/* Shared microgame layouts. The homepage and playground use the same controls. */
.game__topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.game__topline .eyebrow {
  font-size: 0.6875rem;
  letter-spacing: 0.045em;
}

.game__shuffle,
.game__reset {
  border: 0;
  border-radius: 3px;
  background: transparent;
  color: var(--ink-2);
  font: inherit;
  font-size: 0.75rem;
  cursor: pointer;
  min-height: 2.75rem;
  padding: 0.5rem 0.25rem;
  text-decoration: underline;
  text-decoration-color: var(--rule);
  text-underline-offset: 0.25em;
}

.game__shuffle {
  flex-shrink: 0;
}

.game__shuffle:hover,
.game__reset:hover {
  color: var(--ink);
  text-decoration-color: var(--signal);
}

.minigame {
  container-type: inline-size;
}

.game__body {
  display: grid;
  gap: 1rem;
  min-height: 17rem;
}

.game__visual {
  min-width: 0;
  container-type: inline-size;
}

.game__controls {
  min-width: 0;
}

.game__control-title {
  display: none;
}

.minigame .replay__header > p:last-child {
  min-height: 4.5em;
}

.minigame .replay__result {
  min-height: 8em;
}

.replay__run[aria-disabled="true"] {
  opacity: 0.65;
  cursor: progress;
  transform: none;
}

.minigame[data-outcome="won"] .replay__result::before {
  content: '✓ ';
  font-weight: 700;
  color: var(--signal-ink);
}

.game__instruction {
  font-size: 0.8125rem;
  color: var(--ink-2);
  margin-block: 1rem 0.75rem;
}

.game__queue {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.375rem;
  margin-top: 0.75rem;
}

.game__queue li {
  display: grid;
  place-items: center;
  height: 2.5rem;
  border: 1px dashed var(--rule);
  background: var(--ground);
  color: var(--ink-2);
  border-radius: 2px;
}

.game__queue .is-filled {
  border-style: solid;
  border-color: var(--signal-ink);
  color: var(--signal-ink);
}

.game__output {
  min-height: 2.5rem;
  margin-top: 0.75rem;
  font-size: 1.5rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  overflow-wrap: anywhere;
}

.game__buffer {
  min-height: 1.5em;
  margin-top: 0.5rem;
  color: var(--ink-2);
  font-size: 0.75rem;
}

.game__choices,
.game__replicas {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
}

.game__choices--packets,
.game__replicas {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.game__choice,
.game__replica {
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 0.375rem;
  min-width: 0;
  min-height: 3rem;
  padding: 0.75rem 0.375rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--ground);
  color: var(--ink);
  font: inherit;
  cursor: pointer;
}

.game__choice:hover:not(:disabled),
.game__replica:hover {
  border-color: var(--ink);
}

.game__choice span,
.game__replica span {
  font-size: 0.6875rem;
  line-height: 1.5;
  color: var(--ink-2);
}

.game__choice:disabled {
  color: var(--ink-2);
  opacity: 0.6;
  cursor: default;
  border-style: dashed;
}

.game__choice.is-correct {
  border-color: var(--signal-ink);
  background: var(--panel);
}

.game__choice.is-wrong {
  border-style: dashed;
}

.game__memory {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: 4px;
  overflow: hidden;
}

.game__memory > div {
  display: grid;
  gap: 0.75rem;
  justify-items: center;
  padding: 1rem 0.5rem;
  background: var(--panel);
}

.game__memory span {
  color: var(--ink-2);
  font-size: 0.6875rem;
}

.game__memory code {
  font-size: 1.5rem;
  font-weight: 600;
}

.game__replica {
  min-height: 6rem;
  background: var(--panel);
  border-style: dashed;
}

.game__replica.is-online {
  border-style: solid;
  border-color: var(--signal-ink);
  background: var(--ground);
}

.game__replica strong {
  font-size: 1.5rem;
  line-height: 1.25;
}

.game__noscript {
  margin-top: 1.25rem;
  font-size: 0.875rem;
  color: var(--ink-2);
}

/* The standalone page gives the experiment a full workbench. */
.playground-page {
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
}

.playground-page > .site-header,
.playground-main,
.playground-page > .site-footer {
  max-width: 94rem;
}

.playground-main {
  padding-top: 1rem;
}

.playground-intro {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-lg);
  padding-block: var(--space-xl) 2.5rem;
}

.playground-intro h1 {
  margin-top: 0.5rem;
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 650;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.playground-intro h1 span {
  color: var(--signal-ink);
}

.playground-intro > p {
  max-width: 35ch;
  color: var(--ink-2);
  font-size: 1rem;
}

.playground-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-lg);
  align-items: start;
}

