:root {
  --paper: #f3f0e7; --cell: #fbf9f3; --cell-out: #ebe7dc; --ink: #2d342e; --muted: #737a6c;
  --line: #d6d8cb; --line-strong: #c3c7b6; --hover: #e7e6dc;
  --coral: #c9664e; --coral-dark: #a54e3b; --coral-soft: #f3e2d6; --coral-softer: #f7ebe2;
  --sage: #5f8572; --sage-light: #e1e9dd; --sage-mid: #cddfc8; --gold: #c9973a;
  --piece-hi: #da8670; --piece-lo: #b65a43; --dot: #fbeee6;
  --pipe-l: 45%;
  --on-coral: #ffffff; --on-sage: #ffffff;
  --mini-line: #c3c7b6; --mini-fill: #f6f3ec; --mini-stripe: #c9664e40;
  --shadow: 0 1px 2px #2d342e24, 0 2px 8px #2d342e14;
  --dialog-shadow: 0 20px 80px #17221233;
  --backdrop: #26302166;
  --serif: Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color-scheme: light;
  font-family: var(--sans); color: var(--ink); background: var(--paper);
}
:root[data-theme="dark"] {
  --paper: #161814; --cell: #252922; --cell-out: #151714; --ink: #ece9df; --muted: #9da393;
  --line: #2f332c; --line-strong: #41463d; --hover: #2b2f28;
  --coral: #d2715a; --coral-dark: #e88b72; --coral-soft: #3b2b24; --coral-softer: #2e2420;
  --sage: #86ad98; --sage-light: #243129; --sage-mid: #2f4337; --gold: #e0b45c;
  --piece-hi: #df8a73; --piece-lo: #b85c45; --dot: #fff3ec;
  --pipe-l: 64%;
  --on-coral: #1d0f0a; --on-sage: #0f1612;
  --mini-line: #7b836f; --mini-fill: #30352c; --mini-stripe: #e0846b70;
  --shadow: 0 1px 2px #0006, 0 2px 8px #0004;
  --dialog-shadow: 0 20px 80px #000a;
  --backdrop: #000a;
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #161814; --cell: #252922; --cell-out: #151714; --ink: #ece9df; --muted: #9da393;
    --line: #2f332c; --line-strong: #41463d; --hover: #2b2f28;
    --coral: #d2715a; --coral-dark: #e88b72; --coral-soft: #3b2b24; --coral-softer: #2e2420;
    --sage: #86ad98; --sage-light: #243129; --sage-mid: #2f4337; --gold: #e0b45c;
    --piece-hi: #df8a73; --piece-lo: #b85c45; --dot: #fff3ec;
    --pipe-l: 64%;
  --on-coral: #1d0f0a; --on-sage: #0f1612;
  --mini-line: #7b836f; --mini-fill: #30352c; --mini-stripe: #e0846b70;
    --shadow: 0 1px 2px #0006, 0 2px 8px #0004;
    --dialog-shadow: 0 20px 80px #000a;
    --backdrop: #000a;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { --viewport-height: 100vh; --viewport-top: 0px; }
@supports (height: 100dvh) { html { --viewport-height: 100dvh; } }
/* The game fits on one screen; only dialogs should scroll. */
html, body { height: 100%; overflow: hidden; overscroll-behavior: none; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); transition: background-color .2s ease, color .2s ease; }
button, a, label { -webkit-tap-highlight-color: transparent; }
button { font: inherit; color: inherit; cursor: pointer; touch-action: manipulation; }
button:disabled { cursor: default; }
button:focus-visible, a:focus-visible, input:focus-visible + span, input:focus-visible + i { outline: 2px solid var(--sage); outline-offset: 3px; }
a { color: var(--sage); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }

/* Layout: a full-height grid whose middle row holds the largest square board. */
.game {
  position: fixed; top: var(--viewport-top); left: 0; right: 0;
  height: var(--viewport-height); min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  grid-template-rows: 68px minmax(0, 1fr);
  grid-template-areas: "meta score actions" "board board board";
  column-gap: 16px;
  padding: env(safe-area-inset-top) max(16px, env(safe-area-inset-right)) max(4px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
}
.board-meta { grid-area: meta; align-self: center; display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.stage { font-size: 18px; white-space: nowrap; color: var(--muted); }
#stage-number { color: var(--ink); font-variant-numeric: tabular-nums; font-weight: 600; }
