:root{font-family:'PingFang SC','Microsoft YaHei',sans-serif;color:#273B50;background:#F7F6F2;font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,a,input{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;border:0}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #6652B8;outline-offset:5px}a{color:inherit;text-decoration:none}button:disabled{cursor:wait;opacity:.55}.masthead{max-width:1440px;margin:auto;padding:26px 56px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #273b5020;font-size:11px;letter-spacing:1.4px}.masthead>a:first-child{font-size:20px;font-weight:850;letter-spacing:-.5px}.masthead a span{font-size:11px;font-weight:500;letter-spacing:2px;margin-left:15px}.game-link{padding:12px 18px;border:1px solid #273b5030;border-radius:30px}main{max-width:1328px;margin:auto;padding:0 40px}.intro{display:flex;justify-content:space-between;gap:50px;padding:58px 0 40px}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:650;color:#56687A}h1{font-size:clamp(36px,4.3vw,60px);letter-spacing:-2px;line-height:1.19;margin:18px 0 18px;font-weight:750}p{font-size:14px;line-height:1.85}.intro p{color:#56687A;margin:0}.intro-note{max-width:470px;align-self:flex-end;padding-bottom:7px}.intro-note>span{font-size:10px;letter-spacing:1.7px}.intro-note>p{margin:12px 0 18px}.theme-tabs{display:flex;flex-wrap:wrap;gap:8px}.theme-tabs button{display:flex;align-items:center;gap:8px;background:transparent;border:1px solid #273b5029;padding:11px 14px;border-radius:25px;color:#273B50;font-size:12px}.theme-tabs button[aria-pressed=true]{background:#273B50;color:white;border-color:#273B50}.theme-tabs i{width:13px;height:13px;border-radius:50%;box-shadow:inset 0 0 0 1px #273b5015}.studio{display:grid;grid-template-columns:1fr 390px 1fr;gap:36px;border-top:1px solid #273b5020;border-bottom:1px solid #273b5020;padding:42px 0;align-items:center}.theme-story h2,.motion-story h2{font-size:28px;letter-spacing:-1px;margin:15px 0}.theme-story>p,.motion-story>p{color:#56687A;font-size:13px}.color-spec{display:flex;align-items:center;gap:12px;margin:30px 0 26px;font-size:11px}.color-spec b{font-size:12px;font-weight:500}.color-spec i{height:30px;width:30px;border-radius:50%;border:1px solid #273b5020}.palette-title{font-size:12px;font-weight:600}.palette-title span{margin-left:8px;font-size:10px;color:#56687A}.local-palette{display:flex;gap:9px;margin:14px 0 22px}.local-palette span{width:34px;height:36px;clip-path:polygon(25% 7%,75% 7%,100% 50%,75% 93%,25% 93%,0 50%)}.small-note{font-size:11px!important;line-height:1.8;color:#56687A}.theme-story>a{display:inline-block;font-size:12px;border-bottom:1px solid #273b5055;padding-bottom:6px;margin-top:18px}.phone{width:390px;max-width:100%;background:var(--scene-bg);color:var(--scene-ink);border-radius:34px;padding:24px 12px 22px;box-shadow:0 18px 35px #273b5017,inset 0 0 0 1px #273b5012;transition:background .35s,color .35s}.phone-top{display:flex;align-items:center;justify-content:space-between;padding:0 10px}.phone-top>div{text-align:center}.phone-top strong{display:block;font-size:23px;letter-spacing:1px}.phone-top>div>span{display:block;font-size:10px;letter-spacing:1px;margin-top:6px}.icon-button{width:39px;height:39px;padding:10px;background:#52697E;border-radius:12px;color:white}.moves{text-align:center;margin-top:18px}.moves>span{display:block;font-size:11px}.moves>strong{display:block;font-size:30px;margin-top:4px}.phone canvas{display:block;width:100%;aspect-ratio:1;touch-action:none}.phone-status{height:34px;font-size:11px;text-align:center;display:flex;justify-content:center;align-items:center}.rotations{display:flex;justify-content:center;gap:84px;margin:4px 0 20px}.rotations button{display:flex;flex-direction:column;align-items:center;gap:6px;color:inherit;background:none;min-width:55px;min-height:64px}.rotations button>span{width:46px;height:46px;filter:drop-shadow(0 1px 1px #52697E)}.rotations