* {
  box-sizing: border-box;
}

html {
  margin: 0;
  padding: 0;
  text-align: center;
  height: 100%;
}

body {
  position: relative;
  height: 100%;
  background: #fafafa;
  color: #555555;
}

p {
  margin: 0;
}

.header-container {
  background-color: #fff;
  padding: 0.8em;
  position: absolute;
  width: 100%;
  box-shadow: 0 2px 8px -2px rgba(10, 15, 17, 0.3);
}

.site-logo {
  width: 52px;
}

.container {
  display: grid;
  place-items: center;
  height: 100%;
  padding: 0.8em;
}

.card {
  margin: 0 auto;
  padding: 5.2em 1.6em;
  box-sizing: border-box;
  background: #fff;
  text-align: center;
  box-shadow: 0 2px 8px -2px rgba(10, 15, 17, 0.3);
  border-radius: 8px;
  min-width: 500px;
}

.message {
  font-size: 1.6em;
  margin-bottom: 1.6em;
  font-weight: bold;
}

.date-wrap {
  color: #fff;
  background: #18213c;
  margin: 0 auto;
  margin-bottom: 1.6em;
  width: 95%;
  padding: 0.4em 1.2em;
  line-height: 24px;
}

.description-wrap {
  line-height: 24px;
  width: 95%;
  margin: 0 auto;
}

@media screen and (max-width: 520px) {
  /* 520px以下の時に使用するCSSを記載  */
  .card {
    min-width: 100%;
  }
}
* {
  box-sizing: border-box;
}

html {
  margin: 0;
  padding: 0;
  text-align: center;
  height: 100%;
}

body {
  position: relative;
  height: 100%;
  background: #fafafa;
  color: #555555;
}

p {
  margin: 0;
}

.header-container {
  background-color: #fff;
  padding: 0.8em;
  position: absolute;
  width: 100%;
  box-shadow: 0 2px 8px -2px rgba(10, 15, 17, 0.3);
}

.site-logo {
  width: 52px;
}

.container {
  display: grid;
  place-items: center;
  height: 100%;
  padding: 0.8em;
}

.card {
  margin: 0 auto;
  padding: 5.2em 1.6em;
  box-sizing: border-box;
  background: #fff;
  text-align: center;
  box-shadow: 0 2px 8px -2px rgba(10, 15, 17, 0.3);
  border-radius: 8px;
  min-width: 500px;
}

.message {
  font-size: 1.6em;
  margin-bottom: 1.6em;
  font-weight: bold;
}

.date-wrap {
  color: #fff;
  background: #18213c;
  margin: 0 auto;
  margin-bottom: 1.6em;
  width: 95%;
  padding: 0.4em 1.2em;
  line-height: 24px;
}

.description-wrap {
  line-height: 24px;
  width: 95%;
  margin: 0 auto;
}

@media screen and (max-width: 520px) {
  /* 520px以下の時に使用するCSSを記載  */
  .card {
    min-width: 100%;
  }
}