.playground-workspace,
.game-picker {
  min-width: 0;
}

.game-picker__label {
  margin-bottom: var(--space-md);
}

.game-picker ol {
  display: flex;
  overflow-x: auto;
  border-block: 1px solid var(--rule);
  scrollbar-width: thin;
}

.game-picker li {
  flex: 0 0 13rem;
}

.game-picker a {
  display: flex;
  align-items: start;
  gap: 0.75rem;
  padding: var(--space-md) 0.75rem;
  text-decoration: none;
  border-radius: 4px;
  min-height: 5.5rem;
}

.game-picker__number {
  font-size: 0.75rem;
  padding-top: 0.125rem;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}

.game-picker a > span:last-child {
  display: grid;
  gap: 0.375rem;
}

.game-picker strong {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.35;
}

.game-picker a > span:last-child > span {
  color: var(--ink-2);
  font-size: 0.75rem;
  line-height: 1.5;
}

.game-picker a:hover {
  background: var(--panel);
}

.game-picker a[aria-current] {
  background: var(--panel);
}

.game-picker a[aria-current] strong {
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-underline-offset: 0.25em;
}

.game-picker a[aria-current] .game-picker__number {
  color: var(--signal-ink);
}

.playground-layout .minigame {
  max-width: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--ground);
}

.playground-layout .replay__header {
  padding: clamp(1rem, 3vw, 2rem);
  border-bottom: 1px solid var(--rule);
}

.playground-layout .replay__header h2 {
  font-size: clamp(1.75rem, 2.5vw, 2.5rem);
  margin-top: 0.5rem;
}

.playground-layout .replay__header > p:last-child {
  min-height: 0;
  max-width: 70ch;
  font-size: 1rem;
  margin-top: 0.75rem;
}

.playground-layout .game__body {
  min-height: 0;
  padding: clamp(0.75rem, 2vw, 2rem);
  gap: var(--space-lg);
  align-items: start;
}

.playground-layout .game__visual {
  display: grid;
  align-content: center;
  min-height: 20rem;
  background: var(--panel);
  padding: clamp(0.75rem, 2vw, 1.5rem);
}

.playground-layout .game__visual .replay__state {
  margin-top: 0;
}

.playground-layout .game__visual .replay__state dd {
  font-size: 1.5rem;
}

.playground-layout .game__visual .replay__destination {
  padding: 1.25rem 0 0;
  border: 0;
  border-top: 1px solid var(--rule);
  border-radius: 0;
  background: transparent;
}

.playground-layout .replay__rows {
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.playground-layout .replay__rows li {
  flex-basis: clamp(2.5rem, 5vw, 4rem);
  height: clamp(2.5rem, 5vw, 4rem);
  font-size: 1.25rem;
}

.playground-layout .game__output {
  font-size: clamp(1.5rem, 4vw, 3rem);
  margin-top: 1.25rem;
}

.playground-layout .game__memory code {
  font-size: clamp(1.75rem, 4vw, 3rem);
}

.playground-layout .game__memory > div {
  padding-block: 2rem;
  background: var(--ground);
}

.playground-layout .game__replicas {
  gap: 1rem;
  align-items: center;
}

.playground-layout .game__replica {
  border-radius: 50%;
  aspect-ratio: 1;
  min-height: 0;
  max-width: 8rem;
  width: 100%;
  justify-self: center;
}

.playground-layout .game__controls {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--rule);
}

.playground-layout .game__control-title {
  display: block;
  font-size: 0.875rem;
  font-weight: 650;
  margin-bottom: var(--space-lg);
}

.playground-layout .game__controls .replay__modes {
  margin: 0 0 var(--space-md);
}

.playground-layout .game__controls .game__instruction {
  margin-top: 0;
  margin-bottom: var(--space-lg);
  font-size: 0.875rem;
  line-height: 1.6;
}

.playground-layout .game__controls .game__choices--packets {
  grid-template-columns: minmax(0, 1fr);
}

.playground-layout .game__choices--packets .game__choice {
  grid-template-columns: 1fr 1fr auto;
  justify-items: start;
  padding: 0.75rem;
}

.game__observation-label {
  display: none;
}

.playground-layout .game__observation {
  border-top: 1px solid var(--rule);
  padding: var(--space-lg) clamp(1rem, 3vw, 2rem);
}

.playground-layout .game__observation-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  font-size: 0.75rem;
  font-weight: 650;
  color: var(--ink-2);
}

.playground-layout [data-game-status] {
  border: 1px solid var(--rule);
  padding: 0.125rem 0.5rem;
  border-radius: 4px;
  font-size: 0.6875rem;
  font-weight: 500;
}

.playground-layout [data-outcome="won"] [data-game-status] {
  color: var(--signal-ink);
  border-color: var(--signal-ink);
}

.playground-layout .minigame .replay__result {
  min-height: 0;
  margin-top: 0.75rem;
  max-width: 75ch;
  font-size: 0.9375rem;
}