.meta-line { font-size: 14px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.score-block { grid-area: score; align-self: center; justify-self: center; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.score { color: var(--ink); display: flex; align-items: baseline; gap: 7px; font-size: 26px; line-height: 1; font-variant-numeric: tabular-nums; white-space: nowrap; transition: color .3s ease; }
#current-count { font-weight: 600; display: inline-block; }
#current-count.bump { animation: count-bump .35s ease-out; }
.score-divider, #target-count { color: var(--muted); }
.score.complete, .score.complete #target-count { color: var(--sage); }
.progress-pips { display: flex; gap: 3px; height: 6px; align-items: center; }
.progress-pips i { width: 10px; height: 6px; border-radius: 2px; background: var(--line); transition: background-color .25s ease, transform .25s ease; }
.progress-pips i.on { background: var(--coral); }
.score.complete + .progress-pips i { background: var(--sage); }
.progress-pips .bar { width: 120px; height: 5px; border-radius: 3px; background: var(--line); overflow: hidden; }
.progress-pips .bar b { display: block; height: 100%; background: var(--coral); transition: width .25s ease; }
.score.complete + .progress-pips .bar b { background: var(--sage); }

.top-actions { grid-area: actions; justify-self: end; align-self: center; display: flex; align-items: center; gap: 6px; }
.controls { display: flex; align-items: center; gap: 2px; }
.control-divider { width: 1px; height: 22px; background: var(--line); margin: 0 6px; }
.icon-button { position: relative; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; width: 40px; height: 40px; padding: 0; color: var(--ink); background: transparent; border: 0; border-radius: 8px; flex-shrink: 0; text-decoration: none; transition: background-color .15s ease, opacity .15s ease, transform .1s ease; }
.icon-button svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; }
.icon-button:active:not(:disabled) { transform: scale(.94); }
.icon-button:disabled { opacity: .28; }
.button-label { display: none; font-size: 10.5px; line-height: 1; letter-spacing: .01em; }
#hint-button.busy svg { animation: hint-think .9s ease-in-out infinite; }
.leave-game { margin-left: 2px; }

/* Board */
.board-area { --status-h: 56px; grid-area: board; min-height: 0; min-width: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; container-type: size; }
.board-shell {
  --axis-space: 0px;
  --side: min(calc(100vw - 32px - 2 * var(--axis-space)), calc(var(--viewport-height) - 200px - var(--axis-space)));
  display: grid;
  grid-template-columns: var(--axis-space) var(--side) var(--axis-space);
  grid-template-rows: var(--axis-space) var(--side);
  grid-template-areas: ". north ." "west board .";
  flex: none;
  width: calc(var(--side) + 2 * var(--axis-space));
  height: calc(var(--side) + var(--axis-space));
}
/* Reserve both side margins so the square itself stays centered. */
.board-shell.pipe-grid { --axis-space: clamp(24px, 3vmin, 30px); }
.board-frame { grid-area: board; position: relative; width: var(--side); height: var(--side); }
@supports (width: 1cqw) {
  .board-shell { --side: min(calc(100cqw - 2 * var(--axis-space)), calc(100cqh - var(--status-h) - var(--axis-space))); }
}
.pipe-axis { color: var(--muted); font-size: clamp(10px, 1.7vmin, 12px); font-weight: 600; font-variant-numeric: tabular-nums; line-height: 1; user-select: none; }
.pipe-axis-north { grid-area: north; display: grid; align-items: end; padding-bottom: 7px; }
.pipe-axis-west { grid-area: west; display: grid; justify-items: end; padding-right: 7px; }
.pipe-axis span { display: grid; place-items: center; min-width: 0; min-height: 0; }
.pipe-grid .board-overlay { overflow: hidden; }
.board { -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; width: 100%; height: 100%; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; box-shadow: 0 1px 0 #ffffff40 inset; }
