/* ==========================================================================
   imgbox — 视觉工作台（Agent 对话模式）
   设计语汇：暖白纸感 + 墨绿点缀 + Agent 执行时间轴
   依赖：tokens.css / base.css
   ========================================================================== */

:root {
  --left-w: 270px;
  --right-w: 290px;
}

/* ==========================================================================
   布局骨架：三栏
   ========================================================================== */
.workbench {
  display: grid;
  grid-template-columns: var(--left-w) 1fr var(--right-w);
  height: calc(100vh - var(--header-h));
  width: 100%;
  overflow: hidden;
  transition: grid-template-columns var(--dur-base) var(--ease-out);
}
.workbench.is-gallery-collapsed {
  grid-template-columns: var(--left-w) 1fr 46px;
}

/* ==========================================================================
   顶部导航
   ========================================================================== */
.topbar {
  height: var(--header-h);
  background: color-mix(in srgb, var(--bg-canvas) 86%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-4);
  box-sizing: border-box;
  z-index: var(--z-sticky);
}
.brand-mark {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.01em;
}
.brand-logo {
  width: 28px;
  height: 28px;
  border-radius: 9px;
  background: var(--accent);
  display: grid;
  place-items: center;
  color: var(--text-inverse);
}
.brand-logo svg { width: 15px; height: 15px; }
.topbar-actions { display: flex; align-items: center; gap: 2px; }
.avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-text);
  display: grid;
  place-items: center;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  margin-left: var(--sp-2);
}
/* 全局与工作区去除可见滚动条 */
::-webkit-scrollbar {
  width: 0px !important;
  height: 0px !important;
  display: none !important;
}
html, body, .workbench, .col-center, .timeline-scroll, .threads-list, .gallery-scroll {
  scrollbar-width: none !important;
  -ms-overflow-style: none !important;
}

.topbar-quota {
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--bg-sunken);
  margin-right: 4px;
  white-space: nowrap !important;
  flex-shrink: 0 !important;
  display: inline-flex;
  align-items: center;
}

/* ==========================================================================
   左栏：会话列表
   ========================================================================== */
.col-sidebar {
  background: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.sidebar-head {
  padding: var(--sp-3) var(--sp-3) var(--sp-2);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  flex-shrink: 0;
}
.sidebar-title {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0 2px;
}

/* 搜索 */
.thread-search {
  position: relative;
}
.thread-search input {
  width: 100%;
  height: 34px;
  padding: 0 var(--sp-3) 0 30px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-sunken);
  font-size: var(--fs-sm);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.thread-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.thread-search svg {
  position: absolute;
  left: 9px;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  color: var(--text-tertiary);
  pointer-events: none;
}

.new-thread-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--accent);
  color: var(--text-inverse);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  transition: background-color var(--dur-fast);
}
.new-thread-btn:hover { background: var(--accent-hover); }

/* 会话列表 */
.threads-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--sp-1) var(--sp-2) var(--sp-3);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.thread-group-label {
  font-size: 11px;
  color: var(--text-tertiary);
  font-weight: var(--fw-medium);
  padding: var(--sp-3) 8px 4px;
}
.thread-nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 9px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--dur-fast), border-color var(--dur-fast);
  position: relative;
}
.thread-nav-item:hover { background: var(--bg-hover); }
.thread-nav-item.is-active {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
}
.thread-nav-icon {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  color: var(--text-tertiary);
}
.thread-nav-item.is-active .thread-nav-icon { color: var(--accent-text); }
.thread-nav-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.thread-nav-title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-primary);
}
.thread-nav-item.is-active .thread-nav-title { color: var(--accent-text); }
.thread-nav-meta {
  font-size: 11px;
  color: var(--text-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.thread-nav-actions {
  display: none;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}
.thread-nav-item:hover .thread-nav-actions,
.thread-nav-item.is-active .thread-nav-actions { display: flex; }

