:root{color-scheme:light;--paper:#f4f2e9;--surface:#fcfcf6;--ink:#283c34;--muted:#6e796a;--line:#dce2d3;--green:#45684a;--orange:#ba613e}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,"WenQuanYi Zen Hei","PingFang SC",sans-serif}
button,select{font:inherit;color:inherit}
button,a,select{-webkit-tap-highlight-color:transparent;touch-action:manipulation}
button{cursor:pointer;background:transparent;border:1px solid var(--line);border-radius:8px;padding:9px 12px}
@media(hover:hover) and (pointer:fine){button:hover{background:#e8ecdf}}
button:disabled{opacity:.5;cursor:default}
button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:3px}
[hidden]{display:none!important}
header{max-width:560px;margin:auto;padding:16px 20px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);font-size:19px}
.seal{background:var(--orange);color:var(--paper);padding:3px 6px;border-radius:4px;font-family:serif}
#open-menu{border:0;font-size:12px;color:var(--muted)}
main{max-width:560px;margin:0 auto;padding:0 16px 24px}
.game{padding:22px 26px 14px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:0 8px 30px #394b3208}
.game-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}
h1{font-size:22px;font-weight:500;margin:5px 0 0}
h2{font-size:21px;font-weight:500;margin:0}
.eyebrow{font-size:11px;letter-spacing:1px;color:var(--muted);margin:0}
.counter{white-space:nowrap;font-size:13px;color:var(--muted)}
.counter b{font-size:25px;font-weight:500;color:var(--ink);margin-right:5px}
.progress{height:3px;background:#e9ecdf;border-radius:4px;overflow:hidden;margin:14px 0}
#progress-fill{height:100%;background:#7f9a65;transition:width .25s}
.trace-controls{padding:8px 4px;border:1px solid transparent;border-radius:10px}
.selection{display:flex;justify-content:center;align-items:center;gap:8px}
#slots{display:flex;gap:6px}
#slots span{width:38px;height:42px;display:grid;place-items:center;border-radius:6px;background:#eff2e7;font-family:serif;font-size:23px}
#clear{font-size:11px;padding:8px 4px;border:0;color:var(--muted)}
.trace-guide{min-height:29px;display:flex;justify-content:center;align-items:center;gap:8px;margin-top:5px}
#trace-status{font-size:11px;line-height:1.5;color:var(--muted);margin:0}
#stop-trace{padding:4px 8px;font-size:11px;background:var(--surface)}
.touch-tip{display:none;margin:7px 0 0;text-align:center;font-size:11px;color:var(--muted)}
#board,.assembly-board-exit{position:relative;width:100%;max-width:400px;margin:10px auto;touch-action:none;user-select:none;aspect-ratio:1;background-image:linear-gradient(to right,#e8ecdf 1px,transparent 1px),linear-gradient(to bottom,#e8ecdf 1px,transparent 1px);background-size:calc(100% / var(--columns)) calc(100% / var(--rows));border-right:1px solid #e8ecdf;border-bottom:1px solid #e8ecdf;border-radius:8px}
#edges,#nodes{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
#edges{z-index:1}
#nodes{z-index:2}
#edges line{stroke:#91a582;stroke-width:2.5;stroke-linecap:round}
#edges line.selected{stroke:var(--orange);stroke-width:4}
.node{position:absolute;transform:translate(-50%,-50%);width:52px;height:52px;display:grid;place-items:center;border:1.5px solid #96aa85;border-radius:11px;background:var(--surface);padding:0;font-family:serif;font-size:25px;box-shadow:0 2px 0 #e5e9dc;pointer-events:auto;touch-action:none;transition:background .12s,color .12s}
.node small{position:absolute;right:-4px;top:-5px;font:9px Arial;background:#e8eedc;color:#5d764c;border:2px solid var(--surface);border-radius:12px;min-width:17px;padding:2px}
.node.available{background:#fff1c9;border-color:#b48a3f;box-shadow:0 0 0 2px #d9b96b55}
.node.active{background:var(--green);border-color:var(--green);color:white}
.node.flower{pointer-events:none;border-color:transparent;background:#fff0ed;box-shadow:none;opacity:1}
