/* ============================================================
   HydraChat · components.css
   按钮 / 表单 / 分组折叠 / 消息气泡 / 波纹
   ============================================================ */

/* ---------------- 图标按钮 ---------------- */
.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  border: 1px solid transparent;
  position: relative;
  transition: background .18s ease, color .18s ease, border-color .18s ease, transform .18s var(--ease-spring);
}
.icon-btn:hover { background: var(--surface-3); color: var(--text); }
.icon-btn:active { transform: scale(.94); }
.icon-btn.is-on { background: var(--accent-soft); color: var(--accent); }

/* tooltip */
[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  top: calc(100% + 7px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--text);
  color: var(--bg);
  font-size: 11px;
  line-height: 1.5;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s var(--ease-spring);
  z-index: 50;
}
[data-tip]:hover::after { opacity: 1; transform: translateX(-50%) translateY(0); transition-delay: .4s; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 8px 15px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 550;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
  transition: filter .18s ease, box-shadow .2s ease, transform .18s var(--ease-spring),
              background .2s ease, color .2s ease, border-color .2s ease;
}
.btn:hover { filter: brightness(1.07); box-shadow: var(--shadow-2); }
.btn:active { transform: scale(.97); }
.btn--ghost { background: var(--surface-2); color: var(--text-2); border-color: var(--border); }
.btn--ghost:hover { background: var(--surface-3); color: var(--text); }
.btn--danger {
  background: color-mix(in srgb, var(--err) 10%, transparent);
  color: var(--err);
  border-color: color-mix(in srgb, var(--err) 24%, transparent);
}
.btn--danger:hover { background: color-mix(in srgb, var(--err) 17%, transparent); filter: none; }
.btn--block { width: 100%; }
.btn--sm { padding: 5px 11px; font-size: 12px; }

/* ---------------- 新建会话 ---------------- */
.new-chat {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  width: 100%;
  padding: 9px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 550;
  position: relative;
  overflow: hidden;
  transition: filter .18s ease, box-shadow .2s ease;
}
.new-chat:hover { filter: brightness(1.07); box-shadow: var(--shadow-2); }

/* ---------------- 搜索 ---------------- */
.sidebar__search {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 7px 11px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-3);
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.sidebar__search:focus-within {
  border-color: var(--accent-line);
  box-shadow: 0 0 0 3px var(--accent-soft);
  background: var(--surface);
}
.sidebar__search input {
  flex: 1; min-width: 0;
  border: none; outline: none; background: none;
  font-size: 13px;
}
.sidebar__search input::-webkit-search-cancel-button { filter: grayscale(1) opacity(.4); }

/* ---------------- 会话条目 ---------------- */
.conv-list { display: flex; flex-direction: column; gap: 2px; }
.conv-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-2);
  transition: background .18s ease, color .18s ease;
  position: relative;
}
.conv-item:hover { background: var(--surface-2); color: var(--text); }
.conv-item.is-active { background: var(--accent-soft); color: var(--accent); font-weight: 550; }
.conv-item.is-active::before {
  content: "";
  position: absolute;
  left: 0; top: 24%;
  width: 3px; height: 52%;
  border-radius: 0 3px 3px 0;
  background: var(--accent);
  animation: barIn .35s var(--ease-spring);
}
@keyframes barIn { from { transform: scaleY(0); opacity: 0; } to { transform: scaleY(1); opacity: 1; } }
.conv-item__body { min-width: 0; flex: 1; }
.conv-item__title {
  font-size: 13px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.conv-item__sub {
  font-size: 11px;
  color: var(--text-3);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.conv-item__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex: none; }

/* ---------------- 分组折叠 ---------------- */
.group {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  overflow: hidden;
  transition: border-color .2s ease;
}
.group:hover { border-color: var(--border-strong); }
.group__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px var(--sp-3);
  cursor: pointer;
  user-select: none;
  transition: background .18s ease;
}
.group__head:hover { background: var(--surface-3); }
.group__title { font-size: 13px; font-weight: 600; letter-spacing: -.01em; }
.group__head .caret { color: var(--text-3); transition: transform var(--dur-collapse) var(--ease-smooth); }
.group.is-collapsed .group__head .caret { transform: rotate(-90deg); }

/* grid-rows 0fr → 1fr：不定高平滑折叠 */
.group__body {
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows var(--dur-collapse) var(--ease-smooth);
}
.group.is-collapsed .group__body { grid-template-rows: 0fr; }
.group__body > .group__inner {
  overflow: hidden;
  min-height: 0;
  opacity: 1;
  transition: opacity calc(var(--dur-collapse) * .7) ease;
}
.group.is-collapsed .group__body > .group__inner { opacity: 0; }

