/* Header */
.header-link,
.header-action {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
}

.header-action[aria-expanded="true"] {
  color: var(--color-text-muted);
}

.header-link:hover,
.header-action:hover {
  background: var(--color-text);
  color: var(--color-canvas);
}

.about-panel {
  width: 100%;
  max-height: min(240px, 35vh);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 5vw, 80px);
  padding: 22px 28px 26px;
  overflow-y: auto;
  border-top: 1px solid var(--color-border);
  background: var(--color-canvas);
  color: var(--color-text-muted);
  font-size: clamp(15px, 1.3vw, 18px);
  line-height: 1.5;
}

.about-panel p {
  max-width: none;
  margin-bottom: 0;
}

@media (max-width: 700px) {
  .about-panel {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 18px;
  }
}

/* Sidebar */
.sidebar-section + .sidebar-section {
  margin-top: 30px;
}

.sidebar-heading-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.sidebar-heading-row .sidebar-heading {
  margin-bottom: 0;
}

.sidebar-heading {
  margin-bottom: 10px;
  font-size: 25px;
  line-height: 1.05;
}

.sidebar-add-button {
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  background: transparent;
  font-size: 30px;
  font-weight: 300;
  line-height: 1;
  transform: translateY(2px);
  cursor: pointer;
}

.sidebar-add-button:hover {
  background: var(--color-text);
  color: var(--color-canvas);
}

#gene-select {
  display: none;
}

.organism-picker-trigger,
.organism-category-button,
.organism-option-button {
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-text);
  text-align: left;
  cursor: pointer;
}

.organism-picker-trigger {
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 2px 7px 0;
  font-size: 24px;
  line-height: 1.2;
}

.organism-picker-trigger[aria-expanded="true"] {
  color: var(--color-text-muted);
}

.organism-picker-trigger:hover {
  background: var(--color-text);
  color: var(--color-canvas);
}

.organism-picker-chevron,
.organism-category-chevron {
  flex: 0 0 auto;
  font-weight: 300;
  line-height: 1;
  transition: transform 140ms ease;
}

.organism-picker-chevron {
  font-size: 34px;
}

.organism-picker-trigger[aria-expanded="true"] .organism-picker-chevron,
.organism-category-button[aria-expanded="true"] .organism-category-chevron {
  transform: rotate(90deg);
}

.organism-picker-menu {
  padding: 5px 0 9px;
}

.organism-category + .organism-category {
  margin-top: 2px;
}

.organism-category-button {
  min-height: 31px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 4px 2px 4px 28px;
  font-size: 19px;
  line-height: 1.2;
}

.organism-category-button.current-category {
  font-weight: 700;
}

.organism-category-button:hover,
.organism-option-button:hover {
  background: var(--color-text);
  color: var(--color-canvas);
}

.organism-category-chevron {
  font-size: 22px;
}

.organism-category-options {
  padding: 1px 0 3px;
}

.organism-option-button {
  min-height: 30px;
  padding: 4px 8px 4px 58px;
  font-size: 18px;
  line-height: 1.2;
}

.organism-option-button[aria-current="true"] {
  font-weight: 700;
}

.genome-count {
  margin-top: -3px;
  margin-bottom: 12px;
  color: var(--color-text-muted);
  font-size: 15px;
}

#rules-section .board {
  display: grid;
  grid-template-columns: repeat(6, 43px);
  align-items: center;
  gap: 6px;
  margin: -4px;
  padding: 4px;
  overflow: visible;
}

#rules-section .gene-tile {
  width: 43px;
  height: 29px;
}

.gene-tile {
  width: 36px;
  height: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  position: relative;
  flex: 0 0 auto;
  border: 1px solid transparent;
  border-radius: 0;
  box-shadow: var(--tile-shadow);
  cursor: pointer;
}

.gene-tile:not(.add-tile) {
  cursor: grab;
  touch-action: none;
}

.gene-tile.dragging {
  z-index: 1;
  cursor: grabbing;
  opacity: 0.82;
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

.gene-tile:hover {
  outline: 1px solid var(--color-text);
  outline-offset: 2px;
}