/* 会话状态指示：进行中 / 完成未读 */
.thread-status-dot {
  position: absolute;
  left: -2px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 16px;
  border-radius: 2px;
  background: var(--accent);
  display: none;
}
.thread-nav-item.is-running .thread-status-dot {
  display: block;
  animation: thread-pulse 1.4s ease-in-out infinite;
}
.thread-nav-item.is-unread .thread-nav-title::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-left: 6px;
  vertical-align: middle;
}
@keyframes thread-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.thread-action-btn {
  width: 22px;
  height: 22px;
  border-radius: 5px;
  color: var(--text-tertiary);
  display: grid;
  place-items: center;
  transition: background-color var(--dur-fast), color var(--dur-fast);
}
.thread-action-btn:hover { background: var(--bg-active); color: var(--text-primary); }
.thread-action-btn.btn-del:hover { background: var(--danger-soft); color: var(--danger); }
.thread-rename-input {
  width: 100%;
  height: 22px;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  padding: 0 6px;
  border-radius: 5px;
  border: 1px solid var(--accent);
  background: var(--bg-surface);
  color: var(--text-primary);
  outline: none;
  box-shadow: 0 0 0 2px var(--accent-soft);
}

/* ==========================================================================
   中栏：对话时间线
   ========================================================================== */
.col-center {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-canvas);
}
.center-header {
  height: 52px;
  padding: 0 var(--sp-5);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: color-mix(in srgb, var(--bg-surface) 70%, transparent);
  backdrop-filter: blur(10px);
  flex-shrink: 0;
  z-index: 2;
}
.center-title-wrap { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.center-title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.center-subtitle {
  font-size: 11px;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  gap: 5px;
}
.planner-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
  color: var(--accent-text);
  font-size: 11px;
  font-weight: var(--fw-medium);
}

.timeline-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--sp-6) var(--sp-5) 40px;
  box-sizing: border-box;
  overscroll-behavior-y: contain;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
}
.timeline-inner {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
}

/* ---------------- 空态 ---------------- */
.thread-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 12vh 20px;
  gap: var(--sp-4);
  animation: fade-up var(--dur-slow) var(--ease-out) both;
}
.thread-empty-mark {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
}
.thread-empty-mark svg { width: 26px; height: 26px; }
.thread-empty h2 {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
}
.thread-empty p {
  font-size: var(--fs-sm);
  color: var(--text-tertiary);
  max-width: 380px;
  line-height: var(--lh-relaxed);
}
.starter-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  width: 100%;
  max-width: 520px;
  margin-top: var(--sp-2);
}
.starter-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  padding: 12px 14px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  text-align: left;
  transition: border-color var(--dur-fast), transform var(--dur-fast), box-shadow var(--dur-fast);
}
.starter-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.starter-card-title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
}
.starter-card-desc {
  font-size: 11px;
  color: var(--text-tertiary);
  line-height: 1.5;
}

/* ---------------- 消息 ---------------- */
.msg { display: flex; flex-direction: column; }
.msg-user { align-items: flex-end; }
.user-bubble {
  max-width: 86%;
  background: var(--accent);
  color: var(--text-inverse);
  padding: 10px 14px;
  border-radius: 16px 16px 4px 16px;
  font-size: var(--fs-sm);
  line-height: var(--lh-normal);
  white-space: pre-wrap;
  word-break: break-word;
  animation: fade-up var(--dur-base) var(--ease-out) both;
}
.user-assets {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
  margin-bottom: 6px;
  max-width: 86%;
}
.user-asset-thumb {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 1px solid var(--border-default);
  cursor: zoom-in;
  transition: transform var(--dur-fast);
}
.user-asset-thumb:hover { transform: scale(1.05); }

.msg-assistant { align-items: flex-start; gap: var(--sp-3); }
.assistant-body {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.assistant-text {
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-word;
}