.node.flower img{width:32px;height:32px;pointer-events:none}
.node.selection-head{outline:3px solid var(--orange);outline-offset:3px}
#board.tracing,#board.tracing .node{cursor:crosshair}
#message{min-height:20px;font-size:11px;line-height:1.6;text-align:center;color:var(--muted);margin:8px 0}
#hint-output{text-align:center;background:#edf1e5;color:var(--green);border-radius:8px;padding:9px;font-size:17px;letter-spacing:2px;margin:8px 0}
.actions{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:6px}
.actions button{border:0;font-size:12px;padding:9px 4px}
#help{color:var(--muted)}
#collection{border-top:1px solid var(--line);margin:8px 0 12px;padding-top:10px;font-size:12px}
#collection-label{font-size:12px;font-weight:normal;color:var(--muted);margin:0}
#found{display:flex;flex-wrap:wrap;gap:6px 16px;padding-top:8px}
.entry{font-size:14px;padding:4px 0}
.entry b{font-weight:normal;display:inline-block;transform-origin:left center}
.entry b.arriving-word{position:relative;z-index:5;pointer-events:none}
.entry b:before{content:'✿';color:#d9655a;margin-right:5px}
#victory{position:absolute;z-index:3;inset:10px;background:#fcfcf6f5;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;border-radius:12px;padding:15px}
#victory h2{margin-top:12px;font-family:serif;font-size:25px}
#next-note{font-size:12px;color:var(--muted);margin:10px 0 18px}
#replay{border:0;margin-top:8px;font-size:12px;color:var(--muted)}
.primary{background:var(--ink);color:white;border:0}
@media(hover:hover) and (pointer:fine){.primary:hover{background:var(--green)}}
dialog{max-width:480px;width:calc(100% - 28px);max-height:85dvh;overflow:auto;border:1px solid var(--line);border-radius:16px;padding:22px;background:var(--surface);color:var(--ink)}
dialog::backdrop{background:#20312670;backdrop-filter:blur(3px)}
.dialog-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:16px}
.dialog-heading button{border:0;font-size:24px;padding:0 7px}
dialog ol{padding-left:20px;margin:0}
dialog li,dialog>p{font-size:13px;line-height:1.8}
dialog li{margin-bottom:12px}
dialog .primary{width:100%;margin-top:12px}
#levels{display:grid;gap:7px}
#levels button{display:flex;justify-content:space-between;align-items:center;gap:8px;text-align:left;padding:10px 12px;font-size:12px}
#levels button b{font-size:13px;font-weight:normal}
#levels button span{font-size:10px;color:var(--muted);white-space:nowrap}
#levels button.current{border-color:var(--green);background:#edf1e5}
.level-group{font-size:11px;color:var(--muted);margin:10px 0 1px}
#open-tutorial,#archive-link{display:block;font-size:12px;color:var(--muted);margin-top:14px;border:0;padding:0}
#archive-link{text-align:right}
.settings{border-top:1px solid var(--line);margin-top:20px;padding-top:16px}
.line-options{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px}
#line-mode{flex:1;min-width:0;max-width:100%;padding:9px 7px;background:var(--surface);border:1px solid var(--line);border-radius:7px}
#line-mode-description{flex-basis:100%;font-size:11px;color:var(--muted);line-height:1.7;margin:0}
#mode-note,.note{font-size:11px;color:var(--muted);line-height:1.7;margin:8px 0}
.reset-actions{display:flex;justify-content:space-between;gap:10px;margin-top:16px}
.reset-actions button{font-size:11px}
#reset-all{color:var(--muted);border:0}
@media(max-width:520px){header{padding:12px 16px}main{padding:0 10px 16px}.game{padding:16px 14px 10px;border-radius:14px}h1{font-size:20px}.node{width:44px;height:44px;font-size:23px}#board,.assembly-board-exit{max-width:360px}dialog{padding:18px}}
@media(max-width:350px){.game{padding:14px 10px 10px}.selection{gap:6px}#slots span{width:34px;height:38px}#slots{gap:5px}.node{width:40px;height:40px;font-size:22px}}
