:root{font:16px/1.5 system-ui,-apple-system,sans-serif;color:#16322d;background:#edf3ef;--accent:#17694f;--muted:#536b61}*{box-sizing:border-box}body{margin:0}header{display:flex;gap:12px;align-items:center;padding:18px 5%;background:white;border-bottom:1px solid #d8e4dc}.brand{color:var(--accent);font-size:22px;font-weight:750;text-decoration:none;margin-right:auto}.brand span{font-size:14px;font-weight:500;color:var(--muted);margin-left:12px}main{max-width:1450px;margin:auto;padding:32px 5%}h1{font-size:32px;letter-spacing:-.6px;margin-bottom:6px}h2{font-size:21px;margin:0 0 16px}h3{font-size:17px}.muted{color:var(--muted)}.panel{padding:26px;background:white;border:1px solid #d8e4dc;border-radius:18px;margin:24px 0}.narrow{max-width:500px;margin:48px auto}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:26px 0}.stat{background:white;border:1px solid #d8e4dc;border-radius:16px;padding:20px}.stat strong{font-size:30px;display:block;color:var(--accent)}.stat span{color:var(--muted)}nav{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}button{border:1px solid #c4d6cc;background:white;color:#174535;padding:11px 17px;border-radius:10px;font:inherit;font-weight:600;cursor:pointer;min-height:44px}button:hover{background:#eef7f1}button:disabled{opacity:.5;cursor:default}.primary,nav .selected{color:white;background:var(--accent);border-color:var(--accent)}.primary:hover{background:#12583f}.danger{color:#9e332c}input,textarea,select{font:inherit;padding:11px 13px;min-height:44px;border:1px solid #c4d6cc;border-radius:9px;background:white;max-width:100%;width:100%}input[type=checkbox]{width:20px;min-height:20px}label{display:block;margin:14px 0}label input,label textarea,label select{display:block;margin-top:6px}.inline{display:flex;align-items:center;gap:8px}.inline input{margin:0}form{display:flex;gap:12px;align-items:end;flex-wrap:wrap}form label{flex:1 1 300px}form label.inline{flex:0 1 auto}.section-head{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-bottom:12px}.section-head h2{margin:0;margin-right:auto}.section-head input[type=search]{width:300px}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;text-align:left;font-size:14px}th{color:var(--muted);font-weight:600}td,th{padding:13px 10px;border-bottom:1px solid #e2ebe5;vertical-align:top}td:first-child,th:first-child{padding-left:0}td:last-child{white-space:nowrap}.badge{display:inline-block;background:#e5f2eb;border-radius:6px;padding:3px 8px}.empty{color:var(--muted);padding:24px 0}#notice:not(:empty){padding:14px;background:#fff3d5;border-radius:10px;margin-bottom:16px}dialog{width:min(1100px,95vw);max-height:92vh;border:1px solid #d8e4dc;border-radius:18px;padding:28px;color:#16322d}dialog::backdrop{background:#122b2566}.answer{background:#f3f7f4;padding:14px;border-radius:10px;margin-bottom:12px;white-space:pre-wrap}.prompt{min-width:260px;max-width:460px;white-space:pre-wrap}.summary{display:flex;gap:24px;flex-wrap:wrap;margin:20px 0;color:var(--muted)}[hidden]{display:none!important}:focus-visible{outline:3px solid #76b398;outline-offset:3px}@media(max-width:750px){main{padding:20px 16px}.stats{grid-template-columns:repeat(2,1fr)}h1{font-size:26px}.brand span{display:none}.panel{padding:18px}.section-head input[type=search]{width:100%}dialog{padding:18px}}
#learning-form{display:grid;grid-template-columns:1fr;align-items:stretch;gap:16px}#learning-form label{margin:0}#learning-form textarea{resize:vertical;min-height:180px}#learning-sessions{font-family:ui-monospace,SFMono-Regular,monospace;min-height:360px}#learning-form button{justify-self:start}
