:root {
  --sim-ant: #b04a24;
}

:root:not([data-theme='light']) {
  --sim-ant: #f0a271;
}

.sim-brand {
  display: flex;
  align-items: center;
  gap: .9rem;
  min-width: 0;
}

.sim-brand__sep {
  flex: none;
  width: 1px;
  height: 22px;
  background: var(--line-strong);
}

.sim-brand__name {
  font-size: 1.55rem;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -.02em;
  white-space: nowrap;
  color: var(--ink);
}

.site-header .theme-toggle {
  margin-left: auto;
}

.sim-brand .brand {
  flex: none;
}

@media (width <= 480px) {
  .sim-brand {
    gap: .5rem;
  }

  .sim-brand .brand__logo {
    height: 12px;
  }

  .sim-brand__sep {
    height: 18px;
  }

  .sim-brand__name {
    font-size: 1.1rem;
  }
}

@media (width <= 400px) {
  .sim-brand {
    gap: .4rem;
  }

  .sim-brand .brand__logo {
    height: 10px;
  }

  .sim-brand__name {
    font-size: 1rem;
  }
}

.sim-page {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100svh;
  padding-top: calc(var(--header-h) + clamp(2rem, 6vw, 4rem));
  overflow: clip;
}

.sim-page > .ruler {
  margin-top: auto;
}

.sim-page .hero__grid {
  bottom: auto;
  height: 32rem;
}

.sim__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  padding-bottom: clamp(2rem, 4vw, 3rem);
}

.sim__nav-title {
  margin-bottom: .75rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
}

.sim__tabs {
  display: none;
}

.sim__tab {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: .75rem;
  width: 100%;
  padding: .6rem 0 .6rem .9rem;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: none;
  font-size: .95rem;
  line-height: 1.6;
  text-align: left;
  color: var(--ink-2);
  cursor: pointer;
  transition: color .25s var(--ease);
}

.sim__tab::before {
  content: '';
  position: absolute;
  left: 0;
  top: .55rem;
  bottom: .55rem;
  width: 2px;
  background: var(--accent);
  transform: scaleY(0);
  transition: transform .3s var(--ease-out);
}

.sim__tab-num {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--muted);
  transition: color .25s var(--ease);
}

.sim__tab[aria-selected='true'] {
  color: var(--ink);
}

.sim__tab[aria-selected='true']::before {
  transform: scaleY(1);
}

.sim__tab[aria-selected='true'] .sim__tab-num {
  color: var(--accent);
}

@media (hover: hover) and (pointer: fine) {
  .sim__tab:hover {
    color: var(--accent);
  }

  .sim__tab:hover .sim__tab-num {
    color: var(--accent);
  }
}

@media (width >= 900px) {
  .sim__layout {
    grid-template-columns: 15rem minmax(0, 1fr);
    gap: clamp(3rem, 5vw, 5rem);
  }

  .sim__nav {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
    align-self: start;
  }

  .sim__picker {
    display: none;
  }

  .sim__tabs {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--line);
  }
}

.sim-panel {
  display: grid;
  gap: 1.5rem;
  min-width: 0;
}

.sim-panel:focus {
  outline: none;
}

.sim-card {
  min-width: 0;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.sim-card__title {
  display: flex;
  align-items: baseline;
  gap: .9rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
  font-size: clamp(1.25rem, 2.2vw, 1.5rem);
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -.025em;
}

.sim-card__num {
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--accent);
}

.sim-select {
  width: 100%;
  min-height: 46px;
  padding: .6rem 2.5rem .6rem .9rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background-color: var(--bg);
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 1.15rem) 50%, calc(100% - .8rem) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  font-size: 1rem;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
  transition: border-color .25s var(--ease), background-color .25s var(--ease), box-shadow .25s var(--ease);
}

.sim-select option {
  background: var(--surface);
  color: var(--ink);
}

.sim-select:hover {
  border-color: var(--muted);
}

.sim-select:focus {
  outline: none;
  border-color: var(--accent);
  background-color: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.sim-input {
  width: 100%;
  min-height: 46px;
  padding: .6rem .9rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background-color: var(--bg);
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink);
  transition: border-color .25s var(--ease), background-color .25s var(--ease), box-shadow .25s var(--ease);
}

.sim-input:hover {
  border-color: var(--muted);
}

.sim-input:focus {
  outline: none;
  border-color: var(--accent);
  background-color: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.sim-input[aria-invalid='true'] {
  border-color: var(--error);
}

.sim-legend {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem .6rem;
  margin-top: .65rem;
}

.sim-legend__item {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--ink-2);
}

.sim-legend__item i {
  width: 12px;
  height: 12px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: var(--bg);
}

.sim-legend__item .sim-legend__grains1 {
  background: color-mix(in srgb, var(--accent) 30%, var(--bg));
}

.sim-legend__item .sim-legend__grains2 {
  background: color-mix(in srgb, var(--accent) 60%, var(--bg));
}

