:root {
  --hub-wine: #641d3b;
  --hub-wine-dark: #2a0a19;
  --hub-wine-mid: #4b102b;
  --hub-lime: #c9eb45;
  --hub-paper: #f8f5ef;
  --hub-paper-deep: #ebe5dc;
  --hub-ink: #1d1d21;
  --hub-ink-soft: #5f5d62;
  --hub-line: rgba(29, 29, 33, .14);
  --hub-serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
  --hub-sans: Inter, "Helvetica Neue", Arial, sans-serif;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 108px;
}

body {
  overflow-x: hidden;
  background: var(--hub-paper);
  color: var(--hub-ink);
}

body.menu-is-open { overflow: hidden; }

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 999;
  transform: translateY(-150%);
  border-radius: 8px;
  background: var(--hub-lime);
  color: var(--hub-ink);
  padding: 12px 16px;
  font: 750 12px/1 var(--hub-sans);
}

.skip-link:focus { transform: translateY(0); }

.knee-hub-site {
  min-width: 320px;
  overflow: clip;
  background: var(--hub-paper);
}

.hub2-shell,
.site-footer .section-shell {
  width: min(88vw, 1420px);
  margin-inline: auto;
}

.knee-hub-site h1,
.knee-hub-site h2,
.knee-hub-site h3,
.site-footer h3 { text-wrap: balance; }

.knee-hub-site p { text-wrap: pretty; }

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .65s cubic-bezier(.2, .8, .2, 1), transform .8s cubic-bezier(.2, .8, .2, 1);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.hub2-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 18px;
  color: var(--hub-lime);
  font: 780 10px/1.4 var(--hub-sans);
  letter-spacing: .2em;
  text-transform: uppercase;
}

.hub2-eyebrow::before {
  width: 34px;
  height: 1px;
  flex: 0 0 34px;
  background: currentColor;
  content: "";
}

.hub2-eyebrow-wine { color: var(--hub-wine); }

/* Preserve the established site header while making Knee visibly current. */
.knee-hub-site .site-header { z-index: 200; }

.knee-hub-site .brand-logo-mark,
.site-footer .brand-logo-mark {
  display: grid;
  width: 49px;
  height: 49px;
  flex: 0 0 49px;
  place-items: center;
  overflow: hidden;
  border-radius: 14px;
  background: var(--hub-wine);
}

.knee-hub-site .brand-logo-mark img,
.site-footer .brand-logo-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.knee-hub-site .current-nav-group .nav-link { color: var(--hub-wine); }
.knee-hub-site .current-nav-group .nav-link::after { transform: scaleX(1); }

.knee-hub-site .nav-link > span {
  color: var(--hub-wine);
  font-size: 13px;
  line-height: 1;
  transition: transform .2s ease;
}

.knee-hub-site .nav-group:hover .nav-link > span,
.knee-hub-site .nav-group:focus-within .nav-link > span { transform: rotate(180deg); }

.knee-hub-site .mega-links > a > b {
  position: relative;
  z-index: 2;
  color: var(--hub-wine);
  font-size: 16px;
  transition: transform .2s ease;
}

.knee-hub-site .mega-links > a:hover > b { transform: translate(3px, -3px); }

.knee-hub-site .header-cta > b {
  color: var(--hub-lime);
  font-size: 18px;
}

.knee-hub-site .language-switch {
  display: inline-grid;
  min-width: 48px;
  place-items: center;
  padding: 10px 7px;
  font-size: 10px;
  font-weight: 730;
}

.knee-hub-site .mobile-home-link {
  display: block;
  border-bottom: 1px solid rgba(255, 255, 255, .16);
  padding: 17px 0;
  color: var(--hub-lime);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.knee-hub-site .mobile-submenu { grid-template-columns: 1fr; }

.knee-hub-site .mobile-submenu a {
  min-height: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  padding: 14px 0;
  color: #fff;
  font-size: 12px;
}

/* Hero: page purpose and three routes share the first experience. */
.hub2-hero {
  position: relative;
  padding: 116px 0 138px;
  background:
    linear-gradient(90deg, rgba(100, 29, 59, .045) 1px, transparent 1px) 0 0 / 12.5% 100%,
    var(--hub-paper-deep);
}

.hub2-hero-stage {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(390px, .92fr);
  width: min(94vw, 1600px);
  min-height: 610px;
  margin-inline: auto;
  overflow: hidden;
  border: 1px solid rgba(100, 29, 59, .18);
  border-radius: 32px 32px 8px 8px;
  background: var(--hub-wine-dark);
  box-shadow: 0 32px 80px rgba(42, 10, 25, .16);
}

.hub2-hero-copy {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 610px;
  padding: 104px clamp(46px, 5vw, 88px) 72px;
  overflow: hidden;
  background:
    radial-gradient(circle at 15% 90%, rgba(201, 235, 69, .12), transparent 28%),
    linear-gradient(145deg, var(--hub-wine-dark), var(--hub-wine-mid));
  color: #fff;
}

.hub2-hero-copy::after {
  position: absolute;
  right: -150px;
  bottom: -280px;
  width: 560px;
  height: 560px;
  border: 1px solid rgba(201, 235, 69, .16);
  border-radius: 50%;
  box-shadow: inset 0 0 0 82px transparent, inset 0 0 0 83px rgba(201, 235, 69, .08), inset 0 0 0 172px transparent, inset 0 0 0 173px rgba(201, 235, 69, .07);
  content: "";
  pointer-events: none;
}

