Сергей

<div class="header">
  <div class="bar">
    <input class="pass" type="password">
    <input class="but" type="button">
  </div>
</div>

.header {
  background: #000;
  width: 900px;
  height: 150px;
  margin: 40px auto;
}
.bar {
  background: #111;
  width: 100px;
  height: auto;
  float: right;
  margin: 10px;
}

.pass {
  width: 100px;
  margin-bottom: 10px;
}
.but{
  width: 70px;
}