:root {
    --bg-color: #121212;
    --text-color: #ffffff;
    --header-bg: #1e1e1e;
    --menu-bg: #292929;
    --card-bg: #212121;
    --accent-color: #9ada62; /* #3d8af7; */
    --popup-bg: rgba(40, 40, 40, 0.95);
}
.light-mode {
    --bg-color: #f5f5f5;
    --text-color: #333333;
    --header-bg: #ffffff;
    --menu-bg: #f0f0f0;
    --card-bg: #ffffff;
    --accent-color: #7ed957; /* #3d8af7; */
    --popup-bg: rgba(245, 245, 245, 0.95);
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
body {
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    position: relative;
    /* overflow: hidden繧貞炎髯､縺励※繧ｹ繧ｯ繝ｭ繝ｼ繝ｫ繧定ｨｱ蜿ｯ */
}
@media (min-width: 632px) {
    body {
        max-width: 632px;
        margin: 0 auto;
    }
}
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background-color: var(--header-bg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: relative;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
}
.header-icon {
    font-size: 24px;
    cursor: pointer;
    color: var(--text-color);
    width: 24px;
    height: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.header-logo {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
}
.logo {
    height: 30px;
    width: auto;
}
.content {
    padding-top: 60px; /* 繝倥ャ繝€繝ｼ縺ｮ鬮倥＆縺ｫ繧医▲縺ｦ隱ｿ謨ｴ */
    min-height: calc(100vh - 120px);
    position: relative;
    /* overflow: hidden 繧貞炎髯､縺励※繧ｹ繧ｯ繝ｭ繝ｼ繝ｫ繧定ｨｱ蜿ｯ */
}
.tab-content {
    height: 100%;
    display: none;
}
.tab-content.active {
    display: block;
}
@media (min-width: 632px) {
    .header {
        max-width: 632px;
        left: 50%;
        transform: translateX(-50%);
    }
}
.album-container {
    /* padding-top: 60px; */
    width: 100%;
    min-height: calc(100vh - 120px);
    position: relative;
    display: flex;
    justify-content: center;
    align-items: flex-start; /* 繧ｻ繝ｳ繧ｿ繝ｼ縺九ｉ繝医ャ繝励↓螟画峩 */
    padding-bottom: 60px; /* 繝懊ヨ繝�繝翫ン繧ｲ繝ｼ繧ｷ繝ｧ繝ｳ縺ｮ鬮倥＆蛻�ｒ遒ｺ菫� */
    /* overflow: hidden 繧貞炎髯､縺励※繧ｹ繧ｯ繝ｭ繝ｼ繝ｫ繧定ｨｱ蜿ｯ */
}
.image-card {
    position: relative; /* absolute縺九ｉrelative縺ｫ螟画峩縺励※騾壼ｸｸ縺ｮ繝輔Ο繝ｼ縺ｫ */
    width: 80%;
    margin: 20px auto; /* 荳贋ｸ九�菴咏區繧定ｿｽ蜉� */
    background-color: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    /* overflow: hidden 繧貞炎髯､縺励※繧ｹ繧ｯ繝ｭ繝ｼ繝ｫ繧定ｨｱ蜿ｯ */
    transform: translateX(0) rotate(0deg);
    transition: transform 0.3s ease;
    z-index: 1;
}
.image-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    overflow-y: auto; /* 邵ｦ繧ｹ繧ｯ繝ｭ繝ｼ繝ｫ繧定ｨｱ蜿ｯ */
    max-height: none; /* 譛€螟ｧ鬮倥＆縺ｮ蛻ｶ髯舌ｒ隗｣髯､ */
    -webkit-overflow-scrolling: touch; /* iOS縺ｧ縺ｮ繧ｹ繝�繝ｼ繧ｺ繧ｹ繧ｯ繝ｭ繝ｼ繝ｫ */
    padding-top: 40px; /* 逕ｻ蜒乗ュ蝣ｱ縺ｮ鬮倥＆蛻�ｒ遒ｺ菫� */
}
.album-image {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block; /* 繧､繝ｳ繝ｩ繧､繝ｳ菴咏區繧貞炎髯､ */
}
.image-info {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 10px;
    text-align: center;
    background-color: var(--menu-bg);
    color: var(--text-color);
    z-index: 2;
}
.bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--header-bg);
    z-index: 100;
}
.nav-item {
    flex: 1;
    padding: 15px;
    text-align: center;
    cursor: pointer;
}
.nav-item.active {
    color: var(--accent-color);
    border-top: 2px solid var(--accent-color);
}
.hamburger-menu {
    position: fixed;
    top: 0;
    left: -300px;
    width: 250px;
    height: 100vh;
    background-color: var(--menu-bg);
    z-index: 200;
    /* padding: 20px; */
    transition: left 0.3s ease;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
}
.hamburger-menu-item {
    padding: 20px;
}
.hamburger-menu.open {
    left: 0;
}
.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 150;
    display: none;
}
.menu-overlay.open {
    display: block;
}
.menu-header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 20px;
    border-bottom: 1px solid #ccc;
}
.menu-close {
    width: 100%;
    background-color: var(--bg-color);
}
.hamburger-menu-close {
    /* border: 1px solid var(--text-color); */
    cursor: pointer;
    /* font-size: 24px; */
    text-align: left;
    padding: 15px;
