.hb-jacket-lab {
  --hb-ink: #111111;
  --hb-copy: #333333;
  --hb-muted: #6f6f6f;
  --hb-line: #dedede;
  --hb-soft: #f5f5f5;
  --hb-white: #ffffff;
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  color: var(--hb-copy);
  background: var(--hb-white);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 17px;
  line-height: 1.72;
}
.hb-jacket-lab,
.hb-jacket-lab * { box-sizing: border-box; }
.hb-jacket-lab h1,
.hb-jacket-lab h2,
.hb-jacket-lab h3,
.hb-jacket-lab p,
.hb-jacket-lab ul,
.hb-jacket-lab figure { margin-top: 0; }
.hb-jacket-lab h1 {
  max-width: 980px;
  margin: 0 0 24px;
  color: var(--hb-ink);
  font-size: clamp(36px, 4.4vw, 56px);
  font-weight: 800;
  line-height: 1.07;
  letter-spacing: -0.038em;
}
.hb-jacket-lab h2 {
  margin: 72px 0 22px;
  padding-top: 20px;
  border-top: 2px solid var(--hb-ink);
  color: var(--hb-ink);
  font-size: clamp(27px, 3vw, 37px);
  line-height: 1.18;
  letter-spacing: -0.026em;
  scroll-margin-top: 28px;
}
.hb-jacket-lab h3 {
  margin: 30px 0 12px;
  color: var(--hb-ink);
  font-size: 21px;
  line-height: 1.3;
}
.hb-jacket-lab p { margin-bottom: 18px; }
.hb-jacket-lab ul { margin-bottom: 24px; padding-left: 24px; }
.hb-jacket-lab li { margin-bottom: 9px; }
.hb-jacket-lab a {
  color: var(--hb-ink);
  font-weight: 700;
  text-decoration-color: #8a8a8a;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.hb-jacket-lab a:hover { text-decoration-color: var(--hb-ink); }
.hb-jacket-lab .hb-label {
  display: inline-block;
  margin-bottom: 17px;
  color: var(--hb-muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.hb-jacket-lab .hb-lede {
  max-width: 940px;
  margin-bottom: 30px;
  color: #262626;
  font-size: 20px;
  line-height: 1.65;
}
.hb-jacket-lab .hb-toc {
  margin: 32px 0 44px;
  padding: 22px;
  border: 1px solid var(--hb-line);
  background: var(--hb-soft);
}
.hb-jacket-lab .hb-toc strong {
  display: block;
  margin-bottom: 14px;
  color: var(--hb-ink);
  font-size: 13px;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.hb-jacket-lab .hb-toc-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 7px;
}
.hb-jacket-lab .hb-toc a {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 42px;
  padding: 8px 9px;
  border: 1px solid #c7c7c7;
  background: var(--hb-white);
  font-size: 12px;
  line-height: 1.25;
  text-align: center;
  white-space: nowrap;
  text-decoration: none;
}
.hb-jacket-lab .hb-toc a span {
  flex: 0 0 auto;
  color: var(--hb-muted);
  font-size: 10px;
  font-weight: 800;
}
.hb-jacket-lab .hb-toc a:hover,
.hb-jacket-lab .hb-toc a:focus-visible {
  border-color: var(--hb-ink);
  outline: none;
}
.hb-jacket-lab .hb-float-card {
  display: grid;
  grid-template-columns: minmax(320px, .96fr) minmax(0, 1.04fr);
  margin: 38px 0 54px;
  overflow: hidden;
  border: 1px solid var(--hb-line);
  background: var(--hb-white);
  box-shadow: 0 20px 55px rgba(17,17,17,.12);
  transform: translateY(0);
  transition: transform .42s ease, box-shadow .42s ease;
}
.hb-jacket-lab .hb-float-card:hover {
  box-shadow: 0 32px 75px rgba(17,17,17,.18);
  transform: translateY(-9px);
}
.hb-jacket-lab .hb-float-media {
  position: relative;
  display: block;
  min-height: 510px;
  overflow: hidden;
  background: #eeeeee;
  text-decoration: none;
}
.hb-jacket-lab .hb-float-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: opacity .38s ease, transform .48s ease;
}
.hb-jacket-lab .hb-float-primary { opacity: 1; }
.hb-jacket-lab .hb-float-hover { opacity: 0; }
.hb-jacket-lab .hb-float-media:hover .hb-float-primary,
.hb-jacket-lab .hb-float-media:focus-visible .hb-float-primary { opacity: 0; }
.hb-jacket-lab .hb-float-media.is-single:hover .hb-float-primary,
.hb-jacket-lab .hb-float-media.is-single:focus-visible .hb-float-primary { opacity: 1; }
.hb-jacket-lab .hb-float-media:hover .hb-float-hover,
.hb-jacket-lab .hb-float-media:focus-visible .hb-float-hover {
  opacity: 1;
  transform: scale(1.025);
}
.hb-jacket-lab .hb-float-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px;
