:root{--ink:#202339;--muted:#62677b;--mist:#f0f2f8;--peach:#ecebfa;--brown:#5552a3;--line:#dce0ec;font-family:"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:#f6f7fb;font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0}button,input,select{font:inherit}button{cursor:pointer;color:inherit}a{color:inherit;text-decoration:none}button:disabled{cursor:default;opacity:.48}:is(button,a,input,select,summary,canvas):focus-visible{outline:3px solid #5358c7;outline-offset:4px}[hidden]{display:none!important}.wrap{width:min(1200px,calc(100% - 80px));margin-inline:auto}.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;height:96px}.wordmark{font-size:27px;letter-spacing:-1.4px;font-weight:600;display:inline-flex;gap:6px;align-items:center}.wordmark span{font-size:34px;color:#7470b2}nav{display:flex;gap:34px;font-size:14px}nav a{padding:12px 0;color:var(--muted)}nav a:hover{color:var(--ink)}
.pill{border:1px solid #c9cede;border-radius:999px;background:linear-gradient(#fff,#f1f3f9);min-height:46px;padding:12px 23px;display:inline-flex;align-items:center;justify-content:center;gap:12px;font-size:14px;line-height:1.4;box-shadow:inset 0 1px 0 #fff,0 2px 3px #20233908;transition:box-shadow .18s,background .18s,transform .18s,border-color .18s}.pill:hover:not(:disabled){border-color:#a6acc5;box-shadow:inset 0 1px 0 #fff,0 5px 12px #20233914;transform:translateY(-1px)}.pill:active:not(:disabled){transform:translateY(1px);box-shadow:inset 0 2px 5px #20233916}.pill.dark,.pill.selected{border-color:#373a70;color:#fff;background:linear-gradient(155deg,#656bb4,#343753 55%,#23253b);box-shadow:inset 0 1px 0 #ffffff50,0 4px 8px #25294d1c,0 10px 22px #33366318}.pill.dark:hover:not(:disabled),.pill.selected:hover:not(:disabled){background:linear-gradient(155deg,#656eb3,#40446b 55%,#2e3152);box-shadow:inset 0 1px 0 #ffffff60,0 6px 12px #25294d22,0 14px 25px #33366320}.pill.small{padding:8px 17px;min-height:40px;font-size:12px}.text-link{background:none;border:0;padding:12px 0;font-size:13px;text-align:left;color:var(--muted)}.text-link:hover{color:#5358c7;text-decoration:underline;text-underline-offset:4px}.eyebrow{font-size:11px;line-height:1.7;margin:0 0 16px;color:var(--muted)}h1,h2{font-family:Georgia,"Times New Roman","Songti SC",SimSun,serif;font-weight:400;letter-spacing:-.045em;margin:0;line-height:1.06}h2{font-size:clamp(33px,4vw,48px)}p{line-height:1.65}.quiet{font-size:12px;line-height:1.7;color:var(--muted)}
.hero{position:relative;min-height:570px;padding:70px 0 100px;display:grid;place-items:center;text-align:center;isolation:isolate}.hero:before{content:"";position:absolute;inset:15px 50px 40px;background:radial-gradient(ellipse,#e5e7f475,transparent 65%);border-radius:50%;z-index:-1}.hero-copy{max-width:690px;z-index:1}.hero-mark{display:inline-block;color:#9995c3;font-size:38px;line-height:1;margin-bottom:25px}.hero h1{font-size:clamp(58px,6.2vw,81px)}.lede{font-size:16px;margin:24px auto 27px;color:var(--muted)}.hero-actions{display:flex;justify-content:center;gap:12px}.hero-note{display:flex;align-items:center;justify-content:center;gap:7px;margin-top:24px}.status-dot{width:5px;height:5px;border-radius:50%;background:#8b96b3}.hero-mini{position:absolute;text-align:left;width:215px;border:1px solid #fff;background:linear-gradient(160deg,#fff,#eceaf5);border-radius:32px;padding:10px;box-shadow:0 2px 3px #46466a07,0 14px 34px #45486a10;transition:transform .2s,box-shadow .2s}.hero-mini:hover{box-shadow:0 22px 44px #45486a20;transform:rotate(0) translateY(-5px)}.mini-art{display:block;overflow:hidden;border-radius:24px;background:#fff8}.mini-art svg{width:100%;display:block}.mini-caption{display:flex;align-items:center;justify-content:space-between;padding:14px 13px 9px;font-size:13px}.mini-go{display:grid;place-items:center;width:27px;height:27px;border:1px solid #c7c8dc;border-radius:50%;color:#55527b}.mini-left{left:-8px;top:120px;transform:rotate(-9deg)}.mini-right{right:-8px;top:220px;transform:rotate(8deg)}
