/* Local reading surfaces; shared header and footer retain their own contract. */
.info-library { --library-rule: var(--info-line); --library-accent: var(--info-violet); }
.info-library main { padding-top: 78px; }
.info-library main :where(h1,h2,h3,p,dl,dd) { margin: 0; }
.info-library main :where(h1,h2,h3) { color: var(--info-ink); font-family: inherit; text-wrap: balance; }
.info-library main h1 { max-width: 12ch; font-size: clamp(3rem, 6.4vw, 6rem); line-height: 1.02; letter-spacing: -.035em; font-weight: 800; }
.info-library main h2 { font-size: clamp(1.7rem, 3vw, 2.6rem); line-height: 1.18; letter-spacing: -.025em; font-weight: 750; }
.info-library main h3 { font-size: 1.22rem; line-height: 1.35; letter-spacing: -.015em; font-weight: 750; }
.info-library main p { line-height: 1.75; }
.info-library main a { text-underline-offset: .22em; }
.info-library main a:hover { color: var(--library-accent); }
.info-library main [id] { scroll-margin-top: 108px; }
.info-library main ::selection { background: var(--info-violet); color: white; }
.info-library main input { caret-color: var(--info-violet); }
.info-library main [hidden] { display: none !important; }
.info-library .info-button { border-radius: 4px; transform: none; }
.info-library .info-button:hover { transform: none; }
.info-library .info-button--primary:hover { color: white; }
.library-hero { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr); align-items: end; gap: clamp(2rem, 7vw, 6rem); padding-block: clamp(3.5rem, 7vw, 6.5rem) clamp(2.75rem, 5vw, 4.5rem); border-bottom: 1px solid var(--library-rule); }
.library-lead { max-width: 46ch; margin-top: 1.5rem !important; font-size: clamp(1.06rem, 1.5vw, 1.25rem); color: var(--info-muted); }
.library-jump { display: flex; min-height: 48px; align-items: center; justify-content: space-between; gap: 1.5rem; border-bottom: 1px solid var(--info-ink); text-decoration: none; font-weight: 650; }
.library-jump svg { flex: none; }
.knowledge-index { padding-block: 2rem clamp(4rem, 7vw, 6rem); }
.topic-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; justify-content: space-between; padding-bottom: 1.5rem; }
.topic-toolbar p { color: var(--info-muted); font-size: .9rem; }
.topic-filters { display: flex; flex-wrap: wrap; gap: .5rem; }
.topic-filters button { min-height: 44px; border: 1px solid var(--library-rule); border-radius: 4px; background: transparent; color: var(--info-ink); padding: .6rem .85rem; font: inherit; font-size: .9rem; font-weight: 600; line-height: 1.3; cursor: pointer; }
.topic-filters button:hover { border-color: var(--info-ink); }
.topic-filters button[aria-pressed="true"] { border-color: var(--info-ink); background: var(--info-ink); color: var(--info-paper-soft); }
.knowledge-entry { display: grid; grid-template-columns: minmax(10rem, .35fr) minmax(0, 1fr); gap: clamp(1.5rem, 5vw, 5rem); padding-block: 2.4rem; border-top: 1px solid var(--library-rule); }
.knowledge-meta { display: flex; flex-direction: column; align-items: start; gap: .5rem; font-size: .88rem; line-height: 1.5; color: var(--info-muted); }
.knowledge-meta span:first-child { color: var(--library-accent); font-weight: 650; }
.knowledge-copy { max-width: 70ch; }
.knowledge-copy h2 { max-width: 27ch; font-size: clamp(1.6rem, 2.8vw, 2.2rem) !important; }
.knowledge-copy p { margin-top: 1rem !important; color: var(--info-muted); }
.knowledge-copy .read-more { display: inline-flex; align-items: center; min-height: 44px; margin-top: .75rem; color: var(--library-accent); font-size: .95rem; font-weight: 650; text-decoration: underline; }
.library-follow { background: var(--info-paper-soft); border-block: 1px solid var(--library-rule); padding-block: clamp(3rem, 6vw, 5rem); }
.library-follow-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: clamp(2rem, 7vw, 7rem); }
.library-follow-grid > * { min-width: 0; }
.library-follow-grid > div > p { margin-top: 1rem; max-width: 50ch; color: var(--info-muted); }
.newsletter-form label { display: block; margin-bottom: .65rem; font-weight: 600; }
.newsletter-fields { display: flex; gap: .65rem; flex-wrap: wrap; }
.newsletter-fields input { flex: 1 1 12rem; min-width: 0; min-height: 48px; padding: .8rem; border: 1px solid var(--info-muted); border-radius: 4px; background: var(--info-paper-soft); color: var(--info-ink); font: inherit; }
.newsletter-fields input::placeholder { color: var(--info-muted); opacity: 1; }
.newsletter-fields button { min-height: 48px; padding: .8rem 1.3rem; border: 1px solid var(--info-ink); border-radius: 4px; background: var(--info-ink); color: white; font: inherit; font-weight: 650; cursor: pointer; }
.newsletter-fields button:hover { background: var(--info-violet); border-color: var(--info-violet); }
.newsletter-fields button:disabled { opacity: .7; cursor: wait; }
#newsletter-hint { font-size: .88rem; }
#newsletter-success { color: var(--info-green); }
#newsletter-error { color: #9b302a; }
.social-follow { padding-top: 2.5rem; margin-top: 2.5rem; border-top: 1px solid var(--library-rule); }