.hub2-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: auto;
  color: rgba(255, 255, 255, .55);
  font: 700 9px/1 var(--hub-sans);
  letter-spacing: .14em;
  text-transform: uppercase;
}

.hub2-breadcrumbs a:hover { color: var(--hub-lime); }

.hub2-hero-copy > .hub2-eyebrow { margin-top: 58px; }

.hub2-hero-copy h1 {
  max-width: 790px;
  margin: 0;
  font-family: var(--hub-serif);
  font-size: clamp(58px, 5.25vw, 88px);
  font-weight: 400;
  letter-spacing: -.06em;
  line-height: .89;
}

.hub2-hero-copy h1 em {
  display: block;
  margin-top: 10px;
  color: var(--hub-lime);
  font-weight: 400;
}

.hub2-lead {
  max-width: 690px;
  margin: 26px 0 0;
  color: rgba(255, 255, 255, .72);
  font: 400 clamp(14px, 1.1vw, 17px)/1.7 var(--hub-sans);
}

.hub2-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 22px;
  margin-top: 29px;
}

.hub2-button {
  --mag-x: 0px;
  --mag-y: 0px;
  display: inline-flex;
  min-height: 56px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-radius: 13px;
  padding: 0 22px;
  transform: translate(var(--mag-x), var(--mag-y));
  font: 760 12px/1 var(--hub-sans);
  transition: background-color .25s ease, color .25s ease, transform .15s ease;
}

.hub2-button-lime {
  background: var(--hub-lime);
  color: var(--hub-ink);
}

.hub2-button-lime:hover { background: #d7f55b; }

.hub2-text-link {
  position: relative;
  color: rgba(255, 255, 255, .78);
  font: 700 11px/1.2 var(--hub-sans);
}

.hub2-text-link::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 1px;
  background: rgba(255, 255, 255, .28);
  content: "";
}

.hub2-hero-photo {
  position: relative;
  min-height: 610px;
  margin: 0;
  overflow: hidden;
  background: #8b7d74;
}

.hub2-hero-photo::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(42, 10, 25, .2), transparent 32%), linear-gradient(180deg, transparent 62%, rgba(15, 10, 12, .58));
  content: "";
  pointer-events: none;
}

.hub2-hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 64% center;
  filter: saturate(.82) contrast(1.03);
  animation: heroFocus 1.2s cubic-bezier(.2, .8, .2, 1) both;
}

.hub2-hero-photo figcaption {
  position: absolute;
  right: 24px;
  bottom: 22px;
  left: 24px;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  color: rgba(255, 255, 255, .78);
  font: 700 8px/1.4 var(--hub-sans);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.hub2-hero-photo figcaption a { color: rgba(255, 255, 255, .58); }
.hub2-hero-photo figcaption a:hover { color: #fff; }

.hub2-hero-index {
  position: absolute;
  top: 50%;
  right: 14px;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateY(-50%) rotate(90deg);
  transform-origin: right center;
  color: #fff;
  font: 800 8px/1 var(--hub-sans);
  letter-spacing: .2em;
}

.hub2-hero-index b { color: var(--hub-lime); font-weight: 800; }

.hub2-route-dock {
  position: relative;
  z-index: 4;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: min(86vw, 1370px);
  margin: -62px auto 0;
  border: 1px solid rgba(42, 10, 25, .16);
  border-radius: 22px;
  outline: 1px solid rgba(100, 29, 59, .08);
  outline-offset: 8px;
  box-shadow: 0 26px 70px rgba(42, 10, 25, .2);
}

.hub2-route {
  position: relative;
  min-height: 286px;
  overflow: visible;
  padding: 29px 30px 28px;
  transition: transform .35s cubic-bezier(.2, .8, .2, 1), box-shadow .35s ease;
}

.hub2-route:first-child { border-radius: 22px 0 0 22px; }
.hub2-route:last-child { border-radius: 0 22px 22px 0; }
.hub2-route:not(:last-child) { border-right: 1px solid rgba(255, 255, 255, .14); }
.hub2-route-conditions { border-right-color: rgba(29, 29, 33, .16) !important; }

.hub2-route::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: currentColor;
  content: "";
  opacity: .42;
}

.hub2-route::after {
  position: absolute;
  right: 18px;
  bottom: 14px;
  width: 160px;
  height: 160px;
  border: 1px solid currentColor;
  border-radius: 50%;
  content: "";
  opacity: .13;
  transition: transform .5s ease;
}

.hub2-route-image {
  --photo-rotate: -2deg;
  position: absolute;
  top: -52px;
  right: 30px;
  z-index: 3;
  width: 170px;
  height: 128px;
  margin: 0;
  border: 6px solid #fffefa;
  border-radius: 4px 4px 18px 4px;
  background: #fffefa;
  box-shadow: 0 17px 34px rgba(26, 12, 19, .24);
  transform: rotate(var(--photo-rotate));
  transform-origin: 50% 20%;
  transition: transform .45s cubic-bezier(.2, .8, .2, 1), box-shadow .35s ease;
}

.hub2-route-image::before {
  position: absolute;
  top: -36px;
  left: 50%;
  width: 1px;
  height: 36px;
  background: currentColor;
  content: "";
  opacity: .42;
}