.playground-layout .replay figcaption {
  margin: 0;
  padding: 0.5rem clamp(1rem, 3vw, 2rem);
  background: var(--panel);
  font-size: 0.75rem;
}

.game-concept {
  display: grid;
  gap: 0.75rem 2rem;
  padding-top: var(--space-lg);
  margin-top: var(--space-lg);
}

.game-concept h2 {
  font-size: 0.875rem;
  font-weight: 650;
}

.game-concept p {
  color: var(--ink-2);
  max-width: 70ch;
  font-size: 0.9375rem;
}

.playground-page .project-outro {
  margin-top: 3rem;
}

.playground-page .site-footer {
  margin-top: 3rem;
}

.concept-notes {
  padding-top: 4rem;
}

.concept-notes dl {
  display: grid;
  gap: var(--space-lg);
}

.concept-notes dt {
  font-weight: 600;
}

.concept-notes dd {
  margin: 0.5rem 0 0;
  max-width: 65ch;
  color: var(--ink-2);
}

@media (min-width: 960px) {
  .playground-layout {
    grid-template-columns: 13rem minmax(0, 1fr);
    gap: var(--space-xl);
  }

  .game-picker {
    position: sticky;
    top: var(--space-lg);
  }

  .game-picker ol {
    display: block;
    overflow: visible;
    border: 0;
  }

  .game-picker li {
    border-top: 1px solid var(--rule);
  }

  .game-concept {
    grid-template-columns: 11rem minmax(0, 1fr);
  }
}

@container (min-width: 56rem) {
  .playground-layout .game__body {
    grid-template-columns: minmax(0, 1fr) 13rem;
    gap: 1.5rem;
  }

  .playground-layout .game__controls {
    border-top: 0;
    border-left: 1px solid var(--rule);
    padding-top: 0;
    padding-left: 1.5rem;
  }
}

/* Queue traffic remains visible even when the end-of-tick backlog is zero. */
.queue__heading {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.6875rem;
  color: var(--ink-2);
  margin-bottom: 1.5rem;
}

.queue__ticks {
  display: flex;
  gap: 0.375rem;
}

.queue__ticks li {
  padding: 0.125rem 0.375rem;
  border: 1px solid var(--rule);
  border-radius: 2px;
  font-variant-numeric: tabular-nums;
}

.queue__ticks .is-complete {
  color: var(--signal-ink);
  border-color: var(--signal-ink);
}

.queue__flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: center;
  gap: 0.75rem;
}

.queue__node {
  min-width: 0;
}

.queue__node h3 {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 650;
  line-height: 1.4;
}

.queue__node h3 span {
  font-size: 0.6875rem;
  color: var(--ink-2);
}

.queue__node > p,
.queue__node-note {
  display: block;
  color: var(--ink-2);
  font-size: 0.625rem;
  line-height: 1.5;
  margin-top: 0.25rem;
}

.queue__events {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-block: 0.75rem;
}

.queue__events li {
  display: grid;
  place-items: center;
  width: 1.875rem;
  height: 2rem;
  background: var(--ground);
  border: 1px solid var(--rule);
  border-radius: 2px;
  font-size: 0.8125rem;
}

.queue__events .is-processed {
  background: var(--signal);
  border-color: var(--signal-ink);
  color: #161B33;
}

.queue__events .is-idle,
.queue__events.is-preview li {
  background: transparent;
  border-style: dashed;
  color: var(--ink-2);
}

.queue__buffer .game__queue {
  margin-block: 0.75rem;
}

.queue__buffer .game__queue li {
  height: 2rem;
  font-size: 0.8125rem;
}

.queue__arrow {
  justify-self: center;
  color: var(--signal-ink);
  font-size: 1.25rem;
  line-height: 1;
  transform: rotate(90deg);
}

.queue__caption {
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--ink-2);
  margin-top: 1.25rem;
}

.queue__totals {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
  margin: 1rem 0 0;
}

.queue__totals dt {
  font-size: 0.625rem;
  color: var(--ink-2);
}

.queue__totals dd {
  font-size: 1rem;
  font-weight: 650;
  margin: 0.125rem 0 0;
  font-variant-numeric: tabular-nums;
}

.queue__ledger {
  display: none;
}

.playground-layout .queue__ledger {
  display: block;
  margin-top: 1.5rem;
  border-top: 1px solid var(--rule);
}

.queue__ledger table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.625rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.queue__ledger caption {
  text-align: left;
  padding-block: 1rem 0.5rem;
  color: var(--ink-2);
}

.queue__ledger th,
.queue__ledger td {
  padding: 0.5rem 0.125rem;
  border-bottom: 1px solid var(--rule);
}

