.sidebar {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  height: 100dvh;
  min-height: 0;
  overflow: hidden;
  padding: 18px;
  border-right: 1px solid var(--line);
  background: var(--panel);
}
.sidebar::before, .sidebar::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  z-index: 4;
  height: 18px;
  pointer-events: none;
  opacity: 0;
  transition: opacity .12s ease;
}
.sidebar::before {
  top: var(--chat-list-top, 0);
  background: linear-gradient(to bottom, rgba(0,0,0,.14), transparent 72%);
}
.sidebar::after {
  top: calc(var(--chat-list-bottom, 100%) - 18px);
  background: linear-gradient(to top, rgba(0,0,0,.14), transparent 72%);
}
.sidebar.sidebar-shadow-top::before, .sidebar.sidebar-shadow-bottom::after { opacity: 1; }

.brand { display: grid; gap: 10px; border-bottom: 2px solid var(--text); padding-bottom: 14px; }
.brand-mark { display: block; width: 100%; height: auto; user-select: none; -webkit-user-drag: none; }
.brand p { margin: 0; color: var(--muted); font-size: 14px; }
.brand-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.brand-search-group { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.prompts-chat { text-decoration: none; }
.prompts-chat svg { width: 20px; height: 20px; }

.new-chat, .settings-button, .icon-button, .keep-button, .special-button {
  border: 1px solid var(--line);
  background: var(--panel-2);
  border-radius: 999px;
  cursor: pointer;
}

.new-chat, .settings-button { padding: 11px 14px; text-align: left; }
.new-chat {
  display: grid;
  place-items: center;
  height: 42px;
  padding: 0;
  border-radius: 14px;
  background: var(--panel);
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
  color: var(--text);
  font-size: 26px;
  line-height: 1;
  text-align: center;
}
.settings-button {
  display: flex;
  align-items: center;
  gap: 9px;
  border-radius: 14px;
  background: var(--panel);
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
  color: var(--text);
}
.settings-button svg { width: 19px; height: 19px; flex: 0 0 auto; }
.new-chat:hover, .settings-button:hover { border-color: var(--accent); }
.search-chat svg { width: 20px; height: 20px; }
.settings-button { margin-top: auto; }

.chat-list { display: flex; flex: 1 1 auto; flex-direction: column; gap: 8px; min-height: 0; overflow: auto; }
.chat-list { scrollbar-width: thin; scrollbar-color: transparent transparent; }
.chat-list:hover, .chat-list:focus-within { scrollbar-color: color-mix(in srgb, var(--muted) 45%, transparent) transparent; }
.chat-list::-webkit-scrollbar { width: 8px; height: 8px; }
.chat-list::-webkit-scrollbar-track { background: transparent; }
.chat-list::-webkit-scrollbar-thumb { background: transparent; border-radius: 999px; }
.chat-list:hover::-webkit-scrollbar-thumb, .chat-list:focus-within::-webkit-scrollbar-thumb { background: color-mix(in srgb, var(--muted) 35%, transparent); }
.chat-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 34px;
  align-items: center;
  gap: 6px;
  padding: 8px 8px 8px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.chat-item.active {
  background: color-mix(in srgb, var(--accent) 10%, var(--panel));
  box-shadow: inset 0 0 0 2px var(--accent), 0 1px 4px rgba(0,0,0,.06);
}
.chat-title {
  overflow: hidden;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
}
.chat-menu-button {
  display: grid;
  place-items: center;
  height: 30px;
  width: 30px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  line-height: 1;
}
.chat-menu-button:hover, .chat-menu-button:focus-visible {
  background: color-mix(in srgb, var(--text) 12%, transparent);
  color: var(--text);
  outline: none;
}
.chat-menu {
  position: absolute;
  right: 0;
  top: 40px;
  z-index: 1000;
  display: none;
  min-width: 116px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  box-shadow: -10px 18px 28px rgba(0,0,0,.16);
}
.chat-item.menu-open { z-index: 1000; }
.chat-item.menu-open .chat-menu { display: block; }
.chat-item.menu-above .chat-menu { top: auto; bottom: 40px; box-shadow: -6px -8px 18px rgba(0,0,0,.14); }
.chat-menu button {
  display: block;
  width: 100%;
  padding: 8px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  text-align: left;
  cursor: pointer;
}
.chat-menu button:hover { background: var(--panel-2); }
.chat-menu button[data-action="delete"] { color: #ff6f7d; }
.chat-menu button[data-action="delete"]:hover { background: rgba(255, 111, 125, .14); color: #ff8a8a; }