@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=Prata&display=swap');
:root{--bg:#f8f5ee;--paper:#fffdf8;--ink:#342c25;--muted:#756c60;--gold:#aa7642;--line:#e6ddd0;--green:#3f6552;--red:#a04434}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Manrope,Arial,sans-serif;font-size:17px;line-height:1.75}button,input,select,textarea{font:inherit}button,a,select{touch-action:manipulation}button{cursor:pointer;border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:9px;padding:10px 18px;font-weight:600}button:hover{border-color:var(--gold);background:#f1e8da}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #bb884a;outline-offset:4px}button.primary,.primary{background:var(--ink);color:white;border-color:var(--ink)}button.primary:hover{background:#5b4532}.gold{color:var(--gold)}a{color:inherit;text-decoration:none}p{margin:0 0 1.1em}h1,h2,h3{line-height:1.22;font-weight:500;margin:0 0 .6em}h1,h2{font-family:Prata,Georgia,serif}h1{font-size:clamp(40px,4.9vw,76px);letter-spacing:-2px}h2{font-size:clamp(29px,3.2vw,46px);letter-spacing:-1px}h3{font-size:23px;font-weight:700}small{font-size:13px}#sidebar{width:255px;position:fixed;inset:0 auto 0 0;background:#f0eadd;border-right:1px solid var(--line);padding:32px 23px;display:flex;flex-direction:column;z-index:20}.brand{display:flex;gap:12px;align-items:center;font-family:Georgia,serif;font-size:17px;line-height:1.3;letter-spacing:1px}.brand small{font-size:11px;letter-spacing:0}.brandMark{border:1px solid var(--gold);width:48px;height:48px;display:flex;align-items:center;justify-content:center;font-size:31px;color:var(--gold);border-radius:50%}.brandMark span{font-size:22px;font-style:italic;margin-top:15px;margin-left:-4px}.sideLabel{font-size:9px;letter-spacing:1.3px;margin:37px 0 18px;color:var(--muted)}nav a{display:flex;align-items:center;gap:12px;padding:12px 10px;border-radius:7px;font-size:14px;margin:3px 0}nav a.active{background:#e4d7c1;font-weight:800}nav a span{font-size:18px;width:23px;color:var(--gold)}.sideBottom{margin-top:auto;font-size:11px;color:var(--muted)}.progress{height:4px;background:#ded5c7;border-radius:5px;overflow:hidden;margin:12px 0 5px}.progress span{display:block;height:100%;background:var(--gold);transition:width .4s}.author{font-weight:700;color:var(--ink);margin-top:30px}.author span{font-size:10px;font-weight:400}main{margin-left:255px;min-height:100vh}.mobileBar{display:none}.wrap{max-width:1230px;margin:auto;padding:45px 55px 70px}.eyebrow{font-size:11px;font-weight:800;letter-spacing:2.1px;text-transform:uppercase;color:var(--gold);margin-bottom:20px}.topline{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:19px;margin-bottom:36px;font-size:12px;color:var(--muted)}.pill{border:1px solid #d7c3a5;background:#f3eadb;color:#88603d;border-radius:50px;padding:5px 12px;font-size:11px;letter-spacing:.4px;font-weight:800}.hero{display:grid;grid-template-columns:1.05fr 1fr;align-items:center;gap:36px;margin-bottom:45px}.hero h1 em{font-style:normal;color:var(--gold)}.hero p{color:var(--muted);font-size:18px;max-width:460px}.hero figure{margin:0;position:relative}.hero img{display:block;width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:90px 90px 12px 12px}.heroCaption{position:absolute;bottom:20px;left:-20px;right:20px;background:#fffdf4ed;padding:18px 20px;border:1px solid #eee5d3;box-shadow:0 8px 40px #2e251510;border-radius:8px}.heroCaption strong{font-family:Georgia,serif;font-size:25px;display:block}.heroCaption small{color:var(--muted)}.actions{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:23px 0;margin:40px 0}.stat{border-right:1px solid var(--line);padding:0 