:root {
  --bg: #f3eee4;
  --bg-2: #ebe4d6;
  --ink: #1a1612;
  --muted: #6b6258;
  --line: #cfc4b2;
  --accent: #8c2f0d;
  --ok: #1f4d32;
  --err: #8c2f0d;
  --font: 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
  --mono: ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.45;
}

a {
  color: var(--accent);
}

.mast,
main,
footer {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
}

.mast {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--muted);
}

h2 {
  margin: 0 0 0.5rem;
  font-size: 1.65rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

h3 {
  margin: 1.75rem 0 0.4rem;
  font-size: 1.15rem;
  font-weight: 600;
}

.lede {
  max-width: 42rem;
  margin: 0 0 1.5rem;
  color: var(--muted);
}

.tabs {
  display: flex;
  gap: 1.5rem;
}

.tabs button {
  appearance: none;
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: 0.4rem 0;
  font: inherit;
  font-size: 1.15rem;
  color: var(--muted);
  cursor: pointer;
}

.tabs button[aria-selected='true'] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.panel {
  padding: 1.75rem 0 3rem;
}

.demo-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.5rem;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--muted);
}

textarea,
input,
select,
button {
  font-family: var(--mono);
  font-size: 0.92rem;
}

textarea,
input,
select {
  width: 100%;
  border: 1px solid var(--line);
  background: #fffdf8;
  color: var(--ink);
  padding: 0.55rem 0.65rem;
  border-radius: 2px;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

fieldset {
  border: 1px solid var(--line);
  padding: 0.75rem;
  margin: 0;
}

legend {
  padding: 0 0.35rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.ops {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.ops button,
#bench-run,
#bench-libs-toggle {
  appearance: none;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
  padding: 0.35rem 0.65rem;
  cursor: pointer;
}

.ops button:hover,
#bench-run:hover,
#bench-libs-toggle:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.result-card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  padding: 1.1rem 1.2rem;
  min-height: 16rem;
}

.result-label {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.72rem;
  color: var(--muted);
}

.result-body {
  margin: 0.7rem 0;
  white-space: pre-wrap;
  word-break: break-all;
  font-family: var(--mono);
  font-size: 0.95rem;
}

.result-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.result-error {
  color: var(--err);
  margin: 0.5rem 0 0;
}

.bench-copy {
  max-width: 46rem;
  color: var(--muted);
}

.bench-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: end;
  margin: 1rem 0;
}

.bench-controls label {
  min-width: 10rem;
}

.split-run {
  position: relative;
  display: inline-flex;
  align-items: stretch;
}

#bench-run {
  border-right-width: 0;
}

#bench-libs-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.45rem;
  border-left: 1px solid rgba(243, 238, 228, 0.35);
}

#bench-libs-toggle[aria-expanded='true'] svg {
  transform: rotate(180deg);
}

.split-run:hover #bench-run,
.split-run:hover #bench-libs-toggle {
  background: var(--accent);
  border-color: var(--accent);
}

.split-run:focus-within #bench-run,
.split-run:focus-within #bench-libs-toggle {
  outline: none;
}

#bench-run:disabled,
#bench-libs-toggle:disabled {
  opacity: 0.5;
  cursor: wait;
}

.libs-popover {
  position: absolute;
  top: calc(100% + 0.35rem);
  right: 0;
  z-index: 8;
  min-width: 12.5rem;
  padding: 0.45rem 0.35rem;
  background: #fffdf8;
  border: 1px solid var(--ink);
  box-shadow: 3px 3px 0 rgba(26, 22, 18, 0.12);
}

.libs-popover label {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
  padding: 0.35rem 0.5rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink);
  cursor: pointer;
}

.libs-popover label:hover {
  background: var(--bg-2);
}

.libs-popover input {
  width: auto;
  margin: 0;
  accent-color: var(--ink);
}

.bench-status {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ok);
  min-height: 1.4em;
}

.bench-grid {
  --lib-count: 4;
  display: grid;
  grid-template-columns: 7.5rem 9.5rem minmax(12rem, 1fr);
  width: 100%;
  font-family: var(--mono);
  font-size: 0.82rem;
  align-items: center;
}

.bench-grid > .bench-h {
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid var(--ink);
  font-weight: 600;
  color: var(--muted);
}

.bench-grid > .op {
  grid-column: 1;
  grid-row: span var(--lib-count);
  align-self: start;
  padding: 0.55rem 0.5rem 0.4rem;
  font-weight: 600;
}

