aside.panel {
  border-left: 1px solid var(--line);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  min-height: 0;
  position: relative;
}

.panel-handle { display: none; }

@media (max-width: 980px) {
  aside.panel {
    border-left: 0;
    border-top: 1px solid var(--line);
    height: 50dvh;
    max-height: 50dvh;
    border-top-left-radius: var(--radius-xl);
    border-top-right-radius: var(--radius-xl);
    box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.45);
  }
  .panel-handle {
    display: block;
    width: 44px;
    height: 5px;
    background: var(--line-2);
    border-radius: 99px;
    margin: 10px auto 0;
    flex-shrink: 0;
  }
}

.tabs {
  display: flex;
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
  position: sticky;
  top: 0;
  z-index: 2;
  padding: 6px;
  gap: 4px;
}
.tab {
  flex: 1;
  padding: 11px 8px;
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--ink-dim);
  text-align: center;
  border-radius: var(--radius);
  transition: all .15s ease;
  min-height: 42px;
}
.tab:hover { color: var(--accent); background: rgba(255,111,168,.08); }
.tab.active {
  color: #1a0a14;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), #ff8eb9);
  box-shadow: 0 3px 10px rgba(255,111,168,.3);
}
.tab .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 6px;
  padding: 1px 7px;
  background: rgba(0,0,0,0.25);
  color: inherit;
  border-radius: var(--radius-pill);
  font-size: 10px;
  min-width: 20px;
  font-weight: 800;
}
.tab:not(.active) .num {
  background: rgba(255,111,168,.12);
  color: var(--accent);
}

@media (max-width: 640px) {
  .tab { padding: 11px 6px; font-size: 12px; }
}

.pane {
  display: none;
  flex: 1;
  overflow: auto;
  padding: 16px;
  padding-bottom: max(16px, env(safe-area-inset-bottom));
  flex-direction: column;
  gap: 16px;
  -webkit-overflow-scrolling: touch;
}
.pane.active { display: flex; }

@media (max-width: 640px) { .pane { padding: 14px; gap: 14px; } }

.region-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 220px;
  overflow: auto;
}
.region-list .empty-state {
  color: var(--ink-mute);
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  text-align: center;
  padding: 18px 0;
}
.region-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all .15s ease;
  min-height: 44px;
}
.region-item:hover {
  border-color: var(--line-3);
  background: var(--panel-2);
  transform: translateX(2px);
}
.region-item.active {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(255,111,168,.12), var(--panel-2));
  box-shadow: var(--shadow-sm);
}
.region-item .idx {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 800;
  color: var(--accent);
  width: 32px;
  flex-shrink: 0;
}
.region-item .meta {
  flex: 1;
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink-dim);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.region-item .type {
  font-family: var(--sans);
  font-size: 10.5px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: .02em;
  padding: 3px 9px;
  background: rgba(255,111,168,.12);
  border-radius: var(--radius-pill);
  flex-shrink: 0;
  white-space: nowrap;
}
.region-item .x {
  color: var(--ink-mute);
  padding: 6px 8px;
  border-radius: var(--radius-xs);
  min-width: 32px;
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}
.region-item .x:hover { color: var(--danger); background: rgba(255,118,118,.1); }