body, html {
  height:100vh;
  width:100vw;
  margin:0;
  padding:0;
}
body {
  display: flex;
  justify-content: center;
  align-items: center;
}

.password-page {
  width: 500px;
  background: #fafafa;
  padding: 30px;
  border-radius: 3px;
  box-shadow: 0px 0px 10px rgba(0,0,0,0.2);
}
.password-page input {
  width:100%;
  -webkit-appearance:none;
  display:block;
  box-sizing:border-box;
  border:1px solid #ddd;
  padding:12px;
  font-size:16px;
}
.password-page label {
  margin-top:40px;
  margin-bottom:8px;
}
.password-page .err {
  color:red;
}
.password-page input[type="submit"] {
  width:auto;
  margin-top:20px;
  cursor:pointer;
}
.password-page img {
  display:block;
  width: 100%;
  margin:0 auto;
}


@media screen and (max-width:800px){
  .password-page {
    box-shadow:none;
  }
  body {
    background: #fafafa;
  }
}