:root{--navy:#14325c;--navy2:#0d2240;--red:#c8102e;--ink:#1d2330;--muted:#5a6475;--line:#dfe3ea;--bg:#f6f7fa;--card:#fff;--ok:#11743b;--okbg:#e8f6ee;--no:#b3261e;--nobg:#fdecea;--gold:#f2b705;--r:10px;--max:1200px}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:#1a4fa0;text-underline-offset:2px}a:hover{color:var(--red)}
img{max-width:100%}
h1,h2,h3{line-height:1.25;color:var(--navy2)}h1{font-size:clamp(1.8rem,4vw,2.5rem);margin:.2em 0 .4em}h2{font-size:1.5rem;margin:1.8em 0 .5em}h3{font-size:1.15rem;margin:1.4em 0 .4em}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:.5em 1em;z-index:100}.skip:focus{left:8px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 18px}
.small{font-size:.88rem;color:var(--muted)}
.site-header{background:var(--navy);color:#fff;position:sticky;top:0;z-index:50;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.hdr{display:flex;align-items:center;justify-content:space-between;min-height:62px;gap:1rem}
.brand{display:flex;align-items:center;gap:.45rem;color:#fff;text-decoration:none;font-size:1.25rem;font-weight:700;letter-spacing:.2px}.brand b{color:#ffd166;font-weight:800}
.brand:hover{color:#fff}.logo{display:inline-grid;place-items:center;line-height:0}.logo .flag{display:block;border-radius:3px;box-shadow:0 0 0 1px rgba(255,255,255,.35);overflow:hidden}.brand.small .logo .flag{width:30px;height:20px}
.brand.small{color:var(--navy2);font-size:1.05rem}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:.15rem;flex-wrap:wrap}
.site-nav a{color:#e6ecf7;text-decoration:none;padding:.45rem .6rem;border-radius:6px;font-size:.95rem;display:block}
.site-nav a:hover,.site-nav a[aria-current]{background:rgba(255,255,255,.14);color:#fff}
.nav-toggle{display:none;background:transparent;border:1px solid rgba(255,255,255,.5);color:#fff;border-radius:6px;padding:.4rem .8rem;font-family:inherit;font-size:1rem}
@media(max-width:1180px){.nav-toggle{display:block}.site-nav{display:none;position:absolute;left:0;right:0;top:62px;background:var(--navy);padding:.5rem 18px 1rem}.site-nav.open{display:block}.site-nav ul{flex-direction:column}}
/* ads */
.ad-slot{margin:18px auto;text-align:center;min-height:0;position:relative}
.ad-label{display:block;font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:#8a93a3;margin-bottom:2px}
.ad-placeholder{background:repeating-linear-gradient(45deg,#eef0f4,#eef0f4 10px,#e8ebf0 10px,#e8ebf0 20px);border:1px dashed #cdd3dd;border-radius:6px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#8a93a3}
.ad-top.ad-placeholder{max-width:728px;height:90px}.ad-incontent.ad-placeholder{height:120px;max-width:728px}.ad-sidebar.ad-placeholder{width:300px;height:600px;max-width:100%}
@media(max-width:760px){.ad-top.ad-placeholder{height:60px}}
.ad-empty .ad-label{display:none}
.top-ad-wrap .ad-slot{margin:14px auto 6px}
/* layout */
.page{display:block;padding-bottom:40px}.page.has-side{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px}
@media(max-width:1023px){.page.has-side{display:block}.sidebar{display:none}}
.content{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:clamp(18px,4vw,44px);min-width:0;margin-top:8px}
.home .content{background:transparent;border:0;padding:8px 0}
.sidebar{margin-top:8px}.side-toc{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;font-size:.9rem}
.side-h{font-size:1rem;margin:0 0 .5rem}.side-list{list-style:none;margin:0;padding:0}.side-list li a{display:flex;gap:.5rem;padding:.28rem .3rem;border-radius:6px;text-decoration:none;color:var(--ink)}
