/* Sky Castle Hub application shell: environment band, sidebar, top bar, content area. */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 100vh;
}
html[data-sidebar="collapsed"] .app { grid-template-columns: var(--sidebar-width-collapsed) minmax(0, 1fr); }

/* ---- sidebar */
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-sidebar);
  color: var(--color-sidebar-text);
  overflow-y: auto;
}
.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: var(--topbar-height);
  justify-content: center;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--color-sidebar-text-strong);
}
.brand:hover { text-decoration: none; color: var(--color-sidebar-text-strong); }
/* TODO: replace this text wordmark with the official Sky Castle logo asset once it is supplied. */
.brand__name { font-weight: 700; font-size: var(--text-base); letter-spacing: 0.01em; }
.brand__name--short { display: none; }
.brand__sub { font-size: var(--text-xs); color: var(--color-sidebar-text); }
.brand__rule { display: block; width: 1.5rem; height: 2px; background: var(--color-accent); margin-bottom: 4px; }

.nav { padding: var(--space-3) var(--space-2); display: flex; flex-direction: column; gap: var(--space-4); flex: 1; }
.nav__group-label {
  padding: 0 var(--space-3);
  margin-bottom: var(--space-1);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-sidebar-text);
  opacity: 0.7;
}
.nav__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.45rem var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-sidebar-text);
  font-size: var(--text-sm);
  text-decoration: none;
}
a.nav__item:hover { background: var(--color-sidebar-hover); color: var(--color-sidebar-text-strong); text-decoration: none; }
.nav__item[aria-current="page"] { background: var(--color-sidebar-active); color: var(--color-sidebar-text-strong); font-weight: 600; }
.nav__item[aria-disabled="true"] { opacity: 0.5; cursor: default; }
.nav__icon { flex: none; width: 1.1rem; height: 1.1rem; }
.nav__soon { margin-left: auto; font-size: 0.6875rem; opacity: 0.8; }

.sidebar__foot { padding: var(--space-2); border-top: 1px solid rgba(255, 255, 255, 0.08); }
.sidebar-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: 0.45rem var(--space-3);
  background: none;
  border: 0;
  border-radius: var(--radius-md);
  color: var(--color-sidebar-text);
  font-size: var(--text-sm);
  cursor: pointer;
}
.sidebar-toggle:hover { background: var(--color-sidebar-hover); color: var(--color-sidebar-text-strong); }

html[data-sidebar="collapsed"] .brand__sub,
html[data-sidebar="collapsed"] .nav__label,
html[data-sidebar="collapsed"] .nav__soon,
html[data-sidebar="collapsed"] .nav__group-label,
html[data-sidebar="collapsed"] .sidebar-toggle__label { display: none; }
html[data-sidebar="collapsed"] .brand { align-items: center; padding-inline: var(--space-2); }
html[data-sidebar="collapsed"] .brand__name--full { display: none; }
html[data-sidebar="collapsed"] .brand__name--short { display: block; }
html[data-sidebar="collapsed"] .nav__item,
html[data-sidebar="collapsed"] .sidebar-toggle { justify-content: center; padding-inline: 0; }
html[data-sidebar="collapsed"] .sidebar-toggle svg { transform: scaleX(-1); }

/* ---- main column */
.app__main { display: flex; flex-direction: column; min-width: 0; }

.env-band {
  padding: 0.2rem var(--space-4);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-align: center;
}
.env-band--local { background: var(--color-info-soft); color: var(--color-info); }
.env-band--staging { background: var(--color-warning-soft); color: var(--color-warning); }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-height: var(--topbar-height);
  padding: 0 var(--space-5);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.topbar__reserved { flex: 1; } /* held for global search, My Work, notifications and the signed-in user (not built; see docs/phase-i-ui.md) */
.topbar__group { display: flex; align-items: center; gap: var(--space-3); }

.content {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-5);
}

/* Workbench pages (data grids such as Transactions) use the whole workspace; summary pages (Overview, Reconciliation) keep a readable measure. */
.content--wide { max-width: none; padding-inline: var(--space-4); }

/* Narrow windows always use the compact sidebar. */
@media (max-width: 900px) {
  .app { grid-template-columns: var(--sidebar-width-collapsed) minmax(0, 1fr); }
  .brand__sub, .nav__label, .nav__soon, .nav__group-label, .sidebar-toggle { display: none; }
  .brand { align-items: center; padding-inline: var(--space-2); }
  .brand__name--full { display: none; }
  .brand__name--short { display: block; }
  .nav__item { justify-content: center; padding-inline: 0; }
  .content { padding: var(--space-4); }
  .topbar { padding: 0 var(--space-4); }
}