/* ---------------- 设置行 ---------------- */
.row {
  display: grid;
  grid-template-columns: 104px 1fr auto;
  align-items: center;
  gap: var(--sp-3);
  padding: 7px var(--sp-3);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 50%, transparent);
}
.row:last-child { border-bottom: none; }
.row > label { font-size: 12.5px; color: var(--text-2); line-height: 1.35; }
.row .mono { min-width: 40px; text-align: right; }

/* 滑块 */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%; height: 18px;
  background: transparent;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--accent) var(--fill, 0%), var(--surface-3) var(--fill, 0%));
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px; height: 13px;
  margin-top: -4.5px;
  border-radius: 50%;
  background: #fff;
  border: 2.5px solid var(--accent);
  box-shadow: var(--shadow-1);
  transition: transform .16s var(--ease-spring);
}
input[type="range"]:hover::-webkit-slider-thumb { transform: scale(1.22); }
input[type="range"]:active::-webkit-slider-thumb { transform: scale(.92); }
input[type="range"]::-moz-range-track { height: 4px; border-radius: 99px; background: var(--surface-3); }
input[type="range"]::-moz-range-progress { height: 4px; border-radius: 99px; background: var(--accent); }
input[type="range"]::-moz-range-thumb {
  width: 13px; height: 13px; border-radius: 50%;
  background: #fff; border: 2.5px solid var(--accent);
}

/* 开关 */
input[type="checkbox"] {
  -webkit-appearance: none;
  appearance: none;
  width: 34px; height: 19px;
  border-radius: 99px;
  background: var(--surface-3);
  border: 1px solid var(--border-strong);
  position: relative;
  cursor: pointer;
  justify-self: end;
  transition: background .24s var(--ease-smooth), border-color .24s ease;
}
input[type="checkbox"]::after {
  content: "";
  position: absolute;
  top: 2px; left: 2px;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--shadow-1);
  transition: transform .26s var(--ease-spring);
}
input[type="checkbox"]:checked { background: var(--accent); border-color: var(--accent); }
input[type="checkbox"]:checked::after { transform: translateX(15px); }
input[type="checkbox"]:active::after { transform: scale(.86); }
input[type="checkbox"]:checked:active::after { transform: translateX(15px) scale(.86); }

/* 分段控件 */
.seg {
  display: inline-flex;
  padding: 2px;
  border-radius: 8px;
  background: var(--surface-3);
  border: 1px solid var(--border);
  gap: 2px;
  overflow: hidden;
}
.seg button {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-2);
  white-space: nowrap;
  transition: background .2s ease, color .2s ease, box-shadow .2s ease, transform .18s var(--ease-spring);
}
.seg button:hover { color: var(--text); }
.seg button.is-active {
  background: var(--surface);
  color: var(--accent);
  box-shadow: var(--shadow-1);
  font-weight: 550;
}

/* 颜色字段 */
.color-field { display: flex; align-items: center; gap: var(--sp-2); }
.color-field input[type="color"] {
  -webkit-appearance: none;
  appearance: none;
  width: 30px; height: 24px;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  background: none;
  padding: 0;
  cursor: pointer;
  overflow: hidden;
}
.color-field input[type="color"]::-webkit-color-swatch-wrapper { padding: 2px; }
.color-field input[type="color"]::-webkit-color-swatch { border: none; border-radius: 5px; }

/* 文本输入 */
.text-input {
  width: 100%;
  padding: 6px 10px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 12px;
  font-family: "JetBrains Mono", Consolas, monospace;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.text-input:focus { border-color: var(--accent-line); box-shadow: 0 0 0 3px var(--accent-soft); }

/* 日志 */
.log-box {
  margin-top: var(--sp-2);
  height: 140px;
  overflow-y: auto;
  padding: var(--sp-2);
  border-radius: var(--radius-sm);
  background: var(--surface-3);
  border: 1px solid var(--border);
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 11px;
  line-height: 1.65;
  color: var(--text-2);
}
.log-line { animation: logIn .3s var(--ease-smooth); }
.log-line__t { color: var(--text-3); margin-right: 6px; }
.log-line--ok  { color: var(--ok); }
.log-line--err { color: var(--err); }
@keyframes logIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }

