/* Trace design kit — component styles. 所有颜色/尺寸取自 ../tokens.css */

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font: 13px/1.4 var(--trace-font-ui);
  color: var(--trace-label);
  -webkit-font-smoothing: antialiased;
}
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: default; }
.ic { display: inline-block; flex: none; vertical-align: middle; }

/* ============================ 文档页（screens/*.html 外壳） ============================ */
body.doc { background: #d9d8d4; min-height: 100vh; }
body.doc[data-doc-theme="dark"] { background: #0e0e0f; color: rgba(255,255,255,.86); }
.doc-head { max-width: 1480px; margin: 0 auto; padding: 32px 40px 8px; display: flex; gap: 24px; align-items: flex-end; flex-wrap: wrap; }
.doc-head h1 { font: 600 22px/1.2 var(--trace-font-ui); margin: 0 0 6px; letter-spacing: -.01em; }
.doc-head p { margin: 0; max-width: 820px; color: rgba(0,0,0,.6); font-size: 13px; line-height: 1.6; }
body.doc[data-doc-theme="dark"] .doc-head p { color: rgba(255,255,255,.55); }
.doc-head .grow { flex: 1; }
.doc-nav { display: flex; gap: 6px; flex-wrap: wrap; }
.doc-nav a, .doc-nav button {
  font-size: 12px; color: inherit; text-decoration: none; padding: 4px 10px; border-radius: 6px;
  background: rgba(255,255,255,.55); border: .5px solid rgba(0,0,0,.12);
}
body.doc[data-doc-theme="dark"] .doc-nav a, body.doc[data-doc-theme="dark"] .doc-nav button { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.12); }
.doc-nav .on { background: #1d1d1f; color: #fff; }
.doc-body { max-width: 1480px; margin: 0 auto; padding: 8px 40px 80px; }
.frame { margin: 36px 0 0; }
.frame-cap { display: flex; align-items: baseline; gap: 10px; margin: 0 0 12px; flex-wrap: wrap; }
.frame-cap h2 { font: 600 15px/1.3 var(--trace-font-ui); margin: 0; }
.frame-cap .sub { font-size: 12px; opacity: .6; }
.frame-cap .tag { font-size: 10.5px; font-weight: 600; padding: 1px 6px; border-radius: 4px; border: .5px solid currentColor; opacity: .7; }
.frame-cap .tag.new { color: #a2513e; opacity: 1; }
.frame-stage { position: relative; transform-origin: 0 0; }
.frame-scaler { position: relative; }
.frame-notes { margin: 12px 0 0; padding: 0; list-style: none; columns: 2; column-gap: 32px; font-size: 12px; line-height: 1.55; opacity: .78; max-width: 1400px; }
.frame-notes li { break-inside: avoid; margin: 0 0 6px; padding-left: 22px; position: relative; }
.frame-notes li b { font-weight: 600; }
.frame-notes .pin { position: absolute; left: 0; top: 1px; }
.pin { width: 16px; height: 16px; border-radius: 50%; background: #a2513e; color: #fff; font: 600 10px/16px var(--trace-font-ui); text-align: center; }
.pin-abs { position: absolute; z-index: 90; box-shadow: 0 0 0 2px #fff; pointer-events: none; }
body.solo .pin-abs { display: none; }
body.solo { background: transparent; }
body.solo .doc-head, body.solo .frame-cap, body.solo .frame-notes { display: none; }
body.solo .doc-body { padding: 0; margin: 0; max-width: none; }
body.solo .frame { margin: 0; }
body.solo .win { border-radius: 0; box-shadow: none; }

/* ============================ macOS 窗口 ============================ */
.win {
  position: relative; overflow: hidden; border-radius: var(--trace-radius-window);
  background: var(--trace-window); color: var(--trace-label);
  box-shadow: var(--trace-window-shadow);
  display: flex; flex-direction: column;
  font: 13px/1.4 var(--trace-font-ui);
}
.win-tb {
  flex: none; height: 52px; display: flex; align-items: center; gap: 8px;
  padding: 0 12px 0 84px; background: var(--trace-toolbar);
  border-bottom: .5px solid var(--trace-separator); position: relative; z-index: 5;
}
.win-tb.has-sidebar-split { padding-left: 0; }
.lights { position: absolute; left: 20px; top: 20px; display: flex; gap: 8px; z-index: 6; }
.lights i { width: 12px; height: 12px; border-radius: 50%; box-shadow: inset 0 0 0 .5px rgba(0,0,0,.18); }
.lights i:nth-child(1) { background: #ff5f57; }
.lights i:nth-child(2) { background: #febc2e; }
.lights i:nth-child(3) { background: #28c840; }
.win.inactive .lights i { background: var(--trace-label-quaternary); box-shadow: none; }
.win-body { flex: 1; display: flex; min-height: 0; position: relative; }

.tb-title { display: flex; flex-direction: column; justify-content: center; min-width: 0; line-height: 1.2; }
.tb-title b { font-weight: 600; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tb-title span { font-size: 11px; color: var(--trace-label-secondary); white-space: nowrap; }
.tb-spacer { flex: 1; }
.tb-btn {
  height: 28px; min-width: 28px; padding: 0 5px; border-radius: var(--trace-radius-control);
  display: inline-flex; align-items: center; justify-content: center; gap: 4px;
  color: var(--trace-label-secondary);
}
.tb-btn:hover, .tb-btn.hover { background: var(--trace-fill); color: var(--trace-label); }
.tb-btn.on { color: var(--trace-accent); background: var(--trace-fill); }
.tb-btn:disabled, .tb-btn.disabled { color: var(--trace-label-quaternary); }
.tb-btn.text { padding: 0 8px; font-size: 12px; color: var(--trace-label); }
.tb-group {
  display: inline-flex; align-items: center; height: 30px; padding: 0 1px; border-radius: 8px;
  background: var(--trace-content); box-shadow: 0 0 0 .5px var(--trace-separator-strong), 0 .5px 1px rgba(0,0,0,.05);
}
.tb-group .tb-btn { height: 28px; }
.tb-group .div { width: .5px; height: 16px; background: var(--trace-separator-strong); margin: 0 1px; }
.page-field { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--trace-label-secondary); padding: 0 6px; font-variant-numeric: tabular-nums; }
.page-field input, .page-field .inp {
  width: 34px; height: 20px; border-radius: 5px; text-align: center; font: 12px var(--trace-font-ui);
  color: var(--trace-label); background: var(--trace-fill); border: 0; line-height: 20px; outline: none;
}
.kbd { display: inline-flex; align-items: center; justify-content: center; gap: 1px; min-width: 18px; height: 18px; padding: 0 4px; border-radius: 4px; font: 11px/1 var(--trace-font-ui); color: var(--trace-label-secondary); background: var(--trace-fill); box-shadow: inset 0 -.5px 0 var(--trace-separator-strong); }
.kbd-plain { font: 12px var(--trace-font-ui); color: var(--trace-label-tertiary); letter-spacing: .04em; }