.gene-tile.active {
  border-color: var(--color-active-gene);
  box-shadow: 0 0 0 1px var(--color-active-gene), 0 0 12px rgba(105, 214, 139, 0.45);
}

.gene-tile.disabled {
  border-color: var(--color-border-strong);
  border-style: dashed;
  filter: grayscale(1);
  opacity: 0.45;
}

.gene-tile.disabled span {
  filter: grayscale(1);
}

.gene-tile.add-tile {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--color-text);
  background: transparent;
  box-shadow: none;
  color: var(--color-text);
  font-size: 24px;
  font-weight: 300;
}

.rule-list-actions {
  margin-top: 8px;
}

.initially-hidden {
  display: none;
}

.text-button {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
}

.genome-file-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 28px;
}

.icon-button {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--radius-small);
  background: transparent;
  color: var(--color-text);
  font-size: 29px;
  font-weight: 300;
  line-height: 1;
  cursor: pointer;
}

.icon-button:hover {
  border-color: var(--color-border-strong);
  background: var(--color-surface-raised);
}

.genome-file-actions .icon-button:hover {
  border-color: var(--color-text);
  border-radius: 0;
  background: var(--color-text);
  color: var(--color-canvas);
}

.genome-file-actions .icon-button:hover .button-icon {
  filter: invert(1);
}

.button-icon {
  display: block;
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
  pointer-events: none;
}

.pause-state-icon {
  display: none;
}

.genome-file-actions .icon-button {
  width: 40px;
  height: 40px;
}

.genome-file-actions .button-icon {
  width: 28px;
  height: 28px;
}

.upload-button {
  position: relative;
}

.visually-hidden-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.share-button {
  margin-left: 2px;
  font-size: 26px;
}

.gene-inspector {
  display: none;
}

/* Advanced */
.advanced-shell {
  margin-top: 34px;
}

.advanced-shell > summary {
  width: 100%;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-right: 2px;
  list-style: none;
  font-size: 25px;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
}

.advanced-shell > summary:hover {
  background: var(--color-text);
  color: var(--color-canvas);
}

.advanced-shell > summary::-webkit-details-marker {
  display: none;
}

.advanced-shell > summary span {
  display: inline-block;
  font-size: 32px;
  font-weight: 300;
  transition: transform 150ms ease;
}

.advanced-shell[open] > summary span {
  transform: rotate(90deg);
}

.advanced-content {
  display: grid;
  gap: 2px;
  padding-top: 18px;
}

details.block {
  display: block;
}

details.block > summary {
  min-height: 31px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin: 0;
  padding: 4px 2px 4px 28px;
  color: var(--color-text);
  font-size: 19px;
  line-height: 1.2;
  list-style: none;
  cursor: pointer;
}

details.block > summary:hover {
  background: var(--color-text);
  color: var(--color-canvas);
}

details.block > summary::-webkit-details-marker {
  display: none;
}

details.block > summary::after {
  content: "›";
  flex: 0 0 auto;
  font-size: 22px;
  font-weight: 300;
  line-height: 1;
  transition: transform 140ms ease;
}

details.block[open] > summary::after {
  transform: rotate(90deg);
}

.advanced-subgroup-content {
  display: grid;
  gap: 10px;
  padding: 8px 2px 14px 28px;
}

.advanced-subgroup-content label {
  color: var(--color-text-muted);
  font-size: 13px;
}

.appearance-palette {
  display: grid;
  gap: 10px;
  padding-top: 4px;
}

.advanced-subheading {
  margin: 0;
  color: var(--color-text);
  font-size: 14px;
}

#sound-toggle-button {
  margin-top: 12px;
}

.form-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
}

.form-row-inline {
  display: flex;
  flex-wrap: wrap;
}

.control-buttons {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 6px;
  padding-top: 8px;
}

.control-buttons button {
  grid-column: 1 / -1;
}

input[type="number"],
select {
  min-width: 0;
  padding: 6px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-surface);
  color: var(--color-text);
}

input[type="number"] {
  width: 84px;
}

input[type="range"] {
  min-width: 92px;
  accent-color: var(--color-text);
}

input[type="checkbox"] {
  accent-color: var(--color-text);
}

small {
  color: var(--color-text-muted);
}

.secondary-button,
.primary-button,
.control-buttons button {
  min-height: 34px;
  padding: 7px 10px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-small);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
}

