.paper-library{max-width:1180px;color:var(--fg);margin:0 auto;padding:40px 32px 72px}.paper-library h1,.paper-library h2,.paper-library h3,.paper-library h4{font-family:var(--font-newsreader),Georgia,serif;letter-spacing:-.035em;font-weight:500}.library-hero{justify-content:space-between;align-items:center;gap:32px;margin-bottom:24px;display:flex}.library-eyebrow{letter-spacing:.15em;color:var(--muted);font-size:10px;font-weight:650}.library-hero h1{margin:12px 0;font-size:clamp(34px,4.3vw,52px);line-height:1.04}.library-hero>div>p:last-child{color:var(--muted);font-size:14px}.library-mascot{flex-shrink:0;width:112px;height:112px}.library-guide{border-top:1px solid var(--border-strong);border-bottom:1px solid var(--border-strong);grid-template-columns:repeat(3,1fr);gap:24px;padding:18px 0;display:grid}.library-guide p{color:var(--muted);gap:4px;font-size:12px;display:grid}.library-guide strong{color:var(--fg);font-weight:600}.library-controls{margin:26px 0 30px}.library-course-controls{gap:16px;display:flex}.library-controls label{color:var(--muted);flex-direction:column;gap:7px;font-size:11px;font-weight:600;display:flex}.library-course-controls label{flex:1;max-width:360px}.library-controls select{border:1px solid var(--border-strong);background:var(--card-warm);width:100%;min-width:140px;height:44px;color:var(--fg);border-radius:9px;padding:0 32px 0 13px;font-size:13px;font-weight:500}.library-filter-fields{align-items:end;gap:16px;margin-top:18px;display:flex}.library-kind-filter{border:0;margin:0;padding:0}.library-kind-filter legend{color:var(--muted);margin-bottom:7px;font-size:11px;font-weight:600}.library-kind-filter>div{background:var(--hover);border-radius:10px;gap:3px;padding:4px;display:flex}.library-kind-filter button{border-radius:7px;min-height:36px;padding:8px 13px;font-size:12px}.library-kind-filter button[aria-pressed=true]{background:var(--fg);color:var(--bg)}.library-reset{text-underline-offset:4px;padding:12px 0;font-size:12px;text-decoration:underline}.library-filter-toggle{display:none}.paper-library button,.paper-library a{touch-action:manipulation}.paper-library :is(button,a,select,summary):focus-visible{outline:2px solid var(--fg);outline-offset:4px}.library-subject-heading{justify-content:space-between;align-items:end;gap:16px;margin-bottom:24px;display:flex}.library-subject-heading h2{margin-top:7px;font-size:33px;line-height:1.1}.library-subject-heading>p{color:var(--muted);font-size:12px}.library-main-groups{gap:28px;display:grid}.library-main-groups[data-paired=true]{grid-template-columns:minmax(0,1.65fr) minmax(0,1fr)}.library-group-heading{margin-bottom:14px}.library-group-heading h3{font-size:23px;line-height:1.2}.library-group-heading p{color:var(--muted);margin-top:5px;font-size:12px;line-height:1.5}.library-featured{border:1px solid var(--border-strong);background:var(--card-warm);border-radius:17px;padding:25px}.library-card-top{justify-content:space-between;align-items:center;display:flex}.library-recommendation{background:var(--hover);letter-spacing:.04em;border-radius:4px;padding:4px 7px;font-size:10px;font-weight:650;display:inline-block}.library-access{color:var(--muted);border:1px solid var(--border-strong);white-space:nowrap;border-radius:20px;padding:3px 8px;font-size:10px}.library-featured h3{margin-top:17px;font-size:32px;line-height:1.12}.library-featured-description{color:var(--muted);margin-top:7px;font-size:13px}.library-stats{color:var(--muted);font-variant-numeric:tabular-nums;flex-wrap:wrap;gap:7px 16px;margin-top:12px;font-size:12px;display:flex}.library-history{color:var(--muted);margin-top:10px;font-size:12px}.library-paper-actions{flex-shrink:0;align-items:center;gap:16px;display:flex}.library-featured .library-paper-actions{margin-top:23px}.library-preview{text-underline-offset:4px;padding:12px 0;font-size:12px;text-decoration:underline}.library-launch .ppg-button,.library-continue{border:1px solid var(--border-strong);min-width:126px;color:var(--fg);min-height:42px;box-shadow:none;background:0 0;border-radius:30px;padding:10px 17px;font-size:12px}.library-continue{justify-content:center;align-items:center;gap:10px;display:inline-flex}.library-paper-actions[data-featured=true] .ppg-button,.library-paper-actions[data-featured=true] .library-continue{background:var(--fg);color:var(--bg);border-color:var(--fg)}.library-launch .ppg-button:hover,.library-continue:hover{box-shadow:0 3px 0 var(--border-strong);transform:translateY(-2px)}.library-source{border:1px solid var(--border-strong);border-radius:17px;padding:24px}.library-source h3{margin:15px 0 8px;font-size:27px}.library-source p{color:var(--muted);max-width:36ch;font-size:13px;line-height:1.65}.library-source a{text-underline-offset:5px;align-items:center;gap:10px;margin-top:21px;font-size:13px;font-weight:600;text-decoration:underline;display:inline-flex}.library-mocks{margin-top:30px}.library-paper-list{margin:0;padding:0;list-style:none}.library-paper-row{border-bottom:1px solid var(--border-strong);justify-content:space-between;align-items:center;gap:24px;padding:19px 0;display:flex}.library-row-copy{min-width:0}.library-row-label{color:var(--muted);flex-wrap:wrap;align-items:center;gap:10px;font-size:10px;display:flex}.library-paper-row h4{margin-top:7px;font-size:23px;line-height:1.2}.library-paper-row .library-stats{margin-top:8px}.library-edition{color:var(--muted);margin-top:7px;font-size:11px}.library-practice .library-paper-row{flex-wrap:wrap;gap:10px}.library-show-more{align-items:center;gap:8px;padding:16px 0;font-size:12px;display:flex}.library-show-more[aria-expanded=true] svg{transform:rotate(180deg)}.library-original-note{color:var(--muted);margin-top:30px;font-size:11px;line-height:1.5}.library-empty{border:1px dashed var(--border-strong);border-radius:15px;margin-top:24px;padding:30px}.library-empty h3{font-size:25px}.library-empty p,.library-availability{color:var(--muted);margin-top:10px;font-size:13px;line-height:1.6}.library-empty a,.library-empty button{align-items:center;gap:10px;margin-top:16px;font-size:13px;text-decoration:underline;display:inline-flex}.library-availability a{text-decoration:underline}.library-back{color:var(--muted);align-items:center;gap:8px;margin-bottom:26px;font-size:12px;display:inline-flex}.paper-detail{max-width:850px}.paper-detail .library-hero{margin-top:6px}.paper-detail .library-hero h1{font-size:43px}.paper-detail-launch{margin:26px 0}.paper-detail-questions{margin-top:30px}.paper-detail-questions h2{margin-bottom:12px;font-size:26px}.paper-detail-questions ol{margin:0;padding:0;list-style:none}.paper-detail-questions li{border-bottom:1px solid var(--border);justify-content:space-between;gap:16px;padding:13px 0;font-size:13px;display:flex}.paper-detail-questions li span:last-child{color:var(--muted);white-space:nowrap}.paper-detail-questions summary{cursor:pointer;padding:18px 0;font-size:13px}.paper-detail-source{color:var(--muted);margin-top:25px;font-size:12px}.paper-detail-source a{text-underline-offset:4px;text-decoration:underline}@media (max-width:760px){.paper-library{padding:25px 20px 48px}.library-hero{gap:10px}.library-hero h1{font-size:36px}.library-mascot{width:76px;height:86px}.library-guide{gap:12px}.library-guide