:root {
  --bg: #f3f5f8;
  --panel: #ffffff;
  --panel-2: #f8fafc;
  --text: #17202a;
  --muted: #687386;
  --line: #dce2ea;
  --accent: #54277a;
  --accent-2: #7b42a6;
  --accent-soft: #f0e8f6;
  --danger: #b42318;
  --danger-soft: #fef3f2;
  --warning: #9a6700;
  --warning-soft: #fffaeb;
  --success: #067647;
  --success-soft: #ecfdf3;
  --shadow: 0 10px 32px rgba(25, 36, 50, 0.08);
  --radius: 18px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { min-height: 100%; color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}
button, input, textarea { font: inherit; }
button { cursor: pointer; }
a { color: var(--accent); }

.skip-link {
  position: fixed;
  left: 16px;
  top: -60px;
  z-index: 1000;
  padding: 10px 14px;
  background: var(--text);
  color: white;
  border-radius: 8px;
}
.skip-link:focus { top: 12px; }

.app-header {
  max-width: 1500px;
  margin: 0 auto;
  padding: 28px 28px 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  font-size: 28px;
  font-weight: 800;
}
.brand h1 { margin: 0; font-size: 1.35rem; letter-spacing: -0.02em; }
.brand p { margin: 4px 0 0; color: var(--muted); font-size: .9rem; }
.privacy-badge {
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  font-size: .82rem;
  white-space: nowrap;
}
.privacy-badge span { color: var(--success); }

.layout {
  width: min(1500px, calc(100% - 40px));
  margin: 20px auto 0;
  display: grid;
  grid-template-columns: minmax(340px, 440px) minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.input-card { padding: 22px; position: sticky; top: 18px; }
.viewer-card { min-height: 670px; padding: 22px; overflow: hidden; }
.card-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}
.card-heading h2 { margin: 1px 0 0; font-size: 1.1rem; }
.eyebrow {
  margin: 0 0 5px;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent);
  font-size: .7rem;
  font-weight: 800;
}
.file-stats { color: var(--muted); font-size: .82rem; text-align: right; }

.drop-zone {
  display: flex;
  min-height: 118px;
  padding: 18px;
  border: 1.5px dashed #b8c0cc;
  border-radius: 14px;
  background: var(--panel-2);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  color: var(--muted);
  text-align: center;
  transition: .16s ease;
  cursor: pointer;
}
.drop-zone:hover,
.drop-zone:focus,
.drop-zone.dragging {
  outline: none;
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--text);
}
.drop-zone input { display: none; }
.drop-icon { color: var(--accent); font-size: 1.65rem; line-height: 1; }
.drop-zone strong { color: var(--accent); }
.drop-zone small { font-size: .76rem; }
.source-info {
  margin-top: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-2);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2px 9px;
  align-items: baseline;
}
.source-info[hidden] { display: none; }
.source-info-label {
  grid-row: 1 / span 2;
  align-self: center;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.source-info strong {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text);
  font-size: .8rem;
}
.source-info-details { color: var(--muted); font-size: .72rem; }
.divider { display: flex; align-items: center; gap: 10px; margin: 16px 0; color: var(--muted); font-size: .78rem; }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.textarea-label { display: block; margin-bottom: 8px; font-size: .82rem; font-weight: 700; }
textarea {
  width: 100%;
  min-height: 280px;
  resize: vertical;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfcfe;
  color: #17202a;
  font-family: var(--mono);
  font-size: .78rem;
  line-height: 1.55;
  tab-size: 4;
}
textarea:focus, input:focus-visible { outline: 2px solid color-mix(in srgb, var(--accent) 30%, transparent); border-color: var(--accent); }
.input-actions { display: flex; gap: 10px; margin-top: 14px; }

.button, .icon-button {
  border: 1px solid transparent;
  border-radius: 10px;
  min-height: 40px;
  padding: 9px 13px;
  font-weight: 720;
  transition: transform .08s ease, background .15s ease, border-color .15s ease;
}
.button:active, .icon-button:active { transform: translateY(1px); }
.button:disabled, .icon-button:disabled { opacity: .45; cursor: not-allowed; }
.button.primary { flex: 1; background: var(--accent); color: white; }
.button.primary:hover { background: var(--accent-2); }
.button.secondary, .icon-button { background: var(--panel); color: var(--text); border-color: var(--line); }
.button.secondary:hover, .icon-button:hover { border-color: #aab4c1; background: var(--panel-2); }
.button.ghost { background: transparent; color: var(--accent); border-color: transparent; }
.button.ghost:hover { background: var(--accent-soft); }
.button.small { min-height: 34px; padding: 6px 10px; font-size: .78rem; }
.icon-button { width: 38px; padding: 0; font-size: 1.05rem; }

.validation-box {
  margin-top: 14px;
  padding: 12px 13px;
  border-radius: 10px;
  font-size: .8rem;
  line-height: 1.45;
}
.validation-box.error { color: var(--danger); background: var(--danger-soft); border: 1px solid #fecdca; }
.validation-box.warning { color: var(--warning); background: var(--warning-soft); border: 1px solid #fedf89; }
.validation-box.success { color: var(--success); background: var(--success-soft); border: 1px solid #abefc6; }
.validation-box ul { margin: 7px 0 0; padding-left: 18px; }

.empty-state {
  min-height: 520px;
  display: grid;
  place-items: center;
  align-content: center;
  text-align: center;
  color: var(--muted);
}
.empty-state h3 { color: var(--text); margin: 22px 0 5px; }
.empty-state p { max-width: 430px; margin: 0; }
.empty-tree { position: relative; width: 180px; height: 75px; color: var(--accent); }
.empty-tree span { position: absolute; left: 68px; top: 0; padding: 4px 10px; border-radius: 8px; background: var(--accent-soft); font-weight: 800; }
.empty-tree i { position: absolute; top: 42px; width: 50px; height: 28px; border-top: 2px solid #c8b2da; border-radius: 50% 50% 0 0; }
.empty-tree i:nth-of-type(1) { left: 12px; transform: rotate(-16deg); }
.empty-tree i:nth-of-type(2) { left: 65px; }
.empty-tree i:nth-of-type(3) { right: 12px; transform: rotate(16deg); }