/* ---------------- Agent 执行时间轴 ---------------- */
.agent-timeline {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  overflow: hidden;
}
.agent-timeline-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  font-size: var(--fs-xs);
  color: var(--text-secondary);
  background: var(--bg-sunken);
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
  user-select: none;
}
.agent-timeline-head:hover { color: var(--text-primary); }
.agent-timeline-head .caret {
  margin-left: auto;
  transition: transform var(--dur-fast);
  color: var(--text-tertiary);
}
.agent-timeline.is-collapsed .caret { transform: rotate(-90deg); }
.agent-timeline.is-collapsed .agent-steps { display: none; }
.agent-head-status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: var(--fw-medium);
}
.agent-steps {
  padding: 6px 13px 12px;
  display: flex;
  flex-direction: column;
}
.agent-step {
  display: flex;
  gap: 11px;
  position: relative;
  padding: 7px 0 7px 0;
  animation: fade-in var(--dur-base) both;
}
.agent-step-rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 18px;
}
.agent-step-node {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--bg-sunken);
  border: 1.5px solid var(--border-default);
  color: var(--text-tertiary);
  z-index: 1;
}
.agent-step-node svg { width: 10px; height: 10px; }
.agent-step-line {
  flex: 1;
  width: 1.5px;
  background: var(--border-subtle);
  margin: 2px 0 -7px;
}
.agent-step:last-child .agent-step-line { display: none; }
.agent-step.is-active .agent-step-node {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}
.agent-step.is-done .agent-step-node {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--text-inverse);
}
.agent-step.is-error .agent-step-node {
  border-color: var(--danger);
  background: var(--danger-soft);
  color: var(--danger);
}
.agent-step-body { flex: 1; min-width: 0; padding-bottom: 2px; }
.agent-step-title {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}
.agent-step-desc {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 2px;
  line-height: 1.5;
  word-break: break-word;
}
.agent-step-desc.is-collapsed .agent-step-desc-text {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.agent-step-more {
  display: inline-block;
  margin-top: 3px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--accent);
  font-size: 11px;
  font-weight: var(--fw-medium);
  cursor: pointer;
}
.agent-step-more:hover { text-decoration: underline; }
.agent-step-thumbs {
  display: flex;
  gap: 6px;
  margin-top: 6px;
  flex-wrap: wrap;
}
.agent-step-thumb {
  width: 62px;
  height: 62px;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 1px solid var(--border-subtle);
  cursor: zoom-in;
  transition: transform var(--dur-fast), border-color var(--dur-fast);
}
.agent-step-thumb:hover { transform: scale(1.04); border-color: var(--accent); }

/* 生成中的脉冲点 */
.agent-spinner {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1.5px solid var(--accent-soft);
  border-top-color: var(--accent);
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 思考链折叠 */
.reasoning-box {
  border-left: 2px solid var(--border-default);
  padding: 2px 0 2px 12px;
  margin: 2px 0;
}
.reasoning-toggle {
  font-size: 11px;
  color: var(--text-tertiary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  user-select: none;
}
.reasoning-toggle:hover { color: var(--text-secondary); }
.reasoning-text {
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  line-height: 1.65;
  white-space: pre-wrap;
  margin-top: 6px;
  max-height: 220px;
  overflow-y: auto;
  font-family: var(--font-mono);
}
.reasoning-box.is-collapsed .reasoning-text { display: none; }

/* 产物图片网格 */
.result-images {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--sp-3);
}
.result-image-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: var(--bg-sunken);
  aspect-ratio: 1;
}
.result-image-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: zoom-in;
}
.result-image-actions {
  position: absolute;
  left: 6px;
  right: 6px;
  bottom: 6px;
  display: flex;
  justify-content: center;
  gap: 6px;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--dur-fast), transform var(--dur-fast);
  pointer-events: none;
}
.result-image-card:hover .result-image-actions { opacity: 1; transform: translateY(0); }
.result-image-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 26px;
  padding: 0 10px;
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--bg-surface) 88%, transparent);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  font-size: 11px;
  font-weight: var(--fw-medium);
  pointer-events: auto;
  cursor: pointer;
  transition: background-color var(--dur-fast), color var(--dur-fast);
}
.result-image-btn:hover { background: var(--accent); color: var(--text-inverse); border-color: var(--accent); }
.result-image-btn svg { width: 12px; height: 12px; }

@media (hover: none) {
  .result-image-actions { opacity: 1; transform: none; }
}

/* ---------------- 底部输入区（文档流，非悬浮） ---------------- */
.composer-wrap {
  flex-shrink: 0;
  padding: 0 var(--sp-5) var(--sp-4);
  background: linear-gradient(to top, var(--bg-canvas) 70%, transparent);
}
.composer {
  max-width: 760px;
  margin: 0 auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.composer:focus-within {
  border-color: var(--accent);
  box-shadow: 0 8px 28px color-mix(in srgb, var(--accent) 16%, transparent);
}

