:root {
  --baize: #1d4a37;
  --baize-light: #26603f;
  --baize-deep: #133226;
  --stock: #f6f4ef;
  --stock-edge: #dcd7cb;
  --ink: #1e2320;
  --ink-soft: #5a615c;
  --chalk: #edf2ee;
  --chalk-soft: #b4c6bb;
  --thief: #c62f3b;
  --thief-tint: #f5dcd9;
  --innocent: #24508a;
  --pass: #2e7a4c;
  --void: #d6d1c5;
  --empty: #ece8df;
  --brass: #d6b04a;
  --brass-dark: #a3822a;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  background: var(--baize-deep);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  padding: 0 16px env(safe-area-inset-bottom);
  background: radial-gradient(ellipse 140% 90% at 50% 0%, var(--baize-light), var(--baize) 50%, var(--baize-deep)) no-repeat;
  color: var(--chalk);
  font: 1rem/1.5 var(--sans);
}

h1,
h2 {
  font-family: var(--serif);
  font-weight: 600;
  margin: 0;
}

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

button:focus-visible,
summary:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 3px solid var(--brass);
  outline-offset: 3px;
}

/* Masthead */

.masthead {
  max-width: 36rem;
  margin: 0 auto;
  padding: 1.75rem 0 1.25rem;
  text-align: center;
}

.masthead h1 {
  font-size: clamp(2rem, 8.5vw, 3.25rem);
  font-style: italic;
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.01em;
}

.premise {
  text-wrap: balance;
  margin: 1rem auto 1.25rem;
  max-width: 32rem;
  color: var(--chalk-soft);
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.55;
}

.modes {
  display: inline-flex;
  padding: 3px;
  border: 1px solid rgb(237 242 238 / 0.3);
  border-radius: 999px;
}

.modes button {
  border: 0;
  border-radius: 999px;
  background: none;
  padding: 0.55rem 1.15rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.modes button[aria-selected="true"] {
  background: var(--stock);
  color: var(--ink);
}

main {
  max-width: 64rem;
  margin: 0 auto;
}

.setup-lead {
  text-wrap: balance;
  margin: 0.85rem 0 0.9rem;
  color: var(--chalk-soft);
  font-family: var(--serif);
  font-size: 1.05rem;
}

.staff {
  display: flex;
  justify-content: center;
  gap: 0.3rem;
  margin: 0 0 0.25rem;
  padding: 0;
  list-style: none;
}

.staff li {
  flex: 0 1 2.5rem;
  min-width: 0;
}

.staff img {
  display: block;
  width: 100%;
  height: auto;
  padding: 3px;
  border-radius: 50%;
  background: var(--stock);
}

.accuracy {
  display: inline-grid;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  text-align: left;
}

.accuracy li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font: 1rem/1.35 var(--serif);
}

.accuracy img {
  flex: none;
  width: 2rem;
  height: 2rem;
  padding: 3px;
  border-radius: 50%;
  background: var(--stock);
}

/* The lie detector report for one employee */

.draw {
  text-align: center;
}

.stage {
  display: grid;
  place-items: center;
  padding: 0.25rem 0 0.5rem;
}

.report {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.7rem;
  width: min(100%, 20rem);
  padding: 1.1rem 1rem 1rem;
  border-radius: 0.45rem;
  background: var(--stock);
  color: var(--ink);
  box-shadow:
    0 2px 3px rgb(0 0 0 / 0.25),
    0 12px 28px rgb(0 0 0 / 0.35);
}

.report p {
  margin: 0;
}

.portrait {
  width: 7.5rem;
  height: 7.5rem;
  perspective: 800px;
}

.portrait-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.3, 0.7, 0.3, 1);
}

.portrait-inner.flipped {
  transform: rotateY(180deg);
}

.portrait-inner.no-transition {
  transition: none;
}

.portrait-face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: 50%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.portrait-face.front {
  overflow: hidden;
  background: var(--stock-edge);
}

.portrait-face.front svg {
  width: 100%;
  height: 100%;
  fill: var(--ink-soft);
  opacity: 0.55;
}

