/* 🐕🦌💕 聊天室 — 侧边栏 */

.sidebar {
  width: 260px; min-width: 260px;
  background: rgba(250,246,240,0.95);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  transition: margin-left 0.3s ease, opacity 0.3s ease, transform 0.3s ease;
  z-index: 50;
}
.sidebar.collapsed {
  margin-left: -260px; opacity: 0; pointer-events: none;
}
.sidebar-header {
  padding: 14px 16px 10px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border);
}
.sidebar-header-title { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.sidebar-btn {
  background: none; border: 1px solid var(--border);
  border-radius: 8px; padding: 4px 10px; cursor: pointer;
  font-size: 13px; color: var(--text-secondary);
  transition: all 0.2s;
}
.sidebar-btn:hover { background: var(--bg-secondary); }
.session-list {
  flex: 1; overflow-y: auto; padding: 8px;
}
.session-list::-webkit-scrollbar { width: 4px; }
.session-list::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }
.session-item {
  padding: 10px 12px; border-radius: 10px; cursor: pointer;
  margin-bottom: 10px; transition: background 0.15s;
  position: relative;
}
.session-item:hover { background: rgba(180,160,130,0.1); }
.session-item.active { background: rgba(196,180,154,0.2); }
.session-item-title {
  font-size: 13px; font-weight: 500; color: var(--text-primary);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.session-item-meta {
  font-size: 11px; color: var(--text-muted); margin-top: 3px;
  display: flex; gap: 8px;
}
.session-item-preview {
  font-size: 11px; color: var(--text-secondary); margin-top: 2px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.session-item-actions {
  position: absolute; right: 8px; top: 8px;
  display: none; gap: 4px;
}
.session-item:hover .session-item-actions { display: flex; }
.session-item-actions button {
  background: none; border: none; cursor: pointer; font-size: 12px;
  padding: 2px 4px; border-radius: 4px; opacity: 0.5;
}
.session-item-actions button:hover { opacity: 1; background: rgba(0,0,0,0.05); }
.sidebar-toggle {
  background: none; border: none; cursor: pointer;
  font-size: 18px; padding: 4px 8px; flex-shrink: 0;
  color: var(--text-secondary); transition: opacity 0.2s;
  z-index: 60;
}
.sidebar-toggle:hover { opacity: 0.6; }

@media (max-width: 768px) {
  .sidebar {
    position: fixed; left: 0; top: 0; bottom: 0;
    z-index: 50;
    box-shadow: 4px 0 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, opacity 0.3s ease;
  }
  .sidebar.collapsed { transform: translateX(-100%); margin-left: 0; }
}

/* 📷 Wakeup target button */
.wakeup-btn {
  opacity: 0.3;
  transition: opacity 0.2s;
}
.session-item:hover .wakeup-btn,
.wakeup-btn.active {
  opacity: 1;
}
.wakeup-btn.active {
  filter: drop-shadow(0 0 3px var(--accent));
}