.social-follow > p { margin-top: .5rem; color: var(--info-muted); }
.social-links { display: flex; flex-wrap: wrap; gap: .4rem 2rem; margin-top: 1rem; }
.social-links a { display: inline-flex; align-items: center; min-height: 44px; font-weight: 650; }
.ecosystem-index { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 1rem; align-self: stretch; align-content: end; }
.ecosystem-index a { display: flex; align-items: center; min-height: 44px; padding-block: .6rem; border-bottom: 1px solid var(--library-rule); font-size: .95rem; font-weight: 650; text-decoration: none; }
.technology-section { padding-block: clamp(3rem, 5vw, 4.5rem); }
.library-section-heading { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: end; margin-bottom: 2.5rem; }
.library-section-heading h2 { max-width: 18ch; }
.library-section-heading p { color: var(--info-muted); }
.technology-entry { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, .75fr) minmax(0, 1.4fr); gap: 2rem; align-items: start; border-top: 1px solid var(--library-rule); padding-block: 1.75rem; }
.technology-entry h3 { font-size: clamp(1.3rem, 2vw, 1.65rem) !important; }
.technology-entry .technology-kind { color: var(--info-violet); font-weight: 600; font-size: .9rem; }
.technology-entry > p:last-child { color: var(--info-muted); }
.technology-principles > div + div { margin-top: 1.7rem; padding-top: 1.7rem; border-top: 1px solid var(--library-rule); }
.technology-principles p { margin-top: .6rem !important; color: var(--info-muted); }
.expertise-section { display: grid; grid-template-columns: 1fr 1.2fr; gap: clamp(2rem, 7vw, 7rem); padding-block: clamp(3rem, 5vw, 5rem); }
.expertise-section dl > div { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; padding-block: 1rem; border-bottom: 1px solid var(--library-rule); }
.expertise-section dt { font-weight: 650; }
.expertise-section dd { color: var(--info-muted); }
.library-close { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 2rem; border-top: 1px solid var(--library-rule); padding-block: 3rem 5rem; }
.library-close p { max-width: 60ch; margin-top: 1rem !important; color: var(--info-muted); }
.privacy-layout { display: grid; grid-template-columns: minmax(13rem, .65fr) minmax(0, 1.35fr); gap: clamp(3rem, 8vw, 8rem); padding-block: clamp(2.5rem, 5vw, 4rem) 6rem; align-items: start; }
.privacy-index { position: sticky; top: 110px; }
.privacy-index h2 { font-size: 1rem !important; letter-spacing: 0 !important; margin-bottom: 1rem !important; }
.privacy-index a { display: flex; align-items: center; min-height: 44px; padding-block: .65rem; border-bottom: 1px solid var(--library-rule); font-size: .9rem; line-height: 1.5; text-decoration: none; }
.privacy-copy { max-width: 70ch; overflow-wrap: anywhere; }
.privacy-copy section + section { margin-top: 3.5rem; padding-top: 2.5rem; border-top: 1px solid var(--library-rule); }
.privacy-copy h2 { max-width: 25ch; font-size: clamp(1.5rem, 2.6vw, 2rem) !important; margin-bottom: 1.25rem !important; }
.privacy-copy h3 { margin-block: 2rem 1rem !important; }
.privacy-copy p, .privacy-copy li { color: var(--info-muted); line-height: 1.8; }
.privacy-copy p + p { margin-top: 1rem !important; }
.privacy-copy ul { padding-left: 1.3rem; margin-block: 1rem; }
.privacy-copy li + li { margin-top: .5rem; }
.privacy-copy a { color: var(--library-accent); }
.privacy-copy strong { color: var(--info-ink); }
.privacy-back { padding-top: 3rem; }
@media (min-width: 1500px) { .info-library main { padding-top: 90px; } }
@media (max-width: 900px) {
    .library-hero { grid-template-columns: 1fr; }
    .library-jump { max-width: 24rem; }
    .ecosystem-index { max-width: 40rem; }
    .technology-entry { grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); gap: .65rem 2rem; }
    .technology-entry > p:last-child { grid-column: 2; grid-row: 1 / span 2; }
    .privacy-layout { grid-template-columns: 1fr; gap: 3rem; }
    .privacy-index { position: static; }
    .privacy-index a { display: inline-flex; margin-right: 1rem; }
}
@media (max-width: 640px) {
    .info-library .info-rail { width: calc(100% - 32px); }
    .library-hero { padding-top: 3rem; }
    .info-library main h1 { font-size: clamp(2.65rem, 11.5vw, 3.5rem); overflow-wrap: anywhere; }
    .library-lead { margin-top: 1.25rem !important; }
    .knowledge-entry, .library-follow-grid, .library-section-heading, .expertise-section { grid-template-columns: 1fr; gap: 1.5rem; }
    .knowledge-meta { flex-direction: row; flex-wrap: wrap; justify-content: space-between; gap: .5rem 1rem; }
    .knowledge-entry { padding-block: 1.8rem; }
    .technology-entry { grid-template-columns: 1fr; gap: .6rem; }
    .technology-entry > p:last-child { grid-column: auto; grid-row: auto; }
    .technology-entry .technology-kind { order: -1; }
    .privacy-index a { display: flex; margin: 0; }
    .privacy-layout { padding-bottom: 4rem; }
    .library-close .info-button { width: 100%; }
}
@media (prefers-reduced-motion: reduce) { .info-library { scroll-behavior: auto; } }