:root{--ink:#153d39;--text:#253c3b;--muted:#536664;--paper:#f6f8f7;--white:#fff;--lime:#e5f889;--blue:#e9efff;--line:#d4dfdc;--red:#9d3434;--green:#176047;--shadow:0 9px 28px #153d3909}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);font:17px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text)}button,input,select,textarea{font:inherit}button,a,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}a{color:var(--ink)}button{cursor:pointer}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #437ddd;outline-offset:4px}.skip{position:fixed;top:-70px;left:16px;z-index:10;background:#fff;padding:12px}.skip:focus{top:8px}.topbar{height:96px;display:flex;align-items:center;gap:25px;padding:0 4%;border-bottom:1px solid var(--line);background:#fff}.brand{display:flex;align-items:center;gap:13px;text-decoration:none;font-weight:750;line-height:1.2;font-size:21px}.brand-mark{font:italic bold 32px Georgia,serif;background:var(--ink);color:var(--lime);width:49px;height:49px;display:grid;place-items:center;border-radius:12px}.brand small{display:block;letter-spacing:.1em;font-size:11px;margin-top:7px;color:var(--muted);font-weight:600}.top-note{margin-left:auto;color:var(--muted);font-size:14px}.quiet{background:white;border:1px solid var(--line);border-radius:8px;padding:9px 15px;font-size:14px;color:var(--ink)}.layout{max-width:1500px;margin:0 auto;display:grid;grid-template-columns:246px minmax(0,1fr);min-height:80vh}aside{padding:32px 22px;border-right:1px solid var(--line)}.eyebrow{font-size:12px;letter-spacing:.15em;font-weight:750;color:var(--muted);margin:0 0 15px}nav{display:grid;gap:6px}nav a{display:flex;align-items:center;gap:12px;text-decoration:none;padding:11px 12px;border-radius:9px;font-size:15px;line-height:1.35}nav a:hover{background:#e7eeeb}nav a[aria-current=page]{background:var(--ink);color:#fff}nav .num{font-size:12px;opacity:.75}.side-note{margin-top:35px;padding:18px 14px;border-top:2px solid var(--line);font-size:14px}.side-note p{margin-bottom:0;color:var(--muted)}main{padding:38px clamp(22px,4vw,64px) 65px;min-width:0}h1,h2,h3{color:var(--ink);line-height:1.2}h1{font:normal clamp(34px,4vw,52px)/1.08 Georgia,serif;margin:0 0 18px;letter-spacing:-.03em}h2{font-size:25px;margin:32px 0 16px;letter-spacing:-.02em}h3{font-size:19px;margin:0 0 10px}p{margin:0 0 16px}.lead{font-size:18px;max-width:740px;color:var(--muted);margin-bottom:28px}.hero{display:grid;grid-template-columns:1.2fr .9fr;gap:32px;align-items:center;background:var(--ink);color:#fff;padding:32px;border-radius:16px;margin-bottom:28px}.hero h2{color:#fff;font:normal 33px/1.12 Georgia,serif;margin:8px 0 16px}.hero .eyebrow{color:var(--lime)}.hero p{color:#e2ece8}.hero-example{background:#fff;color:var(--ink);padding:23px;border-radius:10px;transform:rotate(1deg);font-family:Georgia,serif;font-size:20px;box-shadow:7px 7px 0 #e5f889}.hero-example small{display:block;font:600 12px -apple-system,sans-serif;letter-spacing:.1em;margin-bottom:10px;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.card{background:#fff;border:1px solid var(--line);padding:24px;border-radius:12px;box-shadow:var(--shadow);min-width:0}.card p:last-child{margin-bottom:0}.card-link{display:block;text-decoration:none;transition:transform .15s,border-color .15s}.card-link:hover{transform:translateY(-3px);border-color:var(--ink)}.card-link .label{margin-bottom:14px}.label{display:inline-block;font-size:12px;letter-spacing:.07em;font-weight:750;color:var(--ink);background:#eef3f0;border-radius:5px;padding:3px 8px}.label.lime{background:var(--lime)}.label.blue{background:var(--blue)}.card-link p{color:var(--muted);font-size:15px}.lesson-head{display:flex;justify-content:space-between;align-items:center;gap:15px}.tabs{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 24px}.pill{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:100px;padding:9px 17px;font-size:15px;min-height:44px}.pill[aria-pressed=true]{background:var(--ink);color:#fff;border-color:var(--ink)}.example{background:#eff5f1;border-left:4px solid #46816b;padding:20px 22px;margin:15px 0;white-space:pre-line;font-family:Georgia,serif;font-size:20px;line-height:1.65;overflow-wrap:anywhere}.example.blue{background:#eef2ff;border-color:#5b6eae}.example.plain{background:#f4f5f5;border-color:#96a5a1}.example p{margin:0 0 16px}.example p:last-child{margin:0}.caption{font-size:14px;color:var(--muted)}.notice{background:#edf2ff;border:1px solid #c8d4f1;border-radius:9px;padding:17px 21px;margin:20px 0}.notice.lime{background:#f2f8da;border-color:#d4e79a}.notice b{color:var(--ink)}.steps{counter-reset:steps;list-style:none;padding:0}.steps li{padding:12px 0 12px 44px;position:relative;border-bottom:1px solid var(--line)}.steps li:before{counter-increment:steps;content:counter(steps);position:absolute;left:0;top:13px;background:var(--ink);color:#fff;width:28px;height:28px;display:grid;place-items:center;border-radius:50%;font-size:14px}.quiz{margin:22px 0;padding:24px;border:1px solid var(--line);border-radius:12px;background:#fff}.quiz h3{margin-bottom:15px}.options{display:grid;gap:9px}.option{width:100%;text-align:left;padding:13px 17px;border:1px solid