/* ---------------- 徽标 / 头像 ---------------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 99px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 11px;
  font-weight: 550;
  font-family: "JetBrains Mono", Consolas, monospace;
}
.avatar {
  width: 30px; height: 30px;
  border-radius: 9px;
  display: grid; place-items: center;
  font-size: 12px; font-weight: 650;
  background: var(--accent-2);
  color: #fff;
  flex: none;
  letter-spacing: .02em;
}
.avatar--sm { width: 26px; height: 26px; border-radius: 8px; font-size: 11px; }
.avatar--bot { background: var(--accent); }
.avatar--canvas {
  width: 28px; height: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0;
  overflow: hidden;
  image-rendering: pixelated;
}

/* ---------------- 消息 ---------------- */
.msg {
  display: flex;
  gap: var(--sp-3);
  align-items: flex-start;
  max-width: 100%;
}
.msg--user { flex-direction: row-reverse; }
.msg__body { min-width: 0; max-width: min(100%, var(--bubble-max)); display: flex; flex-direction: column; gap: 3px; }
.msg--user .msg__body { align-items: flex-end; }
.msg__bubble {
  padding: 9px 13px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 13.5px;
  line-height: 1.65;
  word-break: break-word;
  white-space: pre-wrap;
  position: relative;
  overflow: hidden;
}
.msg--bot .msg__bubble { border-bottom-left-radius: 5px; }
.msg--user .msg__bubble {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
  border-bottom-right-radius: 5px;
}
.msg__bubble--shadow { box-shadow: var(--shadow-1); }
.msg__bubble--error {
  background: color-mix(in srgb, var(--err) 8%, var(--surface));
  border-color: color-mix(in srgb, var(--err) 26%, transparent);
  color: var(--err);
}

/* ---------------- 工具卡片 + 思考过程 ---------------- */
/* 工具卡片与思考过程排在气泡上方，按事件到达顺序纵向排列 */
.msg__stream {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 2px;
}
.msg__stream:empty { display: none; }

.tool-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  overflow: hidden;
  font-size: 12.5px;
  transition: border-color .25s ease, background .25s ease;
}
.tool-card.is-running { border-color: var(--accent-line); }
.tool-card.is-done { border-color: color-mix(in srgb, var(--ok) 30%, var(--border)); }
.tool-card.is-failed { border-color: color-mix(in srgb, var(--err) 34%, var(--border)); }

.tool-card__head {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 10px;
  min-width: 0;
}
.tool-card__icon {
  display: grid;
  place-items: center;
  width: 20px; height: 20px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  flex: none;
}
.tool-card.is-failed .tool-card__icon {
  background: color-mix(in srgb, var(--err) 12%, transparent);
  color: var(--err);
}
.tool-card__icon .ico { fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; }
.tool-card__label { font-weight: 600; color: var(--text); flex: none; }
.tool-card__arg {
  color: var(--text-3);
  font-size: 11.5px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  flex: 1 1 auto;
}
.tool-card__spacer { flex: 1 1 auto; }
.tool-card__status {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-3);
  font-size: 11.5px;
  flex: none;
}
.tool-card__spinner {
  width: 11px; height: 11px;
  border-radius: 50%;
  border: 1.6px solid color-mix(in srgb, var(--accent) 28%, transparent);
  border-top-color: var(--accent);
  animation: toolSpin .7s linear infinite;
}
@keyframes toolSpin { to { transform: rotate(360deg); } }
.tool-card__meta { opacity: .65; font-family: "JetBrains Mono", Consolas, monospace; font-size: 10.5px; }

.tool-card__body {
  border-top: 1px solid var(--border);
  padding: 8px 10px;
  background: var(--surface);
}
.tool-card__error { color: var(--err); font-size: 12px; }
.tool-card__page-title {
  display: block;
  color: var(--accent);
  font-weight: 600;
  font-size: 12.5px;
  margin-bottom: 5px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.tool-card__content {
  margin: 0;
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--text-2);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 260px;
  overflow: auto;
}
.tool-card__more { margin-top: 5px; font-size: 11px; color: var(--text-3); }

