.paragraph-lesson{background:var(--paper);color:var(--ink-soft);font-family:var(--font-fa);font-weight:500;line-height:1.9}.paragraph-lesson *{box-sizing:border-box}.paragraph-lesson a{color:inherit}.paragraph-lesson__skip{position:absolute;inset-inline-start:1rem;top:-4rem;background:var(--ink);color:var(--paper);padding:.5rem 1rem;z-index:3}.paragraph-lesson__skip:focus{top:1rem}.paragraph-lesson__progress{position:fixed;inset:0 auto auto 0;width:var(--paragraph-progress,0%);height:3px;background:var(--ink);z-index:4}.paragraph-lesson__header{max-width:1200px;margin:auto;min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:0 24px;border-bottom:1px solid var(--line)}.paragraph-lesson__header>a:first-child,.paragraph-lesson__footer>a{font-weight:700;color:var(--ink);text-decoration:none}.paragraph-lesson__header nav,.paragraph-lesson__footer nav{display:flex;gap:1rem}.paragraph-lesson__header nav a{font-size:.9rem}.paragraph-lesson__opening,.paragraph-lesson__video,.paragraph-lesson__body,.paragraph-lesson__close,.paragraph-lesson__markread{max-width:1120px;margin-inline:auto;padding-inline:24px}.paragraph-lesson__opening{display:grid;grid-template-columns:minmax(0,1fr) minmax(240px,320px);gap:clamp(2rem,8vw,8rem);align-items:center;padding-block:clamp(3rem,8vw,7rem)}.paragraph-lesson__eyebrow{font-size:.8rem;color:var(--ink-soft);margin:0 0 1rem}.paragraph-lesson h1,.paragraph-lesson h2{font-family:var(--font-display);font-weight:700;color:var(--ink);line-height:var(--lh-heading);margin:0}.paragraph-lesson h1{font-size:clamp(40px,5vw,56px);max-width:12ch}.paragraph-lesson h2{font-size:var(--fs-h2);margin-bottom:1rem}.paragraph-lesson__opening p:not(.paragraph-lesson__eyebrow){font-size:1.15rem;max-width:49ch;margin:1.5rem 0}.paragraph-lesson__actions{display:flex;flex-wrap:wrap;gap:.75rem;align-items:center}.paragraph-lesson__path{margin:0;max-width:320px}.paragraph-lesson__path img{display:block;width:min(100%,240px);height:auto;margin-inline:auto}.paragraph-lesson__path figcaption{font-size:.95rem;color:var(--ink);margin-top:1rem}.paragraph-lesson__path ol{padding:0 1.2rem 0 0;margin:.75rem 0 0;font-size:.9rem}.paragraph-lesson__video{padding-bottom:clamp(3rem,7vw,6rem)}.paragraph-lesson__video>p{margin:0 0 1rem}.paragraph-lesson__player{background:var(--ink);padding:clamp(.75rem,2vw,1.5rem);color:var(--paper)}.paragraph-lesson__player video{display:block;width:100%;aspect-ratio:16/9;background:var(--ink)}.paragraph-lesson__player .btn{margin-top:1rem}.paragraph-lesson__media-error{margin:.75rem 0 0}.paragraph-lesson [hidden]{display:none!important}.paragraph-lesson__body{display:grid;grid-template-columns:210px minmax(0,680px);gap:clamp(2rem,7vw,7rem);align-items:start}.paragraph-lesson__rail{position:sticky;top:1rem;font-size:.9rem}.paragraph-lesson__rail nav{display:grid;gap:.65rem;border-inline-start:1px solid var(--line);padding-inline-start:1rem;margin-bottom:1.2rem}.paragraph-lesson__rail a{text-decoration:none}.paragraph-lesson__rail a:hover,.paragraph-lesson__rail a:focus-visible{text-decoration:underline;color:var(--ink)}.paragraph-lesson__article section{padding-block:clamp(2.8rem,6vw,5.5rem);border-top:1px solid var(--line)}.paragraph-lesson__article p{max-width:62ch;margin:0 0 1rem}.paragraph-lesson__english{direction:ltr;text-align:left;font-family:var(--font-en);background:var(--slip);border-inline-start:3px solid var(--ink);padding:1rem 1.2rem;line-height:1.75}.paragraph-lesson__contrast{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:1.5rem 0}.paragraph-lesson__contrast div{padding:1rem;border-top:2px solid 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details{margin-top:1rem;border-inline-start:2px solid var(--ink);padding-inline-start:1rem}.paragraph-lesson__attempt