@media(hover:none){.trace-guide{display:none}.touch-tip{display:block}.tracing .trace-guide{display:flex}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
/* Moon-letter experiment: scoped to its board, with numbered extraction slots. */
#meta-panel{padding:16px;border:1px solid #ddd6ba;border-radius:14px;background:linear-gradient(135deg,#f9f5e5,#f2f4ef);margin:16px 0;color:#33483f}
.meta-heading{display:flex;align-items:center;justify-content:space-between;gap:10px}
.meta-heading h2{font-family:serif;font-size:20px;margin-top:5px}
.meta-heading .eyebrow{font-size:10px;letter-spacing:1px;color:#827449}
.meta-moon{--lit:0%;position:relative;flex:0 0 38px;height:38px;border-radius:50%;background:#d7dfd6;box-shadow:0 0 18px #d5ba6540;overflow:hidden}
.meta-moon:after{content:'';position:absolute;inset:0;background:#d9bb6a;clip-path:inset(0 calc(100% - var(--lit)) 0 0);transition:clip-path .6s ease}
#meta-poem{display:grid;justify-content:center;gap:9px;margin-top:16px}
.poem-line{display:flex;gap:9px}
.poem-cell{position:relative;width:38px;height:42px;border-bottom:1px solid #cfc7a9;display:grid;place-items:center;color:#a19a82}
.poem-cell small{position:absolute;top:-5px;right:0;font:9px Arial;color:#857952}
.poem-cell b{font:26px serif;font-weight:normal}
.poem-cell.filled{color:#695020;border-color:#b89446;background:#fff8df;border-radius:5px 5px 0 0}
#meta-progress{margin:12px 0 0;text-align:center;font-size:11px;color:#78612e}
#meta-instruction{font-size:11px;line-height:1.7;color:#6b715e;text-align:center;margin:6px 0 0}
#meta-credit{display:block;text-align:center;font-size:11px;color:#78612e;margin-top:8px;text-underline-offset:3px}
#meta-panel.complete{border-color:#b99a55;box-shadow:0 0 22px #d9bb6a24}
#meta-current{font-size:12px;line-height:1.7;margin:14px 0 4px;padding-left:10px;border-left:2px solid #bca464;color:#6c623f}
#slots .extract-cell{position:relative;background:#fff2cc;border:1px solid #ba9547;color:#715622}
#slots .extract-cell:after{content:attr(data-letter);position:absolute;right:3px;top:2px;font:9px Arial}
#meta-checklist{margin:18px 0 14px;border-top:1px solid var(--line);padding-top:14px}
.meta-list-heading{display:flex;align-items:center;justify-content:space-between}
.meta-list-heading h2{font-family:serif;font-size:19px}
#meta-list-count{font-size:11px;color:var(--muted)}
.meta-list-note,.meta-footnote{font-size:11px;line-height:1.7;color:var(--muted);margin:8px 0 12px}
#meta-answers{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.meta-answer{display:flex;flex-direction:column;align-items:stretch;gap:8px;text-align:left;border-radius:10px;background:#fafbf5;padding:11px;min-width:0}
.meta-answer-heading{display:flex;justify-content:space-between;gap:3px;font-size:10px;color:var(--muted)}
.meta-answer-heading>span:last-child{font-size:9px}
.meta-answer-slots{display:flex;gap:5px}
.meta-answer-slots>span{position:relative;display:grid;place-items:center;background:#edf0e6;border:1px solid transparent;border-radius:4px;width:30px;height:34px}
.meta-answer-slots b{font:21px serif;font-weight:normal}
.meta-answer-slots .extract-cell{border-color:#ba9547;background:#fff2cc;color:#715622}
.meta-answer-slots small{position:absolute;top:1px;right:2px;font:8px Arial}
.meta-clue{font-size:11px;line-height:1.65}
.meta-answer.focused{border-color:#a68a42;box-shadow:0 0 0 1px #a68a42}
.meta-answer.solved{background:#eef3e8}
.meta-answer.solved .meta-answer-heading>span:last-child{color:var(--green)}
.moon-game #victory{background:#faf7eaf5}
@media(max-width:400px){#meta-panel{padding:13px}.meta-heading h2{font-size:19px}.meta-answer{padding:9px 7px}.meta-answer-slots{gap:3px}.meta-answer-slots>span{width:26px;height:31px}.meta-answer-slots b{font-size:19px}.meta-answer-heading{flex-wrap:wrap;gap:2px}}

