.guide-hero { max-width: 860px; margin: 32px 0 36px; }
.guide-hero h1 { max-width: 21ch; margin: 12px 0 18px; font-size: clamp(29px, 4.5vw, 46px); line-height: 1.35; letter-spacing: -.055em; word-break: keep-all; overflow-wrap: anywhere; }
.guide-byline { margin: 0 0 26px; color: var(--muted); font-size: 13px; }
.guide-answer { padding: 24px 28px; border-left: 4px solid var(--accent); border-radius: 0 14px 14px 0; background: var(--accent-soft); }
.guide-answer__label { display: block; margin-bottom: 9px; color: var(--accent-dark); font-size: 12px; font-weight: 750; }
.guide-answer p { margin: 0; color: var(--ink); font-size: 17px; line-height: 1.85; word-break: keep-all; overflow-wrap: anywhere; }
.guide-toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 28px; padding: 18px 0; border-block: 1px solid var(--line); }
.guide-toc a { display: inline-flex; align-items: center; min-height: 44px; padding: 8px 12px; border-radius: 8px; background: white; color: var(--ink); font-size: 13px; text-decoration: none; }
.guide-toc a:hover { background: var(--accent-soft); color: var(--accent-dark); }
.guide-reading-body { max-width: 860px; }
.guide-section { padding: 32px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 90px; }
.guide-section h2, .guide-next h2, .guide-related h2, .guide-hub-route h2, .guide-hub-topics h2, .guide-discovery h2 { margin: 0 0 16px; font-size: clamp(20px, 2.5vw, 25px); line-height: 1.5; letter-spacing: -.04em; word-break: keep-all; overflow-wrap: anywhere; }
.guide-section p { max-width: 77ch; margin: 14px 0; font-size: 15px; line-height: 1.95; word-break: keep-all; overflow-wrap: anywhere; }
.guide-example { margin: 24px 0; padding: 24px; border: 1px solid var(--line); border-radius: 16px; background: white; }
.guide-example .guide-example__label { margin: 0 0 14px; color: var(--muted); font-size: 12px; font-weight: 650; }
.guide-example p:last-child { margin-bottom: 0; }
.guide-example .guide-equation { margin-block: 20px; color: var(--accent-dark); font-size: clamp(17px, 2.6vw, 23px); font-weight: 700; font-variant-numeric: tabular-nums; }
.guide-table-wrap { max-width: 100%; overflow-x: auto; margin: 18px 0; border: 1px solid var(--line); border-radius: 10px; }
.guide-table { width: 100%; min-width: 440px; border-collapse: collapse; text-align: left; font-size: 14px; line-height: 1.7; }
.guide-table caption { padding: 12px 16px; color: var(--muted); font-size: 12px; text-align: left; background: white; }
.guide-table th, .guide-table td { padding: 12px 16px; border-top: 1px solid var(--line); vertical-align: top; }
.guide-table thead { background: var(--subtle); }
.guide-table tbody { background: white; }
.guide-table tbody th { min-width: 90px; }
.guide-table td { font-variant-numeric: tabular-nums; }
.guide-calculations { display: grid; gap: 14px; margin: 24px 0 0; }
.guide-calculations dt { color: var(--muted); font-size: 13px; }
.guide-calculations dd { margin: 5px 0 0; font-size: 16px; font-variant-numeric: tabular-nums; }
.guide-steps { display: grid; gap: 20px; padding-left: 25px; margin: 20px 0; }
.guide-steps li { padding-left: 8px; line-height: 1.8; }
.guide-steps li::marker { color: var(--accent-dark); font-weight: 750; }
.guide-steps strong, .guide-steps span { display: block; }
.guide-steps strong { color: var(--ink); font-size: 16px; }
.guide-steps span { margin-top: 4px; color: var(--muted); font-size: 14px; }
.guide-sources ul { list-style: none; margin: 20px 0; padding: 0; }
.guide-sources li { margin: 0; padding: 14px 0; border-bottom: 1px dashed var(--line); }
.guide-sources li a { font-size: 14px; line-height: 1.8; }
.guide-sources li p { margin: 5px 0 0; color: var(--muted); font-size: 13px; }
.guide-faq details { padding: 4px 0; border-top: 1px solid var(--line); }
