<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {
    font-family: Arial
}

* {
    box-sizing: border-box;
}

/* The browser window */
.container {
    border: 3px solid #f1f1f1;
    border-top-left-radius: 4px;
    border-top-right-radius: 4px;
}

/* Container for columns and the top "toolbar" */
.row {
    padding: 10px;
    background: #f1f1f1;
    border-top-left-radius: 4px;
    border-top-right-radius: 4px;
}

/* Create three unequal columns that floats next to each other */
.column {
    float: left;
}

.left {
    width: 15%;
}

.right {
    width: 10%;
}

.middle {
    width: 75%;
}

/* Clear floats after the columns */
.row:after {
    content: "";
    display: table;
    clear: both;
}

/* Three dots */
.dot {
    margin-top: 4px;
    height: 12px;
    width: 12px;
    background-color: #bbb;
    border-radius: 50%;
    display: inline-block;
}

/* Style the input field */
input[type=text] {
    width: 100%;
    border-radius: 3px;
    border: none;
    background-color: white;
    margin-top: -8px;
    height: 25px;
    color: #666;
    padding: 5px;
}

/* Three bars (hamburger menu) */
.bar {
    width: 17px;
    height: 3px;
    background-color: #aaa;
    margin: 3px 0;
    display: block;
}

/* Page content */
.content {
    padding: 10px;
}
</style>

<div class="container">
  <div class="row">
    <div class="column left">
      <span class="dot" style="background:#ED594A;"></span>
      <span class="dot" style="background:#FDD800;"></span>
      <span class="dot" style="background:#5AC05A;"></span>
    </div>
    <div class="column middle">
      <input type="text" value="http://html5css.ru">
    </div>
    <div class="column right">
      <div style="float:right">
        <span class="bar"></span>
        <span class="bar"></span>
        <span class="bar"></span>
      </div>
    </div>
  </div>

  <div class="content">
    <h3>Browser Window</h3>
    <p>How to create a detailed browser window look with CSS.</p>
  </div>
</div>