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35px;padding:0 0 20px;border-bottom:2px solid #203743}.challenge-phase header .eyebrow{grid-column:1/-1}.challenge-phase h2{font-size:1.75rem;letter-spacing:-.035em;margin:8px 0;line-height:1.2}.challenge-phase header p{margin:8px 0;line-height:1.6;color:#55707b}.challenge-phase ol{list-style:none;margin:0;padding:0}.challenge-row{display:grid;grid-template-columns:52px minmax(0,1fr) 28px;gap:20px;padding:26px 0;border-bottom:1px solid #d4e1e5;align-items:start}.day-index{font-size:1.7rem;line-height:1.3;letter-spacing:-.04em;font-weight:750;color:#708b95;font-variant-numeric:tabular-nums}.challenge-row h3{margin:0 0 8px;font-size:1.3rem;line-height:1.35;letter-spacing:-.02em}.challenge-row p{margin:0 0 10px;line-height:1.65;color:#526c78;max-width:780px}.row-meta{font-size:.82rem;color:#617e89}.challenge-row .completion{font-size:1.4rem;color:#6a8691}.challenge-row.is-complete .completion{color:#247b84}.challenge-row.is-complete 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0;border:1px solid #cedfe3;border-radius:5px;font-size:.96rem;line-height:1.6;cursor:pointer}.challenge-assessment label:has(input:checked){background:#e6eff1;border-color:#528f99}.challenge-assessment input{flex-shrink:0;margin-top:6px;accent-color:#247b84;width:16px;height:16px}.question-feedback{font-size:.91rem;margin:14px 0 0;color:#47616b}.question-feedback:empty{display:none}.question-feedback.is-wrong{color:#884335}.question-feedback.is-right{color:#216650}.assessment-feedback{font-weight:700;margin:22px 0}.challenge-assessment button:disabled{opacity:.55;cursor:not-allowed}.practical-checks{margin:20px 0 26px}.challenge-assessment [data-completion-feedback]{font-size:.94rem;color:#526c78}.challenge-pagination{display:flex;justify-content:space-between;gap:25px;margin-top:40px;padding:25px 0;border-top:1px solid #cedfe3;line-height:1.6;font-weight:650;color:#247b84}.course-diagram{margin:30px 0}.course-diagram img{width:100%;height:auto;border:1px solid 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@media(max-width:1000px){.challenge-layout{grid-template-columns:170px minmax(0,1fr);gap:35px}.challenge-intro{gap:40px}.challenge-phases{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:760px){.challenge-intro{grid-template-columns:1fr;gap:25px;padding-top:28px}.challenge-plan ol{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}.challenge-layout{display:block}.challenge-toc{position:static;border-bottom:1px solid #cedfe3;padding-bottom:20px;margin-bottom:25px}.challenge-toc ol{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.challenge-toc>a{margin-top:10px}.challenge-phase header{display:block}.challenge-phases{grid-template-columns:repeat(2,minmax(0,1fr))}.challenge-progress{grid-template-columns:1fr}.challenge-progress progress{margin:8px 0}.challenge-lesson-heading{margin-top:30px}.challenge-pagination{font-size:.95rem}}
@media(max-width:480px){.challenge-overview,.challenge-lesson{padding-top:28px}.challenge-intro h1{font-size:2.9rem}.challenge-intro .hero-actions{align-items:start;gap:20px}.challenge-plan{padding:22px}.challenge-plan ol{display:block}.challenge-row{grid-template-columns:35px minmax(0,1fr) 20px;gap:12px;padding:23px 0}.day-index{font-size:1.35rem}.challenge-row h3{font-size:1.12rem}.challenge-row p{font-size:.94rem}.lesson-objectives{padding:20px}.challenge-reading .prose{font-size:1.03rem}.lesson-solution{padding-inline:14px}.challenge-reading .prose pre{padding:18px 14px}.challenge-toc ol{display:block}.challenge-toc li{margin:8px 0}.challenge-assessment label{padding:10px}.challenge-lesson-heading h1{font-size:2.4rem}}
.challenge-page .hero-actions .text-link{color:#247b84}.challenge-reading .course-diagram a{display:block}.challenge-reading .course-diagram a:focus-visible{outline:3px solid #247b84;outline-offset:4px}