/* Reading guides use the site's original blue, yellow, and paper-card design. */
* { box-sizing: border-box; }
body { margin: 0; font-size: 17px; }
button, input, select { font: inherit; }
a { color: inherit; }
header { position: sticky; top: 0; z-index: 10; }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin: auto; padding: 16px 28px; }
.brand { text-decoration: none; }
.brand span { display: inline-grid; place-items: center; width: 35px; height: 35px; }
.topics-nav { display: flex; align-items: center; gap: 25px; }
.topics-nav a { text-decoration: none; }
.topics-nav [aria-current="page"] { text-decoration: underline; text-decoration-thickness: 3px; text-decoration-color: var(--yellow); text-underline-offset: 8px; }
.wrap { margin: 0 auto; padding: 0 28px; max-width: 1180px; }
.paper { background: white; border: 2px solid var(--ink); border-radius: 5px; box-shadow: 6px 6px 0 var(--ink); }
.eyebrow { font-size: 12px; font-weight: 850; line-height: 1.5; text-transform: uppercase; margin: 0 0 14px; }
.small { color: var(--muted); font-size: 14px; line-height: 1.65; }
h1, h2, h3 { line-height: 1.18; }
h2 { font-size: clamp(27px, 3.2vw, 37px); margin: 0 0 22px; }
h3 { font-size: 21px; margin: 0 0 14px; }
p { margin: 0 0 20px; }
.guide-breadcrumb { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; padding: 24px 0; font-size: 13px; font-weight: 750; }
.guide-hero { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, .8fr); gap: 35px; align-items: center; padding: clamp(24px, 4vw, 46px); border-top: 8px solid var(--yellow); }
.guide-hero h1 { font-size: clamp(40px, 5.4vw, 64px); letter-spacing: -2px; line-height: 1.05; margin: 0 0 18px; }
.guide-subtitle { font-size: 23px; line-height: 1.4; font-weight: 800; max-width: 28ch; }
.guide-hero > div > p:not(.eyebrow):not(.guide-subtitle) { color: var(--muted); }
.guide-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0 14px; }
.guide-meta span { background: #fff2be; border: 1px solid #bba66e; border-radius: 3px; padding: 5px 9px; font-size: 12px; font-weight: 750; }
.guide-reviewed { font-size: 12px; margin: 0; }
.guide-hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin: 24px 0; }
.guide-hero-actions a { font-size: 14px; font-weight: 850; }
.guide-start-link { white-space: nowrap; }
.guide-illustration { margin: 0; }
.guide-illustration img { display: block; width: 100%; border: 2px solid var(--ink); border-radius: 4px; }
.guide-illustration figcaption { font-size: 21px; font-weight: 850; line-height: 1.55; margin: 20px 0 0; border-left: 5px solid var(--yellow); padding-left: 18px; }
.guide-start { display: grid; grid-template-columns: 1fr 1fr; gap: 35px; padding: 30px 36px; margin: 30px 0 38px; background: #fff9df; }
.guide-start h2 { font-size: 29px; }
.guide-start ul { padding-left: 21px; margin: 0; }
.guide-start li { padding-left: 3px; margin-bottom: 12px; }
.guide-start li:last-child { margin-bottom: 0; }
.guide-objectives { border-left: 2px solid #dacb9b; padding-left: 32px; }
.guide-objectives .small { margin-top: 20px; margin-bottom: 0; }
.guide-layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); align-items: start; gap: 30px; }
.guide-sidebar { position: sticky; top: 100px; }
.guide-outline { max-height: calc(100vh - 125px); overflow-y: auto; padding: 20px 16px; }
.guide-outline summary { font-weight: 900; font-size: 18px; cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.guide-outline summary::after { content: '−'; }
.guide-outline:not([open]) summary::after { content: '+'; }
.guide-outline ol { padding: 0; list-style: none; margin: 18px 0 0; }
.guide-outline li + li { border-top: 1px solid #dde1e6; }