.poem-cell.given{background:transparent;color:var(--muted);border-bottom-style:dashed;border-color:#a6b09a}
.poem-cell.given:after{content:'赠';position:absolute;bottom:-3px;right:-6px;font:8px sans-serif;background:var(--surface);color:var(--muted);padding:1px}
/* Two-stage experiment: the poem workspace exists only after the board is cleared. */
#assembly-intro{background:#edf2ee;border-left:2px solid #73998a;border-radius:4px 9px 9px 4px;padding:10px 12px;margin:12px 0}
#assembly-intro p{font-size:12px;line-height:1.7;margin:5px 0 0;color:#597365}
#assembly-screen{padding-top:8px;scroll-margin-top:20px}
#assembly-heading{font-family:serif;font-size:24px;margin:8px 0 12px}
.assembly-instruction{font-size:13px;line-height:1.8;color:#607566;margin:0 0 16px}
#assembly-count{text-align:center;font-size:12px;color:var(--muted);margin:12px 0 6px}
.assembly-tip{font-size:11px;line-height:1.7;color:var(--muted);text-align:center;margin:0 0 12px}
#assembly-controls{display:flex;justify-content:center;align-items:center;gap:14px}
#assembly-clear{border:0;font-size:12px;color:var(--muted)}
#assembly-feedback{font-size:12px;line-height:1.7;text-align:center;color:#755c2d;min-height:20px;margin:10px 0}
#assembly-pool{display:grid;grid-template-columns:1fr 1fr;gap:11px;margin:20px 0 10px}
.assembly-word{display:flex;justify-content:center;gap:3px;padding:10px 4px;background:#f1f4ec;border:1px solid #e0e5d8;border-radius:10px}
.assembly-word button{padding:0;width:36px;height:43px;border:1px solid transparent;font:23px serif;background:#fcfcf6;border-radius:5px}
@media(hover:hover) and (pointer:fine){.assembly-word button:hover{border-color:#8fa486;background:#e9efdf}}
.assembly-word button.picked{background:#dcc378;color:#3b361e;border-color:#ad9146}
.assembly-word.used{border-color:#b8c4ab}
.assembly-word button:disabled{opacity:1;cursor:default}
#assembly-credit{display:block;text-align:center;color:#78612e;font-size:12px;text-underline-offset:3px;margin:12px 0}
#assembly-finish{text-align:center;margin:14px 0;padding:14px;border-radius:12px;background:#f7f0d9}
#assembly-finish p{font-family:serif;font-size:16px;line-height:1.8;margin:0 0 14px}
#assembly-replay{border:0;font-size:12px;margin-left:8px}
@media(max-width:400px){.assembly-word button{width:29px;height:40px;font-size:21px}.assembly-word{gap:2px;padding:8px 3px}}
/* The chosen characters share a central axis; their source idioms stay readable. */
main:has(.assembly-unlocked){max-width:820px}
#assembly-pool{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:24px 0 18px}
.assembly-column{--char-step:38px;position:relative;padding:18px 0 22px;background:linear-gradient(90deg,#f3f2e8,#faf5df 50%,#f3f2e8);border:1px solid #dddcc8;border-radius:60px 60px 12px 12px}
.assembly-column:first-child{grid-column:2;grid-row:1}
.assembly-column:last-child{grid-column:1;grid-row:1}
.assembly-column:before{content:'';position:absolute;top:55px;bottom:20px;left:50%;width:1px;background:#c7b67350}
.assembly-column h3{position:relative;text-align:center;font-size:11px;font-weight:400;letter-spacing:4px;color:#8c805c;margin:0 0 18px}
.assembly-word{position:relative;display:flex;justify-content:center;background:none;border:0;border-radius:0;padding:8px 0;min-height:64px}
.assembly-ribbon{display:flex;gap:0;transform:translateX(calc(var(--shift,0) * var(--char-step)));transition:transform 850ms cubic-bezier(.22,.61,.36,1)}
.assembly-word button{flex:0 0 var(--char-step);width:var(--char-step);height:48px;font:26px serif;padding:0;border:0;border-radius:6px;background:transparent;transition:opacity 650ms,color 650ms,background 650ms}
.assembly-word button.picked{background:#f4e5b0;color:#57461e;box-shadow:0 0 0 1px #c5ab65}
.assembly-word.used button:not(.picked){opacity:.26}
.assembly-word.used button:not(.picked):focus-visible{opacity:.85}
@media(hover:hover) and (pointer:fine){.assembly-word.used button:not(.picked):hover{opacity:.85}}
.assembly-word button:disabled.picked{opacity:1}
.assembly-word.used button:disabled:not(.picked){opacity:.26}
#assembly-cheat{display:block;margin:8px 0 0 auto;border:0;padding:5px 0;font-size:11px;color:#7b8577;text-decoration:underline;text-underline-offset:3px}
@media(max-width:680px){
 #assembly-pool{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
 .assembly-column{container-type:inline-size;--char-step:min(30px,calc(100cqw / 7));min-width:0;border-radius:40px 40px 10px 10px}
 .assembly-word button{font-size:clamp(16px,calc(100cqw / 7),22px)}
}


