/* App shell: sidebar + content. Replaces the old navbar layout. */

.app-shell { display: flex; min-height: 100vh; align-items: stretch; }

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--sb-bg);
  border-right: 1px solid var(--sb-border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  transition: width 0.15s ease;
}
.sidebar.is-collapsed { width: var(--sidebar-w-collapsed); }

.sidebar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 0.9rem 0.6rem;
  flex-shrink: 0;
}
.sidebar.is-collapsed .sidebar-top {
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.9rem 0 0.6rem;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  overflow: hidden;
  white-space: nowrap;
}
.sidebar-brand-mark {
  width: 22px; height: 22px; flex-shrink: 0;
  border-radius: 6px;
  background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 0.75rem; font-weight: 800;
}
.sidebar.is-collapsed .sidebar-brand-label { display: none; }

.sidebar-toggle {
  background: transparent;
  border: 1px solid var(--sb-border);
  color: var(--sb-text-dim);
  width: 24px; height: 24px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}
.sidebar-toggle:hover { background: var(--sb-bg-hover); color: var(--sb-text-active); }
.sidebar-toggle svg { transition: transform 0.15s ease; }
.sidebar.is-collapsed .sidebar-toggle svg { transform: rotate(180deg); }

.sidebar-search { padding: 0 0.7rem 0.6rem; flex-shrink: 0; }
.sidebar-search input {
  width: 100%;
  background: var(--sb-bg-hover);
  border: 1px solid var(--sb-border);
  color: var(--sb-text);
  border-radius: var(--radius);
  padding: 0.4rem 0.55rem;
  font-size: 0.78rem;
}
.sidebar-search input::placeholder { color: var(--sb-text-dim); }
.sidebar-search input:focus { outline: none; border-color: var(--accent); }
.sidebar.is-collapsed .sidebar-search { display: none; }

.sidebar-nav { flex: 1; padding: 0.3rem 0.5rem; display: flex; flex-direction: column; gap: 0.1rem; }
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.5rem 0.6rem;
  border-radius: var(--radius);
  color: var(--sb-text);
  font-size: 0.83rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
}
.sidebar-nav a:hover { background: var(--sb-bg-hover); color: var(--sb-text-active); }
.sidebar-nav a.is-active { background: var(--sb-bg-active); color: var(--sb-text-active); }
.sidebar-nav a svg { flex-shrink: 0; width: 17px; height: 17px; opacity: 0.9; }
.sidebar-nav a .nav-label { overflow: hidden; text-overflow: ellipsis; }
.sidebar-nav a .nav-badge {
  margin-left: auto;
  background: var(--accent);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  padding: 0.05rem 0.4rem;
  flex-shrink: 0;
}
.sidebar.is-collapsed .sidebar-nav a .nav-label,
.sidebar.is-collapsed .sidebar-nav a .nav-badge { display: none; }
.sidebar.is-collapsed .sidebar-nav a { justify-content: center; }

.sidebar-divider { height: 1px; background: var(--sb-border); margin: 0.5rem 0.7rem; flex-shrink: 0; }

.sidebar-footer {
  flex-shrink: 0;
  padding: 0.7rem;
  border-top: 1px solid var(--sb-border);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.sidebar-user {
  font-size: 0.72rem;
  color: var(--sb-text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sidebar.is-collapsed .sidebar-user { display: none; }
.sidebar-footer form { margin: 0; }
.sidebar-footer .btn {
  width: 100%;
  background: transparent;
  border-color: var(--sb-border);
  color: var(--sb-text);
  font-size: 0.75rem;
}
.sidebar-footer .btn svg { width: 14px; height: 14px; flex-shrink: 0; }
.sidebar-footer .btn:hover { background: var(--sb-bg-hover); }
.sidebar.is-collapsed .sidebar-footer .btn span { display: none; }

.app-content {
  flex: 1;
  min-width: 0;
  padding: 1.35rem 1.75rem;
}

@media (max-width: 860px) {
  .sidebar { position: fixed; z-index: 40; }
  .app-content { padding: 1rem; margin-left: var(--sidebar-w-collapsed); }
}