.tool-card__results { display: flex; flex-direction: column; gap: 9px; }
.tool-result { display: flex; flex-direction: column; gap: 2px; }
.tool-result__title {
  color: var(--accent);
  font-weight: 560;
  font-size: 12.5px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.tool-result__title:hover { text-decoration: underline; }
.tool-result__site { font-size: 10.5px; color: var(--text-3); }
.tool-result__snippet {
  margin: 0;
  font-size: 12px;
  line-height: 1.55;
  color: var(--text-2);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 思考过程 */
.reasoning {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface-2) 70%, transparent);
  overflow: hidden;
}
.reasoning__toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  padding: 6px 9px;
  color: var(--text-3);
  font-size: 11.5px;
  transition: color .18s ease, background .18s ease;
}
.reasoning__toggle:hover { color: var(--text-2); background: var(--surface-2); }
.reasoning__toggle .caret { transition: transform var(--dur-collapse) var(--ease-smooth); }
.reasoning.is-open .reasoning__toggle .caret { transform: rotate(180deg); }
.reasoning__label { font-weight: 560; }
.reasoning__hint { margin-left: auto; opacity: .7; }
.reasoning__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur-collapse) var(--ease-smooth);
}
.reasoning.is-open .reasoning__body { grid-template-rows: 1fr; }
.reasoning__body > pre {
  overflow: hidden;
  min-height: 0;
  margin: 0;
  padding: 0 9px;
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 11.5px;
  line-height: 1.65;
  color: var(--text-3);
  white-space: pre-wrap;
  word-break: break-word;
  opacity: 0;
  transition: opacity calc(var(--dur-collapse) * .7) ease;
}
.reasoning.is-open .reasoning__body > pre {
  opacity: 1;
  padding-bottom: 9px;
}

/* 工具开关 */
.tool-toggles { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; }
.tool-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-3);
  font-size: 11.5px;
  line-height: 1.4;
  transition: color .18s ease, border-color .18s ease, background .18s ease, transform .18s var(--ease-spring);
}
.tool-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.tool-toggle:active { transform: scale(.94); }
.tool-toggle.is-on {
  color: var(--accent);
  border-color: var(--accent-line);
  background: var(--accent-soft);
}
.tool-toggle.is-disabled { opacity: .45; cursor: not-allowed; }
.tool-toggle__icon { display: grid; place-items: center; }
.tool-toggle__icon .ico { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.tool-toggle__warn { font-size: 10px; opacity: .8; }
.msg__meta {
  display: flex; align-items: center; gap: 6px;
  font-size: 10.5px;
  color: var(--text-3);
  padding: 0 2px;
}
.msg__name { font-weight: 550; color: var(--text-2); }
.msg__divider { height: 1px; background: var(--border); margin: var(--sp-2) 0; }

/* 消息入场 */
.msg-enter { animation: msgIn .42s var(--ease-spring) both; }
@keyframes msgIn {
  from { opacity: 0; transform: translateY(12px) scale(.97); }
  to   { opacity: 1; transform: none; }
}
.msg--user.msg-enter { animation-name: msgInUser; }
@keyframes msgInUser {
  from { opacity: 0; transform: translateY(12px) scale(.97) translateX(14px); }
  to   { opacity: 1; transform: none; }
}

/* 打字指示 */
.typing { display: inline-flex; gap: 4px; align-items: center; padding: 3px 0; }
.typing i {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--text-3);
  animation: typingBounce 1.15s var(--ease-smooth) infinite;
}
.typing i:nth-child(2) { animation-delay: .14s; }
.typing i:nth-child(3) { animation-delay: .28s; }
@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: .45; }
  30%           { transform: translateY(-5px); opacity: 1; }
}

/* ---------------- 波纹 ---------------- */
.ripple {
  position: absolute;
  border-radius: 50%;
  background: var(--ripple-color, currentColor);
  opacity: var(--ripple-opacity, .35);
  transform: scale(0);
  pointer-events: none;
  animation: rippleOut var(--ripple-duration, 520ms) var(--ease-smooth) forwards;
}
.ripple--square { border-radius: 4px; }
@keyframes rippleOut {
  from { transform: scale(0); opacity: var(--ripple-opacity, .35); }
  to   { transform: scale(1); opacity: 0; }
}

/* 点击回弹 */
.bounce {
  animation: bounceHit var(--bounce-duration, 420ms) var(--bounce-ease, cubic-bezier(.34,1.56,.64,1));
  transform-origin: center;
}
@keyframes bounceHit {
  0%   { transform: scale(1); }
  28%  { transform: scale(var(--bounce-min, .9)); }
  58%  { transform: scale(var(--bounce-max, 1.08)); }
  78%  { transform: scale(.985); }
  100% { transform: scale(1); }
}

/* ---------------- 引擎预览 ---------------- */
.engine-preview {
  margin: var(--sp-2) var(--sp-3) var(--sp-3);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-3);
  padding: var(--sp-2);
  display: flex; flex-direction: column; align-items: center; gap: var(--sp-2);
}
.engine-preview canvas {
  image-rendering: pixelated;
  border-radius: 6px;
  background: var(--surface);
  max-width: 100%;
}
.engine-preview__meta { display: flex; align-items: center; gap: var(--sp-3); }

/* ---------------- Chip ---------------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 12.5px;
  position: relative;
  overflow: hidden;
  transition: background .18s ease, color .18s ease, border-color .18s ease, transform .18s var(--ease-spring);
}
.chip:hover { background: var(--surface-3); color: var(--text); border-color: var(--border-strong); }
.chip:active { transform: scale(.95); }
.chip--icon { gap: 5px; }