/* Bloom, then slide the board and carry each word directly to its final place. */
.assembly-transitioning #board,.assembly-board-exit{pointer-events:none}
.assembly-bloom{position:absolute;width:48%;height:auto;left:50%;top:50%;transform:translate(-50%,-50%);z-index:4;filter:drop-shadow(0 8px 12px #a352352b);pointer-events:none}
.assembly-board-exit{position:fixed!important;margin:0!important;z-index:4;pointer-events:none;overflow:hidden;background:var(--surface);border-radius:18px}
.assembly-moving .assembly-ribbon{z-index:5;transform-origin:top left;transition:none}
.assembly-round-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}
#assembly-back{border:0;color:var(--muted);font-size:12px;padding:6px 0}
#assembly-return{margin:14px 0;text-align:center}
#assembly-return p{font-size:12px;color:var(--muted)}

.exit-nodes,.exit-edges{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}

/* The solved poem becomes a keepsake: a still moon over a quiet sea. */
#assembly-screen.complete #assembly-pool,#assembly-screen.complete .assembly-instruction,#assembly-screen.complete .assembly-tip,#assembly-screen.complete #assembly-count{display:none}
#assembly-screen.complete #assembly-feedback{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);margin:0}
#assembly-finish{padding:0;background:none;margin:22px 0 10px;outline-offset:5px}
.finale-night{position:relative;min-height:550px;border-radius:140px 140px 14px 14px;background:linear-gradient(#102d39,#1a3c47 68%,#244b52);overflow:hidden;box-shadow:0 12px 32px #102d391a}
.finale-sky{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
#finale-poem{position:relative;display:flex;flex-direction:row-reverse;justify-content:center;gap:45px;padding-top:177px;color:#f8efd5;font:34px serif;text-shadow:0 2px 14px #efe5b520}
.finale-line{display:flex;flex-direction:column;gap:9px}
.finale-line span{display:block;width:40px;height:43px;line-height:43px;transform-origin:top left}
#assembly-finish #assembly-credit{position:relative;color:#c8d7cf;font-size:12px;letter-spacing:2px;margin:25px 0 0}
#assembly-finish .finale-dedication{font:15px serif;line-height:1.9;margin:24px 0;color:#526759}
.finale-actions{display:flex;gap:14px;justify-content:center;align-items:center}
.finale-arriving .finale-moon{animation:moon-rise 2800ms cubic-bezier(.22,.61,.36,1) both;transform-origin:350px 95px}
@keyframes moon-rise{from{transform:translateY(400px) scale(.6)}to{transform:translateY(0) scale(1)}}
@media(max-width:400px){.finale-night{border-radius:110px 110px 12px 12px}#finale-poem{gap:32px}.finale-actions{gap:4px}}