/* 素材胶囊架 */
.composer-attachments {
  display: none;
  gap: 8px;
  padding: 10px 12px 0;
  overflow-x: auto;
  scrollbar-width: thin;
}
.composer-attachments.is-visible { display: flex; }
.attach-chip {
  position: relative;
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-default);
  background: var(--bg-sunken);
}
.attach-chip img { width: 100%; height: 100%; object-fit: cover; }
.attach-chip-role {
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 16px;
  font-size: 9px;
  text-align: center;
  color: #fff;
  background: rgba(0, 0, 0, 0.55);
  border: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
  padding: 0;
}
.attach-chip-del {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  font-size: 11px;
  line-height: 1;
  display: grid;
  place-items: center;
  cursor: pointer;
}
.attach-chip-del:hover { background: var(--danger); }

/* 基准图提示 */
.base-image-chip {
  display: none;
  align-items: center;
  gap: 6px;
  margin: 10px 12px 0;
  padding: 5px 10px;
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
  color: var(--accent-text);
  font-size: 11px;
  width: fit-content;
}
.base-image-chip.is-visible { display: inline-flex; }
.base-image-chip button {
  color: currentColor;
  font-size: 13px;
  line-height: 1;
  padding: 0 2px;
}

.composer-input-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 12px 12px 8px;
}
.composer-input {
  flex: 1;
  border: none;
  outline: none;
  resize: none;
  background: transparent;
  font-size: var(--fs-sm);
  line-height: 1.55;
  min-height: 24px;
  max-height: 160px;
  color: var(--text-primary);
  font-family: inherit;
  padding: 0;
}
.composer-input::placeholder { color: var(--text-tertiary); }

.composer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 12px 10px;
}
.composer-tools { display: flex; align-items: center; gap: 4px; }
.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 30px;
  padding: 0 9px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: background-color var(--dur-fast), color var(--dur-fast);
}
.tool-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.tool-btn svg { width: 15px; height: 15px; }
.composer-hint { font-size: 11px; color: var(--text-tertiary); }

/* 自定义胶囊下拉（模型 / 比例 / 清晰度），替代原生 select */
.cpicker { position: relative; display: inline-flex; }

.cpicker-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 9px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  background: var(--bg-sunken);
  color: var(--text-secondary);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: border-color var(--dur-fast), background-color var(--dur-fast);
}
.cpicker-trigger:hover { border-color: var(--border-strong); color: var(--text-primary); }
.cpicker.is-open .cpicker-trigger {
  border-color: var(--accent);
  background: var(--bg-surface);
  box-shadow: 0 0 0 2px var(--accent-soft);
}
.cpicker-lead { width: 14px; height: 14px; flex-shrink: 0; color: var(--accent); }
.cpicker-label {
  color: var(--text-primary);
  max-width: 130px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.cpicker-caret {
  width: 11px; height: 11px; flex-shrink: 0;
  color: var(--text-tertiary);
  transition: transform var(--dur-fast);
}
.cpicker.is-open .cpicker-caret { transform: rotate(180deg); }

.cpicker-ratio-icon { display: inline-flex; align-items: center; justify-content: center; width: 14px; height: 14px; }
.ratio-box {
  display: block;
  border: 1.5px solid currentColor;
  border-radius: 2px;
  color: var(--text-secondary);
}

/* 下拉面板 */
.cpicker-panel {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 0;
  min-width: 160px;
  padding: 6px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-default);
  background: var(--bg-surface);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity var(--dur-fast), transform var(--dur-fast), visibility var(--dur-fast);
  z-index: 60;
}
.cpicker.is-open .cpicker-panel { opacity: 1; visibility: visible; transform: translateY(0); }
.cpicker-panel.is-grid { min-width: 0; width: 236px; }

.cpicker-list { display: flex; flex-direction: column; gap: 1px; max-height: 280px; overflow-y: auto; }

.cpicker-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 7px 9px;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-primary);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  text-align: left;
  cursor: pointer;
  transition: background-color var(--dur-fast);
}
.cpicker-item:hover { background: var(--bg-sunken); }
.cpicker-item.is-selected { color: var(--accent); }
.cpicker-item-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cpicker-item-hint {
  font-size: 10px;
  color: var(--text-tertiary);
  padding: 1px 5px;
  border-radius: var(--radius-pill);
  background: var(--bg-sunken);
}
.cpicker-check {
  width: 13px; height: 13px; flex-shrink: 0;
  color: var(--accent);
  opacity: 0;
}
.cpicker-item.is-selected .cpicker-check { opacity: 1; }