.secondary-button:hover,
.control-buttons button:hover {
  background: var(--color-surface-raised);
}

.primary-button {
  border-color: var(--color-text);
  background: var(--color-text);
  color: var(--color-canvas);
}

/* Simulation toolbar */
.toolbar-button,
.segmented-button,
.segment {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
}

.toolbar-button {
  width: 38px;
  height: 38px;
  padding: 0;
  font-size: 25px;
}

.play-button {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: transparent;
  font-size: 0;
}

.play-button .button-icon {
  width: 50px;
  height: 50px;
}

.transport-controls .toolbar-button:not(.play-button) {
  width: 46px;
  height: 46px;
}

.transport-controls .toolbar-button:not(.play-button) .button-icon {
  width: 32px;
  height: 32px;
}

.play-button[data-state="running"] .play-state-icon {
  display: none;
}

.play-button[data-state="running"] .pause-state-icon {
  display: block;
}

.step-button {
  font-size: 0;
}

.toolbar-label {
  font-size: 22px;
}

.segmented-button {
  min-width: 44px;
  height: 38px;
  padding: 0 9px;
  border: 1px solid var(--color-text);
  border-radius: var(--radius-medium);
  font-size: 18px;
}

.segmented-button.active {
  background: var(--color-text);
  color: var(--color-canvas);
}

#slowdown-button,
#slowdown-button.active {
  background: var(--color-canvas);
  color: var(--color-text);
}

.segmented-control {
  overflow: hidden;
  border: 1px solid var(--color-text);
  border-radius: var(--radius-medium);
}

.segment {
  min-width: 66px;
  height: 38px;
  padding: 0 14px;
  font-size: 20px;
}

.view-control .segment {
  min-width: 48px;
}

.view-control {
  grid-column: 4;
}

.segment + .segment {
  border-left: 1px solid var(--color-text);
}

.segment.active {
  background: var(--color-text);
  color: var(--color-canvas);
}

.graph-tools-control {
  width: max-content;
  justify-self: start;
}

.graph-tools-control .segment {
  width: 78px;
  min-width: 78px;
  padding-inline: 0;
}

.graph-tools-control.is-3d {
  border-color: var(--color-border-strong);
}

.graph-tools-control.is-3d #tool-move-button:disabled {
  background: transparent;
  color: var(--color-text);
  cursor: default;
  opacity: 1;
}

/* Modal (Genome Editor) */
body.modal-open {
  overflow: hidden;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding:
    calc(12px + env(safe-area-inset-top, 0px))
    calc(12px + env(safe-area-inset-right, 0px))
    calc(12px + env(safe-area-inset-bottom, 0px))
    calc(12px + env(safe-area-inset-left, 0px));
}

@supports (height: 100dvh) {
  .modal {
    width: 100dvw;
    height: 100dvh;
  }
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
}

.modal-dialog {
  position: relative;
  width: min(760px, 100%);
  min-height: min(560px, calc(100dvh - 24px));
  max-height: 100%;
  display: flex;
  flex-direction: column;
  overflow: auto;
  padding: 30px 32px 28px;
  border: 2px solid #aaa;
  border-radius: 22px;
  background: var(--color-canvas);
  color: var(--color-text);
  box-shadow: none;
}

.modal-header,
.modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.modal-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "heading close"
    "toggle close";
  align-items: flex-start;
  column-gap: 12px;
  row-gap: 11px;
}

.modal-header > div:first-child {
  grid-area: heading;
}

.modal-header-actions {
  display: contents;
}

.modal-header .rule-editor-enabled-toggle {
  grid-area: toggle;
  justify-self: start;
}

.modal-header .modal-close-button {
  grid-area: close;
  align-self: start;
}

.modal-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
}

.modal-subtitle {
  margin-top: 7px;
  color: var(--color-text-muted);
  font-family: var(--font-technical);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.modal-subtitle:empty {
  display: none;
}