summary{cursor:pointer;font-weight:600}.paragraph-lesson__attempt__revision{margin-top:1rem}.paragraph-lesson__close{padding-block:clamp(3rem,8vw,7rem);max-width:680px}.paragraph-lesson__close>a,.paragraph-lesson__next{display:block;margin-top:1rem}.paragraph-lesson__markread{padding-bottom:4rem}.paragraph-lesson__footer{border-top:1px solid var(--line);padding:2rem 24px;max-width:1200px;margin:auto;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.9rem}.paragraph-lesson__mobile-map{display:none}@media(max-width:800px){.paragraph-lesson__opening{grid-template-columns:1fr}.paragraph-lesson__path{max-width:280px}.paragraph-lesson__body{grid-template-columns:1fr}.paragraph-lesson__rail{position:static;order:-1;border-top:1px solid var(--line);padding-top:1.5rem}.paragraph-lesson__rail nav{grid-template-columns:1fr 1fr}.paragraph-lesson__mobile-map{display:block;position:sticky;top:0;background:var(--paper);z-index:2;border-bottom:1px solid var(--line);padding:.6rem 24px}.paragraph-lesson__mobile-map button{width:100%;border:0;background:transparent;font:600 .9rem var(--font-fa);display:flex;justify-content:space-between}.paragraph-lesson__mobile-map nav{padding-top:.75rem}.paragraph-lesson__mobile-map nav a{display:block;padding:.5rem 0}.paragraph-lesson__contrast{grid-template-columns:1fr}}@media(max-width:480px){.paragraph-lesson__header{padding-inline:16px}.paragraph-lesson__header nav{display:none}.paragraph-lesson__opening,.paragraph-lesson__video,.paragraph-lesson__body,.paragraph-lesson__close,.paragraph-lesson__markread{padding-inline:16px}.paragraph-lesson__rail nav{grid-template-columns:1fr}.paragraph-lesson__actions{align-items:stretch}.paragraph-lesson__actions .btn{width:100%}}@media 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.paragraph-lesson__path{max-width:240px}.paragraph-lesson__path img{width:min(100%,240px)}.paragraph-lesson__player video{max-width:100%;height:auto}.paragraph-lesson__english{font-family:var(--font-en);background:var(--slip)}.paragraph-lesson__contrast div,.paragraph-lesson__attempt__first{background:var(--slip)}

.paragraph-lesson__brand{display:inline-flex;align-items:center;gap:12px}.paragraph-lesson__footer nav{flex-wrap:wrap}.paragraph-lesson h2[id],.paragraph-lesson section[id]{scroll-margin-top:70px}.paragraph-lesson__attempt__first{unicode-bidi:plaintext;overflow-wrap:anywhere}.paragraph-lesson__interactive textarea:focus-visible,.paragraph-lesson summary:focus-visible,.paragraph-lesson__mobile-map button:focus-visible{outline:3px solid var(--ink);outline-offset:4px}.paragraph-lesson__attempt label{font-size:16px}.paragraph-lesson__player video{height:auto}.paragraph-lesson__path img{max-width:240px}.paragraph-lesson__skip:focus{color:var(--paper)}@media(prefers-reduced-motion:reduce){.paragraph-lesson{scroll-behavior:auto}}@media print{.paragraph-lesson__interactive,.paragraph-lesson__fallback{display:none!important}.paragraph-lesson__attempt{break-inside:avoid}.paragraph-lesson__attempt::after{content:"";display:block;height:65mm;border:1px solid var(--line)}}

/* Companion navigation: format switch, rail door, and the existing workbook card. */
.paragraph-lesson .fswitch{max-width:1120px;margin:1.5rem auto 0;padding:0 24px;display:flex;flex-wrap:wrap;gap:.75rem;align-items:center}.paragraph-lesson .fswitch span,.paragraph-lesson .fswitch a{padding:.5rem 1rem;border:1px solid var(--line);border-radius:8px;text-decoration:none}.paragraph-lesson .fswitch [aria-current]{background:var(--ink);color:var(--paper)}.paragraph-lesson .fswitch a:hover,.paragraph-lesson .fswitch a:focus-visible{border-color:var(--ink);text-decoration:underline}.paragraph-lesson .lrail__companion{display:block;border:1px solid var(--line);border-radius:8px;padding:.8rem;margin-bottom:1rem;color:var(--ink);font-weight:600}.paragraph-lesson .companion-card{border-block:1px solid var(--line);background:var(--slip)}