24px}.stat:first-child{padding-left:0}.stat:last-child{border:0}.stat strong{display:block;font-family:Georgia,serif;font-size:34px;color:var(--gold)}.stat span{font-size:12px;color:var(--muted)}.sectionHead{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-top:45px;margin-bottom:24px}.sectionHead p{font-size:13px;color:var(--muted);margin:0}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{display:block;background:var(--paper);border:1px solid var(--line);padding:25px;border-radius:12px}.card:hover{border-color:#c5a67c}.card .number{color:var(--gold);font-family:Georgia,serif;font-size:28px;margin-bottom:18px}.card h3{font-size:19px}.card p{font-size:14px;color:var(--muted)}.card .arrow{font-size:25px;color:var(--gold)}.note{border-left:3px solid var(--gold);background:#efe6d7;padding:20px 24px;margin:25px 0;font-size:16px}.note small{display:block}.notice{font-size:13px;color:var(--muted);padding:15px 0;border-top:1px solid var(--line)}.courseLayout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:34px}.toc{border-right:1px solid var(--line);padding-right:20px}.toc a{display:block;font-size:12px;line-height:1.5;padding:10px 9px;border-radius:7px}.toc a.active{background:#eadeca;font-weight:800}.toc .part{font-size:10px;letter-spacing:1px;color:var(--gold);font-weight:800;margin:19px 0 8px}.lesson h1{font-size:clamp(32px,3.5vw,50px);letter-spacing:-1px}.rule{margin:26px 0;border:1px solid var(--line);border-radius:12px;background:var(--paper);padding:27px}.rule .frRule{font-family:Georgia,serif;font-size:23px;line-height:1.5;margin-bottom:20px}.lang{font:700 10px Manrope,Arial,sans-serif;letter-spacing:1.7px;color:var(--gold);display:block;margin-bottom:10px}.formula{border:1px solid #d1b790;padding:22px;text-align:center;background:#f0e4cf;border-radius:9px;font-weight:800;color:#654529;line-height:1.9;margin:25px 0;font-size:16px}.examples{display:grid;grid-template-columns:1fr 1fr;gap:16px}.example{background:var(--paper);border:1px solid var(--line);border-radius:11px;overflow:hidden}.example img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}.exampleBody{padding:20px}.fr{font-family:Georgia,serif;font-size:24px;line-height:1.5}.ru{font-size:15px;color:var(--muted);margin-top:8px}.example .speak{float:right;margin-left:6px}.speak{padding:5px 10px;font-size:15px;font-weight:500}.aux{color:#976122;font-weight:800;background:#f2e2c7;border-radius:3px;padding:1px 3px}.inf{color:#37624f;text-decoration:underline;text-decoration-color:#a7c5b2;text-underline-offset:5px}.lessonFooter{display:flex;gap:10px;justify-content:space-between;flex-wrap:wrap;margin:35px 0}.timeline{display:flex;gap:8px;align-items:center;margin:30px 0}.timeline span{flex:1;text-align:center;font-size:12px;border-bottom:2px solid var(--line);padding:15px 0}.timeline .now{border-color:var(--gold);color:var(--gold);font-weight:800}.timeline .future{border-color:var(--green)}.scenePhoto{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:13px;margin:22px 0}.sentence{padding:20px 0;border-bottom:1px solid var(--line)}.sentence button.text{display:block;text-align:left;border:0;background:none;padding:0;width:100%;font-family:Georgia,serif;font-size:25px;font-weight:400;line-height:1.7}.scheme{font-size:13px;padding:15px;background:#f1e6d2;margin-top:12px;border-radius:7px}.controls{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin:24px 0}.controls label{font-size:14px}.controls select{max-width:100%}.sceneNav{display:flex;gap:7px;flex-wrap:wrap}.sceneNav a{border:1px solid var(--line);padding:7px 13px;border-radius:5px;font-size:13px}.sceneNav a.active{background:var(--ink);color:white}.question{border:1px