b,.phone-tools b{font-size:11px;font-weight:550}.phone-tools{display:flex;justify-content:center;gap:34px}.phone-tools button{background:none;color:inherit;display:flex;flex-direction:column;align-items:center;gap:8px}.phone-tools button>span{width:44px;height:40px;background:#52697E;border-radius:11px;padding:10px}.art-icon{display:block;position:relative;overflow:hidden;width:100%;height:100%}.art-icon img{position:absolute;max-width:none;pointer-events:none}.motion-story ol{list-style:none;margin:24px 0 26px;padding:0}.motion-story li{display:flex;gap:14px;margin-bottom:24px}.motion-story li>b{font-size:10px;width:26px;height:26px;display:grid;place-items:center;border:1px solid #273b5030;border-radius:50%;flex-shrink:0}.motion-story li strong{display:block;font-size:13px;margin-bottom:5px}.motion-story li span{font-size:11px;color:#56687A;line-height:1.6}.demo-button{width:100%;background:#6652B8;color:white;border-radius:13px;padding:15px 18px;font-size:13px;display:flex;justify-content:space-between}.slow{display:flex;align-items:center;gap:6px;font-size:11px;margin-top:15px}.slow input{accent-color:#6652B8}.motion-status{font-size:11px!important;min-height:38px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:28px}.section-heading h2{font-size:29px;margin:12px 0 0;letter-spacing:-1px}.section-heading p{font-size:12px;color:#56687A;margin:0}.theme-collection,.pigment-section{padding:50px 0 0}.theme-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.theme-card{text-align:left;display:block;background:none;padding:0;color:#273B50}.mini-scene{background:var(--bg);color:var(--ink);border-radius:16px;padding:16px 8px 9px;box-shadow:inset 0 0 0 1px #273b5012}.mini-scene>span{display:block;text-align:center;font-size:10px;font-weight:600;letter-spacing:1px}.mini-scene canvas{display:block;width:100%;aspect-ratio:1}.theme-card>strong{display:block;margin:13px 0 6px;font-size:13px}.theme-card>small{font-size:10px;color:#56687A}.theme-card[aria-pressed=true] .mini-scene{outline:2px solid #6652B8;outline-offset:4px}.collection-note{font-size:11px;color:#56687A;margin-top:20px}.pigment-section{padding-bottom:45px}.pigment-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:12px}.pigment-item canvas{display:block;width:100%;aspect-ratio:1}.pigment-item strong,.pigment-item small{display:block;text-align:center}.pigment-item strong{font-size:11px;font-weight:500;margin-top:9px}.pigment-item small{font-size:9px;margin-top:5px;color:#56687A}.rules{margin-top:30px;padding-top:22px;border-top:1px solid #273b5020;display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.rules p{font-size:11px;color:#56687A;margin:0}.rules b{display:block;font-size:12px;margin-bottom:3px;color:#273B50}footer{max-width:1248px;margin:auto;padding:26px 0 30px;border-top:1px solid #273b5020;font-size:10px;display:flex;justify-content:space-between;gap:20px;color:#56687A;letter-spacing:.5px}@media(min-width:1350px){.studio{gap:60px}}@media(max-width:1050px){.studio{grid-template-columns:1fr 350px;gap:30px}.phone{width:350px;grid-column:2;grid-row:1 / 3}.motion-story{grid-column:1}.theme-story .small-note{display:none}.theme-story h2,.motion-story h2{font-size:24px}.motion-story ol{margin:16px 0}.motion-story li{margin-bottom:14px}.intro{gap:24px}.pigment-grid{grid-template-columns:repeat(6,1fr)}.pigment-item canvas{width:65px;margin:auto}.masthead{padding:22px 30px}footer{margin:0 40px}}@media(max-width:650px){main{padding:0 22px}.masthead{padding:20px 22px}.masthead>span,.masthead a span{display:none}.masthead>a:first-child{font-size:17px}.game-link{font-size:10px;padding:10px}.intro{display:block;padding:32px 0 26px}.intro h1{font-size:40px;line-height:1.15}.intro-note{margin-top:27px}.intro-note>span,.intro-note>p{display:none}.theme-tabs{gap:6px}.theme-tabs button{padding:9px 10px;font-size:11px}.studio{display:flex;flex-direction:column;gap:28px;padding:26px 