.board-overlay { position: absolute; inset: 1px; z-index: 4; width: calc(100% - 2px); height: calc(100% - 2px); pointer-events: none; overflow: visible; }
.cell { position: relative; min-width: 0; min-height: 0; background: var(--cell); padding: 0; border: 0; display: flex; align-items: center; justify-content: center; isolation: isolate; container-type: size; transition: background-color .15s ease; }
.cell.outside { background: var(--cell-out); cursor: default; }
.piece { display: none; position: absolute; inset: 13%; border-radius: max(3px, 7cqmin); pointer-events: none; }
.occupied .piece {
  display: block;
  background: linear-gradient(155deg, var(--piece-hi), var(--coral) 48%, var(--piece-lo));
  box-shadow: inset 0 1px 0 #ffffff38, inset 0 -1px 0 #00000018, var(--shadow);
  transition: background .2s ease, transform .16s ease, box-shadow .16s ease, opacity .2s ease;
}
.movable .piece:after { content: ''; position: absolute; top: 9%; right: 9%; width: max(4px, 11cqmin); height: max(4px, 11cqmin); border-radius: 50%; background: var(--dot); box-shadow: 0 0 0 max(1px, 2.5cqmin) #00000014; opacity: .92; }
.movable { cursor: pointer; touch-action: none; }
.selected { box-shadow: inset 0 0 0 2px var(--ink); z-index: 1; }
.selected .piece { background: linear-gradient(155deg, var(--coral), var(--coral-dark)); transform: translateY(-2%) scale(1.03); box-shadow: inset 0 1px 0 #ffffff30, 0 4px 14px #00000026; }
.destination { background: var(--coral-soft) !important; cursor: pointer; }
.destination:before, .k-origin:before, .preview:before { content: ''; position: absolute; inset: 13%; border: max(1.5px, 1.6cqmin) dashed var(--coral); border-radius: max(3px, 7cqmin); }
.destination:after { content: '↗'; font-size: max(12px, 30cqmin); line-height: 1; color: var(--coral); }
.preview { background: var(--coral-softer); }
.preview:before { border-color: color-mix(in srgb, var(--coral) 60%, transparent); }
.drop-ready { background: color-mix(in srgb, var(--coral-soft) 65%, var(--coral)) !important; }
.k-origin { background: var(--sage-light) !important; cursor: pointer; }
.k-origin:before { border-color: var(--sage); }
.k-origin:after { content: '+'; color: var(--sage); font-size: max(14px, 42cqmin); line-height: 1; font-weight: 300; }
.destination.k-origin { background: var(--coral-soft) !important; }
.destination.k-origin:before { border-color: var(--coral); }
.destination.k-origin:after { content: '↗'; color: var(--coral); font-size: max(12px, 30cqmin); font-weight: 400; }
.k-origin.hint-source:before { border-style: solid; box-shadow: 0 0 0 3px var(--sage-light), 0 0 0 4px var(--sage); }
.hint-source .piece { box-shadow: 0 0 0 3px var(--cell), 0 0 0 5px var(--sage); }
.coach { z-index: 2; }
.coach:not(.selected) { box-shadow: inset 0 0 0 3px var(--gold); animation: coach-pulse 1.5s ease-in-out infinite; }
.just-added .piece { animation: pop .42s cubic-bezier(.2, 1.4, .4, 1); }
.just-added:before { content: ''; position: absolute; inset: 13%; border-radius: max(3px, 7cqmin); border: 0; box-shadow: 0 0 0 0 var(--sage); animation: ring .6s ease-out forwards; }
.dragging { z-index: 6; }
.dragging .piece { transition: none; box-shadow: 0 10px 24px #0000003a; transform: none; }
.cell:focus-visible { outline: 2px solid var(--ink); outline-offset: -3px; z-index: 3; }
.board.solved .occupied .piece { background: linear-gradient(155deg, color-mix(in srgb, var(--sage) 80%, white), var(--sage) 55%, color-mix(in srgb, var(--sage) 80%, black)); }
.board.enter { animation: board-enter .38s cubic-bezier(.2, .8, .25, 1); }
.board.celebrate .occupied .piece { animation: wave .7s ease-out both; animation-delay: calc(var(--wave, 0) * 55ms); }

/* Pipes view */