/* segmented control */
.seg { display: inline-flex; padding: 2px; gap: 2px; border-radius: 7px; background: var(--trace-fill-pressed); height: 24px; align-items: stretch; }
.seg > * { padding: 0 10px; border-radius: 5px; font-size: 12px; display: inline-flex; align-items: center; gap: 4px; color: var(--trace-label-secondary); white-space: nowrap; }
.seg > .on { background: var(--trace-content); color: var(--trace-label); box-shadow: 0 0 0 .5px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.12); }
[data-theme="dark"] .seg > .on { background: rgba(255,255,255,.18); box-shadow: none; }
.seg.small { height: 22px; }
.seg.small > * { padding: 0 8px; font-size: 11px; }
.seg.icons > * { padding: 0 6px; }

/* status pill in toolbar (OCR) */
.ocr-state { display: inline-flex; align-items: center; gap: 5px; font-size: 11px; color: var(--trace-label-secondary); padding: 0 4px; }
.ocr-state i { width: 6px; height: 6px; border-radius: 50%; background: var(--trace-label-tertiary); }
.ocr-state.on i { background: var(--trace-positive); }
.ocr-state.busy i { background: var(--trace-accent); }
.ocr-state.fail i { background: var(--trace-negative); }

/* ============================ Sidebar ============================ */
.sidebar { flex: none; width: 244px; background: var(--trace-sidebar); border-right: .5px solid var(--trace-separator); display: flex; flex-direction: column; min-height: 0; }
.sidebar .sb-pad { padding: 10px 10px 0; }
.sb-section { font-size: 11px; font-weight: 600; color: var(--trace-label-tertiary); padding: 14px 10px 4px; }
.sb-row { height: 28px; margin: 0 10px; padding: 0 8px; display: flex; align-items: center; gap: 8px; border-radius: var(--trace-radius-control); font-size: 13px; color: var(--trace-label); white-space: nowrap; }
.sb-row .ic { color: var(--trace-accent); }
.sb-row .cnt { margin-left: auto; font-size: 11px; color: var(--trace-label-tertiary); font-variant-numeric: tabular-nums; }
.sb-row.sel { background: var(--trace-fill-selected); }
.sb-row.drop { box-shadow: inset 0 0 0 1.5px var(--trace-accent); background: color-mix(in srgb, var(--trace-accent) 10%, transparent); }
.sb-row .edit { border-radius: 4px; box-shadow: 0 0 0 2px var(--trace-focus-ring); background: var(--trace-content); padding: 0 4px; margin-left: -4px; }
.sb-scroll { flex: 1; overflow: hidden; min-height: 0; }
.sb-foot { height: 36px; flex: none; display: flex; align-items: center; padding: 0 10px; gap: 4px; border-top: .5px solid var(--trace-separator); }

/* reader sidebar tabs & lists */
.sb-tabs { padding: 10px 12px 8px; }
.sb-tabs .seg { width: 100%; }
.sb-tabs .seg > * { flex: 1; justify-content: center; }
.toc-row { display: flex; align-items: baseline; gap: 8px; padding: 5px 20px 5px calc(20px + var(--lvl, 0) * 14px); font-size: 12.5px; color: var(--trace-label); }
.toc-row .tn { margin-left: auto; font-size: 11px; color: var(--trace-label-tertiary); font-variant-numeric: tabular-nums; }
.toc-row.cur { background: var(--trace-fill-selected); margin: 0 8px; padding-left: calc(12px + var(--lvl, 0) * 14px); padding-right: 12px; border-radius: 6px; }
.toc-row.sec { color: var(--trace-label-secondary); }
.thumbs { display: flex; flex-direction: column; align-items: center; gap: 14px; padding: 6px 0 16px; }
.thumb { position: relative; display: flex; flex-direction: column; align-items: center; gap: 5px; font-size: 11px; color: var(--trace-label-secondary); font-variant-numeric: tabular-nums; }
.thumb .t { position: relative; border-radius: 2px; overflow: hidden; background: #fff; box-shadow: var(--trace-cover-shadow); }
.thumb.cur .t { box-shadow: 0 0 0 2.5px var(--trace-accent); }
.thumb.cur .num { color: var(--trace-accent); font-weight: 600; }
.thumb .mk { position: absolute; top: 4px; right: 4px; width: 14px; height: 14px; border-radius: 3px; background: var(--trace-content); color: var(--trace-graphite); display: flex; align-items: center; justify-content: center; box-shadow: 0 0 0 .5px var(--trace-separator-strong); }
.thumb .ring { position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%); }
.marks-list { padding: 0 0 16px; }
.marks-pg { font-size: 11px; font-weight: 600; color: var(--trace-label-tertiary); padding: 12px 20px 4px; display: flex; justify-content: space-between; }
.mark-row { display: grid; grid-template-columns: 16px 1fr; gap: 2px 8px; padding: 6px 12px 7px 16px; margin: 0 8px; border-radius: 6px; }
.mark-row .ic { color: var(--trace-graphite); margin-top: 2px; }
.mark-row .src { font: 12.5px/1.35 var(--trace-font-headword); color: var(--trace-label-secondary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.mark-row .src b { color: var(--trace-label); font-weight: 600; }
.mark-row .gl { grid-column: 2; font: 12px/1.4 var(--trace-font-zh); color: var(--trace-label-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mark-row.sel { background: var(--trace-fill-selected); }
.mark-row.sel .gl { color: var(--trace-label); }

/* ============================ Reader canvas & PDF page ============================ */
.canvas { position: relative; flex: 1; min-width: 0; background: var(--trace-canvas); overflow: hidden; }
.canvas-scroll { position: absolute; inset: 0; overflow: hidden; }
.canvas-scroll.live { overflow-y: auto; overflow-x: hidden; scrollbar-width: thin; }
.canvas-content { position: relative; display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 16px 0 40px; }
.ov-layer { position: absolute; inset: 0; pointer-events: none; overflow: hidden; z-index: 20; }
.ov-layer > * { pointer-events: auto; }

.page-wrap { position: relative; flex: none; box-shadow: var(--trace-page-shadow); }
.pg { position: absolute; left: 0; top: 0; transform-origin: 0 0; overflow: hidden; background: var(--paper, #fff); color: #1c1b19; }
.pg .w { cursor: text; }
.pg p { margin: 0; }
.pg .bl { display: inline-block; width: 0; height: 0; vertical-align: baseline; }
.page-wrap[data-appearance="dim"] .pg { filter: brightness(.8) sepia(.12); }
.page-wrap[data-appearance="invert"] .pg { filter: invert(.92) hue-rotate(180deg); }
.page-wrap[data-appearance="invert"] .pg .keep-color { filter: invert(1) hue-rotate(180deg) brightness(.92); }
.page-wrap[data-appearance="invert"] { box-shadow: 0 0 0 .5px rgba(255,255,255,.08); }