.hub2-route-image::after {
  position: absolute;
  top: -42px;
  left: calc(50% - 4px);
  width: 8px;
  height: 8px;
  border: 1px solid currentColor;
  border-radius: 50%;
  background: var(--hub-paper-deep);
  content: "";
}

.hub2-route-image img {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 1px 1px 12px 1px;
  object-fit: cover;
  filter: saturate(.8) contrast(1.04);
}

.hub2-route-sports .hub2-route-image {
  --photo-rotate: 1.5deg;
  border-color: var(--hub-ink);
  background: var(--hub-ink);
}

.hub2-route-replacement .hub2-route-image {
  --photo-rotate: -1deg;
  border-color: var(--hub-wine);
  background: var(--hub-wine);
}

.hub2-route-replacement .hub2-route-image img { filter: contrast(1.12); }

.hub2-route:hover,
.hub2-route:focus-visible {
  z-index: 2;
  transform: translateY(-12px);
  box-shadow: 0 24px 42px rgba(30, 16, 24, .19);
}

.hub2-route:hover .hub2-route-image,
.hub2-route:focus-visible .hub2-route-image {
  box-shadow: 0 25px 46px rgba(26, 12, 19, .3);
  transform: translateY(-8px) rotate(0);
}

.hub2-route:hover::after,
.hub2-route:focus-visible::after { transform: scale(1.18); }

.hub2-route-conditions { background: #fffefa; color: var(--hub-ink); }
.hub2-route-sports { background: var(--hub-ink); color: #fff; }
.hub2-route-replacement { background: var(--hub-wine); color: #fff; }

.hub2-route-number {
  position: relative;
  z-index: 2;
  display: block;
  color: var(--hub-wine);
  font: 800 9px/1 var(--hub-sans);
  letter-spacing: .15em;
}

.hub2-route-sports .hub2-route-number,
.hub2-route-replacement .hub2-route-number { color: var(--hub-lime); }

.hub2-route > p {
  position: relative;
  z-index: 2;
  margin: 54px 0 8px;
  color: var(--hub-wine);
  font: 800 8px/1.3 var(--hub-sans);
  letter-spacing: .18em;
}

.hub2-route-sports > p,
.hub2-route-replacement > p { color: var(--hub-lime); }

.hub2-route h2 {
  position: relative;
  z-index: 2;
  max-width: 285px;
  margin: 0;
  font-family: var(--hub-serif);
  font-size: clamp(31px, 2.45vw, 42px);
  font-weight: 400;
  letter-spacing: -.045em;
  line-height: .92;
}

.hub2-route > small {
  position: relative;
  z-index: 2;
  display: block;
  max-width: 255px;
  margin-top: 18px;
  color: var(--hub-ink-soft);
  font: 500 9px/1.55 var(--hub-sans);
}

.hub2-route-sports > small,
.hub2-route-replacement > small { color: rgba(255, 255, 255, .6); }

.hub2-route-arrow {
  position: absolute;
  right: 24px;
  bottom: 24px;
  z-index: 2;
  display: grid;
  width: 43px;
  height: 43px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  color: var(--hub-wine);
  font: 400 19px/1 var(--hub-sans);
  transition: transform .25s ease, background-color .25s ease;
}

.hub2-route-sports .hub2-route-arrow,
.hub2-route-replacement .hub2-route-arrow { color: var(--hub-lime); }

.hub2-route:hover .hub2-route-arrow { transform: rotate(45deg); }

@keyframes heroFocus {
  from { opacity: .45; transform: scale(1.06); }
  to { opacity: 1; transform: scale(1); }
}

/* Compact clinical overview. */
.hub2-intro {
  padding: clamp(78px, 8vw, 126px) 0;
  background: var(--hub-paper);
}

.hub2-intro-grid {
  position: relative;
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: clamp(56px, 8vw, 130px);
  align-items: start;
  border: 1px solid var(--hub-line);
  border-radius: 24px;
  background: rgba(255, 255, 255, .36);
  box-shadow: inset 6px 0 0 var(--hub-wine);
  padding: clamp(38px, 4.5vw, 66px);
}

.hub2-intro-heading h2,
.hub2-spectrum-head h2,
.hub2-faq-intro h2 {
  margin: 0;
  font-family: var(--hub-serif);
  font-size: clamp(49px, 4.8vw, 76px);
  font-weight: 400;
  letter-spacing: -.06em;
  line-height: .93;
}

.hub2-intro-copy { padding-top: 5px; }

.hub2-intro-copy > p {
  max-width: 760px;
  margin: 0 0 18px;
  color: var(--hub-ink-soft);
  font: 400 13px/1.78 var(--hub-sans);
}

.hub2-intro-copy .hub2-intro-lead {
  margin-bottom: 22px;
  color: var(--hub-ink);
  font-family: var(--hub-serif);
  font-size: clamp(22px, 1.9vw, 31px);
  line-height: 1.28;
}

.hub2-scope {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.hub2-scope li {
  border: 1px solid var(--hub-line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .5);
  padding: 10px 13px;
  color: var(--hub-wine);
  font: 750 9px/1 var(--hub-sans);
}

/* Interactive route finder. */
.hub2-finder {
  position: relative;
  isolation: isolate;
  padding: clamp(82px, 8vw, 128px) 0;
  overflow: hidden;
  background: var(--hub-ink);
  color: #fff;
}

.hub2-finder::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 100% 25%, 12.5% 100%;
  content: "";
  mask-image: linear-gradient(90deg, #000, transparent 78%);
}