/* 比例网格 */
.cpicker-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  max-height: 300px;
  overflow-y: auto;
}
.ratio-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 9px 2px 7px;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background-color var(--dur-fast), color var(--dur-fast);
}
.ratio-item:hover { background: var(--bg-sunken); color: var(--text-primary); }
.ratio-item.is-selected { color: var(--accent); background: var(--accent-soft); }
.ratio-thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
}
.ratio-item.is-selected .ratio-box { color: var(--accent); }
.ratio-text { font-size: 10px; font-weight: var(--fw-medium); }

.send-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--text-inverse);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  transition: background-color var(--dur-fast), transform var(--dur-fast), opacity var(--dur-fast);
}
.send-btn:hover:not(:disabled) { background: var(--accent-hover); transform: scale(1.04); }
.send-btn:disabled { opacity: 0.35; cursor: not-allowed; transform: none; }
.send-btn svg { width: 17px; height: 17px; }

/* 本会话执行中的细进度条 */
.composer-progress {
  height: 2px;
  margin: 0 12px 8px;
  border-radius: 2px;
  overflow: hidden;
  background: var(--bg-sunken);
  display: none;
}
.composer-progress.is-visible { display: block; }
.composer-progress-bar {
  height: 100%;
  width: 40%;
  border-radius: 2px;
  background: var(--accent);
  animation: progress-slide 1.3s ease-in-out infinite;
}
@keyframes progress-slide {
  0% { margin-left: -40%; }
  100% { margin-left: 100%; }
}

/* ==========================================================================
   右栏：本会话画廊
   ========================================================================== */
/* ==========================================================================
   右栏：用户级统一画廊
   ========================================================================== */
.col-gallery {
  background: var(--bg-surface);
  border-left: 1px solid var(--border-subtle);
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.gallery-header {
  padding: var(--sp-2) var(--sp-3);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-shrink: 0;
  background: var(--bg-surface);
}
.gallery-nav-tabs {
  display: flex;
  background: var(--bg-sunken);
  border-radius: var(--radius-sm);
  padding: 2px;
  gap: 2px;
}
.gallery-tab-btn {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  font-size: 11px;
  font-weight: var(--fw-medium);
  padding: 5px 6px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all var(--dur-fast);
  white-space: nowrap;
}
.gallery-tab-btn:hover {
  color: var(--text-primary);
}
.gallery-tab-btn.is-active {
  background: var(--bg-surface);
  color: var(--text-primary);
  font-weight: var(--fw-semibold);
  box-shadow: var(--shadow-sm);
}
.gallery-pill-count {
  font-size: 10px;
  padding: 0 5px;
  border-radius: 99px;
  background: var(--bg-hover);
  color: var(--text-secondary);
  line-height: 16px;
}
.gallery-tab-btn.is-active .gallery-pill-count {
  background: var(--accent-soft);
  color: var(--accent-text);
}
.gallery-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.gallery-search-icon {
  position: absolute;
  left: 8px;
  width: 13px;
  height: 13px;
  color: var(--text-tertiary);
  pointer-events: none;
}
.gallery-search-wrap input {
  width: 100%;
  font-size: 11px;
  height: 28px;
  padding: 0 24px 0 26px;
  background: var(--bg-sunken);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  transition: border-color var(--dur-fast), background var(--dur-fast);
}
.gallery-search-wrap input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-surface);
}
.gallery-search-clear {
  position: absolute;
  right: 6px;
  width: 16px;
  height: 16px;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.gallery-search-clear:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}
.gallery-scroll {
  flex: 1;
  overflow-y: auto;
  padding: var(--sp-3);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-auto-rows: max-content; /* 彻底根除上下图片重叠：强制轨道行高严格等于图片卡片高度 */
  gap: 8px;
  align-content: start;
}
.gallery-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 11px;
  padding: 36px 12px;
  line-height: 1.7;
}
.gallery-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: var(--bg-sunken);
  cursor: zoom-in;
  transition: border-color var(--dur-fast), transform var(--dur-fast), box-shadow var(--dur-fast);
}
.gallery-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
/* 所属绘画标题标签（用户要求移除，展示纯净高清画面） */
.gallery-thread-tag {
  display: none !important;
}
/* 图片画面参数标签（比例与尺寸） */
.gallery-param-tag {
  position: absolute;
  bottom: 5px;
  left: 5px;
  background: rgba(18, 19, 21, 0.75);
  backdrop-filter: blur(6px);
  color: #d1d5db;
  font-size: 9.5px;
  font-family: var(--font-mono);
  font-weight: 500;
  padding: 1px 5px;
  border-radius: 4px;
  pointer-events: none;
  z-index: 1;
  letter-spacing: 0.02em;
  transition: opacity var(--dur-fast);
}
.gallery-item:hover .gallery-param-tag {
  opacity: 0.15;
}
/* 卡片常驻收藏星标 */
.gallery-fav-badge {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(18, 19, 21, 0.75);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #f59e0b;
  z-index: 1;
  pointer-events: none;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}
.gallery-fav-badge svg {
  width: 12px;
  height: 12px;
}
.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent 35%, rgba(0, 0, 0, 0.78));
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 5px;
  padding: 8px 4px;
  opacity: 0;
  transition: opacity var(--dur-fast);
  pointer-events: none;
  z-index: 2;
}
.gallery-item:hover .gallery-overlay {
  opacity: 1;
}
.gallery-act {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(6px);
  color: #fff;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background-color var(--dur-fast), transform var(--dur-fast);
  pointer-events: auto;
  border: none;
  padding: 0;
}
.gallery-act:hover {
  background: var(--accent);
  transform: scale(1.08);
}
.gallery-act svg {
  width: 13px;
  height: 13px;
}
.gallery-act.is-fav {
  color: #fff;
}
.gallery-act.is-fav:hover {
  background: #f59e0b;
  color: #fff;
}
.gallery-act.is-fav.is-favorited {
  background: rgba(245, 158, 11, 0.85);
  color: #fff;
}
.gallery-act.is-fav.is-favorited:hover {
  background: #d97706;
}
.gallery-act.is-danger:hover {
  background: var(--danger);
}
@media (hover: none) {
  .gallery-overlay {
    opacity: 0.92;
  }
}