/* trace layer */
.tl { position: absolute; inset: 0; pointer-events: none; }
.tl-hl { position: absolute; background: var(--trace-hl-citron); mix-blend-mode: var(--trace-hl-blend); border-radius: 1.5px; }
.tl-ul { position: absolute; height: 5px; overflow: visible; color: var(--trace-ink); opacity: var(--trace-ink-opacity); }
.tl-ul svg, .tl-mm svg { position: absolute; left: 0; top: 0; overflow: visible; }
.tl-mm { position: absolute; color: var(--trace-ink); opacity: var(--trace-margin-opacity); }
.tl-rd { position: absolute; width: var(--trace-reunion-size); height: var(--trace-reunion-size); border-radius: 50%; background: var(--trace-ink); opacity: var(--trace-reunion-opacity); }
.tl .hover, .tl .is-hover { opacity: var(--trace-ink-hover-opacity); }
.tl-ul.is-hover line { stroke-width: 1.5; }
.tl .dim { opacity: .28; }
.tl-note { position: absolute; width: 5px; height: 5px; border-radius: 50%; border: 1.1px solid var(--trace-ink); opacity: var(--trace-ink-opacity); }
.tl-flash { animation: trace-flash var(--trace-dur-flash) linear 1; }
@keyframes trace-flash { 0%,50%,100% { opacity: 1; } 25%,75% { opacity: .4; } }

/* selection & press feedback */
.sel-layer { position: absolute; inset: 0; pointer-events: none; }
.sel-rect { position: absolute; background: var(--trace-selection); mix-blend-mode: var(--trace-selection-blend); }
[data-paper="dark"] .sel-rect { mix-blend-mode: screen; }
.sel-handle { position: absolute; width: 10px; pointer-events: auto; }
.sel-handle i { position: absolute; width: var(--trace-handle-knob); height: var(--trace-handle-knob); border-radius: 50%; background: var(--trace-selection-handle); box-shadow: 0 0 0 1.5px #fff, 0 1px 2px rgba(0,0,0,.25); }
.sel-handle b { position: absolute; width: var(--trace-handle-stem); background: var(--trace-selection-handle); border-radius: 1px; }
.sel-handle.pressed i { transform: scale(.85); filter: brightness(.82); }
.sel-handle.pressed b { filter: brightness(.82); }
.loupe { position: absolute; width: 132px; height: 44px; border-radius: 22px; overflow: hidden; background: #fff; box-shadow: 0 0 0 .5px rgba(0,0,0,.2), 0 6px 16px -4px rgba(0,0,0,.3); z-index: 30; }
.loupe-inner { position: absolute; transform-origin: 0 0; }
.loupe .cursor { position: absolute; left: 50%; top: 8px; bottom: 8px; width: 2px; background: var(--trace-selection-handle); border-radius: 1px; }

/* ============================ Overlay（助手浮层 / Hover / 操作条） ============================ */
.ov {
  position: absolute; width: var(--trace-overlay-width); background: var(--trace-overlay-bg);
  border-radius: var(--trace-radius-overlay); box-shadow: var(--trace-overlay-shadow);
  outline: .5px solid var(--trace-overlay-border); outline-offset: -.5px;
  color: var(--trace-label); font-family: var(--trace-font-ui); z-index: 25;
  display: flex; flex-direction: column;
}
.ov.dragging { box-shadow: var(--trace-overlay-shadow-drag); }
.ov-grip { height: var(--trace-overlay-grip-area); display: flex; align-items: center; justify-content: center; flex: none; }
.ov-grip i { width: 32px; height: 3px; border-radius: 2px; background: var(--trace-grip); }
.ov-head { display: flex; align-items: flex-start; gap: 8px; padding: 0 12px 0 var(--trace-overlay-pad-x); min-height: 26px; }
.ov-hw { flex: 1; min-width: 0; font: 600 var(--trace-type-headword)/24px var(--trace-font-headword); letter-spacing: -.005em; color: var(--trace-label); overflow-wrap: anywhere; }
.ov-kicker { flex: 1; font-size: var(--trace-type-meta); color: var(--trace-label-secondary); line-height: 24px; display: flex; align-items: center; gap: 6px; }
.ov-star { width: 26px; height: 26px; margin: -1px -4px 0 0; border-radius: 6px; display: flex; align-items: center; justify-content: center; color: var(--trace-label-secondary); flex: none; }
.ov-star:hover { background: var(--trace-fill); color: var(--trace-label); }
.ov-star.saved { color: var(--trace-ink, var(--trace-graphite)); }
.ov-star.disabled { color: var(--trace-label-quaternary); }
.ov-star.pop .ic { animation: star-pop var(--trace-dur-star) var(--trace-ease-settle); }
@keyframes star-pop { 0% { transform: scale(1.12); } 100% { transform: scale(1); } }
.ov-meta { display: flex; align-items: center; gap: 8px; padding: 2px var(--trace-overlay-pad-x) 0; min-height: 22px; font-size: var(--trace-type-meta); color: var(--trace-label-secondary); }
.ov-ipa { font: var(--trace-type-ipa)/20px var(--trace-font-ipa); color: var(--trace-label-secondary); padding: 0 5px; margin-left: -5px; border-radius: 5px; display: inline-flex; align-items: center; gap: 4px; }
.ov-ipa:hover, .ov-ipa.hover { background: var(--trace-fill); color: var(--trace-label); }
.ov-ipa.playing { color: var(--trace-accent); }
.ov-ipa.failed { color: var(--trace-negative); }
.ov-ipa .ic { opacity: 0; margin-left: -2px; }
.ov-ipa:hover .ic, .ov-ipa.hover .ic, .ov-ipa.playing .ic, .ov-ipa.failed .ic, .ov-ipa.loading .ic { opacity: 1; }
.ov-ipa .spin { width: 10px; height: 10px; border-radius: 50%; border: 1.25px solid currentColor; border-right-color: transparent; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.ov-pos { font-style: italic; font-family: var(--trace-font-headword); font-size: 12px; }
.ov-lemma { color: var(--trace-label-tertiary); }
.ov-sep { height: .5px; background: var(--trace-separator); margin: 8px var(--trace-overlay-pad-x) 0; flex: none; }
.ov-body { padding: 8px var(--trace-overlay-pad-x) var(--trace-overlay-pad-bottom); position: relative; }
.ov-body.scroll { max-height: calc(var(--trace-leading-body) * 8 + 20px); overflow: hidden; }
.ov-body.scroll::after { content: ""; position: absolute; left: 0; right: 10px; bottom: 0; height: 28px; background: linear-gradient(to bottom, transparent, var(--trace-overlay-bg)); }
.ov-scrollbar { position: absolute; right: 3px; top: 10px; width: 5px; height: 58px; border-radius: 3px; background: var(--trace-label-quaternary); }
.ov-def { font: var(--trace-type-body)/var(--trace-leading-body) var(--trace-font-zh); color: var(--trace-label); margin: 0; }
.ov-ctx { font: var(--trace-type-context)/var(--trace-leading-context) var(--trace-font-zh); color: var(--trace-label-secondary); margin: var(--trace-context-gap) 0 0; }
.ov-trans { font: var(--trace-type-body)/var(--trace-leading-body) var(--trace-font-zh); margin: 0; }
.ov-tabs { position: relative; display: flex; height: var(--trace-overlay-tabbar); border-top: .5px solid var(--trace-separator); padding: 0 8px; flex: none; }
.ov-tab { flex: 1; display: flex; align-items: center; justify-content: center; gap: 4px; font-size: var(--trace-type-meta); color: var(--trace-label-secondary); position: relative; }
.ov-tab:hover { color: var(--trace-label); }
.ov-tab.on { color: var(--trace-label); font-weight: 600; }
.ov-tab .dot { width: 4px; height: 4px; border-radius: 50%; background: currentColor; opacity: .55; }
.ov-tab .k { font-size: 10px; color: var(--trace-label-quaternary); font-weight: 400; }
.ov-ind { position: absolute; top: -.5px; height: 1.5px; background: var(--trace-label); border-radius: 1px; transition: left var(--trace-dur-tab-indicator) var(--trace-ease-standard), width var(--trace-dur-tab-indicator) var(--trace-ease-standard); }
.ov-foot-status { font-size: 11px; color: var(--trace-label-tertiary); display: flex; gap: 6px; align-items: center; }