    box-sizing: border-box;
}
.setting-menu-close {
    border-radius: 5px;
    cursor: pointer;
    text-align: left;
    box-sizing: border-box;
    padding: 8px;
    border: 1px solid #ccc;
    background-color: var(--bg-color);
}
.menu-item {
    width: 100%;
    color: var(--text-color);
    display: block;
}
.menu-item a {
    display: block;
    cursor: pointer;
    padding: 10px 15px;
    width: 100%;
    text-decoration: none;
    color: var(--text-color);
}
.menu-item a:hover {
    background-color: var(--accent-color);
    color: var(--bg-color);
}
.popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px;
    background-color: var(--popup-bg);
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    z-index: 300;
    display: none;
}
.message-popup {
    padding: 15px 30px;
    text-align: center;
    min-width: 200px;
}
.settings-popup {
    width: 300px;
}
.popup-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}
.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}
.mode-toggle {
    cursor: pointer;
    padding: 8px;
    background-color: var(--accent-color);
    border-radius: 50%;
    color: white;
    width: 36px;
    height: 36px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.group-selector {
    width: 100%;
    padding: 8px;
    border-radius: 5px;
    border: 1px solid #ccc;
    background-color: var(--bg-color);
    color: var(--text-color);
}
.notifications-container {
    padding: 20px;
    padding-bottom: 60px;
    overflow-y: auto;
    height: 100%;
}
.notification-item {
    padding: 15px;
    margin-bottom: 15px;
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.notification-item a {
    text-decoration: none;
    color: var(--accent-color);
}
.notification-title {
    font-weight: bold;
    margin-bottom: 5px;
}
.notification-date {
    font-size: 0.8em;
    color: #888;
    margin-bottom: 10px;
}
.notification-content {
    line-height: 1.5;
}
.notification-image {
    width: 100%;
    height: auto;
}
/* 繧｢繧ｹ繝壹け繝域ｯ�1:1縺ｮ豁｣譁ｹ蠖｢繧剃ｽ懈� */
.gallery {
    /* padding: 20px 5px 5px 5px; */
    padding: 0px 5px 5px 5px;
    padding-bottom: 60px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 5px;
    max-width: 1200px;
    margin: 0 auto;
}
.image-gallery-link {
    display: block;
    text-decoration: none;
    color: inherit;
}  
.image-gallery-container {
    position: relative;
    width: 100%;
    padding-bottom: 100%; /* 繧｢繧ｹ繝壹け繝域ｯ�1:1縺ｮ豁｣譁ｹ蠖｢繧剃ｽ懈� */
    /* background-color: #e0e0e0; */
    background-color: var(--card-bg);
    overflow: hidden;
    /* border-radius: 8px; */
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.image-gallery-link:hover .image-container {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
.image-gallery-container img {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    max-width: 100%;
    max-height: 100%;
    object-fit: contain; /* 逕ｻ蜒上ｒ豁｣譁ｹ蠖｢蜀�↓蜿弱ａ繧� */
}
.ad-notification {
    padding: 10px;
    margin-bottom: 10px;
    background-color: var(--card-bg);
    /* box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); */
    margin-top: 10px;
}
.square-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.square-content img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}
.ad-notification a {
    text-decoration: none;
    color: var(--accent-color);
}
canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    pointer-events: none;
}
.scroll-container {
  width: 100%;
  height: 371;
  overflow: auto;
}
.toc ul {
  list-style: none;
  padding-left: 1em;
}
.toc li {
  margin-bottom: 0.5em;
}
.legend {
  font-size: 14px;
  margin-top: 10px;
}
.legend .line {
  display: inline-block;
  width: 20px;
  height: 3px;
  margin-right: 8px;
  vertical-align: middle;
}
.color1 { background-color: magenta; }
.color2 { background-color: lightgreen; }
.color3 { background-color: cornflowerblue; }
.color4 { background-color: red; }
.color5 { background-color: cyan; }
.color6 { background-color: yellow; }
.chart-container {
    margin-bottom: 60px;
}