@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--ink:#203d37;--muted:#68736b;--paper:#f6f5ef;--line:#dcded4;--lime:#d6ed88}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',Arial,sans-serif}header,main{max-width:1160px;margin:auto}header{height:100px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}a{color:inherit}.brand{text-decoration:none;font-size:28px;font-weight:700;display:flex;align-items:center;gap:10px}.by{font-size:13px;font-weight:400;color:var(--muted)}.mark{background:var(--ink);color:var(--lime);border-radius:12px;width:37px;height:37px;text-align:center;font-style:italic}button,select,textarea{font:inherit}button{cursor:pointer;border:1px solid var(--line);background:transparent;color:var(--ink);border-radius:9px;padding:12px 18px}button:hover{background:#e7eadc}button:focus-visible,a:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #558763;outline-offset:3px}button[aria-pressed=true]{background:var(--ink);color:white;border-color:var(--ink)}.languages{display:flex;gap:6px}.languages button{padding:8px 12px;font-size:12px}main{padding-top:43px}.eyebrow{font-size:11px;letter-spacing:2px;text-transform:uppercase;font-weight:700;color:#61725b}.hero{display:grid;grid-template-columns:1fr 330px;align-items:center;padding:18px 0 40px;gap:40px}h1{font-family:Manrope,Arial,sans-serif;font-size:60px;line-height:1.09;letter-spacing:-3px;margin:0 0 22px;max-width:700px;font-weight:500}h1 em{font-style:normal;color:#7a9156}p{line-height:1.7;color:var(--muted)}.hero p{max-width:540px;font-size:16px;margin:0}.voice{height:190px;border-radius:100px;background:#e9edde;display:flex;justify-content:center;align-items:center;gap:9px;transform:rotate(-5deg)}.voice i{width:9px;height:25px;background:#789064;border-radius:10px}.voice i:nth-child(3n){height:85px}.voice i:nth-child(3n+1){height:48px}.voice i:nth-child(5n){height:125px;background:var(--ink)}nav{display:flex;border-bottom:1px solid var(--line);gap:30px}nav button{border:0;border-radius:0;padding:19px 0;font-weight:600;color:var(--muted)}nav button[aria-pressed=true]{background:none;color:var(--ink);box-shadow:0 3px var(--ink)}.sectionbar{display:flex;align-items:center;justify-content:space-between;margin:35px 0 23px;gap:15px}h2{font-family:Manrope,Arial,sans-serif;font-size:26px;letter-spacing:-.7px;margin:8px 0}.modes{display:flex;background:#e8eadd;padding:4px;border-radius:12px;gap:4px}.modes button{padding:9px 23px;border:0}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.card{border:1px solid var(--line);border-radius:16px;padding:26px;background:#fffef9}.card .num{font-size:12px;color:#879474}.card h3{font-size:21px;line-height:1.3;margin:24px 0 10px;font-weight:500;letter-spacing:-.4px}.card p{font-size:14px;margin:12px 0}.formula{background:#eef1e5;padding:14px;border-radius:8px;font-weight:600;font-size:13px;line-height:1.7}.source{font-size:11px;display:block;margin-top:20px;color:#677659}.ribbon{display:flex;justify-content:space-between;gap:20px;align-items:center;background:var(--ink);border-radius:16px;color:white;padding:25px 30px;margin-top:20px}.ribbon p{color:#d0dbca;font-size:14px;margin:5px 0 0}.primary{background:var(--lime);border-color:var(--lime);font-weight:600}.primary:hover{background:#c9df7e}.trainer{display:grid;grid-template-columns:1fr 320px;gap:20px}.panel{background:#fffef9;border:1px solid var(--line);border-radius:16px;padding:28px}label{display:block;font-size:13px;font-weight:600;margin-bottom:10px}select,textarea{width:100%;padding:12px;border:1px solid var(--line);border-radius:8px;color:var(--ink);background:white}textarea{min-height:145px;resize:vertical;line-height:1.6}.prompt{font-size:21px;line-height:1.5;margin:23px 0 12px}.hint{font-size:13px;color:var(--muted);line-height:1.6}.timer{font-family:Manrope,Arial,sans-serif;font-size:58px;letter-spacing:-3px;margin:16px 0}.actions{display:flex;gap:8px;flex-wrap:wrap;margin:15px 0}details{margin:20px 0;font-size:14px;line-height:1.7}summary{cursor:pointer;font-weight:600}.check{display:flex;gap:9px;align-items:flex-start;margin:16px 0;line-height:1.5;font-weight:400}.check input{accent-color:var(--ink);margin-top:4px}.notice{font-size:13px;line-height:1.6;min-height:22px}footer{display:flex;justify-content:space-between;gap:20px;padding:30px 0;font-size:11px;color:var(--muted);border-top:1px solid var(--line);margin-top:35px}audio{width:100%;margin-top:10px}@media(max-width:1220px){header,main{margin-left:30px;margin-right:30px}}@media(max-width:760px){header{height:80px}.by{display:none}main{padding-top:30px}h1{font-size:43px;letter-spacing:-2px}.hero{grid-template-columns:1fr;gap:20px}.voice{display:none}nav{gap:18px}nav button{font-size:13px}.grid,.trainer{grid-template-columns:1fr}.sectionbar{align-items:flex-start;flex-direction:column}.ribbon{align-items:flex-start;flex-direction:column}footer{flex-direction:column}header,main{margin-left:20px;margin-right:20px}.card h3{margin-top:16px}}

