/* Page chrome — header, shell, sidebar, responsive grid */
.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.brand-bar,
.nav-bar,
.page-shell {
  width: var(--page-width);
  margin-inline: auto;
}

.brand-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.35rem 0 1.1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--ink);
}

.brand:hover { color: var(--ink); }

.brand-mark {
  width: 2.1rem;
  height: 2.1rem;
  flex: 0 0 auto;
  display: block;
}

.brand-word {
  font-family: var(--sans);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1.35rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--line);
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.nav-bar a {
  color: var(--ink);
  text-decoration: none;
}

.nav-bar a:hover,
.nav-bar a.is-active {
  color: var(--sage-deep);
}

.nav-form {
  margin: 0;
}

.nav-user {
  color: var(--sage-deep);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: none;
}

.nav-action {
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-weight: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  padding: 0;
  cursor: pointer;
}

.nav-action:hover {
  background: transparent;
  border-color: transparent;
  color: var(--sage-deep);
}

.page-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(220px, 0.75fr);
  gap: 0;
  margin-top: 2rem;
  margin-bottom: 3rem;
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.page-shell.single {
  grid-template-columns: 1fr;
}

.content {
  padding: 2rem 2.1rem 2.5rem;
  min-width: 0;
}

.sidebar {
  padding: 2rem 1.5rem 2.5rem;
  border-left: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(178, 194, 194, 0.18), transparent 36%),
    var(--paper);
}

.sidebar-mark {
  width: 4.5rem;
  height: 4.5rem;
  margin-bottom: 1.25rem;
}

.sidebar h2 {
  margin: 0 0 0.65rem;
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.sidebar p {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.sidebar-list {
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 0;
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sidebar-list li {
  border-top: 1px solid var(--line);
}

.sidebar-list a {
  display: block;
  padding: 0.7rem 0;
  color: var(--ink);
  text-decoration: none;
}

.sidebar-list a:hover { color: var(--sage-deep); }

.sidebar-footnote {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

@media (max-width: 860px) {
  .page-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .brand-bar,
  .nav-bar,
  .page-shell {
    width: var(--page-width-narrow);
  }

  .content {
    padding: 1.5rem 1.25rem 2rem;
  }

  .nav-bar {
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 0.85rem 1.1rem;
  }
}