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-2);
}
.nav-group, .toolbar-actions, .export-group { display: flex; align-items: center; gap: 8px; }
.sentence-jump { display: flex; align-items: center; gap: 7px; font-size: .82rem; color: var(--muted); }
.sentence-jump input {
  width: 66px;
  height: 36px;
  padding: 6px 7px;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: center;
  color: var(--text);
  background: var(--panel);
}

.sentence-meta { padding: 18px 4px 8px; }
.sentence-meta > div { display: flex; gap: 8px; align-items: baseline; color: var(--muted); font-size: .78rem; }
.meta-label { text-transform: uppercase; letter-spacing: .07em; font-weight: 800; }
.sentence-meta p { margin: 7px 0 0; font-size: 1rem; line-height: 1.5; }
.mono { font-family: var(--mono); }

.display-options {
  margin: 7px 0 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  color: var(--muted);
  font-size: .8rem;
}
.display-options summary { cursor: pointer; font-weight: 750; color: var(--text); }
.feature-grid { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 7px; }
.feature-grid label {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--text);
}
.dynamic-features { display: contents; }
.render-status { min-height: 22px; padding: 0 4px; color: var(--muted); font-size: .78rem; }

.svg-stage {
  position: relative;
  min-height: 390px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: white;
  overflow: auto;
}
.svg-stage.busy::after {
  content: "Renderizando…";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(255,255,255,.8);
  color: var(--muted);
  font-weight: 750;
  z-index: 3;
}

#svgwell .svgbox {
  overflow-x: auto;
  padding: 18px 8px 26px;
  border-bottom: 1px solid #eef1f5;
}
#svgwell .svgbox:last-child { border-bottom: 0; }
#svgwell svg { display: block; margin: 0 auto; max-width: none; }
.tree-caption {
  position: sticky;
  left: 0;
  display: flex;
  gap: 10px;
  align-items: baseline;
  margin: 0 4px 12px;
  color: #374151;
  font-size: .8rem;
}
.tree-caption-id {
  flex: 0 0 auto;
  padding: 3px 7px;
  border-radius: 6px;
  background: #f0e8f6;
  color: #54277a;
  font-family: var(--mono);
  font-weight: 700;
}
.tree-caption-text { min-width: 0; }
.render-error {
  min-height: 320px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 6px;
  color: #b42318;
  text-align: center;
}
.render-error span { max-width: 620px; color: #687386; font-size: .82rem; }

.raw-conllu {
  max-height: 320px;
  overflow: auto;
  margin: 12px 0 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #111827;
  color: #e5e7eb;
  white-space: pre;
  font-family: var(--mono);
  font-size: .76rem;
  line-height: 1.5;
}
.export-bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 12px; }

.app-footer {
  width: min(1500px, calc(100% - 40px));
  margin: 18px auto 40px;
  color: var(--muted);
  font-size: .78rem;
  text-align: right;
}

@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .input-card { position: static; }
  .viewer-card { min-height: 580px; }
}
@media (max-width: 620px) {
  .app-header { padding: 20px 16px 6px; align-items: flex-start; }
  .privacy-badge { display: none; }
  .layout { width: calc(100% - 20px); margin-top: 12px; gap: 12px; }
  .card { border-radius: 14px; }
  .input-card, .viewer-card { padding: 15px; }
  .toolbar, .export-bar { align-items: stretch; flex-direction: column; }
  .nav-group, .toolbar-actions, .export-group { justify-content: center; flex-wrap: wrap; }
  .toolbar-actions .button, .export-group .button { flex: 1; }
  .file-stats { display: none; }
  textarea { min-height: 220px; }
  .svg-stage { min-height: 310px; padding: 8px; }
  .app-footer { width: calc(100% - 24px); text-align: left; }
}

:root[data-theme="dark"] {
  --bg: #11151b;
  --panel: #171c24;
  --panel-2: #1c232d;
  --text: #edf1f7;
  --muted: #9ca8b7;
  --line: #303947;
  --accent: #c49ae3;
  --accent-2: #b67cdd;
  --accent-soft: #30223d;
  --shadow: 0 12px 32px rgba(0,0,0,.25);
}
:root[data-theme="dark"] textarea { background: #11161d; color: #e9eef5; }
:root[data-theme="dark"] .svg-stage { background: #ffffff; color: #17202a; }
:root[data-theme="dark"] .sentence-jump input { background: #11161d; color: #e9eef5; }

/* ===== v3: independent source memories, zoom, continuous mode and comparison ===== */
.compact-heading { margin-bottom: 12px; }

.source-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
  padding: 5px;
  margin-bottom: 14px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--panel-2);
}
.source-tab {
  min-width: 0;
  padding: 9px 10px;
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  text-align: left;
  transition: background .16s ease, border-color .16s ease, color .16s ease;
}
.source-tab span { display: block; font-size: .82rem; font-weight: 800; }
.source-tab small {
  display: block;
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: .68rem;
}
.source-tab.active {
  border-color: var(--line);
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 2px 8px rgba(25,36,50,.06);
}
.source-tab.active span { color: var(--accent); }

.source-panel { animation: panelIn .16s ease; }
@keyframes panelIn {
  from { opacity: .35; transform: translateY(3px); }
  to { opacity: 1; transform: translateY(0); }
}

.source-preview {
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-2);
  overflow: hidden;
}
.source-preview summary {
  padding: 9px 11px;
  cursor: pointer;
  color: var(--text);
  font-size: .76rem;
  font-weight: 750;
}
.input-preview {
  max-height: 235px;
  overflow: auto;
  margin: 0;
  padding: 12px;
  border-top: 1px solid var(--line);
  background: #111827;
  color: #e5e7eb;
  white-space: pre;
  font-family: var(--mono);
  font-size: .7rem;
  line-height: 1.45;
}
.text-source-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin: 2px 0 12px;
}
.text-source-heading strong { display: block; font-size: .88rem; }
.text-source-heading small { display: block; margin-top: 3px; color: var(--muted); font-size: .73rem; }
.memory-note {
  margin-top: 7px;
  color: var(--muted);
  font-size: .7rem;
  line-height: 1.4;
}

.viewer-source-summary {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 5px;
  min-width: 0;
}
.viewer-source-badge {
  display: inline-flex;
  padding: 3px 7px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: .63rem;
  font-weight: 850;
  letter-spacing: .08em;
}
.viewer-source-badge.text-source {
  background: #e7f4ff;
  color: #175cd3;
}

