/* Draconitic learning library: catalog and free-download surface. */
.library-hero { position: relative; display: grid; grid-template-columns: minmax(0,1.25fr) minmax(320px,.75fr); gap: 24px; align-items: center; min-height: min(820px,calc(100svh - 74px)); width: min(100%,var(--max)); padding: 24px 24px; margin: auto; overflow: hidden; border-bottom: 1px solid var(--line); }
.library-hero::before { position: absolute; inset: 0; content: ""; pointer-events: none; background: radial-gradient(700px 480px at 85% 46%,color-mix(in srgb, var(--bio) 4%, transparent),transparent 70%),linear-gradient(120deg,color-mix(in srgb, var(--brand) 4%, transparent),transparent 44%); }
.library-hero-copy,.library-hero-index { position: relative; z-index: 1; }
.library-hero h1 { max-width: 980px; margin: 1rem 0 1.3rem; font-size: 24px; font-weight: 600; line-height: 1.02; letter-spacing: -.01em; }
.library-hero-copy > p { max-width: 780px; margin: 0; color: var(--ink-soft); font-size: clamp(1.04rem,1.7vw,1.3rem); }
.library-domain-line { display: flex; flex-wrap: wrap; padding: .85rem 0; margin: 2rem 0 0; list-style: none; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.library-domain-line li { padding: 0 1rem; border-right: 1px solid var(--line); color: var(--bio); font: 700 .75rem var(--mono);   }.library-domain-line li:first-child { padding-left: 0; }.library-domain-line li:last-child { border: 0; }
.library-hero-actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 2rem; }
.library-hero-index { padding: 1.4rem; border: 1px solid var(--line); background: rgba(30, 33, 36, 0.94); box-shadow: 0 28px 100px rgba(0, 0, 0, 0.351); }
.library-hero-index dl { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); margin: 1.5rem 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.library-hero-index dl div { min-height: 116px; padding: 1rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.library-hero-index dt { color: var(--dim); font: 650 .75rem var(--mono);  }.library-hero-index dd { margin: .5rem 0 0; color: var(--bio); font: 350 24px var(--sans); }
.library-hero-index p { margin: 0; color: var(--muted); font-size: .78rem; }
.library-local-nav { position: sticky; top: var(--fg-sticky-top); z-index: 19; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); border-bottom: 1px solid var(--line); background: rgba(30, 33, 36, 0.94); backdrop-filter: blur(14px); }
.library-local-nav a { display: flex; min-height: 50px; align-items: center; justify-content: center; gap: .6rem; border-right: 1px solid var(--line); color: var(--muted); font: 650 .75rem var(--mono); text-decoration: none;  }.library-local-nav a:hover { color: var(--bio); }.library-local-nav span { color: var(--brand-bright); }
.library-section { width: min(100%,var(--max)); padding: 24px 24px; margin: auto; border-bottom: 1px solid var(--line); }
.library-section-heading { display: grid; grid-template-columns: minmax(0,1fr) minmax(280px,520px); gap: 24px; align-items: end; margin-bottom: 24px; }.library-section-heading h2 { max-width: 900px; margin: .7rem 0 0; font-size: 24px; font-weight: 500; line-height: .95; letter-spacing: -.01em; }.library-section-heading > p { margin: 0; padding-left: 1.2rem; border-left: 1px solid var(--brand); color: var(--muted); }
.library-open-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.library-open-grid a { display: flex; min-height: 0; flex-direction: column; gap: 6px; padding: 14px; background: linear-gradient(145deg,color-mix(in srgb, var(--bio) 4%, transparent),transparent 38%),var(--surface); text-decoration: none; }.library-open-grid a:hover { background: linear-gradient(145deg,color-mix(in srgb, var(--bio) 5%, transparent),transparent 48%),var(--surface); }.library-open-grid span { color: var(--bio); font: 700 .75rem var(--mono);  }.library-open-grid h3 { margin: auto 0 1rem; color: var(--ink); font-size: 20px; font-weight: 500; line-height: .98; letter-spacing: -.01em; }.library-open-grid p { max-width: 640px; color: var(--muted); font-size: .83rem; }.library-open-grid strong { color: var(--bio); font: 700 .75rem var(--mono); }
.library-free-downloads { display: grid; grid-template-columns: minmax(240px,.6fr) minmax(0,1.4fr); gap: 24px; padding-top: 24px; }.library-free-downloads header h3 { margin: .8rem 0; font-size: 24px; font-weight: 500; line-height: 1; letter-spacing: -.01em; }.library-free-downloads header p { color: var(--muted); }
