@charset "UTF-8";

/* =========================================================
   LINK PAGE LAYOUT
========================================================= */

.link-grid {
  display: flex;
  gap: 20px;
  width: 100%;
  box-sizing: border-box;
}

.link-column {
  flex: 1;
  min-width: 0;
  box-sizing: border-box;
}

/* =========================================================
   LINK BOX
========================================================= */

.link-box {
  background: #fff;
  border: 1px solid #ccc;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 20px;
}

.link-box > summary {
  background: #eaf6ff;
  padding: 12px 14px;
  cursor: pointer;
  font-weight: bold;
  display: flex;
  gap: 8px;
  align-items: center;
  border-bottom: 1px solid #ccc;
  list-style: none;
}

.link-box > summary::-webkit-details-marker {
  display: none;
}

.link-box > summary::marker {
  content: "";
}

.link-box > summary::before {
  content: "▶";
  flex: 0 0 auto;
}

.link-box[open] > summary::before {
  content: "▼";
}

.link-box > ul {
  padding: 10px 14px;
  margin: 0;
}

/* =========================================================
   SUB BOX（内側details）
========================================================= */

.sub-box {
  width: 100%;
  box-sizing: border-box;
  margin: 10px 0 0;
  border: 1px solid #ddd;
  border-radius: 4px;
  overflow: hidden;
}

.sub-box summary {
  background: #f7f7f7;
  padding: 8px 10px;
  cursor: pointer;
  font-weight: bold;
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.sub-box summary::-webkit-details-marker {
  display: none;
}

.sub-box summary::marker {
  content: "";
}

.sub-box summary::before {
  content: "▶";
  flex: 0 0 auto;
}

.sub-box[open] summary::before {
  content: "▼";
}

.sub-box ul {
  width: 100%;
  box-sizing: border-box;
  padding: 10px 14px;
  margin: 0;
}

/* =========================================================
   LINK LIST / LINKS
========================================================= */

.link-box a,
.sub-box a {
  color: #004a80;
  text-decoration: none;
}

.link-box a:hover,
.sub-box a:hover {
  text-decoration: underline;
}

/* =========================================================
   AKI BOX
========================================================= */

.aki-box {
  background: #e8f4ff;
  border: 2px solid #6ea8d9;
}

.aki-box > summary {
  background: #6ea8d9;
  color: #fff;
}