/* The fractal fills the screen. Around it float a few soft cards and round buttons, so the picture stays the
   thing you look at. Colours are ink, paper and one blue; type is Jost, a Futura revival,
   with Source Serif italic for the formulas. No outlines, no glow: surfaces are told apart by tone. */
:root {
  --ink: #0b0b0c;
  --surface: rgba(24, 24, 27, 0.9);
  --surface-2: rgba(255, 255, 255, 0.07);
  --surface-3: rgba(255, 255, 255, 0.13);
  --paper: #f7f1e9;
  --paper-2: rgba(247, 241, 233, 0.68);
  --paper-3: rgba(247, 241, 233, 0.42);
  --blue: #5ab4dc;
  --blue-deep: #3e7c8f;
  --red: #d06070;
  --sans: 'Jost', 'Futura', system-ui, sans-serif;
  --serif: 'Source Serif 4', Georgia, serif;
  --gap: 20px;
  --r: 18px;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}
svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* sliders: a thin rounded track and a round paper knob */
input[type='range'] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 22px;
  margin: 0;
  background: transparent;
  cursor: pointer;
}
input[type='range']::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: var(--surface-3);
}
input[type='range']::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: var(--surface-3);
}
input[type='range']::-moz-range-progress {
  height: 4px;
  border-radius: 2px;
  background: var(--blue);
}
input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  margin-top: -7px;
  border-radius: 50%;
  background: var(--paper);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}
input[type='range']::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border: 0;
  border-radius: 50%;
  background: var(--paper);
}

/* ---------- the picture ---------- */

#stage {
  position: fixed;
  inset: 0;
  touch-action: none;
  cursor: crosshair;
}
#stage.panning {
  cursor: grab;
}
#stage.picking {
  cursor: cell;
}
#stage canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
#overlay {
  pointer-events: none;
}
#stage {
  transition: filter 0.3s;
}
body.sheet-open #stage {
  filter: brightness(0.55);
}

/* ---------- shared pieces ---------- */

.card {
  position: fixed;
  z-index: 3;
  background: var(--surface);
  border-radius: var(--r);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}
.round {
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--paper);
  transition: background 0.15s;
}
.round.sm {
  width: 32px;
  height: 32px;
  background: var(--surface-2);
}
.round.sm svg {
  width: 15px;
  height: 15px;
  stroke-width: 2;
}
.round.md {
  width: 48px;
  height: 48px;
  background: var(--surface);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
}
.round.md svg {
  width: 21px;
  height: 21px;
}
.round:hover {
  background: var(--surface-3);
}
.round.md:hover {
  background: #26262a;
}
.round.on {
  color: var(--blue);
}

/* ---------- which fractal ---------- */

.info {
  top: var(--gap);
  left: var(--gap);
  width: 330px;
  padding: 16px 18px 18px;
}
.title {
  display: flex;
  align-items: center;
  gap: 8px;
}
.name {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-weight: 600;
  font-size: 23px;
  line-height: 1.1;
  white-space: nowrap;
}
/* names and formulas stay on one line; main.js shrinks the long ones to fit */
.fit {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
  /* room for tall letters and the tails of g and p, without moving anything */
  padding-block: 0.2em;
  margin-block: -0.2em;
}
.name svg {
  flex: none;
  width: 14px;
  height: 14px;
  stroke-width: 2.2;
  color: var(--paper-3);
  transition: transform 0.2s, color 0.2s;
}
.name:hover svg {
  color: var(--paper);
  transform: translateY(2px);
}
/* a new fractal's name and formula fade in while the picture morphs. Only the text moves, never the row that
   holds the arrows, so the arrows keep their place */
.info.fresh .name,
.info.fresh .formula,
.info.fresh .note,
.info.fresh .param {
  animation: fresh 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) backwards;
}
.info.fresh .formula {
  animation-delay: 0.06s;
}
.info.fresh .note,
.info.fresh .param {
  animation-delay: 0.12s;
}
@keyframes fresh {
  from {
    opacity: 0;
    transform: translateY(5px);
  }
}
.formula {
  margin: 10px 0 0;
  text-align: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 18px;
}
.note {
  margin: 6px 0 0;
  text-align: center;
  font-size: 15px;
  line-height: 1.45;
  color: var(--paper-2);
}
.param {
  margin-top: 14px;
}
.param[hidden] {
  display: none;
}
.param label {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: var(--paper-2);
}
.param output {
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