.side-list li a:hover{background:#f0f3f8}.side-list a[aria-current]{background:#e7eefb;font-weight:600;color:var(--navy2)}
.unit-label{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:.7rem 0 .15rem .3rem}
.chnum{display:inline-grid;place-items:center;min-width:24px;height:24px;border-radius:50%;background:var(--navy);color:#fff;font-size:.75rem;font-weight:700;flex:none}
.side-ad-wrap{position:sticky;top:80px}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.3rem;padding:0;margin:0 0 .8rem;font-size:.85rem;color:var(--muted)}.crumbs li+li:before{content:"›";margin-right:.3rem}
.kicker{text-transform:uppercase;letter-spacing:.08em;font-size:.78rem;font-weight:700;color:var(--red);margin:0}
.lead{font-size:1.15rem;color:#323b4d}
/* book content */
.chapter section,.case section{border-top:1px solid var(--line);margin-top:2rem}
.chapter section>h2,.case section>h2{margin-top:1.2rem}
.toc{background:#f4f7fc;border:1px solid #dbe4f3;border-radius:8px;padding:.6rem 1rem;margin:1rem 0 1.5rem}.toc summary{font-weight:700;cursor:pointer}.toc ol{margin:.5rem 0 0;columns:2;column-gap:2rem}@media(max-width:700px){.toc ol{columns:1}}
.recap{background:#fffaf0;border-left:4px solid var(--gold);border-radius:6px;padding:.4rem 1.1rem;margin:1.4rem 0}.recap h3{margin-top:.6rem;color:#7a5a00}
.callout{background:#eef4ff;border-left:4px solid #1a4fa0;border-radius:6px;padding:.3rem 1.1rem;margin:1.2rem 0}
blockquote.excerpt,.q-excerpt{margin:1.2rem 0;padding:.8rem 1.2rem;border-left:4px solid var(--red);background:#faf7f2;font-family:Georgia,"Times New Roman",serif;font-size:1.05rem;border-radius:0 6px 6px 0}
blockquote.excerpt cite{display:block;font-style:normal;font-family:system-ui,sans-serif;font-size:.85rem;color:var(--muted);margin-top:.4rem}blockquote.excerpt cite:before{content:"— "}
dl.terms dt{font-weight:700;color:var(--navy2);margin-top:.8rem}dl.terms dd{margin:.15rem 0 0 0;padding-left:1rem;border-left:2px solid var(--line)}
table.data{width:100%;border-collapse:collapse;margin:1.2rem 0;font-size:.95rem;display:block;overflow-x:auto}
table.data caption{text-align:left;font-weight:700;padding:.3rem 0;color:var(--navy2)}
table.data th,table.data td{border:1px solid var(--line);padding:.5rem .7rem;text-align:left;vertical-align:top}table.data thead th{background:#f0f3f8}
table.data tbody tr:nth-child(even){background:#fafbfd}
table.data tr:target,li:target,h3:target,dt:target,.extra-case:target,section:target>h2{background:#fff6d6;transition:background 1s}
.case-meta{color:var(--muted);font-size:.92rem;margin-top:-.3rem}.tag{display:inline-block;background:#eef1f6;border-radius:999px;padding:.05rem .6rem;font-size:.8rem;color:#3b4660}
.tag.ok{background:var(--okbg);color:var(--ok)}.tag.no{background:var(--nobg);color:var(--no)}
dl.case-brief dt{font-weight:700;color:var(--red);text-transform:uppercase;font-size:.78rem;letter-spacing:.06em;margin-top:.8rem}dl.case-brief dd{margin:.1rem 0 0}
dl.case-facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:.8rem;background:#f4f7fc;border-radius:8px;padding:1rem;margin:1rem 0}
dl.case-facts dt{font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}dl.case-facts dd{margin:0;font-weight:600}
ul.inline{list-style:none;padding:0;margin:0}
.more{font-weight:600}.extra-case{border-top:1px dashed var(--line);padding-top:.4rem}
.practice-cta{background:linear-gradient(135deg,#14325c,#1f4b86);color:#fff;border-radius:var(--r);padding:1.2rem 1.5rem;margin:2.5rem 0 1rem}.practice-cta h2{color:#fff;margin:.2rem 0 .3rem;border:0}
