.shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  padding-bottom: 32px; /* reserve space for the fixed SecurityFooter bar */
}

.header {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 28px;
  height: 56px;
  background: #ffffff;
  border-bottom: 2px solid #1e4fa8;
  box-shadow: 0 2px 8px rgba(30,79,168,.10);
  flex-shrink: 0;
  z-index: 10;
}

.logo {
  height: 44px;
  width: auto;
  display: block;
  object-fit: contain;
  flex-shrink: 0;
}

.nav { display: flex; gap: 4px; margin-left: auto; align-items: center; }

.nav button {
  background: transparent;
  color: #64748b;
  padding: 7px 20px;
  font-size: .9rem;
  font-weight: 500;
  border-radius: 6px;
}
.nav button:hover { color: #1e4fa8; background: #eff4ff; }
.nav button.active { color: #1e4fa8; background: #dce8ff; font-weight: 700; }

.langToggle {
  display: flex;
  gap: 2px;
  margin-left: 8px;
  padding-left: 12px;
  border-left: 1px solid #e2e8f0;
}
.langToggle button {
  background: transparent;
  color: #94a3b8;
  padding: 5px 9px;
  font-size: .78rem;
  font-weight: 700;
  border-radius: 4px;
  letter-spacing: .04em;
}
.langToggle button:hover { color: #1e4fa8; background: #eff4ff; }
.langToggle button.active { color: #1e4fa8; background: #dce8ff; }

/* ── Body: sidebar + main ── */
.body {
  flex: 1;
  display: flex;
  overflow: hidden;
}

.main {
  flex: 1;
  overflow: hidden;
  padding: 20px 28px;
  display: flex;
  flex-direction: column;
}

.mainScrollable {
  flex: 1;
  overflow-y: auto;
  padding: 20px 28px;
}