.main-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 9px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--panel-2);
}
.view-mode-group,
.orientation-group {
  display: inline-flex;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
}
.mode-button {
  min-height: 32px;
  padding: 6px 10px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  font-size: .75rem;
  font-weight: 750;
}
.mode-button:hover { color: var(--text); background: var(--panel-2); }
.mode-button.active { color: white; background: var(--accent); }

.zoom-group,
.viewer-action-group {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.zoom-value {
  min-width: 58px;
  height: 34px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  font-size: .74rem;
  font-weight: 800;
}
#rawBtn.active { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

.stale-notice {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 10px;
  padding: 9px 11px;
  border: 1px solid #fedf89;
  border-radius: 10px;
  background: var(--warning-soft);
  color: var(--warning);
  font-size: .75rem;
  line-height: 1.4;
}

.view-panel { margin-top: 10px; }
.view-panel.active-view { animation: viewIn .18s ease; }
@keyframes viewIn {
  from { opacity: .45; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}
.sentence-toolbar { margin-bottom: 0; }
.subtle-status { color: var(--muted); font-size: .73rem; }

/* Zoom works by changing the rendered SVG's CSS dimensions while retaining the
   original width/height attributes for clean SVG/PNG export. */
.svg-stage .dependency-tree-svg,
.continuous-well .dependency-tree-svg {
  max-width: none;
  transition: width .13s ease, height .13s ease;
  transform-origin: top left;
}

.continuous-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  padding: 8px 4px;
}
.continuous-header > div { display: flex; flex-direction: column; gap: 2px; }
.continuous-well {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.continuous-well.busy { opacity: .58; pointer-events: none; }
.continuous-well .svgbox.continuous-item {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  overflow-x: auto;
  box-shadow: 0 3px 12px rgba(25,36,50,.04);
}
.continuous-well .tree-caption {
  position: sticky;
  left: 0;
  z-index: 2;
  width: fit-content;
  max-width: calc(100vw - 90px);
  margin-bottom: 16px;
  padding-right: 8px;
  color: #374151;
}
.continuous-well .inline-raw {
  position: sticky;
  left: 0;
  width: min(100%, 1100px);
  margin: 16px 0 0;
}

.compare-controls {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-bottom: 8px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-2);
}
.compare-source-controls,
.compare-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 9px;
}
.compare-selector-block {
  flex: 1 1 0;
  min-width: 0;
  display: grid;
  grid-template-columns: auto minmax(120px, 1fr) auto 70px;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: .72rem;
}
.compare-selector-block > label:first-child {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 850;
}
.compare-selector-block select,
.compare-selector-block input {
  min-width: 0;
  height: 34px;
  padding: 5px 7px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  font-size: .74rem;
}
.compare-selector-block input { text-align: center; }
.compare-actions { justify-content: flex-end; }

.compare-grid {
  display: grid;
  gap: 12px;
  align-items: start;
}
.compare-grid.side-by-side { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.compare-grid.stacked { grid-template-columns: 1fr; }
.compare-pane {
  min-width: 0;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-2);
}
.compare-pane-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 7px;
}
.compare-pane-header > div { display: flex; align-items: center; gap: 7px; min-width: 0; }
.compare-pane-header strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: .78rem;
}
.compare-letter {
  display: grid;
  place-items: center;
  width: 25px;
  height: 25px;
  flex: 0 0 auto;
  border-radius: 7px;
  background: var(--accent);
  color: white;
  font-size: .72rem;
  font-weight: 850;
}
.compare-meta {
  min-height: 66px;
  padding: 6px 3px 10px;
}
.compare-meta > span { color: var(--accent); font-size: .7rem; font-weight: 750; }
.compare-meta p { margin: 5px 0 0; color: var(--text); font-size: .78rem; line-height: 1.4; }
.compare-stage {
  min-height: 300px;
  padding: 10px;
}
.compare-stage .svgbox { padding: 8px 4px 16px; }
.compare-pane .raw-conllu { max-height: 270px; }

@media (max-width: 1200px) {
  .main-toolbar { align-items: stretch; }
  .viewer-action-group { margin-left: auto; }
  .compare-selector-block { grid-template-columns: auto minmax(100px, 1fr) 64px; }
  .compare-selector-block label[for^="compareSentence"] { display: none; }
}

@media (max-width: 980px) {
  .input-card { position: static; }
  .compare-grid.side-by-side { grid-template-columns: 1fr; }
  .compare-source-controls { align-items: stretch; flex-direction: column; }
  #swapCompareBtn { align-self: center; transform: rotate(90deg); }
  .compare-selector-block { width: 100%; }
}

@media (max-width: 700px) {
  .main-toolbar { flex-direction: column; }
  .view-mode-group { width: 100%; }
  .view-mode-group .mode-button { flex: 1; }
  .zoom-group, .viewer-action-group { width: 100%; justify-content: center; flex-wrap: wrap; }
  .viewer-action-group .button { flex: 1; }
  .stale-notice { align-items: stretch; flex-direction: column; }
  .compare-actions { align-items: stretch; flex-direction: column; }
  .orientation-group { width: 100%; }
  .orientation-group .mode-button { flex: 1; }
  .compare-selector-block { grid-template-columns: auto minmax(0,1fr) 62px; }
  .continuous-well .svgbox.continuous-item { padding: 10px; }
}

:root[data-theme="dark"] .source-tab.active { box-shadow: none; }
:root[data-theme="dark"] .viewer-source-badge.text-source { background: #162b44; color: #84caff; }
:root[data-theme="dark"] .continuous-well .svgbox.continuous-item { background: #fff; }
:root[data-theme="dark"] .stale-notice { border-color: #6b4f12; }
:root[data-theme="dark"] .compare-stage { background: #fff; }