0}.theme-story{width:100%}.theme-story h2{margin:10px 0}.theme-story>p{margin:8px 0}.color-spec{margin:14px 0}.palette-title,.local-palette,.theme-story>a{display:none}.phone{width:350px;order:1;border-radius:26px;padding-top:20px}.motion-story{order:2;width:100%}.section-heading{display:block}.section-heading p{margin-top:12px}.theme-grid{grid-template-columns:repeat(2,1fr);gap:24px 14px}.theme-grid>.theme-card:last-child{grid-column:1 / -1;max-width:190px}.theme-collection,.pigment-section{padding-top:34px}.pigment-grid{grid-template-columns:repeat(4,1fr);gap:20px 10px}.pigment-item canvas{width:100%}.rules{grid-template-columns:1fr;gap:14px}footer{margin:0 22px;flex-wrap:wrap;line-height:1.8}footer>span{display:none}}@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

.density-section{padding:12px 0 36px}.density-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.density-card[aria-pressed=true] .mini-scene{outline:2px solid #6652B8;outline-offset:4px}.local-palette{flex-wrap:wrap}.local-palette span{flex-shrink:0}@media(max-width:650px){.density-grid{grid-template-columns:repeat(2,1fr);gap:22px 14px}}
.board-zoom{display:flex;align-items:center;justify-content:center;gap:6px;padding:7px 0}.board-zoom button{min-width:36px;min-height:34px;border-radius:8px;background:#52697E;color:white;font-size:12px}.board-zoom span{font-size:9px}.board-size-control{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-bottom:20px;font-size:13px}.board-size-control select{padding:10px;font:inherit;border:1px solid #52697E;border-radius:8px;background:white;color:#273B50}.board-size-control>span{font-size:11px;color:#56687A}
/* Same board-first composition as the playable screen. */
.phone{height:844px;padding:8px;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));grid-template-rows:48px minmax(0,1fr) 60px;position:relative}
.phone-top,.phone .board-zoom{display:none}
.phone .moves{grid-row:1;grid-column:1/-1;margin:0;display:flex;align-items:center;justify-content:center;gap:8px}
.phone .moves>strong{margin:0;font-size:28px}
.phone canvas{grid-row:2;grid-column:1/-1;min-height:0;width:100%;height:100%;aspect-ratio:auto}
.phone .rotations,.phone .phone-tools{display:contents}
.phone .rotations button,.phone .phone-tools button{grid-row:3;min-width:0;min-height:44px;padding:4px 0;margin:0;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:4px}
.phone .rotations button>span{width:32px;height:32px}
.phone .phone-tools button>span{width:36px;height:32px;padding:7px;border-radius:9px}
.phone-status{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
@media(max-width:650px){.phone{height:min(844px,calc(100dvh - 24px));min-height:480px;width:100%}}
.phone{grid-template-columns:repeat(3,minmax(0,1fr));grid-template-rows:44px 40px minmax(0,1fr) 60px}
.phone-top{display:flex;grid-column:1/-1;grid-row:1;padding:0 6px;justify-content:space-between;align-items:center}
.phone-top>div>span{display:none}.phone-top strong{font-size:23px}
.phone .moves{grid-row:2}.phone canvas{grid-row:3}
.phone .phone-tools button{grid-row:4}
.phone .rotations{display:flex;position:absolute;bottom:78px;left:20px;right:20px;justify-content:space-around;gap:50px;margin:0;pointer-events:none;z-index:2}
.phone .rotations button{pointer-events:auto;min-width:80px;min-height:82px;gap:7px}
.phone .rotations button>span{width:56px;height:56px}.phone .rotations b{font-size:13px}
.study-dialog{width:min(360px,calc(100% - 32px));max-height:80dvh;overflow:auto;border:0;border-radius:24px;padding:24px;background:#F7F6F2;color:#273B50}
.study-dialog::backdrop{background:#273B507A;backdrop-filter:blur(5px)}.study-dialog h2{font-size:22px}.study-dialog button{min-height:44px;padding:10px 15px;border-radius:10px;background:#E4EAF0;color:#273B50}.study-levels{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:16px 0}.study-dialog label{display:block;margin:20px 0;font-size:14px}