.portrait-face.back {
  background: var(--empty);
  box-shadow: inset 0 0 0 2px var(--stock-edge);
  transform: rotateY(180deg);
}

.portrait-face.back img {
  width: 82%;
  height: 82%;
}

.report-name {
  color: var(--ink-soft);
  font: italic 1rem/1.2 var(--serif);
  font-variant-numeric: tabular-nums;
}

/* The polygraph's strip chart, with the result stamped across it. */
.strip {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  height: 5.5rem;
  border-block: 1px solid var(--stock-edge);
  background-image:
    linear-gradient(var(--stock-edge) 1px, transparent 1px),
    linear-gradient(90deg, var(--stock-edge) 1px, transparent 1px);
  background-size: 12px 11px;
  background-position: 0 -1px;
}

.strip svg {
  position: absolute;
  inset: 0.4rem 0;
  width: 100%;
  height: calc(100% - 0.8rem);
}

.strip path {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.6;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.stamp {
  position: relative;
  padding: 0.3em 0.45em 0.25em;
  border: 0.12em solid currentColor;
  border-radius: 0.25em;
  background: rgb(246 244 239 / 0.85);
  box-shadow:
    inset 0 0 0 0.07em var(--stock),
    inset 0 0 0 0.14em currentColor;
  font: 800 2.4rem/1 var(--sans);
  letter-spacing: 0.06em;
  transform: rotate(-9deg);
}

.stamp.fail {
  color: var(--thief);
}

.stamp.pass {
  color: var(--pass);
}

.stamp.slam {
  animation: slam 0.25s ease-out;
}

@keyframes slam {
  from { opacity: 0; transform: rotate(-9deg) scale(1.6); }
  to { opacity: 1; transform: rotate(-9deg) scale(1); }
}

.status {
  min-height: 1.6em;
  margin: 0.75rem 0 1rem;
  font: italic 1.25rem/1.3 var(--serif);
}

.primary {
  min-width: 14rem;
  padding: 1rem 2rem;
  border: 0;
  border-radius: 999px;
  background: var(--brass);
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 650;
  box-shadow: 0 3px 0 var(--brass-dark);
}

.primary:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--brass-dark);
}

.primary:disabled {
  opacity: 0.6;
  cursor: default;
}

.tally {
  max-width: 26rem;
  margin: 2.25rem auto 0;
  padding-top: 1.25rem;
  border-top: 1px solid rgb(237 242 238 / 0.2);
}

.tally h2 {
  font-size: 1.1rem;
  font-weight: 500;
  font-style: italic;
  color: var(--chalk-soft);
}

.tally dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin: 0.75rem 0 0.5rem;
}

.tally dl div {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.tally dd {
  order: -1;
}

.tally dt {
  color: var(--chalk-soft);
  font-size: 0.8rem;
  line-height: 1.3;
}

.tally dd {
  margin: 0;
  font: 2rem/1 var(--serif);
  font-variant-numeric: tabular-nums;
}

.text-btn {
  border: 0;
  background: none;
  padding: 0.5rem;
  color: var(--chalk-soft);
  font-size: 0.9rem;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

/* Simulate mode */

.simulate {
  display: grid;
  gap: 1.25rem;
  padding-bottom: 1rem;
}

@media (min-width: 54rem) {
  .simulate {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    column-gap: 2rem;
  }

  .simulate .answer {
    grid-column: 1 / -1;
  }
}

.sim-left,
.sim-right {
  display: grid;
  gap: 1.25rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.6rem 0.9rem;
}

.controls-label {
  font: italic 1.2rem/1 var(--serif);
}

.chips {
  display: flex;
  gap: 0.55rem;
}

.chip {
  display: grid;
  place-items: center;
  width: 3.6rem;
  height: 3.6rem;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background:
    radial-gradient(circle, var(--stock) 0 54%, transparent 55%),
    repeating-conic-gradient(var(--ink) 0 15deg, var(--stock) 15deg 45deg);
  color: var(--ink);
  font: 600 1rem/1 var(--serif);
  font-variant-numeric: lining-nums;
  box-shadow:
    0 0 0 2px var(--ink),
    0 3px 0 2px var(--baize-deep);
}