.hub2-finder-grid {
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  gap: clamp(60px, 7vw, 115px);
  align-items: start;
}

.hub2-finder-heading {
  position: sticky;
  top: 135px;
}

.hub2-finder-heading h2 {
  max-width: 500px;
  margin: 0;
  font-family: var(--hub-serif);
  font-size: clamp(55px, 5.4vw, 83px);
  font-weight: 400;
  letter-spacing: -.06em;
  line-height: .9;
}

.hub2-finder-heading > p:not(.hub2-eyebrow) {
  max-width: 440px;
  margin: 26px 0 0;
  color: rgba(255, 255, 255, .58);
  font: 400 13px/1.7 var(--hub-sans);
}

.hub2-finder-note {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 13px;
  max-width: 480px;
  margin-top: 38px;
  border-top: 1px solid rgba(255, 255, 255, .14);
  padding-top: 22px;
}

.hub2-finder-note > span {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 1px solid var(--hub-lime);
  border-radius: 50%;
  color: var(--hub-lime);
  font: 700 10px/1 var(--hub-serif);
}

.hub2-finder-note p {
  margin: 0;
  color: rgba(255, 255, 255, .48);
  font: 400 9px/1.65 var(--hub-sans);
}

.hub2-finder-tool {
  border: 1px solid rgba(255, 255, 255, .13);
  border-radius: 23px;
  outline: 1px solid rgba(201, 235, 69, .22);
  outline-offset: 7px;
  overflow: hidden;
  background: rgba(255, 255, 255, .035);
  box-shadow: 0 30px 72px rgba(0, 0, 0, .2);
}

.hub2-symptom-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.hub2-symptom-buttons button {
  display: grid;
  grid-template-columns: 35px minmax(0, 1fr);
  min-height: 72px;
  align-items: center;
  gap: 12px;
  border: 0;
  border-right: 1px solid rgba(255, 255, 255, .1);
  border-bottom: 1px solid rgba(255, 255, 255, .1);
  background: transparent;
  padding: 13px 17px;
  color: rgba(255, 255, 255, .68);
  font: 700 10px/1.35 var(--hub-sans);
  text-align: left;
  transition: background-color .2s ease, color .2s ease;
  cursor: pointer;
}

.hub2-symptom-buttons button:nth-child(even) { border-right: 0; }

.hub2-symptom-buttons button span {
  display: grid;
  width: 35px;
  height: 35px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 50%;
  color: var(--hub-lime);
  font: 780 8px/1 var(--hub-sans);
}

.hub2-symptom-buttons button:hover,
.hub2-symptom-buttons button.is-active {
  background: rgba(201, 235, 69, .09);
  color: #fff;
}

.hub2-symptom-buttons button.is-active span {
  border-color: var(--hub-lime);
  background: var(--hub-lime);
  color: var(--hub-ink);
}

.hub2-result {
  position: relative;
  min-height: 320px;
  padding: 40px 42px 36px;
  overflow: hidden;
  background: var(--hub-paper);
  color: var(--hub-ink);
  transition: background-color .25s ease;
}

.hub2-result::after {
  position: absolute;
  right: -45px;
  bottom: -65px;
  width: 210px;
  height: 210px;
  border: 1px solid currentColor;
  border-radius: 50%;
  content: "";
  opacity: .12;
}

.hub2-result-sports { background: #ebf0df; }
.hub2-result-replacement { background: #f0e2e8; }

.hub2-result-kicker {
  color: var(--hub-wine);
  font: 800 8px/1 var(--hub-sans);
  letter-spacing: .2em;
}

.hub2-result h3 {
  max-width: 600px;
  margin: 35px 0 16px;
  font-family: var(--hub-serif);
  font-size: clamp(33px, 3.2vw, 50px);
  font-weight: 400;
  letter-spacing: -.05em;
  line-height: .96;
}

.hub2-result > p {
  max-width: 650px;
  margin: 0;
  color: var(--hub-ink-soft);
  font: 400 11.5px/1.75 var(--hub-sans);
}

.hub2-result > a {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 34px;
  margin-top: 27px;
  color: var(--hub-wine);
  font: 760 10px/1 var(--hub-sans);
}

.hub2-result > a b { color: var(--hub-wine); font-size: 17px; }

.hub2-result > small {
  display: block;
  margin-top: 27px;
  color: rgba(29, 29, 33, .45);
  font: 500 8.5px/1.3 var(--hub-sans);
}

/* Clinical decision pathway and expertise: compact, not a showcase. */
.hub2-spectrum {
  padding: clamp(82px, 8vw, 128px) 0;
  background: #fffdfa;
}

.hub2-spectrum-head {
  display: grid;
  grid-template-columns: 1fr .72fr;
  gap: clamp(50px, 8vw, 120px);
  align-items: end;
}

.hub2-spectrum-head > p {
  margin: 0 0 5px;
  color: var(--hub-ink-soft);
  font: 400 13px/1.75 var(--hub-sans);
}

.hub2-spectrum-track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 68px;
  border-top: 1px solid var(--hub-line);
  border-bottom: 1px solid var(--hub-line);
}

.hub2-spectrum-track::before {
  position: absolute;
  top: -2px;
  left: 0;
  width: 25%;
  height: 3px;
  background: var(--hub-wine);
  content: "";
}