.guide-outline li a { display: flex; align-items: baseline; gap: 10px; text-decoration: none; padding: 11px 4px; font-size: 13px; font-weight: 800; line-height: 1.35; }
.guide-outline li a:hover { background: #fff2be; }
.guide-outline li span { color: var(--blue); font-size: 11px; }
.guide-outline small { display: block; font-size: 10px; font-weight: 600; margin-top: 4px; color: var(--muted); }
.guide-outline-extra { border-top: 2px solid var(--ink); padding-top: 12px; margin-top: 12px; display: grid; gap: 10px; font-size: 12px; font-weight: 800; }
.guide-reading { min-width: 0; }
.guide-reading > section, .guide-reading > details { margin: 0 0 30px; scroll-margin-top: 105px; }
.guide-lesson, .guide-reference, .guide-practice { padding: clamp(24px, 3.5vw, 38px); }
.guide-lesson > p:not(.eyebrow):not(.guide-goal):not(.guide-takeaway):not(.guide-citations) { color: #293742; line-height: 1.8; }
.guide-goal { border-bottom: 1px solid #d8dfe5; padding-bottom: 20px; color: var(--muted); font-size: 15px; }
.guide-scenario { background: #e5f3ff; border-left: 5px solid var(--navy); border-radius: 3px; padding: 22px; margin: 24px 0; }
.guide-scenario .eyebrow { font-size: 10px; margin-bottom: 10px; }
.guide-scenario h3 { font-size: 20px; }
.guide-scenario p { font-size: 15px; line-height: 1.75; }
.guide-scenario p:last-child { margin-bottom: 0; }
.guide-takeaway { background: #fff3be; padding: 15px 18px; font-size: 15px; line-height: 1.7; }
.guide-citations { font-size: 11px; line-height: 1.65; color: #4a5b68; margin: 20px 0 0; overflow-wrap: anywhere; }
.guide-citations a:hover { color: var(--ink); }
.guide-glossary { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin: 0; }
.guide-glossary > div { border-top: 3px solid var(--yellow); padding-top: 12px; }
.guide-glossary dt { font-weight: 850; margin-bottom: 7px; }
.guide-glossary dd { font-size: 14px; color: var(--muted); margin: 0; line-height: 1.7; }
.guide-faq { border-bottom: 1px solid #cdd5dc; padding: 18px 0; }
.guide-faq:last-child { border-bottom: 0; padding-bottom: 0; }
.guide-faq summary { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; cursor: pointer; font-weight: 800; list-style: none; }
.guide-faq summary::after { content: '+'; flex-shrink: 0; }
.guide-faq[open] summary::after { content: '−'; }
.guide-faq > p:not(.guide-citations) { margin-top: 16px; font-size: 15px; color: var(--muted); }
.guide-practice { background: #fff2be; border-top: 8px solid var(--ink); }
.guide-practice-features { display: flex; flex-wrap: wrap; gap: 9px; margin: 24px 0; }
.guide-practice-features span { background: white; border: 1px solid var(--ink); border-radius: 3px; padding: 6px 9px; font-size: 12px; font-weight: 750; }
.btn { display: inline-block; background: var(--yellow); border: 2px solid var(--ink); border-radius: 4px; padding: 12px 20px; box-shadow: 4px 4px 0 var(--ink); font-weight: 850; color: var(--ink); text-decoration: none; line-height: 1.5; }
.btn:hover { background: #ffe58e; box-shadow: 2px 2px 0 var(--ink); }
.guide-practice .small { margin-bottom: 20px; }
.guide-related { font-size: 14px; font-weight: 800; }
.guide-source-list { padding-left: 20px; font-size: 13px; line-height: 1.7; }
.guide-source-list li { padding-left: 4px; margin-bottom: 13px; overflow-wrap: anywhere; }
.guide-source-list li:last-child { margin-bottom: 0; }
.guide-extra { padding: 22px 26px; }
.guide-extra summary { cursor: pointer; font-weight: 800; }
.guide-extra-content { margin-top: 22px; font-size: 15px; }
.guide-calculator { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.guide-calculator label { display: block; font-size: 13px; font-weight: 800; margin-bottom: 7px; }