.chip[data-k="1000"] {
  font-size: 0.85rem;
}

.chip:active {
  transform: translateY(2px);
  box-shadow:
    0 0 0 2px var(--ink),
    0 1px 0 2px var(--baize-deep);
}

.chip:disabled {
  opacity: 0.55;
  cursor: default;
}

.latest {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.mini {
  margin: 0;
  text-align: center;
}

.mini figcaption {
  margin-top: 0.5rem;
  color: var(--chalk-soft);
  font-size: 0.85rem;
}

.slip,
.disc {
  display: grid;
  place-items: center;
  height: 5rem;
  background: var(--stock);
  box-shadow: 0 6px 16px rgb(0 0 0 / 0.3);
}

.slip {
  width: 7.5rem;
  border-radius: 0.35rem;
}

.disc {
  width: 5rem;
  border-radius: 50%;
}

.disc img {
  width: 80%;
  height: 80%;
}

.slip .stamp {
  font-size: 1.1rem;
}

.placeholder {
  color: var(--ink-soft);
  font: italic 2rem/1 var(--serif);
}

.estimate {
  text-align: center;
}

.fraction {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.6rem;
  margin: 0;
  font-family: var(--serif);
  font-size: 2.6rem;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.frac {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  vertical-align: middle;
}

.frac > span:first-child {
  padding: 0 0.2em 0.08em;
  border-bottom: 0.06em solid currentColor;
}

.frac > span:last-child {
  padding: 0.08em 0.2em 0;
}

.summary {
  max-width: 26rem;
  margin: 0.85rem auto 0;
  color: var(--chalk-soft);
  font-family: var(--serif);
  font-size: 1.05rem;
}

.sheet {
  margin: 0;
  padding: 1rem 1.1rem 1.1rem;
  border-radius: 0.45rem;
  background: var(--stock);
  color: var(--ink);
  box-shadow: 0 8px 22px rgb(0 0 0 / 0.3);
}

.sheet h2 {
  font-size: 1.15rem;
}

.sheet figcaption {
  color: var(--ink-soft);
  font-size: 0.875rem;
}

.sheet-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 1rem;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--ink-soft);
  font-size: 0.875rem;
  cursor: pointer;
}

.toggle input {
  width: 1.05rem;
  height: 1.05rem;
  margin: 0;
  accent-color: var(--innocent);
}

#chart {
  display: block;
  width: 100%;
  margin: 0.6rem 0 0.4rem;
  overflow: visible;
  font-family: var(--sans);
}

#waffle {
  display: block;
  width: 100%;
  max-width: 26rem;
  aspect-ratio: 1;
  margin: 0.75rem auto;
}

.legend {
  display: grid;
  gap: 0.3rem;
  margin: 0 0 0.25rem;
  padding: 0;
  list-style: none;
}

.legend li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.legend b {
  margin-left: auto;
  color: var(--ink);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.swatch {
  flex: none;
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 0.15rem;
}

.swatch.thief { background: var(--thief); }
.swatch.innocent { background: var(--innocent); }
.swatch.void { background: var(--void); }

.answer summary {
  font: 600 1.15rem/1.3 var(--serif);
  cursor: pointer;
}

.answer p {
  max-width: 40rem;
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.6;
}

/* 100 employees: the top row are the thieves; highlighted cells fail the test. */
.grid100 {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 3px;
  max-width: 24rem;
  margin: 1rem 0;
}

.grid100 span {
  padding: 3px;
  border-radius: 0.3rem;
}

.grid100 img {
  display: block;
  width: 100%;
  height: auto;
}

.grid100 .fail {
  background: var(--thief-tint);
  box-shadow: inset 0 0 0 2px var(--thief);
}

.grid100 .pass img {
  opacity: 0.3;
  filter: grayscale(1);
}

.formula {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.colophon {
  padding: 2.5rem 0 1.5rem;
  color: var(--chalk-soft);
  font-size: 0.85rem;
  text-align: center;
}

@media (prefers-reduced-motion: reduce) {
  .portrait-inner {
    transition: none;
  }

  .stamp.slam {
    animation: none;
  }
}