/* ===== デモコンテナ ===== */
.demo-container {
  overflow-x: auto;
  padding: 0;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
}

/* ===== 管理画面レイアウト（デモ） ===== */
.sb-layout {
  display: flex;
  height: 500px;
  min-width: 600px;
  overflow: hidden;
}

/* ===== サイドバー ===== */
.sb-sidebar {
  --sb-width: 240px;
  --sb-collapsed-width: 64px;
  --sb-bg: #1e2433;
  --sb-text: #c9d1e0;
  --sb-hover-bg: rgba(255, 255, 255, 0.07);
  --sb-active-bg: rgba(99, 179, 237, 0.15);
  --sb-active-color: #63b3ed;
  --sb-border: rgba(255, 255, 255, 0.08);

  width: var(--sb-width);
  flex-shrink: 0;
  background: var(--sb-bg);
  color: var(--sb-text);
  display: flex;
  flex-direction: column;
  transition: width 0.25s ease;
  /* ツールチップがサイドバー枠外に出るよう overflow は visible のまま */
  overflow: visible;
  position: relative;
  z-index: 10;
}

.sb-sidebar.sb-collapsed {
  width: var(--sb-collapsed-width);
}

/* ===== サイドバーヘッダー ===== */
.sb-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 12px;
  border-bottom: 1px solid var(--sb-border);
  min-height: 54px;
  flex-shrink: 0;
  overflow: hidden;
  background: var(--sb-bg);
}

.sb-logo {
  font-size: 20px;
  flex-shrink: 0;
  width: 32px;
  text-align: center;
  line-height: 1;
}

.sb-app-name {
  font-weight: 700;
  font-size: 14px;
  color: #fff;
  white-space: nowrap;
  flex: 1;
  overflow: hidden;
  transition: opacity 0.25s ease, max-width 0.25s ease;
  max-width: 120px;
}

.sb-sidebar.sb-collapsed .sb-app-name {
  opacity: 0;
  max-width: 0;
}

.sb-toggle {
  background: none;
  border: none;
  color: var(--sb-text);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
  flex-shrink: 0;
  font-size: 11px;
  line-height: 1;
  transition: background 0.15s;
  margin-left: auto;
}

.sb-toggle:hover {
  background: var(--sb-hover-bg);
}

.sb-toggle-icon {
  display: inline-block;
  transition: transform 0.25s ease;
}

.sb-sidebar.sb-collapsed .sb-toggle-icon {
  transform: rotate(180deg);
}

/* ===== ナビゲーションリスト ===== */
.sb-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px 0;
  background: var(--sb-bg);
}

.sb-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* ===== ナビアイテム ===== */
.sb-nav-item {
  position: relative;
}

/* 親メニューボタン・単独リンク共通スタイル */
.sb-parent-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  background: none;
  border: none;
  color: var(--sb-text);
  font-size: 13px;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition: background 0.15s;
  box-sizing: border-box;
}

.sb-parent-btn:hover {
  background: var(--sb-hover-bg);
  color: #fff;
}

.sb-nav-icon {
  font-size: 17px;
  flex-shrink: 0;
  width: 32px;
  text-align: center;
  line-height: 1;
}

.sb-nav-label {
  flex: 1;
  overflow: hidden;
  transition: opacity 0.25s ease, max-width 0.25s ease;
  max-width: 140px;
}

.sb-chevron {
  font-size: 9px;
  flex-shrink: 0;
  transition: transform 0.2s ease, opacity 0.25s ease;
}

.sb-nav-item.sb-open > .sb-parent-btn .sb-chevron {
  transform: rotate(180deg);
}

/* 縮小時：ラベル・シェブロン非表示 */
.sb-sidebar.sb-collapsed .sb-nav-label {
  opacity: 0;
  max-width: 0;
}

.sb-sidebar.sb-collapsed .sb-chevron {
  opacity: 0;
  max-width: 0;
}

/* ===== 縮小時ツールチップ ===== */
.sb-sidebar.sb-collapsed .sb-parent-btn {
  position: relative;
}

.sb-sidebar.sb-collapsed .sb-parent-btn::after {
  content: attr(data-label);
  position: absolute;
  left: 60px;
  top: 50%;
  transform: translateY(-50%);
  background: #2d3748;
  color: #fff;
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 12px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 200;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.sb-sidebar.sb-collapsed .sb-parent-btn:hover::after {
  opacity: 1;
}

/* ===== 子メニュー（CSS Grid アニメーション） ===== */
.sb-children {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.25s ease;
  list-style: none;
  padding: 0;
  margin: 0;
}

.sb-nav-item.sb-open > .sb-children {
  grid-template-rows: 1fr;
}

/* min-height: 0 必須（これがないと 0fr でもコンテンツが見えてしまう） */
.sb-children-inner {
  min-height: 0;
  overflow: hidden;
}

.sb-child-link {
  display: block;
  padding: 8px 12px 8px 54px;
  color: var(--sb-text);
  text-decoration: none;
  font-size: 12.5px;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}

.sb-child-link:hover {
  background: var(--sb-hover-bg);
  color: #fff;
}

.sb-child-link.sb-active {
  background: var(--sb-active-bg);
  color: var(--sb-active-color);
}

.sb-solo-link.sb-active {
  background: var(--sb-active-bg);
  color: var(--sb-active-color);
}

/* 縮小時：子メニューを強制非表示 */
.sb-sidebar.sb-collapsed .sb-children {
  grid-template-rows: 0fr !important;
}

/* ===== メインコンテンツエリア ===== */
.sb-main {
  flex: 1;
  overflow-y: auto;
  padding: 28px 32px;
  background: #f7f9fc;
}

.sb-main h2 {
  font-size: 18px;
  color: #1a202c;
  margin-bottom: 10px;
  margin-top: 0;
}

.sb-page-desc {
  font-size: 13px;
  color: #718096;
  margin: 0 0 8px;
}

/* ===== デモコントロール（リセットボタン行） ===== */
.demo-controls {
  margin-top: 16px;
}

/* ===== リセットボタン ===== */
.reset-btn {
  padding: 6px 16px;
  font-size: 13px;
  color: #5A6A7A;
  background: #fff;
  border: 1.5px solid #D0D7E0;
  border-radius: 6px;
  cursor: pointer;
  font-family: sans-serif;
  transition: background 0.15s, border-color 0.15s;
}

.reset-btn:hover {
  background: #F4F6F9;
  border-color: #9AA5B4;
}