/* ---------- app shell (dashboard layout) ---------- */

.app { display: flex; min-height: 100vh; }

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  width: var(--nav-width);
  flex-shrink: 0;
  /* The nav is a fixed 100vh box; without this, a short window silently clips
     the bottom items (the footer back-link first) with no way to reach them. */
  overflow-y: auto;
  padding: 16px;
  background: var(--bg-paper);
  border-right: 1px dashed var(--border-sidebar);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 8px 24px;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  color: var(--logo-ink);
}

.nav-subheader {
  padding: 8px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-disabled);
}

.nav { display: flex; flex-direction: column; gap: 4px; }

/* nav-section/css-vars.ts: item height 44, radius 8, active = primary on
   rgba(primary, .08), hover .16 */
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 12px;
  border-radius: var(--radius-btn);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 120ms ease;
}

.nav-item:hover { background: rgba(145, 158, 171, 0.08); }

.nav-item.active {
  color: var(--primary);
  font-weight: 600;
  background: rgba(0, 167, 111, 0.08);
}

.nav-item.active:hover { background: rgba(0, 167, 111, 0.16); }

.nav-icon { display: inline-flex; width: 24px; height: 24px; }

/* nav sub-menus (collapsible <details> groups) */
.nav-text { flex: 1; }

.nav-badge {
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 700;
  color: var(--error-darker);
  background: rgba(255, 86, 48, 0.16);
}

[data-theme="dark"] .nav-badge { color: var(--error-lighter); }

.nav-dot {
  width: 24px;
  display: inline-flex;
  justify-content: center;
}

.nav-dot::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.48;
}

.nav-group { position: relative; }

.nav-group > summary {
  list-style: none;
  cursor: pointer;
}

.nav-group > summary::-webkit-details-marker { display: none; }

.nav-caret {
  display: inline-flex;
  transition: transform 150ms ease;
  color: var(--text-disabled);
}

.nav-group[open] > summary > .nav-caret { transform: rotate(90deg); }

.nav-children {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 4px 0 4px 16px;
  padding-left: 12px;
  border-left: 1px solid rgba(145, 158, 171, 0.2);
}

.nav-children .nav-item { height: 36px; }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  background: var(--bg-header);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.header-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
}

.header-actions { display: flex; align-items: center; gap: 16px; }

.header-user { color: var(--text-secondary); font-size: 13px; }

.content { padding: 8px 40px 64px; }

.page-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 24px 0 40px;
}