@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{font-family:'DM Sans',sans-serif;color:#193e45;background:#f4f7f8;font-synthesis:none;--ink:#193e45;--teal:#12695e;--line:#d6e2e4;--muted:#536b72}*{box-sizing:border-box}body{margin:0}button,select{font:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}button:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid #17877a;outline-offset:4px}[hidden]{display:none!important}header{max-width:1240px;margin:auto;padding:32px 44px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;gap:16px;align-items:center}.brandmark{display:grid;place-items:center;background:#13434b;color:#a6f1d8;width:52px;height:56px;font:700 30px Manrope,sans-serif;border-radius:15px 15px 15px 3px}.eyebrow{font-size:12px;letter-spacing:1.6px;font-weight:700;color:#53747a}h1{font:800 24px Manrope,sans-serif;margin:4px 0}h2{font:800 30px/1.3 Manrope,sans-serif;margin:10px 0}h3{font:700 21px Manrope,sans-serif;margin:26px 0 10px}p,li{font-size:16px;line-height:1.75}p{margin:10px 0 18px}.chapter{font-size:12px;letter-spacing:1.4px;color:#526b71}.chapter span{padding:0 12px;color:#9cacae}main{max-width:1152px;margin:0 auto;padding:0 0 25px}nav{display:flex;border-bottom:1px solid var(--line);gap:12px}nav button{background:none;border:0;border-bottom:3px solid transparent;padding:19px 26px;font-weight:700;color:var(--muted);margin-bottom:-1px}nav button span{font-size:12px;opacity:.6;margin-left:20px}nav button[aria-selected=true]{border-color:var(--teal);color:var(--teal)}.sectionhead{display:flex;justify-content:space-between;align-items:center;padding:36px 0 26px;gap:24px}.sectionhead p{color:var(--muted);margin-bottom:0}.mini{border-left:1px solid var(--line);padding:4px 30px;min-width:165px;display:flex;flex-direction:column;gap:5px}.mini strong{font:800 28px Manrope,sans-serif}.mini span{font-size:14px;color:var(--muted)}.learn-layout{display:grid;grid-template-columns:265px 1fr;gap:28px}aside{display:flex;flex-direction:column;gap:5px;align-self:start}aside button{text-align:left;border:0;border-radius:8px;padding:12px 14px;background:none;color:var(--muted);display:flex;gap:12px;line-height:1.4;font-size:14px}aside button.active{background:#dceee9;color:#104e46;font-weight:700}aside button .num{font-size:12px;padding-top:2px;width:22px;flex-shrink:0}article{background:white;border:1px solid var(--line);border-radius:16px;padding:32px 38px}article>h2{font-size:28px}article p,article li{color:#36565e}ul{padding-left:23px}.callout{background:#edf7f4;border-left:3px solid #419d88;border-radius:0 8px 8px 0;padding:18px 22px;margin:24px 0}.callout p:last-child{margin-bottom:0}table{width:100%;border-collapse:collapse;font-size:15px;line-height:1.6;margin:18px 0}td,th{text-align:left;border-bottom:1px solid var(--line);padding:12px 10px;vertical-align:top}th{background:#f3f7f8;font-size:14px}.table-wrap{overflow:auto}.check{border-top:1px solid var(--line);margin-top:30px;padding-top:24px}.check h3{margin:8px 0 18px}.options{display:grid;gap:10px}.option{text-align:left;border:1px solid var(--line);background:#fff;border-radius:9px;padding:14px 16px;line-height:1.5;color:var(--ink)}.option:hover:not(:disabled){border-color:#4a9e8c;background:#f1f9f6}.option.selected{border:2px solid var(--teal);background:#edf7f3;padding:13px 15px}.option.correct{border-color:#248569;background:#e8f6ee}.option.wrong{border-color:#b96541;background:#fff1e9}.feedback{padding:16px 20px;background:#edf7f3;border-radius:9px;margin-top:14px;line-height:1.7}.feedback.wrong{background:#fff1e9}.actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:24px}.btn{border:1px solid var(--line);border-radius:9px;padding:12px 18px;background:#fff;color:var(--ink);font-weight:600}.btn.primary{background:var(--teal);border-color:var(--teal);color:white}.btn.soft{background:#e3f2ed;border-color:#cee7dd;color:#135b4b}.btn.difficult{background:#fff2e9;border-color:#efd4c1;color:#904a27}.spacer{flex:1}footer{display:flex;justify-content:space-between;gap:15px;color:#657d83;font-size:12px;margin-top:32px;line-height:1.6}.toolbar{display:flex;gap:16px;flex-wrap:wrap;align-items:end;margin-bottom:22px}.toolbar label{display:flex;flex-direction:column;gap:7px;font-size:14px;font-weight:600}.toolbar select{padding:11px 35px 