:root{--ink:#1f3a39;--teal:#175a52;--muted:#637777;--mint:#e6f4e9;--peach:#fff2d9;--border:#dce7df;--paper:#f8f8f2;--white:#fff;--navy:#243e50}
*{box-sizing:border-box}body{background:var(--paper);font:15px/1.55 system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color:var(--ink);margin:0}button,select,textarea{font:inherit}button{cursor:pointer}a{color:#1b675b}button:focus-visible,a:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #e7ad53;outline-offset:3px}h1,h2,h3,p{margin-top:0}h1,h2{letter-spacing:-.03em}h1{font:500 clamp(1.8rem,4vw,2.7rem)/1.13 Georgia,serif}h2{font:500 clamp(1.35rem,2.5vw,1.85rem)/1.3 Georgia,serif}h3{font-size:1rem}small,.muted{color:var(--muted)}.site-top{background:white;border-bottom:1px solid var(--border)}.top-inner{max-width:1330px;margin:auto;display:flex;gap:18px;justify-content:space-between;align-items:center;min-height:75px;padding:11px 22px}.logo{display:flex;align-items:center;text-decoration:none;gap:9px;font-size:11px;letter-spacing:.11em;font-weight:900;color:var(--ink)}.logo img{width:51px;height:48px;object-fit:contain}.top-inner nav{display:flex;gap:13px;flex-wrap:wrap}.top-inner nav a{font-size:12px;text-decoration:none;font-weight:700}.notice{font-size:12px;color:#4a6d60;background:#eff8ec;padding:12px 22px;border-bottom:1px solid #d9ead7;text-align:center}.loading{padding:55px;text-align:center}.layout{max-width:1330px;margin:25px auto 60px;padding:0 22px}.welcome{border-radius:23px;background:linear-gradient(110deg,#144e4c,#287365 65%,#528c70);padding:28px 32px;color:white;display:flex;gap:18px;justify-content:space-between;align-items:center}.welcome h1{color:white;margin-bottom:11px}.welcome p{color:#eff7ee;font-size:14px;margin:0}.eyebrow{text-transform:uppercase;font-size:10px;letter-spacing:.16em;font-weight:850;color:#d7f0c2;margin-bottom:9px}.count{background:#ffffff22;padding:14px;border-radius:17px;text-align:center;white-space:nowrap;min-width:155px}.count b{font-size:28px;display:block}.count small{display:block;color:white}.controls{margin:18px 0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:11px}.control{display:grid;gap:5px;font-size:11px;font-weight:800;color:#466963}.control select{width:100%;min-width:0;border:1px solid #cbded4;border-radius:12px;background:#fff;padding:12px;color:var(--ink)}.work{display:grid;grid-template-columns:270px minmax(0,1fr);gap:18px;align-items:start}.sidebar,.content{background:white;border:1px solid var(--border);border-radius:20px;min-width:0}.sidebar{padding:18px;position:sticky;top:14px}.sidehead{display:flex;justify-content:space-between;align-items:center;gap:8px}.sidehead strong{font-size:14px}.pill{border-radius:25px;padding:4px 9px;background:#e7f2ec;font-size:10px;color:#266457;font-weight:800}.lesson-list{margin-top:10px;display:grid;gap:6px}.lesson-select{width:100%;border:1px solid transparent;background:transparent;padding:12px;border-radius:11px;text-align:left;display:flex;gap:8px;align-items:flex-start;color:var(--ink)}.lesson-select:hover{background:#f6faf5}.lesson-select.active{background:#eaf6ec;border-color:#bfdacc}.lesson-select .n{flex:0 0 24px;background:#f0f1e8;border-radius:8px;text-align:center;font-size:11px;padding:4px}.lesson-select .lt{font-size:12px;font-weight:750;line-height:1.35}.lesson-select .sub{font-size:10px;color:#7d8f89;display:block;margin-top:3px}.progress{margin-top:18px;background:#f5f9f5;border-radius:12px;padding:11px}.meter{height:9px;background:#dce9e1;border-radius:12px;overflow:hidden;margin-top:9px}.meter>i{display:block;height:100%;background:#347b67;border-radius:10px;transition:width .2s}.content{padding:25px 27px}.unitbar{display:flex;justify-content:space-between;gap:14px;align-items:center}.chip{font-size:10px;font-weight:800;color:#1e695a;background:#e8f5eb;padding:6px 11px;border-radius:20px}.goal{background:#f4f9f2;border:1px solid #dceadd;border-radius:14px;padding:17px 18px;margin:19px 0}.goal strong{font-size:12px}.goal p{margin:7px 0 0;font-size:13px}.unitnav{display:flex;gap:7px;overflow:auto;scrollbar-width:thin;padding:6px 0 14px;margin-bottom:17px;border-bottom:1px solid var(--border)}.tab{border:1px solid #dce4da;background:#fff;border-radius:25px;color:#46675d;font-size:11px;font-weight:750;padding:10px 13px;white-space:nowrap}.tab[aria-current=true]{background:#175a52;color:white;border-color:#175a52}.introtext{font-size:14px;color:#5f756d}.activity{min-height:300px}.activity h2{margin:0 0 9px}.index{font-size:11px;color:#568376;font-weight:850;letter-spacing:.12em;text-transform:uppercase}.twocol{display:grid;grid-template-columns:1fr 