:root {
  --bg: #1e1e2e;
  --panel: #2a2a3c;
  --text: #e0e0e0;
  --accent: #7aa2f7;
  --border: #3a3a4c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    system-ui,
    -apple-system,
    sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

header h1 {
  font-size: 1.25rem;
  margin: 0;
}

.status-bar {
  font-size: 0.85rem;
  color: #aaa;
}

.layout {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem;
  align-items: flex-start;
}

.col-left,
.col-right {
  flex: 1;
  min-width: 0;
  min-width: 320px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1rem;
}

.panel h2 {
  margin-top: 0;
  font-size: 1rem;
}

textarea,
input,
select,
button {
  font: inherit;
  color: inherit;
}

textarea {
  width: 100%;
  background: #1a1a28;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  padding: 0.5rem;
  resize: vertical;
}

button {
  background: var(--accent);
  color: #1a1a28;
  border: none;
  border-radius: 4px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-weight: 600;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.actions {
  margin-top: 0.5rem;
}

.config-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 0.75rem;
  align-items: center;
}

.config-grid label {
  font-size: 0.85rem;
}

.config-grid select,
.config-grid input {
  background: #1a1a28;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.25rem 0.4rem;
  width: 100%;
}

.corpus-stats {
  font-size: 0.8rem;
  color: #aaa;
  margin-top: 0.5rem;
}
.warn {
  color: #f7a072;
}
/* Stats / metric rows */
.stats-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  font-size: 0.85rem;
  padding: 2px 0;
  border-bottom: 1px dotted var(--border);
}
.stats-label {
  color: #aaa;
}
.stats-value {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}
.stats-empty {
  font-size: 0.85rem;
  color: #888;
  font-style: italic;
}

.analysis-view {
  line-height: 2;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, monospace;
  min-height: 3rem;
}

.tok {
  cursor: pointer;
  border-radius: 2px;
  padding: 0 1px;
}
.tok:hover {
  outline: 1px solid var(--accent);
}

.legend {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  margin-bottom: 0.5rem;
}
.legend-bar {
  height: 12px;
  width: 160px;
  border-radius: 3px;
}

.progress {
  font-size: 0.8rem;
  color: var(--accent);
}

/* Popup */
.popup {
  position: absolute;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem;
  min-width: 200px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  z-index: 100;
}
.popup h3 {
  margin: 0 0 0.4rem;
  font-size: 0.85rem;
}
.popup-head-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: #9aa;
  padding: 2px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2px;
}
.popup-col-tok {
  flex: 0 0 60px;
}
.popup-col-bar {
  flex: 1;
}
.popup-col-num {
  flex: 0 0 60px;
  text-align: right;
}
.popup-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  padding: 1px 0;
}
.popup-row.original {
  font-weight: 700;
  color: var(--accent);
}
.popup-row.clickable {
  cursor: pointer;
  border-radius: 3px;
}
.popup-row.clickable:hover,
.popup-row.clickable:focus {
  background: #1a1a28;
  outline: 1px solid var(--accent);
}
.popup-tok {
  flex: 0 0 60px;
  white-space: pre;
  overflow: hidden;
  text-overflow: ellipsis;
}
.popup-bar-wrap {
  flex: 1;
  background: #1a1a28;
  border-radius: 2px;
}
.popup-bar {
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
}
.popup-p {
  flex: 0 0 60px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.popup-close {
  position: absolute;
  top: 2px;
  right: 4px;
  background: none;
  color: var(--text);
  padding: 0;
  font-size: 1rem;
}

.no-support {
  padding: 1rem;
  background: #712;
  color: #fff;
  text-align: center;
}

@media (max-width: 800px) {
  .layout {
    flex-direction: column;
  }
}

/* --- Cellular Automaton --- */
#caPanel {
  flex: 1 1 100%;
  width: 100%;
}
#caPanel textarea {
  margin-bottom: 0.5rem;
}
#caPanel .config-grid {
  margin-bottom: 0.75rem;
}
#caPanel .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
#caPanel .actions button {
  margin: 0;
}
.ca-status {
  font-size: 0.85rem;
  color: var(--accent);
  margin: 0.4rem 0;
}
.ca-metrics {
  margin: 0.5rem 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.25rem 1rem;
}
.ca-view-controls {
  margin: 0.4rem 0;
}
.ca-view {
  margin-top: 0.75rem;
}
.ca-view-controls select {
  background: #1a1a28;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 4px;
  padding: 0.25rem 0.4rem;
}
.ca-view h2 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}
.ca-spacetime {
  max-height: 90vh;
  overflow: auto;
  border: 1px solid var(--border);
  background: #14141f;
  border-radius: 4px;
  padding: 2px;
  font-family: ui-monospace, monospace;
  line-height: 1;
  white-space: nowrap;
}
.ca-row {
  display: block;
  white-space: pre;
}
.ca-cell {
  display: inline-block;
  min-width: 0.7ch;
  text-align: center;
  cursor: pointer;
  padding: 0 1px;
  color: var(--text);
  white-space: pre;
}
.ca-cell:hover {
  outline: 1px solid var(--accent);
}
/* Zoomed-in view: let the spacetime grid expand to its full content size. */
.ca-spacetime.zoomed {
  max-height: none;
}