:root{color-scheme:dark;--page:#111b1b;--surface:#1a2827;--line:#344b46;--muted:#a7bab1;--paper:#f4eddb;--accent:#e5d4af}
*{box-sizing:border-box}body{margin:0;background:var(--page);color:var(--paper);font:1rem/1.55 system-ui,sans-serif}a{color:var(--accent);text-underline-offset:.22em}button{font:inherit;color:inherit;cursor:pointer}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}.shell{width:min(100% - 2rem,76rem);margin-inline:auto}.top{border-block-end:1px solid var(--line)}.top .shell{display:flex;justify-content:space-between;align-items:center;gap:.8rem;flex-wrap:wrap;padding-block:1rem}.brand{text-decoration:none;letter-spacing:.15em;font-size:.86rem;font-weight:800}.languages,.controls,.pager{display:flex;gap:.7rem;flex-wrap:wrap;align-items:center}.languages a{padding:.25rem .45rem}.languages [aria-current]{color:var(--paper);font-weight:700}main{padding-block:2rem 4rem}h1,h2,h3{line-height:1.16}h1{font-family:Georgia,serif;font-size:clamp(2rem,5vw,4.3rem);font-weight:500;margin:.25em 0 .5em}.eyebrow,.turn{color:var(--muted)}.board-image,.grid{width:100%;height:auto;display:block;aspect-ratio:1;border-radius:.3rem;overflow:hidden}.split{display:grid;grid-template-columns:minmax(0,32rem) minmax(0,1fr);gap:clamp(1rem,5vw,4rem);align-items:start}.prose{max-width:45rem}.prose section{margin:1.25rem 0}.prose p{white-space:pre-line}summary{cursor:pointer;color:var(--accent)}details{padding:.8rem 1rem;border:1px solid var(--line);border-radius:.55rem;margin-block:1rem}.controls{margin:.8rem 0}.action{background:#263936;border:1px solid var(--line);padding:.45rem .75rem;border-radius:.45rem}.grid{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));touch-action:manipulation}.square{border:0;padding:0;aspect-ratio:1;position:relative;display:grid;place-items:center}.square svg{width:86%;height:86%}.square[aria-pressed=true]{box-shadow:inset 0 0 0 .22rem #ffd665}.square:focus-visible{z-index:1;outline-offset:-3px}.square.target::after{content:"";position:absolute;width:23%;aspect-ratio:1;border-radius:100%;background:#15231b88;pointer-events:none}.status{min-height:1.6em;color:var(--accent)}.pager{margin-block:1rem}.library{padding-inline-start:1.25rem}.library li{padding:.2rem}.illustration{max-width:14rem;margin:1rem 0}@media(max-width:42rem){.split{grid-template-columns:minmax(0,1fr)}main{padding-block:1.25rem}}

[hidden] { display: none !important; }
.top .brand { display: inline-flex; align-items: center; gap: .45rem; }
.analytics-consent, .analytics-settings {
  position: fixed;
  z-index: 14;
  inset-inline-end: .65rem;
  inset-block-end: calc(.65rem + env(safe-area-inset-bottom, 0px));
  font-size: .875rem;
}
.analytics-consent {
  width: min(25rem, calc(100% - 1.3rem));
  padding: .85rem 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: .65rem;
  box-shadow: 0 .4rem 1.35rem #0006;
}
.analytics-consent p { margin: 0 0 .4rem; }
.analytics-choices { display: flex; flex-wrap: wrap; gap: .5rem; justify-content: end; margin-block-start: .6rem; }
.analytics-settings { font-size: .75rem; padding: .3rem .55rem; }
.brand img { display: block; flex: none; }

.field-page {
  --field-head: calc(3rem + env(safe-area-inset-top, 0px));
  --field-foot: max(.5rem, env(safe-area-inset-bottom, 0px));
  overflow: hidden;
}
.field-page main { padding: 0; }
.field-page .top {
  position: fixed;
  z-index: 3;
  inset: 0 0 auto;
  border-block-end: 1px solid var(--line);
  pointer-events: none;
  background: color-mix(in srgb, var(--page) 86%, transparent);
}
.field-page .top .shell {
  width: 100%;
  min-height: calc(var(--field-head) - 1px);