/* ---------- readout ---------- */

.readout {
  left: var(--gap);
  bottom: var(--gap);
  min-width: 260px;
  max-width: 420px;
  padding: 14px 20px 14px 14px;
  transition: opacity 0.2s, transform 0.2s;
}
.readout[hidden] {
  display: flex;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
}
.readout p {
  margin: 0;
}
.readout .big {
  font-weight: 600;
  font-size: 28px;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
}
#r-note,
.readout .big,
.readout .small {
  white-space: nowrap;
}
.readout.escaped #r-note {
  color: var(--red);
}
#r-note {
  margin-top: 4px;
  font-size: 16px;
  color: var(--blue);
}
.readout .small {
  margin-top: 6px;
  font-size: 13px;
  color: var(--paper-3);
  font-variant-numeric: tabular-nums;
}
.readout {
  display: flex;
  align-items: center;
  gap: 16px;
}
.r-text {
  min-width: 0;
}
/* the actions: a column of round icon buttons on the left of the card */
.r-actions {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.r-actions button {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: var(--paper-2);
  transition: transform 0.18s cubic-bezier(0.2, 0.8, 0.2, 1), color 0.15s;
}
.r-actions button svg {
  width: 19px;
  height: 19px;
}
/* no plate: the icon just lifts toward the pointer */
.r-actions button:hover {
  color: var(--paper);
  transform: translateX(3px) scale(1.12);
}
.r-actions button:active {
  transform: scale(0.94);
}
.r-actions button[data-act='stop']:hover {
  color: var(--red);
}

/* ---------- the dock: gallery, random ---------- */

.dock {
  position: fixed;
  z-index: 4;
  left: 50%;
  bottom: var(--gap);
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 16px;
}
.random {
  position: relative;
  width: 76px;
  height: 76px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  transition: transform 0.15s;
}
.random:hover {
  transform: scale(1.04);
}
.random:active {
  transform: scale(0.97);
}
.random .ring {
  position: absolute;
  inset: 5px;
  width: calc(100% - 10px);
  height: calc(100% - 10px);
  stroke: var(--ink);
  stroke-width: 1.8;
  stroke-dasharray: 6 5;
  opacity: 0.55;
}
.random .glyph {
  width: 28px;
  height: 28px;
  stroke: var(--ink);
  stroke-width: 1.4;
}
.random .glyph circle {
  fill: var(--blue-deep);
  stroke: none;
}
.random:hover .ring {
  animation: turn 8s linear infinite;
}
.random.spinning .ring {
  opacity: 0.9;
  animation: turn 1.7s cubic-bezier(0.45, 0, 0.55, 1);
}
@keyframes turn {
  to {
    transform: rotate(360deg);
  }
}

/* ---------- bottom right: settings over zoom ---------- */

.tools {
  position: fixed;
  z-index: 4;
  right: var(--gap);
  bottom: var(--gap);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}
.tool-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.zoom {
  display: flex;
  flex-direction: column;
  border-radius: 24px;
  background: var(--surface);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
  overflow: hidden;
}
.zoom button {
  width: 48px;
  height: 46px;
  display: grid;
  place-items: center;
  transition: background 0.15s;
}
.zoom button:hover {
  background: var(--surface-3);
}
.zoom svg {
  width: 19px;
  height: 19px;
}

/* popovers grow up out of their button, and are never taller than the room above it */
.pop {
  position: absolute;
  bottom: calc(100% + 12px);
  transform: translateY(10px) scale(0.96);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1), visibility 0.25s;
  overflow-y: auto;
  scrollbar-width: none;
}
.pop.open {
  transform: none;
  opacity: 1;
  visibility: visible;
}
/* a popover covers what is under it completely */
.pop {
  background: #19191c;
  z-index: 6;
}
.settings {
  right: 0;
  width: 290px;
  padding: 16px 18px 12px;
  transform-origin: 100% 100%;
  max-height: calc(100vh - 260px);
}