1fr;gap:13px}.card{border:1px solid var(--border);border-radius:16px;background:#fff;padding:17px}.card strong{display:block}.card p{font-size:13px;line-height:1.6;margin:7px 0 0}.card.cream{background:#fffaec;border-color:#f1e3bf}.card.green{background:#f1f9f3}.wordgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.word{border:1px solid #dce8df;border-radius:14px;padding:14px;min-height:118px;background:#fff}.word b{font-size:15px;color:#1e6658;display:block}.word .definition{display:block;font-size:12px;color:#4a6570;margin:6px 0}.word em{font-size:11px;color:#87928c;font-style:normal}.speak{border:0;border-radius:19px;background:#e7f1ed;color:#2f6559;padding:6px 10px;font-size:11px;font-weight:850}.phrase{background:#f7faf7;border:1px solid #ddebe1;border-radius:13px;padding:14px;margin:9px 0}.phrase p{margin:4px 0 7px;font-size:15px;font-weight:700}.phrase span{font-size:11px;color:#577a6e}.dialogue{display:grid;gap:13px}.bubble{max-width:83%;background:#edf6f0;border-radius:18px 18px 18px 4px;padding:13px 16px}.bubble:nth-child(even){background:#fff0dc;border-radius:18px 18px 4px 18px;margin-left:auto}.bubble b{font-size:10px;color:#507a67}.bubble p{font-size:14px;margin:6px 0 0}.localbox{border:1px solid #e4d4aa;background:#fffaf1;padding:15px;border-radius:15px;margin-top:17px}.localbox strong{font-size:14px}.localphrase{display:grid;gap:4px;border-bottom:1px solid #f1e7d8;padding:9px 0}.localphrase:last-child{border:0}.localphrase .native{font-size:19px;font-weight:800}.localphrase .reading{font-size:13px;color:#9a6426}.localphrase .meaning{font-size:12px;color:#4a6470}.answer{display:block;border:1px solid #cfddd4;border-radius:12px;padding:12px 13px;margin-top:9px;cursor:pointer;background:#fff}.answer:has(input:checked){border-color:#277668;background:#eaf7ec}.answer input{margin-right:8px}.results{padding:14px;background:#e9f5ed;border-radius:13px;margin:12px 0;color:#194f41;font-size:13px}.results.bad{background:#fff1de;color:#684a21}.buttons{display:flex;flex-wrap:wrap;gap:9px;align-items:center;margin-top:18px}.btn{border:0;border-radius:25px;padding:12px 18px;background:#175c52;color:white;font-size:12px;font-weight:800;text-decoration:none}.btn.light{background:#e8f4ed;color:#185647}.btn:disabled{opacity:.45;cursor:not-allowed}.sentence-pieces{display:flex;flex-wrap:wrap;gap:6px}.word-btn{border:1px solid #c7dbcf;background:#fff;border-radius:10px;padding:9px;font-size:13px}.chosen{background:#eaf5ef;border:1px dashed #9bbcab;border-radius:11px;padding:12px;min-height:56px;margin:10px 0}.quizitem{padding:16px 0;border-bottom:1px solid #e6ede6}.quizitem h3{font-size:13px;line-height:1.5}.badge{display:inline-block;background:#edf0e3;color:#517564;border-radius:10px;padding:3px 7px;margin:0 5px 4px 0;font-size:10px;font-weight:800}.quizfeedback{font-size:12px;color:#57796b;margin:8px 0;padding:8px 10px;background:#f2f8f2;border-radius:9px}.notice-inline{font-size:12px;color:#58756d;border-left:4px solid #c9dfd3;padding:8px 12px;background:#f7fbf7;margin:14px 0}.notes{width:100%;min-height:115px;border:1px solid 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@media(max-width:900px){.work{grid-template-columns:1fr}.sidebar{position:static}.lesson-list{grid-template-columns:repeat(2,minmax(0,1fr))}.controls{grid-template-columns:repeat(2,minmax(0,1fr))}.content{padding:22px}.welcome{padding:24px}}
@media(max-width:550px){.top-inner{padding:10px 14px;gap:10px;flex-wrap:wrap}.top-inner nav{gap:11px}.logo img{width:42px;height:40px}.logo{font-size:10px}.top-inner nav a{font-size:11px}.layout{margin:14px auto 30px;padding:0 11px}.welcome{padding:22px;display:block}.welcome .count{display:inline-block;margin-top:17px;min-width:0}.controls{gap:8px;margin:14px 0}.control select{padding:11px 9px;font-size:12px}.sidebar,.content{border-radius:15px}.sidebar{padding:12px}.lesson-list{grid-template-columns:1fr 1fr;gap:4px}.lesson-select{padding:9px 7px}.lesson-select .lt{font-size:11px}.lesson-select .n{font-size:10px}.content{padding:16px 13px}.twocol,.wordgrid{grid-template-columns:1fr}.bubble{max-width:94%}.unitbar{display:block}.chip{display:inline-block;margin-top:9px}.notice{font-size:11px;padding:10px}.foot{padding:18px 13px}.activity{min-height:220px}}
@media(max-width:360px){.lesson-list{grid-template-columns:1fr}.top-inner nav a{font-size:10px}.welcome h1{font-size:1.7rem}.control select{font-size:11px;padding:10px 7px}.tab{padding:9px 11px}}
@media(prefers-reduced-motion:reduce){.meter>i{transition:none}}