@import url('/materials/serata/fonts.css');
:root{--paper:#faf9f6;--ink:#273b34;--muted:#49534c;--green:#52745b;--line:#d1d8cc;--sage:#edf1e8;--accent:#ad4933}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:20px}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.65 Onest,Arial,sans-serif}.shell{width:min(1000px,calc(100% - 40px));margin:auto}a{color:inherit;text-underline-offset:4px}button,input,textarea{font:inherit}button,a,input,textarea,summary{touch-action:manipulation}button{cursor:pointer;min-height:48px;border:1px solid #a5b39e;background:transparent;color:var(--ink);padding:11px 17px;border-radius:7px}button:hover{background:var(--sage)}button:disabled{cursor:default;opacity:.6}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}[hidden]{display:none!important}.top{display:flex;justify-content:space-between;gap:15px;padding-block:22px;border-bottom:1px solid var(--line);font-size:14px}.top>a{text-decoration:none;font-weight:600}.top>span{color:var(--muted)}h1,h2,h3,p{margin:0}h1,h2{font-family:Lora,Georgia,serif;font-weight:500;line-height:1.18;letter-spacing:-.03em}h1{font-size:clamp(52px,9vw,88px);margin:20px 0 26px}h1 em{color:var(--accent);font-weight:400}h2{font-size:clamp(28px,4.4vw,38px)}h3{font-size:20px;line-height:1.4}p+p{margin-top:14px}.intro{padding-block:48px 30px;max-width:800px}.eyebrow{text-transform:uppercase;letter-spacing:.08em;font-size:12px;font-weight:600;color:var(--muted)}.lead{font-size:21px;max-width:680px}.meta{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:14px;color:var(--muted);margin:24px 0}.goal{border-left:2px solid var(--accent);padding-left:18px;max-width:670px}.steps{display:flex;flex-wrap:wrap;gap:8px;margin-block:20px}.steps a{padding:9px 13px;border:1px solid var(--line);border-radius:30px;text-decoration:none;font-size:14px}.steps a:hover{background:var(--sage)}.progress-row{margin:22px 0 40px}.progress-row label{display:flex;justify-content:space-between;font-size:13px;color:var(--muted)}progress{display:block;width:100%;height:6px;accent-color:var(--green);margin-top:10px}section:not(.intro){padding-block:34px;margin-top:20px;border-top:1px solid var(--line)}.section-top{display:grid;grid-template-columns:40px 1fr;gap:20px;margin-bottom:28px}.section-top p{margin-top:14px;max-width:720px;color:var(--muted)}.number{font-family:Lora,Georgia,serif;font-size:22px;color:var(--accent)}.scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.scenario{padding:25px 18px;text-align:left;border:1px solid var(--line);background:#f1f0e9;min-width:0}.scenario .symbol{display:block;font-size:40px;color:var(--accent);margin-bottom:22px;line-height:1}.scenario strong{display:block;font-family:Lora,Georgia,serif;font-size:23px;font-weight:500}.scenario small{display:block;margin-top:6px;font-size:14px;color:var(--muted)}.scenario[aria-pressed=true]{background:#e4ebdc;border-color:var(--green);box-shadow:inset 0 0 0 1px var(--green)}.chat{max-width:740px;margin:0 auto 24px;padding:26px;background:#f0eee7;border-radius:18px}.chat-label{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:13px;margin-bottom:22px}.bubble{padding:18px 22px;background:var(--paper);border-radius:15px 15px 15px 2px;max-width:88%;line-height:1.7}.bubble.reply{margin-left:auto;margin-top:16px;background:#dfe8d8;border-radius:15px 15px 2px 15px}.quiz-list{display:grid;gap:16px;margin-top:26px}.quiz{border:1px solid var(--line);border-radius:10px;padding:22px;background:#fffefa}.quiz legend{float:left;width:100%;font-weight:500;padding:0;margin-bottom:14px}.quiz legend+*{clear:both}.options{display:flex;flex-wrap:wrap;gap:8px}.option{display:flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:6px;padding:10px 