/* ===== v4: A/B workspaces, fixed baseline, independent snapshots and local zoom ===== */
.heading-help {
  margin: 6px 0 0;
  max-width: 360px;
  color: var(--muted);
  font-size: .74rem;
  line-height: 1.45;
}
.slot-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 14px;
}
.slot-tab {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-2);
  color: var(--muted);
  text-align: left;
}
.slot-tab.active {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  background: var(--accent-soft);
  color: var(--text);
}
.slot-tab .slot-letter,
.editing-slot-badge {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: .75rem;
  font-weight: 850;
}
.slot-tab > span:last-child { min-width: 0; }
.slot-tab strong { display: block; color: var(--text); font-size: .8rem; }
.slot-tab small {
  display: block;
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: .65rem;
}
.slot-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.slot-header-row > div { display: flex; align-items: center; gap: 8px; }
.slot-header-row strong { font-size: .84rem; }
.active-lock {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line)) !important;
  background: var(--accent-soft) !important;
  color: var(--accent) !important;
}
.memory-type-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 4px;
  margin-bottom: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-2);
}
.memory-type {
  min-height: 32px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  font-size: .74rem;
  font-weight: 800;
}
.memory-type.active { background: var(--panel); color: var(--accent); box-shadow: 0 1px 4px rgba(0,0,0,.06); }
.memory-type:disabled { opacity: .55; cursor: not-allowed; }
.memory-panel { animation: panelIn .14s ease; }
.drop-zone.locked { opacity: .58; cursor: not-allowed; pointer-events: none; }
.compact-actions { margin-top: 9px; }
.compact-actions .button { min-height: 34px; padding: 6px 10px; font-size: .75rem; }
.memory-state-note {
  min-height: 36px;
  margin-top: 12px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel-2);
  color: var(--muted);
  font-size: .72rem;
  line-height: 1.4;
}
.memory-state-note.pending { border-color: #fedf89; background: var(--warning-soft); color: var(--warning); }
.memory-state-note.synced { border-color: #abefc6; background: var(--success-soft); color: var(--success); }
.memory-state-note.fixed { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); background: var(--accent-soft); color: var(--accent); }
.update-slot-row { display: flex; margin-top: 10px; }
.update-slot-row .button { width: 100%; }

.single-source-bar,
.continuous-header,
.compare-master-toolbar,
.pane-controls-row,
.tree-local-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.single-source-bar,
.compare-master-toolbar {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-2);
}
.slot-choice {
  display: inline-flex;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel);
}
.slot-choice-btn {
  min-width: 36px;
  min-height: 30px;
  padding: 4px 9px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: .74rem;
  font-weight: 850;
}
.slot-choice-btn.active { background: var(--accent); color: #fff; }
.slot-choice-btn:disabled { opacity: .35; cursor: not-allowed; }
.pane-dirty-notice {
  margin: 8px 0;
  padding: 8px 10px;
  border: 1px solid #fedf89;
  border-radius: 9px;
  background: var(--warning-soft);
  color: var(--warning);
  font-size: .72rem;
  line-height: 1.4;
}
.pane-dirty-notice.fixed { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); background: var(--accent-soft); color: var(--accent); }

/* Zoom belongs to the tree it affects. */
.tree-local-toolbar {
  margin: 7px 0 8px;
  padding: 7px 8px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-2);
}
.tree-local-toolbar .zoom-group { display: inline-flex; align-items: center; gap: 5px; }
.tree-local-toolbar .zoom-value { height: 32px; min-width: 56px; }
.tree-local-toolbar .icon-button { width: 34px; min-height: 32px; height: 32px; }
.pane-tree-toolbar { position: sticky; top: 0; z-index: 4; background: color-mix(in srgb, var(--panel-2) 94%, transparent); backdrop-filter: blur(4px); }

.continuous-header {
  margin: 0 0 6px;
  padding: 8px 0;
}
.continuous-summary { margin-bottom: 5px; }

.compare-master-toolbar { margin-bottom: 8px; }
.compare-layout-group,
.compare-master-actions { display: inline-flex; align-items: center; gap: 5px; }
.compare-layout-group {
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel);
}
.compare-pane-header > div > div { min-width: 0; }
.compare-pane-header small {
  display: block;
  margin-top: 2px;
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--muted);
  font-size: .66rem;
}
.pane-controls-row {
  padding: 6px 2px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.pane-controls-row label { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: .7rem; }
.pane-controls-row input {
  width: 70px;
  height: 32px;
  padding: 4px 7px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel);
  color: var(--text);
  text-align: center;
}
.pane-empty {
  min-height: 260px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 6px;
  padding: 24px;
  color: #687386;
  text-align: center;
}
.pane-empty strong { color: #374151; }
.pane-empty span { max-width: 360px; font-size: .78rem; line-height: 1.45; }
.compare-stage { min-height: 330px; }
.compare-grid.stacked .compare-stage { min-height: 380px; }
.compare-grid.stacked .compare-pane-header small { max-width: 600px; }

/* SVG zoom remains CSS-only so downloads keep original geometry. */
.svg-stage .dependency-tree-svg,
.continuous-well .dependency-tree-svg,
.compare-stage .dependency-tree-svg {
  max-width: none;
  transition: width .12s ease, height .12s ease;
  transform-origin: top left;
}

@media (max-width: 900px) {
  .single-source-bar,
  .compare-master-toolbar,
  .tree-local-toolbar { align-items: stretch; flex-direction: column; }
  .nav-group, .slot-choice, .zoom-group, .export-group { justify-content: center; }
  .compare-master-actions { width: 100%; }
  .compare-master-actions .button { flex: 1; }
}

:root[data-theme="dark"] .memory-type.active { box-shadow: none; }
:root[data-theme="dark"] .pane-empty strong { color: #d8dee8; }
:root[data-theme="dark"] .pane-tree-toolbar { background: rgba(28,35,45,.94); }

/* A ação principal de entrada permanece junto do conteúdo que controla. */
.compact-actions #updateSlotBtn {
  flex: 1 1 auto;
}

.compact-actions #clearTextMemoryBtn,
.compact-actions #clearFileMemoryBtn {
  flex: 0 0 auto;
}

/* ===== Test pack v2: hierarchy, A/B identity, attributes, highlights, About ===== */
:root {
  --slot-a: #6f3799;
  --slot-a-soft: #efe5f7;
  --slot-b: #0a4d5e;
  --slot-b-soft: #e2edf1;
  --mode-active: #6a3294;
}
.header-actions { display:flex; align-items:center; gap:9px; }
.header-link { min-height:36px; padding:7px 12px; border:1px solid var(--line); border-radius:999px; background:var(--panel); color:var(--text); font-weight:800; }
.header-link:hover { border-color:var(--accent); color:var(--accent); }

