body {
  margin: 0;
  padding: 0;
  font-family: "Helvetica Neue", "Helvetica", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Arial", "Yu Gothic", "Meiryo", sans-serif; 
/*  font-family: "Helvetica Neue", "Helvetica", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Arial", "Meiryo", sans-serif; */
  font-size: 14px;
  font-weight: normal;
  text-align: left;
  line-height: 1.5;
  color: #222222;
  background-color: #ffffff;
}

.text-center {
  text-align: center;
}

.hidden {
  visibility: hidden;
}

header.page-header {
  height: 48px;
  background-color: #dbdbdb;
  display: flex;
  align-items: center;
}

header.page-header > h1 {
  text-align: left;
  margin-left: 16px;
  font-size: 20px;
}

main.page-main {
  display: flex;
  justify-content: space-around;
}

section.section-signin {
  display: flex;
  flex-direction: column;
  align-items: center;
}

section.section-signin > h2 {
  margin-top: 30px;
  margin-bottom: 15px;
  font-size: 20px;
}

form.form-signin {
  max-width: 320px;
}

form.form-signin input[type="text"],
form.form-signin input[type="password"] {
  box-sizing: border-box;
  width: 100%;
  height: auto;
  padding: 8px;
  border: 1px solid #505050;
  border-radius: 4px;
  margin-top: 5px;
  margin-bottom: 5px;
  font-size: 16px;
  line-height: 1.5;
  color: #505050;
  background-color: #ffffff;
  background-clip: padding-box;
}

form.form-signin ::placeholder {
  color: #666666;
}

form.form-signin input[type="checkbox"] {
  padding: 5px;
  margin: 5px;
  border: 3px solid blue;
  accent-color: #0470bf;
}

form.form-signin button {
  display: inline-block;
  width: 80%;
  padding: 8px 10px;
  border: 1px solid #0470bf;
  border-radius: 4px;
  margin-top: 12px;
  margin-bottom: 12px;
  font-size: 16px;
  line-height: 1.5;
  vertical-align: middle;
  color: #ffffff;
  background-color: #0470bf;
  user-select: none;
}

form.form-signin button:hover {
    opacity: 0.8;
}

form.form-signin button:active {
    transform: translate(0px, 2px);
}

.page-upright {
    margin: 0 16px 0 auto;
}

.page-upright a {
    text-decoration: none;
    color: inherit;
    border: 1px solid;
    padding: 4px;
    font-size: 12px;
    border-radius: 15%;
}