.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 24px;
  border-right: 1px solid var(--line);
  background: rgba(7, 12, 28, .65);
  backdrop-filter: blur(24px);
}
.brand { display: flex; gap: 12px; align-items: center; margin-bottom: 32px; }
.brand-mark {
  width: 44px; height: 44px; border-radius: 16px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 12px 28px rgba(94,234,212,.22);
  display: grid; place-items: center; color: #06121f; font-weight: 900;
}
.brand h1 { font-size: 18px; line-height: 1.1; margin: 0; }
.brand span { color: var(--muted); font-size: 12px; }
.nav { display: grid; gap: 8px; }
.nav a, .nav button {
  border: 0;
  border-radius: 16px;
  padding: 13px 14px;
  color: var(--muted);
  background: transparent;
  text-align: left;
  display: flex; align-items: center; justify-content: space-between;
  transition: .18s ease;
  text-decoration: none;
}
.nav a:hover, .nav button:hover, .nav a.active, .nav button.active { color: var(--text); background: rgba(255,255,255,.09); }
.nav small { color: rgba(255,255,255,.42); }
.sidebar-card { margin-top: 24px; padding: 16px; border: 1px solid var(--line); border-radius: 20px; background: var(--panel); }
.sidebar-card b { display: block; margin-bottom: 6px; }
.sidebar-card p { color: var(--muted); margin: 0; font-size: 13px; line-height: 1.45; }