11px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}.stats{display:flex;gap:24px;flex-wrap:wrap;font-size:14px;color:var(--muted);margin:16px 0}.stats strong{color:var(--ink)}progress{height:7px;width:100%;border:0;background:#e1e9eb;border-radius:9px;overflow:hidden}progress::-webkit-progress-bar{background:#e1e9eb}progress::-webkit-progress-value{background:#218973}progress::-moz-progress-bar{background:#218973}.card-shell{max-width:820px;margin:0 auto}.flashcard{width:100%;min-height:305px;border:1px solid #b9d6d0;border-radius:20px;background:linear-gradient(130deg,#fff,#f0faf6);padding:30px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--ink);box-shadow:0 12px 28px #193e4508;gap:22px}.flashcard .face{font:700 30px/1.45 Manrope,sans-serif;max-width:650px}.flashcard .hint{font-size:14px;color:#5a7f7b}.card-meta{display:flex;justify-content:space-between;font-size:14px;color:var(--muted);margin:22px 0 13px}.card-actions{justify-content:center}.flashcard .eyebrow{color:#45766b}.test-layout{display:grid;grid-template-columns:1fr 220px;gap:24px}.question-nav{border:1px solid var(--line);border-radius:14px;padding:20px;background:#fff;align-self:start}.question-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin-top:12px}.question-grid button{border:1px solid var(--line);background:#fff;border-radius:6px;padding:8px 0;font-size:14px;color:var(--ink)}.question-grid button.answered{background:#e0f2e9;border-color:#a5d3bf}.question-grid button.active{outline:2px solid var(--teal);outline-offset:1px}.question-grid button.wrong{background:#fff0e8;border-color:#d49471}.small{font-size:14px;color:var(--muted)}.score{background:#13434b;color:white;border-radius:16px;padding:28px 32px;margin-bottom:24px;display:flex;align-items:center;gap:30px}.score strong{font:800 44px Manrope,sans-serif}.score p{margin:4px 0;color:#cfe6e5}.empty{text-align:center;padding:60px 20px;background:#fff;border:1px solid var(--line);border-radius:16px}.pathway{padding:20px;background:#edf5f8;border-radius:10px;line-height:2;font-weight:600}.complete{font-size:14px;color:var(--teal)}@media(max-width:900px){main{padding:0 24px 24px}header{padding:24px}.chapter{display:none}.learn-layout{grid-template-columns:200px 1fr;gap:18px}article{padding:26px}.test-layout{grid-template-columns:1fr}.question-nav{order:-1}.question-grid{grid-template-columns:repeat(10,1fr)}}@media(max-width:640px){header{padding:22px 20px}h1{font-size:21px}main{padding:0 16px 20px}nav{gap:0}nav button{padding:16px 12px;flex:1;font-size:14px}nav button span{display:none}.sectionhead{padding:27px 0 22px;align-items:start}.sectionhead h2{font-size:25px}.mini{padding:0 0 0 14px;min-width:100px}.mini strong{font-size:24px}.mini span{font-size:12px}.learn-layout{grid-template-columns:1fr}aside{max-height:180px;overflow:auto;background:#eaf0f1;border-radius:10px;padding:6px}article{padding:24px 20px}article>h2{font-size:25px}.flashcard .face{font-size:24px}.flashcard{min-height:280px;padding:24px}.toolbar{gap:12px}.toolbar label{flex:1}.toolbar select{width:100%}.stats{gap:12px}.score{gap:20px;padding:24px}.score strong{font-size:34px}footer{flex-direction:column;gap:5px}.question-grid{grid-template-columns:repeat(8,1fr)}}

.guided{border-bottom:1px solid var(--line);padding:14px 0}.guided summary{cursor:pointer;font-weight:600;line-height:1.6;font-size:16px}.guided p{padding:12px 16px;background:#edf7f4;border-radius:8px;margin:12px 0 0}.guided summary:focus-visible{outline:3px solid #17877a;outline-offset:4px}

.frq-jump{display:flex;gap:16px;align-items:center;flex-wrap:wrap;padding:20px 0;border-bottom:1px solid var(--line)}.frq-jump span{color:var(--muted);font-size:14px}.frq-jump a{text-decoration:none;margin-left:auto}.frq-section{scroll-margin-top:20px}.frq-article{margin-bottom:22px}.frq-label{display:block;font-weight:700;margin:24px 0 10px}.frq-article textarea{width:100%;resize:vertical;min-height:190px;padding:16px;font:16px/1.7 "DM Sans",sans-serif;color:var(--ink);border:1px solid #9bb7b9;border-radius:9px;background:#fbfdfd}.frq-article textarea:focus-visible{outline:3px solid #17877a;outline-offset:3px}.rubric-item{display:flex;align-items:start;gap:12px;padding:10px 0;font-size:16px;line-height:1.6}.rubric-item input{margin-top:5px;width:18px;height:18px;flex-shrink:0;accent-color:var(--teal)}.frq-parts{padding:4px 20px;background:#edf5f8;border-radius:9px}