/* skeleton */
.sk { display: block; height: 10px; border-radius: 4px; background: var(--trace-skeleton); position: relative; overflow: hidden; }
.sk.anim::after { content: ""; position: absolute; inset: 0; transform: translateX(-100%); background: linear-gradient(90deg, transparent, var(--trace-skeleton-sheen), transparent); animation: sheen var(--trace-dur-skeleton-loop) linear infinite; }
@keyframes sheen { to { transform: translateX(100%); } }
.fade-in { animation: fade-in var(--trace-dur-stream-segment) linear both; }
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
.stream-caret { display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: var(--trace-label-tertiary); margin-left: 3px; vertical-align: middle; }

/* explain chips */
.chip { display: inline-flex; align-items: center; height: 20px; padding: 0 7px; margin: 0 1px; border-radius: 5px; font: 12.5px/1 var(--trace-font-headword); color: var(--trace-label); background: var(--trace-surface-sunken); box-shadow: inset 0 0 0 .5px var(--trace-separator-strong); vertical-align: 1px; }
.chip:hover, .chip.hover { box-shadow: inset 0 0 0 1px var(--trace-graphite); }
.inline-en { font-family: var(--trace-font-headword); font-style: italic; }

/* error / unconfigured */
.ov-msg { display: flex; gap: 8px; align-items: flex-start; font: 13px/20px var(--trace-font-zh); }
.ov-msg .ic { margin-top: 2px; color: var(--trace-caution); }
.ov-msg small { display: block; font-size: 12px; line-height: 18px; color: var(--trace-label-secondary); margin-top: 2px; }
.ov-actions { display: flex; gap: 8px; margin-top: 10px; padding-left: 24px; }
.btn { height: 24px; padding: 0 10px; border-radius: var(--trace-radius-control); font-size: 12px; display: inline-flex; align-items: center; gap: 5px; background: var(--trace-content); box-shadow: 0 0 0 .5px var(--trace-separator-strong), 0 .5px 1px rgba(0,0,0,.06); color: var(--trace-label); white-space: nowrap; }
[data-theme="dark"] .btn { background: rgba(255,255,255,.12); box-shadow: none; }
.btn.primary { background: var(--trace-accent); color: var(--trace-accent-fg); box-shadow: none; }
.btn.link { background: none; box-shadow: none; color: var(--trace-accent); padding: 0; }
.btn.lg { height: 28px; padding: 0 14px; font-size: 13px; }
.btn.xl { height: 32px; padding: 0 18px; font-size: 13px; }

/* note */
.note-box { min-height: 88px; border-radius: 6px; background: var(--trace-surface-sunken); box-shadow: inset 0 0 0 .5px var(--trace-separator-strong); padding: 8px 10px; font: 13px/20px var(--trace-font-zh); color: var(--trace-label); }
.note-box.focus { box-shadow: 0 0 0 3px var(--trace-focus-ring), inset 0 0 0 .5px var(--trace-accent); background: var(--trace-overlay-bg); }
.note-box .caret { display: inline-block; width: 1.5px; height: 15px; background: var(--trace-accent); vertical-align: -2px; margin-left: 1px; }
.note-box .ph { color: var(--trace-label-tertiary); }
.note-status { height: 18px; margin-top: 6px; font-size: 11px; color: var(--trace-label-tertiary); display: flex; justify-content: space-between; }

/* hover preview */
.ov.pv { pointer-events: none; }
.pv-meta { display: flex; align-items: center; gap: 6px; padding: 10px var(--trace-overlay-pad-x) 0; font-size: var(--trace-type-meta); color: var(--trace-label-tertiary); }
.pv-meta .ic { color: var(--trace-graphite); }
.pv-head { display: flex; align-items: baseline; gap: 8px; padding: 4px var(--trace-overlay-pad-x) 0; flex-wrap: wrap; }
.pv-head .ov-hw { flex: none; font-size: 15px; line-height: 22px; }
.pv-head .ov-ipa { pointer-events: auto; font-size: 12px; }
.pv-src { padding: 4px var(--trace-overlay-pad-x) 0; font: italic 13px/19px var(--trace-font-headword); color: var(--trace-label-secondary); }
.pv-note { display: flex; gap: 6px; margin-top: 8px; padding-top: 8px; border-top: .5px solid var(--trace-separator); font: 12px/18px var(--trace-font-zh); color: var(--trace-label-secondary); }
.pv-note .ic { color: var(--trace-graphite); margin-top: 1px; }