.prevnext{display:flex;justify-content:space-between;gap:1rem;margin-top:1.5rem}
.pn{flex:1;border:1px solid var(--line);border-radius:8px;padding:.7rem 1rem;text-decoration:none;max-width:48%}.pn small{display:block;color:var(--muted);font-size:.78rem}.pn.next{text-align:right;margin-left:auto}
/* buttons */
.btn{display:inline-block;background:var(--red);color:#fff;border:2px solid var(--red);border-radius:8px;padding:.55rem 1.1rem;font-family:inherit;font-weight:600;font-size:1rem;line-height:1.3;text-decoration:none;cursor:pointer;margin:.2rem .2rem .2rem 0}
.btn:hover{background:#a50d26;border-color:#a50d26;color:#fff}.btn.ghost{background:#fff;color:var(--navy2);border-color:#c5cede}.btn.ghost:hover{border-color:var(--navy);color:var(--navy)}
.btn[disabled]{opacity:.45;cursor:not-allowed}.btn.big{padding:.8rem 1.4rem;font-size:1.08rem}
.practice-cta .btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
/* home */
.hero{background:linear-gradient(135deg,#0d2240 0%,#14325c 55%,#24508f 100%);color:#fff;border-radius:16px;padding:clamp(24px,6vw,60px);margin-top:8px;position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;inset:10px;pointer-events:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 1.5l3.1 6.6 7.2.9-5.3 5 1.4 7.1L12 17.6l-6.4 3.5 1.4-7.1-5.3-5 7.2-.9z' fill='%23fff' fill-opacity='.22'/%3E%3C/svg%3E"),url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 1.5l3.1 6.6 7.2.9-5.3 5 1.4 7.1L12 17.6l-6.4 3.5 1.4-7.1-5.3-5 7.2-.9z' fill='%23fff' fill-opacity='.22'/%3E%3C/svg%3E"),url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 1.5l3.1 6.6 7.2.9-5.3 5 1.4 7.1L12 17.6l-6.4 3.5 1.4-7.1-5.3-5 7.2-.9z' fill='%23fff' fill-opacity='.22'/%3E%3C/svg%3E"),url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 1.5l3.1 6.6 7.2.9-5.3 5 1.4 7.1L12 17.6l-6.4 3.5 1.4-7.1-5.3-5 7.2-.9z' fill='%23fff' fill-opacity='.22'/%3E%3C/svg%3E");background-repeat:space no-repeat,space no-repeat,no-repeat space,no-repeat space;background-position:top,bottom,left,right;background-size:18px 18px}.hero>*{position:relative;z-index:1}@media (max-width:600px){.hero:after{inset:6px;background-size:12px 12px}}
.hero h1{color:#fff;margin-top:0}.hero .lead{color:#dfe7f5;max-width:46rem}
.hero .btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.65)}
.stats{list-style:none;display:flex;flex-wrap:wrap;gap:1.5rem;padding:0;margin:1.5rem 0 0;color:#c9d6ec}.stats b{display:block;color:#fff;font-size:1.6rem}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}.cards.four{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
ul.cards{list-style:none;padding:0}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:1rem 1.2rem}.card h3{margin-top:.3rem}
.card.link{text-decoration:none;color:var(--ink);transition:transform .15s,box-shadow .15s}.card.link:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(20,50,92,.12)}
ul.mini{padding-left:1.1rem;margin:.4rem 0 0;font-size:.95rem}
.steps li{margin:.5rem 0}
.pill-list{display:flex;flex-wrap:wrap;gap:.4rem}.pill{background:#fff;border:1px solid var(--line);border-radius:999px;padding:.25rem .8rem;font-size:.9rem;text-decoration:none}
.home section h2{margin-top:2rem}
/* study guide */
ol.book{list-style:none;padding:0}.bk-ch{border:1px solid var(--line);border-radius:8px;padding:.6rem 1rem;margin:.7rem 0}.bk-ch h3{margin:.3rem 0}.bk-ch h3 a{text-decoration:none;display:flex;gap:.5rem;align-items:center}
.bk-ch details summary{cursor:pointer;color:var(--muted);font-size:.9rem}.bk-ch p{margin:.3rem 0}
