.mastery-tabs{display:flex;gap:8px;overflow-x:auto;padding:4px 0 18px}.mastery-tabs a{white-space:nowrap;padding:10px 15px;border-radius:24px;background:#fff;border:1px solid var(--line,#e5e7ed);font-size:13px;font-weight:650;color:#536075;text-decoration:none}.mastery-tabs a[aria-current]{color:#fff;background:#23384d;border-color:#23384d}.mastery-hero{display:grid;grid-template-columns:1.3fr 1fr;gap:30px;padding:32px;margin:0 0 22px;border-radius:22px;background:linear-gradient(120deg,#e8f5ef,#eeedf9);border:1px solid #dce9e4}.mastery-hero h2{font-size:30px;line-height:1.23;letter-spacing:-.8px;margin:12px 0}.mastery-hero p{color:#536575;max-width:430px}.mastery-counts{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-content:center}.mastery-counts article{display:flex;flex-direction:column;padding:17px;background:#ffffffb8;border-radius:16px}.mastery-counts strong{font-size:27px;color:#223f43}.mastery-counts span{font-size:12px;color:#596d77}.mastery-filters{display:flex;gap:16px;margin-bottom:14px}.mastery-filters label{display:flex;flex-direction:column;gap:7px;min-width:160px}.mastery-filters label:last-child{flex:1}.mastery-filters input,.mastery-filters select{padding:11px 13px;border:1px solid #dce2e9;border-radius:10px;background:white;color:#26384c;font:inherit;font-size:14px}.mastery-filters label>span{font-size:12px;color:#637186;font-weight:650}.mastery-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:15px}.mastery-card{display:flex;flex-direction:column;gap:9px}.mastery-card h2{font-size:18px;line-height:1.4;margin:0}.mastery-card>p:not(.section-kicker){font-size:13px;color:#617084;line-height:1.7;flex:1}.mastery-card>.btn{align-self:flex-start;margin-top:8px}.mastery-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:9px}.mastery-symbol{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:#eff5f3;color:#28705d}.mastery-symbol svg{width:21px;height:21px}.mastery-meta{margin-bottom:10px}.mastery-examples{display:grid;gap:10px;margin:18px 0}.mastery-examples article{display:flex;gap:16px;justify-content:space-between;padding:15px;background:#f7f9fb;border-radius:13px}.mastery-examples article>.btn{align-self:start;flex-shrink:0}.mastery-ipa{font-family:Arial,sans-serif;color:#6f5997;letter-spacing:.3px}.mastery-dialogue{display:grid;gap:14px;margin:20px 0}.mastery-dialogue article{display:flex;gap:12px;max-width:88%}.mastery-dialogue article>span{font-size:12px;font-weight:700;padding-top:15px;min-width:40px}.mastery-dialogue article>div{background:#edf5f1;border-radius:3px 15px 15px;padding:14px 18px}.mastery-dialogue article.alternate{justify-self:end}.mastery-dialogue article.alternate>div{background:#f0edfa}.mastery-dialogue p{margin:0 0 4px;line-height:1.8}.mastery-followup{border-top:1px solid #e6eaf0;padding:14px 0}.mastery-followup summary{cursor:pointer;font-weight:600}.mastery-followup p{padding:12px 0;line-height:1.8}.mastery-compare{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:20px}.mastery-compare>article,.mastery-compare>details{padding:20px;background:#f8f9fb;border-radius:14px}.mastery-compare>details{background:#eff7f2}.mastery-compare summary{cursor:pointer;font-weight:700}.mastery-edits{display:grid;gap:12px;margin-top:16px}.mastery-edits article{padding:14px;border-left:3px solid #b4d3c6;background:#f6f9f7}.mastery-edits del{color:#9e4956;background:#fff0f1}.mastery-edits ins{color:#216a4c;background:#e5f4ea;text-decoration:none}.mastery-terms{display:grid;grid-template-columns:1fr 1fr;gap:16px}.mastery-terms>article{padding:20px;border:1px solid #e5e9ed;border-radius:14px}.mastery-terms h3{font-size:18px}.mastery-pitfall{font-size:13px;padding:10px 12px;border-radius:8px;background:#fff8e9;line-height:1.7}.mastery-notes{display:block;width:100%;margin:10px 0;padding:15px;border:1px solid #d6dde5;border-radius:12px;font:inherit;font-size:16px;line-height:1.8;resize:vertical}.mastery-checks{display:grid;gap:12px;margin:20px 0}.mastery-checks label{display:flex;gap:10px;align-items:start;font-size:14px;line-height:1.6}.mastery-checks input{margin-top:5px}.mastery-home>span{background:#eeeafa;color:#785aaa}@media(max-width:1050px){.mastery-grid{grid-template-columns:1fr 1fr}}@media(max-width:640px){.mastery-hero{grid-template-columns:1fr;padding:23px;gap:16px}.mastery-hero h2{font-size:25px}.mastery-grid,.mastery-compare,.mastery-terms{grid-template-columns:1fr}.mastery-filters{flex-direction:column;gap:12px}.mastery-filters input,.mastery-filters select{font-size:16px}.mastery-dialogue article{max-width:100%}.mastery-examples article{padding:12px;gap:8px}.mastery-counts article{padding:13px}}