.board.pipes .occupied .piece { background: transparent; box-shadow: none; inset: 6%; transform: none; }
.board.pipes .movable .piece:after { display: none; }
.board.pipes .selected .piece { background: transparent; }
.board.pipes.solved .occupied .piece { background: transparent; }
.board.pipes .destination:after, .board.pipes .destination.k-origin:after { content: ''; }
.board.pipes .k-origin:after { position: absolute; top: 4%; right: 8%; font-size: max(12px, 30cqmin); }
.pipe { fill: none; stroke-width: .13; stroke-linecap: round; stroke-linejoin: miter; transition: stroke-width .2s ease; }
.pipe-shadow { fill: none; stroke: var(--cell); stroke-width: .26; stroke-linecap: round; opacity: .9; }
.pipe-label { font: 600 .26px var(--sans); fill: var(--muted); text-anchor: middle; dominant-baseline: central; }
.move-arrow { fill: none; stroke: var(--coral-dark); stroke-width: .045; stroke-dasharray: .1 .09; stroke-linecap: round; opacity: .85; animation: dash 1s linear infinite; }
.move-arrow-head { fill: var(--coral-dark); opacity: .85; }

/* Status area beneath the board */
.status-area { position: relative; flex: none; width: 100%; height: var(--status-h); display: grid; place-items: center; }
.status-line { margin: 0; max-width: 680px; padding: 0 8px; font-size: 14px; line-height: 1.4; color: var(--muted); text-align: center; text-wrap: balance; }
.status-line.coach-line { color: var(--ink); }
.status-line.coach-line:before { content: 'Tutorial'; display: inline-block; margin-right: 8px; padding: 1px 7px; border-radius: 99px; background: var(--sage-light); color: var(--sage); font-size: 11.5px; font-weight: 600; letter-spacing: .02em; vertical-align: 1px; }
.status-line.warn { color: var(--coral-dark); }
.complete-banner { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; gap: 14px; animation: rise .35s ease-out; }
.complete-check { width: 28px; height: 28px; flex-shrink: 0; fill: none; stroke: var(--sage); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.complete-text { display: flex; flex-direction: column; line-height: 1.25; min-width: 0; }
#complete-title { font-size: 15px; color: var(--ink); }
#complete-stats { font-size: 13px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.next-button { position: relative; overflow: hidden; display: inline-flex; align-items: center; gap: 6px; padding: 9px 14px 9px 16px; border: 0; border-radius: 99px; background: var(--sage); color: var(--on-sage); font-size: 14px; font-weight: 600; white-space: nowrap; box-shadow: var(--shadow); }
.next-button svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.countdown { position: absolute; left: 0; bottom: 0; height: 3px; width: 100%; background: color-mix(in srgb, var(--on-sage) 45%, transparent); transform-origin: left; transform: scaleX(0); }
.complete-banner.counting .countdown { animation: countdown var(--advance-ms, 2600ms) linear forwards; }

.notice { display: none !important; position: fixed; left: 50%; bottom: 76px; transform: translateX(-50%); max-width: calc(100% - 48px); margin: 0; padding: 11px 18px; border: 1px solid var(--line); border-radius: 10px; background: var(--cell); box-shadow: 0 6px 24px #00000022; color: var(--ink); font-size: 13.5px; line-height: 1.5; text-align: center; z-index: 4; pointer-events: none; animation: rise .25s ease-out; }

/* Dialogs */
.rules-dialog { position: fixed; top: var(--viewport-top); bottom: calc(100% - var(--viewport-top) - var(--viewport-height)); width: min(640px, calc(100% - 32px)); max-height: calc(var(--viewport-height) - 32px - env(safe-area-inset-top) - env(safe-area-inset-bottom)); overflow-y: auto; overscroll-behavior: contain; padding: 24px; color: var(--ink); background: var(--cell); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--dialog-shadow); }
.rules-dialog[open] { animation: dialog-in .2s ease-out; }