.languages svg{width:23px;height:16px;vertical-align:middle;margin-right:4px}button:disabled{opacity:.55;cursor:default}
.course-intro{display:flex;align-items:center;justify-content:space-between;gap:28px;margin:24px 0}.course-intro h3{font-size:23px;margin:0 0 10px}.course-intro p{max-width:780px;margin:0}.lesson-count{white-space:nowrap;border:1px solid var(--line);border-radius:30px;padding:10px 18px;font-size:13px}.lesson-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.lesson-card{display:flex;flex-direction:column;align-items:flex-start;text-align:left;padding:22px;min-height:160px;gap:15px;background:#fffef9;border-radius:14px}.lesson-card strong{font-size:18px;font-weight:600;line-height:1.45}.lesson-card>span:last-child{margin-top:auto;font-size:12px}.lesson-card[aria-pressed=true] .eyebrow{color:var(--lime)}.lesson-body{background:#fffef9;border:1px solid var(--line);border-radius:18px;padding:40px;margin-top:25px;scroll-margin-top:20px}.lesson-body h2{font-size:32px;margin:17px 0}.lesson-body h3{margin-top:28px}.lesson-body h4{margin:0 0 10px}.lesson-body p{margin:8px 0 16px}.lesson-idea{font-size:17px;max-width:none}.lesson-steps{padding-left:24px;line-height:1.8}.lesson-steps li{padding:5px 0 5px 8px}.example-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:26px 0}.example-grid section{background:#f3eee8;border-radius:12px;padding:24px;display:flex;flex-direction:column}.example-grid section:last-child{background:#eaf0dd}.example-grid p{margin-bottom:0}.trap{border-left:3px solid #a28e59;padding:12px 22px;margin:25px 0;background:#f7f3e9}.try-it{background:#f0f3e8;border-radius:12px;padding:25px}.try-it h3{margin-top:0}.try-it ul{padding-left:22px;line-height:1.9}.lesson-controls{display:flex;justify-content:space-between;gap:12px;margin-top:24px;flex-wrap:wrap}.practice-plan{padding:25px 30px;margin:24px 0;border:1px solid var(--line);border-radius:14px}.practice-plan ol{line-height:1.9;padding-left:22px}.references{padding:20px;border-top:1px solid var(--line)}.references a{display:block;margin:12px 0}.route-actions{display:flex;gap:12px;flex-wrap:wrap;flex-shrink:0}.ribbon{flex-wrap:wrap}.ribbon>div:first-child{flex:1;min-width:220px}.ribbon .primary{white-space:normal}.card{display:flex;flex-direction:column}.card .source{margin-top:auto;padding-top:20px}.card h3{min-height:2.6em}.card .formula{margin-top:auto}p,.lesson-steps li,.practice-plan li,.try-it li{text-align:justify;hyphens:auto;overflow-wrap:break-word}.hero p,.ribbon p,.notice{text-align:left}.panel,.lesson-body,.lesson-card{min-width:0}select{max-width:100%}.trainer details{overflow-wrap:anywhere}.trainer ol{padding-left:20px;line-height:1.8}.trainer .formula{font-weight:400}.trainer .formula::first-line{font-weight:600}
@media(max-width:900px){.lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.trainer{grid-template-columns:minmax(0,1fr) 280px}}@media(max-width:760px){.course-intro{align-items:flex-start;flex-direction:column}.lesson-body{padding:24px}.lesson-body h2{font-size:25px}.example-grid{grid-template-columns:1fr}.trainer{grid-template-columns:minmax(0,1fr)}.route-actions{width:100%;flex-shrink:1}.route-actions button{flex:1;min-width:0}.lesson-controls button{width:100%}.try-it{padding:18px}.try-it button{width:100%}.practice-plan{padding:20px}.lesson-steps li{padding-left:0}.lesson-card{padding:18px}}@media(max-width:440px){.lesson-grid{grid-template-columns:1fr}.lesson-card{min-height:130px}.lesson-body{padding:19px}.example-grid section{padding:18px}}

.example-grid>section{min-width:0}.example-grid p{overflow-wrap:anywhere}

.brand .mark{display:block;flex-shrink:0;width:37px;height:37px;background:transparent;border-radius:0}
.mistake-table{margin:28px 0}.mistake-table table{width:100%;border-collapse:separate;border-spacing:0;table-layout:fixed;border:1px solid var(--line);border-radius:12px;overflow:hidden}.mistake-table caption{text-align:left;font-size:19px;font-weight:600;margin:0 0 14px}.mistake-table th,.mistake-table td{width:50%;padding:20px;vertical-align:top;text-align:left;line-height:1.6;overflow-wrap:anywhere}.mistake-table th:first-child,.mistake-table td:first-child{background:#f3eee8}.mistake-table th:last-child,.mistake-table td:last-child{background:#eaf0dd}.mistake-table th{font-size:17px}.mistake-table td{border-top:1px solid var(--line)}.mistake-table td strong{font-weight:500}.mistake-table td p{font-size:13px;line-height:1.65;margin:10px 0 0;text-align:left}.lesson-grid .lesson-card:last-child:nth-child(3n+1){grid-column:1/-1;min-height:120px}@media(max-width:600px){.mistake-table th,.mistake-table td{padding:12px 10px;font-size:14px}.mistake-table th{font-size:14px}.mistake-table td p{font-size:12px}}@media(max-width:900px) and (min-width:441px){.lesson-grid .lesson-card:last-child{grid-column:1/-1}}