.hub2-spectrum-track article {
  min-height: 205px;
  border-right: 1px solid var(--hub-line);
  padding: 27px 28px 20px 0;
}

.hub2-spectrum-track article:not(:first-child) { padding-left: 28px; }
.hub2-spectrum-track article:last-child { border-right: 0; }

.hub2-spectrum-track span {
  color: var(--hub-wine);
  font: 800 8px/1 var(--hub-sans);
  letter-spacing: .15em;
}

.hub2-spectrum-track h3 {
  margin: 57px 0 10px;
  font-family: var(--hub-serif);
  font-size: 29px;
  font-weight: 400;
  letter-spacing: -.04em;
}

.hub2-spectrum-track p {
  max-width: 245px;
  margin: 0;
  color: var(--hub-ink-soft);
  font: 400 10px/1.6 var(--hub-sans);
}

.hub2-expertise-band {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 25px;
  border-radius: 17px;
  background: var(--hub-wine-dark);
  padding: 18px;
}

.hub2-expertise-band span {
  border: 1px solid rgba(255, 255, 255, .15);
  border-radius: 999px;
  padding: 11px 14px;
  color: rgba(255, 255, 255, .72);
  font: 700 9px/1 var(--hub-sans);
}

.hub2-expertise-band span:nth-child(1),
.hub2-expertise-band span:nth-child(5) {
  border-color: rgba(201, 235, 69, .45);
  color: var(--hub-lime);
}

/* FAQs */
.hub2-faq {
  padding: clamp(82px, 8vw, 128px) 0;
  background: var(--hub-paper-deep);
}

.hub2-faq-grid {
  display: grid;
  grid-template-columns: .68fr 1.32fr;
  gap: clamp(62px, 9vw, 145px);
  align-items: start;
}

.hub2-faq-intro {
  position: sticky;
  top: 135px;
}

.hub2-faq-intro > p:not(.hub2-eyebrow) {
  max-width: 420px;
  margin: 25px 0 0;
  color: var(--hub-ink-soft);
  font: 400 11px/1.7 var(--hub-sans);
}

.hub2-faq-intro > a {
  display: inline-flex;
  gap: 30px;
  margin-top: 28px;
  color: var(--hub-wine);
  font: 760 10px/1 var(--hub-sans);
}

.hub2-faq-list { border-top: 1px solid var(--hub-line); }

.hub2-faq-list details { border-bottom: 1px solid var(--hub-line); }

.hub2-faq-list summary {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) auto;
  min-height: 78px;
  align-items: center;
  gap: 14px;
  list-style: none;
  cursor: pointer;
}

.hub2-faq-list summary::-webkit-details-marker { display: none; }

.hub2-faq-list summary span {
  color: var(--hub-wine);
  font: 800 8px/1 var(--hub-sans);
}

.hub2-faq-list summary strong {
  font: 720 12px/1.4 var(--hub-sans);
}

.hub2-faq-list summary i {
  display: grid;
  width: 31px;
  height: 31px;
  place-items: center;
  border: 1px solid var(--hub-line);
  border-radius: 50%;
  color: var(--hub-wine);
  font: 400 17px/1 var(--hub-sans);
  transition: transform .2s ease, background-color .2s ease;
}

.hub2-faq-list details[open] summary i {
  transform: rotate(45deg);
  background: var(--hub-lime);
}

.hub2-faq-list details p {
  max-width: 720px;
  margin: -3px 45px 26px 50px;
  color: var(--hub-ink-soft);
  font: 400 11px/1.75 var(--hub-sans);
}

.hub2-faq-list details p a {
  border-bottom: 1px solid rgba(100, 29, 59, .35);
  color: var(--hub-wine);
  font-weight: 720;
}

.hub2-faq-list details p a:hover { border-bottom-color: var(--hub-wine); }

/* Compact finish. */
.hub2-final {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--hub-wine-dark);
  color: #fff;
}

.hub2-final::after {
  position: absolute;
  right: -120px;
  bottom: -320px;
  z-index: -1;
  width: 630px;
  height: 630px;
  border: 1px solid rgba(201, 235, 69, .16);
  border-radius: 50%;
  box-shadow: inset 0 0 0 96px transparent, inset 0 0 0 97px rgba(201, 235, 69, .09);
  content: "";
}

.hub2-final-grid {
  display: grid;
  grid-template-columns: 1fr 350px;
  min-height: 355px;
  align-items: center;
  gap: 80px;
  padding-block: 65px;
}

.hub2-final h2 {
  max-width: 880px;
  margin: 0;
  font-family: var(--hub-serif);
  font-size: clamp(46px, 4.8vw, 75px);
  font-weight: 400;
  letter-spacing: -.055em;
  line-height: .93;
}

.hub2-final-grid > div > p:last-child {
  margin: 21px 0 0;
  color: rgba(255, 255, 255, .58);
  font: 400 11px/1.65 var(--hub-sans);
}

.hub2-final-actions {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.hub2-call {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border: 1px solid rgba(255, 255, 255, .15);
  border-radius: 13px;
  padding: 0 18px;
}

.hub2-call small {
  color: rgba(255, 255, 255, .5);
  font: 600 8.5px/1.2 var(--hub-sans);
}

.hub2-call strong {
  color: var(--hub-lime);
  font: 400 23px/1 var(--hub-serif);
}

