/* Header
–––––––––––––––––––––––––––––––––––––––––––––––––– */

body {
    margin: 0;           /* ← 最重要：ブラウザのデフォルトマージンを削除 */
    padding: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

#main_top {
    display: flex;
    align-items: center;
    position: relative;
    padding: 15px 20px;
    background-color: #fcfcfc;
    width: 100%;
    height: 40px;
}

#title_logo {
    width: 40px;
    height: 40px;
    margin-right: 10px;
}

#title a{
    font-size: 24px;
    font-weight: 800;
    color: #333;
    letter-spacing: 0.03em;
    text-decoration: none;
}

#title :hover {
    color: #666;
}

#top_menu {
    display: flex;
    justify-content: center;
    align-items: flex-end; 
    margin: 0 60px 0 auto;
    gap: 60px;
}

.top_menu_icon {
    cursor: pointer;
    display: inline-block;
}

#top_menu a,
#top_menu div {
    color: #333;
    text-decoration: none;
    cursor: pointer;
    transition: color 0.2s;
}


.top_menu_icon :hover {
    color: #0000ffc2;
}

.top_menu_icon.active {
    color: #0000ffc2;
}


#pannels > div {
    position: absolute;
    top: 75%;
    background-color: #fcfcfc;
    z-index: 100;
}

.panel-title {
    font-size: 20px;
    font-weight: bold;
}

#export-panel {
    right: 380px;
    width: 180px;
    display: none;
}

#setting-panel {
    right: 150px;
    width: 380px;
    display: none;
}

#setting-panel > label {
    text-align: left;
    margin-left: 20px; 
}

#setting-panel .form-control {
    width: 60%;
    margin: 0 auto;
    text-align: left;
    height: auto;
    padding-top: 0.5rem;
}

#setting-panel .form-check {
    display: flex;
    width: 100%;
    height: auto;
    padding-left: 60px;
}

#setting-panel .form-check-input {
    position: relative; 
}

#setting-panel .form-check-label {
    text-align: left;
    padding-left: 10px;
    width: 50%;
}

.centerline-offset {
    height: auto;
}

#help-panel {
    right: 120px;
    width: 180px;
    display: none;
}

#pannels * {
    font-size: 16px;
    text-align: center;
}

.hr-divider {
    margin: 8px auto 8px 5%;   
    width: 90%;     
  }


#help-panel {
    right: 100px;
    width: 250px;
    display: none;
    text-align: left;
}

#user-panel {
    right: 20px;
    width: 250px;
    display: none;
}



/* Footer
–––––––––––––––––––––––––––––––––––––––––––––––––– */


#footer {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 10px;
    color: gray;
    height: 30px;
}