.sidebar-layout-demo-pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 20px 0 24px;
}

.sidebar-layout-demo-box {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.sidebar-layout-demo-label {
  margin: 0;
  padding: 10px 14px;
  font-size: 0.8rem;
  font-weight: 700;
}

.sidebar-layout-demo-box--bad .sidebar-layout-demo-label {
  color: #b91c1c;
  background: #fef2f2;
  border-bottom: 1px solid #fecaca;
}

.sidebar-layout-demo-box--good .sidebar-layout-demo-label {
  color: #166534;
  background: #f0fdf4;
  border-bottom: 1px solid #bbf7d0;
}

.sidebar-layout-demo-note {
  margin: 0;
  padding: 12px 14px;
  color: var(--color-text-secondary);
  font-size: 0.82rem;
  background: #f8f9fb;
}

.sidebar-layout-demo-stage {
  padding: 14px;
  background: #eef2f6;
}

.sidebar-layout-demo {
  height: 360px;
  color: #253047;
  background: #fff;
  border: 1px solid #cbd5e1;
  border-radius: 7px;
  box-shadow: 0 8px 20px rgb(15 23 42 / 8%);
}

.sidebar-layout-demo__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 50px;
  padding: 0 16px;
  color: #fff;
  background: #24324a;
}

.sidebar-layout-demo__header .sidebar-layout-demo__brand {
  margin: 0;
  color: #fff;
  font-size: 0.88rem;
  font-weight: 700;
}

.sidebar-layout-demo__user {
  margin: 0;
  font-size: 0.75rem;
  color: #dbe5f5;
}

.sidebar-layout-demo__body {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
}

.sidebar-layout-demo__sidebar {
  padding: 12px;
  color: #334155;
  background: #f8fafc;
  border-right: 1px solid #dbe2ea;
}

.sidebar-layout-demo__sidebar-title {
  margin: 0 0 8px;
  color: #64748b;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.sidebar-layout-demo__nav {
  display: grid;
  gap: 5px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.sidebar-layout-demo__nav a {
  display: block;
  padding: 7px 9px;
  color: #475569;
  font-size: 0.76rem;
  text-decoration: none;
  border-radius: 5px;
}

.sidebar-layout-demo__nav a[aria-current="page"] {
  color: #1d4ed8;
  font-weight: 700;
  background: #dbeafe;
}

.sidebar-layout-demo__main {
  padding: 14px;
  background: #fff;
}

.sidebar-layout-demo__main h3 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.sidebar-layout-demo__cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  margin-bottom: 12px;
}

.sidebar-layout-demo__card {
  min-height: 68px;
  padding: 10px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
}

.sidebar-layout-demo__card span {
  display: block;
  color: #64748b;
  font-size: 0.68rem;
}

.sidebar-layout-demo__card strong {
  display: block;
  margin-top: 5px;
  font-size: 1rem;
}

.sidebar-layout-demo__table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.72rem;
}

.sidebar-layout-demo__table th,
.sidebar-layout-demo__table td {
  padding: 8px;
  text-align: left;
  border-bottom: 1px solid #e2e8f0;
}

.sidebar-layout-demo__table th {
  color: #475569;
  background: #f8fafc;
}

/* 失敗版: headerの下へheight:100%を足し、外枠と本文の両方をスクロールさせている */
.sidebar-layout-demo--bad {
  overflow-y: auto;
}

.sidebar-layout-demo--bad .sidebar-layout-demo__body {
  height: 100%;
  min-height: 0;
  grid-template-rows: 100%;
}

.sidebar-layout-demo--bad .sidebar-layout-demo__main {
  height: 100%;
  box-sizing: border-box;
  overflow-y: auto;
}

/* 修正版: 外枠の高さを確定し、残りの1行だけを0まで縮められるようにする */
.sidebar-layout-demo--good {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  overflow: hidden;
}

.sidebar-layout-demo--good .sidebar-layout-demo__body {
  min-height: 0;
}

.sidebar-layout-demo--good .sidebar-layout-demo__sidebar,
.sidebar-layout-demo--good .sidebar-layout-demo__main {
  min-height: 0;
  overflow-y: auto;
}

.sidebar-layout-check-table {
  width: 100%;
  margin: 16px 0 22px;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.sidebar-layout-check-table th,
.sidebar-layout-check-table td {
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  border: 1px solid var(--color-border);
}

.sidebar-layout-check-table th {
  background: #f8f9fb;
}

@media (max-width: 640px) {
  .sidebar-layout-demo {
    height: auto;
  }

  .sidebar-layout-demo__body,
  .sidebar-layout-demo--bad .sidebar-layout-demo__body {
    display: block;
    height: auto;
  }

  .sidebar-layout-demo__sidebar {
    border-right: 0;
    border-bottom: 1px solid #dbe2ea;
  }

  .sidebar-layout-demo__nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sidebar-layout-demo--bad,
  .sidebar-layout-demo--bad .sidebar-layout-demo__main,
  .sidebar-layout-demo--good .sidebar-layout-demo__sidebar,
  .sidebar-layout-demo--good .sidebar-layout-demo__main {
    overflow: visible;
  }

  .sidebar-layout-demo__cards {
    grid-template-columns: 1fr;
  }

  .sidebar-layout-demo__table th:nth-child(3),
  .sidebar-layout-demo__table td:nth-child(3) {
    display: none;
  }

  .sidebar-layout-check-table {
    font-size: 0.82rem;
  }
}