/* selection action bar */
.ab { position: absolute; display: flex; align-items: stretch; height: 34px; padding: 0 4px; background: var(--trace-overlay-bg); border-radius: 8px; box-shadow: var(--trace-overlay-shadow); outline: .5px solid var(--trace-overlay-border); outline-offset: -.5px; z-index: 26; }
.ab-btn { display: flex; align-items: center; gap: 5px; padding: 0 9px; font-size: 12px; color: var(--trace-label); border-radius: 6px; margin: 3px 0; }
.ab-btn .ic { color: var(--trace-label-secondary); }
.ab-btn:hover, .ab-btn.hover { background: var(--trace-fill); }
.ab-btn.pressed { background: var(--trace-fill-pressed); }
.ab-sep { width: .5px; margin: 9px 2px; background: var(--trace-separator); }
.ab-hint { display: flex; align-items: center; padding: 0 8px 0 10px; font-size: 11px; color: var(--trace-label-secondary); border-right: .5px solid var(--trace-separator); margin: 7px 2px 7px 0; }
.ab-menu { position: absolute; width: 196px; padding: 5px; background: var(--trace-overlay-bg); border-radius: 8px; box-shadow: var(--trace-overlay-shadow); outline: .5px solid var(--trace-overlay-border); z-index: 27; }
.menu-item { height: 24px; padding: 0 8px; border-radius: 5px; display: flex; align-items: center; gap: 8px; font-size: 13px; }
.menu-item .ic { color: var(--trace-label-secondary); }
.menu-item .sc { margin-left: auto; font-size: 12px; color: var(--trace-label-tertiary); letter-spacing: .04em; }
.menu-item.hl { background: var(--trace-accent); color: #fff; }
.menu-item.hl .ic, .menu-item.hl .sc { color: rgba(255,255,255,.85); }
.menu-item.check::before { content: "✓"; width: 10px; font-size: 11px; margin-right: -2px; }
.menu-item.uncheck::before { content: ""; width: 10px; margin-right: -2px; }
.menu-sep { height: .5px; margin: 4px 8px; background: var(--trace-separator); }
.menu-title { font-size: 11px; color: var(--trace-label-tertiary); padding: 4px 8px 2px; font-weight: 600; }

/* toast（已适合宽度） */
.toast { position: absolute; left: 50%; transform: translateX(-50%); bottom: 22px; height: 28px; padding: 0 12px; border-radius: 8px; display: flex; align-items: center; gap: 6px; font-size: 12px; background: var(--trace-overlay-bg); box-shadow: var(--trace-overlay-shadow); outline: .5px solid var(--trace-overlay-border); color: var(--trace-label); z-index: 28; pointer-events: none; }
.toast .ic { color: var(--trace-label-secondary); }
.zoom-hud { position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%); min-width: 116px; height: 52px; padding: 0 20px; border-radius: 12px; background: var(--trace-overlay-bg); box-shadow: var(--trace-overlay-shadow); display: flex; align-items: center; justify-content: center; font: 600 20px var(--trace-font-ui); font-variant-numeric: tabular-nums; z-index: 28; }

/* ============================ Library ============================ */
.lib-main { flex: 1; min-width: 0; display: flex; flex-direction: column; background: var(--trace-content); position: relative; }
.lib-head { display: flex; align-items: center; gap: 12px; padding: 18px 28px 10px; }
.lib-head h1 { font: 600 20px/1.2 var(--trace-font-ui); margin: 0; letter-spacing: -.01em; }
.lib-head .sub { font-size: 12px; color: var(--trace-label-secondary); }
.lib-grid { display: grid; grid-template-columns: repeat(auto-fill, 148px); gap: 26px 24px; padding: 10px 28px 28px; justify-content: space-between; }
.card { display: flex; flex-direction: column; gap: 8px; position: relative; }
.cover { position: relative; width: 148px; height: 192px; border-radius: var(--trace-radius-thumb); overflow: hidden; box-shadow: var(--trace-cover-shadow); background: #fff; }
.cover::before { content: ""; position: absolute; inset: 3px; border: .5px solid rgba(0,0,0,.07); border-radius: 1px; pointer-events: none; z-index: 2; }
.cover-progress { position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: rgba(0,0,0,.08); z-index: 3; }
.cover-progress i { display: block; height: 100%; background: var(--trace-graphite); opacity: .85; }
.cover-badge { position: absolute; right: 6px; bottom: 8px; height: 17px; padding: 0 5px 0 3px; border-radius: 4px; display: flex; align-items: center; gap: 2px; font: 600 10px/1 var(--trace-font-ui); font-variant-numeric: tabular-nums; color: #4b5563; background: rgba(255,255,255,.94); box-shadow: 0 0 0 .5px rgba(0,0,0,.14); z-index: 3; }
.cover-badge svg { color: #5b6778; }
.card .ttl { font-size: 12.5px; font-weight: 500; line-height: 1.3; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card .meta { font-size: 11px; color: var(--trace-label-secondary); margin-top: -4px; font-variant-numeric: tabular-nums; }
.card.sel .cover { box-shadow: 0 0 0 3px var(--trace-accent), var(--trace-cover-shadow); }
.card.open-dot .ttl::before { content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--trace-accent); margin-right: 5px; vertical-align: 1px; }
.card .importing { position: absolute; inset: 0; background: rgba(255,255,255,.7); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; font-size: 11px; color: #555; z-index: 4; }
.lib-list { padding: 0 20px 20px; }
.lib-list table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.lib-list th { text-align: left; font-weight: 500; font-size: 11px; color: var(--trace-label-secondary); padding: 6px 8px; border-bottom: .5px solid var(--trace-separator); white-space: nowrap; }
.lib-list td { padding: 0 8px; height: 44px; border-bottom: .5px solid var(--trace-separator); white-space: nowrap; font-variant-numeric: tabular-nums; color: var(--trace-label-secondary); }
.lib-list td.t { color: var(--trace-label); width: 44%; }
.lib-list td.t > div { display: flex; align-items: center; gap: 10px; }
.lib-list td.t .mini { width: 24px; height: 31px; border-radius: 2px; overflow: hidden; box-shadow: var(--trace-cover-shadow); flex: none; position: relative; }
.lib-list tr.sel td { background: var(--trace-accent); color: rgba(255,255,255,.85); }
.lib-list tr.sel td.t { color: #fff; }
.lib-list tr:nth-child(even) td { background: color-mix(in srgb, var(--trace-label) 2.2%, transparent); }
.lib-list tr.sel:nth-child(even) td { background: var(--trace-accent); }
.prog-bar { display: inline-block; width: 60px; height: 3px; border-radius: 2px; background: var(--trace-fill-pressed); vertical-align: middle; margin-right: 8px; overflow: hidden; }
.prog-bar i { display: block; height: 100%; background: var(--trace-graphite); }
.trace-count { display: inline-flex; align-items: center; gap: 4px; color: var(--trace-label-secondary); }
.trace-count svg { color: var(--trace-graphite); }
.drop-frame { position: absolute; inset: 10px; border-radius: 12px; border: 2px dashed var(--trace-accent); background: color-mix(in srgb, var(--trace-accent) 5%, transparent); z-index: 30; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; color: var(--trace-accent); font-size: 15px; font-weight: 600; }
.drop-frame .drop-card { display:flex; flex-direction:column; align-items:center; gap:8px; padding:20px 28px; border-radius:12px; background: var(--trace-window); box-shadow: var(--trace-overlay-shadow); }
.drop-frame small { font-size: 12px; font-weight: 400; color: var(--trace-label-secondary); }
.empty { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; text-align: center; }
.empty p { margin: 0; font-size: 13px; color: var(--trace-label-secondary); }
.search-field { display: inline-flex; align-items: center; gap: 6px; height: 28px; padding: 0 8px; border-radius: 7px; background: var(--trace-fill); color: var(--trace-label-tertiary); font-size: 13px; width: 220px; }
.search-field.focus { box-shadow: 0 0 0 3px var(--trace-focus-ring); background: var(--trace-content); color: var(--trace-label); }
.search-field .ph { color: var(--trace-label-tertiary); }