.gallery-confirm {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--bg-surface) 95%, transparent);
  backdrop-filter: blur(6px);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px;
  text-align: center;
  z-index: 4;
}
.gallery-confirm.is-open {
  display: flex;
}
.gallery-confirm p {
  font-size: 11px;
  font-weight: var(--fw-semibold);
  color: var(--danger);
  margin: 0;
}
.gallery-confirm-btns {
  display: flex;
  gap: 6px;
}
.gallery-confirm-btns button {
  font-size: 10px;
  padding: 4px 9px;
  border-radius: 5px;
  cursor: pointer;
}
.gallery-confirm-yes {
  background: var(--danger);
  color: #fff;
  border: none;
}
.gallery-confirm-no {
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  background: var(--bg-surface);
}

/* 折叠条 */
.collapsed-strip {
  display: none;
  height: 100%;
  flex-direction: column;
  align-items: center;
  padding-top: var(--sp-4);
  gap: var(--sp-3);
  cursor: pointer;
  color: var(--text-tertiary);
}
.collapsed-strip:hover {
  color: var(--accent);
}
.collapsed-strip span {
  writing-mode: vertical-rl;
  letter-spacing: 3px;
  font-size: 11px;
}
.workbench.is-gallery-collapsed .col-gallery .gallery-header,
.workbench.is-gallery-collapsed .col-gallery .gallery-scroll {
  display: none;
}
.workbench.is-gallery-collapsed .col-gallery .collapsed-strip {
  display: flex;
}

/* 标题智能更新呼吸高亮动画 */
@keyframes titleGlow {
  0% {
    background-color: var(--accent-soft);
    color: var(--accent-text);
    transform: scale(1.02);
  }
  50% {
    background-color: var(--accent-soft);
    color: var(--accent-text);
  }
  100% {
    background-color: transparent;
    color: inherit;
    transform: scale(1);
  }
}
.center-title.title-glow {
  animation: titleGlow 1.8s var(--ease-out);
  border-radius: 4px;
  padding: 0 4px;
}