.collection{padding:38px 0 76px;border-top:1px solid var(--line)}.section-head{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:28px}.count-chip{border:1px solid var(--line);background:#fff8;border-radius:999px;padding:8px 14px;color:var(--muted);font-size:12px;white-space:nowrap}.filters{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:30px 0}#filter-pills{display:flex;gap:8px;flex-wrap:wrap}.filters .pill{font-size:12px;min-height:40px;padding:9px 17px}.search{display:flex;align-items:center;gap:9px;background:#fff9;border:1px solid var(--line);border-radius:999px;padding:8px 15px;width:215px}.search span{font-size:22px}.search input{width:100%;border:0;background:none;padding:4px 0;font-size:12px;min-width:0}.game-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:30px 20px}.game-tile{position:relative;min-width:0}.game-card{background:none;border:0;text-align:left;padding:0;width:100%;border-radius:23px}.thumb{height:192px;position:relative;background:linear-gradient(145deg,#fdfdff,#e9ebf5);border:1px solid #fff;border-radius:24px;overflow:hidden;box-shadow:inset 0 1px 0 #fff,0 3px 8px #20233904;transition:box-shadow .2s}.game-tile:nth-child(4n+2) .thumb{background:linear-gradient(145deg,#f8f5fa,#e6e0ee)}.game-tile:nth-child(4n+3) .thumb{background:linear-gradient(145deg,#f4f8f7,#e1ebe6)}.game-tile:nth-child(4n) .thumb{background:linear-gradient(145deg,#fff8f2,#f1e4db)}.game-card:hover .thumb{box-shadow:inset 0 1px 0 #fff,0 8px 22px #34365a14}.thumb svg{height:100%;width:100%;display:block;transition:transform .25s}.game-card:hover .thumb svg{transform:scale(1.045)}.thumb-no{position:absolute;left:15px;top:13px;font-size:10px;color:#646980}.thumb-go{position:absolute;bottom:13px;right:14px;background:linear-gradient(#fff,#eceef9);border:1px solid #bdc2d7;box-shadow:0 3px 7px #35355313;display:grid;place-items:center;width:32px;height:32px;border-radius:50%;font-size:17px;color:#4f5384}.favorite-toggle{position:absolute;right:10px;top:10px;width:35px;height:35px;border-radius:50%;border:1px solid #ffffffb0;background:#ffffffb8;color:#676188;display:grid;place-items:center;font-size:22px;z-index:2}.favorite-toggle[aria-pressed=true],.icon-pill[aria-pressed=true]{color:#68509d;background:#ede5fa;border-color:#bdaed5}.card-head{display:flex;align-items:baseline;justify-content:space-between;gap:7px;margin:14px 2px 0}.card-head h3{font:400 23px/1.2 Georgia,"Songti SC",serif;letter-spacing:-.6px;margin:0}.card-head span{font-size:10px;color:var(--muted);white-space:nowrap}.game-card p{font-size:12px;color:var(--muted);margin:7px 2px 0;line-height:1.6}.empty-state{padding:35px;border:1px dashed #c9cede;border-radius:24px;color:var(--muted);text-align:center}
.about{border-top:1px solid var(--line);padding:58px 0 70px;display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}.about>div:first-child{display:flex;align-items:center;gap:30px}.about-art{display:grid;place-items:center;width:118px;height:118px;border-radius:50%;background:radial-gradient(circle at 30% 25%,#fff,#ece9f4 55%,#ddd9ec);box-shadow:inset 0 1px 0 white,0 10px 20px #46446b0b;color:#8780b4;font-size:70px;flex-shrink:0}.about-copy>p:first-child{font-size:19px;margin:0 0 18px}.principles{display:flex;gap:10px;flex-wrap:wrap}.principles span{border:1px solid var(--line);border-radius:999px;padding:8px 13px;font-size:12px;background:#fff6}.support{background:linear-gradient(135deg,#eeedf7,#e5e6f5);border:1px solid #fff;border-radius:34px;padding:42px 50px;display:grid;grid-template-columns:1fr 