:root {
  color-scheme: light dark;
  --bg: #f8fafc;
  --panel: #ffffff;
  --text: #172033;
  --muted: #607089;
  --border: #d9e1ec;
  --accent: #1769aa;
  --accent-2: #0b6b57;
  --warn: #8a5a00;
}

* {
  box-sizing: border-box;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
  margin: 0;
}

.bpe-widget {
  margin: 0 auto;
  max-width: 1100px;
  padding: 18px;
}

.widget-header,
.sequence-grid,
.details-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.widget-header {
  align-items: end;
  margin-bottom: 14px;
}

.eyebrow {
  color: var(--accent-2);
  font-size: 12px;
  font-weight: 750;
  margin: 0 0 4px;
  text-transform: uppercase;
}

h1,
h2 {
  line-height: 1.2;
  margin: 0;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 15px;
  margin-bottom: 8px;
}

.metric-row,
.controls,
.selected-pair,
.sequence-panel,
.details-grid > div {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.metric-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  padding: 10px;
}

.metric-row span {
  color: var(--muted);
  font-size: 13px;
}

.metric-row strong {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.controls,
.selected-pair {
  align-items: center;
  display: grid;
  gap: 10px;
  grid-template-columns: auto minmax(0, 1fr) auto;
  margin-bottom: 14px;
  padding: 12px;
}

.controls label,
.selected-pair span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

input[type="range"] {
  width: 100%;
}

.selected-pair {
  grid-template-columns: auto minmax(0, 1fr);
}

#selected-pair {
  color: var(--accent);
  overflow-wrap: anywhere;
}

.sequence-grid,
.details-grid {
  margin-top: 14px;
}

.sequence-panel {
  min-height: 160px;
  padding: 12px;
}

.sequence-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 10px;
}

.tile {
  background: #eaf4fb;
  border: 1px solid #bdd8ec;
  border-radius: 5px;
  color: #10243b;
  display: inline-flex;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1;
  max-width: 100%;
  min-height: 24px;
  overflow-wrap: anywhere;
  padding: 6px 7px;
}

.tile.selected {
  background: #fff2cf;
  border-color: #e0b74e;
}

.details-grid > div {
  padding: 12px;
}

.pair-list {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
  margin: 0;
  padding-left: 20px;
}

.pair-list strong {
  color: var(--text);
}

textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
  margin-bottom: 10px;
  padding: 9px;
  resize: vertical;
  width: 100%;
}

.encoded-output {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101418;
    --panel: #171d24;
    --text: #f2f6fb;
    --muted: #a7b4c4;
    --border: #2b3542;
    --accent: #67b7dc;
    --accent-2: #7dd3b0;
  }

  .tile {
    background: #193246;
    border-color: #2b5f85;
    color: #f2f6fb;
  }

  .tile.selected {
    background: #4a3a18;
    border-color: #9b7628;
  }
}

@media (max-width: 760px) {
  .widget-header,
  .sequence-grid,
  .details-grid {
    grid-template-columns: 1fr;
  }

  .metric-row {
    justify-content: flex-start;
  }
}