#slotTabA .slot-letter,.editing-slot-badge.slot-a,.inline-slot-badge.slot-a,.compare-pane[data-pane="A"] .compare-letter { background:var(--slot-a); }
#slotTabB .slot-letter,.editing-slot-badge.slot-b,.inline-slot-badge.slot-b,.compare-pane[data-pane="B"] .compare-letter { background:var(--slot-b); }
#slotTabA.active { border-color:color-mix(in srgb,var(--slot-a) 55%,var(--line)); background:var(--slot-a-soft); }
#slotTabB.active { border-color:color-mix(in srgb,var(--slot-b) 55%,var(--line)); background:var(--slot-b-soft); }
#slotTabA.active strong,#slotTabA.active small,#slotTabB.active strong,#slotTabB.active small { color: var(--text); }
#singleSlotA.active,#continuousSlotA.active { background:var(--slot-a); color:#fff; }
#singleSlotB.active,#continuousSlotB.active { background:var(--slot-b); color:#fff; }
.compare-pane[data-pane="A"] { border-top:3px solid var(--slot-a); }
.compare-pane[data-pane="B"] { border-top:3px solid var(--slot-b); }
.mode-button.active { color:#fff; background:var(--mode-active); }

.inline-slot-badge { display:inline-grid; place-items:center; min-width:23px; height:23px; padding:0 7px; margin:0 2px; border-radius:7px; color:#fff; font-size:.72rem; line-height:1; font-weight:900; vertical-align:-2px; }
.main-toolbar { border-color:color-mix(in srgb,var(--line) 70%,var(--text)); box-shadow:0 3px 14px rgba(20,30,45,.05); }

.attribute-panel {
  margin:10px 0 12px;
  padding:11px 12px;
  border:1px solid #c9d6e6;
  border-radius:11px;
  background:color-mix(in srgb,#efe6f7 68%,var(--panel));
}
.attribute-panel.compact { padding: 0; overflow: visible; }
.attribute-bar {
  display:flex; align-items:center; justify-content:space-between; gap:14px;
  padding:11px 12px;
}
.attribute-bar > div:first-child { display:flex; flex-direction:column; gap:2px; }
.attribute-bar-actions { display:flex; align-items:center; gap:10px; position: relative; }
.attribute-panel-heading { display:flex; justify-content:space-between; align-items:flex-start; gap:16px; }
.attribute-panel-heading h3, .attribute-bar h3 { margin:1px 0 3px; font-size:.92rem; }
.attribute-panel-heading p:not(.eyebrow), .attribute-bar p:not(.eyebrow) { margin:0; color:var(--muted); font-size:.72rem; }
.feature-summary { max-width:420px; padding:5px 8px; border-radius:999px; background:var(--panel); border:1px solid var(--line); color:var(--muted); font-size:.68rem; line-height:1.35; text-align:right; }
.attribute-panel .feature-grid { margin-top:11px; }
.attribute-panel .feature-grid label { background:var(--panel); border-color:color-mix(in srgb,var(--line) 75%,var(--text)); }
.attribute-panel .feature-grid label:has(input:checked) { border-color:color-mix(in srgb,var(--accent) 50%,var(--line)); background:color-mix(in srgb,var(--accent-soft) 72%,var(--panel)); }

.advanced-attributes { margin-top:9px; border-top:1px solid color-mix(in srgb,var(--line) 80%,var(--accent)); padding-top:8px; }
.advanced-attributes summary { cursor:pointer; width:fit-content; color:var(--accent); font-size:.74rem; font-weight:850; }
.compact-dropdown { margin:0; padding:0; border:0; }
.compact-dropdown summary {
  list-style:none;
  min-height:34px;
  display:inline-flex; align-items:center; justify-content:center;
  padding:7px 12px;
  border:1px solid var(--line);
  border-radius:999px;
  background: var(--panel);
  color: var(--text);
}
.compact-dropdown summary::-webkit-details-marker { display:none; }
.compact-dropdown[open] summary { border-color: color-mix(in srgb,var(--accent) 45%,var(--line)); color: var(--accent); background: var(--accent-soft); }
.compact-dropdown .feature-grid {
  position:absolute; right:0; top:calc(100% + 8px); z-index:20;
  min-width:min(520px, calc(100vw - 64px));
  padding:12px; border:1px solid var(--line); border-radius:12px;
  background:var(--panel); box-shadow:0 16px 36px rgba(0,0,0,.16);
}
.compact-dropdown .dynamic-features { margin-top:4px; }

.highlight-strip { display:flex; align-items:center; justify-content:space-between; gap:14px; margin:10px 0 12px; padding:11px 12px; border:1px solid #c9d6e6; border-radius:11px; background:color-mix(in srgb,#eaf2fb 62%,var(--panel)); }
.highlight-strip>div { display:flex; flex-direction:column; gap:2px; }
.highlight-strip strong { color:var(--text); font-size:.78rem; }
.highlight-strip span { color:var(--muted); font-size:.69rem; line-height:1.4; }

.about-dialog { width:min(680px,calc(100vw - 32px)); max-height:min(820px,calc(100vh - 40px)); padding:0; border:1px solid var(--line); border-radius:18px; background:var(--panel); color:var(--text); box-shadow:0 24px 80px rgba(0,0,0,.24); }
.about-dialog::backdrop { background:rgba(9,15,25,.60); backdrop-filter:blur(2px); }
.about-dialog-card { padding:22px; }
.about-dialog-header { display:flex; align-items:flex-start; justify-content:space-between; gap:14px; margin-bottom:14px; }
.about-dialog-header h2 { margin:2px 0 0; }
.about-section { margin-top:20px; padding-top:16px; border-top:1px solid var(--line); }
.about-section h3 { margin:0 0 8px; font-size:.92rem; }
.about-section p { margin:7px 0; color:var(--muted); line-height:1.55; }
.citation-text { padding:12px; border:1px solid var(--line); border-radius:10px; background:var(--panel-2); color:var(--text)!important; font-family:var(--mono); font-size:.78rem; }
.about-actions { display:flex; flex-wrap:wrap; gap:8px; margin-top:9px; }
.about-help { font-size:.74rem; }

