<div class="container h-100">
  <div class="father h-100">
    <div class="child-1">
      <span class="mr-auto">
        <i class="far fa-folder"></i>
        <span>測試資料夾</span>
      </span>
      <span>
        <button class="mr-1" type="button">按鈕</button>
        <button type="button">按鈕</button>  
      </span>
    </div>
    <div class="child-2">
      <p>測試內容</p>
    </div>
  </div>  
</div>
* {
  font-family: "Noto Sans TC", 微軟正黑體;
  box-sizing: border-box !important;
}
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
  display: block;
}

html,body {
  height: 100%;
  width: 100vw;
}
ol, ul {
  list-style: none;
}
blockquote, q {
  quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
  content: '';
  content: none;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
button {
  border-radius: 22px;
  padding: 5px 10px;
  border: 0px;
  box-shadow: 0px 3px 6px 0px;
  cursor: pointer;
}
.h-100 {
  height: 100%;
}
.w-100 {
  width: 100%;
}
.d-flex{
  display: flex;
}
.ai-center {
  align-items: center;
}
.mr-auto {
  margin-right: auto;
}
.mr-1 {
  margin-right: 16px;
}
.container {
  padding: 10px;
}
.father {
  box-sizing: border-box;
  max-width: 900px;
  border-radius: 9px;
  display: flex;
  flex-direction: column;
  box-shadow: 0px 3px 6px 0 rgba(0, 0, 0, 0.3);
  padding: 16px;
}
.child-1 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 2px solid black;
  padding: 10px;
  margin-bottom: 10px;
}
.child-2 {
  flex-grow: 1;
  padding: 10px;
  border: 2px solid black;
}

External CSS

  1. https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.4/css/all.min.css

External JavaScript

This Pen doesn't use any external JavaScript resources.