var(--line);border-radius:8px;background:#fafcfb;color:var(--text);line-height:1.5}.option:hover:not(:disabled){border-color:var(--ink);background:#eef4ef}.option.correct{border-color:#438c66;background:#edf8ef}.option.wrong{border-color:#ba6262;background:#fff1f0}.feedback{margin-top:13px;padding:14px 17px;border-radius:8px;background:#eef3ff}.feedback:empty{display:none}.feedback.good{background:#edf8ef}.feedback.bad{background:#fff1f0}.primary{background:var(--ink);border:1px solid var(--ink);color:#fff;border-radius:8px;padding:11px 18px;font-size:15px;display:inline-block;text-decoration:none}.primary:hover{background:#23514b}.secondary{border:1px solid var(--ink);background:#fff;color:var(--ink);border-radius:8px;padding:10px 17px;font-size:15px}.hero .primary{background:var(--lime);color:var(--ink);border:0}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}details{border:1px solid var(--line);border-radius:9px;background:#fff;margin:12px 0}summary{padding:16px 20px;cursor:pointer;font-weight:650;color:var(--ink)}details>div{padding:0 20px 20px}details[open] summary{border-bottom:1px solid var(--line);margin-bottom:16px}label{display:block;font-size:15px;font-weight:650;margin-bottom:6px}input:not([type=checkbox]),select,textarea{width:100%;border:1px solid #aebfba;border-radius:8px;background:#fff;padding:11px 13px;color:var(--text)}textarea{min-height:145px;resize:vertical;font-weight:400;font-size:16px}.field{margin:15px 0}.controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.controls .field{margin:0}.emphasis{background:var(--lime);color:var(--ink);padding:0 3px}.word-bank{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.word{border-radius:6px;border:1px solid var(--line);background:#fff;padding:7px 12px;font-size:16px}.comparison{display:grid;grid-template-columns:1fr 1fr;gap:18px}.checklist{list-style:none;padding:0}.checklist li{border-bottom:1px solid var(--line)}.checklist label{display:flex;gap:13px;align-items:flex-start;padding:13px 0;font-weight:400;font-size:17px}.checklist input{width:20px;height:20px;margin-top:5px;accent-color:var(--ink);flex:none}.checklist input:checked+span{color:var(--muted);text-decoration:line-through}.meter{height:9px;background:#dbe5e0;border-radius:9px;margin:15px 0}.meter span{display:block;height:100%;background:#437d5e;border-radius:9px;transition:width .2s}.rule-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.rule-grid .card{padding:20px}.rule-grid .example{font-size:18px;padding:15px}.quote-lines p{margin:0 0 15px}ul,ol{padding-left:23px}li{margin:7px 0}footer{border-top:1px solid var(--line);padding:24px 4%;font-size:14px;color:var(--muted);display:flex;justify-content:space-between;gap:16px}footer span{font-size:12px}.small{font-size:14px}.pill-row{display:flex;gap:8px;flex-wrap:wrap}.muted{color:var(--muted)}.score{font-size:15px;font-weight:700}.back-top{display:block;margin-top:35px}.divider{border:0;border-top:1px solid var(--line);margin:28px 0}
@media(max-width:1050px){.grid.three{grid-template-columns:1fr 1fr}.hero{grid-template-columns:1fr}.hero-example{transform:none}.layout{grid-template-columns:218px 1fr}.top-note{display:none}.topbar .quiet{margin-left:auto}}
@media(max-width:760px){.topbar{padding:15px 18px;height:auto}.brand{font-size:18px}.brand small{font-size:10px}.brand-mark{width:42px;height:42px}.topbar .quiet{font-size:12px;padding:8px}.layout{display:block}aside{padding:16px 18px;border-right:0;border-bottom:1px solid var(--line)}aside .eyebrow,.side-note{display:none}nav{display:flex;overflow-x:auto;padding-bottom:5px;gap:6px}nav a{flex:none;font-size:14px;padding:10px}nav .num{display:none}main{padding:27px 18px 45px}.grid,.grid.three,.comparison,.rule-grid,.controls{grid-template-columns:1fr}.hero{padding:24px}.card,.quiz{padding:20px}h1{font-size:37px}.example{font-size:19px}.tabs{gap:7px}.pill{padding:8px 12px;font-size:14px}footer{display:block}footer span{display:block;margin-top:8px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{body{font-size:12pt;background:#fff}header,aside,footer,.actions,.options,button,.tabs,.skip,.back-top{display:none!important}.layout{display:block}main{padding:0}h1{font-size:25pt}.card,.quiz,details,.notice{box-shadow:none;break-inside:avoid}.grid,.comparison,.rule-grid{display:block}.card{margin-bottom:12px}.hero{background:#fff;color:#000;border:1px solid}.hero h2,.hero p{color:#000}.hero-example{box-shadow:none}.example{font-size:13pt}details:not([open]){display:none}textarea{min-height:80px}}

.hero-illustration{display:block;width:100%;height:270px;object-fit:cover;object-position:center;border-radius:12px;border:2px solid #d6eeaf;box-shadow:8px 8px 0 #bde8cc}
.starter-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.starter-grid ul{margin:0;padding-left:20px}.starter-grid li{margin:0 0 14px}.starter-grid li:last-child{margin-bottom:0}.weak-card{border-color:#e4b6b6;background:#fffafa}.good-card{border-color:#a7d4b4;background:#fafffa}
@media(max-width:1050px){.starter-grid{grid-template-columns:1fr 1fr}}
@media(max-width:760px){.starter-grid{grid-template-columns:1fr}.hero-illustration{height:210px}}
@media print{.hero-illustration{max-height:150px}.starter-grid{display:block}.starter-grid .card{margin-bottom:12px}}