  padding: env(safe-area-inset-top, 0px) max(.85rem, env(safe-area-inset-right)) 0 max(.85rem, env(safe-area-inset-left));
  flex-wrap: nowrap;
}
.field-page .languages { gap: .3rem; flex-wrap: nowrap; }
.field-menu { position: relative; margin: 0; border: 0; padding: 0; }
.field-menu > summary {
  display: grid; place-items: center; width: 44px; height: 44px;
  list-style: none; pointer-events: auto; color: var(--paper);
}
.field-menu > summary::-webkit-details-marker { display: none; }
.field-language .language-options {
  position: absolute; inset-block-start: 100%; inset-inline-end: 0;
  z-index: 1;
  width: min(16rem, 84vw); max-height: min(24rem, 66dvh);
  margin: .25rem 0 0; padding: .25rem;
  overflow: auto; overscroll-behavior: contain; touch-action: pan-y;
  list-style: none; border: 1px solid var(--line); border-radius: .55rem;
  background: var(--surface); pointer-events: auto;
}
.languages .language-options [data-language] {
  display: flex; width: 100%; min-height: 44px; align-items: center; justify-content: space-between;
  gap: .5rem; padding: .4rem .65rem; font-size: .9rem; color: var(--paper);
  border: 0; border-radius: .3rem; background: transparent; text-align: start;
  font-weight: 400; text-decoration: none;
}
.languages .language-options [data-language]:hover,
.languages .language-options [aria-current] { background: #a7bab126; }
.languages .language-options [data-language][aria-current] { font-weight: 700; }
.language-options small { color: var(--muted); font-size: .67rem; }
.menu-status { position: absolute; inset: 100% 0 auto auto; z-index: 2; width: max-content; max-width: 80vw;
  margin: 0; padding: .3rem .5rem; border-radius: .3rem; background: var(--page); color: var(--accent); }
.field-page .top a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  pointer-events: auto;
  text-decoration: none;
}
.field-library { position: relative; margin: 0; border: 0; padding: 0; }
.field-library summary {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  pointer-events: auto;
}
.field-library summary::-webkit-details-marker { display: none; }
.field-library .library {
  position: absolute;
  inset: 100% 0 auto auto;
  width: min(18rem, 75dvw);
  max-height: 55dvh;
  overflow: auto;
  margin: .25rem 0 0;
  padding: .45rem .75rem;
  list-style: none;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: .5rem;
  pointer-events: auto;
}
.field-page .field-library .library a { font-size: .9rem; font-weight: 500; }
.field-title {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.field-pager {
  position: fixed;
  z-index: 3;
  inset: auto .85rem .65rem auto;
  margin: 0;
  padding: 0 .7rem;
  border: 1px solid var(--line);
  border-radius: .5rem;
  background: var(--page);
  font-size: .83rem;
}
.field-pager a { line-height: 2.65rem; }
.card-field[data-virtual] + .field-pager:not(:focus-within) { clip-path: inset(50%); pointer-events: none; }
.field-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.field-sprite svg { width: 0; height: 0; }
.card-field {
  --columns: 6;
  --tile: clamp(8rem, 14.8dvw, 15rem);
  --row: var(--tile);
  position: fixed;
  inset: 0;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-width: none;
  overflow-anchor: none;
  padding-block-end: var(--field-foot);
  background: radial-gradient(ellipse at center, #20322f, var(--page) 77%);
  cursor: grab;
}
.card-field:focus-visible { outline: 2px solid var(--accent); outline-offset: -3px; }
.card-field[data-dragging], .card-field[data-dragging] * { cursor: grabbing; }
.card-field[data-dragging] { user-select: none; }
.field-plane {
  --gap: clamp(.55rem, 1vw, 1rem);
  display: grid;
  grid-template-columns: repeat(var(--columns), var(--tile));
