/* Shared lesson layout and accessible enhancements for static pages. */
:root{color-scheme:light}
.learning-wrap{width:min(1040px,calc(100% - 36px));margin-inline:auto}
.learning-header,.learning-footer{background:#fff;border-block:1px solid #dbe5ef;padding:22px 0}
.learning-header .learning-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.learning-brand{font:800 22px/1.4 system-ui,sans-serif;color:#142b43;text-decoration:none}
.learning-brand span{color:#155ab6}
.learning-header nav,.learning-footer nav,.learning-next,.learning-toc{display:flex;flex-wrap:wrap;gap:12px 22px}
.learning-header nav a,.learning-footer a,.learning-article a{color:#155ab6;text-underline-offset:3px}
.learning-article{font:17px/1.8 system-ui,-apple-system,"Segoe UI",sans-serif;color:#23364c;max-width:850px;padding:38px 0 56px;overflow-wrap:break-word}
.learning-article h1{font-size:clamp(30px,5vw,46px);line-height:1.18;letter-spacing:-.025em;color:#142b43;margin:22px 0}
.learning-article h2{font-size:26px;line-height:1.3;margin:36px 0 14px;color:#142b43}
.learning-article h3{font-size:20px;line-height:1.45}
.learning-crumb,.learning-meta{font-size:14px;color:#465b72}
.learning-answer{font-size:20px;line-height:1.7;border-left:4px solid #155ab6;padding:16px 20px;background:#f1f6fc}
.learning-toc{padding:18px 0;border-block:1px solid #dbe5ef;font-size:15px}
.learning-example{background:#f3f7fc;border:1px solid #d3dfed;border-radius:12px;padding:0 24px 16px;margin:28px 0}
.learning-example h2{margin-top:24px}
.learning-article details{border:1px solid #ccd9e8;border-radius:8px;padding:14px 18px;background:#fff}
.learning-article summary{cursor:pointer;color:#155ab6;font-weight:700}
.learning-sources{font-size:15px;border-top:1px solid #dbe5ef;margin-top:36px}
.learning-next{border-top:1px solid #dbe5ef;padding-top:24px;margin-top:30px}
.learning-footer{font:14px/1.7 system-ui,sans-serif;color:#465b72}
.learning-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:18px}
.learning-card{border:1px solid #d3dfed;border-radius:12px;padding:20px;background:#f3f7fc}
.learning-card h2{margin-top:0;font-size:23px}
.learning-article table{border-collapse:collapse;width:100%;font-size:15px}
.learning-article th,.learning-article td{border:1px solid #ccd9e8;padding:10px;text-align:left;vertical-align:top}
.learning-article th{background:#eef4fb}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #804c00;outline-offset:4px}
.skip-link{position:fixed;left:16px;top:-100px;z-index:10000;background:#fff;color:#124b96;padding:12px 18px;border:2px solid #124b96}
.skip-link:focus{top:12px}
.crumb a,.learning-crumb a{text-decoration:underline!important;text-underline-offset:3px}
.site-editorial{max-width:850px;margin:32px auto;padding:20px;border:1px solid #ccd9e8;background:#f5f8fc;color:#263c54;font:15px/1.7 system-ui,sans-serif;overflow-wrap:anywhere}
.site-editorial h2{font-size:21px!important;line-height:1.4!important;margin:0 0 12px!important}
.site-editorial a{color:#155ab6!important;text-decoration:underline!important;text-underline-offset:3px}
.site-editorial li{margin:8px 0}
.site-editorial small{font-size:13px}
@media(max-width:600px){.learning-article{font-size:16px;padding-top:24px}.learning-answer{font-size:18px;padding:14px}.learning-example{padding-inline:16px}.learning-header nav{gap:12px 18px}.site-editorial{margin:24px 12px;padding:16px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}