.rules-dialog::backdrop { background: var(--backdrop); backdrop-filter: blur(3px); }
.dialog-heading { position: sticky; top: -24px; z-index: 1; display: flex; align-items: center; justify-content: space-between; margin: -24px -24px 8px; padding: 18px 18px 6px 24px; background: var(--cell); }
.dialog-heading h2 { font-family: var(--serif); font-size: 30px; font-weight: 400; margin: 0; }
.rules-dialog p { font-size: 14px; line-height: 1.7; margin: 12px 0; color: var(--muted); }
.rules-dialog .rules-goal { color: var(--ink); }
.rules-dialog h3 { font-size: 14px; margin: 0 0 14px; font-weight: 600; }
.reset-dialog { width: min(380px, calc(100% - 32px)); }
.reset-dialog p { margin: 0 0 22px; color: var(--ink); font-size: 16px; }
.reset-dialog p.dialog-note { margin-top: -14px; color: var(--muted); font-size: 13.5px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; }
.dialog-button { min-width: 64px; padding: 9px 16px; border: 1px solid var(--line-strong); border-radius: 8px; background: transparent; font-size: 14px; }
.dialog-button.wide { width: 100%; text-align: left; }
.confirm-reset { background: var(--coral); border-color: var(--coral); color: var(--on-coral); }
.rules-move-comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; border-block: 1px solid var(--line); padding: 16px 0; }
.move-diagram { display: flex; align-items: center; gap: 16px; color: var(--muted); }
.mini-board { --mini-cell: 22px; display: grid; grid-template-columns: repeat(2, var(--mini-cell)); grid-template-rows: repeat(2, var(--mini-cell)); gap: 3px; }
.jump-diagram { margin-top: 12px; }
.jump-board { grid-template-rows: repeat(4, var(--mini-cell)); }
.mini-board i { border: 1px solid var(--mini-line); border-radius: 3px; background: var(--mini-fill); }
.mini-board .filled { background: var(--coral); border-color: var(--coral); }
.mini-board .added { background: var(--sage); border-color: var(--sage); }
.mini-board .arrived { animation: mini-arrive 2.6s ease-in-out infinite; }
.mini-board .origin { border: 1px dashed var(--sage); color: var(--sage); background: var(--sage-light); display: flex; align-items: center; justify-content: center; font-style: normal; }
.mini-board .origin:after { content: '+'; }
.rules-illegal, .rules-controls { border-top: 1px solid var(--line); padding-top: 14px; margin-top: 14px; }
.illegal-examples { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.illegal-examples figure { margin: 0; }
.illegal-examples .move-diagram { min-height: 72px; }
.illegal-examples figcaption { margin-top: 12px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.blocked-jump-board { grid-template-rows: repeat(3, var(--mini-cell)); }
.blocked-arrow { width: 28px; height: 24px; flex-shrink: 0; color: var(--coral-dark); fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.mini-board .attempted-source { outline: 2px solid var(--ink); outline-offset: 2px; }
.mini-board .attempted-destination { border: 1px dashed var(--coral-dark); background: repeating-linear-gradient(135deg, var(--mini-fill) 0 4px, var(--mini-stripe) 4px 7px); }
.shortcut-list { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 24px; margin: 0; font-size: 13px; color: var(--muted); }
.shortcut-list div { display: flex; flex-direction: column; gap: 2px; }
.shortcut-list div:first-child { grid-column: 1 / -1; }
.shortcut-list dt { color: var(--ink); font-weight: 500; }
.shortcut-list dd { margin: 0; line-height: 1.5; }
kbd { display: inline-block; min-width: 20px; padding: 1px 5px; margin-right: 2px; border: 1px solid var(--line-strong); border-bottom-width: 2px; border-radius: 4px; background: var(--paper); font: 600 11.5px var(--sans); text-align: center; }

/* Settings */
.settings-dialog { width: min(440px, calc(100% - 32px)); }
.setting { border: 0; padding: 0; margin: 0 0 20px; min-width: 0; }