span{font-size:11px;line-height:1.5}.library-filter-fields{flex-wrap:wrap}.library-main-groups[data-paired=true]{grid-template-columns:1fr}.library-paper-row{gap:15px}.library-paper-actions{gap:12px}.library-featured{padding:22px}.library-subject-heading h2{font-size:30px}}@media (max-width:520px){.library-hero h1{font-size:32px}.library-hero>div>p:last-child{max-width:28ch;font-size:12px}.library-mascot{width:60px;height:72px}.library-guide{grid-template-columns:1fr;gap:8px;padding:14px 0}.library-guide p{font-size:11px;display:block}.library-guide strong{margin-right:8px}.library-controls{margin:20px 0 26px}.library-course-controls{flex-wrap:wrap;gap:12px}.library-course-controls label{flex-basis:calc(50% - 6px);min-width:0;max-width:none}.library-controls select{min-width:0;font-size:12px}.library-filter-toggle{align-items:center;gap:8px;min-height:40px;font-size:12px;display:flex}.library-filter-fields{gap:14px;margin-top:10px;display:none}.library-filter-fields[data-open=true]{display:flex}.library-filter-fields>label{flex:1}.library-kind-filter{width:100%}.library-kind-filter>div{justify-content:space-between}.library-kind-filter button{flex:1}.library-subject-heading{align-items:start}.library-subject-heading>p{text-align:right;max-width:90px;padding-top:4px;font-size:10px}.library-featured h3{font-size:29px}.library-paper-row{flex-direction:column;align-items:stretch;gap:12px}.library-paper-row .library-paper-actions{justify-content:space-between}.library-group-heading h3{font-size:22px}.library-source{padding:20px}.paper-detail .library-hero h1{font-size:34px}}@media (prefers-reduced-motion:reduce){.paper-library *{transition:none!important;animation:none!important}.library-launch .ppg-button:hover,.library-continue:hover{transform:none}}.product-shell .library-home{width:100%;max-width:var(--content-width);margin-inline:auto;padding:64px 24px 100px}.library-home :is(h1,h2,h3){font-family:var(--font-product-serif),Georgia,serif;letter-spacing:-.035em;font-weight:400}.library-home .library-hero{gap:48px;margin-bottom:72px}.library-home .library-hero h1{margin:24px 0;font-size:clamp(48px,5.5vw,76px);line-height:1.04}.library-home .library-hero>div>p:last-child{font-size:16px;line-height:1.7}.library-home .library-mascot{object-fit:contain;width:180px;height:180px}.library-home .library-eyebrow{letter-spacing:.2em}.library-home .library-controls{margin:0 0 64px}.library-home .library-course-controls{justify-content:space-between;align-items:end;gap:24px}.library-home .library-course-controls label{font-size:24px;font-family:var(--font-product-serif),serif;color:var(--fg);gap:18px;max-width:380px;font-weight:400}.library-home .library-controls select{border-color:var(--border);background:var(--card-warm);height:50px;font-size:14px;font-family:var(--font-product-sans),sans-serif;border-radius:14px}.library-home .library-filter-toggle{border:1px solid var(--border);border-radius:999px;justify-content:center;align-items:center;gap:8px;min-height:50px;padding:12px 22px;font-size:13px;display:inline-flex}.library-home .library-filter-toggle:hover{background:var(--hover)}.library-home .library-board-switch{margin-top:16px}.library-home .library-board-switch label{flex-direction:row;align-items:center;gap:10px;font-size:12px;font-weight:400;display:flex}.library-home .library-board-switch select{background:0 0;border:0;border-radius:0;width:auto;max-width:calc(100% - 50px);height:36px;padding-left:0;font-size:12px}.library-home .library-filter-fields{border-block:1px solid var(--border);flex-wrap:wrap;gap:24px;margin-top:24px;padding:24px 0;display:none}.library-home .library-filter-fields[data-open=true]{display:flex}.library-home .library-subject-heading{margin-bottom:36px}.library-home .library-subject-heading h2{margin:0;font-size:clamp(36px,4.5vw,56px)}.library-subject-meta{color:var(--muted);margin-top:12px;font-size:13px}.library-home .library-main-groups,.library-home .library-main-groups[data-paired=true]{grid-template-columns:1fr;gap:64px;display:grid}.library-home .library-group-heading{margin-bottom:24px}.library-home .library-group-heading h3{font-size:30px}.library-home .library-group-heading p{margin-top:8px;font-size:13px}.library-home .library-featured{border:1px solid var(--border);border-radius:var(--radius-card);background:var(--card-warm);padding:36px}.library-home .library-featured:hover{border-color:var(--border-strong)}.library-home .library-featured h3{font-family:var(--font-product-sans),sans-serif;margin-top:22px;font-size:30px;font-weight:700}.library-home .library-recommendation{letter-spacing:.18em;text-transform:uppercase;color:var(--muted);background:0 0;padding:0;font-size:10px}.library-home .library-stats{gap:8px 18px;margin-top:18px;font-size:13px}.library-home .library-featured .library-paper-actions{margin-top:28px}.library-home .library-source{border:0;border-block:1px solid var(--border);border-radius:0;grid-template-columns:1fr auto;align-items:center;gap:6px 24px;padding:24px 0;display:grid}.library-home .library-source h3{font-family:var(--font-product-sans),sans-serif;margin:0;font-size:20px;font-weight:600}.library-home .library-source p{grid-column:1;max-width:none;font-size:13px}.library-home .library-source a{grid-area:1/2/3;margin:0;font-size:13px}.library-home .library-mocks{margin-top:64px}.library-home .library-paper-row{border-color:var(--border);padding:24px 0}.library-home .library-paper-row h4{font-family:var(--font-product-sans),sans-serif;letter-spacing:-.02em;margin:0;font-size:21px;font-weight:600}.library-home .library-row-label:empty{display:none}.library-home .library-row-label:has(.library-access){margin-bottom:8px}.library-home .library-paper-row .library-stats{margin-top:8px}.library-home .library-paper-row .library-launch .ppg-button{min-width:0;box-shadow:none;background:0 0;border:0;padding:10px 0}.library-home .library-paper-row .library-launch .ppg-button:hover{text-underline-offset:4px;text-decoration:underline;transform:none}.library-home .library-original-note{margin-top:48px}@media (max-width:760px){.product-shell .library-home{padding:36px 20px 72px}.library-home .library-hero{gap:24px;margin-bottom:56px}.library-home .library-hero h1{font-size:clamp(40px,7vw,58px)}.library-home .library-mascot{width:100px;height:120px}.library-home .library-main-groups,.library-home .library-main-groups[data-paired=true]{gap:48px}.library-home .library-mocks{margin-top:48px}}@media (max-width:520px){.library-home .library-hero{padding-top:90px;position:relative}.library-home .library-mascot{width:80px;height:80px;position:absolute;top:0;left:0}.library-home .library-hero h1{font-size:40px}.library-home .library-hero>div>p:last-child{max-width:none;font-size:15px}.library-home .library-course-controls{flex-wrap:nowrap;gap:12px}.library-home .library-course-controls label{flex:1;font-size:25px}.library-home .library-controls{margin-bottom:48px}.library-home .library-filter-fields[data-open=true]{flex-direction:column;align-items:stretch;display:flex}.library-home .library-featured{padding:24px}.library-home .library-source{grid-template-columns:1fr}.library-home .library-source a{grid-area:auto/1;margin-top:16px}.library-home .library-group-heading h3{font-size:27px}}.library-home .library-paper-row .library-launch .ppg-button{color:var(--fg)}