.finale-arriving .finale-night{overflow:visible}
.finale-sky{border-radius:inherit}
#assembly-finish:focus{outline:none}

/* 登高: the railing drops away as the view opens across mountains and river. */
.finale-sunset{display:none;position:absolute;inset:0;width:100%;height:100%;border-radius:inherit;pointer-events:none}
#assembly-screen[data-theme="tower"] .finale-sky{display:none}
#assembly-screen[data-theme="tower"] .finale-sunset{display:block}
#assembly-screen[data-theme="tower"] .finale-night{background:linear-gradient(#a76152,#f2c58e 58%,#dcac88)}
#assembly-screen[data-theme="tower"] #finale-poem{color:#482f2a;text-shadow:0 1px 8px #ffe9c180}
#assembly-screen[data-theme="tower"] #assembly-credit{color:#382c28;text-shadow:0 1px 4px #e6bea0}
#assembly-screen[data-theme="tower"] .assembly-column{background:linear-gradient(90deg,#f5ede2,#fff1d5 50%,#f5ede2);border-color:#e2cdb0}
#assembly-screen[data-theme="tower"] .assembly-word button.picked{background:#f6d69c;color:#604223;box-shadow:0 0 0 1px #bf9455}
.tower-railing{transform:translateY(190px)}
#assembly-screen[data-theme="tower"].finale-arriving .tower-railing{animation:tower-rise 3600ms cubic-bezier(.22,.61,.36,1) both}
#assembly-screen[data-theme="tower"].finale-arriving .sunset-distance{animation:distance-reveal 3600ms cubic-bezier(.22,.61,.36,1) both}
#assembly-screen[data-theme="tower"].finale-arriving .sunset-near{animation:valley-reveal 3600ms cubic-bezier(.22,.61,.36,1) both}
@keyframes tower-rise{from{transform:translateY(-105px)}to{transform:translateY(190px)}}
@keyframes distance-reveal{from{transform:translateY(38px)}to{transform:translateY(0)}}
@keyframes valley-reveal{from{transform:translateY(90px)}to{transform:translateY(0)}}

/* 春日来信: blossoms carried into a river meadow, with one passing breeze. */
.finale-spring{display:none;position:absolute;inset:0;width:100%;height:100%;border-radius:inherit;pointer-events:none}
#assembly-screen[data-theme="spring"] .finale-sky{display:none}
#assembly-screen[data-theme="spring"] .finale-spring{display:block}
#assembly-screen[data-theme="spring"] .finale-night{background:linear-gradient(#e8efda,#faf5d9 55%,#cfdfc3)}
#assembly-screen[data-theme="spring"] #finale-poem{color:#345642;text-shadow:0 1px 8px #fff8df90}
#assembly-screen[data-theme="spring"] #assembly-credit{color:#345642;text-shadow:0 1px 4px #f4f3dc}
#assembly-screen[data-theme="spring"] .assembly-column{background:linear-gradient(90deg,#edf2e6,#faf4e5 50%,#edf2e6);border-color:#cddabe}
#assembly-screen[data-theme="spring"] .assembly-word button.picked{background:#f2d9d9;color:#674347;box-shadow:0 0 0 1px #c78f97}
#assembly-screen[data-theme="spring"].finale-arriving .spring-flowers{animation:meadow-open 3200ms cubic-bezier(.22,.61,.36,1) both;transform-origin:350px 550px}
#assembly-screen[data-theme="spring"].finale-arriving .spring-grass{animation:meadow-breeze 4500ms ease-in-out both;transform-origin:350px 550px}
#assembly-screen[data-theme="spring"].finale-arriving .spring-swallows{animation:swallows-cross 4500ms cubic-bezier(.22,.61,.36,1) both}
#assembly-screen[data-theme="spring"].finale-arriving .spring-petals{animation:petals-drift 4500ms ease-out both}
@keyframes meadow-open{from{transform:scale(.3) translateY(45px)}to{transform:scale(1) translateY(0)}}
@keyframes meadow-breeze{0%,100%{transform:skewX(0)}35%{transform:skewX(-9deg)}70%{transform:skewX(3deg)}}
@keyframes swallows-cross{from{transform:translate(-320px,60px)}to{transform:translate(0,0)}}
@keyframes petals-drift{from{transform:translate(80px,-65px) rotate(-8deg)}to{transform:translate(0,0) rotate(0)}}
@media(max-width:680px){
 .game:not(.assembly-moving) .assembly-column{overflow:clip;overflow-clip-margin:3px}
}
#assembly-heading:focus{outline:none}