/* ---------- top right: about, opening downward ---------- */

.corner {
  position: fixed;
  z-index: 5;
  right: var(--gap);
  top: var(--gap);
}
.about {
  right: 0;
  top: calc(100% + 12px);
  bottom: auto;
  width: 380px;
  padding: 22px 24px 18px;
  transform: translateY(-10px) scale(0.96);
  transform-origin: 100% 0;
  max-height: calc(100vh - 110px);
}
.about h2 {
  margin: 0;
  font-weight: 600;
  font-size: 22px;
  white-space: nowrap;
}
.about .lede {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--paper-2);
}
.about em {
  font-family: var(--serif);
  color: var(--paper);
}
.how {
  list-style: none;
  counter-reset: how;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.how li {
  counter-increment: how;
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 10px;
  font-size: 15px;
  line-height: 1.45;
  color: var(--paper-2);
}
.how li::before {
  content: counter(how);
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--surface-3);
  color: var(--paper);
  font-size: 13px;
}
.how b {
  font-weight: 500;
  color: var(--paper);
}
.about .tip {
  margin: 14px 0 0;
  font-size: 14px;
  color: var(--paper-3);
}
.about .origin {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--paper-3);
}
.about .origin b {
  font-weight: 500;
  color: var(--paper-2);
}
.about .open {
  margin: 12px 0 0;
  font-size: 14px;
  color: var(--paper-2);
}
.about .open a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  vertical-align: middle;
  color: var(--blue);
  text-decoration: none;
  white-space: nowrap;
}
/* the GitHub mark is a filled shape, unlike the line icons elsewhere */
.about .open .gh {
  width: 15px;
  height: 15px;
  fill: currentColor;
  stroke: none;
}
.about .open a:hover {
  text-decoration: underline;
}
.about .keys {
  display: grid;
  grid-template-columns: repeat(3, auto);
  justify-content: start;
  gap: 8px 18px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--surface-2);
  font-size: 13.5px;
  color: var(--paper-2);
}
.about .keys.desk-only {
  display: grid;
}
.about .keys span {
  display: flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
}
.about kbd {
  min-width: 22px;
  height: 22px;
  display: inline-grid;
  place-items: center;
  border-radius: 6px;
  background: var(--surface-3);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 12px;
}
.about a {
  color: var(--paper-2);
}
.about-btn.on,
.settings-btn.on {
  color: var(--blue);
}
.set-group + .set-group {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--surface-2);
}
.set-label {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--paper-2);
}
.swatches {
  display: flex;
  gap: 6px;
}
.swatches button {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 8px 0 6px;
  border-radius: 12px;
  font-size: 13px;
  color: var(--paper-2);
  transition: background 0.15s;
}
.swatches button:hover {
  background: var(--surface-2);
}
.swatches button.on {
  background: var(--surface-3);
  color: var(--paper);
}
.sw {
  width: 34px;
  height: 22px;
  border-radius: 7px;
}
.sw-plain {
  background: radial-gradient(circle at 60% 50%, #222225 34%, #f7f1e9 36%, #0b0b0c 40%);
}
.sw-tones {
  background: radial-gradient(circle at 60% 50%, #8d8783 30%, #3e7c8f 55%, #0b0b0c 70%);
}
.sw-vivid {
  background: radial-gradient(circle at 60% 50%, #f3e36b 25%, #3542b8 50%, #e04848 75%);
}
.toggle {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 7px 0;
  font-size: 15px;
  text-align: left;
}
.switch {
  width: 36px;
  height: 21px;
  border-radius: 999px;
  background: var(--surface-3);
  position: relative;
  transition: background 0.2s;
}
.switch::after {
  content: '';
  position: absolute;
  top: 2.5px;
  left: 2.5px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--paper);
  transition: transform 0.2s;
}
.toggle.on .switch {
  background: var(--blue-deep);
}
.toggle.on .switch::after {
  transform: translateX(15px);
}
.toggle.disabled {
  opacity: 0.4;
}
.slider {
  display: block;
  padding: 4px 0;
  font-size: 15px;
}
.slider span {
  display: flex;
  justify-content: space-between;
}
.slider output {
  font-size: 13px;
  color: var(--paper-3);
  font-variant-numeric: tabular-nums;
}
.set-links {
  display: flex;
  justify-content: space-between;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--surface-2);
}
.set-links button {
  font-size: 14px;
  color: var(--paper-2);
}
.set-links button:hover {
  color: var(--paper);
}