:root[data-theme="dark"] {
  --slot-a:#a760dd;
  --slot-a-soft:#2a1838;
  --slot-b:#247585;
  --slot-b-soft:#142a33;
  --mode-active:#9d54d7;
}
:root[data-theme="dark"] .attribute-panel { background:#241b34; border-color:#5f4c80; }
:root[data-theme="dark"] .compact-dropdown .feature-grid { box-shadow:0 18px 44px rgba(0,0,0,.45); }
:root[data-theme="dark"] .highlight-strip { border-color:#39516c; background:#172636; }
@media (max-width:900px) {
  .attribute-bar { align-items:stretch; flex-direction:column; }
  .attribute-bar-actions { justify-content:space-between; }
  .feature-summary { max-width:none; text-align:left; }
}
@media (max-width:700px) {
  .attribute-panel-heading,.highlight-strip { align-items:stretch; flex-direction:column; }
  .feature-summary { max-width:none; text-align:left; }
  .highlight-strip .button { width:100%; }
  .compact-dropdown .feature-grid { left:0; right:auto; min-width:calc(100vw - 64px); }
}


/* v5: primary render action follows the active A/B identity */
#updateSlotBtn.slot-a { background:var(--slot-a); border-color:var(--slot-a); color:#fff; }
#updateSlotBtn.slot-b { background:var(--slot-b); border-color:var(--slot-b); color:#fff; }
#updateSlotBtn.slot-a:hover:not(:disabled),#updateSlotBtn.slot-b:hover:not(:disabled) { filter:brightness(.90); }
#updateSlotBtn.slot-a:active:not(:disabled),#updateSlotBtn.slot-b:active:not(:disabled) { filter:brightness(.78); transform:translateY(1px); }
#updateSlotBtn:disabled { filter:none; }
.header-link.danger-link { color:#b42318; border-color:color-mix(in srgb,#b42318 30%,var(--line)); }
.header-link.danger-link:hover { color:#8f1d14; border-color:#b42318; background:color-mix(in srgb,#b42318 8%,var(--panel)); }
.button.danger { background:#b42318; border-color:#b42318; color:#fff; }
.button.danger:hover { background:#8f1d14; border-color:#8f1d14; }
.clear-all-actions { display:flex; justify-content:flex-end; gap:9px; margin-top:20px; }
:root[data-theme="dark"] .header-link.danger-link { color:#ff9b8f; border-color:#7a3e39; }
:root[data-theme="dark"] .header-link.danger-link:hover { color:#ffc0b8; border-color:#b95b50; background:#2f1b1a; }
:root[data-theme="dark"] .button.danger { background:#9e3228; border-color:#9e3228; }
:root[data-theme="dark"] .button.danger:hover { background:#b63d31; border-color:#b63d31; }


/* ===== v6: file CTA and empty-state drop target ===== */
#updateFileSlotBtn.slot-a {
  background: var(--slot-a);
  border-color: var(--slot-a);
  color: #fff;
}
#updateFileSlotBtn.slot-b {
  background: var(--slot-b);
  border-color: var(--slot-b);
  color: #fff;
}
#updateFileSlotBtn.slot-a:hover:not(:disabled),
#updateFileSlotBtn.slot-b:hover:not(:disabled) {
  filter: brightness(.90);
}
#updateFileSlotBtn.slot-a:active:not(:disabled),
#updateFileSlotBtn.slot-b:active:not(:disabled) {
  filter: brightness(.78);
  transform: translateY(1px);
}
#updateFileSlotBtn:disabled { filter: none; }

.empty-drop-zone {
  border: 1.5px dashed color-mix(in srgb, var(--line) 72%, var(--text));
  transition: border-color .15s ease, background .15s ease, box-shadow .15s ease;
}
.empty-drop-zone.dragging {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent-soft) 70%, var(--panel));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 20%, transparent);
}
.empty-drop-zone #emptyChooseFileBtn { margin-top: 8px; }
.empty-drop-hint {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: .7rem;
}
.heading-help .inline-slot-badge { margin-inline: 3px; }


/* ===== v3: complete validation diagnostics ===== */
.validation-summary {
  margin: 7px 0 5px;
  font-weight: 650;
}

.validation-preview {
  margin-bottom: 0;
}

.validation-more-count {
  opacity: .8;
}

.validation-tools {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.validation-details {
  flex: 1 1 360px;
  min-width: 0;
}

.validation-details > summary {
  cursor: pointer;
  font-weight: 700;
  user-select: none;
}

.validation-all-list {
  max-height: 280px;
  overflow: auto;
  margin: 9px 0 0;
  padding: 9px 12px 9px 30px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: color-mix(in srgb, var(--panel) 86%, transparent);
}

.validation-all-list li + li {
  margin-top: 4px;
}

.validation-all-list li > span {
  display: none;
}

.validation-download {
  flex: 0 0 auto;
  white-space: nowrap;
}


/* ===== v6: curved / angled arc selector ===== */
.arc-style-control {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
}

.arc-style-label {
  padding: 0 5px 0 3px;
  color: var(--muted);
  font-size: .76rem;
  font-weight: 700;
}

.arc-style-button {
  appearance: none;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: .76rem;
  font-weight: 750;
  padding: 6px 8px;
}

.arc-style-button:hover {
  color: var(--text);
}

.arc-style-button.active {
  background: color-mix(in srgb, var(--panel) 65%, var(--text) 9%);
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--line);
}


/* ===== v7.1: curved label lanes + arc selector UX ===== */

.attribute-bar > div:first-child {
  min-width: 220px;
}

.attribute-bar h3 {
  margin: 0 0 4px;
}

.attribute-bar-actions {
  flex: 0 1 auto;
  flex-wrap: nowrap;
}

.feature-summary {
  max-width: none;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  white-space: nowrap;
  text-align: left;
  font-weight: 700;
}

.toolbar-arc-style {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0;
  border: 0;
  background: transparent;
}

.toolbar-arc-style .arc-style-label {
  padding: 0;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 800;
  white-space: nowrap;
}

.toolbar-arc-style .arc-style-segments {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
}

.toolbar-arc-style .arc-style-button {
  min-width: 78px;
  min-height: 32px;
  padding: 6px 11px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: .75rem;
  font-weight: 800;
  transition:
    background .14s ease,
    color .14s ease,
    box-shadow .14s ease;
}

.toolbar-arc-style .arc-style-button:hover:not(.active) {
  background: var(--panel-2);
  color: var(--text);
}

.toolbar-arc-style .arc-style-button.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,.15);
}

.toolbar-arc-style .arc-style-button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (max-width: 900px) {
  .attribute-bar-actions {
    flex-wrap: wrap;
  }