solid var(--line);border-radius:12px;background:var(--paper);padding:24px;margin:18px 0}.question .qnum{font-size:10px;color:var(--gold);font-weight:800;letter-spacing:1px;margin-bottom:14px}.question input[type=text],textarea{width:100%;border:1px solid #cbbb9f;background:#fffefa;border-radius:7px;padding:12px 15px;margin:17px 0 5px;color:var(--ink);min-width:0}.question .actions{margin:13px 0 0}.question button{font-size:13px;padding:8px 13px}.feedback{margin-top:17px;padding:15px 18px;background:#f2eee5;border-radius:7px;font-size:14px}.feedback.good{background:#e9f0e8;color:#315a41}.feedback.review{background:#f6e8dc;color:#774d29}.feedback .answer{font-family:Georgia,serif;font-size:20px;margin:8px 0}.options{display:grid;gap:9px;margin-top:20px}.option{border:1px solid var(--line);border-radius:7px;padding:12px;display:flex;gap:12px;align-items:start}.option input{margin-top:7px}.option:has(input:checked){background:#eee3d0;border-color:var(--gold)}.option small{display:block;color:var(--muted)}.lab{display:grid;grid-template-columns:1fr 1fr;gap:18px;background:var(--paper);padding:30px;border:1px solid var(--line);border-radius:13px;margin:30px 0}.field label{display:block;font-size:12px;color:var(--muted);font-weight:800;margin-bottom:9px}select{width:100%;border:1px solid #cbbb9f;border-radius:7px;padding:11px;background:var(--paper);color:var(--ink)}.labOutput{grid-column:1/-1;background:#eee2cd;border-radius:10px;padding:30px;margin-top:10px}.labOutput .fr{font-size:32px}.tokens{display:flex;gap:9px;flex-wrap:wrap;min-height:55px;padding:16px;border:1px dashed #c0a781;border-radius:8px;margin:13px 0}.tokens button{font-size:18px}.result{padding:28px;background:#eae1cf;border-radius:12px;margin:25px 0}.result strong{font-size:36px;font-family:Georgia,serif}.glossary{columns:2;column-gap:35px}.glossary p{break-inside:avoid;border-bottom:1px solid var(--line);padding-bottom:8px;font-size:15px}.muted{color:var(--muted)}.pagination{display:flex;justify-content:space-between;gap:10px;margin:28px 0}.skip{position:fixed;top:-80px;left:20px;background:white;z-index:100;padding:12px}.skip:focus{top:10px}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:white;border-radius:9px;padding:12px 22px;font-size:14px;display:none;z-index:80}.search{width:100%;padding:12px 16px;border:1px solid var(--line);border-radius:8px;background:var(--paper);margin:15px 0 25px}.footer{border-top:1px solid var(--line);margin-top:55px;padding-top:22px;font-size:11px;color:var(--muted);display:flex;justify-content:space-between;gap:20px}.accordion{border-bottom:1px solid var(--line);padding:14px 0}summary{cursor:pointer;font-weight:700}details p{margin-top:15px}button:disabled{opacity:.4;cursor:default}.readingHint{font-size:12px;color:var(--muted)}.selfcheck label{display:block;margin:10px 0;font-size:15px}.testGrid{display:flex;flex-wrap:wrap;gap:6px}.testGrid a{width:34px;text-align:center;padding:4px;border:1px solid var(--line);border-radius:4px;font-size:12px}.testGrid a.answered{background:#e5ebdd}.testGrid a.active{background:var(--ink);color:white}