  grid-auto-rows: var(--row);
  gap: var(--gap);
  width: max-content;
  padding: max(var(--gap), calc((100dvh - var(--row)) / 2))
    max(var(--gap), calc((100dvw - var(--tile)) / 2));
}
.card-field[data-virtual] { overflow: clip; touch-action: none; }
.card-field[data-virtual] .field-plane {
  position: absolute;
  inset: 0 auto auto 0;
  display: block;
  width: var(--tile);
  height: var(--row);
  padding: 0;
  column-gap: var(--gap);
}
.card-field[data-virtual] .card {
  position: absolute;
  inset: 0 auto auto 0;
}
.card {
  min-width: 0;
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: .7rem;
  transition: border-color 140ms ease-out;
}
.card[data-state="closed"]:has(.card-face:focus-visible) { z-index: 1; }
@media (prefers-reduced-motion: no-preference) {
  .card-field[data-virtual] .card[data-state="closed"] { transform: var(--field-stretch, none); }
}
@media (hover: hover) {
  .card[data-state="closed"]:hover { border-color: var(--muted); }
}
.card-face {
  --solved-size: 1.65rem;
  display: block;
  position: relative;
  color: var(--paper);
  height: 100%;
  text-decoration: none;
  user-select: none;
  -webkit-user-drag: none;
}
.card-face svg { pointer-events: none; }
.card-face .board-image { border-radius: inherit; }
.card-face { --preview-light: #e9dfc9; --preview-dark: #aebdab; }
.card[data-tone="1"] .card-face { --preview-light: #a4b7a7; --preview-dark: #547568; }
.card-face { border-radius: inherit; }
.card-caption {
  position: absolute;
  inset: .35rem .35rem auto;
  display: flex;
  align-items: start;
  gap: .24rem;
  width: fit-content;
  max-width: calc(100% - .7rem);
  color: #fff;
}
.card-caption[data-corner^="bottom"] { inset-block: auto .35rem; }
.card-caption[data-corner$="right"] { margin-inline-start: auto; }
.solved-mark {
  position: absolute;
  top: .3rem;
  left: .3rem;
  color: #fff;
  pointer-events: none;
}
.solved-mark .control-icon { width: var(--solved-size); height: var(--solved-size); }
.solved-mark .action-keyline { stroke: #080909; stroke-width: 5; }
.solved-mark .action-face { stroke-width: 2.7; }
.card-face:has(.solved-mark) .card-caption[data-corner^="top"] {
  left: calc(var(--solved-size) + .45rem);
  max-width: calc(100% - var(--solved-size) - .8rem);
}
.turn-marker {
  position: absolute;
  inset: auto .35rem .35rem auto;
  width: .62rem;
  aspect-ratio: 1;
  border: 1px solid #111b1b;
  border-radius: 50%;
  background: #fff4d8;
}
.turn-marker[data-side="b"] { background: #203531; border-color: #f4eddb; }
.card-caption[data-corner^="bottom"] + .turn-marker { inset-block: .35rem auto; }
.card-type {
  display: inline-block;
  border-radius: 999px;
  background: #263936;
  color: var(--accent);
  padding: .08rem .45rem;
  font-size: .75rem;
  font-weight: 650;
}
.card h2 { font-size: .95rem; margin: .32rem 0 .18rem; }
.card-caption h2 {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  overflow-wrap: anywhere;
  margin: 0;
  padding: 1px 2px 2px;
  font-size: clamp(1.125rem, 1.5vw, 1.25rem);
  font-weight: 750;
  line-height: 1.18;
  -webkit-text-stroke: 2.25px #000;
  paint-order: stroke fill;
}
.card .turn { margin: 0; font-size: .82rem; }
.card[data-state="peek"] {
  z-index: 2;
  border-color: var(--accent);
}
.card[data-state="peek"] .card-face { visibility: hidden; }
.card-peek {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-rows: auto minmax(0,1fr);
  gap: .2rem;
  overflow: clip;
  touch-action: manipulation;
  cursor: auto;
  padding: .45rem;
  border-radius: inherit;
}
.card-peek-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .32rem;
}
.card-peek-header > div { min-width: 0; }
