/* 消息区：气泡、工具行、编辑态、图片附件。 */
/* ===== 消息区 ===== */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  -webkit-overflow-scrolling: touch;
}
.hint {
  margin: auto;
  color: var(--text-muted);
  font-size: 14px;
}

.message-item {
  display: flex;
  flex-direction: column;
  width: fit-content;
  max-width: 85%;
  min-width: 0;
}
.message-item.user {
  align-self: flex-end;
  align-items: flex-end;
}
.message-item.assistant {
  align-self: flex-start;
  align-items: flex-start;
}
.msg {
  max-width: 100%;
  padding: 11px 15px;
  border-radius: var(--radius);
  white-space: pre-wrap;
  word-break: break-word;
}
.msg.has-images {
  min-width: min(280px, 72vw);
  padding: 6px;
}
.msg.has-images .message-text:not(:empty) {
  display: block;
  padding: 6px 9px 9px;
}
.message-images {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 5px;
  overflow: hidden;
  border-radius: calc(var(--radius) - 4px);
}
.message-images.single { grid-template-columns: 1fr; }
.message-image {
  display: block;
  width: 100%;
  height: 132px;
  object-fit: cover;
  background: rgba(31,30,29,.06);
  border-radius: 8px;
}
.message-images.single .message-image {
  height: auto;
  max-height: 360px;
  object-fit: contain;
}
.message-image-missing {
  display: grid;
  place-items: center;
  min-height: 88px;
  padding: 12px;
  color: var(--text-muted);
  background: rgba(31,30,29,.05);
  border-radius: 8px;
  font-size: 12px;
  text-align: center;
}
.msg.user {
  background: #f3e3da;
  color: var(--text-primary);
  box-shadow: 0 0 0 .5px rgba(217,119,87,.25);
  border-bottom-right-radius: 6px;
}
.msg.assistant {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow);
  border-bottom-left-radius: 6px;
}
.message-tools[hidden] { display: none; }
.message-tools {
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  margin: 0 4px;
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1;
}
.message-author {
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.message-copy,
.message-edit,
.message-reroll,
.message-edit-action {
  position: relative;
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 36px;
  padding: 2px 4px;
  color: inherit;
  background: transparent;
  border: none;
  border-radius: 8px;
  font: inherit;
  cursor: pointer;
  transition: color var(--motion-fast) ease, transform var(--motion-fast) var(--ease-out);
}
.message-copy::after,
.message-edit::after,
.message-reroll::after,
.message-edit-action::after {
  content: "";
  position: absolute;
  inset: -4px 0;
}
.message-copy svg,
.message-edit svg,
.message-reroll svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.65;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.message-copy.is-copied { color: var(--accent); }
.message-edit-action.is-save { color: var(--accent); }
.message-variants {
  display: flex;
  align-items: center;
}
.message-variants[hidden] { display: none; }
.message-variant-btn {
  position: relative;
  display: grid;
  place-items: center;
  min-width: 26px;
  min-height: 36px;
  padding: 0;
  color: inherit;
  background: transparent;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.message-variant-btn::after {
  content: "";
  position: absolute;
  inset: -4px 0;
}
.message-variant-btn:disabled { opacity: .3; cursor: default; }
.message-variant-btn svg {
  width: 13px;
  height: 13px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.message-variant-label {
  min-width: 24px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.message-item.is-editing { width: 100%; }
/* 编辑框统一撑满气泡最大宽度（85%），不随消息长短变；不定宽的话会被 textarea 撑成固定 225px */
.message-item.is-editing .msg { width: 100%; }
.message-edit-area {
  display: block;
  width: 100%;
  min-height: 1.6em; /* 跟一行正文一样高，不把短消息的气泡硬撑高 */
  padding: 0;
  border: none;
  background: transparent;
  color: inherit;
  font: inherit;
  line-height: inherit;
  resize: none;
  outline: none;
}
.reasoning {
  align-self: flex-start;
  max-width: 85%;
  color: var(--text-secondary);
  font-size: 13px;
}
.reasoning-toggle {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 0;
  color: var(--text-muted);
  background: transparent;
  border: none;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.reasoning-mark {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background:
    conic-gradient(from 0deg, rgba(217,119,87,0), rgba(217,119,87,0.95), rgba(217,119,87,0));
  animation: spin 1.4s linear infinite;
}
.reasoning-mark::after {
  content: '';
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  background: var(--bg-primary);
}
.reasoning.is-done .reasoning-mark {
  border: 1.5px solid rgba(31,30,29,0.32);
  background: transparent;
  animation: none;
}
.reasoning.is-done .reasoning-mark::after {
  inset: 4px;
  width: 7px;
  height: 4px;
  border-left: 1.5px solid rgba(31,30,29,0.55);
  border-bottom: 1.5px solid rgba(31,30,29,0.55);
  border-radius: 0;
  background: transparent;
  transform: rotate(-45deg);
}
.reasoning-title {
  min-width: 0;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.reasoning-done {
  display: none;
  color: var(--text-muted);
}
.reasoning.is-done .reasoning-done {
  display: inline;
}
.reasoning-chevron {
  color: var(--text-muted);
  transition: transform .18s ease;
}
.reasoning.is-open .reasoning-chevron {
  transform: rotate(180deg);
}
.reasoning-body {
  display: none;
  margin: 10px 0 0 9px;
  padding: 0 0 0 18px;
  border-left: 1px solid rgba(31,30,29,0.14);
  white-space: pre-wrap;
