.study-section{margin:34px 0}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px}.section-heading h2{margin:7px 0 0}.detail-kicker{font-size:11px;text-transform:uppercase;letter-spacing:1.2px;font-weight:800;color:var(--primary)}.study-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.study-card{padding:21px;border:1px solid var(--line);border-radius:17px;background:var(--card)}.study-card h3{font-size:17px;margin:12px 0 8px;line-height:1.35}.study-card p{font-size:14px;margin:0;line-height:1.7}.step-number{display:inline-flex;width:35px;height:35px;align-items:center;justify-content:center;background:var(--soft);color:var(--primary);border-radius:11px;font-size:13px;font-weight:850}.lesson-skill{display:block;font-size:10px;text-transform:uppercase;letter-spacing:.7px;color:var(--primary);font-weight:750;margin-bottom:7px}.lesson .lesson-meta{font-size:11px;color:var(--muted);padding-top:4px}.faq details,.handbook details{border:1px solid var(--line);border-radius:14px;background:var(--card);margin:10px 0}.faq summary,.handbook summary,.theory-panel summary{cursor:pointer;font-weight:700;padding:18px;line-height:1.5}.faq details p{padding:0 18px 18px;margin:0;font-size:14px}.handbook summary{display:flex;gap:14px;align-items:center;font-size:15px}.reference-grade{color:var(--primary);background:var(--soft);padding:5px 9px;border-radius:8px;white-space:nowrap;font-size:12px}.reference-plus{margin-left:auto;color:var(--primary);font-size:22px}.handbook details[open] .reference-plus{transform:rotate(45deg)}.reference-body{padding:0 20px 18px;font-size:14px;line-height:1.7}.reference-body p{margin-top:0}.worked-example{padding:18px;background:var(--bg);border-radius:12px;border:1px solid var(--line)}.worked-example strong{display:block;font-size:19px;margin:8px 0 14px;line-height:1.5;overflow-wrap:anywhere}.worked-example ol{padding-left:22px;margin:0}.worked-example li+li{margin-top:6px}.study-tip{margin:15px 0 0!important;color:var(--primary)}.theory-panel{border:1px solid var(--line);border-radius:12px;margin:18px 0;background:var(--bg)}.theory-panel summary{font-size:13px;color:var(--primary);padding:13px 15px}.theory-panel .worked-example{background:var(--card)}.achievement-heading{margin-top:28px}.badge{position:relative}.badge-symbol{font-size:30px;color:var(--muted)}.badge-status{font-size:11px;color:var(--muted);float:right}.badge.earned{border-color:var(--primary);background:var(--soft)}.badge.earned .badge-symbol,.badge.earned .badge-status{color:var(--primary)}#nextGoal p{margin-bottom:18px}.top{flex-wrap:wrap}.auth-box{max-width:100%}button:focus-visible,summary:focus-visible{outline:3px solid var(--primary);outline-offset:3px}.question{overflow-wrap:anywhere}.sidebar nav{flex-wrap:wrap}@media(max-width:980px){.study-grid{grid-template-columns:1fr}.section-heading{align-items:flex-start;flex-direction:column}.lesson{padding:18px;gap:12px}}@media(max-width:520px){.handbook summary{font-size:13px;gap:9px;padding:14px}.reference-body{padding:0 14px 15px}.worked-example strong{font-size:17px}.eyebrow{font-size:10px}.study-section{margin:28px 0}.sidebar .nav{flex:1;white-space:nowrap;font-size:12px}.study-card{padding:18px}}