[hidden]{display:none!important}
.credential-modal{border-top:6px solid var(--teal)}.credential-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}.credential-value{border:1px solid #bcd7ce;background:#edf8f4;border-radius:10px;padding:13px}.credential-value span{display:block;color:#506777;font-size:10px;font-weight:900;letter-spacing:.6px;text-transform:uppercase}.credential-value strong{display:block;color:var(--navy);font-size:20px;margin-top:5px;word-break:break-word}.credential-buttons{display:flex;gap:9px;flex-wrap:wrap;margin-top:15px}.credential-private{margin:13px 0 0;color:var(--danger);font-size:11px;font-weight:800;line-height:1.45}@media(max-width:520px){.credential-grid{grid-template-columns:1fr}.credential-buttons{display:grid}.credential-buttons .btn{width:100%}}
:root{--navy:#123d5f;--navy2:#0c2f4b;--teal:#0e7b61;--gold:#efb91f;--ink:#18364d;--muted:#687a88;--line:#d8e2e8;--bg:#f3f6f8;--white:#fff;--danger:#a73f37;--radius:14px;font-family:Inter,Arial,Helvetica,sans-serif;color:var(--ink)}*{box-sizing:border-box}body{margin:0;background:var(--bg);min-height:100vh}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;z-index:9999;background:#fff;padding:10px}.topbar{background:var(--navy2);color:#fff;border-bottom:4px solid var(--gold)}.topbar-inner{max-width:1500px;margin:auto;min-height:72px;padding:12px 22px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{font-size:12px;font-weight:900;letter-spacing:.7px;color:#f7c84b}.product{font-size:18px;font-weight:900;margin-top:3px}.top-actions{display:flex;gap:9px;flex-wrap:wrap}.top-link{border:1px solid rgba(255,255,255,.38);border-radius:9px;padding:9px 12px;color:#fff;text-decoration:none;font-weight:800;font-size:12px;background:transparent}.button-link{cursor:pointer}.shell{max-width:1500px;margin:auto;display:grid;grid-template-columns:245px 1fr;min-height:calc(100vh - 76px)}.sidebar{background:#fff;border-right:1px solid var(--line);padding:18px 14px}.account-card{display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--line);padding:4px 4px 16px;margin-bottom:12px}.avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--navy);color:#fff;font-weight:900}.account-label{font-size:9px;text-transform:uppercase;font-weight:900;color:var(--muted)}.account-name{font-size:13px;font-weight:900}.nav{display:grid;gap:5px}.nav-item{width:100%;border:0;border-radius:9px;background:transparent;color:var(--ink);font-weight:800;text-align:left;padding:11px 12px;cursor:pointer}.nav-item:hover,.nav-item:focus-visible{background:#eef5f7}.nav-item.active{background:var(--navy);color:#fff}.sidebar-note{margin-top:22px;border-radius:11px;padding:12px;background:#fff7dc;border:1px solid #e8ce70;display:grid;gap:5px;font-size:11px;line-height:1.4}.main{padding:24px;min-width:0}.page-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:14px}.eyebrow{margin:0 0 5px;color:var(--teal);font-size:10px;letter-spacing:.7px;font-weight:900}.page-head h1{font-size:28px;margin:0}.page-sub{margin:6px 0 0;color:var(--muted);font-size:13px}.primary-action,.btn{border:0;border-radius:9px;padding:10px 13px;font-weight:900;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:5px}.primary-action,.btn-primary{background:var(--teal);color:#fff}.btn-secondary{background:#edf3f6;color:var(--ink);border:1px solid var(--line)}.btn-gold{background:var(--gold);color:#17354b}.btn-danger{background:#fff0ee;color:var(--danger);border:1px solid #e6b7b0}.btn:disabled{cursor:not-allowed;opacity:.55}.notice{display:none;margin:0 0 14px;border-radius:10px;padding:11px 13px;font-size:12px;font-weight:800}.notice.ok{display:block;background:#e8f7f0;border:1px solid #a5d8c5;color:#17684f}.notice.error{display:block;background:#fff0ee;border:1px solid #e6b7b0;color:#8b3932}.loading-card,.panel,.