/* Phase 3 desktop shell. Existing controls and BodyGraph DOM remain untouched. */
html[data-humdesign-shell="phase3"] {
  --humdesign-top-nav: 72px;
  --humdesign-sub-nav: 46px;
}

#humdesign-app-shell {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  background: var(--hd-surface);
  border-bottom: 1px solid var(--hd-border);
  box-shadow: 0 1px 0 rgb(24 20 14 / 3%);
  color: var(--hd-text);
  font-family: var(--hd-font);
}

.humdesign-top-nav,
.humdesign-secondary-nav {
  display: flex;
  align-items: center;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 32px;
}

.humdesign-top-nav { height: var(--humdesign-top-nav); gap: 32px; }
.humdesign-wordmark { min-height: auto; padding: 0; border: 0; background: transparent; color: var(--hd-text); font-size: 17px; letter-spacing: .08em; }
.humdesign-wordmark:hover { background: transparent; color: var(--hd-text); }
.humdesign-primary-nav { display: flex; align-items: center; gap: 22px; color: var(--hd-text-2); font-size: 14px; }
.humdesign-primary-nav span, .humdesign-secondary-nav span { white-space: nowrap; }
.humdesign-primary-nav .is-active { color: var(--hd-text); font-weight: 600; }
.humdesign-nav-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.humdesign-nav-actions button { min-height: 36px; padding: 0 12px; border: 1px solid var(--hd-border); background: var(--hd-surface); color: var(--hd-text-2); font-size: 13px; font-weight: 500; }
.humdesign-nav-actions button:hover { background: var(--hd-surface-soft); border-color: var(--hd-border-strong); color: var(--hd-text); }
.humdesign-secondary-nav { height: var(--humdesign-sub-nav); gap: 24px; border-top: 1px solid var(--hd-border); color: var(--hd-text-3); font-size: 13px; }
.humdesign-secondary-nav .is-active { color: var(--hd-text); font-weight: 600; }

html[data-humdesign-shell="phase3"] .center-pane {
  top: calc(var(--humdesign-top-nav) + var(--humdesign-sub-nav)) !important;
  left: 0 !important;
  width: 100vw !important;
  height: calc(100vh - var(--humdesign-top-nav) - var(--humdesign-sub-nav)) !important;
  min-height: 680px;
  overflow-y: auto;
}
html[data-humdesign-shell="phase3"] .page0 { width: 100% !important; }
html[data-humdesign-shell="phase3"] .transit { width: min(760px, 70vw) !important; margin-inline: auto; }

html[data-humdesign-shell="phase3"] .left-bar,
html[data-humdesign-shell="phase3"] .right-bar {
  position: fixed !important;
  top: var(--humdesign-top-nav) !important;
  bottom: 0 !important;
  z-index: 1001 !important;
  width: min(360px, calc(100vw - 28px)) !important;
  height: auto !important;
  box-shadow: var(--hd-shadow-floating) !important;
  transition: transform var(--hd-slow) var(--hd-ease) !important;
}
html[data-humdesign-shell="phase3"] .left-bar { left: 0 !important; transform: translateX(-104%); }
html[data-humdesign-shell="phase3"] .right-bar { right: 0 !important; left: auto !important; transform: translateX(104%); }
html[data-humdesign-shell="phase3"] body[data-humdesign-left-open="true"] .left-bar { transform: translateX(0); }
html[data-humdesign-shell="phase3"] body[data-humdesign-right-open="true"] .right-bar { transform: translateX(0); }

/* The native icon rail is retained as a compact contextual tool strip. */
html[data-humdesign-shell="phase3"] .humdesign-toolbar-control,
html[data-humdesign-shell="phase3"] .bar-toggle { z-index: 1002; }

@media (max-width: 1050px) {
  #humdesign-app-shell { display: none; }
  html[data-humdesign-shell="phase3"] .center-pane { top: 0 !important; height: 100vh !important; min-height: 0; }
}