.mcio-sidebar {
  background: linear-gradient(180deg, rgba(14,18,45,.85) 0%, rgba(8,10,25,.85) 100%);
  border-right: 1px solid var(--stroke);
  padding: 1.25rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  min-height: 100vh;
}

.mcio-sidebar-brand { padding: 0.5rem 0.3rem 0.2rem; }
.mcio-brand-link { display: flex; align-items: center; gap: 0.7rem; color: var(--text); }
.mcio-brand-mark {
  width: 44px; height: 44px;
  display: inline-grid; place-items: center;
  border-radius: 12px;
  background: rgba(123,92,255,.08);
  border: 1px solid var(--stroke);
  overflow: hidden;
}
.mcio-brand-text { font-weight: 800; letter-spacing: .02em; font-size: 1.05rem; background: var(--grad); -webkit-background-clip: text; color: transparent; }

.mcio-nav { display: flex; flex-direction: column; gap: 0.25rem; margin-top: 0.4rem; }
.mcio-nav-item {
  display: flex; align-items: center; gap: 0.7rem;
  padding: 0.7rem 0.9rem;
  border-radius: 10px;
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.mcio-nav-item:hover { color: var(--text); background: rgba(123,92,255,.08); }
.mcio-nav-item.is-active {
  color: #fff;
  background: linear-gradient(90deg, rgba(123,92,255,.22), rgba(43,225,255,.06));
  border-color: rgba(123,92,255,.45);
}
.mcio-ico { width: 20px; height: 20px; flex: 0 0 20px; }
.mcio-nav-divider { height: 1px; background: var(--stroke); margin: 0.6rem 0.3rem; }
.mcio-nav-logout { color: #ff8aa3; }
.mcio-nav-logout:hover { color: #ffbecb; background: rgba(255,91,127,.08); }