/* ============================ Settings ============================ */
.set-side { width: 190px; flex: none; background: var(--trace-sidebar); border-right: .5px solid var(--trace-separator); padding-top: 8px; }
.set-side .sb-row { margin: 0 8px; }
.set-main { flex: 1; min-width: 0; overflow: hidden; background: var(--trace-window); position: relative; }
.set-inner { padding: 18px 24px 24px; }
.set-inner h2 { font: 600 17px/1.2 var(--trace-font-ui); margin: 0 0 14px; }
.set-group { background: var(--trace-content); border-radius: 8px; box-shadow: 0 0 0 .5px var(--trace-separator); margin-bottom: 14px; }
.set-group-title { font-size: 11px; font-weight: 600; color: var(--trace-label-secondary); margin: 0 0 6px 2px; }
.set-row { display: flex; align-items: center; min-height: 36px; padding: 6px 12px; gap: 12px; border-top: .5px solid var(--trace-separator); font-size: 13px; }
.set-row:first-child { border-top: 0; }
.set-row .lbl { flex: 1; min-width: 0; }
.set-row .lbl small { display: block; font-size: 11px; color: var(--trace-label-secondary); margin-top: 1px; }
.popup { display: inline-flex; align-items: center; gap: 6px; height: 22px; padding: 0 4px 0 8px; border-radius: 5px; font-size: 12.5px; background: var(--trace-content); box-shadow: 0 0 0 .5px var(--trace-separator-strong), 0 .5px 1.5px rgba(0,0,0,.08); white-space: nowrap; }
[data-theme="dark"] .popup { background: rgba(255,255,255,.12); box-shadow: none; }
.popup .ic { color: var(--trace-label-secondary); }
.switch { width: 30px; height: 18px; border-radius: 9px; background: var(--trace-fill-pressed); position: relative; flex: none; }
.switch::after { content: ""; position: absolute; left: 1.5px; top: 1.5px; width: 15px; height: 15px; border-radius: 50%; background: #fff; box-shadow: 0 1px 2px rgba(0,0,0,.25); }
.switch.on { background: var(--trace-accent); }
.switch.on::after { left: 13.5px; }
.tf { height: 22px; border-radius: 5px; padding: 0 7px; display: inline-flex; align-items: center; background: var(--trace-content); box-shadow: inset 0 0 0 .5px var(--trace-separator-strong); font-size: 12.5px; color: var(--trace-label); min-width: 0; white-space: nowrap; overflow: hidden; }
[data-theme="dark"] .tf { background: rgba(0,0,0,.2); }
.tf.ro { color: var(--trace-label-secondary); background: var(--trace-fill); box-shadow: none; }
.tf.focus { box-shadow: 0 0 0 3px var(--trace-focus-ring), inset 0 0 0 .5px var(--trace-accent); }
.matrix { border-collapse: separate; border-spacing: 0; width: 100%; font-size: 12.5px; }
.matrix th { font-weight: 500; font-size: 11px; color: var(--trace-label-secondary); padding: 8px 6px; text-align: center; border-bottom: .5px solid var(--trace-separator); }
.matrix th:first-child { text-align: left; padding-left: 12px; }
.matrix td { text-align: center; height: 40px; border-bottom: .5px solid var(--trace-separator); padding: 0 4px; }
.matrix tr:last-child td { border-bottom: 0; }
.matrix td:first-child { text-align: left; padding-left: 12px; font-size: 13px; }
.radio { display: inline-block; width: 15px; height: 15px; border-radius: 50%; box-shadow: inset 0 0 0 .5px var(--trace-separator-strong), 0 .5px 1px rgba(0,0,0,.08); background: var(--trace-content); vertical-align: middle; position: relative; }
.radio.on { background: var(--trace-accent); box-shadow: none; }
.radio.on::after { content: ""; position: absolute; inset: 5px; border-radius: 50%; background: #fff; }
.taken { display: block; font-size: 10px; color: var(--trace-label-tertiary); margin-top: 2px; white-space: nowrap; }
.radio.dis { background: var(--trace-fill); box-shadow: none; opacity: .6; }
.svc-card { border-radius: 8px; box-shadow: 0 0 0 .5px var(--trace-separator); background: var(--trace-content); padding: 10px 12px; display: flex; flex-direction: column; gap: 6px; }
.svc-card.sel { box-shadow: 0 0 0 1.5px var(--trace-accent); }
.status-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--trace-label-tertiary); }
.status-dot.ok { background: var(--trace-positive); }
.status-dot.err { background: var(--trace-negative); }
.status-dot.idle { background: transparent; box-shadow: inset 0 0 0 1.2px var(--trace-label-tertiary); }
.test-out { font: 12.5px/19px var(--trace-font-zh); background: var(--trace-surface-sunken); border-radius: 6px; padding: 8px 10px; box-shadow: inset 0 0 0 .5px var(--trace-separator); min-height: 56px; }
.swatch { width: 20px; height: 20px; border-radius: 50%; display: inline-block; position: relative; box-shadow: inset 0 0 0 .5px rgba(0,0,0,.15); }
.swatch.on::after { content: ""; position: absolute; inset: -3px; border-radius: 50%; box-shadow: 0 0 0 1.5px var(--trace-accent); }
.slider { position: relative; width: 120px; height: 18px; display: inline-block; }
.slider::before { content: ""; position: absolute; left: 0; right: 0; top: 8px; height: 3px; border-radius: 2px; background: var(--trace-fill-pressed); }
.slider i { position: absolute; top: 8px; left: 0; height: 3px; border-radius: 2px; background: var(--trace-accent); }
.slider b { position: absolute; top: 1px; width: 16px; height: 16px; border-radius: 50%; background: #fff; box-shadow: 0 0 0 .5px rgba(0,0,0,.2), 0 1px 3px rgba(0,0,0,.2); }