/* ---------------- 模型选择器 ---------------- */
.model-picker { position: relative; }

.model-picker__btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 9px 5px 7px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 12.5px;
  max-width: 260px;
  transition: background .18s ease, color .18s ease, border-color .18s ease, transform .18s var(--ease-spring);
}
.model-picker__btn:hover { background: var(--surface-3); color: var(--text); border-color: var(--border-strong); }
.model-picker__btn:active { transform: scale(.97); }
.model-picker__icon {
  width: 17px; height: 17px;
  object-fit: contain;
  flex: none;
  border-radius: 4px;
}
.model-picker__label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.model-picker__btn .caret { color: var(--text-3); transition: transform var(--dur-collapse) var(--ease-smooth); }
.model-picker__btn[aria-expanded="true"] .caret { transform: rotate(180deg); }

.model-picker__menu {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 0;
  z-index: 50;
  min-width: 290px;
  max-height: 340px;
  overflow-y: auto;
  padding: 5px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-3);
  opacity: 0;
  transform: translateY(8px) scale(.97);
  transform-origin: bottom left;
  transition: opacity .2s var(--ease-smooth), transform .28s var(--ease-spring);
}
.model-picker__menu.is-open { opacity: 1; transform: none; }

.model-menu__group {
  padding: 7px 9px 4px;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--text-3);
}

.model-opt {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 6px 9px;
  border-radius: 8px;
  text-align: left;
  color: var(--text-2);
  font-size: 12.5px;
  transition: background .16s ease, color .16s ease;
}
.model-opt:hover { background: var(--surface-2); color: var(--text); }
.model-opt.is-active { background: var(--accent-soft); color: var(--accent); }
.model-opt__icon {
  width: 20px; height: 20px;
  display: grid;
  place-items: center;
  flex: none;
}
.model-opt__icon img { width: 18px; height: 18px; object-fit: contain; border-radius: 4px; }
.model-opt__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  opacity: .5;
}
.model-opt__name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.model-opt__tag {
  font-size: 10.5px;
  color: var(--text-3);
  flex: none;
}

/* ---------------- 上下文计量 ---------------- */
.ctx-meter {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11px;
  color: var(--text-3);
}
.ctx-meter__track {
  width: 68px; height: 4px;
  border-radius: 99px;
  background: var(--surface-3);
  overflow: hidden;
}
.ctx-meter__bar {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: var(--accent);
  transition: width .45s var(--ease-smooth), background .3s ease;
}
.ctx-meter__bar.is-warn { background: var(--warn); }
.ctx-meter__bar.is-over { background: var(--err); }

/* ---------------- 压缩标记 ---------------- */
.compact-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  max-width: var(--bubble-max);
  margin: 0 auto var(--sp-2);
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border: 1px solid var(--accent-line);
  color: var(--accent);
  font-size: 12px;
  animation: msgIn .4s var(--ease-spring) both;
}
.compact-badge .icon-btn--tiny {
  width: auto;
  height: 22px;
  padding: 0 9px;
  margin-left: auto;
  font-size: 11px;
  color: var(--accent);
  white-space: nowrap;
  flex: none;
}
.compact-badge .icon-btn--tiny:hover { background: var(--accent-soft); }
.compact-badge.is-over {
  background: color-mix(in srgb, var(--warn) 10%, transparent);
  border-color: color-mix(in srgb, var(--warn) 30%, transparent);
  color: var(--warn);
}
.compact-detail {
  width: 100%;
  max-width: var(--bubble-max);
  margin: 0 auto var(--sp-2);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 11.5px;
  line-height: 1.7;
  white-space: pre-wrap;
  max-height: 220px;
  overflow-y: auto;
  animation: msgIn .35s var(--ease-smooth) both;
}

/* ---------------- 空列表 ---------------- */
.conv-empty {
  padding: 14px 10px;
  text-align: center;
  font-size: 12px;
  color: var(--text-3);
}

/* ---------------- 图标按钮 ---------------- */
.icon-btn--tiny {
  width: 24px; height: 22px;
  font-size: 11px;
  border-radius: 6px;
  white-space: nowrap;
}

/* ---------------- 调试覆盖层 ---------------- */
.debug-overlay {
  position: fixed;
  left: 12px; bottom: 12px;
  z-index: 9000;
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(10, 14, 20, .84);
  color: #cfe3ff;
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 11px;
  line-height: 1.7;
  pointer-events: none;
  white-space: pre;
}