.iso-player{--iso-accent:#477f91;width:100%;min-width:0;color:#294b50;font-family:'Songti SC',STSong,serif;outline:none;container-type:inline-size}
.iso-player *{box-sizing:border-box}.iso-player button{font:inherit;cursor:pointer;color:inherit;touch-action:manipulation;min-height:44px}
.iso-player button:focus-visible,.iso-player:focus-visible{outline:2px solid #477f91;outline-offset:4px}.iso-player ::selection{background:#b5ddd3;color:#233b3b}
.iso-chapters{display:flex;gap:8px;justify-content:center;margin:0 0 26px;flex-wrap:wrap}
.iso-chapter{border:0;background:transparent;padding:8px 18px;border-radius:4px;font-size:15px;line-height:1.4}
.iso-chapter[aria-pressed=true]{background:#e6eee6;color:#244e51}.iso-chapter:hover{background:#eef2e9}
.iso-title{font-size:clamp(21px,2.7vw,34px);font-weight:500;text-align:center;line-height:1.5;margin:0 0 25px;color:#294b50}
.iso-stage{display:grid;grid-template-columns:1fr 1fr;gap:20px}.iso-world{margin:0;min-width:0;background:#ffe4a0;border-radius:4px;overflow:hidden}
.iso-world.iso-ai{background:#b7dcee}.iso-world-label{font-size:16px;color:#365d56;line-height:1.4;padding:20px 24px 0}.iso-ai .iso-world-label{color:#2c5569}
.iso-art{aspect-ratio:640/460}.iso-art svg{width:100%;height:100%;display:block}
.iso-copy{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:14px 0 22px}.iso-copy p{margin:0;font-size:17px;line-height:1.7;color:#405e5e;padding:0 6px}
.iso-footer{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid #d9e1d9;padding:15px 0}
.iso-controls{display:flex;align-items:center;gap:12px}.iso-controls button{background:none;border:1px solid #c3d0c8;border-radius:4px;padding:8px 15px;white-space:nowrap;font-size:15px}
.iso-controls button:hover{background:#eef2e9}.iso-controls button:disabled{opacity:.4;cursor:default}.iso-controls .iso-next{background:#376c6a;color:white;border-color:#376c6a}.iso-controls .iso-next:hover{background:#295756}
.iso-count{font-size:13px;white-space:nowrap;font-variant-numeric:tabular-nums;color:#536b68;min-width:40px;text-align:center}
.iso-progress{display:flex;gap:2px;align-items:center;flex:1;max-width:330px}.iso-progress .iso-step{width:100%;min-width:5px;border:0;background:transparent;position:relative;padding:0;height:44px}
.iso-step:after{content:'';height:4px;position:absolute;left:1px;right:1px;top:20px;background:#d7e1d8;border-radius:1px}.iso-step.is-done:after{background:#a4beb4}.iso-step.is-current:after{background:var(--iso-accent);height:7px;top:18px}
.iso-note{color:#586b65;font-size:12px;line-height:1.6;margin:6px 0 0}.iso-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.iso-demo-page{margin:0;background:#fffdf7;color:#294b50}.iso-demo-shell{max-width:1320px;margin:auto;padding:35px 48px 24px}.iso-demo-top{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:28px}.iso-demo-top h1{font-size:20px;font-weight:400;margin:0}.iso-demo-top a{color:#4d6c66;font-size:13px;text-decoration:none;min-height:44px;display:flex;align-items:center}.iso-demo-top img{width:105px;height:auto}
.iso-demo-page .iso-title{font-size:34px}.iso-demo-page .iso-chapters{margin-bottom:22px}.iso-demo-page .iso-art{max-height:440px}
.image-stack.isometric-analogy-stack{display:block!important}.isometric-analogy-stack .iso-player{background:#fffdf7;padding:26px 24px 18px;margin-bottom:30px}.iso-reference{margin-top:25px}.iso-reference summary{cursor:pointer;min-height:44px;font-size:15px;line-height:44px;color:#4b625f}.iso-reference-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.iso-reference-grid img{display:block;width:100%}.iso-reference-grid figure{margin:0}.iso-reference-grid figcaption{font-size:12px;line-height:1.5;margin:8px 0}.iso-terms{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.iso-terms h3{font-size:18px;font-weight:500;margin:0 0 14px}.iso-terms table{width:100%;font-size:14px;line-height:1.7;border-collapse:collapse}.iso-terms td,.iso-terms th{text-align:left;padding:9px 5px;border-bottom:1px solid #ddd;vertical-align:top}.iso-terms th{font-weight:500}
@container (max-width:760px){.iso-footer{flex-direction:column;gap:0}.iso-progress{width:100%;max-width:none}.iso-controls{width:100%;justify-content:space-between;gap:6px}.iso-copy p{font-size:15px}.iso-title{font-size:23px}.iso-world-label{font-size:13px;padding:14px 15px 0}.iso-chapter{font-size:13px;padding:8px 10px}}
@media(max-width:700px){.iso-demo-shell{padding:20px 16px}.iso-demo-top{margin-bottom:17px;gap:12px}.iso-demo-top h1{font-size:16px}.iso-demo-top img{width:86px}.iso-demo-page .iso-title{font-size:24px}.iso-chapters{gap:3px;margin-bottom:16px}.iso-stage{gap:10px}.iso-copy{gap:10px}.iso-terms{grid-template-columns:1fr}.iso-reference-grid{grid-template-columns:repeat(2,1fr)}.isometric-analogy-stack .iso-player{padding:20px 12px}.iso-controls button{padding:8px 10px;font-size:13px}.iso-note{font-size:11px}}
@media(max-width:430px){.iso-stage{grid-template-columns:1fr}.iso-art{aspect-ratio:640/385;overflow:hidden}.iso-art svg{transform:translateY(-20px)}.iso-copy{grid-template-columns:1fr;gap:8px}.iso-copy p{padding:0}.iso-world-label{padding-top:12px}.iso-chapters{justify-content:space-between}.iso-chapter{padding:8px 6px;font-size:12px}.iso-title{margin-bottom:18px}.iso-world{position:relative}.iso-world-label{position:absolute;top:0;left:0;z-index:1}.iso-count{font-size:12px}}
@media(prefers-reduced-motion:reduce){.iso-player *{scroll-behavior:auto!important}}
.iso-demo-link{display:inline-block;margin:12px 0 20px;color:#8bc9cb;text-underline-offset:4px}