1fr;gap:65px;margin-top:35px;margin-bottom:65px;overflow:hidden}.support-copy{position:relative;padding-top:20px}.support-heart{font-size:60px;color:#9290bb;display:block;margin-bottom:20px}.support h2{font-size:48px}.support p{font-size:14px;color:var(--muted)}.support .quiet{font-size:12px}.support form{padding:25px;border:1px solid #fff;border-radius:24px;background:#ffffffb0}.amounts{display:flex;gap:7px;margin-bottom:20px}.amounts .pill{flex:1;padding:10px 8px}.support label{font-size:12px;display:block;line-height:1.6}.support input[type=text]{border:1px solid #bfc2d5;border-radius:12px;background:white;min-height:44px;padding:12px;width:100%;display:block;margin-top:8px}.identity{padding:0;border:0;display:flex;gap:22px;margin:20px 0}.identity legend{font-size:12px;margin-bottom:12px}.identity label,.support .join{display:flex;gap:8px;align-items:flex-start}.support .join{margin:20px 0}.support input:is([type=checkbox],[type=radio]){width:17px;height:17px;margin:0;accent-color:#5358c7;flex-shrink:0}.error{font-size:12px;color:#a12c20}.error:empty{display:none}.thanks,.favorites{padding-bottom:55px}.thanks h2,.favorites h2,.faq h2{font-size:36px}.board-row{display:grid;grid-template-columns:36px 1fr auto;gap:15px;padding:16px 0;border-bottom:1px solid var(--line);font-size:14px}.board-row>span:first-child{color:var(--muted)}.saved-games{display:flex;flex-wrap:wrap;gap:12px}.saved-game{background:#fff9;border:1px solid var(--line);border-radius:20px;padding:0 18px 0 0;display:flex;align-items:center;gap:10px;min-height:85px;font-size:14px;text-align:left}.saved-game svg{width:115px;height:78px;flex-shrink:0}.board-empty{border-radius:24px;border:1px dashed #c9cede;padding:28px;text-align:center;color:var(--muted);font-size:14px;width:100%}.faq{padding:32px 0 56px;border-top:1px solid var(--line)}.faq h2{margin-bottom:18px}details{border-bottom:1px solid var(--line);padding:17px 0}summary{cursor:pointer;line-height:1.6;font-size:14px}details p{font-size:13px;color:var(--muted);line-height:1.75;max-width:640px}footer{border-top:1px solid var(--line);display:flex;align-items:center;gap:20px;justify-content:space-between;padding:27px 0 32px}footer p,footer>span{font-size:12px;color:var(--muted)}
.player{padding:18px 0 35px}.player-header{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:20px 0 30px}.player-header h1{font-size:49px}.player-header .eyebrow{margin-bottom:10px}.player-actions{display:flex;gap:8px;flex-wrap:wrap}.player-actions .pill{padding:10px 18px;font-size:12px}.player-actions .icon-pill{font-size:24px;min-width:46px;padding:6px 10px}.game-layout{display:grid;grid-template-columns:minmax(0,2.6fr) minmax(230px,1fr);gap:30px;align-items:start}.stage-wrap{min-width:0}#stage{position:relative;border-radius:28px;overflow:hidden;background:var(--mist);width:100%;border:1px solid #fff;box-shadow:0 2px 4px #20233905,0 15px 38px #3538580a}canvas{display:block;width:100%;height:auto;aspect-ratio:800/520;touch-action:none;cursor:crosshair}#pause-overlay{position:absolute;inset:0;background:#f6f7fbec;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:25px;backdrop-filter:blur(6px)}#pause-overlay>span{font-size:55px;color:#797b9c}.stage-caption{display:flex;gap:12px;justify-content:space-between;font-size:12px;color:var(--muted);padding:15px 4px;min-height:50px}#game-status{color:var(--ink)}#motion-note{white-space:nowrap;font-size:11px}.game-panel{padding:20px;border-radius:24px;background:#ffffffb0;border:1px solid #e6e8f1}.game-description{font:22px/1.3 Georgia,"Songti SC",serif;margin:0 0 16px}.game-panel ol{padding-left:18px;font-size:12px;color:var(--muted);line-height:1.7;margin-bottom:20px}.game-panel li{padding-left:2px;margin-bottom:7px}#game-controls{border:0;padding:0;margin:0;min-width:0}#controls{display:flex;flex-direction:column;gap:12px}.control-row{display:flex;gap:8px;flex-wrap:wrap}.control-row .pill{padding:9px 12px;min-height:42px;font-size:12px}.control-label{font-size:12px;color:var(--muted);display:flex;flex-direction:column;gap:8px}.control-label input[type=range]{width:100%;accent-color:#5358c7;min-height:26px}.control-label select{border:1px solid #c9cede;border-radius:12px;background:white;min-height:42px;padding:8px;max-width:100%}.result{padding:16px;border-radius:16px;background:#e9e6f6;color:#484375;font-size:13px;line-height:1.6;margin-top:18px}.next-room{display:flex;justify-content:space-between;align-items:center;margin-top:20px;padding:23px 0;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}.swatch{min-width:42px!important;padding:9px!important;border-width:2px!important}.swatch[aria-pressed=true]{outline:2px solid var(--ink);outline-offset:2px}.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip{position:fixed;left:12px;top:-100px;background:var(--ink);color:white;z-index:100;padding:12px;border-radius:10px}.skip:focus{top:12px}.player h1:focus{outline:none}
@media(max-width:1150px){.wrap{width:calc(100% - 48px)}.hero-mini{width:175px}.mini-left{left:0;top:155px}.mini-right{right:0;top:270px}.hero h1{font-size:69px}.game-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.thumb{height:205px}.support{padding:35px;gap:35px}.about{gap:30px}.about-art{width:96px;height:96px;font-size:57px}.game-layout{gap:22px;grid-template-columns:minmax(0,2fr) minmax(230px,1fr)}}
@media(max-width:900px){.hero{padding:42px 0 95px;min-height:490px}.hero-mini{width:140px;border-radius:25px;padding:6px}.mini-caption{font-size:11px;padding:8px}.mini-go{width:22px;height:22px}.mini-left{top:225px;left:-4px}.mini-right{top:80px;right:-4px}.hero h1{font-size:61px}.hero-copy{max-width:550px}.hero-mark{font-size:30px}.game-layout{grid-template-columns:1fr}#controls{display:grid;grid-template-columns:1fr 1fr;gap:14px}.control-row{grid-column:1/-1}.about>div:first-child{gap:20px}.about h2{font-size:40px}}
@media(max-width:700px){.wrap{width:calc(100% - 36px)}.nav{height:78px}.nav nav{display:none}.wordmark{font-size:24px}.hero{padding:30px 0 205px;min-height:575px}.hero h1{font-size:clamp(45px,10.3vw,66px)}.hero-mark{margin-bottom:18px}.lede{font-size:14px;margin:20px auto 23px}.hero-actions{gap:8px}.hero-actions .pill{font-size:12px;padding:12px 17px}.hero-note{font-size:11px;margin-top:21px}.hero-mini{width:145px;padding:7px;border-radius:25px}.mini-left{top:auto;bottom:48px;left:calc(50% - 151px);transform:rotate(-7deg)}.mini-right{top:auto;bottom:20px;right:calc(50% - 151px);transform:rotate(7deg)}.mini-art svg{height:115px}.mini-caption{font-size:11px;padding:8px 9px 4px}.collection{padding:28px 0 50px}.section-head{gap:12px;align-items:start}.section-head h2{font-size:32px}.count-chip{font-size:10px;padding:7px 10px}.filters{display:block;margin:24px 0}.filters .pill{padding:9px 13px;font-size:11px}.search{width:100%;margin-top:17px}.game-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:25px 13px}.thumb{height:153px;border-radius:21px}.thumb-no{left:11px;top:11px;font-size:9px}.thumb-go{width:27px;height:27px;bottom:11px;right:11px;font-size:15px}.favorite-toggle{width:31px;height:31px;right:8px;top:8px;font-size:21px}.card-head{display:block;margin-top:12px}.card-head h3{font-size:22px;letter-spacing:-.7px}.card-head span{display:none}.game-card p{font-size:11px;margin-top:5px}.about{padding:40px 0;grid-template-columns:1fr;gap:25px}.about-art{width:90px;height:90px;font-size:54px}.about h2{font-size:42px}.support{padding:25px;grid-template-columns:1fr;gap:20px;margin-top:20px;margin-bottom:43px;border-radius:28px}.support h2{font-size:39px}.support-heart{font-size:45px;margin-bottom:15px}.support form{padding:20px;margin:0 -5px}.support-copy{padding-top:0}.thanks