13px;cursor:pointer;min-height:48px}.option:has(input:checked){background:var(--sage);border-color:var(--green)}input[type=radio],input[type=checkbox]{accent-color:var(--green);width:18px;height:18px;flex-shrink:0}.quiz input[type=text]{width:min(100%,340px);padding:12px;border:1px solid #9fac99;border-radius:6px;background:var(--paper)}.quiz .check{margin-top:14px;font-size:14px}.feedback{font-size:15px;border-left:3px solid var(--green);padding-left:14px;margin-top:16px}.feedback.retry{border-color:var(--accent)}details{border-bottom:1px solid var(--line);margin-top:14px}summary{display:flex;justify-content:space-between;gap:20px;align-items:center;min-height:54px;padding-block:12px;cursor:pointer;list-style:none;font-weight:500}summary::-webkit-details-marker{display:none}summary>span{font-size:24px;font-weight:400}details[open] summary>span{transform:rotate(45deg)}.detail-body{padding:8px 0 22px;max-width:800px}.phrases{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:0}.phrases dt{font-weight:600}.phrases dd{margin:4px 0 0;color:var(--muted)}.grammar-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.rule{background:var(--sage);border-radius:10px;padding:24px}.rule h3{font-family:Lora,Georgia,serif;font-size:24px;margin:12px 0 20px}.rule p{margin-top:16px}.small{font-size:14px;color:var(--muted);line-height:1.6}.podcast{padding:26px;background:#eeeae0;border-radius:12px}.podcast h3{font:500 28px/1.3 Lora,Georgia,serif;margin:12px 0}.podcast p{max-width:740px}.podcast button{margin-block:20px}.podcast .small{margin-top:18px}audio{width:100%;margin-top:12px}.primary{display:inline-flex;justify-content:space-between;align-items:center;gap:24px;background:var(--green);color:white;border:0;padding:13px 19px;border-radius:7px;text-decoration:none;min-height:50px}.primary:hover{background:#45654e}.field-label{display:block;margin:24px 0 10px;font-weight:500}textarea{display:block;width:100%;resize:vertical;border:1px solid #9fac99;border-radius:8px;background:#fffefa;padding:18px;color:var(--ink);line-height:1.7}#word-count{margin-top:8px}.self-check{padding:24px;background:var(--sage);margin-top:24px;border-radius:10px}.self-check p{font-size:14px;color:var(--muted);margin-block:12px}.self-check label{display:flex;align-items:flex-start;gap:12px;padding-block:8px}.self-check input{margin-top:5px}.recording{margin-top:28px}.recording>p{margin-top:12px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}.final-actions{padding-top:24px;margin-top:24px;border-top:1px solid var(--line)}.result-summary{font-size:15px;margin-top:20px}.ending{background:var(--sage);padding:30px!important;border-radius:14px;margin-bottom:40px}.ending h2{margin:14px 0 20px}.ending>.primary{margin-block:24px 14px}footer{padding-block:20px 40px;font-size:14px;color:var(--muted)}footer p{margin-top:10px}.note{padding:20px;background:var(--sage)}@media(max-width:680px){body{font-size:16px}.shell{width:calc(100% - 32px)}.top{flex-direction:column;gap:5px}.intro{padding-top:32px}.lead{font-size:18px}.scenario-grid{grid-template-columns:1fr}.scenario{display:grid;grid-template-columns:42px 1fr;gap:4px 14px;padding:18px}.scenario .symbol{grid-row:1/3;font-size:32px;margin:0;align-self:center}.scenario strong{font-size:22px}.scenario small{margin:0}.section-top{grid-template-columns:26px 1fr;gap:12px}.grammar-grid,.phrases{grid-template-columns:1fr}.chat{padding:18px}.bubble{max-width:95%;padding:15px}.quiz{padding:18px;margin-inline:0;min-width:0}.options{flex-direction:column}.option{width:100%}.rule,.podcast,.self-check{padding:20px}.primary{max-width:100%;font-size:15px}.final-actions>*{width:100%}.ending{padding:24px 20px!important}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{.top,.steps,.actions,.check,.recording,.ending,#load-audio{display:none}section{break-inside:avoid}.shell{width:100%}body{font-size:11pt}}