@media (max-width: 1320px) {
  .knee-hub-site .site-header { grid-template-columns: minmax(200px, .8fr) auto minmax(190px, .65fr); }
  .knee-hub-site .desktop-nav { gap: 10px; }
  .knee-hub-site .nav-link { font-size: 9.5px; }
  .knee-hub-site .header-cta { padding-inline: 15px; }
  .hub2-hero-stage { grid-template-columns: minmax(0, 1.16fr) minmax(350px, .84fr); }
  .hub2-route { padding-inline: 24px; }
  .hub2-route-image { top: -46px; right: 24px; width: 142px; height: 106px; }
}

@media (max-width: 1080px) {
  .knee-hub-site .desktop-nav { display: none; }
  .knee-hub-site .site-header { grid-template-columns: minmax(0, 1fr) auto; }
  .knee-hub-site .menu-toggle { display: grid; }

  .hub2-hero { padding-top: 105px; }
  .hub2-hero-stage { grid-template-columns: 1fr .72fr; min-height: 620px; }
  .hub2-hero-copy { min-height: 620px; padding-inline: 48px; }
  .hub2-hero-photo { min-height: 620px; }
  .hub2-hero-copy h1 { font-size: clamp(54px, 7.2vw, 73px); }
  .hub2-route-dock { width: 90vw; }
  .hub2-route { min-height: 270px; }
  .hub2-route > small { max-width: 210px; }

  .hub2-intro-grid,
  .hub2-finder-grid,
  .hub2-faq-grid { grid-template-columns: 1fr; gap: 46px; }
  .hub2-finder-heading,
  .hub2-faq-intro { position: static; }
  .hub2-spectrum-head { grid-template-columns: 1fr; gap: 30px; }
  .hub2-final-grid { grid-template-columns: 1fr 310px; gap: 45px; }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 78px; }
  .hub2-shell,
  .site-footer .section-shell { width: calc(100% - 28px); }

  .knee-hub-site .site-header,
  .knee-hub-site .site-header.is-scrolled {
    top: 8px;
    width: calc(100% - 16px);
    min-height: 62px;
    border-radius: 16px;
    padding: 6px 7px 6px 9px;
  }

  .knee-hub-site .brand-logo-mark { width: 42px; height: 42px; flex-basis: 42px; border-radius: 11px; }
  .knee-hub-site .brand-copy strong { max-width: 205px; font-size: 9px; letter-spacing: .08em; }
  .knee-hub-site .brand-copy small { max-width: 205px; overflow: hidden; font-size: 6px; text-overflow: ellipsis; }
  .knee-hub-site .header-cta,
  .knee-hub-site .language-switch { display: none; }
  .knee-hub-site .menu-toggle { width: 44px; height: 44px; flex: 0 0 44px; border-radius: 12px; color: #fff; }
  .knee-hub-site .mobile-menu { padding: 84px 16px 18px; }

  .hub2-hero { padding: 84px 0 72px; background: var(--hub-wine-dark); }
  .hub2-hero-stage { display: flex; width: 100%; min-height: 720px; flex-direction: column; border-radius: 0; }
  .hub2-hero-copy { order: 2; min-height: 445px; padding: 38px 18px 44px; }
  .hub2-breadcrumbs { position: absolute; top: -230px; left: 18px; margin: 0; }
  .hub2-hero-copy > .hub2-eyebrow { margin-top: 0; }
  .hub2-hero-copy h1 { font-size: clamp(47px, 13.6vw, 61px); }
  .hub2-lead { margin-top: 19px; font-size: 12px; line-height: 1.62; }
  .hub2-actions { display: grid; grid-template-columns: 1fr; gap: 18px; margin-top: 22px; }
  .hub2-button { width: 100%; min-height: 52px; }
  .hub2-text-link { width: max-content; }
  .hub2-hero-photo { order: 1; min-height: 275px; }
  .hub2-hero-photo img { object-position: 58% center; }
  .hub2-hero-photo figcaption { right: 14px; bottom: 12px; left: 14px; }
  .hub2-hero-photo figcaption span { display: none; }
  .hub2-hero-index { display: none; }

  .hub2-route-dock { grid-template-columns: 1fr; width: calc(100% - 28px); margin: -20px auto 0; border-radius: 18px; }
  .hub2-route { min-height: 246px; overflow: hidden; padding: 22px; }
  .hub2-route:first-child { border-radius: 18px 18px 0 0; }
  .hub2-route:last-child { border-radius: 0 0 18px 18px; }
  .hub2-route-image { top: 15px; right: 18px; width: 104px; height: 78px; border-width: 4px; transform: rotate(var(--photo-rotate)); }
  .hub2-route-image::before { top: -16px; height: 16px; }
  .hub2-route-image::after { top: -20px; width: 7px; height: 7px; }
  .hub2-route > p { max-width: calc(100% - 95px); margin-top: 70px; }
  .hub2-route h2 { max-width: calc(100% - 70px); font-size: 35px; }
  .hub2-route > small { max-width: 75%; margin-top: 12px; }
  .hub2-route:hover,
  .hub2-route:focus-visible { transform: translateX(5px); }

