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66px)}.path-display{border-left:3px solid var(--accent);padding-left:15px;margin:20px 0}.path-display strong{display:block;font-size:1.1rem}.path-display p{font-size:.9rem;color:var(--muted);margin:8px 0}.skill-list{list-style:none;padding:0;margin:0}.skill-list li{padding:13px 0;border-bottom:1px solid #eef2f7;display:flex;justify-content:space-between;gap:8px;font-size:.87rem}.muted{color:var(--muted)}.small{font-size:.875rem}.section-gap{margin-top:24px}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.lesson-card{display:flex;flex-direction:column;min-height:225px}.lesson-card .actions{margin-top:auto;padding-top:16px}.lesson-card p{color:var(--muted);font-size:.92rem}.lesson-number{display:inline-block;font-size:1.8rem;font-family:Georgia,serif;color:#6b89b0;margin-bottom:18px}.lesson-block{margin:26px 0;padding-bottom:22px;border-bottom:1px solid var(--line)}.lesson-block p{white-space:pre-wrap;font-size:1.07rem;line-height:1.9}.topic-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}.topic-tabs button.selected{background:var(--blue);color:white}.question-list{display:grid;gap:10px}.question-row{display:flex;justify-content:space-between;align-items:center;text-align:left;gap:12px;background:white;border:1px solid var(--line);border-radius:12px;padding:15px;min-height:68px;color:#263b57}.question-row:hover{border-color:#567bb0}.question-row strong{display:block;font-size:.98rem}.question-row small{display:block;color:var(--muted);font-size:.8rem;margin-top:5px}.review-row{padding:18px 0;border-bottom:1px solid var(--line)}.review-row p{margin:8px 0;white-space:pre-wrap}.evidence{border-left:2px solid #adc4e3;margin-top:10px;padding-left:12px;font-size:.85rem}.evidence p{margin:5px 0}.empty{padding:36px 20px;text-align:center;color:var(--muted);line-height:1.8}.notice{padding:14px 18px;border:1px solid #d5e2f3;background:#edf4ff;border-radius:12px;margin-bottom:22px;font-size:.9rem;line-height:1.7}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#19334e;color:white;padding:13px 22px;border-radius:12px;max-width:min(90vw,650px);z-index:20;box-shadow:0 5px 25px #0002;line-height:1.5}dialog{border:1px solid var(--line);border-radius:20px;width:min(92vw,450px);padding:30px;color:#192d47}dialog::backdrop{background:#162d4b88}dialog p{color:var(--muted)}.skip{position:fixed;top:-100px;left:10px;background:white;padding:12px;z-index:30}.skip:focus{top:10px}.loading{padding:60px;color:var(--muted)}.answer-image{max-width:100%;border:1px solid var(--line);border-radius:10px}.progress-line{height:5px;background:#e6edf6;border-radius:10px;margin-top:15px;overflow:hidden}.progress-line span{display:block;width:33%;height:100%;background:var(--accent)}[hidden]{display:none!important}
@media(max-width:1100px){main{padding:26px 24px}.shell{grid-template-columns:190px 1fr}.sidebar{padding:24px 12px}.workspace{grid-template-columns:minmax(0,1.6fr) minmax(230px,1fr);gap:16px}.card{padding:22px}}
@media(max-width:850px){.topbar{padding:0 22px;height:86px}.shell{display:block}.sidebar{padding:10px 16px;border-right:0;border-bottom:1px solid var(--line)}.sidebar nav{display:flex;overflow-x:auto;gap:6px}.sidebar nav button{white-space:nowrap;padding:12px;gap:8px}.sidebar-note{display:none}.workspace{grid-template-columns:1fr}.page-heading{align-items:flex-start}.card+.card{margin-top:16px}}
@media(max-width:560px){.topbar{padding:12px 16px;height:auto;align-items:flex-start}.brand{font-size:1.05rem;gap:9px}.brand-mark{width:38px;height:38px}.brand small{font-size:.75rem;max-width:160px}.prototype-badge{font-size:.75rem;padding:5px 8px;white-space:normal;max-width:94px}main{padding:24px 16px 50px}.grid{grid-template-columns:1fr}.card{padding:20px}.question-text{font-size:1.1rem}h1{font-size:1.5rem}.page-heading{display:block}.page-heading>.pill{margin-top:12px}.sidebar nav button span{display:none}.scratch-full{inset:6px;padding:12px}.actions button{flex:1}.lesson-number{font-size:1.5rem}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
.learning-support{margin-top:24px;border:2px solid #cce4d7;background:#f8fcf5;border-radius:24px;overflow-wrap:anywhere}
.learning-support details{margin:12px 0;padding:14px 18px;background:white;border:1px solid #dce7de;border-radius:16px}
.learning-support summary{cursor:pointer;font-weight:700;line-height:1.6;padding:4px 0}
.learning-support .answer-image{display:block;max-width:100%;max-height:320px;object-fit:contain;background:white;border:1px solid #dce7de;border-radius:12px}
.learning-support .hint-output{white-space:pre-wrap;background:#edf5ed;padding:12px;border-radius:12px}
.learning-support .j-evidence{display:flex;gap:16px;align-items:center;flex-wrap:wrap;padding:16px;margin:12px 0;background:#fff5dd;border-radius:16px}
.learning-support .j-evidence>div{flex:1;min-width:200px}
.learning-support .j-actions{display:flex;gap:10px;flex-wrap:wrap}
.learning-support button,.learning-support select{white-space:normal;min-height:44px}
.learning-support .self-review{margin:18px 0;padding:14px 16px;border:1px solid #d8e6df;border-radius:12px;background:#f7fbf8}
.learning-support .self-review h4,.learning-support .self-review p{margin:0 0 8px}
.learning-support .self-review label{margin:10px 0 6px}
.learning-support .self-review-controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.learning-support .self-review-controls select{width:auto;min-width:min(100%,220px);flex:1}
.learning-support .handwriting-empty{padding:12px 0;border-top:1px solid #e4ece7}
.learning-support[aria-busy=true]{opacity:.85}
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.parent-unlock label{flex:1;min-width:180px}.parent-unlock input{min-height:44px}
.parent-review{padding:16px;border:2px solid #cddfcd;border-radius:14px;margin:16px 0;background:#f8fbf6}
.parent-review select,.parent-review textarea{width:100%;min-height:44px}.parent-review>label{display:block;margin:12px 0}
.parent-review fieldset{border:0;padding:12px 0;min-width:0}.parent-review [hidden]{display:none}
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.parent-review .parent-choice{display:flex;align-items:center;gap:10px;padding:10px 12px;min-height:48px;margin:0;border:1px solid #ccd9cc;border-radius:10px;background:white;cursor:pointer}
.parent-choice input{width:22px;height:22px;flex:0 0 22px;margin:0;accent-color:#176e58}.parent-choice:has(input:checked){border-color:#176e58;background:#e6f4e9}
.parent-feedback{border-left:4px solid #5c875f;padding:12px 16px;background:#f1f6ed;overflow-wrap:anywhere}
.practice-focus{padding:18px 22px;margin-bottom:20px;border:2px solid #d6e8d8;border-radius:20px;background:#f2f8ec;overflow-wrap:anywhere}
.practice-focus h2{margin:6px 0;font-size:1.15rem}.practice-focus p{margin:8px 0}.practice-focus small{color:#4f6258;line-height:1.6}