ol.tests{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px}
.test-tile{display:block;text-align:center;border:1px solid var(--line);border-radius:10px;padding:.8rem;text-decoration:none;background:#f8fafd}.test-tile b{display:block;font-size:1.15rem;color:var(--navy2)}.test-tile span{font-size:.85rem;color:var(--muted)}
.test-tile:hover{border-color:var(--navy);background:#eef3fb}
ol.cols{columns:2;column-gap:2rem}@media(max-width:700px){ol.cols{columns:1}}ol.cols li{break-inside:avoid;margin:.2rem 0}
.alpha{display:flex;flex-wrap:wrap;gap:.3rem;margin:1rem 0}.alpha a{display:inline-grid;place-items:center;width:34px;height:34px;border:1px solid var(--line);border-radius:6px;text-decoration:none;font-weight:700}
dl.glossary dd .more{font-size:.88rem;font-weight:500}
/* quiz */
.quiz-head h1{font-size:clamp(1.4rem,3vw,1.9rem);margin-top:0}
.quiz-bar{display:flex;flex-wrap:wrap;gap:.5rem 1.2rem;align-items:center;font-size:.92rem;color:var(--muted)}
.switch{display:inline-flex;gap:.4rem;align-items:center;cursor:pointer;color:var(--ink)}
.progress{height:6px;background:#e7eaf0;border-radius:99px;margin:.6rem 0 1.2rem;overflow:hidden}.progress span{display:block;height:100%;background:var(--red);transition:width .3s}
.qcard{outline:none}.qcard fieldset{border:0;padding:0;margin:0}.q-meta{font-size:.82rem;color:var(--muted);margin:0 0 .3rem}
.q-text{font-size:1.12rem;font-weight:600;padding:0;margin-bottom:.8rem;width:100%}.q-text p{margin:.2rem 0 .6rem}
.q-excerpt{font-weight:400}
.opts{display:grid;gap:10px}
.opt{display:flex;align-items:flex-start;gap:.7rem;border:2px solid var(--line);border-radius:10px;padding:.7rem .9rem;cursor:pointer;background:#fff;transition:border-color .15s,background .15s}
.opt:hover{border-color:#9fb3d6}.opt input{position:absolute;opacity:0;pointer-events:none}
.opt .letter{flex:none;display:inline-grid;place-items:center;width:28px;height:28px;border-radius:50%;border:2px solid #9aa6ba;font-weight:700;font-size:.85rem;color:#4a5568}
.opt:has(input:checked){border-color:var(--navy);background:#eef3fb}.opt:has(input:checked) .letter{background:var(--navy);border-color:var(--navy);color:#fff}
.opt:has(input:focus-visible){outline:3px solid #ffbf47;outline-offset:2px}
.opt.correct{border-color:var(--ok);background:var(--okbg)}.opt.correct .letter{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.wrong{border-color:var(--no);background:var(--nobg)}.opt.wrong .letter{background:var(--no);border-color:var(--no);color:#fff}
.opt.correct:has(input:checked){border-color:var(--ok);background:var(--okbg)}.opt.correct:has(input:checked) .letter{background:var(--ok);border-color:var(--ok)}.opt.wrong:has(input:checked){border-color:var(--no);background:var(--nobg)}.opt.wrong:has(input:checked) .letter{background:var(--no);border-color:var(--no)}
.feedback{border-radius:8px;padding:.5rem 1rem;margin-top:1rem}.feedback.ok{background:var(--okbg);border-left:4px solid var(--ok)}.feedback.no{background:var(--nobg);border-left:4px solid var(--no)}
.qactions{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:1.2rem}.qactions .submit{margin-left:auto;background:var(--navy);border-color:var(--navy)}
.navigator{margin-top:1.5rem;border-top:1px solid var(--line);padding-top:.8rem}.navigator summary{cursor:pointer;font-weight:600}
.nbs{display:flex;flex-wrap:wrap;gap:6px;margin-top:.6rem}.nb{width:38px;height:34px;border:1px solid #c5cede;border-radius:6px;background:#fff;font-family:inherit;font-weight:600;font-size:.85rem;cursor:pointer;color:var(--ink)}
