/* The written exercise keeps every source and answer on the page. */
.challenge-page { background: var(--paper); }
.challenge-page h1 { max-width: 800px; font-size: clamp(4rem, 6vw, 6.8rem); }
.challenge-page h2 { font-size: clamp(2.6rem, 4.5vw, 4.6rem); }
.challenge-page :is(section, article, div)[id] { scroll-margin-top: 2rem; }
.challenge-hero { padding-block: clamp(4rem, 7vw, 7rem); border-bottom: 1px solid var(--ink); }
.challenge-hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: clamp(2.5rem, 6vw, 6rem); align-items: center; }
.challenge-hero .hero-lead { max-width: 39rem; }
.challenge-hero-card { position: relative; min-height: 485px; padding: 1.3rem; overflow: hidden; border: 1px solid var(--ink); background: #dce1d1; box-shadow: 13px 13px 0 var(--lime); }
.challenge-hero-card::before { content: ""; position: absolute; inset: 0; opacity: .32; background: repeating-linear-gradient(90deg, transparent 0, transparent 29px, #8b9889 30px), repeating-linear-gradient(0deg, transparent 0, transparent 29px, #8b9889 30px); }
.preview-top { position: relative; display: flex; justify-content: space-between; gap: 1rem; font-size: 9px; font-weight: 900; letter-spacing: .13em; }
.preview-paper { position: relative; width: min(85%, 390px); margin: 3.7rem auto 0; padding: 1.2rem; border: 1px solid var(--ink); background: var(--white); box-shadow: 9px 9px 0 rgba(21,28,24,.2); transform: rotate(-2deg); }
.paper-kicker { font-size: 9px; font-weight: 900; letter-spacing: .16em; }
.preview-paper h2 { margin: 1.1rem 0 1.7rem; font-size: clamp(2rem, 3vw, 2.8rem); line-height: 1.03; }
.paper-row { display: grid; grid-template-columns: 25px 1fr 18px; gap: .5rem; padding: .65rem .1rem; border-top: 1px solid var(--line); font-size: 12px; }
.paper-row span:first-child { color: var(--muted); font-size: 10px; }
.paper-row span:last-child { color: #6b8b26; font-weight: 900; }
.preview-paper p { margin: 1rem 0 0; padding: .75rem; background: var(--lime); font-size: 10px; font-weight: 900; }
.preview-seal { position: absolute; right: .9rem; bottom: 1.4rem; display: grid; place-items: center; width: 96px; height: 96px; border: 2px solid var(--ink); border-radius: 50%; background: var(--lime); transform: rotate(9deg); font-size: 11px; font-weight: 900; line-height: 1.05; text-align: center; }

.challenge-overview { display: grid; grid-template-columns: 1fr .83fr; gap: clamp(2.5rem, 9vw, 9rem); padding-block: clamp(4.5rem, 8vw, 7rem); }
.challenge-overview h2 { max-width: 550px; margin-bottom: 1.5rem; }
.challenge-overview p, .challenge-overview li { color: var(--ink-soft); line-height: 1.7; }
.challenge-overview ol { padding-left: 1.3rem; }
.challenge-overview li { padding-left: .5rem; margin-bottom: .55rem; }
.overview-side { padding: 1.8rem; align-self: start; border: 1px solid var(--ink); background: var(--white); box-shadow: 8px 8px 0 var(--lime); }
.overview-side h2 { margin-bottom: 1.5rem; font-size: clamp(2.1rem, 3vw, 2.8rem); }
.overview-side p:last-child { margin-bottom: 0; }
.challenge-ribbon { background: var(--lime); border-block: 1px solid var(--ink); }
.challenge-ribbon .shell { display: flex; justify-content: space-between; gap: 1rem; align-items: center; min-height: 57px; font-size: 10px; font-weight: 900; letter-spacing: .12em; }

.challenge-layout { display: grid; grid-template-columns: 235px minmax(0, 1fr); gap: clamp(2.5rem, 7vw, 7rem); padding-block: clamp(4rem, 7vw, 7rem); }
.step-rail { position: sticky; top: 2rem; align-self: start; }