.sim-legend__item .sim-legend__grains3 {
  background: var(--accent);
}

.sim-legend__item .sim-legend__wire {
  background: color-mix(in srgb, var(--accent) 35%, var(--bg));
}

.sim-legend__item .sim-legend__head {
  background: var(--ink);
}

.sim-legend__item .sim-legend__firing {
  background: var(--ink);
}

.sim-legend__item .sim-legend__dying {
  background: var(--accent);
}

.sim-legend__item .sim-legend__litter {
  background: var(--accent);
}

.sim-legend__item .sim-legend__ant {
  background: var(--sim-ant);
}

.sim-legend__item .sim-legend__carrying {
  background: var(--ink);
}

.sim-card__grid {
  display: grid;
  gap: 2rem;
}

.sim-card__controls {
  display: grid;
  align-content: start;
  gap: 1.25rem;
  min-width: 0;
}

.sim-card__controls > .switch {
  justify-self: start;
}

@media (width < 1100px) {
  .sim-card__grid {
    gap: 1.25rem;
  }

  .sim-card__controls {
    display: contents;
  }

  .sim-card__controls > * {
    order: 3;
  }

  .sim-card__controls > .sim-actions {
    order: 1;
  }

  .sim-result {
    order: 2;
    margin-bottom: .75rem;
  }
}

@media (width >= 1100px) {
  .sim-card__grid {
    grid-template-columns: minmax(0, 17rem) minmax(0, 1fr);
    gap: 2.5rem;
  }
}

.sim-label {
  display: block;
  margin-bottom: .5rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .06em;
  line-height: 1.6;
  text-transform: uppercase;
  color: var(--muted);
}

.sim-label output {
  margin-left: .35rem;
  color: var(--ink);
}

.sim-hint {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--muted);
}

.sim-rules ol {
  margin: .35rem 0;
  padding-left: 2em;
  list-style: decimal;
}

.sim-rules li + li {
  margin-top: .2rem;
}

.sim-rules p + p {
  margin-top: .35rem;
}

.sim-controls {
  display: grid;
  min-width: 0;
}

.sim-controls--choice {
  margin: 0;
  padding: 0;
  border: 0;
}

.sim-controls--choice legend {
  padding: 0;
}

.sim-actions,
.sim-chips,
.sim-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.sim-actions .btn {
  flex: 1 1 6rem;
}

.sim-cases {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: .3rem;
}

.sim-case {
  display: grid;
  justify-items: center;
  gap: 5px;
  padding: .5rem 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg);
  cursor: pointer;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.sim-case:hover {
  border-color: var(--muted);
}

.sim-case:focus {
  outline: none;
}

.sim-case:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.sim-case__top {
  display: flex;
  gap: 1px;
}

.sim-case__cell {
  width: 7px;
  height: 7px;
  border: 1px solid var(--line-strong);
  border-radius: 1px;
}

.sim-case__cell--on {
  border-color: var(--accent);
  background: var(--accent);
}

.sim-case__out {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  transition: background-color .25s var(--ease), border-color .25s var(--ease);
}

.sim-case[aria-pressed='true'] {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.sim-case[aria-pressed='true'] .sim-case__out {
  border-color: var(--accent);
  background: var(--accent);
}

.slider {
  width: 100%;
  height: 28px;
  margin: 0;
  background: transparent;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.slider::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: var(--line-strong);
}

.slider::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: var(--line-strong);
}

.slider::-webkit-slider-thumb {
  width: 18px;
  height: 18px;
  margin-top: -7px;
  border: 3px solid var(--surface);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
  -webkit-appearance: none;
  appearance: none;
}

.slider::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border: 3px solid var(--surface);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.slider:focus {
  outline: none;
}

.slider:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 1px var(--accent), 0 0 0 5px var(--accent-soft);
}

.slider:focus-visible::-moz-range-thumb {
  box-shadow: 0 0 0 1px var(--accent), 0 0 0 5px var(--accent-soft);
}

.sim-result {
  min-width: 0;
}

.sim-board {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg);
}

.sim-board canvas {
  display: block;
  width: 100%;
  height: auto;
  cursor: crosshair;
  touch-action: none;
}

.sim-board__hint {
  margin-top: .75rem;
}
.sim-stats {
  margin-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.sim-stats > div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .6rem 0;
  border-bottom: 1px solid var(--line);
}

.sim-stats dt {
  font-size: .925rem;
  color: var(--ink-2);
}

.sim-stats dd {
  font-family: var(--font-mono);
  font-size: .95rem;
  font-weight: 500;
  text-align: right;
}

.sim-status {
  position: absolute;
  right: .75rem;
  bottom: .75rem;
  left: .75rem;
  pointer-events: none;
  padding: .9rem 1.1rem;
  border: 1px solid var(--accent);
  border-left-width: 2px;
  border-radius: var(--radius);
  background: var(--accent-soft);
  font-size: .9rem;
  color: var(--ink-2);
}