}
.hb-jacket-lab .hb-float-copy small {
  margin-bottom: 10px;
  color: var(--hb-muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.hb-jacket-lab .hb-float-copy strong {
  display: block;
  margin-bottom: 14px;
  color: var(--hb-ink);
  font-size: clamp(23px, 2.3vw, 31px);
  line-height: 1.18;
}
.hb-jacket-lab .hb-float-copy p {
  margin-bottom: 13px;
  color: var(--hb-muted);
}
.hb-jacket-lab .hb-product-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: flex-start;
  min-height: 46px;
  margin-top: 8px;
  padding: 11px 18px;
  border: 1px solid var(--hb-ink);
  background: var(--hb-ink);
  color: var(--hb-white);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none;
  transition: background .25s ease, color .25s ease, transform .25s ease;
}
.hb-jacket-lab .hb-product-btn:hover,
.hb-jacket-lab .hb-product-btn:focus-visible {
  background: var(--hb-white);
  color: var(--hb-ink);
  outline: none;
  transform: translateY(-1px);
}
.hb-jacket-lab .hb-float-card.is-reverse .hb-float-media { order: 2; }
.hb-jacket-lab .hb-float-card.is-reverse .hb-float-copy { order: 1; }
.hb-jacket-lab .hb-route-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 30px 0;
  border: 1px solid var(--hb-ink);
  background: var(--hb-white);
}
.hb-jacket-lab .hb-route {
  min-height: 240px;
  padding: 25px;
  border-right: 1px solid var(--hb-line);
}
.hb-jacket-lab .hb-route:last-child { border-right: 0; }
.hb-jacket-lab .hb-route small {
  display: block;
  margin-bottom: 11px;
  color: var(--hb-muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.hb-jacket-lab .hb-route strong {
  display: block;
  margin-bottom: 10px;
  color: var(--hb-ink);
  font-size: 21px;
  line-height: 1.25;
}
.hb-jacket-lab .hb-route p {
  margin: 0;
  color: var(--hb-muted);
  font-size: 15px;
  line-height: 1.55;
}
.hb-jacket-lab .hb-friction-map {
  margin: 32px 0;
  border: 1px solid var(--hb-ink);
  background: var(--hb-white);
}
.hb-jacket-lab .hb-friction-head {
  display: grid;
  grid-template-columns: minmax(130px, .55fr) minmax(0, 1.45fr) minmax(0, 1fr);
  padding: 13px 20px;
  background: var(--hb-ink);
  color: var(--hb-white);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.hb-jacket-lab .hb-friction-row {
  display: grid;
  grid-template-columns: minmax(130px, .55fr) minmax(0, 1.45fr) minmax(0, 1fr);
  align-items: center;
  border-bottom: 1px solid var(--hb-line);
}
.hb-jacket-lab .hb-friction-row:last-child { border-bottom: 0; }
.hb-jacket-lab .hb-friction-row > * { padding: 16px 20px; }
.hb-jacket-lab .hb-friction-row strong { color: var(--hb-ink); }
.hb-jacket-lab .hb-friction-row span,
.hb-jacket-lab .hb-friction-row em {
  color: var(--hb-muted);
  font-size: 14px;
  line-height: 1.5;
  font-style: normal;
}
.hb-jacket-lab .hb-callout {
  margin: 28px 0;
  padding: 22px 24px;
  border-left: 5px solid var(--hb-ink);
  background: var(--hb-soft);
}
.hb-jacket-lab .hb-callout strong { color: var(--hb-ink); }
.hb-jacket-lab .hb-formulas {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0;
  border: 1px solid var(--hb-ink);
  background: var(--hb-line);
}
.hb-jacket-lab .hb-formula {
  padding: 24px;
  background: var(--hb-white);
}
.hb-jacket-lab .hb-formula small {
  color: var(--hb-muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.hb-jacket-lab .hb-formula strong {
  display: block;
  margin: 7px 0 9px;
  color: var(--hb-ink);
  font-size: 19px;
}
.hb-jacket-lab .hb-formula p {
  margin: 0;
  color: var(--hb-muted);
  font-size: 15px;
  line-height: 1.55;
}
.hb-jacket-lab .hb-motion-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: 30px 0;
  border-top: 1px solid var(--hb-ink);
  border-bottom: 1px solid var(--hb-ink);
}
.hb-jacket-lab .hb-motion-step {
  padding: 20px 17px;
  border-right: 1px solid var(--hb-line);
}
.hb-jacket-lab .hb-motion-step:last-child { border-right: 0; }
.hb-jacket-lab .hb-motion-step b {
  display: block;
  margin-bottom: 6px;
  color: var(--hb-ink);