.step-rail > p:first-child { margin-bottom: 1.2rem; font-size: 10px; font-weight: 900; letter-spacing: .14em; }
.step-rail ol { margin: 0; padding: 0; border-top: 1px solid var(--ink); list-style: none; }
.step-rail li { border-bottom: 1px solid var(--line); }
.step-rail a { display: flex; gap: .9rem; padding: .92rem 0; text-decoration: none; font-size: 12px; font-weight: 800; }
.step-rail a:hover, .step-rail a:focus-visible { color: #638327; }
.step-rail a span { color: #70825a; }
.step-rail .rail-check { padding-block: 1.3rem; }
.step-rail .rail-note { margin-top: 1.6rem; color: var(--muted); font-size: 11px; line-height: 1.6; }
.step-stack { min-width: 0; border-top: 1px solid var(--ink); }
.challenge-step { padding-block: 3.7rem 4.4rem; border-bottom: 1px solid var(--ink); }
.challenge-step:first-child { padding-top: 1.3rem; }
.step-topline { display: flex; justify-content: space-between; gap: 1rem; margin-bottom: 1.5rem; color: #627457; font-size: 10px; font-weight: 900; letter-spacing: .14em; }
.challenge-step > h2 { max-width: 770px; margin-bottom: 2rem; line-height: 1.02; }
.step-content { font-size: 15px; line-height: 1.75; color: var(--ink-soft); }
.step-content > p:first-child { margin-bottom: 1.7rem; padding: .9rem 1.1rem; border-left: 4px solid var(--lime); background: #e9eadf; color: var(--ink); font-weight: 700; }
.step-content h3, .answer-content h3 { margin: 2.3rem 0 .8rem; color: var(--ink); font: 500 clamp(1.85rem, 2.7vw, 2.4rem)/1.1 var(--display); letter-spacing: -.035em; }
.step-content h4, .answer-content h4 { margin: 1.5rem 0 .5rem; color: var(--ink); font-size: 13px; letter-spacing: .01em; }
.step-content p, .answer-content p { margin-bottom: 1rem; }
.step-content li, .answer-content li { margin-bottom: .5rem; padding-left: .3rem; }
.step-content ul, .step-content ol, .answer-content ul, .answer-content ol { padding-left: 1.3rem; }
.step-content blockquote { margin: 1.4rem 0; padding: 1.4rem; border-left: 4px solid var(--lime); background: var(--white); color: var(--ink); }
.step-content h3 + p { margin-top: 0; }
.copy-tools { display: flex; flex-wrap: wrap; align-items: center; gap: .7rem 1rem; margin: .2rem 0 1.6rem; }
.copy-button { padding: .65rem .85rem; border: 1px solid var(--ink); background: var(--lime); color: var(--ink); font: 900 11px/1.3 var(--body); cursor: pointer; }
.copy-button:hover { background: #d0ed8c; }
.copy-button:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }
.copy-status { color: var(--ink-soft); font-size: 12px; line-height: 1.5; }
.copy-fallback { width: 100%; min-height: 11rem; padding: .8rem; border: 1px solid var(--ink); background: var(--white); color: var(--ink); font: 13px/1.5 monospace; resize: vertical; }
.copy-fallback[hidden] { display: none; }
.step-content table, .answer-content table { display: block; max-width: 100%; margin: 1.4rem 0; overflow-x: auto; border-collapse: collapse; background: var(--white); font-size: 13px; }
.step-content th, .step-content td, .answer-content th, .answer-content td { padding: .7rem; border: 1px solid var(--line); text-align: left; vertical-align: top; min-width: 105px; }
.step-content th, .answer-content th { background: #e4e9d6; color: var(--ink); }
.step-content hr { border: 0; border-top: 1px solid var(--line); }
.worked-answer { margin: 2.6rem 0 1.8rem; border: 1px solid var(--ink); background: var(--white); }
.worked-answer > summary { display: flex; justify-content: space-between; gap: 1rem; align-items: center; padding: 1.1rem 1.3rem; cursor: pointer; list-style: none; font-weight: 900; }