/* ---------- messages ---------- */

.hint,
.limit {
  position: fixed;
  z-index: 2;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  pointer-events: none;
  text-shadow: 0 0 10px var(--ink), 0 0 3px var(--ink);
  white-space: nowrap;
}
.hint {
  bottom: 130px;
  font-size: 18px;
  color: var(--paper-2);
  transition: opacity 0.6s;
}
.hint.gone {
  opacity: 0;
}
.limit {
  top: 24px;
  font-size: 14px;
  color: var(--red);
}
.toast {
  position: fixed;
  z-index: 20;
  top: 20px;
  left: 50%;
  transform: translate(-50%, -8px);
  margin: 0;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.35;
  text-align: center;
  max-width: min(460px, calc(100% - 32px));
  opacity: 0;
  pointer-events: none;
  cursor: pointer;
  transition: opacity 0.25s, transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.toast.show {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, 0);
}

/* ---------- overlays ---------- */

.gallery,
.help,
.welcome {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(5, 5, 6, 0.72);
}
.help[hidden],
.welcome[hidden] {
  display: none;
}
.gallery {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.22s ease, visibility 0.3s;
}
.gallery.open {
  opacity: 1;
  visibility: visible;
}
.gallery-sheet {
  transform: translateY(18px) scale(0.98);
  /* closing only fades: the sheet holds still and resets after it has gone, so nothing slides under the pointer */
  transition: transform 0s 0.3s;
}
.gallery.open .gallery-sheet {
  transform: none;
  transition: transform 0.32s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.gallery-sheet {
  width: min(1080px, 100%);
  max-height: 80vh;
  overflow: auto;
  background: #161618;
  border-radius: 24px;
  padding: 24px 28px 32px;
}
.gallery-sheet header {
  display: flex;
  align-items: center;
  gap: 14px;
}
.gallery-sheet h2 {
  margin: 0;
  font-weight: 600;
  font-size: 26px;
}
#g-search {
  margin-left: auto;
  width: 220px;
  height: 36px;
  padding: 0 14px;
  border: 0;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--paper);
  font: inherit;
  font-size: 15px;
  outline: none;
}
#g-search:focus {
  background: var(--surface-3);
}
.fam {
  margin-top: 24px;
}
.fam[hidden] {
  display: none;
}
.fam h3 {
  margin: 0 0 12px;
  font-weight: 500;
  font-size: 15px;
  color: var(--paper-2);
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  grid-auto-rows: auto;
  gap: 16px;
}
.card-f {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 0 4px;
  text-align: left;
  border-radius: 14px;
}
.card-f[hidden] {
  display: none;
}
.thumb {
  display: block;
  aspect-ratio: 3 / 2;
  margin-bottom: 8px;
  border-radius: 14px;
  background: var(--ink);
  overflow: hidden;
  transition: box-shadow 0.2s;
}
.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.thumb img:not([src]) {
  visibility: hidden;
}
/* hovering only outlines the card; nothing moves, so the grid stays still under the pointer */
.card-f:hover .thumb {
  box-shadow: 0 0 0 2px var(--surface-3);
}
.card-f.on .thumb {
  box-shadow: 0 0 0 2px var(--blue);
}
.cname {
  font-weight: 500;
  font-size: 16px;
}
.cname,
.cformula {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cformula {
  font-family: var(--serif);
  font-style: italic;
  font-size: 14px;
  color: var(--paper-2);
}