.queue__ledger th {
  font-weight: 500;
  color: var(--ink-2);
}

.queue__ledger th:first-child {
  text-align: left;
}

.queue__ledger tbody tr:not(.is-recorded) {
  color: var(--ink-2);
}

@container (min-width: 32rem) {
  .queue__flow {
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1.6fr) auto minmax(0, 1fr);
    gap: 0.75rem;
  }

  .queue__arrow {
    transform: none;
  }

  .queue__buffer .game__queue {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .queue__node h3 {
    font-size: 0.875rem;
  }

  .queue__ledger table {
    font-size: 0.75rem;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .queue-lab[data-queue-phase="arriving"] .queue__buffer .is-filled {
    animation: event-arrive 240ms var(--ease-out) both;
  }

  .queue-lab[data-queue-phase="processing"] .is-processing {
    animation: event-process 240ms var(--ease-out) both;
  }

  @keyframes event-arrive {
    from { opacity: 0.2; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
  }

  @keyframes event-process {
    from { opacity: 1; }
    to { opacity: 0.35; transform: translateY(4px); }
  }
}

/* The homepage keeps the same flow in a compact, three-row presentation. */
[data-game-host="random"] .queue__flow {
  gap: 0.25rem;
}

[data-game-host="random"] .queue__node {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  align-items: center;
  gap: 0.5rem;
}

[data-game-host="random"] .queue__node > p,
[data-game-host="random"] .queue__node-note,
[data-game-host="random"] .queue__node h3 span {
  display: none;
}

[data-game-host="random"] .queue__node h3 {
  font-size: 0.6875rem;
}

[data-game-host="random"] .queue__events,
[data-game-host="random"] .queue__buffer .game__queue {
  margin-block: 0.25rem;
}

[data-game-host="random"] .queue__arrow {
  font-size: 1rem;
}

.playground-layout .queue__node > p,
.playground-layout .queue__node-note {
  font-size: 0.6875rem;
}

.playground-layout .queue__node h3 {
  font-size: 0.9375rem;
}

.playground-layout .queue__events li {
  width: 2rem;
  height: 2.5rem;
  font-size: 0.9375rem;
}

.playground-layout .queue__buffer .game__queue li {
  height: 2.5rem;
  font-size: 1rem;
}

.playground-layout .queue__totals dt {
  font-size: 0.6875rem;
}

.playground-layout .queue__totals dd {
  font-size: 1.25rem;
}

@container (min-width: 32rem) {
  .playground-layout .queue__ledger table {
    font-size: 0.8125rem;
  }
}

@container (max-width: 55.99rem) {
  .playground-layout [data-game="queue"] .game__controls {
    grid-row: 1;
    padding-top: 0;
    padding-bottom: 1rem;
    border-top: 0;
    border-bottom: 1px solid var(--rule);
  }

  .playground-layout [data-game="queue"] .game__control-title,
  .playground-layout [data-game="queue"] .game__controls .game__instruction {
    display: none;
  }
}

@container (min-width: 18rem) and (max-width: 31.99rem) {
  .playground-layout .queue__flow {
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1.6fr) auto minmax(0, 1fr);
    gap: 0.375rem;
  }

  .playground-layout .queue__arrow {
    transform: none;
    font-size: 1rem;
  }

  .playground-layout .queue__buffer .game__queue {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .playground-layout .queue__node h3 {
    font-size: 0.6875rem;
  }

  .playground-layout .queue__node > p,
  .playground-layout .queue__node-note {
    font-size: 0.5625rem;
  }

  .playground-layout .queue__events li {
    width: 1.5rem;
    height: 2rem;
    font-size: 0.75rem;
  }

  .playground-layout .queue__buffer .game__queue li {
    height: 2rem;
    font-size: 0.75rem;
  }
}

@container (max-width: 31.99rem) {
  .playground-layout .queue__ledger tbody tr:not(.is-recorded) {
    display: none;
  }
}

.game__replica-setting {
  margin-bottom: 1.25rem;
}

.game__replica-setting > p {
  color: var(--ink-2);
  font-size: 0.8125rem;
  margin-bottom: 0.5rem;
}

.game__stepper {
  display: grid;
  grid-template-columns: 2.75rem minmax(0, 1fr) 2.75rem;
  align-items: center;
  gap: 0.25rem;
}

.game__stepper button {
  min-height: 2.75rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--ground);
  color: var(--ink);
  font: inherit;
  font-size: 1.25rem;
  cursor: pointer;
}

.game__stepper button:hover:not(:disabled) {
  border-color: var(--ink);
}

.game__stepper button:disabled {
  opacity: 0.4;
  cursor: default;
}

.game__stepper output {
  text-align: center;
  font-size: 0.875rem;
  font-weight: 600;
}

.playground-layout .game__replicas:not([data-count="3"]) .game__replica {
  max-width: 6rem;
  padding: 0.5rem 0.25rem;
  gap: 0.25rem;
}