  .feature-summary {
    white-space: normal;
  }
}

@media (max-width: 760px) {
  .viewer-action-group {
    flex-wrap: wrap;
  }

  .toolbar-arc-style {
    flex: 1 1 auto;
  }

  .toolbar-arc-style .arc-style-segments {
    flex: 1 1 auto;
  }

  .toolbar-arc-style .arc-style-button {
    min-width: 0;
  }
}


/* ===== v9.1 FINAL UX: attributes card + arc segmented control ===== */

.attribute-bar {
  align-items: center;
}

.attribute-bar > div:first-child {
  min-width: 220px;
}

.attribute-bar h3 {
  margin: 0 0 4px;
}

.attribute-bar .eyebrow {
  display: none !important;
}

.attribute-bar-actions {
  flex: 0 1 auto;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.feature-summary {
  max-width: none;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  white-space: normal;
  text-align: left;
  line-height: 1.35;
  font-weight: 700;
}

.toolbar-arc-style {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 8px 0 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.toolbar-arc-style .arc-style-label {
  padding: 0;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .01em;
  white-space: nowrap;
}

.toolbar-arc-style .arc-style-segments {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.02);
}

.toolbar-arc-style .arc-style-button {
  min-width: 82px;
  min-height: 32px;
  padding: 6px 12px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  box-shadow: none;
  cursor: pointer;
  font: inherit;
  font-size: .75rem;
  font-weight: 800;
  line-height: 1;
  transition:
    background .14s ease,
    color .14s ease,
    box-shadow .14s ease,
    transform .14s ease;
}

.toolbar-arc-style .arc-style-button:hover:not(.active) {
  background: var(--panel-2);
  color: var(--text);
}

.toolbar-arc-style .arc-style-button.active {
  background: var(--accent);
  color: #fff;
  box-shadow:
    0 1px 2px rgba(0,0,0,.14),
    0 0 0 1px rgba(255,255,255,.05) inset;
}

.toolbar-arc-style .arc-style-button:active {
  transform: translateY(1px);
}

.toolbar-arc-style .arc-style-button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (max-width: 900px) {
  .attribute-bar {
    align-items: flex-start;
  }

  .attribute-bar-actions {
    width: 100%;
  }
}

@media (max-width: 760px) {
  .toolbar-arc-style {
    width: 100%;
    justify-content: space-between;
    margin-right: 0;
  }

  .toolbar-arc-style .arc-style-segments {
    flex: 1 1 auto;
    max-width: 240px;
  }

  .toolbar-arc-style .arc-style-button {
    min-width: 0;
  }
}

/* ===== v9.2 FINAL UX: centered arc-format label ===== */

/*
 * O nome da configuração fica acima e centralizado sobre as duas opções.
 *
 *        Formato dos arcos
 *        [ Curvos | Angulados ]
 */
.viewer-action-group {
  align-items: flex-end;
}

.toolbar-arc-style {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  margin: 0 8px 0 0;
}

.toolbar-arc-style .arc-style-label {
  display: block;
  width: 100%;
  padding: 0;
  color: var(--muted);
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .01em;
  line-height: 1.1;
  text-align: center;
  white-space: nowrap;
}

.toolbar-arc-style .arc-style-segments {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.02);
}

.toolbar-arc-style .arc-style-button {
  min-width: 72px;
  min-height: 28px;
  padding: 5px 9px;
  border-radius: 6px;
  font-size: .72rem;
  line-height: 1;
}

.toolbar-arc-style .arc-style-button.active {
  box-shadow:
    0 1px 2px rgba(0,0,0,.14),
    0 0 0 1px rgba(255,255,255,.05) inset;
}

.viewer-action-group > #rawBtn {
  align-self: flex-end;
}

@media (max-width: 760px) {
  .viewer-action-group {
    align-items: stretch;
  }

  .toolbar-arc-style {
    width: auto;
    align-self: flex-start;
    margin-right: 0;
  }

  .toolbar-arc-style .arc-style-segments {
    width: auto;
    max-width: none;
  }

  .toolbar-arc-style .arc-style-button {
    min-width: 72px;
  }

  .viewer-action-group > #rawBtn {
    align-self: flex-start;
  }
}

/* ===== v9.3 FINAL UX: darker arc-format selection ===== */

/*
 * O seletor de formato não reutiliza a cor semântica de B.
 * O estado ativo continua no mesmo eixo cromático da interface,
 * porém mais escuro e menos saturado que os botões primários.
 */
.toolbar-arc-style .arc-style-segments {
  border-color: color-mix(in srgb, var(--line) 78%, var(--text));
  background: color-mix(in srgb, var(--panel) 94%, var(--text) 6%);
}

.toolbar-arc-style .arc-style-button {
  color: color-mix(in srgb, var(--muted) 88%, var(--text));
}

.toolbar-arc-style .arc-style-button:hover:not(.active) {
  background: color-mix(in srgb, var(--panel-2) 86%, var(--text) 14%);
  color: var(--text);
}

.toolbar-arc-style .arc-style-button.active {
  background: color-mix(in srgb, var(--accent) 62%, var(--panel) 38%);
  color: #fff;
  box-shadow:
    0 1px 2px rgba(0,0,0,.24),
    0 0 0 1px color-mix(in srgb, var(--accent) 52%, var(--line)) inset;
}

.toolbar-arc-style .arc-style-button.active:hover {
  background: color-mix(in srgb, var(--accent) 68%, var(--panel) 32%);
}

/* ===== v9.4 FINAL UX: mode-matched arc selector + sentence arrows ===== */

/*
 * Curvos / Angulados usa EXATAMENTE a mesma cor semântica dos
 * mode-buttons ativos ("Uma por vez", "Contínuo", "Comparar").
 */
.toolbar-arc-style .arc-style-button.active,
.toolbar-arc-style .arc-style-button.active:hover {
  background: var(--mode-active);
  color: #fff;
  box-shadow: none;
}

/*
 * A navegação entre sentenças precisa ser encontrada rapidamente.
 * Mantemos o estado desabilitado inequívoco, mas o botão habilitado
 * ganha borda e ícone mais fortes sem competir com ações primárias.
 */
#prevBtn,
#nextBtn {
  width: 42px;
  min-height: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--mode-active) 58%, var(--line));
  background: color-mix(in srgb, var(--mode-active) 8%, var(--panel));
  color: var(--mode-active);
  font-size: 1.18rem;
  font-weight: 900;
  line-height: 1;
  box-shadow: 0 1px 2px rgba(0,0,0,.08);
}