.sheet {
  position: relative;
  max-width: 560px;
  max-height: 100%;
  overflow: auto;
  background: #161618;
  border-radius: 24px;
  padding: 34px 36px;
}
.sheet h2 {
  margin: 0;
  font-weight: 600;
  font-size: 30px;
  line-height: 1.1;
}
.sheet p {
  font-size: 16px;
  line-height: 1.55;
  color: var(--paper-2);
}
.sheet em {
  font-family: var(--serif);
  color: var(--paper);
}
.sheet h3 {
  margin: 22px 0 8px;
  font-weight: 500;
  font-size: 15px;
  color: var(--paper-2);
}
.sheet dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 6px 20px;
  margin: 0;
  font-size: 15px;
}
.sheet dd {
  margin: 0;
  color: var(--paper-2);
}
.sheet .source {
  margin-top: 20px;
  font-size: 14px;
  color: var(--paper-3);
}
.sheet a {
  color: var(--paper);
}
.sheet .close {
  position: absolute;
  top: 16px;
  right: 16px;
}
.welcome .sheet {
  text-align: center;
}
.start {
  margin-top: 6px;
  padding: 13px 24px;
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  font-weight: 500;
  font-size: 16px;
}
.start:hover {
  background: #fff;
}

.phone-only {
  display: none !important;
}

/* ---------- phones ---------- */

@media (max-width: 760px) {
  :root {
    --gap: 12px;
  }
  .desk-only {
    display: none !important;
  }
  .phone-only {
    display: grid !important;
  }
  /* the name card shrinks to a strip: name, formula, and the slider when there is one */
  .info {
    left: var(--gap);
    right: var(--gap);
    width: auto;
    padding: 8px 10px 10px;
    border-radius: 16px;
    transition: opacity 0.2s, transform 0.25s;
  }
  .name {
    font-size: 19px;
  }
  /* the arrows sit on the card's middle, whatever is in it */
  .title {
    padding: 0 40px;
  }
  .title .round.sm {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
  }
  .title .round.sm[data-act='prev'] {
    left: 10px;
  }
  .title .round.sm[data-act='next'] {
    right: 10px;
  }
  .formula {
    margin-top: 2px;
    font-size: 15px;
  }
  .note {
    display: none;
  }
  .param {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
    padding: 0 4px;
  }
  .param label {
    gap: 6px;
    font-size: 13px;
  }
  .dock {
    bottom: calc(var(--gap) + env(safe-area-inset-bottom));
    gap: 22px;
  }
  /* the readout is one slim row: what you hear on the left, its actions on the right */
  .readout {
    left: var(--gap);
    right: var(--gap);
    min-width: 0;
    max-width: none;
    bottom: calc(104px + env(safe-area-inset-bottom));
    padding: 10px 8px 10px 16px;
    border-radius: 16px;
    flex-direction: row-reverse;
    justify-content: space-between;
  }
  /* the text takes only the room left of the icons, and long lines shrink to fit instead of running under them */
  .r-text {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
  }
  .readout .big,
  #r-note {
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .readout .big {
    font-size: 22px;
    line-height: 1.15;
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
  }
  #r-note {
    margin-top: 0;
    font-size: 14px;
    line-height: 1.3;
    /* a long note takes a second line instead of running under the icons */
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
  }
  .readout .small {
    display: none;
  }
  .r-actions {
    flex: none;
    flex-direction: row;
    gap: 0;
  }
  .r-actions button {
    width: 38px;
    height: 38px;
  }
  .r-actions button:hover {
    transform: translateY(-2px) scale(1.1);
  }
  .corner {
    top: auto;
    bottom: calc(var(--gap) + 14px + env(safe-area-inset-bottom));
  }
  .about {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    border-radius: 22px 22px 0 0;
    top: auto;
    padding: 22px 20px calc(20px + env(safe-area-inset-bottom));
    transform: translateY(100%);
    max-height: 80vh;
  }
  .about.open {
    transform: none;
  }
  /* settings become a sheet that rises from the bottom */
  .tools {
    left: 0;
    right: 0;
    bottom: 0;
  }
  .settings {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    border-radius: 22px 22px 0 0;
    padding: 18px 20px calc(18px + env(safe-area-inset-bottom));
    transform: translateY(100%);
    max-height: 80vh;
  }
  .settings.open {
    transform: none;
  }
  .tool-stack {
    display: none;
  }
  /* notifications: a card that slides down from the top, under the notch, over the name strip */
  .toast {
    left: var(--gap);
    right: var(--gap);
    top: calc(env(safe-area-inset-top) + var(--gap));
    max-width: none;
    padding: 14px 18px;
    border-radius: 16px;
    background: #19191c;
    color: var(--paper);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
    transform: translateY(calc(-100% - 24px));
  }
  .toast.show {
    transform: none;
  }
  .toast {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  body.toasting .info {
    opacity: 0;
    transform: translateY(-6px);
  }
  .hint {
    bottom: 45%;
    font-size: 17px;
    white-space: normal;
    text-align: center;
    width: calc(100% - 32px);
  }
  .limit {
    top: auto;
    bottom: 130px;
  }
  /* on a phone every popup is a sheet that slides up from the bottom, with a grip at its top */
  .gallery {
    padding: 0;
    place-items: end stretch;
  }
  .gallery-sheet {
    width: 100%;
    height: 80%;
    border-radius: 22px 22px 0 0;
    padding: 22px 16px 40px;
    transform: translateY(100%);
    /* a bottom sheet slides away the way it came */
    transition: transform 0.32s cubic-bezier(0.2, 0.8, 0.2, 1);
  }
  .pop::before,
  .gallery-sheet::before {
    content: '';
    display: block;
    width: 40px;
    height: 4px;
    margin: -10px auto 14px;
    border-radius: 2px;
    background: var(--surface-3);
  }
  /* corner buttons step aside while a sheet is up, so nothing sits on top of it */
  .snap-corner,
  .about-btn,
  .dock {
    transition: opacity 0.2s;
  }
  body.sheet-open .snap-corner,
  body.sheet-open .about-btn,
  body.sheet-open .dock,
  body.sheet-open .info,
  body.sheet-open .readout {
    opacity: 0;
    pointer-events: none;
  }
  body.sheet-open .info {
    transform: translateY(-8px);
  }
  .snap-corner {
    position: fixed;
    z-index: 4;
    left: var(--gap);
    bottom: calc(var(--gap) + 14px + env(safe-area-inset-bottom));
  }
  .set-links {
    display: flex !important;
    justify-content: flex-end;
  }
  .gallery-sheet h2 {
    font-size: 22px;
  }
  #g-search {
    width: 130px;
  }
  .cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
  .sheet {
    padding: 28px 22px;
  }
  .sheet h2 {
    font-size: 26px;
  }
  .sheet dl {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .sheet dd {
    margin-bottom: 8px;
  }
}