/* A quiet clock: only accepted assistance changes the attempt's classification. */
#race-panel{margin-top:12px;font-size:11px;color:var(--muted)}
.race-row{display:flex;align-items:center;gap:7px 12px;flex-wrap:wrap}
#race-time{font:500 16px ui-monospace,monospace;font-variant-numeric:tabular-nums;color:var(--ink);white-space:nowrap}
#race-status{font-size:10px}#race-best{margin-left:auto;font-size:10px}
#race-share{border:0;padding:3px 0;font-size:11px;color:var(--green);margin-left:auto}
#race-share-status{margin:0}#race-share-status:not(:empty){margin-top:7px}
#race-share-text{width:100%;min-height:95px;margin-top:8px;font:12px sans-serif;padding:8px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink)}
#stuck-offer{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:12px 0;padding:10px 12px;background:#edf2e6;border:1px solid #d6dfcb;border-radius:10px;font-size:12px}
#stuck-offer span{flex:1}#stuck-offer button{font-size:11px;padding:7px 9px}
#dismiss-stuck-hint{border:0;color:var(--muted)}
#stuck-clue{font-size:12px;line-height:1.7;padding:10px 12px;background:#f7f0d9;border-radius:8px;margin:12px 0}
.race-rules{font-size:12px;line-height:1.8;color:var(--muted)}

/* Hint offers float independently of the puzzle; appearing never moves a tile. */
#hint-overlay{position:fixed;z-index:30;bottom:max(16px,env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);width:calc(100% - 24px);max-width:400px;pointer-events:none}
#hint-overlay>div{pointer-events:auto;margin:0;box-shadow:0 5px 24px #283c3426}
#stuck-clue{display:flex;align-items:center;gap:12px;border:1px solid #e5dab9}
#stuck-clue-text{flex:1}
#dismiss-stuck-clue{flex:none;border:0;padding:6px 10px;font-size:20px;line-height:1;color:var(--muted)}

#tutorial-hand{position:absolute;z-index:4;pointer-events:none;user-select:none;transform:translate(0,14px) rotate(-22deg);transform-origin:17px 3px}
#tutorial-hand svg{display:block;filter:drop-shadow(0 2px 2px #283c3420);animation:tutorial-point 1800ms ease-in-out infinite}
@keyframes tutorial-point{0%,100%{transform:translateY(3px)}50%{transform:translateY(-1px)}}

/* The programmatically focused heading is a reading target, not a control. */
#level-title{color:var(--ink);-webkit-text-fill-color:var(--ink);-webkit-tap-highlight-color:transparent}
#level-title:focus{outline:none}

.entry.bonus::after{content:"额外";font-size:10px;color:var(--muted);margin-left:5px;border:1px solid var(--line);border-radius:4px;padding:1px 4px}

/* Keep the attempted phrase readable; a soft settling motion invites another try. */
#slots.rejected span{background:#f7e8df;color:#865e48;box-shadow:inset 0 0 0 1px #e5cbbb}
#slots.rejected{animation:phrase-retry 420ms ease-out}
#message.retry-message{color:#865e48}
@keyframes phrase-retry{from{transform:translateY(2px) scale(.97)}to{transform:translateY(0) scale(1)}}