  word-break: break-word;
}
.reasoning.is-open .reasoning-body {
  display: block;
}
.reasoning-tools {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 10px 0 0 9px;
  padding: 0 0 0 18px;
  border-left: 1px solid rgba(31,30,29,0.14);
  color: var(--text-muted);
}
.reasoning:not(.is-open) .reasoning-tools {
  display: none;
}
@keyframes spin { to { transform: rotate(360deg); } }
.citations {
  align-self: flex-start;
  max-width: 85%;
  min-width: 0;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.5;
}
.citations-toggle {
  display: flex;
  align-items: center;
  gap: 9px;
  max-width: 100%;
  padding: 0;
  color: var(--text-muted);
  background: transparent;
  border: none;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.citations-chevron {
  flex: none;
  color: var(--text-muted);
  transition: transform .18s ease;
}
.citations.is-open .citations-chevron {
  transform: rotate(180deg);
}
.citations-list {
  display: none;
  flex-direction: column;
  gap: 6px;
  max-width: 100%;
  margin-top: 8px;
}
.citations.is-open .citations-list {
  display: flex;
}
.citations-list a {
  max-width: 100%;
  color: var(--text-secondary);
  overflow-wrap: anywhere;
}
.msg.error {
  align-self: flex-start;
  background: #fbeae5;
  color: #9a3412;
  box-shadow: none;
}
/* ===== 新建 / 编辑文件夹弹窗（手机是底部弹出的卡，宽屏居中）===== */
.folder-editor { position: fixed; inset: 0; z-index: 29; }
.folder-editor[hidden] { display: none; }
.folder-editor-scrim {
  position: absolute;
  inset: 0;
  background: rgba(31,30,29,.32);
  opacity: 0;
  transition: opacity var(--motion-panel) ease;
}
.folder-editor-card {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  max-height: min(88dvh, 640px);
  margin: 0;
  padding: 18px 18px calc(16px + env(safe-area-inset-bottom));
  overflow-y: auto;
  background: var(--bg-card);
  border-radius: 22px 22px 0 0;
  box-shadow: 0 -12px 40px rgba(31,30,29,.16);
  transform: translateY(24px);
  opacity: 0;
  transition: transform var(--motion-panel) var(--ease-drawer), opacity var(--motion-fast) ease;
}
.folder-editor.is-open .folder-editor-scrim { opacity: 1; }
.folder-editor.is-open .folder-editor-card { transform: none; opacity: 1; }
@media (min-width: 720px) {
  .folder-editor-card {
    top: 50%;
    bottom: auto;
    left: 50%;
    right: auto;
    width: min(440px, calc(100vw - 32px));
    max-height: min(86vh, 680px);
    border-radius: 22px;
    transform: translate(-50%, calc(-50% + 16px));
  }
  .folder-editor.is-open .folder-editor-card { transform: translate(-50%, -50%); }
}
@media (prefers-reduced-motion: reduce) {
  .folder-editor-card { transition: opacity var(--motion-fast) ease; transform: none; }
  .folder-editor.is-open .folder-editor-card { transform: none; }
  @media (min-width: 720px) {
    .folder-editor-card, .folder-editor.is-open .folder-editor-card { transform: translate(-50%, -50%); }
  }
}
.folder-editor-title { margin: 0 0 14px; font-size: 17px; font-weight: 650; }
.folder-editor-head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.folder-editor-preview { display: contents; }
.folder-editor-name { flex: 1; min-width: 0; }
.folder-editor-label { display: block; margin-bottom: 8px; font-size: 13px; font-weight: 650; }
.folder-editor-colors {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 6px;
  margin-bottom: 14px;
}
.folder-editor-color {
  position: relative;
  aspect-ratio: 1;
  width: 100%;
  padding: 0;
  background: var(--swatch-bg);
  border: none;
  border-radius: 50%;
  box-shadow: inset 0 0 0 2px var(--swatch-fg);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: transform var(--motion-fast) var(--ease-out), box-shadow var(--motion-fast) ease;
}
.folder-editor-color[aria-pressed="true"] { box-shadow: inset 0 0 0 2px var(--swatch-fg), 0 0 0 2px var(--bg-card), 0 0 0 4px var(--swatch-fg); }
.folder-editor-color:active { transform: scale(.92); }
.folder-editor-icons {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 7px;
  margin-bottom: 16px;
}
.folder-editor-icon {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  width: 100%;
  padding: 0;
  color: var(--text-secondary);
  background: rgba(31,30,29,.045);
  border: none;
  border-radius: 11px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background-color var(--motion-fast) ease, color var(--motion-fast) ease, transform var(--motion-fast) var(--ease-out);
}
.folder-editor-icon svg { width: 21px; height: 21px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.folder-editor-icon[aria-pressed="true"] { color: var(--pick-fg); background: var(--pick-bg); }
.folder-editor-icon:active { transform: scale(.92); }
.folder-editor-prompt-row { display: block; margin-bottom: 16px; }
.folder-editor-error { margin: 0 0 12px; color: #9a3412; font-size: 13px; }
.folder-editor-error:empty { display: none; }
.folder-editor-actions { display: flex; justify-content: flex-end; gap: 8px; }
.folder-editor-cancel,
.folder-editor-save {
  min-height: 40px;
  padding: 0 18px;
  border: none;
  border-radius: 999px;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: transform 100ms ease-out, opacity var(--motion-fast) ease;
}
.folder-editor-cancel { color: var(--text-primary); background: rgba(31,30,29,.06); }
.folder-editor-save { color: #fff; background: var(--btn-primary-bg); }
.folder-editor-save:disabled { opacity: .4; cursor: default; }
.folder-editor-cancel:active, .folder-editor-save:not(:disabled):active { transform: scale(.97); }