.nav-menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
}

.nav-menu li {
  position: relative;
}

.nav-menu a {
  display: block;
  padding: 10px 15px;
  text-decoration: none;
  color: #333;
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: #ff0000;/*#fff; change 0402*/
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  min-width: 150px;
  z-index: 1000;
}

/* Documentation ドロップダウンの背景を Community と同じにする */
.dropdown-menu {
  min-width: 190px;
  background-color: #fff;   /* Communityと同じ色 */
  border: 1px solid #ddd;   /* 枠線も揃える */
  padding: 8px 10px; /* add 0402*/
}

.dropdown-content li a {
  padding: 10px;
  white-space: nowrap;
}

.dropdown:hover .dropdown-content {
  display: block;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr); /* ←3列 */
  gap: 20px; /* 要素の間隔 */
}

.news-item {
  border: 1px solid #ddd;
  padding: 12px;
  background: #fff;
}

.news-item img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

/* thumb size */

.news-thumb {
  width: 100%;
  height: 160px;          /* サムネ枠の高さ */
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f5f5f5;    /* 余白色 */
  overflow: hidden;
}

.news-thumb img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}

/*.news-thumb {
  aspect-ratio: 16 / 9;  /* 好きな比率 */
/*  overflow: hidden;
}

/*.news-thumb img {
  width: 100%;
  height: 160%;
  object-fit: contain;
  background: #f5f5f5; /* 余白の色（任意） */
/*  width: 100%;
  height: 100%;
   object-fit: cover;*/
*/}*/

.news-item h3 {
  font-size: 1rem;
  margin: 8px 0;
}

.news-item .date {
  font-size: 0.85rem;
  color: #666;
}

/*  */
@media (max-width: 900px) {
  .news-grid {
    grid-template-columns: repeat(2, 1fr); /* タブレット：2列 */
  }
}

@media (max-width: 600px) {
  .news-grid {
    grid-template-columns: 1fr; /* スマホ：1列 */
  }
}

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

.news-more-wrap {
  text-align: right;
}

.news-more {
  display: inline-block;      /* ←これ重要 */
  background-color: #dc6226;  /* 背景色 */
  color: #fff;                /* 白文字 */
  padding: 8px 16px;          /* ←四角の大きさ */
  text-decoration: none;
  font-weight: 600;
  border-radius: 4px;         /* 角丸（任意） */
}

.news-more:hover {
/* background-color: #c9541f;  /* hoverで少し暗く */
 background-color: #dc143c;  /* hoverで少し暗く */
}

.news-title a {
  color: #dc6226;        /* ←好きな色に変更 */
  text-decoration: none; /* 下線消す（任意） */
}

.news-title a:hover {
  color: #db2525;        /* ホバー時の色 */
  text-decoration: underline;
}

.news-date-wrap {
  display: block;
  /*display: inline-block;*/
  border-bottom: 1px solid #ccc;  /* ←下線 */
  /*padding-bottom: 2px;            /* ←文字との間隔調整 */
  padding-top: 15px; 
}

.news-date-day {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  width: 2.2em;
  height: 1.8em;

  background-color: #aaaaaa;
  color: #fff;

  /*font-family: "MS P Gothic";*/
  font-family: "Helvetica";
  font-size: 20pt;
  font-weight: bold;
/*  border-radius: 6px;*/
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.news-date {
  font-size: 15pt;
  justify-content: center;
  /*font-size: 0.85rem;*/
  padding-right: 3px; 
  padding-left: 3px; 
}

/*.news-more {
  display: block;
  width: 100%;
  background-color: #dc6226;
  text-align: right;
  color: #fff;
  text-decoration: none;
  padding: 10px 16px;
  box-sizing: border-box;
}*/

/*.news-more {
background-color: #dc6226;
text-align: right;
}*/

	.top-swiper .swiper-slide {
  width: 100%;
  height: 335px; /* 任意 */
  display: flex;
  justify-content: center;
  align-items: center;
  background: #f5f5f5; /* 余白用（任意） */
}

.top-swiper .swiper-slide img {
  width: auto;
  height: 100%;
  max-width: 100%;
  object-fit: contain;
}

.page-toc {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border: 1px solid #a3c1cc; /*5a6a70; /* ddd;*/
  background: #f8f8f8;
}

.page-toc-title {
  font-weight: bold;
  margin-bottom: 0.75rem;
}

.page-toc-list{
  margin: 0;
  padding-left: 1.2rem;
}

.page-toc-list,
.page-toc-list ul {
  list-style: none;
  padding-left: 0;
}

.page-toc-list .toc-item {
  margin: 0.35rem 0;
}

.page-toc-list .toc-h2 {
  margin-left: 0;
}

.page-toc-list .toc-h3 {
  margin-left: 1rem;
}

.page-toc-list .toc-h4 {
  margin-left: 2rem;
}
/* add for logo title nav-bar */
/*.site-header-custom .container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.site-header-top {
  width: 30%;
  width: 100%;
  padding: 0.5rem 0 0.25rem;
}
*/
/*.site-header-bottom {
  width: 100%;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-brand-logo {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.site-brand-text {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
}

.site-header-bottom .navbar-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}*/

/* add 0402*/
/* ┌────────────────────────────┐*/
/* │  [ロゴ]  OpenRTM-aist      │ ← 上段*/
/* │  Home  Docs  About ...     │ ← 下段*/
/* └────────────────────────────┘*/

/* ===== ヘッダー全体 ===== */
.site-header .container {
  display: flex;
  flex-direction: column;   /* ← 縦並びにする */
}

/* ===== 1段目 ===== */
.site-header-top {
  display: flex;
  align-items: center;
  padding: 0.6rem 0 0.3rem;
}

/* ロゴ + サイト名 */
.site-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
}

/* ロゴサイズ（ここで自由に変更） */
.site-brand-logo {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

/* サイト名 */
.site-brand-text {
  font-size: 1.4rem;
  font-weight: bold;
  color: #fff;
  white-space: nowrap;
}

/* ===== 2段目 ===== */
.site-header-bottom {
  width: 100%;
}

/* ナビ横並び */
.site-header-bottom .navbar-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* 余白調整（任意） */
.site-header-bottom .nav-link {
  padding: 0.4rem 0.8rem;
}
/* header for 2 段*/
header.navbar > .container {
  display: flex !important;
  flex-direction: column !important;
  align-items: flex-start !important;
}

header.navbar .navbar-collapse {
  width: 100%;
}
/* lang-switch  css  */

.lang-switch {
  display: inline-flex;   /* ←ここ重要 */
  align-items: center;
  margin-left: 0.5rem;    /* タイトルとの間隔 */
}

.lang-link img {
  display: inline-block;  /* block → inline-block に変更 */
  width: 32px;
  height: auto;
  vertical-align: middle;
}

/* lang-switch  css  new */
.lang-switch {
  display: inline-flex;
  align-items: center;
  margin-left: 0.5rem;
}

.lang-link img {
  display: inline-block;
  width: 32px;
  height: auto;
  vertical-align: middle;
}