/* Palette and panels shared visually with the iPad textbook-inspired theme. */
.preview-layout{display:grid;grid-template-columns:minmax(220px,300px) minmax(0,1fr);gap:24px;align-items:start}.preview-catalog{max-height:78vh;overflow:auto;position:sticky;top:20px;padding-right:8px}.preview-session{display:grid;grid-template-columns:32px 1fr;gap:8px;text-align:left;width:100%;margin:0 0 12px;padding:14px;background:#fffcf5;border-color:#d5ded8;color:#23383d;font-weight:600}.preview-session small{grid-column:2;font-weight:400;color:#50656a}.preview-session.selected{background:#e8f0ed;border-color:#086a7b;box-shadow:inset 0 0 0 1px #086a7b}.book-number{display:grid;place-items:center;width:32px;height:32px;border-radius:8px;background:#3e713f;color:white;font-variant-numeric:tabular-nums}.ipad-preview{background:#f8f5ec;border:1px solid #d5ded8;border-radius:22px;box-shadow:0 10px 35px #23383d18;overflow:hidden;color:#23383d;min-width:0}.ipad-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 24px;background:#fffcf5;border-bottom:1px solid #d5ded8;font-size:14px;color:#50656a}.ipad-toolbar strong{font-size:18px;color:#23383d}.ipad-page{padding:24px}.book-banner{padding:22px 24px;background:#086a7b;border-radius:12px;color:white;position:relative;margin-bottom:20px}.book-banner:after{content:"";position:absolute;bottom:0;left:24px;right:24px;height:5px;background:#b52f46}.book-banner h2{margin:0 0 5px;font-size:25px}.book-banner p{margin:0;color:#fff}.preview-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px;color:#50656a;margin:0 0 20px}.preview-meta .badge{background:#e8f0ed}.preview-panel{background:#fffcf5;border:1px solid #d5ded8;border-radius:12px;padding:22px;margin:16px 0}.preview-panel h3{margin:0 0 10px;color:#086a7b}.preview-panel ul{margin:0;padding-left:22px}.preview-panel li+li{margin-top:9px}.preview-text{white-space:pre-wrap;overflow-wrap:anywhere}.worked-example{background:#f5ecd9}.worked-example h3{color:#b52f46}.student-answer{background:#e8f0ed}.preview-stages{gap:8px;margin:20px 0}.preview-stages button{padding:8px 14px;color:#3e713f;border-color:#d5ded8}.preview-stages button.selected{background:#3e713f;color:white;border-color:#3e713f}.preview-voice{border:0;background:transparent;color:#086a7b;padding:8px 0;font-size:14px}.preview-navigation{display:flex;justify-content:space-between;gap:12px;margin:16px 0 24px}.preview-navigation button{color:#086a7b}.ipad-composer{display:flex;align-items:center;justify-content:space-between;gap:14px;background:#e8f0ed;border-top:1px solid #d5ded8;padding:18px 24px;font-size:14px;color:#50656a}.ipad-preview details{margin-top:22px}.ipad-preview summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-weight:600}.session-actions{display:flex;gap:8px;flex-wrap:wrap}.preview-expanded{position:fixed;inset:12px;z-index:5;margin:0;overflow:auto;box-shadow:0 0 0 30px #23383d66}.preview-expanded .ipad-preview{max-width:1200px;width:100%;justify-self:center}@media(max-width:1000px){.preview-layout{grid-template-columns:1fr}.preview-catalog{position:static;max-height:250px}.preview-catalog #preview-catalog{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.preview-session{margin-bottom:0}}@media(max-width:600px){.preview-catalog #preview-catalog{grid-template-columns:1fr}.ipad-page{padding:14px}.ipad-toolbar,.ipad-composer{padding:14px;flex-wrap:wrap}.preview-panel{padding:16px}.preview-navigation{flex-wrap:wrap}.preview-expanded{inset:4px;padding:12px}}