.nb.done{background:#e3eaf6;border-color:#9fb3d6}.nb.flag{box-shadow:inset 0 -3px 0 var(--gold)}.nb.cur{outline:2px solid var(--red);outline-offset:1px}
.results .score{text-align:center;border-radius:12px;padding:1.2rem;margin:1rem 0}.score.pass{background:var(--okbg);color:var(--ok)}.score.fail{background:var(--nobg);color:var(--no)}
.score .big{font-size:2.6rem;font-weight:800}.score p{color:var(--ink)}
ol.review{padding-left:0;list-style:none}.rv{border:1px solid var(--line);border-radius:10px;padding:.8rem 1rem;margin:.8rem 0}.rv-no{border-left:5px solid var(--no)}.rv-ok{border-left:5px solid var(--ok)}
.rv-q{font-weight:600;display:flex;gap:.6rem}.rv-q>div,.rv-q>p{flex:1}.rv-n{flex:none;display:inline-grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#eef1f6;font-size:.8rem}
.rv p{margin:.35rem 0}.rv-exp{color:#3b4660}
.review-link{display:inline-block;font-weight:600;background:#eef4ff;border-radius:6px;padding:.3rem .7rem;text-decoration:none}
ol.review.only-wrong .rv-ok{display:none}
.topics ul{columns:2}@media(max-width:700px){.topics ul{columns:1}}
.cta-row{margin:1.2rem 0}
/* adblock modal */
.ab-backdrop{position:fixed;inset:0;background:rgba(13,34,64,.55);display:flex;align-items:center;justify-content:center;z-index:1000;padding:16px}
.ab-modal{background:#fff;border-radius:14px;max-width:440px;width:100%;padding:1.5rem 1.6rem 1.1rem;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.ab-modal h2{margin:0 0 .5rem;font-size:1.3rem}.ab-x{position:absolute;right:10px;top:8px;border:0;background:none;font-size:1.6rem;line-height:1;cursor:pointer;color:var(--muted);padding:.2rem .5rem}
.ab-actions{display:flex;flex-wrap:wrap;gap:.4rem}#ab-venmo{background:#008cff;border-color:#008cff}#ab-venmo:hover{background:#0070cc}
.ab-note{font-size:.8rem;color:var(--muted);margin-bottom:0}
/* footer */
.site-footer{background:#0d2240;color:#c3cde0;padding:2rem 0;font-size:.9rem}.site-footer a{color:#e6ecf7}
.foot{display:grid;grid-template-columns:1fr 2fr;gap:1.5rem}.foot .brand.small{color:#fff}
.foot nav ul{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:.3rem 1.2rem}
.disclaimer,.copy{grid-column:1/-1;margin:0}.disclaimer{border-top:1px solid rgba(255,255,255,.15);padding-top:1rem}
@media(max-width:700px){.foot{grid-template-columns:1fr}}
:focus-visible{outline:3px solid #ffbf47;outline-offset:2px}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
/* share bar */
.share{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem;margin:1rem 0;padding:.6rem .75rem;background:#f4f7fc;border:1px solid #dbe4f3;border-radius:8px}
.share-label{font-weight:700;color:var(--navy);margin-right:.2rem}
.share-btn{display:inline-block;font:inherit;font-size:.88rem;line-height:1.2;padding:.4rem .7rem;border:1px solid #b9c8e2;border-radius:999px;background:#fff;color:var(--navy);text-decoration:none;cursor:pointer}
.share-btn:hover,.share-btn:focus-visible{background:var(--navy);color:#fff;border-color:var(--navy)}
.share-native{background:var(--navy);color:#fff;border-color:var(--navy)}
.share-msg{font-size:.88rem;color:var(--ok);font-weight:600}
/* learning path */
.path-panel{margin:1rem 0}.big-bar{height:14px;margin:.5rem 0 .8rem}
.path{list-style:none;margin:0;padding:0;border-left:3px solid #dbe4f3;margin-left:1rem}
.step{position:relative;margin:0 0 .9rem;padding:.75rem 1rem .5rem 1.2rem;background:#fff;border:1px solid #dbe4f3;border-radius:10px;margin-left:1rem}
