/* すべての画面で全体メニューを左に置き、狭い画面では本文の上に収める。 */
:root {
  --site-shell-width: 1440px;
  --site-sidebar-width: 15rem;
  --site-shell-gap: 32px;
}
.site-header .container {
  width: min(var(--site-shell-width), calc(100% - 48px));
}
.site-shell.container {
  --site-shell-inset: max(24px, calc((100% - var(--site-shell-width)) / 2));
  width: 100%;
  padding-inline: var(--site-shell-inset);
}
.site-header .header-inner {
  min-height: 76px;
  gap: 16px 24px;
  padding-block: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.site-header .brand { letter-spacing: .025em; }
.site-header .important-header-link { margin-inline-start: auto; }
.site-shell {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: var(--site-sidebar-width) minmax(0, 1fr);
  align-items: start;
  gap: var(--site-shell-gap);
  background: var(--cream);
}
/* 左領域を外側の余白まで伸ばし、本文が長い場合も背景と境界を保つ。 */
.site-shell::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset-block: 0;
  inset-inline-start: 0;
  width: calc(var(--site-shell-inset) + var(--site-sidebar-width));
  border-inline-end: 1px solid var(--line);
  background: var(--paper);
  pointer-events: none;
}
.site-sidebar {
  position: sticky;
  top: 0;
  min-width: 0;
  max-height: 100vh;
  max-height: 100dvh;
  overflow-y: auto;
  scrollbar-width: thin;
  padding: 28px 8px;
  border-inline-end: 1px solid var(--line);
  background: var(--paper);
}
.site-shell-menu { min-width: 0; }
.site-shell-menu > .site-shell-toggle {
  display: flex;
  min-height: var(--ui-control-height);
  margin-bottom: 12px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--ui-radius-panel);
  background: var(--paper);
  font-weight: 700;
}
.site-shell-menu-content { min-width: 0; }
.site-navigation { display: grid; gap: 20px; min-width: 0; font-size: 1rem; }
.site-nav-list { display: grid; gap: 4px; margin: 0; padding: 0; list-style: none; }
.site-nav-list > li { min-width: 0; }
/* ナビの配置は共通にし、リンク・強調ボタンの外観から切り離す。 */
.site-nav-control {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  min-height: var(--ui-control-height);
  width: 100%;
  min-width: 0;
  padding: 10px 14px;
  text-align: start;
  white-space: normal;
  overflow-wrap: anywhere;
  line-height: 1.5;
}
.site-navigation .site-nav-link {
  border: 1px solid transparent;
  border-radius: var(--ui-radius-control);
  color: var(--ink);
  background: transparent;
  text-decoration: none;
}
.site-nav-icon { flex: none; width: 20px; height: 20px; }
.site-nav-label { min-width: 0; }
.site-nav-control .site-nav-label { flex: 1; }
.site-nav-control .badge { flex: none; margin-inline-start: auto; }
.site-navigation .site-nav-link:hover { background: var(--ui-surface-subtle); color: var(--green-dark); }
.site-navigation .site-nav-link[aria-current] {
  background: var(--ui-success-background);
  color: var(--green-dark);
  border-color: var(--ui-control-border);
  font-weight: 700;
}
.site-nav-auxiliary {
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: .9375rem;
}
.site-nav-auxiliary .site-nav-link { color: var(--ink-soft); }
.site-shell-logout { margin: 0; }
.site-authentication { display: grid; gap: 12px; }
.site-authentication [aria-current="page"] { font-weight: 700; }
.site-workspace-context {
  min-width: 0;
  margin-bottom: 16px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--ui-radius-panel);
  background: var(--paper);
}
.site-workspace-context h2 { margin: 0; font-family: inherit; font-size: 1.125rem; line-height: var(--ui-leading-card); }
.site-content { min-width: 0; padding-top: 28px; background: var(--cream); }
.site-content > .container { width: 100%; max-width: none; margin-inline: 0; }
.site-content > .page-content { min-height: calc(100vh - 200px); padding-top: 4px; padding-bottom: 64px; }
.site-content > .messages:not(:has(.message)) { display: none; }
.site-content > .messages .message:first-child { margin-top: 0; }
.site-content > .messages { margin-bottom: 20px; }

/* JSなしで狭幅から広幅へ変えても、閉じたnative detailsを開き直せる。 */
@media (min-width: 1025px) {
  .site-shell-menu[data-site-shell-ready] > .site-shell-toggle { display: none; }
}

@media (max-width: 1024px) {
  .site-shell.container { width: min(var(--site-shell-width), calc(100% - 48px)); padding-inline: 0; }
  .site-shell { grid-template-columns: minmax(0, 1fr); gap: 24px; padding-top: 20px; }
  .site-shell::before { display: none; }
  .site-sidebar { position: static; max-height: none; overflow: visible; padding: 0; border-inline-end: 0; background: transparent; }
  .site-shell-menu > .site-shell-toggle {
    margin-bottom: 0;
  }
  .site-shell-menu[open] > .site-shell-toggle { border-radius: var(--ui-radius-panel) var(--ui-radius-panel) 0 0; }
  .site-shell-menu-content {
    padding: 16px;
    border: 1px solid var(--line);
    border-top: 0;
    border-radius: 0 0 var(--ui-radius-panel) var(--ui-radius-panel);
    background: var(--paper);
  }
  .site-shell-menu:not([open]) > .site-shell-menu-content { display: none; }
  .site-content { padding-top: 0; }
  .site-content > .page-content { padding-top: 0; }
}

@media (max-width: 600px) {
  .site-header .container,
  .site-shell.container { width: calc(100% - 32px); }
  .site-header .header-inner { min-height: 68px; gap: 8px 12px; }
  .site-header .important-header-link { width: 100%; min-height: 44px; margin-inline-start: 0; }
  .site-shell { gap: 20px; padding-top: 16px; }
  .site-content > .page-content { padding-bottom: 40px; }
}

/* 会内の分類は探す対象と同じ水平ナビを使う。 */
.site-workspace-navigation { min-width: 0; }
.site-workspace-context h2 { overflow-wrap: anywhere; }

@media print {
  .site-header, .site-sidebar, .site-workspace-navigation, .site-footer, .skip-link { display: none; }
  .site-shell.container { display: block; width: 100%; padding: 0; }
  .site-shell::before { display: none; }
  .site-content { padding-top: 0; }
}