.heading-actions { display: flex; flex: none; }
.card-peek-header h2 { font-size: clamp(.88rem, 2.5vw, 1.12rem); margin: .08rem 0; overflow-wrap: anywhere; }
.card-peek-header .turn { font-size: .72rem; line-height: 1.2; }
.card-peek [data-player], .full-card [data-player] { min-height: 0; }

.puzzle-player {
  display: grid;
  height: 100%;
  grid-template: "board" minmax(0,1fr) "status" 2.35rem "controls" 2.75rem / minmax(0,1fr);
  gap: .25rem;
}
.board-region {
  grid-area: board;
  min-height: 0;
  container-type: size;
  display: grid;
  place-items: center;
}
.board-region .grid { direction: ltr; }
.puzzle-player .game-frame { width: min(100cqw,100cqh,32rem); }
.card-peek .board-region { align-items: start; }
.player-toolbar { grid-area: controls; display: flex; align-items: center; }
.player-toolbar:has(> .controls:not(:empty) + .controls) > .controls:last-child { display: none; }
.player-toolbar .icon-action svg { width: 22px; height: 22px; }
.player-indicator {
  position: absolute; inset: 50% auto auto 50%; translate: -50% -50%;
  width: 1.4rem; aspect-ratio: 1; border-radius: 50%;
  border: 2px solid #111b1b; border-top-color: #fff;
  background: #111b1b70; animation: loading-spin .7s linear infinite;
}
@keyframes loading-spin { to { rotate: 1turn; } }
.puzzle-player .status {
  grid-area: status;
  margin: 0;
  min-height: 0;
  align-self: center;
  font-size: .82rem;
  line-height: 1.25;
  overflow-wrap: anywhere;
}
.puzzle-player .controls {
  margin: 0;
  gap: .25rem;
}
.puzzle-player .controls:empty { display: none; }
.puzzle-player .action {
  min-height: 2.5rem;
  font-size: .86rem;
  line-height: 1.2;
  padding: .32rem .53rem;
  max-width: 100%;
  overflow-wrap: anywhere;
  background: #aec7b319;
}
.card-peek .icon-action, .puzzle-player .icon-action, .full-heading .icon-action {
  flex: none;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: #f4eddbdf;
}
.card-peek .icon-action:hover, .puzzle-player .icon-action:hover,
.card-peek .icon-action:focus-visible, .puzzle-player .icon-action:focus-visible { color: var(--paper); }
.control-icon { display: block; width: 20px; height: 20px; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.control-icon .action-keyline { stroke: #17232e; stroke-width: 3.2; }
.control-icon .action-face { stroke: currentColor; stroke-width: 1.4; }
.player-toolbar > .analysis-controls {
  display: grid;
  width: 100%;
  grid-template-columns: minmax(0,1fr) 44px minmax(0,1fr);
}
.analysis-controls > .controls { grid-column: 1; flex-wrap: nowrap; }
.analysis-controls > .controls .action:not(.icon-action) { padding-inline: .25rem; }
.analysis-controls > .analysis-link { grid-column: 2; color: inherit; }
.analysis-controls > button { grid-column: 3; justify-self: end; }
.card-peek .action, .full-card .action { text-decoration: none; }
.field-back { text-decoration: none; }
:is(.puzzle-page,.article-page) .top .shell { flex-wrap: nowrap; min-height: 3.25rem; padding-block: .25rem; }
:is(.puzzle-page,.article-page) .top { position: relative; z-index: 3; }
:is(.puzzle-page,.article-page) .languages { flex-wrap: nowrap; font-size: .8rem; }
.article-page .top .shell { gap: .45rem; }
.article-page .top .shell > a:not(.brand) {
  min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .85rem;
}
.full-heading { display: flex; align-items: start; justify-content: space-between; gap: .45rem; }
.full-heading .turn { line-height: 1.25; }
main:has(.full-card) { padding-block-start: .55rem; }
.full-card {
  border: 1px solid var(--line);
  border-radius: .85rem;
  background: var(--surface);
  padding: clamp(.55rem, 2vw, 1rem);
}