.library-free-downloads ol { padding: 0; margin: 0; list-style: none; border-top: 1px solid var(--line); }.library-free-downloads li a { display: grid; grid-template-columns: 2.5rem minmax(0,1fr) auto; gap: 1rem; align-items: center; min-height: 64px; padding: .75rem; border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; }.library-free-downloads li a:hover { background: color-mix(in srgb, var(--bio) 4%, transparent); }.library-free-downloads li span,.library-free-downloads li small { color: var(--bio); font: 700 .75rem var(--mono); }.library-free-downloads li strong { font-size: .8rem; font-weight: 600; }
.library-filter { display: grid; grid-template-columns: minmax(240px,1.4fr) repeat(2,minmax(170px,.55fr)) auto; gap: .75rem; align-items: end; padding: 1rem; border: 1px solid var(--line); background: var(--surface); }.library-filter label { display: grid; gap: .4rem; color: var(--brand-bright); font: 700 .75rem var(--mono);   }.library-filter input,.library-filter select { min-height: 46px; width: 100%; padding: .65rem .75rem; border: 1px solid var(--line); border-radius: 0; outline: 0; background: var(--surface); color: var(--ink); font: .82rem var(--sans); }.library-filter input:focus,.library-filter select:focus { border-color: var(--brand); }.library-filter button { min-height: 46px; padding: .7rem; border: 0; background: transparent; color: var(--brand-bright); font: 700 .75rem var(--mono); text-decoration: underline; text-underline-offset: 4px; }
.library-filter input:focus-visible,.library-filter select:focus-visible { outline: 3px solid var(--brand-bright); outline-offset: 2px; }
.library-result-bar { display: flex; justify-content: space-between; gap: 1rem; padding: .9rem .2rem; border-bottom: 1px solid var(--line); color: var(--muted); font: .75rem var(--mono); }.library-result-bar p { margin: 0; }.library-result-bar span { color: var(--dim);  }
.library-state { display: flex; min-height: 170px; align-items: center; justify-content: center; gap: 1rem; margin-top: 1rem; padding: 2rem; border: 1px solid var(--line); background: var(--surface); }.library-state[hidden] { display: none; }.library-state > span { color: var(--bio); font: 700 1.5rem var(--mono); }.library-state p { margin: .25rem 0 0; color: var(--muted); }.library-state.is-error { border-color: color-mix(in srgb, var(--brand) 36%, transparent); }.library-state .button { margin-left: 1rem; }
.library-empty { padding: 4rem 2rem; margin-top: 1rem; border: 1px solid var(--line); text-align: center; }.library-empty[hidden] { display: none; }.library-empty > span { color: var(--brand-bright); font: 700 1.3rem var(--mono); }.library-empty h3 { margin: 1rem 0 .4rem; font-size: 18px; }.library-empty p { color: var(--muted); }
.library-asset-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 1rem; padding-top: 1.25rem; }.library-asset-grid[hidden] { display: none; }.library-asset-card { display: flex; min-height: 430px; flex-direction: column; padding: 1.3rem; border: 1px solid var(--line); background: linear-gradient(150deg,color-mix(in srgb, var(--bio) 4%, transparent),transparent 36%),var(--surface); }.library-asset-card:hover { border-color: color-mix(in srgb, var(--bio) 35%, transparent); }.library-asset-card header { display: flex; justify-content: space-between; gap: 1rem; }.library-asset-card header span,.library-access-badge { color: var(--bio); font: 700 .75rem var(--mono);   }.library-access-badge { padding: .3rem .42rem; border: 1px solid color-mix(in srgb, var(--bio) 20%, transparent); }.library-access-badge.is-pack { color: var(--amber); border-color: color-mix(in srgb, var(--amber) 25%, transparent); }.library-asset-card h3 { margin: 2.4rem 0 .8rem; font-size: 20px; font-weight: 400; line-height: 1.04; letter-spacing: -.01em; }.library-asset-card > p { color: var(--muted); font-size: .8rem; }.library-asset-meta { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: 1rem; }.library-asset-meta span { padding: .3rem .4rem; border: 1px solid var(--line); color: var(--dim); font: .75rem var(--mono); }.library-asset-card footer { display: flex; justify-content: space-between; gap: 1rem; align-items: center; padding-top: 1rem; margin-top: auto; border-top: 1px solid var(--line); }.library-asset-card footer small { color: var(--dim); font: .75rem var(--mono); }.library-asset-card footer a { color: var(--bio); font: 700 .75rem var(--mono); }
.library-noscript { padding: 1rem; border: 1px solid var(--line); color: var(--muted); }