#prevBtn:hover:not(:disabled),
#nextBtn:hover:not(:disabled) {
  border-color: var(--mode-active);
  background: var(--mode-active);
  color: #fff;
}

#prevBtn:focus-visible,
#nextBtn:focus-visible {
  outline: 2px solid var(--mode-active);
  outline-offset: 2px;
}

#prevBtn:disabled,
#nextBtn:disabled {
  opacity: .38;
  border-color: var(--line);
  background: var(--panel);
  color: var(--muted);
  box-shadow: none;
}


/* ===== v1.0.0 theme + language preferences ===== */
.preference-toggle,
.language-toggle {
  min-height: 36px;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-width: 64px;
  padding-inline: 10px;
}

.theme-icon {
  opacity: .38;
  transition: opacity .14s ease, transform .14s ease;
}

.theme-divider {
  color: var(--muted);
  opacity: .72;
}

:root[data-theme="light"] .theme-icon-sun,
:root[data-theme="dark"] .theme-icon-moon {
  opacity: 1;
  transform: scale(1.08);
}

.language-toggle {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
}

.language-choice {
  appearance: none;
  min-width: 36px;
  min-height: 28px;
  padding: 4px 8px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: .72rem;
  font-weight: 850;
  line-height: 1;
}

.language-choice:hover:not(.active) {
  background: var(--panel-2);
  color: var(--text);
}

.language-choice.active {
  background: var(--mode-active);
  color: #fff;
}

.language-choice:focus-visible,
.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Export/display stages intentionally remain white in both interface themes. */
.svg-stage,
.compare-stage,
.continuous-well .svgbox.continuous-item {
  background: #fff;
}

@media (max-width: 780px) {
  .app-header {
    align-items: flex-start;
  }
  .header-actions {
    justify-content: flex-end;
    flex-wrap: wrap;
  }
  .privacy-badge {
    flex-basis: 100%;
    width: max-content;
    margin-left: auto;
  }
}

@media (max-width: 560px) {
  .app-header {
    flex-direction: column;
  }
  .header-actions {
    width: 100%;
    justify-content: flex-start;
  }
  .privacy-badge {
    flex-basis: auto;
    margin-left: 0;
  }
}


/* ===== v1.0.0: collapsible desktop inputs panel ===== */
.viewer-card {
  position: relative;
}

.inputs-panel-toggle {
  position: absolute;
  top: 22px;
  left: 22px;
  z-index: 8;
  width: 38px;
  height: 38px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--line) 82%, var(--text));
  border-radius: 11px;
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 5px 16px rgba(0,0,0,.13);
  cursor: pointer;
  transition: background .16s ease, border-color .16s ease, box-shadow .16s ease, transform .16s ease;
}

.inputs-panel-toggle:hover {
  background: var(--panel-2);
  border-color: color-mix(in srgb, var(--accent) 52%, var(--line));
  box-shadow: 0 7px 20px rgba(0,0,0,.16);
}

.inputs-panel-toggle:active {
  transform: translateY(1px);
}

.inputs-panel-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (min-width: 981px) {
  .viewer-heading {
    padding-left: 54px;
  }
}

.inputs-panel-toggle-icon {
  width: 22px;
  height: 22px;
  overflow: visible;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.inputs-panel-divider {
  opacity: .65;
}

.inputs-panel-chevron {
  transform-box: fill-box;
  transform-origin: center;
  transition: transform .16s ease;
}

.layout.inputs-collapsed {
  grid-template-columns: minmax(0, 1fr);
}

.layout.inputs-collapsed .viewer-card {
  grid-column: 1 / -1;
}

.layout.inputs-collapsed .inputs-panel-chevron {
  transform: rotate(180deg);
}

@media (prefers-reduced-motion: reduce) {
  .inputs-panel-toggle,
  .inputs-panel-chevron {
    transition: none;
  }
}

@media (max-width: 980px) {
  .inputs-panel-toggle {
    display: none !important;
  }
}

/* ===== v1.0.0: citation formats and downloads ===== */
.citation-format-label {
  margin: 0 0 8px !important;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 700;
}

.citation-format-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.citation-format-button {
  appearance: none;
  min-height: 32px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
  font: inherit;
  font-size: .76rem;
  font-weight: 750;
  cursor: pointer;
}

.citation-format-button:hover {
  border-color: color-mix(in srgb, var(--mode-active) 55%, var(--line));
  color: var(--text);
}

.citation-format-button.active {
  border-color: var(--mode-active);
  background: var(--mode-active);
  color: #fff;
}

.citation-format-button:focus-visible,
.citation-download-menu summary:focus-visible,
.citation-download-options button:focus-visible,
.citation-download-options a:focus-visible {
  outline: 2px solid var(--mode-active);
  outline-offset: 2px;
}

.citation-text {
  margin: 10px 0 0;
  min-height: 72px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-family: var(--font);
  font-size: .82rem;
  line-height: 1.55;
}

.citation-text code {
  font: inherit;
  white-space: inherit;
}

.citation-text.is-code,
.citation-text.is-code code {
  font-family: var(--mono);
  font-size: .76rem;
}

.citation-actions {
  align-items: flex-start;
}

.citation-download-menu {
  position: relative;
}

.citation-download-menu > summary {
  list-style: none;
  user-select: none;
}

.citation-download-menu > summary::-webkit-details-marker {
  display: none;
}

.citation-download-menu[open] > summary {
  border-color: var(--mode-active);
  color: var(--mode-active);
}

.citation-download-options {
  position: absolute;
  left: 0;
  top: calc(100% + 6px);
  z-index: 40;
  min-width: 220px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  box-shadow: 0 14px 32px rgba(0,0,0,.16);
}

.citation-download-options button,
.citation-download-options a {
  display: block;
  width: 100%;
  padding: 8px 9px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: .76rem;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}

.citation-download-options button:hover,
.citation-download-options a:hover {
  background: var(--panel-2);
}

@media (max-width: 520px) {
  .citation-format-button {
    flex: 1 1 calc(33.333% - 6px);
  }
  .citation-download-options {
    left: auto;
    right: 0;
  }
}