.worked-answer > summary::-webkit-details-marker { display: none; }
.answer-indicator { font-size: 11px; color: #4d6530; white-space: nowrap; }
.answer-indicator .answer-hide { display: none; }
.worked-answer[open] .answer-indicator .answer-show { display: none; }
.worked-answer[open] .answer-indicator .answer-hide { display: inline; }
.answer-indicator .answer-symbol { display: inline-grid; place-items: center; margin-left: .4rem; width: 24px; height: 24px; border: 1px solid var(--ink); border-radius: 50%; background: var(--lime); color: var(--ink); font-size: 16px; transition: transform .2s ease; }
.worked-answer[open] .answer-indicator .answer-symbol { transform: rotate(45deg); }
.answer-content { padding: 1.4rem; border-top: 1px solid var(--ink); color: var(--ink-soft); font-size: 14px; line-height: 1.7; }
.answer-content > :first-child { margin-top: 0; }
.answer-content > :last-child { margin-bottom: 0; }
.checkpoint { margin-top: 1.7rem; padding: 1.3rem 1.4rem; border-left: 4px solid var(--ink); background: var(--lime); font-size: 13px; line-height: 1.65; }
.checkpoint p { margin-bottom: .45rem; }
.checkpoint p:last-child { margin-bottom: 0; }
.checkpoint-label { font-size: 9px; font-weight: 900; letter-spacing: .15em; }
.step-next { display: inline-flex; justify-content: space-between; align-items: center; gap: 3rem; margin-top: 1.5rem; padding: .9rem 0; border-bottom: 2px solid var(--ink); text-decoration: none; font-size: 12px; font-weight: 900; text-transform: uppercase; letter-spacing: .06em; }
.step-next:hover { color: #668818; border-color: #668818; }

.completion-section { padding-block: clamp(4rem, 8vw, 7rem); background: var(--ink); color: var(--paper); }
.completion-grid { display: grid; grid-template-columns: minmax(0, .75fr) minmax(0, 1.25fr); gap: clamp(2.5rem, 8vw, 7rem); }
.completion-grid h2 { max-width: 460px; }
.completion-grid > div:first-child > p:last-child { max-width: 430px; color: #c8d1c6; line-height: 1.7; }
.completion-card { padding: clamp(1.2rem, 3vw, 2.1rem); border: 1px solid var(--lime); background: var(--paper); color: var(--ink); box-shadow: 11px 11px 0 var(--lime); }
.check-item { display: flex; gap: .9rem; align-items: flex-start; padding: .9rem 0; border-bottom: 1px solid var(--line); font-size: 13px; line-height: 1.5; cursor: pointer; }
.check-item input { width: 19px; height: 19px; margin: .05rem 0 0; flex: 0 0 auto; accent-color: #759b2e; }
.storage-note { margin: 1.1rem 0 0; color: var(--muted); font-size: 11px; line-height: 1.55; }
.reset-checks { margin-top: 1.4rem; padding: .65rem .8rem; border: 1px solid var(--ink); background: transparent; cursor: pointer; font-size: 11px; font-weight: 900; }
.reset-checks:hover { background: var(--lime); }
.check-status { min-height: 1.5em; margin: .7rem 0 0; color: var(--ink-soft); font-size: 11px; }
.completion-note { margin: 1.2rem 0 0; color: var(--muted); font-size: 11px; line-height: 1.65; }
.completion-note p { margin: 0; }
.next-work { display: grid; grid-template-columns: 1fr .53fr; gap: clamp(2.5rem, 9vw, 8rem); }
.next-work h2 { max-width: 600px; }
.next-work p, .next-work li { max-width: 650px; color: var(--ink-soft); line-height: 1.7; }
.next-work-card { align-self: start; padding: 1.6rem; border: 1px solid var(--ink); background: var(--white); box-shadow: 8px 8px 0 var(--lime); }
.next-work-card span { font-size: 10px; font-weight: 900; letter-spacing: .13em; }