.setting legend { padding: 0; margin-bottom: 9px; font-size: 13px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.rules-dialog p.setting-help { font-size: 13px; line-height: 1.55; margin: 9px 0 0; }
.segmented { display: grid; grid-auto-columns: 1fr; grid-auto-flow: column; gap: 4px; padding: 4px; border-radius: 10px; background: var(--paper); border: 1px solid var(--line); }
.segmented label { position: relative; cursor: pointer; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 8px 10px; border-radius: 7px; font-size: 14px; color: var(--muted); transition: background-color .15s ease, color .15s ease; }
.segmented input:checked + span { background: var(--cell); color: var(--ink); box-shadow: var(--shadow); font-weight: 500; }
.style-swatch { width: 22px; height: 22px; border-radius: 4px; flex-shrink: 0; }
.tiles-swatch { background: linear-gradient(155deg, var(--piece-hi), var(--coral) 50%, var(--piece-lo)); box-shadow: inset 0 0 0 4px var(--cell); }
.pipes-swatch { background:
  linear-gradient(var(--coral), var(--coral)) center / 3px 100% no-repeat,
  linear-gradient(var(--sage), var(--sage)) center / 100% 3px no-repeat, var(--cell); border: 1px solid var(--line); }
.switch-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 4px 0; font-size: 15px; cursor: pointer; }
.switch-row input { position: absolute; opacity: 0; pointer-events: none; }
.switch { position: relative; width: 42px; height: 24px; border-radius: 99px; background: var(--line-strong); transition: background-color .2s ease; flex-shrink: 0; }
.switch:after { content: ''; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px #0003; transition: transform .2s ease; }
.switch-row input:checked + .switch { background: var(--sage); }
.switch-row input:checked + .switch:after { transform: translateX(18px); }
.danger-zone { margin-bottom: 0; }
.danger-zone .dialog-button { color: var(--coral-dark); }

.rules-dialog .paper-credit { font-size: 12.5px; line-height: 1.6; margin: 18px 0 0; border-top: 1px solid var(--line); padding-top: 14px; }

/* Hover feedback only where a pointer can hover; on touch screens it would stick after a tap. */
@media (hover: hover) {
  .icon-button:hover:not(:disabled) { background: var(--hover); }
  .cell:not(.outside):hover { background: color-mix(in srgb, var(--cell) 70%, var(--hover)); }
  .board:not(.pipes) .occupied:hover .piece { transform: translateY(-1.5%); }
  .destination:hover { background: color-mix(in srgb, var(--coral-soft) 75%, var(--coral)) !important; }
  .k-origin:not(.destination):hover { background: var(--sage-mid) !important; }
  .next-button:hover { filter: brightness(1.06); }
  .dialog-button:hover { background: var(--hover); }
  .confirm-reset:hover { background: var(--coral-dark); border-color: var(--coral-dark); }
  .segmented label:hover span { color: var(--ink); }
}
@media (hover: none) {
  .cell:not(.outside):active { background: color-mix(in srgb, var(--cell) 60%, var(--hover)); }
  .icon-button:active:not(:disabled), .dialog-button:active { background: var(--hover); }
}
/* Animations */
@keyframes pop { 0% { transform: scale(.35); opacity: .3; } 70% { transform: scale(1.08); opacity: 1; } 100% { transform: scale(1); } }
@keyframes ring { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--sage) 80%, transparent); } 100% { box-shadow: 0 0 0 max(8px, 22cqmin) transparent; } }
@keyframes wave { 0% { transform: none; } 35% { transform: scale(1.12) translateY(-4%); } 70% { transform: scale(.97); } 100% { transform: none; } }
@keyframes coach-pulse { 0%, 100% { box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--gold) 90%, transparent); } 50% { box-shadow: inset 0 0 0 5px color-mix(in srgb, var(--gold) 55%, transparent); } }