/* ============================ Footprints ============================ */
.fp-side { width: 212px; flex: none; background: var(--trace-sidebar); border-right: .5px solid var(--trace-separator); overflow: hidden; }
.fp-center { flex: 1; min-width: 0; display: flex; flex-direction: column; background: var(--trace-content); border-right: .5px solid var(--trace-separator); }
.fp-detail { width: 360px; flex: none; background: var(--trace-window); overflow: hidden; display: flex; flex-direction: column; }
.fp-check { display: flex; align-items: center; gap: 8px; height: 26px; margin: 0 10px; padding: 0 8px; border-radius: 6px; font-size: 12.5px; }
.fp-check .box { width: 14px; height: 14px; border-radius: 4px; box-shadow: inset 0 0 0 .5px var(--trace-separator-strong); background: var(--trace-content); flex: none; display: flex; align-items: center; justify-content: center; color: #fff; }
.fp-check .box.on { background: var(--trace-accent); box-shadow: none; }
.fp-check .ic.t { color: var(--trace-graphite); }
.fp-check .cnt { margin-left: auto; color: var(--trace-label-tertiary); font-size: 11px; }
.revisit { margin: 14px 20px 6px; padding: 14px 16px 14px; border-radius: 10px; background: var(--trace-window); box-shadow: inset 0 0 0 .5px var(--trace-separator); display: grid; grid-template-columns: 1fr auto; gap: 6px 16px; }
.revisit .k { font-size: 11px; color: var(--trace-label-tertiary); display: flex; gap: 6px; align-items: center; }
.revisit .q { grid-column: 1; font: 15px/1.5 var(--trace-font-headword); color: var(--trace-label); }
.revisit .q u { text-decoration: none; background-image: radial-gradient(circle, var(--trace-graphite) .7px, transparent .9px); background-size: 3px 3px; background-repeat: repeat-x; background-position: 0 100%; padding-bottom: 3px; }
.revisit .g { grid-column: 1; font: 12.5px/1.5 var(--trace-font-zh); color: var(--trace-label-secondary); }
.revisit .acts { grid-column: 2; grid-row: 1 / span 3; display: flex; flex-direction: column; gap: 6px; align-items: flex-end; justify-content: flex-start; }
.fp-group { font-size: 11px; font-weight: 600; color: var(--trace-label-tertiary); padding: 14px 20px 4px; display: flex; gap: 8px; align-items: baseline; }
.fp-group .doc { font-weight: 400; color: var(--trace-label-secondary); font-style: italic; font-family: var(--trace-font-headword); font-size: 12px; }
.fp-item { display: grid; grid-template-columns: 16px 1fr auto; gap: 3px 10px; padding: 8px 12px 9px; margin: 0 8px; border-radius: 7px; }
.fp-item .ic { color: var(--trace-graphite); margin-top: 2px; }
.fp-item .src { font: 13.5px/1.45 var(--trace-font-headword); color: var(--trace-label-secondary); }
.fp-item .src u { text-decoration: none; color: var(--trace-label); background-image: radial-gradient(circle, var(--trace-graphite) .7px, transparent .9px); background-size: 3px 3px; background-repeat: repeat-x; background-position: 0 100%; padding-bottom: 2px; }
.fp-item .src mark { background: var(--trace-hl-citron); color: var(--trace-label); mix-blend-mode: normal; }
.fp-item .gl { grid-column: 2; font: 12px/1.45 var(--trace-font-zh); color: var(--trace-label-secondary); }
.fp-item .where { grid-column: 3; grid-row: 1; font-size: 11px; color: var(--trace-label-tertiary); white-space: nowrap; font-variant-numeric: tabular-nums; padding-top: 2px; }
.fp-item.sel { background: var(--trace-fill-selected); }
.crop { margin: 0 20px; border-radius: 6px; overflow: hidden; position: relative; box-shadow: 0 0 0 .5px var(--trace-separator-strong); background: #fff; }

/* ============================ Command palette ============================ */
.cmdk-scrim { position: absolute; inset: 0; background: var(--trace-scrim); z-index: 40; }
.cmdk { position: absolute; left: 50%; top: 118px; width: 600px; transform: translateX(-50%); background: var(--trace-overlay-bg); border-radius: 12px; box-shadow: var(--trace-overlay-shadow-drag); outline: .5px solid var(--trace-overlay-border); z-index: 41; overflow: hidden; }
.cmdk-input { display: flex; align-items: center; gap: 10px; height: 48px; padding: 0 16px; border-bottom: .5px solid var(--trace-separator); font-size: 16px; }
.cmdk-input .ic { color: var(--trace-label-tertiary); }
.cmdk-input .caret { display: inline-block; width: 1.5px; height: 19px; background: var(--trace-accent); vertical-align: -3px; }
.cmdk-group { font-size: 11px; font-weight: 600; color: var(--trace-label-tertiary); padding: 10px 16px 4px; }
.cmdk-item { display: flex; align-items: center; gap: 10px; height: 34px; margin: 0 6px; padding: 0 10px; border-radius: 7px; font-size: 13px; }
.cmdk-item .ic { color: var(--trace-label-secondary); }
.cmdk-item .ic.t { color: var(--trace-graphite); }
.cmdk-item .d { color: var(--trace-label-tertiary); font-size: 12px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.cmdk-item .en { font-family: var(--trace-font-headword); font-size: 14px; }
.cmdk-item .en em { font-style: normal; background: var(--trace-fill-pressed); border-radius: 2px; }
.cmdk-item .sc { margin-left: auto; display: flex; gap: 3px; flex: none; }
.cmdk-item.hl { background: var(--trace-fill-selected); }
.cmdk-foot { display: flex; gap: 14px; align-items: center; height: 32px; padding: 0 16px; font-size: 11px; color: var(--trace-label-tertiary); border-top: .5px solid var(--trace-separator); }