/* ==========================================================================
   全屏预览（升级版 Lightbox）
   ========================================================================== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: rgba(8, 8, 10, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  box-sizing: border-box;
  animation: fade-in 160ms ease-out;
}
.lightbox.is-open {
  display: flex;
}
.lightbox-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 92vw;
  max-height: 94vh;
  gap: 12px;
}
.lightbox-image-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  min-height: 0;
}
.lightbox img {
  max-width: 90vw;
  max-height: 76vh;
  border-radius: var(--radius-md);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.65);
  object-fit: contain;
  user-select: none;
}
.lightbox-meta {
  width: 100%;
  max-width: 680px;
  background: rgba(26, 27, 30, 0.88);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: #eee;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-sizing: border-box;
}
.lightbox-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.lightbox-title-left {
  display: flex;
  align-items: center;
  gap: 8px;
}
.lightbox-counter {
  font-size: 11px;
  font-family: var(--font-mono);
  color: #9da0a8;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 7px;
  border-radius: 99px;
  line-height: 16px;
}
.lightbox-param-badge {
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 500;
  color: #a7f3d0;
  background: rgba(16, 185, 129, 0.16);
  padding: 2px 7px;
  border-radius: 4px;
  line-height: 16px;
  letter-spacing: 0.02em;
}
#lightbox-fav-btn.is-active {
  color: #f59e0b;
  border-color: rgba(245, 158, 11, 0.45);
  background: rgba(245, 158, 11, 0.15);
}
#lightbox-fav-btn.is-active svg {
  fill: #f59e0b;
}
.lightbox-nav-btn {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #fff;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: all var(--dur-fast);
  z-index: 10;
  padding: 0;
  user-select: none;
}
.lightbox-nav-btn:hover {
  background: rgba(255, 255, 255, 0.28);
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-50%) scale(1.08);
}
.lightbox-nav-btn:active {
  transform: translateY(-50%) scale(0.96);
}
.lightbox-nav-btn svg {
  width: 22px;
  height: 22px;
}
.lightbox-prev {
  left: 24px;
}
.lightbox-next {
  right: 24px;
}
.lightbox-nav-btn.is-disabled {
  opacity: 0.2;
  cursor: not-allowed;
  pointer-events: none;
}
@media (max-width: 900px) {
  .lightbox-nav-btn {
    width: 38px;
    height: 38px;
  }
  .lightbox-prev { left: 10px; }
  .lightbox-next { right: 10px; }
}
.lightbox-thread-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: var(--fw-semibold);
  color: #7fc0ae;
  background: rgba(78, 144, 128, 0.2);
  padding: 2px 8px;
  border-radius: 4px;
}
.lightbox-time {
  font-size: 11px;
  color: #999;
}
.lightbox-prompt {
  font-size: 12px;
  line-height: 1.5;
  color: #ddd;
  margin: 0;
  max-height: 54px;
  overflow-y: auto;
  word-break: break-word;
}
.lightbox-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 4px;
}
.lightbox-close {
  position: fixed;
  top: 20px;
  right: 22px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-size: 22px;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background-color var(--dur-fast);
  border: none;
  z-index: 10;
}
.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* ==========================================================================
   响应式（移动端优化，全面适配 iPhone / Android 竖屏与横屏）
   ========================================================================== */
.mobile-gallery-toggle {
  display: none;
}
.center-title-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

@media (max-width: 1366px) {
  :root { --left-w: 268px; --right-w: 236px; }
}
@media (max-width: 1120px) {
  .workbench { grid-template-columns: var(--left-w) 1fr 46px; }
  .col-gallery .gallery-header,
  .col-gallery .gallery-scroll { display: none; }
  .col-gallery .collapsed-strip { display: flex; }
}
@media (max-width: 900px) {
  :root { --left-w: 100%; }
  .workbench { display: flex; flex-direction: column; height: calc(100vh - var(--header-h)); position: relative; }
  .col-sidebar {
    position: fixed;
    inset: var(--header-h) auto 0 0;
    width: 290px;
    z-index: var(--z-modal);
    transform: translateX(-100%);
    transition: transform var(--dur-base) var(--ease-out);
    box-shadow: var(--shadow-lg);
    background: var(--bg-surface);
  }
  .col-sidebar.is-open { transform: translateX(0); }