.library-pack-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; }.library-pack-grid article { display: flex; min-height: 400px; flex-direction: column; padding: 20px; border: 1px solid var(--line); background: var(--surface); }.library-pack-grid article > span { color: var(--bio); font: 700 .75rem var(--mono);  }.library-pack-grid h3 { max-width: 580px; margin: auto 0 1rem; font-size: 24px; font-weight: 500; line-height: .98; letter-spacing: -.01em; }.library-pack-grid p { max-width: 620px; color: var(--muted); }.library-pack-grid a { color: var(--bio); font: 700 .75rem var(--mono); }.library-pack-grid .is-complete { grid-column: 1 / -1; min-height: 430px; border-color: color-mix(in srgb, var(--brand) 30%, transparent); background: radial-gradient(600px 360px at 90% 10%,color-mix(in srgb, var(--brand) 5%, transparent),transparent 68%),var(--surface); }.library-pack-grid .is-complete > span,.library-pack-grid .is-complete a { color: var(--brand-bright); }
.library-calculus { display: flex; justify-content: space-between; gap: 2rem; align-items: end; padding: 20px; margin-top: 1rem; border: 1px solid var(--line); background: linear-gradient(100deg,color-mix(in srgb, var(--cyan) 4%, transparent),transparent 50%); }.library-calculus h3 { margin: .8rem 0 .5rem; font-size: 20px; font-weight: 420; letter-spacing: -.01em; }.library-calculus p { max-width: 760px; margin: 0; color: var(--muted); }
.library-mcat { display: grid; grid-template-columns: auto .7fr 1.25fr auto; gap: 24px; align-items: center; width: min(100%,var(--max)); padding: 24px 24px; margin: auto; border-bottom: 1px solid var(--line); background: linear-gradient(105deg,color-mix(in srgb, var(--violet) 4%, transparent),transparent 52%); }.library-mcat-index { color: var(--violet); font-size: 18px; }.library-mcat h2 { margin: .6rem 0 0; font-size: 24px; font-weight: 500; letter-spacing: -.01em; }.library-mcat p { margin: 0; color: var(--ink-soft); }.library-mcat > a { color: var(--violet); font: 700 .75rem var(--mono); white-space: nowrap; }
.library-edition-method ol { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); padding: 0; margin: 0; list-style: none; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }.library-edition-method li { min-height: 290px; padding: 1.5rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }.library-edition-method li > span { color: var(--bio); font: 700 .75rem var(--mono); }.library-edition-method li strong { display: block; margin-top: 5rem; font-size: 1.25rem; }.library-edition-method li p { color: var(--muted); font-size: .78rem; }
@media (max-width: 1050px) { .library-hero { grid-template-columns: 1fr; min-height: 0; }.library-hero-index { max-width: 720px; }.library-asset-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }.library-free-downloads { grid-template-columns: 1fr; }.library-edition-method ol { grid-template-columns: repeat(2,minmax(0,1fr)); }.library-mcat { grid-template-columns: auto 1fr; }.library-mcat p,.library-mcat > a { grid-column: 2; white-space: normal; } }
@media (max-width: 760px) { .library-local-nav { position: static; grid-template-columns: repeat(2,minmax(0,1fr)); }.library-section-heading { grid-template-columns: 1fr; }.library-section-heading > p { padding: 1rem 0 0; border-left: 0; border-top: 1px solid var(--brand); }.library-open-grid,.library-pack-grid,.library-asset-grid { grid-template-columns: 1fr; }.library-pack-grid .is-complete { grid-column: auto; }.library-filter { grid-template-columns: 1fr 1fr; }.library-filter label:first-child { grid-column: 1 / -1; }.library-calculus { display: grid; align-items: start; } }
@media (max-width: 520px) { .library-hero h1 { font-size: 20px; }.library-domain-line { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); }.library-domain-line li { padding: .4rem 0; border: 0; }.library-filter,.library-edition-method ol { grid-template-columns: 1fr; }.library-filter label:first-child { grid-column: auto; }.library-free-downloads li a { grid-template-columns: 2rem 1fr; }.library-free-downloads li small { display: none; }.library-open-grid a,.library-pack-grid article { min-height: 310px; }.library-mcat { grid-template-columns: 1fr; }.library-mcat p,.library-mcat > a { grid-column: 1; } }
@media (prefers-reduced-motion: reduce) { .library-open-grid a,.library-asset-card { transition: none; } }

/* Section heads under the masthead read as section titles, not as a second page header. */
.library-section-heading { display: block; margin-bottom: 14px; }
.library-section-heading h2 { margin: 0 0 4px; font-size: 17px; font-weight: 600; line-height: 1.3; }
.library-section-heading > p { max-width: 80ch; margin: 0; padding: 0; border: 0; color: var(--muted); font-size: 13.5px; }