.full-card h1 { margin: .08rem 0 .15rem; font-size: clamp(1.2rem, 3vw, 2.2rem); }
.full-heading .turn { margin: 0 0 .4rem; font-size: .85rem; }
.full-card [data-player] > .board-image { width: min(100%,55dvh,32rem); margin-inline: auto; }
.full-card [data-player]:has(.puzzle-player) { height: var(--player-height,60dvh); }
.full-card .puzzle-player { max-inline-size: 32rem; margin-inline: auto; }
.full-card .prose { margin: .5rem auto 0; }
.full-card .prose section:first-child { margin-top: .5rem; }
.full-card .prose h2 { margin: .45rem 0 .5rem; }
.content-section + .content-section { border-top: 1px solid var(--line); padding-top: 1rem; }
.game-frame { position: relative; }
.hint-arrow { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.game-frame[data-feedback]::after {
  content: ''; position: absolute; inset: 0; border-radius: .3rem; pointer-events: none;
}
.game-frame[data-feedback="solved"]::after { box-shadow: inset 0 0 0 2px #e4ca81; }
.game-frame[data-feedback="retry"]::after { box-shadow: inset 0 0 0 2px #d4a18d; }
.puzzle-player:has([data-feedback="solved"]) .status { color: #f2d899; }
.game-frame[data-feedback="solved"]::after { animation: success-ring .55s ease-out; }
@keyframes success-ring { from { box-shadow: inset 0 0 0 5px #fff0aa, 0 0 1rem #e8d38190; } }
.success-burst { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.success-burst i {
  position: absolute; left: 50%; top: 50%; width: .32rem; height: .32rem; border-radius: 28%;
  background: var(--spark); animation: spark 1.25s cubic-bezier(.12,.65,.27,1) both;
}
@keyframes spark {
  60% { opacity: 1; }
  to { transform: translate(var(--dx), var(--dy)) rotate(140deg); opacity: 0; }
}
.share-dialog {
  width: min(28rem, calc(100vw - 1.5rem)); color: var(--paper); background: var(--surface);
  border: 1px solid var(--line); border-radius: .65rem; padding: .6rem;
}
.share-dialog::backdrop { background: #111b1bb5; }
.share-dialog form { display: flex; justify-content: end; }
.share-dialog .icon-action { padding: .65rem; border: 0; background: transparent; }
.share-link { display: flex; gap: .35rem; align-items: stretch; }
.share-link input { min-width: 0; flex: 1; border: 1px solid var(--line); border-radius: .3rem; padding: .4rem;
  background: var(--page); color: var(--paper); font: inherit; }
.share-link button { min-height: 44px; border: 1px solid var(--line); border-radius: .3rem; background: #a7bab126; padding: .3rem .55rem; }
.share-dialog p { margin: .15rem 0 0; min-height: 1.45em; font-size: .85rem; }
@media (orientation: landscape) and (max-height: 599px) {
  .full-card .puzzle-player { max-inline-size: none; }
  .puzzle-player {
    grid-template: "board status" minmax(0,1fr) "board controls" 2.75rem /
      minmax(0,1fr) minmax(9rem, 1fr);
    column-gap: .6rem;
  }
  .puzzle-player .status { align-self: end; }
  .card-peek { grid-template-rows: minmax(0,1fr); }
  .card-peek-header {
    position: absolute;
    inset-block-start: .55rem;
    inset-inline: calc(50% + .3rem) .55rem;
    z-index: 1;
  }
  .card-peek .board-region { align-items: center; }
  body:has(.full-card) .top .shell { padding-block: .25rem; }
}
@media (max-width: 52rem) {
  .card-field { --columns: 5; }
}
@media (max-width: 42rem) {
  .card-field {
    --columns: 3;
    --tile: clamp(5rem, calc((100dvw - 1.75rem)/3), 9rem);
  }
  .field-plane { --gap: .5rem; }
  .card-peek { padding: .55rem; }
}
@media (min-width: 100rem) {
  .card-field[data-virtual] { --tile: clamp(14rem, 14.8dvw, 20rem); }
}
@media (prefers-reduced-motion: reduce) {
  .game-frame[data-feedback="solved"]::after { animation: none; }
  .card { transition: none; }
  .player-indicator { animation: none; }
}