/* search: cards glide to their new places and fade, instead of snapping (browsers with view transitions) */
::view-transition-group(*) {
  animation-duration: 0.38s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
}
::view-transition-old(*),
::view-transition-new(*) {
  animation-duration: 0.26s;
}

/* computer layouts at any width: the readout stops before the centre buttons (half their row is about 102 px, plus
   a gap), and its lines shrink or trim instead of running under them */
@media (min-width: 761px) {
  .readout {
    max-width: min(420px, calc(50vw - 140px));
  }
  .readout .small {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
}

/* narrower computer windows have no room beside the centre buttons, so the readout sits just above them */
@media (min-width: 761px) and (max-width: 1180px) {
  .readout {
    min-width: 0;
    bottom: calc(var(--gap) + 96px);
    max-width: min(420px, calc(100vw - 2 * var(--gap) - 70px));
  }
}

/* short screens, like a laptop window made small or a phone on its side: the cards drop their extra lines */
@media (min-width: 761px) and (max-height: 600px) {
  .info {
    padding: 12px 14px 12px;
  }
  .info .note {
    display: none;
  }
  .readout .small {
    display: none;
  }
  .readout .big {
    font-size: 22px;
  }
}

/* the smallest phones: a tighter bottom row, so the corner buttons keep clear of the middle ones */
@media (max-width: 359px) {
  .dock {
    gap: 10px;
  }
  .dock .round.md,
  .snap-corner,
  .about-btn {
    width: 44px;
    height: 44px;
  }
  .random {
    width: 64px;
    height: 64px;
  }
  .snap-corner {
    left: 8px;
  }
  .corner {
    right: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after,
  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}