@keyframes count-bump { 0% { transform: scale(1); } 40% { transform: scale(1.3); color: var(--sage); } 100% { transform: scale(1); } }
@keyframes rise { from { opacity: 0; transform: translate(var(--rise-x, 0), 8px); } to { opacity: 1; transform: translate(var(--rise-x, 0), 0); } }
.notice { --rise-x: -50%; }
@keyframes dialog-in { from { opacity: 0; transform: translateY(10px) scale(.98); } to { opacity: 1; transform: none; } }
@keyframes board-enter { from { opacity: 0; transform: scale(.97); } to { opacity: 1; transform: none; } }
@keyframes countdown { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@keyframes dash { to { stroke-dashoffset: -.38; } }
@keyframes hint-think { 0%, 100% { transform: none; } 50% { transform: translateY(-2px); } }
@keyframes mini-arrive { 0%, 55%, 100% { transform: none; box-shadow: none; } 70% { transform: scale(1.18); box-shadow: 0 0 0 3px color-mix(in srgb, var(--coral) 30%, transparent); } }

/* Phones held upright: controls move to a labelled bar within thumb reach. */
@media (max-width: 760px) and (min-height: 521px), (max-width: 480px) {
  .game {
    grid-template-rows: 64px minmax(0, 1fr) auto;
    grid-template-areas: "meta score actions" "board board board" "controls controls controls";
    column-gap: 8px;
    padding: env(safe-area-inset-top) max(10px, env(safe-area-inset-right)) 0 max(10px, env(safe-area-inset-left));
  }
  .top-actions { display: contents; }
  .leave-game { grid-area: actions; justify-self: end; align-self: center; margin: 0; }
  .controls { grid-area: controls; justify-content: space-around; gap: 0; padding: 6px 0 max(8px, env(safe-area-inset-bottom)); border-top: 1px solid var(--line); }
  .controls .icon-button { width: auto; min-width: 48px; height: 52px; padding: 0 4px; }
  .controls .button-label { display: block; color: var(--muted); }
  .control-divider { display: none; }
  .stage { font-size: 16px; }
  .meta-line { font-size: 12.5px; }
  .score { font-size: 23px; gap: 5px; }
  .progress-pips i { width: 8px; }
  .progress-pips .bar { width: 84px; }
  .status-line { font-size: 13px; }
  .complete-banner { gap: 10px; }
  .complete-check { display: none; }
  #complete-title { font-size: 14px; }
  #complete-stats { font-size: 12px; }
  .next-button { padding: 8px 12px 8px 14px; font-size: 13.5px; }
  .notice { bottom: 92px; }
  .rules-dialog { padding: 20px; }
  .dialog-heading { top: -20px; margin: -20px -20px 8px; padding: 14px 14px 6px 20px; }
  .rules-move-comparison, .illegal-examples { gap: 18px; }
  .move-diagram { gap: 12px; }
  .mini-board { --mini-cell: 18px; }
  .shortcut-list { grid-template-columns: 1fr; }
}
@media (max-width: 360px) {
  .controls .icon-button { min-width: 42px; }
  .controls .button-label { font-size: 9.5px; }
  .controls .icon-button svg { width: 20px; height: 20px; }
}
/* Medium widths: let the score take the space between meta and controls. */
@media (max-width: 1040px) {
  .game { grid-template-columns: auto minmax(0, 1fr) auto; }
  .icon-button { width: 36px; }
  .control-divider { margin: 0 3px; }
}
/* Small phones turned sideways: tighten the top bar so nothing overlaps. */
@media (max-width: 700px) and (max-height: 520px) {
  .game { column-gap: 8px; }
  .icon-button { width: 31px; height: 36px; }
  .icon-button svg { width: 19px; height: 19px; }
  .control-divider { display: none; }
  .controls { gap: 0; }
  .stage { font-size: 15px; }
  .meta-line { font-size: 12px; }
  .score { font-size: 20px; gap: 4px; }
  .progress-pips i { width: 7px; }
}
/* Short landscape screens: keep the board as large as possible. */
@media (max-height: 520px) and (min-width: 481px) {
  .game { grid-template-rows: 56px minmax(0, 1fr); }
  .board-area { --status-h: 44px; }
}
@media (prefers-reduced-motion: reduce) { *, *:before, *:after { animation: none !important; transition: none !important; } }