.step-main{display:flex;gap:.8rem;align-items:flex-start}.step h3{margin:.1rem 0 .2rem;font-size:1.08rem}
.step-num{flex:0 0 2.2rem;height:2.2rem;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;background:#e9eef7;color:var(--navy)}
.step-links{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;margin:.4rem 0}.step-links .btn{padding:.4rem .8rem;font-size:.92rem}
.step-status{margin:.1rem 0;font-weight:600;color:#55627a}.step-msg{margin:0;color:var(--no)}
.step.is-done{border-color:var(--ok);background:var(--okbg)}.step.is-done .step-num{background:var(--ok);color:#fff}
.step.is-open{border-color:var(--navy);box-shadow:0 2px 10px rgba(20,50,92,.12)}
.step.is-locked{opacity:.72}.step.is-locked a.step-go{background:#9aa6b8;border-color:#9aa6b8;cursor:not-allowed}
.step.milestone .step-num{background:#fdf0d2;color:#8a5a00}.step.final .step-num{background:#fde3e6}
.path-mini{font-size:.9rem;color:#55627a;margin:-.4rem 0 1rem}
.quiz-sub{margin:-.3rem 0 .6rem;color:#55627a;font-size:.95rem}
.timer.countdown{font-variant-numeric:tabular-nums;font-weight:700}.timer.low{color:var(--no)}
.nb.nb-ok{background:var(--okbg);border-color:var(--ok)}.nb.nb-no{background:var(--nobg);border-color:var(--no)}
/* topic pages */
.topic-cards{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.tq-sec h2 .small{font-weight:400}.tq-list{padding-left:1.4rem}
.tq{margin:0 0 1.1rem;padding-bottom:.8rem;border-bottom:1px solid #e6ebf3;break-inside:avoid}
.tq-stem p{margin:.2rem 0}.tq-opts{margin:.3rem 0 .4rem;padding-left:1.6rem}.tq-opts li{margin:.1rem 0}
.tq details summary{cursor:pointer;color:var(--navy);font-weight:600;font-size:.92rem}.tq details p{background:var(--okbg);padding:.5rem .7rem;border-radius:6px}
.table-wrap{overflow-x:auto}.teacher-table td,.teacher-table th{font-size:.92rem}.teacher-table .unit-row th{background:#eef2f9;text-align:left}
code{background:#f1f4f9;padding:.05rem .3rem;border-radius:4px;font-size:.9em;word-break:break-word}
/* worksheet */
.ws-head{border-bottom:2px solid var(--navy);margin-bottom:1rem}.ws-name{font-size:.95rem;margin:.2rem 0 .8rem}.ws-sub{font-weight:600;color:#55627a;margin:.2rem 0}
.ws-list{padding-left:1.6rem}.ws-q{margin:0 0 1rem;break-inside:avoid;page-break-inside:avoid}.ws-stem p{margin:.2rem 0}.ws-opts{padding-left:1.6rem;margin:.3rem 0}
.ws-key{margin-top:2rem;border-top:2px dashed #b9c8e2;padding-top:1rem}.ws-keylist li{margin:.25rem 0;break-inside:avoid}
@media(max-width:600px){.share{padding:.5rem}.share-btn{font-size:.82rem;padding:.35rem .55rem}.step{padding:.6rem .7rem .4rem .8rem;margin-left:.6rem}.path{margin-left:.3rem}.step-num{flex-basis:1.8rem;height:1.8rem}}
@media print{.site-header,.site-footer,.ad-slot,.sidebar,.top-ad-wrap,.practice-cta,.prevnext,.share,.no-print,.crumbs,.site-nav,.skip,.qactions,.navigator,.cta-row,.path-mini,.ws-tools,.btn,.toc{display:none!important}
.page.has-side{display:block}.content{border:0;box-shadow:none;padding:0}body{background:#fff;color:#000;font-size:11.5pt}a{color:#000;text-decoration:none}
.wrap,.page{max-width:none;padding:0;margin:0}h1,h2,h3{break-after:avoid;page-break-after:avoid}
.tq,.ws-q,.qcard,.rv,blockquote,table,figure{break-inside:avoid;page-break-inside:avoid}
.tq details{display:block}.tq details:not([open]) summary{display:none}
.ws-key{break-before:page;page-break-before:always;border:0;margin-top:0}.hero{background:none;color:#000}.hero:after{display:none}}

.site-footer .support a{font-weight:700;text-decoration:underline}