.modal-close-button {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-text);
  font-size: 40px;
  font-weight: 200;
  line-height: 1;
  cursor: pointer;
}

.modal-close-button:hover {
  color: var(--color-text-muted);
}

.rule-editor-enabled-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 14px;
  cursor: pointer;
}

.rule-editor-enabled-toggle input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.rule-editor-switch {
  width: 34px;
  height: 18px;
  position: relative;
  flex: 0 0 auto;
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  transition: background-color 140ms ease, border-color 140ms ease;
}

.rule-editor-switch::after {
  content: "";
  width: 12px;
  height: 12px;
  position: absolute;
  top: 2px;
  left: 2px;
  border-radius: 50%;
  background: var(--color-text-muted);
  transition: transform 140ms ease, background-color 140ms ease;
}

.rule-editor-enabled-toggle input:checked + .rule-editor-switch {
  border-color: var(--color-text);
  background: var(--color-text);
}

.rule-editor-enabled-toggle input:checked + .rule-editor-switch::after {
  transform: translateX(16px);
  background: var(--color-canvas);
}

.rule-editor-enabled-toggle input:focus-visible + .rule-editor-switch {
  outline: 2px solid var(--color-text);
  outline-offset: 3px;
}

.modal-body {
  display: grid;
  gap: 48px;
  padding: 50px 2px 42px;
}

.rule-editor-section h4 {
  margin: 0 0 24px;
  font-size: 24px;
  line-height: 1.1;
}

.rule-editor-section {
  min-width: 0;
}

.rule-editor-line {
  min-width: 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 18px;
  line-height: 1.4;
}

.rule-editor-line + .rule-editor-line {
  margin-top: 17px;
}

.rule-editor-state-line {
  display: grid;
  grid-template-columns: max-content minmax(72px, 1fr) max-content minmax(72px, 1fr);
  gap: 10px;
}

.rule-editor-state-line .rule-editor-bracket-control {
  justify-self: start;
}

.rule-editor-bracket-control {
  min-width: 0;
  min-height: 31px;
  display: inline-flex;
  align-items: center;
  position: relative;
  color: var(--color-text);
  font-family: var(--font-technical);
  white-space: nowrap;
}

.rule-editor-bracket-control::before {
  content: "[";
}

.rule-editor-bracket-control::after {
  content: "]";
}

.rule-editor-bracket-control:hover {
  border-radius: 2px;
  background: var(--color-text);
  color: var(--color-canvas);
}

.modal-dialog .rule-editor-bracket-control select,
.modal-dialog .rule-editor-bracket-control input[type="number"] {
  min-width: 0;
  min-height: 31px;
  padding: 2px 7px;
  border: 0;
  border-radius: 0;
  outline: 0;
  appearance: none;
  background: transparent;
  color: inherit;
  font-family: var(--font-technical);
  font-size: inherit;
  line-height: 1;
}

.modal-dialog .rule-editor-bracket-control select {
  field-sizing: content;
  cursor: pointer;
}

.modal-dialog .rule-editor-bracket-control select option {
  background: var(--color-canvas);
  color: var(--color-text);
}

.modal-dialog .rule-editor-bracket-control select:disabled {
  cursor: default;
  opacity: 0.4;
}

.rule-editor-range-control {
  gap: 2px;
}

.modal-dialog .rule-editor-range-control .rule-int-tiny {
  width: 66px;
  padding-inline: 3px;
  text-align: center;
}

.modal-dialog .rule-editor-range-control input::placeholder {
  color: var(--color-text-muted);
  opacity: 1;
}

.rule-editor-range-divider {
  color: var(--color-text-muted);
}

.rule-editor-bracket-control:hover .rule-editor-range-divider,
.rule-editor-bracket-control:hover input::placeholder {
  color: var(--color-canvas);
}

.rule-editor-operation-line {
  gap: 14px;
}

.rule-editor-operation-control {
  max-width: 260px;
}

#rule-editor-op-kind {
  width: auto;
  max-width: 230px;
}

.modal-footer {
  flex-wrap: wrap;
  margin-top: auto;
}

.modal-footer-left,
.modal-footer-right {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.modal-footer-right {
  margin-left: auto;
}