.guide-faq summary { padding: 15px 2px; font-size: 15px; font-weight: 650; line-height: 1.7; cursor: pointer; }
.guide-faq details p { margin: 0 0 18px; padding-left: 20px; color: var(--muted); }
.guide-next { margin: 36px 0; padding: 28px; border: 1px solid #d5d5f2; border-radius: 16px; background: var(--accent-soft); }
.guide-next > p { max-width: 72ch; color: var(--muted); font-size: 14px; line-height: 1.85; }
.guide-next h2 { margin-bottom: 10px; }
.guide-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.guide-actions a { min-height: 44px; white-space: normal; text-align: center; text-decoration: none; }
.guide-related { margin: 52px 0 12px; }
.guide-related > p { margin-top: 20px; color: var(--muted); font-size: 13px; }
.guide-discovery { margin: 36px 0; padding-top: 12px; scroll-margin-top: 80px; }
.guide-discovery__heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 20px; }
.guide-discovery__heading h2 { margin-bottom: 8px; }
.guide-discovery__heading p:not(.eyebrow) { margin: 0; color: var(--muted); font-size: 14px; }
.guide-discovery__heading > a { display: inline-flex; align-items: center; min-height: 44px; flex: 0 0 auto; font-size: 13px; }
.guide-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.guide-card { display: flex; flex-direction: column; align-items: start; min-width: 0; padding: 24px; border: 1px solid var(--line); border-radius: 16px; background: white; color: var(--ink); text-decoration: none; transition: border-color .15s ease, background-color .15s ease; }
.guide-card:hover { border-color: var(--accent); background: #fcfcff; }
.guide-card__kicker { margin-bottom: 20px; color: var(--accent-dark); font-size: 12px; font-weight: 650; }
.guide-card h3 { margin: 0 0 12px; font-size: 18px; line-height: 1.65; letter-spacing: -.04em; word-break: keep-all; overflow-wrap: anywhere; }
.guide-card p { margin: 0 0 20px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.guide-card__action { display: flex; justify-content: space-between; gap: 16px; width: 100%; margin-top: auto; padding-top: 16px; border-top: 1px solid var(--line); color: var(--accent-dark); font-size: 13px; font-weight: 600; }
.guide-related .guide-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.guide-hub-hero { margin-bottom: 48px; }
.guide-hub-hero h1 { max-width: none; }
.guide-hub-intro { margin: 0 0 28px; color: var(--muted); font-size: 18px; line-height: 1.85; }
.guide-hub-route { display: grid; grid-template-columns: .8fr 1fr; gap: 48px; margin: 44px 0; padding: 32px 0; border-block: 1px solid var(--line); }
.guide-hub-route > div > p:not(.eyebrow) { color: var(--muted); font-size: 14px; line-height: 1.85; }
.guide-hub-route .guide-steps { margin-block: 0; }
.guide-visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
:is(.guide-card, .guide-toc a, .guide-faq summary, .guide-table-wrap, .guide-actions a):focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
@media (max-width: 760px) {
  .guide-cards { grid-template-columns: 1fr; }
  .guide-card { padding: 22px; }
  .guide-card__kicker { margin-bottom: 10px; }
  .guide-card p { margin-bottom: 14px; }
  .guide-discovery__heading { align-items: start; flex-direction: column; gap: 8px; }
  .guide-hub-route { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 520px) {
  .guide-hero { margin-top: 22px; }
  .guide-answer { padding: 20px; }
  .guide-answer p { font-size: 16px; }
  .guide-example, .guide-next { padding: 18px; }
  .guide-section { padding: 26px 0; }
  .guide-section p { font-size: 14px; }
  .guide-table th, .guide-table td { padding: 10px 12px; }
  .guide-related .guide-cards { grid-template-columns: 1fr; }
  .guide-actions { flex-direction: column; align-items: stretch; }
  .guide-toc { gap: 6px; }
  .guide-toc a { padding: 8px 10px; font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) { .guide-card { transition: none; } }