@media(min-width:1450px){.wrap{padding-left:70px;padding-right:70px}}@media(max-width:1150px){#sidebar{width:215px;padding:25px 17px}main{margin-left:215px}.wrap{padding:35px 30px}.hero{gap:25px}.hero h1{font-size:51px}.grid{grid-template-columns:repeat(2,1fr)}.courseLayout{grid-template-columns:185px minmax(0,1fr);gap:22px}.examples{grid-template-columns:1fr}}@media(max-width:800px){#sidebar{transform:translateX(-100%);transition:.2s;width:260px;padding-top:75px}#sidebar.open{transform:translateX(0);box-shadow:8px 0 50px #352b2925}.mobileBar{display:flex;position:sticky;top:0;z-index:25;background:#f0eaddf5;justify-content:space-between;align-items:center;padding:12px 20px;border-bottom:1px solid var(--line);font-size:13px;font-weight:800}.mobileBar button{padding:3px 10px;font-size:21px}main{margin-left:0}.wrap{padding:25px 22px 50px}.hero{grid-template-columns:1fr}.hero h1{font-size:57px}.hero figure{margin:10px 8px}.hero img{aspect-ratio:16/10;border-radius:40px 40px 10px 10px}.heroCaption{left:-8px}.hero p{max-width:100%}.topline{margin-bottom:25px}.courseLayout{display:block}.toc{display:none}.lesson h1{font-size:36px}.stats{grid-template-columns:repeat(2,1fr);gap:20px}.stat:nth-child(3){padding-left:0}.stat:nth-child(2){border:0}.grid{gap:12px}.card{padding:20px}.lab{padding:20px}.fr{font-size:23px}.glossary{columns:1}.labOutput{padding:22px}.labOutput .fr{font-size:27px}.sectionHead{align-items:start;flex-direction:column;gap:8px}}@media(max-width:480px){.grid,.lab{grid-template-columns:1fr}.hero h1{font-size:49px}.card .number{margin-bottom:8px}.card{padding:22px}.labOutput{grid-column:1}.question{padding:20px}.sentence button.text{font-size:23px}.rule{padding:22px}.controls select{font-size:14px}.actions button{flex-grow:1}.footer{display:block}.topline{font-size:10px}.eyebrow{font-size:10px}.sceneNav a{padding:6px 10px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

.hero img,.scenePhoto,.example img{height:auto}
.toc{position:sticky;top:25px;max-height:calc(100vh - 50px);overflow:auto;align-self:start;scrollbar-width:thin}.tableWrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px;margin:25px 0}.conj{border-collapse:collapse;width:100%;font-size:15px;background:var(--paper)}.conj td,.conj th{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line)}.conj th{background:#eee4d3;color:#765431;font-size:11px;letter-spacing:1px}.conj td:nth-child(2){font-weight:800;color:var(--gold)}.conj td .ru{font-size:13px}.conj td .fr{font-size:21px}.conj td .speak{float:right}.conj tr:last-child td{border-bottom:0}

.formulaBlocks{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:20px 0}.formulaBlocks button{background:#f4ead9;padding:20px 8px;border-color:#ceb388}.formulaBlocks small{display:block;font-size:9px;color:var(--muted);letter-spacing:1px}.formulaBlocks b{display:block;font-size:clamp(13px,1.6vw,22px);padding-top:10px;color:var(--gold)}.labOutput .aux{animation:verbPulse .35s ease-out}@keyframes verbPulse{from{background:#d0a76c}to{background:#f2e2c7}}

/* Original author artwork stays intact; contact is live HTML. */
.sev-banner{position:relative;margin-left:255px;background:#f6efdf;border-bottom:1px solid #d6bc87;isolation:isolate}
.sev-banner>img{display:block;width:100%;height:auto;object-fit:contain}
.sev-contact{position:absolute;top:80%;left:29%;width:42%;text-align:center;line-height:1.4}
.sev-contact>a{display:inline-block;color:#173956;font-family:Georgia,serif;font-size:clamp(12px,1.35vw,24px);text-decoration:underline;text-decoration-color:#b88b4d;text-underline-offset:4px;padding:3px 6px;border-radius:3px}
.sev-contact>a:hover{color:#8a5715;background:#fff8e8}
.sev-mobile-motto{display:none}
@media(max-width:1150px){.sev-banner{margin-left:215px}}
@media(max-width:800px){.sev-banner{margin-left:0}.sev-contact{position:static;width:auto;padding:14px 16px 17px;background:linear-gradient(110deg,#f6eddd,#fffaf0,#f1e4ce)}.sev-contact>a{font-size:18px;padding:7px 10px}.sev-mobile-motto{display:block;font-family:Georgia,serif;font-size:clamp(15px,3.7vw,21px);line-height:1.5;color:#173956;margin:0 0 8px}.sev-mobile-motto[lang=ru]{font-size:clamp(14px,3.5vw,19px);color:#506b7c}}