display: flex;
  justify-content: flex-end;
  margin-top: 2rem;

.ex-11 .actions button{
  border: none;
  padding: .375rem 1.75rem;
  border-radius: 5px;
  font-size: .875rem;
  font-weight: 500;
  cursor: pointer;
  text-transform: uppercase;

.ex-11 .actions .delete{
  color: #fff;
  background: hsl(5, 53%, 60%);

.ex-11 .actions .cancel{
  color: #444;
  background: transparent;
  margin-left: .5rem;

.ex-11 .delete:hover{
  background: hsl(5, 40%, 48%);

.ex-11 .cancel:hover{
  background: #ddd;
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