.next-work-card p { margin: 1.5rem 0; font: 500 1.8rem/1.12 var(--display); letter-spacing: -.035em; }
.challenge-updates[hidden] { display: none; }
.challenge-updates { padding-block: clamp(4rem, 7vw, 6rem); border-top: 1px solid var(--ink); background: var(--paper-dark); }
.updates-grid { display: grid; grid-template-columns: 1fr .8fr; gap: clamp(2.5rem, 9vw, 8rem); align-items: center; }
.updates-grid h2 { max-width: 620px; }
.updates-grid p:not(.eyebrow) { max-width: 530px; color: var(--ink-soft); line-height: 1.7; }
.updates-panel { display: grid; gap: 1rem; padding: clamp(1.4rem, 3vw, 2rem); border: 1px solid var(--ink); background: var(--white); box-shadow: 9px 9px 0 var(--lime); }
.updates-panel > label:first-child { font-size: 11px; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.updates-panel input[type="email"] { min-height: 52px; width: 100%; padding: .8rem; border: 1px solid var(--ink); border-radius: 0; background: var(--paper); color: var(--ink); font: inherit; }
.updates-consent { display: flex; gap: .7rem; align-items: flex-start; font-size: 12px; line-height: 1.5; }
.updates-consent input { flex: 0 0 auto; width: 18px; height: 18px; margin: .1rem 0 0; accent-color: #759b2e; }
.updates-panel .button { width: 100%; cursor: pointer; }
.updates-panel .button:disabled { cursor: wait; opacity: .6; }
.updates-panel #updates-status { min-height: 1.5em; margin: 0; font-size: 12px; }
.challenge-handoff { padding-block: clamp(4rem, 7vw, 7rem); background: #283a2e; color: var(--paper); }
.handoff-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, .65fr); gap: clamp(2.5rem, 10vw, 9rem); align-items: center; }
.handoff-grid h2 { max-width: 690px; }
.handoff-grid p:not(.eyebrow) { max-width: 650px; color: #d1dccf; line-height: 1.7; }
.handoff-action { padding: 1.6rem; border: 1px solid var(--lime); }
.handoff-action > span { color: var(--lime); font-size: 10px; font-weight: 900; letter-spacing: .14em; }
.handoff-action p { margin: 1.7rem 0; font-size: 13px; }
.handoff-action .button { width: 100%; }

@media (max-width: 1050px) {
  .challenge-layout { grid-template-columns: 190px minmax(0, 1fr); gap: 2.5rem; }
  .challenge-hero-card { min-height: 445px; }
}
@media (max-width: 760px) {
  .challenge-hero-grid, .challenge-overview, .challenge-layout, .completion-grid, .next-work, .updates-grid, .handoff-grid { grid-template-columns: 1fr; }
  .challenge-page h1 { font-size: clamp(3.6rem, 11vw, 5.8rem); }
  .challenge-hero { padding-block: 3.7rem 5rem; }
  .challenge-hero-card { min-height: 420px; max-width: 560px; }
  .overview-side { margin-right: 8px; }
  .challenge-ribbon .shell { justify-content: center; flex-wrap: wrap; padding-block: 1rem; font-size: 9px; }
  .step-rail { position: static; }
  .step-rail ol { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 1rem; }
  .step-rail .rail-note { margin-top: 0; }
  .challenge-layout { gap: 2rem; }
  .challenge-step { padding-block: 3rem; }
  .completion-grid { gap: 2rem; }
  .completion-card { margin-right: 10px; }
}
@media (max-width: 430px) {
  .challenge-page h1 { font-size: clamp(3.3rem, 13vw, 4.3rem); }
  .challenge-hero-card { min-height: 385px; }
  .preview-paper { width: 88%; margin-top: 3rem; }
  .preview-seal { width: 67px; height: 67px; right: .4rem; bottom: 1rem; font-size: 8px; }
  .challenge-ribbon span:nth-of-type(2) { display: none; }
  .step-rail ol { grid-template-columns: 1fr; }
  .step-topline { font-size: 9px; }
  .worked-answer > summary { padding-inline: .9rem; }
  .answer-indicator { font-size: 10px; }
}