:root {
  --border: #ccc;
  --border-dark: #999;
  --bg: #fff;
  --bg-muted: #fafafa;
  --bg-hover: #f5f5f5;
  --bg-active: #ebebeb;
  --bg-subtle: #d4d0c8;
  --text-muted: #666;
  --text-small: 0.85rem;
  --font-mono: "Courier New", monospace;
}

body {
  max-width: 1000px;
  margin: 2rem auto;
  padding: 0 1rem;
  font-family: "Times New Roman", serif;
  font-size: 16px;
  line-height: 1.3;
}

h1 {
  color: #000;
  background-color: var(--border);
}

/* -- Shared input/button base ------------------------------- */

textarea,
button {
  font: inherit;
}

.tokPanel {
  display: flex;
  gap: 1rem;
  align-items: stretch;
}

#tokTextBox,
#seqTextBox,
#nextTextBox,
#posTextBox {
  flex: 1;
  min-height: 2rem;
  resize: none;
  padding: 0.75rem;
  border: 1px solid var(--border);
}

#tokButton,
#seqButton,
#posButton,
#posCollectButton,
.nextButton,
.ctrlBtn {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-dark);
  background: var(--bg-hover);
  cursor: pointer;
}

#tokButton:hover,
#seqButton:hover,
.nextButton:hover,
#posCollectButton:hover,
#posButton:hover,
.ctrlBtn:hover {
  background: var(--bg-subtle);
}

.ctrlBtn {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-size: 14px;
  border-color: var(--border-light);
  background: transparent;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ctrlBtn:active {
  transform: scale(0.98);
}

.ctrlBtn i {
  font-size: 16px;
  color: #888;
}

.nextButton {
  width: 100%;
}

/* -- Status text -------------------------------------------- */

#tokStatusText,
#seqStatusText,
#nextStatusBar > span,
#posStatusText {
  color: var(--text-muted);
  margin: 0;
  font-size: var(--text-small);
}

/* -- Shared table rules ------------------------------------- */
#posTable,
#seqTable,
#probTable {
  border-collapse: collapse;
  width: 100%;
}

/* -- Token table -------------------------------------------- */

#tokTable {
  width: 100%;
  border-collapse: collapse;
}

#tokTable td {
  padding: 0.75rem;
  vertical-align: top;
  border-top: 1px solid var(--border-light);
}

.tokSpecCol {
  width: 20rem;
}

.tokBox,
.seqBox {
  display: inline-flex;
  flex-direction: column;
  margin: 0.15rem;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--border);
  background: var(--bg-muted);
}

.seqBox:hover {
  cursor: pointer;
}

.tokText {
  font-family: var(--font-mono);
  font-size: var(--text-small);
}

.tokID {
  font-size: var(--text-small);
  color: var(--text-muted);
}

.tokSpecText {
  font-family: var(--font-mono);
  font-size: var(--text-small);
  font-weight: bold;
}

/* -- Sequence row ------------------------------------------- */

#seqRow {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px;
  align-items: flex-start;
}

.seqActiveToken {
  background: var(--bg-subtle);
  font-style: bold;
}

#seqTableWrapper {
  display: none;
  margin: 12px 0;
}

#seqTableWrapper .nextTokenRow {
  cursor: default;
}

/* -- Next token --------------------------------------------- */

#nextTextBox {
  width: 100%;
  min-height: 100px;
  box-sizing: border-box;
}

#nextStatusBar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 8px 0;
  box-sizing: border-box;
}

.nextStatusSpan {
  padding: 0 8px;
}

/* -- Probability table -------------------------------------- */

.probTable {
  width: 100%;
  border-collapse: collapse;
}

.probTable thead th {
  font-size: 12px;
  font-weight: 500;
  color: #888;
  text-align: left;
  padding: 4px 10px 8px;
  border-bottom: 1px solid #eee;
}

.nextTokenRow {
  cursor: pointer;
}

.nextTokenRow:hover .probCell {
  background: var(--bg-hover);
}

.nextTokenRow:active {
  opacity: 0.7;
}

.probCell {
  padding: 5px 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.probTok {
  font-family: var(--font-mono);
  font-size: 14px;
  min-width: 80px;
  white-space: pre;
}

.probBar {
  flex: 1;
  height: 6px;
  background: #eee;
  overflow: hidden;
}

.probBarFill {
  height: 100%;
  background: #888;
}

.probPct {
  font-size: 13px;
  color: var(--text-muted);
  min-width: 44px;
  text-align: right;
}

/* -- Control panel ------------------------------------------ */

.tokSideBox {
  display: flex;
  flex-direction: column;
  min-width: 190px;
}

.controlPanel {
  border: 1px solid var(--border);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--bg);
}

.panelLabel {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.sliderRow {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sliderTrack {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sliderTrack input[type="range"] {
  flex: 1;
}

.sliderVal {
  font-size: 13px;
  font-weight: 500;
  min-width: 24px;
  text-align: right;
}

.sliderLabels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
}

.panelDivider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* -- Limit banner ------------------------------------------- */

#limitBanner {
  --accent: #92600a;
  --accent-border: #e6a817;
  background: #fef3cd;
  border: 1px solid var(--accent-border);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
  margin-top: 12px;
}

#limitBanner i {
  font-size: 28px;
  color: var(--accent);
}

#limitBanner p {
  margin: 0;
  color: var(--accent);
}

#limitBanner button {
  background: var(--bg);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  padding: 6px 20px;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* -- POS tagger --------------------------------------------- */

#posTable th,
#posTable td {
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

#posTable th {
  font-weight: 500;
  color: var(--text-muted);
}

#posTable tfoot td {
  border-bottom: none;
  padding-top: 10px;
}

#posExampleList {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

#posExampleList li {
  cursor: pointer;
  padding: 8px 12px;
  border: 1px solid var(--border);
  width: fit-content;
}

#posExampleList li:hover {
  background: var(--bg-hover);
  border-color: #aaa;
}

#posExampleList li:active {
  background: var(--bg-active);
}

.textBoxContainer {
  flex: 1;
  display: flex;
  flex-direction: column;
}

#posSentence {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 1rem;
}

.posToken {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 90px;
  padding: 10px;
  border: 1px solid var(--border);
  background: var(--bg-muted);
}

.posWord {
  font-weight: bold;
  margin-bottom: 8px;
}

.posToken select {
  width: 100%;
}

.posModelTag {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-muted);
  display: none;
}

.posModelTag.visible {
  display: block;
}

.posDifferent {
  border-color: #d97706;
  background: #fffbeb;
}

.posControls {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  gap: 12px;
}