Blame for css/overlay.css

/* 划词浮层：Warm Paper 毛玻璃卡片（颜色一律走 theme.css 令牌）。
   注意：透明原生窗口上 WebKit 的 backdrop-filter 会把元素整个画没（坑位实测记录 #1），
   所以模糊交给 macOS 窗口特效，CSS 只保留 85% 暖纸半透明底色。 */

/* 透明窗口本体：桌面要从圆角外透出来 */
body.overlay-surface {
  background: transparent;
}

.overlay-root {
  height: 100%;
  display: flex;
  padding: 12px;
  box-sizing: border-box;
}

/* ---------- 卡片容器 ---------- */
.overlay-card {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-float);
  background: var(--glass);
  box-shadow: var(--shadow-float);
  animation: overlay-in 180ms var(--ease);
}

@keyframes overlay-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 顶栏 ---------- */
.overlay-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px 8px;
}

.overlay-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.overlay-esc {
  font-size: 12px;
  color: var(--text-tertiary);
  white-space: nowrap;
}

/* ---------- 空态 / 提示 ---------- */
.overlay-note {
  margin: 0;
  padding: 12px 20px 20px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.overlay-note.is-warn {
  color: var(--warning);
}

/* ---------- 选中文字预览 ---------- */
.overlay-quote {
  margin: 4px 20px 0;
  padding: 10px 14px;
  max-height: 120px;
  overflow-y: auto;
  border-left: 2px solid var(--accent-soft);
  border-radius: 0 var(--radius-control) var(--radius-control) 0;
  background: var(--bg-sunken);
  color: var(--text);
  font-size: 13.5px;
  line-height: 1.6;
  user-select: text;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ---------- 动作 chips ---------- */
.overlay-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 20px 4px;
}

.overlay-chip {
  height: 30px;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.overlay-chip:hover:not(:disabled) {
  background: var(--accent-soft);
  border-color: var(--accent-soft);
  color: var(--text);
}

.overlay-chip:disabled {
  opacity: 0.5;
  cursor: default;
}

/* ---------- 自定义输入 ---------- */
.overlay-custom {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 20px 0;
  padding: 6px 6px 6px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  background: var(--bg-sunken);
  transition: border-color var(--dur) var(--ease);
}

.overlay-custom:focus-within {
  border-color: var(--accent);
}

.overlay-input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 13.5px;
  outline: none;
  cursor: text;
}

.overlay-input::placeholder {
  color: var(--text-tertiary);
}

.overlay-send {
  flex-shrink: 0;
  height: 28px;
  padding: 0 12px;
  border: none;
  border-radius: var(--radius-chip);
  background: var(--accent);
  color: var(--bg);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: opacity var(--dur) var(--ease);
}

.overlay-send:disabled {
  opacity: 0.4;
  cursor: default;
}

/* ---------- 回答区 ---------- */
.overlay-answer {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  margin-top: 12px;
  padding: 12px 20px 16px;
  border-top: 1px solid var(--border);
}

.overlay-answer-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
}

.overlay-answer-text {
  margin: 0;
  color: var(--text);
  font-size: 13.5px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
  user-select: text;
}

/* 流式呼吸光标（1s 透明度呼吸；reduced-motion 时 theme.css 全局降级为静止） */
.overlay-cursor {
  display: inline-block;
  width: 2px;
  height: 1.05em;
  margin-left: 3px;
  border-radius: 1px;
  background: var(--accent);
  vertical-align: text-bottom;
  animation: overlay-cursor-breathe 1s ease-in-out infinite;
}

@keyframes overlay-cursor-breathe {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.15;
  }
}

.overlay-error {
  margin: 8px 0 0;
  color: var(--danger);
  font-size: 12.5px;
}

.overlay-answer-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
}

.overlay-copy {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 12.5px;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease);
}

.overlay-copy:hover:not(:disabled) {
  background: var(--bg-elevated);
  color: var(--text);
}

.overlay-copy:disabled {
  opacity: 0.5;
  cursor: default;
}

.overlay-foot-hint {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* ---------- 授权引导态 ---------- */
.overlay-guide {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 24px 24px 20px;
}

.overlay-guide-head {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
}

.overlay-guide .overlay-title {
  font-size: 22px;
}

.overlay-lead {
  margin: 12px 0 20px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.65;
}

.overlay-primary {
  align-self: flex-start;
  height: 40px;
  padding: 0 20px;
  border: none;
  border-radius: var(--radius-control);
  background: var(--accent);
  color: var(--bg);
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
}

.overlay-primary:hover {
  filter: brightness(0.94);
}

.overlay-why-toggle {
  align-self: flex-start;
  margin-top: 18px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 13px;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

.overlay-why-body {
  margin: 10px 0 0;
  color: var(--text-tertiary);
  font-size: 12.5px;
  line-height: 1.7;
}

.overlay-guide-hint {
  margin-top: auto;
  padding-top: 20px;
  color: var(--text-tertiary);
  font-size: 12.5px;
  line-height: 1.6;
}