h2,.favorites h2,.faq h2{font-size:32px}.thanks,.favorites{padding-bottom:40px}.saved-game{width:100%;min-height:75px}.board-empty{padding:24px}.faq{padding:27px 0 40px}footer{flex-wrap:wrap;gap:12px}footer p{margin:0}footer>span{width:100%;font-size:10px}.player{padding:12px 0 25px}.player-header{display:block;margin:18px 0 20px}.player-header h1{font-size:39px}.player-actions{margin-top:20px;gap:7px}.player-actions .pill{min-height:42px;padding:9px 15px}.player-actions .icon-pill{min-width:42px;padding:5px 9px}#stage{border-radius:22px}.stage-caption{font-size:11px;padding:12px 0;flex-wrap:wrap;gap:5px}#motion-note{font-size:10px}.game-panel{padding:18px}.game-description{font-size:23px}.control-row .pill{font-size:12px;min-height:44px}.next-room{gap:12px;margin-top:24px}.next-room .pill{font-size:12px}.principles span{font-size:11px}}
@media(max-width:360px){.wrap{width:calc(100% - 28px)}.hero h1{font-size:43px}.hero-actions .pill{padding:12px 13px;font-size:11px}.hero-mini{width:133px}.mini-left{left:calc(50% - 135px)}.mini-right{right:calc(50% - 135px)}.thumb{height:135px}.card-head h3{font-size:20px}.player-actions .pill{padding:9px 12px}.section-head h2{font-size:28px}.game-panel{padding:15px}#controls{grid-template-columns:1fr}.control-row{grid-column:auto}.amounts .pill{font-size:12px}}
.thumb .starwind-cover{display:block;width:100%;height:100%;object-fit:cover;object-position:center;transition:transform .25s}.game-card:hover .starwind-cover{transform:scale(1.045)}.game-card[data-game="fc-starwind"] .thumb-no{color:#f4faff;background:#071426cc;border:1px solid #cce7ff40;border-radius:999px;padding:5px 8px}.game-card[data-game="fc-starwind"]+.favorite-toggle{color:#fff;background:#071426cc;border-color:#cce7ff40}
.thumb .alloy-cover{display:block;width:100%;height:100%;object-fit:cover;object-position:center;transition:transform .25s}.game-card:hover .alloy-cover{transform:scale(1.045)}.game-card[data-game="fc-alloy"] .thumb-no{color:#f4faff;background:#071426cc;border:1px solid #cce7ff40;border-radius:999px;padding:5px 8px}.game-card[data-game="fc-alloy"]+.favorite-toggle{color:#fff;background:#071426cc;border-color:#cce7ff40}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
@media(min-width:701px) and (max-width:1000px){.hero{padding:38px 0 210px;min-height:620px}.hero-mini{width:158px}.mini-left{top:auto;bottom:44px;left:calc(50% - 176px)}.mini-right{top:auto;bottom:22px;right:calc(50% - 176px)}.mini-art svg{height:123px}.mini-caption{padding:9px;font-size:11px}}
/* Illustrated mouse collection: keep material art behind the readable rule diagram. */
.mouse-art-thumb{position:absolute;inset:0;overflow:hidden;background:radial-gradient(ellipse at 74% 42%,#e9e2f4 0,transparent 65%),linear-gradient(135deg,#f5fbfb,#edf0f9)}
.mouse-art-diagram{position:absolute;inset:0;opacity:.78;transform:translateX(-12%);pointer-events:none}
.mouse-art-thumb>img{position:absolute;right:8%;top:14%;width:42%;height:72%;object-fit:contain;filter:drop-shadow(0 8px 5px #28374a18);pointer-events:none}
.game-card:hover .mouse-art-thumb>img{filter:drop-shadow(0 10px 8px #28374a30)}
.pill{transition:background-color .12s ease,box-shadow .12s ease,border-color .12s ease}
.pill:hover:not(:disabled){box-shadow:0 4px 12px #31385420}
.pill:active:not(:disabled){box-shadow:inset 0 2px 5px #31385435}
.pill:focus-visible{outline:3px solid #6152a4;outline-offset:3px}
.pill:disabled{cursor:default}
#game-canvas[data-pointer-pressed="true"]{outline:2px solid #7564b9;outline-offset:-2px}
.pill[data-purpose="destructive"]{color:#805360;font-size:.85em;background:transparent;border-color:#e2d9e0;box-shadow:none}
.discovery-target{font-weight:600;color:#343357;line-height:1.7}
@media(prefers-reduced-motion:reduce){.pill,.mouse-art-thumb>img{transition:none}}