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 2px 8px rgba(19,56,82,.05)}.loading-card{padding:24px}.panel{padding:16px}.stack{display:grid;gap:14px}.grid{display:grid;gap:14px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.stat{padding:15px}.stat-label{font-size:10px;text-transform:uppercase;color:var(--muted);font-weight:900}.stat-value{font-size:28px;font-weight:950;margin-top:3px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.section-head h2,.section-head h3{margin:0;font-size:17px}.section-head p{margin:4px 0 0;color:var(--muted);font-size:11px}.list{display:grid;gap:9px}.row{border:1px solid var(--line);border-radius:11px;padding:12px;display:flex;align-items:center;justify-content:space-between;gap:12px;background:#fff}.row-main{min-width:0}.row-title{font-size:13px;font-weight:900}.row-meta{color:var(--muted);font-size:11px;margin-top:4px;line-height:1.35}.row-actions{display:flex;align-items:center;gap:7px;flex-wrap:wrap;justify-content:flex-end}.badge{display:inline-flex;align-items:center;gap:4px;border-radius:999px;background:#e9f4f1;color:#0d6c55;font-size:10px;font-weight:900;padding:5px 8px}.badge.gray{background:#edf1f3;color:#65737e}.badge.gold{background:#fff4cb;color:#725500}.badge.blue{background:#e8f0fa;color:#285681}.filterbar{display:flex;gap:9px;align-items:flex-end;flex-wrap:wrap;margin-bottom:12px}.field{display:grid;gap:5px;min-width:160px;flex:1}.field label,.control-field>span{font-size:10px;text-transform:uppercase;font-weight:900;color:#506777}.field input,.field select,.control-field select,.control-field input[type="text"],.control-field input[type="number"]{width:100%;border:1px solid #b9cad5;border-radius:8px;background:#fff;padding:9px 10px;font:inherit;color:var(--ink)}.check-list{display:grid;gap:7px}.check-row{display:flex;gap:9px;align-items:flex-start;border:1px solid var(--line);border-radius:9px;padding:9px}.check-row input{margin-top:2px;accent-color:var(--teal)}.check-row strong{font-size:12px}.check-row small{display:block;color:var(--muted);margin-top:2px;line-height:1.35}.group-card{padding:14px}.group-members{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}.control-layout{display:grid;grid-template-columns:minmax(240px,.72fr) minmax(420px,1.5fr);gap:15px}.scope-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.scope-btn{border:1px solid #bacbd5;border-radius:9px;padding:11px 9px;background:#fff;font-weight:900;color:var(--ink);cursor:pointer}.scope-btn.active{background:var(--navy);border-color:var(--navy);color:#fff}.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.control-field{display:grid;gap:5px}.mode-choice{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-bottom:12px}.mode-choice label{border:1px solid var(--line);border-radius:10px;padding:10px;display:flex;align-items:flex-start;gap:8px;cursor:pointer}.mode-choice input{margin-top:2px;accent-color:var(--teal)}.mode-choice strong{font-size:12px}.mode-choice small{display:block;color:var(--muted);margin-top:3px}.effective-table{width:100%;border-collapse:collapse;font-size:11px}.effective-table th,.effective-table td{padding:9px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.effective-table th{font-size:9px;text-transform:uppercase;color:var(--muted)}.progress-track{height:8px;border-radius:99px;background:#e6edf1;overflow:hidden;margin-top:6px;min-width:110px}.progress-fill{height:100%;background:var(--teal)}.danger-text{color:var(--danger);font-weight:800}.muted{color:var(--muted)}.empty{padding:22px;text-align:center;color:var(--muted);border:1px dashed #c9d5dc;border-radius:10px}.modal-backdrop[hidden]{display:none}.modal-backdrop{position:fixed;inset:0;z-index:4000;background:rgba(6,30,48,.63);display:grid;place-items:center;padding:20px}.modal{width:min(520px,96vw);background:#fff;border-radius:16px;padding:22px;position:relative;box-shadow:0 24px 70px rgba(0,0,0,.25)}.modal h2{margin:3px 0 6px}.modal-copy{font-size:12px;color:var(--muted)}.modal-close{position:absolute;right:12px;top:10px;border:0;background:transparent;font-size:26px;cursor:pointer}.modal-form{display:grid;gap:8px;margin-top:16px}.modal-form label{font-size:11px;font-weight:900}.modal-form input{border:1px solid #bacbd5;border-radius:9px;padding:11px;font:inherit}
@media(max-width:1050px){.shell{grid-template-columns:190px 1fr}.grid-4,.scope-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.control-layout{grid-template-columns:1fr}}
@media(max-width:760px){.topbar-inner,.page-head{flex-direction:column}.shell{display:block}.sidebar{border-right:0;border-bottom:1px solid var(--line)}.nav{grid-template-columns:repeat(2,minmax(0,1fr))}.main{padding:16px}.grid-2,.grid-3,.grid-4,.settings-grid,.mode-choice{grid-template-columns:1fr}.row{align-items:flex-start;flex-direction:column}.row-actions{justify-content:flex-start}.scope-grid{grid-template-columns:1fr 1fr}}
.shop-panel{display:flex;align-items:center;justify-content:space-between;gap:16px;background:#fffaf0;border-color:#ead79a}.shop-panel h2{margin:0;font-size:17px}.shop-panel p{margin:5px 0 0;color:var(--muted);font-size:11px;line-height:1.4}.setup-pending{background:#fffaf0;border-color:#ead79a}@media(max-width:760px){.shop-panel{align-items:flex-start;flex-direction:column}}
/* V37.15 universal workbook release controls */
.release-settings{border:1px solid #c9d9e1;border-radius:12px;padding:13px;background:#f7fbfc;margin-bottom:12px}.compact-head{margin-bottom:10px}.control-field input[type="datetime-local"]{width:100%;border:1px solid #b9cad5;border-radius:8px;background:#fff;padding:9px 10px;font:inherit;color:var(--ink)}.control-field small{color:var(--muted);font-size:10px;line-height:1.4}.capability-note{margin-top:12px;border:1px solid #bcd7ce;background:#edf8f4;border-radius:10px;padding:11px 12px;color:#31594e;font-size:11px;line-height:1.45}.table-note{font-size:9px;color:var(--muted);margin-top:4px;white-space:nowrap}.row-title .badge{margin-left:6px;vertical-align:middle}

/* V43.4 parent/teacher status, history, and help */
.current-status-card{border:1px solid #bfd5df;background:#f5fafc;border-radius:10px;padding:10px 12px;font-size:12px;line-height:1.4}.history-table{min-width:1050px}.history-table td{max-width:280px}.help-hero{background:#f7fbfc;border-color:#bfd5df}.help-hero h2{margin:2px 0 6px}.help-hero p:last-child{margin:0;color:var(--muted);line-height:1.55}.help-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.help-grid article{border:1px solid var(--line);border-radius:10px;padding:12px;background:#fff}.help-grid h3{margin:0 0 5px;font-size:13px}.help-grid p{margin:0;color:var(--muted);font-size:11px;line-height:1.45}.faq-list{display:grid;gap:8px}.faq-list details{border:1px solid var(--line);border-radius:10px;padding:10px 12px;background:#fff}.faq-list summary{cursor:pointer;font-weight:900;font-size:12px}.faq-list p{color:var(--muted);font-size:11px;line-height:1.5;margin:8px 0 0}@media(max-width:900px){.help-grid{grid-template-columns:1fr}}

