.sidebar-brand {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px;
  margin-bottom: 24px;
}

.sidebar-brand__title {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.sidebar-brand__tag {
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-group {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--surface);
}

.sidebar-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.sidebar-summary-icon svg {
  width: 18px;
  height: 18px;
  fill: var(--muted);
}

.sidebar-summary-text {
  flex: 1;
  margin-left: 10px;
}

.summary-arrow {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 1px solid var(--border);
  position: relative;
}

.summary-arrow::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-bottom: 2px solid var(--text);
  border-right: 2px solid var(--text);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

.sidebar-group[open] .summary-arrow::after {
  transform: rotate(225deg);
}

.sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0 0 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-link {
  display: block;
  padding: 6px 24px;
  font-size: 13px;
  color: var(--muted);
  transition: color 0.2s ease, background 0.2s ease;
}

.sidebar-link:hover {
  background: var(--panel-soft);
  color: #fff;
}

.sidebar-link.is-current {
  color: var(--accent);
  font-weight: 600;
}