.bench-grid > .lib {
  grid-column: 2;
  padding: 0.4rem 0.5rem;
  color: var(--muted);
  white-space: nowrap;
}

.bench-grid > .metric {
  grid-column: 3;
  padding: 0.4rem 0.5rem;
  min-width: 0;
}

.bench-grid > .lib:not(.op-end),
.bench-grid > .metric:not(.op-end) {
  border-bottom: 1px solid var(--bg-2);
}

.bench-grid > .op {
  border-top: 1px solid var(--line);
}

.bench-grid > .bench-h:nth-child(3) + .op {
  border-top: 0;
}

.bench-grid > .metric.op-end + .op + .lib,
.bench-grid > .metric.op-end + .op + .lib + .metric {
  border-top: 1px solid var(--line);
}

.metric-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.metric-row .time {
  flex: 0 0 6.25rem;
  text-align: right;
  color: rgba(0, 0, 0, 0.5);
}

.bar-track {
  flex: 1;
  min-width: 0;
  height: 6px;
  background: var(--bg-2);
}

.bar-track .bar {
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
}

.bench-grid > .lib.fast {
  font-weight: 700;
  color: var(--ok);
}

.bench-grid .fast .time {
  font-weight: 700;
  color: var(--ok);
}

.bench-grid .fast .bar {
  background: var(--ok);
}

.bench-grid .fail .time {
  color: var(--err);
  font-weight: 700;
}

.bench-grid .na .time {
  color: var(--muted);
}

.analysis {
  margin-top: 2.75rem;
  padding-top: 2rem;
  border-top: 1px solid var(--ink);
}

.analysis .result-label {
  margin-bottom: 0.35rem;
}

.analysis .bench-copy {
  margin: 0 0 1.1rem;
}

.callout {
  max-width: 46rem;
  margin: 0 0 1.5rem;
  padding: 0.85rem 1rem 0.9rem 1.05rem;
  background: var(--bg-2);
  border-left: 3px solid var(--ink);
}

.callout-title {
  margin: 0 0 0.35rem;
  font-weight: 600;
}

.callout p:last-child {
  margin: 0;
  color: var(--muted);
}

.analysis-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 0 0 0.5rem;
  max-width: 46rem;
}

.analysis-stat {
  margin: 0;
  font-size: 1.85rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--ok);
}

.analysis-stats p:last-child {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.analysis-caption {
  max-width: 46rem;
  margin: 0 0 0.85rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.vchart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.25rem;
  margin: 0 0 0.75rem;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
}

.vchart-legend i {
  display: inline-block;
  width: 0.7rem;
  height: 0.7rem;
  margin-right: 0.4rem;
  vertical-align: -0.05rem;
}

.vchart-legend .swatch-jsbn {
  background: var(--ok);
}

.vchart-legend .swatch-bnjs {
  background: var(--ink);
}

.vchart-legend .swatch-biginteger {
  background: var(--accent);
}

.vchart {
  display: grid;
  grid-template-columns: repeat(var(--cols, 4), minmax(0, 1fr));
  gap: 0.75rem;
  align-items: end;
  height: 14rem;
  margin: 0 0 0.5rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--line);
}

.vchart-col {
  display: flex;
  flex-direction: column;
  justify-content: end;
  min-width: 0;
  height: 100%;
}

.vchart-bars {
  display: flex;
  align-items: end;
  justify-content: center;
  gap: 0.2rem;
  height: 100%;
}

.vbar {
  flex: 1;
  max-width: 1.15rem;
  min-height: 2px;
}

.vbar-jsbn {
  background: var(--ok);
}

.vbar-bnjs {
  background: var(--ink);
}

.vbar-biginteger {
  background: var(--accent);
}

.vchart-name {
  margin-top: 0.4rem;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.analysis-table-wrap {
  overflow-x: auto;
  margin: 0 0 0.5rem;
}

.analysis-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.82rem;
}

.analysis-table th,
.analysis-table td {
  padding: 0.45rem 0.55rem;
  text-align: right;
  border-bottom: 1px solid var(--bg-2);
}

.analysis-table th:first-child,
.analysis-table td:first-child {
  text-align: left;
  font-weight: 600;
}

.analysis-table thead th {
  border-bottom: 1px solid var(--ink);
  color: var(--muted);
  font-weight: 600;
}

.analysis-table .fast {
  font-weight: 700;
  color: var(--ok);
}

.analysis-table .na {
  color: var(--muted);
}

footer {
  padding: 0 0 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 800px) {
  .demo-grid,
  .row,
  .analysis-stats {
    grid-template-columns: 1fr;
  }
}