  font-size: 15px;
}
.hb-jacket-lab .hb-motion-step span {
  color: var(--hb-muted);
  font-size: 13px;
  line-height: 1.48;
}
.hb-jacket-lab .hb-next-route {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  margin: 66px 0 18px;
  border: 1px solid var(--hb-ink);
}
.hb-jacket-lab .hb-next-title {
  display: grid;
  place-content: center;
  min-height: 180px;
  padding: 24px;
  background: var(--hb-ink);
  color: var(--hb-white);
  text-align: center;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.2;
}
.hb-jacket-lab .hb-next-links { display: grid; }
.hb-jacket-lab .hb-next-links a {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  align-items: center;
  padding: 15px 20px;
  border-bottom: 1px solid var(--hb-line);
  text-decoration: none;
}
.hb-jacket-lab .hb-next-links a:last-child { border-bottom: 0; }
.hb-jacket-lab .hb-next-links small {
  color: var(--hb-muted);
  font-weight: 400;
}
.hb-jacket-lab .hb-faq {
  margin-top: 58px;
  border-top: 1px solid var(--hb-ink);
}
.hb-jacket-lab .hb-faq details {
  border-bottom: 1px solid var(--hb-line);
  background: var(--hb-white);
}
.hb-jacket-lab .hb-faq summary {
  position: relative;
  padding: 21px 48px 21px 0;
  color: var(--hb-ink);
  font-weight: 800;
  line-height: 1.45;
  cursor: pointer;
  list-style: none;
}
.hb-jacket-lab .hb-faq summary::-webkit-details-marker { display: none; }
.hb-jacket-lab .hb-faq summary::after {
  content: "+";
  position: absolute;
  top: 15px;
  right: 2px;
  font-size: 27px;
  font-weight: 400;
}
.hb-jacket-lab .hb-faq details[open] summary::after { content: "−"; }
.hb-jacket-lab .hb-faq details p {
  max-width: 900px;
  padding: 0 48px 20px 0;
  color: var(--hb-muted);
}
.hb-jacket-lab .hb-final {
  margin: 70px 0 20px;
  padding: 36px;
  border: 2px solid var(--hb-ink);
  background: var(--hb-soft);
}
.hb-jacket-lab .hb-final h2 {
  margin: 0 0 16px;
  padding: 0;
  border: 0;
}
.hb-jacket-lab .hb-final-link {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  margin-top: 5px;
  padding: 10px 18px;
  border: 1px solid var(--hb-ink);
  background: var(--hb-ink);
  color: var(--hb-white);
  text-decoration: none;
}
.hb-jacket-lab .hb-final-link:hover {
  background: var(--hb-white);
  color: var(--hb-ink);
}
@media (max-width: 860px) {
  .hb-jacket-lab .hb-toc-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .hb-jacket-lab .hb-route-board,
  .hb-jacket-lab .hb-motion-strip { grid-template-columns: 1fr; }
  .hb-jacket-lab .hb-route,
  .hb-jacket-lab .hb-motion-step {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--hb-line);
  }
  .hb-jacket-lab .hb-route:last-child,
  .hb-jacket-lab .hb-motion-step:last-child { border-bottom: 0; }
  .hb-jacket-lab .hb-friction-head { display: none; }
  .hb-jacket-lab .hb-friction-row {
    grid-template-columns: 120px minmax(0, 1fr);
    padding: 10px 0;
  }
  .hb-jacket-lab .hb-friction-row em {
    grid-column: 2;
    padding-top: 0;
  }
  .hb-jacket-lab .hb-float-card { grid-template-columns: 1fr; }
  .hb-jacket-lab .hb-float-card.is-reverse .hb-float-media,
  .hb-jacket-lab .hb-float-card.is-reverse .hb-float-copy { order: initial; }
  .hb-jacket-lab .hb-float-media { min-height: 460px; }
  .hb-jacket-lab .hb-next-route { grid-template-columns: 1fr; }
  .hb-jacket-lab .hb-next-title { min-height: 120px; }
}
@media (max-width: 640px) {
  .hb-jacket-lab { font-size: 16px; line-height: 1.68; }
  .hb-jacket-lab h1 { font-size: 35px; }
  .hb-jacket-lab h2 { margin-top: 56px; font-size: 28px; }
  .hb-jacket-lab .hb-lede { font-size: 18px; }
  .hb-jacket-lab .hb-toc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hb-jacket-lab .hb-toc a { white-space: normal; }
  .hb-jacket-lab .hb-formulas { grid-template-columns: 1fr; }
  .hb-jacket-lab .hb-float-media { min-height: 380px; }
  .hb-jacket-lab .hb-float-copy { padding: 25px 21px; }
  .hb-jacket-lab .hb-next-links a { grid-template-columns: 1fr; gap: 4px; }
  .hb-jacket-lab .hb-final { padding: 25px 21px; }
}