.guide-calculator input { width: 100%; min-width: 0; padding: 10px; border: 2px solid var(--ink); border-radius: 4px; }
.guide-calculator-result { grid-column: 1 / -1; display: flex; gap: 40px; background: #e5f3ff; padding: 16px 20px; }
.guide-calculator-result p { margin: 0; }
.guide-calculator-result strong { display: block; font-size: 24px; }
.foot { display: flex; align-items: flex-start; justify-content: space-between; gap: 35px; }
.foot p { max-width: 650px; font-size: 12px; margin: 18px 0 0; }
.foot > a { white-space: nowrap; }
.skip { position: absolute; left: -10000px; }
.skip:focus { left: 12px; top: 12px; z-index: 20; background: white; padding: 10px; }
@media (max-width: 950px) {
  .guide-layout { grid-template-columns: 210px minmax(0, 1fr); gap: 22px; }
  .guide-hero { grid-template-columns: minmax(0, 1.4fr) minmax(0, .7fr); gap: 24px; }
  .guide-illustration figcaption { font-size: 17px; }
  .guide-start { padding: 28px; gap: 26px; }
  .guide-objectives { padding-left: 25px; }
}
@media (max-width: 760px) {
  .guide-layout { display: block; }
  .guide-sidebar { position: static; margin-bottom: 28px; }
  .guide-outline { max-height: none; }
  .guide-outline ol { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
  .guide-outline-extra { display: flex; flex-wrap: wrap; gap: 12px 20px; }
  .guide-hero { grid-template-columns: 1fr; }
  .guide-illustration { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: center; }
  .guide-illustration figcaption { margin: 0; font-size: 17px; }
  .guide-start { grid-template-columns: 1fr; }
  .guide-objectives { border-left: 0; border-top: 2px solid #dacb9b; padding: 24px 0 0; }
  .guide-reading > section, .guide-reading > details { scroll-margin-top: 155px; }
}
@media (max-width: 650px) {
  .nav { padding: 14px 20px; flex-wrap: wrap; gap: 13px; }
  .topics-nav { width: 100%; gap: 22px; }
  .topics-nav a { font-size: 13px; }
  .nav .brand { font-size: 21px; }
  .wrap { padding-left: 18px; padding-right: 24px; }
  .guide-hero { padding: 24px; }
  .guide-hero h1 { font-size: 40px; letter-spacing: -1.5px; }
  .guide-subtitle { font-size: 21px; }
  .guide-illustration { gap: 14px; }
  .guide-illustration figcaption { font-size: 14px; border-left-width: 3px; padding-left: 12px; }
  .guide-start { padding: 24px; }
  .guide-start h2 { font-size: 27px; }
  .guide-lesson, .guide-reference, .guide-practice { padding: 23px; }
  .guide-lesson > p { font-size: 16px; }
  .guide-glossary { grid-template-columns: 1fr; }
  .guide-scenario { padding: 17px; }
  .guide-practice .btn { font-size: 15px; padding: 11px 14px; }
  .foot { display: block; }
  .foot > a { display: inline-block; margin-top: 20px; }
}
@media (max-width: 400px) {
  .topics-nav { gap: 15px; }
  .guide-hero h1 { font-size: 36px; }
  .guide-outline ol { grid-template-columns: 1fr; }
  .guide-hero, .guide-start, .guide-lesson, .guide-reference, .guide-practice { padding: 20px; }
  .guide-calculator { grid-template-columns: 1fr; }
}
@media print {
  body { background: white; font-size: 11pt; }
  header, .guide-breadcrumb, .guide-sidebar, .guide-illustration, .guide-practice, .guide-extra, footer { display: none; }
  .wrap { padding: 0; max-width: none; }
  .paper { box-shadow: none; border: 0; }
  .guide-hero, .guide-start, .guide-layout { display: block; margin: 0; padding: 0; }
  .guide-objectives { border: 0; padding: 0; margin: 24px 0; }
  .guide-lesson, .guide-reference { padding: 0; }
  h2, h3 { break-after: avoid; }
  .guide-scenario, .guide-takeaway { break-inside: avoid; }
}