html {
  font-size: 62.5%; /* 16px × 62.5% = 10px */
  scroll-behavior: smooth;
}
body {
  font-family: "Open Sans", "ヒラギノ角ゴ ProN W3", Hiragino Kaku Gothic ProN,
    "メイリオ", Meiryo, sans-serif;
  font-size: 1.6rem;
  color: #222;
}
a:visited {
  color: #222;
}
.text-center {
  text-align: center;
  background-size: cover;
  background-position: center top;
}

::placeholder {
  color: #aaa;
}

/* タイトルエリア */
.title_area {
  position: absolute;
  top: 0px;
  left: 20px;
  background: rgba(255, 255, 255, 0.7);
  display: flex;
  align-items: center;
}
.logo {
  padding: 2px;
  height: 50px;
}
.icon {
  padding: 2px 0 0;
  height: 20px;
}
.title_area h2 {
  font-size: 2.0rem;
  font-weight: bold;
  margin: 0 20px 0 0;
}
.title_area a {
  padding: 5px;
}

/* コンテンツエリア */
.container {
  position: absolute;
  top: 75px;
  left: 20px;
  line-height: 1.4;
}
.container p {
  margin: 0 0 0 10px;

}
.container a {
  font-size: 1.0rem;
}

.edit_link {
  margin: 0 0 0 10px; 
}

.new_member {
  margin: 0 0 5px 0px;
}

.new_category {
  margin: 5px 0 0 0;
}

h3 {
  font-size: 1.8rem;
  font-weight: bold;
  margin: 20px 0 10px;
}

h4 {
  font-size: 1.6rem;
  color: #f00;
  font-weight: bold;
  margin: 20px 0 0 10px;
}

h5 {
  font-size: 1.6rem;
  color: #00f;
  font-weight: bold;
  margin: 20px 0 0 10px;
}

.image_post {
  margin: 10px 0 0 0;
}

/* フォーム入力 */

.form_entry {
  display: flex;
  align-items: flex-end;
  margin: 10px 0;
}

.form_entry>p{
  width: 100px;
  text-align: left;
}

.form_entry>input{
  width: 225px;
  text-align: left;
}

.form_submit {
  margin: 0 0 30px 110px;  
}

/* index.php の一覧 */

/* リスト全体 */
.title_and_selections {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
}

.selections {
  display: flex;
  align-items: baseline;
  margin: 0 0 10px 10px;
  font-size: 1.4rem;
}

.selections>div {
  margin: 0 0 0 10px;
}

.item_lists { 
  display: flex;
  flex-wrap: wrap;
} 

/* 1要素（画像・説明セット） */
.item_set {
  margin: 0 10px 10px 0;
}
.item_set img {
  width: 200px;
}

/* 説明部分 */
.item_description {
  max-width: 200px;
}
.item_description td {
  font-size: 1.2rem;
  padding: 0 0 4px 0;
  line-height: 1.2;
}
.edit_delete{
  margin: 15px 0 0 0px;
}
.td_a {
  width: 32px;
}
.item_id {
  font-size: 2.0rem;
  font-weight: bold;
  line-height: 1.5;
}
.item_state {
  font-size: 1.2rem;
  margin: 0 0 0 10px;
  display: flex;
  align-items: flex-start;
}
.item_state>a {
  margin: 0 0 0 10px;
}
.item_titlearea {
  display: flex;
  align-items: center;
}

#video {
  width: 320px;
  height: 240px;
}

#video, #canvas {
  width: 320px;
}

#photo_select {
  margin: 20px 0;
}

#photo_submit {
  margin: 5px 0 0 0;
}

#preview img { /* アップロード画像のプレビュー */
  margin: 5px 0 0 0;
  width: 320px;
}

.add_member {
  display: flex;
  flex-direction: column;
}

ul, ol {
  margin: 0 0 0 20px;
  width: 305px;
}

li {
  margin: 10px 0;
  font-size: 1.4rem;
}

.ul2 {
  margin: 0 0 0 15px;
  width: 280px;
}

.li2 {
  margin: 5px 0;
}