  .hub2-intro,
  .hub2-finder,
  .hub2-spectrum,
  .hub2-faq { padding: 64px 0; }

  .hub2-intro-grid,
  .hub2-finder-grid,
  .hub2-faq-grid { gap: 35px; }
  .hub2-intro-grid { border-radius: 18px; box-shadow: inset 4px 0 0 var(--hub-wine); padding: 30px 24px; }
  .hub2-intro-heading h2,
  .hub2-spectrum-head h2,
  .hub2-faq-intro h2,
  .hub2-finder-heading h2 { font-size: clamp(42px, 11.7vw, 53px); }
  .hub2-intro-copy .hub2-intro-lead { font-size: 21px; }
  .hub2-intro-copy > p { font-size: 12px; }
  .hub2-scope li { padding: 9px 11px; }

  .hub2-finder-note { margin-top: 28px; }
  .hub2-symptom-buttons { grid-template-columns: 1fr; }
  .hub2-symptom-buttons button { min-height: 63px; border-right: 0; }
  .hub2-finder-tool { border-radius: 17px; }
  .hub2-result { min-height: 345px; padding: 29px 21px 25px; }
  .hub2-result h3 { margin-top: 27px; font-size: 36px; }

  .hub2-spectrum-head { gap: 22px; }
  .hub2-spectrum-track { grid-template-columns: 1fr 1fr; margin-top: 42px; }
  .hub2-spectrum-track::before { width: 50%; }
  .hub2-spectrum-track article { min-height: 175px; border-bottom: 1px solid var(--hub-line); padding: 23px 20px 18px 0; }
  .hub2-spectrum-track article:nth-child(even) { border-right: 0; padding-left: 20px; }
  .hub2-spectrum-track article:nth-child(n+3) { border-bottom: 0; }
  .hub2-spectrum-track h3 { margin-top: 38px; font-size: 25px; }
  .hub2-expertise-band { padding: 13px; }

  .hub2-faq-list summary { grid-template-columns: 27px minmax(0, 1fr) auto; min-height: 69px; gap: 9px; }
  .hub2-faq-list summary strong { font-size: 10.5px; }
  .hub2-faq-list details p { margin: 0 38px 23px 36px; font-size: 10.5px; }

  .hub2-final-grid { grid-template-columns: 1fr; min-height: 0; gap: 34px; padding-block: 58px; }
  .hub2-final h2 { font-size: clamp(42px, 11.5vw, 53px); }
  .hub2-final-actions { max-width: none; }
}

@media (max-width: 430px) {
  .knee-hub-site .brand-copy strong,
  .knee-hub-site .brand-copy small { max-width: 185px; }
  .hub2-hero-copy h1 { font-size: clamp(44px, 12.8vw, 54px); }
  .hub2-spectrum-track { grid-template-columns: 1fr; }
  .hub2-spectrum-track::before { width: 100%; }
  .hub2-spectrum-track article,
  .hub2-spectrum-track article:nth-child(even),
  .hub2-spectrum-track article:nth-child(n+3) { min-height: 150px; border-right: 0; border-bottom: 1px solid var(--hub-line); padding: 22px 0; }
  .hub2-spectrum-track article:last-child { border-bottom: 0; }
  .hub2-spectrum-track h3 { margin-top: 27px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}

@media print {
  .site-header,
  .mobile-menu,
  .whatsapp-float { display: none !important; }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .hub2-hero { padding-top: 20px; }
}


/* --------------------------------------------------------------------------
   Knee Hub refinement — direct procedure visibility
   -------------------------------------------------------------------------- */
.hub2-procedures {
  padding: 72px 0;
  background: var(--hub-paper-deep);
}

.hub2-procedures-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, .52fr);
  align-items: end;
  gap: clamp(44px, 6vw, 90px);
  margin-bottom: 34px;
}

.hub2-procedures-head h2 {
  max-width: 890px;
  margin: 0;
  font-family: var(--hub-serif);
  font-size: clamp(42px, 4.25vw, 62px);
  font-weight: 400;
  letter-spacing: -.05em;
  line-height: .98;
}

.hub2-procedures-head > p {
  margin: 0;
  color: var(--hub-muted);
  font-size: 14px;
  line-height: 1.7;
}

.hub2-procedure-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 2px solid var(--hub-wine);
  border-bottom: 1px solid var(--hub-line);
}

.hub2-procedure-grid a {
  position: relative;
  min-height: 150px;
  padding: 22px 48px 21px 21px;
  border-right: 1px solid var(--hub-line);
  border-bottom: 1px solid var(--hub-line);
  transition: background .22s ease, color .22s ease, transform .22s ease;
}

.hub2-procedure-grid a:nth-child(3n) { border-right: 0; }
.hub2-procedure-grid a:nth-child(n+4) { border-bottom: 0; }
.hub2-procedure-grid a span {
  color: var(--hub-wine);
  font: 800 8px/1 var(--hub-sans);
}
.hub2-procedure-grid a strong {
  display: block;
  margin-top: 26px;
  font-family: var(--hub-serif);
  font-size: 25px;
  font-weight: 400;
  letter-spacing: -.035em;
  line-height: 1.05;
}
.hub2-procedure-grid a small {
  display: block;
  max-width: 300px;
  margin-top: 8px;
  color: var(--hub-muted);
  font-size: 10px;
  line-height: 1.5;
}
.hub2-procedure-grid a b {
  position: absolute;
  right: 20px;
  bottom: 20px;
  color: var(--hub-wine);
  font-size: 18px;
  font-weight: 400;
}
.hub2-procedure-grid a:hover {
  z-index: 2;
  background: var(--hub-wine-dark);
  color: #fff;
  transform: translateY(-4px);
}
.hub2-procedure-grid a:hover span,
.hub2-procedure-grid a:hover small,
.hub2-procedure-grid a:hover b { color: var(--hub-lime); }

