.sidebar {
  width: 100%;
  height: 100%;

  display: flex;
  flex-direction: column;
  align-items: stretch;

  padding: 22px 14px;

  /* 🔥 Keep brand blue, add depth */
  background: linear-gradient(
    180deg,
    #1976d2 0%,
    #1669bb 60%,
    #145ca4 100%
  );

  /* subtle premium edge */
  box-shadow: inset -1px 0 0 rgba(255,255,255,0.08);

  margin: 0;
}

.sidebar-item {
  width: 100%;
  padding: 13px 16px;
  margin-bottom: 8px;

  display: block;
  text-decoration: none;

  color: rgba(255,255,255,0.72);

  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.2px;

  border-radius: 8px;

  transition: all 0.18s ease;
}

.sidebar-item:hover {
  background: rgba(255,255,255,0.10);
  color: #ffffff;

  transform: translateX(2px);
}

.sidebar-item.active {
  position: relative;

  background: rgba(0,0,0,0.18);
  color: #ffffff;

  /* depth */
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.sidebar-item.active::before {
  content: "";

  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;

  width: 3px;
  border-radius: 2px;

  background: #ffffff;
  opacity: 0.9;
}