.rule-editor-insert-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-right: 4px;
  font-size: 20px;
  font-weight: 700;
}

.modal-dialog .secondary-button,
.modal-dialog .primary-button {
  min-height: 42px;
  padding: 7px 13px;
  border: 1px solid transparent;
  border-radius: var(--radius-small);
  background: transparent;
  color: var(--color-text);
  font-size: 18px;
}

.modal-dialog .secondary-button:hover {
  background: var(--color-surface-raised);
}

#rule-editor-remove {
  color: var(--color-danger);
}

#rule-editor-save {
  border-color: var(--color-text);
  background: transparent;
  color: var(--color-text);
  font-size: 20px;
  font-weight: 700;
}

#rule-editor-save:hover {
  background: var(--color-text);
  color: var(--color-canvas);
}

.rule-int-tiny {
  width: 70px;
  appearance: textfield;
}

.rule-int-tiny::-webkit-outer-spin-button,
.rule-int-tiny::-webkit-inner-spin-button {
  margin: 0;
  -webkit-appearance: none;
}

.rule-index-input {
  width: 46px;
  text-align: center;
}

#rule-editor-error {
  margin-top: -28px;
  padding: 10px 12px;
  border: 1px solid var(--color-danger);
  border-radius: var(--radius-small);
  color: var(--color-danger);
  font-size: 14px;
}

@media (max-width: 700px) {
  .modal {
    align-items: flex-start;
    padding: 8px;
  }

  .modal-dialog {
    min-height: calc(100dvh - 16px);
    padding: 22px 20px 20px;
    border-radius: 16px;
  }

  .modal-header-actions {
    gap: 12px;
  }

  .rule-editor-enabled-toggle > span:last-child {
    display: none;
  }

  .modal-title {
    font-size: 27px;
  }

  .modal-body {
    gap: 38px;
    padding: 38px 0 36px;
  }

  .rule-editor-state-line {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .rule-editor-line {
    font-size: 16px;
  }

  .rule-editor-operation-line {
    align-items: flex-start;
  }

  .rule-editor-operation-control {
    max-width: 100%;
  }

  .modal-footer {
    align-items: flex-end;
    gap: 18px;
  }

  .modal-footer-left,
  .modal-footer-right {
    width: 100%;
  }

  .modal-footer-right {
    justify-content: flex-end;
  }

  .rule-editor-insert-control {
    margin-right: auto;
    font-size: 18px;
  }
}

/* Toast */
#toast {
  position: fixed;
  left: 50%;
  bottom: 18px;
  z-index: 1100;
  transform: translateX(-50%);
  padding: 10px 14px;
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  background: var(--color-surface-raised);
  color: var(--color-text);
  font-size: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.55);
}

/* Visualization primitives */
.link {
  vector-effect: non-scaling-stroke;
  stroke-width: 2;
  stroke-linecap: round;
}

.face-fill {
  pointer-events: none;
  stroke: none;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.palette-chip {
  height: 32px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  box-shadow: var(--tile-shadow);
}

#mobile-toolbar button,
#mobile-toolbar select {
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-small);
  background: var(--color-canvas);
  color: var(--color-text);
}

#mobile-toolbar select {
  flex: 1 1 220px;
}

#mobile-toolbar button.toggle-active {
  background: var(--color-text);
  color: var(--color-canvas);
}

#mobile-toolbar .mobile-icon-button {
  width: 38px;
  padding: 6px;
}

#mobile-toolbar .mobile-icon-button:not(.mobile-play-button) {
  width: 42px;
  padding: 6px;
}

#mobile-toolbar .mobile-icon-button:not(.mobile-play-button) .button-icon {
  width: 28px;
  height: 28px;
}

#mobile-toolbar #mobile-reset {
  width: 46px;
}

#mobile-toolbar #mobile-reset .button-icon {
  width: 32px;
  height: 32px;
}

#mobile-toolbar .mobile-play-button[data-state="running"] .play-state-icon {
  display: none;
}

#mobile-toolbar .mobile-play-button[data-state="running"] .pause-state-icon {
  display: block;
}

#rules-overlay .gene-tile {
  width: 38px;
  height: 25px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}