/* ============================ Sidecar / player / focus / OCR ============================ */
.sidecar { width: 280px; flex: none; background: var(--trace-window); border-left: .5px solid var(--trace-separator); position: relative; overflow: hidden; }
.sidecar-head { height: 38px; display: flex; align-items: center; gap: 8px; padding: 0 12px 0 16px; border-bottom: .5px solid var(--trace-separator); font-size: 12px; font-weight: 600; background: var(--trace-window); position: relative; z-index: 2; }
.sidecar-head span { font-weight: 400; color: var(--trace-label-tertiary); font-size: 11px; }
.sc-block { position: absolute; left: 12px; right: 12px; padding: 8px 10px 10px 12px; border-radius: 8px; font: 13px/20px var(--trace-font-zh); color: var(--trace-label); }
.sc-block .n { font-size: 10.5px; color: var(--trace-label-tertiary); display: flex; justify-content: space-between; align-items: center; margin-bottom: 2px; font-family: var(--trace-font-ui); }
.sc-block.hover { background: var(--trace-content); box-shadow: 0 0 0 .5px var(--trace-separator-strong); }
.sc-block.loading .sk { margin: 7px 0; }
.player { position: absolute; left: 50%; bottom: 20px; transform: translateX(-50%); height: 40px; padding: 0 6px 0 6px; display: flex; align-items: center; gap: 4px; background: var(--trace-overlay-bg); border-radius: 10px; box-shadow: var(--trace-overlay-shadow); outline: .5px solid var(--trace-overlay-border); z-index: 28; font-size: 12px; }
.player .pbtn { width: 30px; height: 30px; border-radius: 7px; display: flex; align-items: center; justify-content: center; color: var(--trace-label); }
.player .pbtn:hover { background: var(--trace-fill); }
.player .rate { height: 24px; padding: 0 8px; border-radius: 6px; background: var(--trace-fill); font-variant-numeric: tabular-nums; display: flex; align-items: center; }
.player .prog { width: 180px; height: 3px; border-radius: 2px; background: var(--trace-fill-pressed); margin: 0 8px; overflow: hidden; }
.player .prog i { display: block; height: 100%; background: var(--trace-graphite); }
.player .lbl { color: var(--trace-label-secondary); font-size: 11px; max-width: 170px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.speech-word { position: absolute; background: var(--trace-speech-word); border-radius: 2px; z-index: 2; mix-blend-mode: multiply; }
[data-paper="dark"] .speech-word { mix-blend-mode: screen; }
.focus-shade { position: absolute; left: 0; right: 0; background: var(--trace-focus-dim); z-index: 6; pointer-events: none; }
.focus-band { position: absolute; left: 0; right: 0; background: var(--trace-focus-band); mix-blend-mode: multiply; z-index: 6; pointer-events: none; }
.ocr-sweep { position: absolute; left: 0; right: 0; height: 90px; background: linear-gradient(to bottom, transparent, var(--trace-ocr-sweep) 70%, color-mix(in srgb, var(--trace-accent) 18%, transparent) 99%, transparent); z-index: 5; pointer-events: none; }
.ocr-box { position: absolute; border: .75px solid color-mix(in srgb, var(--trace-accent) 70%, transparent); background: color-mix(in srgb, var(--trace-accent) 5%, transparent); border-radius: 1px; z-index: 5; }
.ocr-box.low { border-color: var(--trace-caution); border-style: dashed; }
.ocr-legend { position: absolute; right: 16px; top: 12px; z-index: 29; padding: 6px 10px; border-radius: 8px; background: var(--trace-overlay-bg); box-shadow: var(--trace-overlay-shadow); font-size: 11px; color: var(--trace-label-secondary); display: flex; gap: 12px; align-items: center; }
.ring { display: block; }

/* 引导 */
.onb { position: absolute; inset: 0; background: var(--trace-scrim); z-index: 50; display: flex; align-items: center; justify-content: center; }
.onb-card { width: 640px; background: var(--trace-window); border-radius: 12px; box-shadow: var(--trace-overlay-shadow-drag); outline: .5px solid var(--trace-overlay-border); overflow: hidden; }
.onb-steps { display: flex; gap: 6px; justify-content: center; padding: 18px 0 0; }
.onb-steps i { width: 6px; height: 6px; border-radius: 50%; background: var(--trace-label-quaternary); }
.onb-steps i.on { background: var(--trace-label); width: 18px; border-radius: 3px; }
.onb-body { padding: 18px 40px 8px; text-align: center; }
.onb-body h2 { font: 600 20px/1.3 var(--trace-font-ui); margin: 10px 0 6px; }
.onb-body p { margin: 0 auto; max-width: 440px; font-size: 13px; line-height: 1.6; color: var(--trace-label-secondary); }
.onb-foot { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-top: .5px solid var(--trace-separator); margin-top: 24px; }
.breathe { position: absolute; border-radius: 3px; pointer-events: none; z-index: 5; box-shadow: 0 0 0 1.5px color-mix(in srgb, var(--trace-graphite) 70%, transparent); animation: breathe 2400ms ease-in-out infinite; }
.breathe.static { animation: none; opacity: .75; }
@keyframes breathe { 0%,100% { opacity: .25; } 50% { opacity: .85; } }
.coach { position: absolute; z-index: 26; font-size: 12px; padding: 6px 10px; border-radius: 7px; background: var(--trace-label); color: var(--trace-window); white-space: nowrap; }
.coach::after { content: ""; position: absolute; left: 50%; bottom: -4px; width: 8px; height: 8px; margin-left: -4px; background: inherit; transform: rotate(45deg); border-radius: 1px; }

/* 标注（设计稿说明，不属于产品 UI） */
.anno-box { position: absolute; border: 1px dashed #d4562f; z-index: 80; pointer-events: none; }
.anno-lbl { position: absolute; font: 600 10px/1 var(--trace-font-ui); color: #fff; background: #d4562f; padding: 3px 5px; border-radius: 3px; white-space: nowrap; z-index: 81; pointer-events: none; }
body.solo .anno-box, body.solo .anno-lbl { display: none; }
body.hide-anno .anno-box, body.hide-anno .anno-lbl, body.hide-anno .pin-abs { display: none; }

@media (prefers-reduced-motion: reduce) {
  .sk.anim::after, .breathe, .ov-ipa .spin { animation: none; }
}

/* ============================ 语法可视化 ============================ */
.gv { color: var(--trace-label); }
.gv-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 2px; }
.gv-count { font-size: 11px; color: var(--trace-label-tertiary); }
.gv-sent { position: relative; font: 15px/52px var(--trace-font-headword); color: var(--trace-label); word-spacing: 1px; }
.gv-svg { position: absolute; left: 0; top: 0; pointer-events: none; overflow: visible; color: var(--trace-label); }
.gv-lbl { font: 10px var(--trace-font-zh); fill: var(--trace-label-secondary); }
.gv-fold { display: inline-flex; align-items: center; height: 20px; padding: 0 7px; border-radius: 5px; font: 11px var(--trace-font-zh); color: var(--trace-label-secondary); background: var(--trace-fill); box-shadow: inset 0 0 0 .5px var(--trace-separator-strong); vertical-align: 2px; }
.gv-legend { display: flex; flex-wrap: wrap; gap: 4px 12px; font-size: 10.5px; color: var(--trace-label-tertiary); margin-top: 4px; padding-bottom: 8px; border-bottom: .5px solid var(--trace-separator); }
.gv-legend span { display: inline-flex; align-items: center; gap: 4px; }
.gv-legend svg { color: var(--trace-label-secondary); overflow: visible; }
.gv-skel { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 8px; padding-top: 8px; }
.gv-skel .lbl { font-size: 11px; color: var(--trace-label-secondary); }
.gv-skel .en { font: 14px/22px var(--trace-font-headword); }
.gv-skel .note { flex-basis: 100%; font: italic 12px/18px var(--trace-font-headword); color: var(--trace-label-tertiary); }
.gs { padding-bottom: 2px; }
.gs-subject { border-bottom: 1.25px solid currentColor; }
.gs-predicate { border-bottom: 3.5px double currentColor; }
.gs-object { text-decoration: underline wavy; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.coach.below::after { bottom: auto; top: -4px; }
.coach.left::after { left: -4px; top: 50%; bottom: auto; margin: -4px 0 0 0; }