.shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-areas: "sidebar topbar" "sidebar content";
  min-height: 100vh;
}

/* ---------- Sidebar ---------- */
.sidebar {
  grid-area: sidebar;
  background: var(--sidebar-bg);
  color: var(--ink-on-dark);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.sidebar__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--sidebar-border);
}
.sidebar__brand-mark {
  width: 28px; height: 28px; border-radius: 7px;
  background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 700; font-size: 12px; color: #fff;
  flex-shrink: 0;
}
.sidebar__brand-text { line-height: 1.2; }
.sidebar__brand-text strong { display: block; font-size: 13px; color: #fff; }
.sidebar__brand-text span { font-size: 11px; color: var(--ink-on-dark-soft); font-family: var(--font-mono); }

.sidebar__nav { flex: 1; padding: 10px 8px; }
.nav-group { margin-bottom: 4px; }
.nav-group__label {
  font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--ink-on-dark-soft); padding: 14px 10px 6px;
}
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-radius: var(--radius-sm);
  color: var(--ink-on-dark); font-size: 13.5px;
  cursor: pointer; position: relative;
}
.nav-item:hover { background: rgba(255,255,255,0.06); text-decoration: none; }
.nav-item.is-active { background: var(--sidebar-bg-active); color: #fff; }
.nav-item.is-active::before {
  content: ""; position: absolute; left: -8px; top: 4px; bottom: 4px; width: 3px;
  background: var(--accent); border-radius: 2px;
}
.nav-item__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--ink-on-dark-soft); flex-shrink: 0; }
.nav-item__badge {
  margin-left: auto; font-size: 10.5px; font-family: var(--font-mono);
  background: var(--accent); color: #fff; border-radius: 10px; padding: 1px 6px;
}
.nav-item--stub { opacity: 0.55; }
.nav-item--stub::after {
  content: "pronto"; margin-left: auto; font-size: 9.5px; text-transform: uppercase;
  letter-spacing: 0.04em; color: var(--ink-on-dark-soft); border: 1px solid var(--sidebar-border);
  border-radius: 8px; padding: 1px 6px;
}

.sidebar__footer {
  border-top: 1px solid var(--sidebar-border);
  padding: 12px 14px;
  font-size: 11.5px;
  color: var(--ink-on-dark-soft);
}

/* ---------- Topbar ---------- */
.topbar {
  grid-area: topbar;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px;
  position: sticky; top: 0; z-index: 20;
}
.topbar__crumb { font-size: 13px; color: var(--ink-soft); }
.topbar__crumb strong { color: var(--ink); font-weight: 600; }
.topbar__actions { display: flex; align-items: center; gap: 14px; }

.user-chip {
  display: flex; align-items: center; gap: 8px; cursor: pointer;
  padding: 5px 8px; border-radius: var(--radius-sm);
}
.user-chip:hover { background: var(--surface-sunken); }
.user-chip__avatar {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent-ink);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700;
}
.user-chip__name { font-size: 13px; color: var(--ink); }

/* ---------- Content ---------- */
.content {
  grid-area: content;
  padding: 22px 26px 60px;
  max-width: 1180px;
  width: 100%;
}
.page-header {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 18px; gap: 12px; flex-wrap: wrap;
}
.page-header p { color: var(--ink-soft); margin: 0; }

@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; grid-template-areas: "topbar" "content"; }
  .sidebar { position: fixed; left: -100%; width: 82vw; height: 100vh; z-index: 40; transition: left 0.18s ease; }
  .sidebar.is-open { left: 0; box-shadow: var(--shadow-pop); }
  .content { padding: 16px; }
}