/* The lesson library: year first, then subject; cards named by their story. Tokens and fonts come from chrome.css. */
*{box-sizing:border-box}
body.library-page{margin:0;background:var(--q-paper);color:var(--q-ink);font:16px/1.6 var(--q-body)}
.library-page h1,.library-page h2,.library-page h3{font-family:var(--q-display);line-height:1.2;letter-spacing:-.025em;margin:0;text-wrap:balance}
.library-page p{margin:0}
.library-page a{color:inherit;text-decoration:none}
.library-page img{max-width:100%;display:block}
.library-page button,.library-page input,.library-page select{font:inherit}
.library-page .icon{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.library-page :focus-visible{outline:3px solid var(--q-blue);outline-offset:3px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;top:-80px;left:20px;z-index:100;background:#fff;padding:12px}.skip-link:focus{top:12px}
.library-main{width:100%;max-width:1180px;margin:0 auto;padding:28px 48px 64px}
.library-intro{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:28px}
.library-intro h1{font-size:34px}
.library-intro p{margin-top:10px;color:var(--q-muted);max-width:66ch;text-wrap:balance}
.pill{display:inline-flex;align-items:center;gap:7px;border-radius:50px;padding:5px 12px;font-size:12px;font-weight:500;background:var(--q-support);color:var(--q-blue);white-space:nowrap}
.pill.green{background:#e9f5ee;color:#12664f}
.filter-block{background:#fff;border-radius:16px;padding:18px 22px;margin:0 0 20px;display:flex;flex-direction:column;gap:14px;min-width:0}
.filter-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;min-width:0}
.filter-row .lab{width:70px;font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--q-muted);flex-shrink:0}
.filter-row .hint{font-size:13px;color:var(--q-muted);margin-left:6px}
.segs{display:inline-flex;background:#f0f2f6;border-radius:12px;padding:4px;gap:2px;max-width:100%;min-width:0;flex:0 1 auto;overflow-x:auto;scrollbar-width:none}
.segs button{border:0;background:transparent;padding:8px 14px;border-radius:9px;font-size:14px;font-weight:600;color:var(--q-muted);white-space:nowrap;cursor:pointer;min-height:40px}
.segs button[aria-pressed=true]{background:#fff;color:var(--q-ink);box-shadow:0 1px 2px rgba(11,21,56,.10)}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chips button{min-height:42px;border:1px solid var(--q-line);background:#fff;border-radius:24px;padding:8px 18px;font-size:14px;display:inline-flex;align-items:center;gap:8px;cursor:pointer;color:var(--q-ink)}
.chips button[aria-pressed=true]{background:var(--q-blue);color:#fff;border-color:var(--q-blue)}
.chips button:hover:not([aria-pressed=true]){background:var(--q-paper)}
.search{margin-left:auto;display:flex;align-items:center;gap:8px;min-height:42px;border:1px solid var(--q-line);border-radius:10px;padding:0 12px;color:var(--q-muted);font-size:13px;min-width:230px;background:#fff}
.search input{border:0;background:transparent;min-width:0;flex:1;font-size:14px;color:var(--q-ink);outline:none;min-height:40px}
.search input::placeholder{color:var(--q-muted)}
.result-line{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:0 0 16px;color:var(--q-muted);font-size:14px}
.result-line .q-select{height:34px}
.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.course-grid:has(.empty-state){grid-template-columns:1fr}
.empty-state{padding:34px 0;border-block:1px solid var(--q-line)}.empty-state h2{font-size:26px}.empty-state p{max-width:60ch;color:var(--q-muted);margin-top:8px}.empty-state button{margin-top:16px}
.compact-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:9px 18px;border:0;border-radius:12px;background:var(--q-blue);color:#fff;font-weight:600;cursor:pointer}
.course-card{background:#fff;border-radius:16px;overflow:hidden;display:flex;flex-direction:column;position:relative;min-width:0}
.course-card-media{position:relative;display:block;background:var(--q-ink);aspect-ratio:16/9;overflow:hidden}
.course-card-media img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s}
.course-card-media:hover img{transform:scale(1.03)}
.course-card .new{position:absolute;top:12px;left:12px;z-index:1}
.course-card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.course-card-body>span{font-size:12px;color:var(--q-muted)}
.course-card h3{font-size:19px}
.course-card p{font-size:14px;color:var(--q-muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.course-card footer{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid #e2e5eb;font-size:13px;color:var(--q-muted)}
.course-card footer a{display:inline-flex;align-items:center;gap:8px;color:var(--q-blue);font-weight:600}
.course-card footer img{width:34px;height:42px;object-fit:contain}
.all-editions{margin-top:56px}
.section-heading{margin-bottom:22px}.section-heading h2{font-size:28px}.section-heading p{font-size:15px;margin-top:6px;color:var(--q-muted)}
.edition-topic{border-top:1px solid var(--q-line);padding-top:20px;margin-top:20px}
.edition-topic>header{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.edition-topic>header img{width:54px;height:64px;object-fit:contain}
.edition-topic>header h3{font-size:20px}.edition-topic>header p{font-size:13px;color:var(--q-muted)}
.edition-track{display:grid;grid-template-columns:repeat(6,minmax(128px,1fr));gap:10px;padding:0 0 8px;overflow-x:auto}
.edition-link{display:flex;flex-direction:column;gap:4px;padding:12px 14px;border:1px solid var(--q-line);border-radius:12px;background:#fff;min-width:0}
.edition-link:hover{border-color:var(--q-blue)}
.edition-link[aria-current=true]{border-color:var(--q-blue);background:var(--q-support)}
.edition-link span{font-size:12px;font-weight:700;color:var(--q-blue)}
.edition-link strong{font-size:14px;line-height:1.35;font-weight:600}
.edition-link small{font-size:11px;color:var(--q-muted)}
.library-note{display:grid;grid-template-columns:100px 1fr;gap:26px;align-items:center;margin:56px 0 0;padding:32px;background:var(--q-support);border-radius:16px}
.library-note img{width:100px;height:128px;object-fit:contain}
.library-note h2{font-size:24px}.library-note p{font-size:15px;color:#46536b;margin-top:10px}
@media(max-width:1000px){.library-main{padding:24px 24px 48px}.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.edition-track{grid-template-columns:repeat(3,minmax(140px,1fr))}}
@media(max-width:700px){.library-main{padding:18px 16px 40px}.library-intro{display:block}.library-intro h1{font-size:28px}.library-intro p{font-size:14px}#new-count{display:none}.filter-block{padding:14px 16px}.filter-row .lab{width:auto}.filter-row .hint{display:none}.search{margin-left:0;width:100%}.course-grid{grid-template-columns:1fr;gap:14px}.result-line{flex-direction:column;align-items:flex-start;gap:8px}.library-note{grid-template-columns:1fr;text-align:center;justify-items:center;padding:24px}.edition-track{grid-template-columns:repeat(2,minmax(140px,1fr))}}
@media(prefers-reduced-motion:reduce){.course-card-media img{transition:none}}