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.representation-extension{margin:34px 0;padding-top:30px;border-top:1px solid #d5e0e5}.extension-heading h3{margin:6px 0 18px;color:var(--navy);font-family:"Space Grotesk",sans-serif;font-size:26px}.representation-ladder{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.representation-ladder article{position:relative;padding:18px;border:1px solid #cfdae0;border-radius:13px;background:#f7fafc}.representation-ladder article:not(:last-child):after{content:"→";position:absolute;right:-13px;top:50%;z-index:2;display:grid;place-items:center;width:25px;height:25px;border-radius:50%;background:var(--gold);color:#173246;font-weight:800}.representation-ladder b{color:var(--teal);font-size:12px;letter-spacing:.06em}.representation-ladder p{margin:7px 0 0;color:#526b79}
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@media(max-width:620px){.intervention-layer{padding:14px 12px}.support-row{grid-template-columns:1fr}.support-row summary{align-items:flex-start;flex-direction:column}.accommodation-toolbar strong{width:100%}.accommodation-toolbar button,.accommodation-toolbar a{flex:1 1 calc(50% - 7px);text-align:center}.spiral-items,.fluency-grid{grid-template-columns:1fr}.worked-example>div{padding:16px}}
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.word-problem-studio{margin:34px 0 12px;padding:clamp(20px,4vw,34px);border:1px solid #cbdbe3;border-radius:20px;background:linear-gradient(145deg,#f8fcff,#eef8fd)}.word-problem-studio>header{max-width:780px}.word-problem-studio>header>span,.studio-heading>span,.structure-detail span,.structure-model>span{color:var(--teal);font-size:10px;font-weight:800;letter-spacing:.12em}.word-problem-studio>header h3{margin:7px 0;color:var(--navy);font-family:"Space Grotesk",sans-serif;font-size:clamp(25px,4vw,36px)}.word-problem-studio>header p,.studio-heading p{color:#607582}
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.structure-sort,.problem-organizer{margin-top:18px;padding:22px;border:1px solid #ccdbe2;border-radius:14px;background:#fff}.studio-heading h4{margin:5px 0;color:var(--navy);font-size:22px}.sort-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:16px 0}.sort-grid label{display:grid;gap:7px;padding:13px;border-radius:10px;background:#f5f9fb;color:#496270;font-size:13px;font-weight:700}.sort-grid select{width:100%;padding:9px;border:1px solid #c5d4dc;border-radius:8px;background:#fff;color:#405a69;font:inherit}.sort-grid select.correct{border-color:#269c72;background:#edf9f3}.sort-grid select.wrong{border-color:#cf5f74;background:#fff0f3}.sort-result{margin:10px 0 0;color:#405e6e;font-weight:800}.problem-organizer>div:last-of-type{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin:16px 0}.problem-organizer label{display:grid;gap:6px;padding:12px;border-top:4px solid var(--gold);background:#f5f9fb;color:var(--navy);font-size:13px}.problem-organizer textarea{min-height:78px;padding:9px;border:1px solid #c5d4dc;border-radius:7px;resize:vertical;font:inherit}
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