@media (max-width: 1050px) {
  .hub2-procedures-head { grid-template-columns: 1fr; gap: 20px; }
  .hub2-procedure-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hub2-procedure-grid a,
  .hub2-procedure-grid a:nth-child(3n) { border-right: 1px solid var(--hub-line); border-bottom: 1px solid var(--hub-line); }
  .hub2-procedure-grid a:nth-child(2n) { border-right: 0; }
  .hub2-procedure-grid a:nth-child(n+5) { border-bottom: 0; }
}

@media (max-width: 760px) {
  .hub2-procedures { padding: 58px 0; }
  .hub2-procedures-head h2 { font-size: clamp(40px, 11vw, 52px); }
  .hub2-procedures-head > p { font-size: 12px; }
  .hub2-procedure-grid { grid-template-columns: 1fr; }
  .hub2-procedure-grid a,
  .hub2-procedure-grid a:nth-child(2n),
  .hub2-procedure-grid a:nth-child(3n),
  .hub2-procedure-grid a:nth-child(n+5) { min-height: 128px; border-right: 0; border-bottom: 1px solid var(--hub-line); }
  .hub2-procedure-grid a:last-child { border-bottom: 0; }
}


/* ==========================================================================
   KNEE HUB COMPACT PROPORTION PASS — 2026-08-15
   Preserve the approved Knee Hub design; correct only oversized desktop/tablet
   typography and vertical rhythm that made headings appear unnaturally tall.
   ========================================================================== */
@media (min-width: 1081px) {
  .hub2-hero-stage { min-height: 560px; }
  .hub2-hero-copy { min-height: 560px; padding-top: 38px; padding-bottom: 44px; }
  .hub2-hero-photo { min-height: 560px; }
  .hub2-hero-copy > .hub2-eyebrow { margin-top: 42px; }
  .hub2-hero-copy h1 {
    max-width: 760px;
    font-size: clamp(50px, 4.55vw, 72px);
    line-height: .93;
  }
  .hub2-lead { margin-top: 21px; }
  .hub2-route { min-height: 252px; padding-top: 26px; padding-bottom: 24px; }
  .hub2-route-image { top: -45px; width: 154px; height: 116px; }
  .hub2-route > p { margin-top: 47px; }
  .hub2-route h2 { font-size: clamp(29px, 2.15vw, 38px); line-height: .96; }
  .hub2-route > small { margin-top: 14px; }

  .hub2-intro,
  .hub2-finder,
  .hub2-spectrum,
  .hub2-faq { padding: 72px 0; }

  .hub2-intro-grid { gap: clamp(48px, 5.5vw, 84px); padding: clamp(36px, 3.6vw, 52px); }
  .hub2-intro-heading h2,
  .hub2-spectrum-head h2,
  .hub2-faq-intro h2 {
    font-size: clamp(42px, 3.65vw, 58px);
    line-height: .97;
    letter-spacing: -.052em;
  }

  .hub2-finder-grid {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    gap: clamp(50px, 5vw, 76px);
  }
  .hub2-finder-heading h2 {
    max-width: 560px;
    font-size: clamp(44px, 3.9vw, 62px);
    line-height: .95;
    letter-spacing: -.052em;
  }
  .hub2-finder-heading > p:not(.hub2-eyebrow) { margin-top: 20px; }
  .hub2-finder-note { margin-top: 28px; }

  .hub2-spectrum-head { gap: clamp(42px, 5vw, 76px); }
  .hub2-spectrum-track { margin-top: 46px; }
  .hub2-spectrum-track article { min-height: 176px; padding-top: 23px; padding-bottom: 18px; }
  .hub2-spectrum-track h3 { margin-top: 39px; font-size: 27px; }

  .hub2-procedures { padding: 62px 0; }
  .hub2-procedures-head { margin-bottom: 28px; }
  .hub2-procedures-head h2 { font-size: clamp(38px, 3.45vw, 54px); line-height: 1; }
  .hub2-procedure-grid a { min-height: 138px; }
  .hub2-procedure-grid a strong { margin-top: 22px; font-size: 23px; }

  .hub2-faq-grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    gap: clamp(58px, 6vw, 92px);
  }
  .hub2-faq-list summary { min-height: 72px; }

  .hub2-final-grid { min-height: 300px; gap: 64px; padding-block: 50px; }
  .hub2-final h2 { font-size: clamp(40px, 3.7vw, 58px); line-height: .97; }
}

@media (min-width: 761px) and (max-width: 1080px) {
  .hub2-hero-stage,
  .hub2-hero-copy,
  .hub2-hero-photo { min-height: 545px; }
  .hub2-hero-copy h1 { font-size: clamp(46px, 6vw, 64px); line-height: .94; }
  .hub2-intro,
  .hub2-finder,
  .hub2-spectrum,
  .hub2-faq { padding: 68px 0; }
  .hub2-intro-heading h2,
  .hub2-spectrum-head h2,
  .hub2-faq-intro h2,
  .hub2-finder-heading h2 { font-size: clamp(40px, 5.25vw, 55px); line-height: .98; }
  .hub2-procedures-head h2 { font-size: clamp(38px, 5vw, 52px); }
  .hub2-final h2 { font-size: clamp(40px, 5.2vw, 54px); }
}