.ybb-catalog-cover{width:100px;height:135px;object-fit:contain;flex-shrink:0;background:#fff;border-radius:7px;box-shadow:0 3px 8px #12395422}.ybb-book>summary{display:flex;gap:18px;align-items:center}.ybb-book>summary>span:first-of-type{flex:1;min-width:0}.ybb-book h2{overflow-wrap:anywhere}.ybb-level-guide{align-self:start;grid-column:1/-1;max-width:650px}.ybb-level-guide summary{cursor:pointer;padding:8px;min-height:44px;box-sizing:border-box;font-weight:bold}.ybb-level-guide>div{padding:14px;border:1px solid #b8cad5;border-radius:10px;background:#f3f8fb;color:#123954}.ybb-level-guide table{width:100%;border-collapse:collapse;font-size:13px}.ybb-level-guide th,.ybb-level-guide td{padding:8px;text-align:left;vertical-align:top;border-bottom:1px solid #ccd7de}.ybb-level-guide summary:focus-visible{outline:3px solid #dba521}@media(max-width:600px){.ybb-book>summary{flex-wrap:wrap;gap:10px}.ybb-catalog-cover{width:72px;height:98px}.ybb-book>summary>.badge{flex-basis:100%}.ybb-book h2{font-size:18px}.ybb-level-guide th,.ybb-level-guide td{padding:5px}.ybb-level-guide>div{padding:8px}}

/* Bookshelf: card browsing and full-width assignment are separate. */
.ybb-age-tabs,.ybb-shelf-tools{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0}.ybb-age-tabs [aria-pressed=true]{background:#153954;color:white}.ybb-shelf-tools{justify-content:space-between}.ybb-bookshelf{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x proximity;padding:8px 4px 20px;max-width:100%;overscroll-behavior-x:contain}.ybb-shelf-card{flex:0 0 245px;box-sizing:border-box;display:flex;flex-direction:column;gap:10px;padding:18px;background:#fffdf7;border:1px solid #d2dbe1;border-radius:14px;scroll-snap-align:start;min-width:0}.ybb-shelf-card .ybb-catalog-cover{width:100%;height:245px;object-fit:contain;box-shadow:none}.ybb-shelf-card h3{font-size:18px;line-height:1.35;min-height:49px;margin:0;word-break:normal;overflow-wrap:break-word}.ybb-shelf-card p{margin:0;line-height:1.5;font-size:14px}.ybb-card-topic{min-height:63px}.ybb-card-assigned{flex:1}.ybb-shelf-card .btn{width:100%;min-height:44px;white-space:normal;word-break:normal}.ybb-bookshelf.view-all{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));overflow:visible}.ybb-assignment-panel{min-width:0}.ybb-assignment-panel .section-head{flex-wrap:wrap}.ybb-age-tabs .btn,.ybb-shelf-tools .btn{min-height:44px}@media(max-width:600px){.ybb-shelf-card{flex-basis:230px;padding:14px}.ybb-shelf-card .ybb-catalog-cover{height:230px}.ybb-bookshelf.view-all{grid-template-columns:1fr}.ybb-shelf-tools{gap:6px}.ybb-shelf-tools .btn{padding:10px;font-size:13px}}

.ybb-book-info{margin-block:12px}.ybb-book-info summary{cursor:pointer;background:#d5e9ee;color:#12394e;border-radius:10px;padding:12px;font-weight:700;min-height:44px}.ybb-book-info[open] div{animation:book-info-in .25s ease-out}.ybb-book-info a{display:block;margin-top:14px;overflow-wrap:anywhere}.ybb-coming-card .ybb-catalog-cover{filter:grayscale(.85);opacity:.65}.ybb-coming-card{background:#f1f3f3}@keyframes book-info-in{from{opacity:0;transform:rotateY(-12deg)}to{opacity:1;transform:none}}@media(prefers-reduced-motion:reduce){.ybb-book-info[open] div{animation:none}}

.ybb-shelf-card:has(.ybb-book-info[open])>.ybb-catalog-cover,.ybb-shelf-card:has(.ybb-book-info[open])>.ybb-card-topic{display:none}.ybb-book-info[open]{flex:1}.ybb-book-info h4{font-size:1.1rem}
.ybb-setup-tour{background:#fff4d3;border:2px solid #d7a324;border-radius:16px;padding:20px;margin:12px 0 24px;color:#12364b;scroll-margin-top:110px}.ybb-setup-tour h2{margin:4px 0 10px}.ybb-setup-tour>div{display:flex;flex-wrap:wrap;gap:10px}.ybb-setup-tour button{min-height:44px;padding:10px 18px;background:#126653;color:white;border:0;border-radius:8px;font:inherit;cursor:pointer}.ybb-setup-tour button:disabled{opacity:.5}.ybb-tour-target{outline:3px solid #d7a324;outline-offset:4px}@media(max-width:600px){.ybb-setup-tour{padding:14px}.ybb-setup-tour button{flex:1 1 40%}}