  /* 移动端画廊抽屉化 */
  .col-gallery {
    display: flex;
    position: fixed;
    inset: var(--header-h) 0 0 auto;
    width: min(340px, 86vw);
    z-index: var(--z-modal);
    transform: translateX(100%);
    transition: transform var(--dur-base) var(--ease-out);
    box-shadow: var(--shadow-lg);
    border-left: 1px solid var(--border-subtle);
  }
  .col-gallery.is-open {
    transform: translateX(0);
  }
  .col-gallery .collapsed-strip { display: none !important; }
  .col-gallery .gallery-header,
  .col-gallery .gallery-scroll { display: flex; }
  .col-gallery .gallery-scroll {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: max-content;
    gap: 8px;
  }

  .mobile-gallery-toggle {
    display: inline-flex !important;
  }
  #toggle-gallery-btn {
    display: none;
  }

  .starter-grid { grid-template-columns: 1fr; }

  /* 消除画廊图片上方覆盖的标题标签条，纯粹呈现高清作品 */
  .gallery-thread-tag {
    display: none !important;
  }

  /* 底部 Prompt 输入框移动端沉底紧凑适配 */
  .composer-wrap {
    padding: 0 var(--sp-2) calc(var(--sp-2) + env(safe-area-inset-bottom, 0px));
  }
  .composer {
    border-radius: var(--radius-lg);
  }
  .composer-toolbar {
    padding: 4px 6px 6px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4px;
  }
  .composer-tools {
    display: flex;
    align-items: center;
    gap: 4px;
    overflow-x: auto;
    max-width: 100%;
    padding-bottom: 2px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .composer-tools::-webkit-scrollbar {
    display: none;
  }
  .composer-tools > * {
    flex-shrink: 0 !important;
  }
  .composer-hint {
    display: none;
  }

  /* 移动端工具按钮自适应尺寸：保证 素材、模型、比例、大小 4 个控件在小屏上一眼全显，不发生位移或截断 */
  .tool-btn {
    height: 28px;
    padding: 0 7px;
    gap: 4px;
    font-size: 11.5px;
    flex-shrink: 0;
  }
  .cpicker-trigger {
    height: 28px;
    padding: 0 6px;
    gap: 3px;
    font-size: 11.5px;
    flex-shrink: 0;
  }
  .cpicker-lead {
    width: 13px;
    height: 13px;
  }
  .cpicker-caret {
    width: 9px;
    height: 9px;
  }
  #model-picker .cpicker-label {
    max-width: 82px;
  }
  #ratio-picker .cpicker-label,
  #size-picker .cpicker-label {
    max-width: 44px;
  }

  /* 移动端参数下拉菜单悬浮抽屉化：彻底脱离父级 overflow 剪裁，零遮挡 */
  .cpicker-panel {
    position: fixed !important;
    bottom: 80px !important;
    left: 12px !important;
    right: 12px !important;
    width: auto !important;
    min-width: 0 !important;
    max-width: calc(100vw - 24px) !important;
    z-index: 99999 !important;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35) !important;
    border: 1px solid var(--border-strong) !important;
    background: var(--bg-surface) !important;
  }
  .cpicker-panel.is-grid {
    width: auto !important;
  }
  .cpicker-grid {
    grid-template-columns: repeat(4, 1fr) !important;
    gap: 6px !important;
  }

  .cpicker-btn {
    padding: 3px 6px;
    font-size: 11px;
  }
  .mobile-menu-btn { display: inline-flex !important; }

  /* Lightbox 移动端内边距与元数据面板 */
  .lightbox {
    padding: 12px;
  }
  .lightbox-content {
    max-width: 100vw;
    max-height: 96vh;
    gap: 8px;
  }
  .lightbox img {
    max-width: 96vw;
    max-height: 60vh;
  }
  .lightbox-meta {
    padding: 10px 12px;
  }
  .lightbox-actions {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 400px) {
  #model-picker .cpicker-label {
    max-width: 66px;
  }
  .tool-btn {
    padding: 0 5px;
  }
}
.mobile-menu-btn { display: none; }