:root {
  --ink: #0b0d0f;
  --ink-soft: #15191d;
  --white: #ffffff;
  --paper: #f7f7f4;
  --surface: #f1f2f2;
  --line: #dfe3e6;
  --muted: #616970;
  --orange: #f36b21;
  --orange-deep: #b9430b;
  --orange-soft: #ffb37b;
  --orange-pale: #fff1e8;
  --orange-line: #f7c4a5;
  --blue: #1677c8;
  --blue-deep: #0b3155;
  --blue-soft: #79c6f2;
  --blue-pale: #edf7ff;
  --blue-line: #b9ddf5;
  --green: #2f7d4a;
  --shadow-sm: 0 8px 28px rgba(11, 13, 15, 0.07);
  --shadow-md: 0 24px 70px rgba(11, 13, 15, 0.11);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 30px;
  --container: 1220px;
  --header-height: 76px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button,
input,
textarea,
select {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
}

p,
h1,
h2,
h3,
h4,
ul,
ol,
blockquote {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  font-family: Manrope, Inter, ui-sans-serif, system-ui, sans-serif;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

h1 {
  font-size: clamp(2.65rem, 6vw, 4.5rem);
}

h2 {
  font-size: clamp(2rem, 4.6vw, 3.35rem);
}

h3 {
  font-size: clamp(1.25rem, 2.3vw, 1.72rem);
}

p:last-child {
  margin-bottom: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 9999;
  transform: translateY(-160%);
  border-radius: 10px;
  background: var(--ink);
  color: var(--white);
  padding: 12px 18px;
  font-weight: 800;
}

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

:focus-visible {
  outline: 3px solid rgba(22, 119, 200, 0.48);
  outline-offset: 4px;
}

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
}

.narrow {
  width: min(calc(100% - 40px), 820px);
  margin-inline: auto;
}

.section {
  position: relative;
  padding-block: clamp(68px, 8vw, 112px);
}

.section-sm {
  padding-block: clamp(46px, 6vw, 76px);
}

.surface {
  background: var(--paper);
}

.surface-dark {
  background: var(--ink);
  color: var(--white);
}

.surface-orange {
  background: var(--orange-pale);
}

.surface-blue {
  background: var(--blue-pale);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 0.77rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  line-height: 1;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 26px;
  height: 3px;
  border-radius: 999px;
  background: currentColor;
  content: "";
}

.eyebrow.orange {
  color: var(--orange-deep);
}

.eyebrow.blue {
  color: var(--blue-deep);
}

.eyebrow.light {
  color: rgba(255, 255, 255, 0.72);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 44px;
}

.section-heading.centered {
  margin-inline: auto;
  text-align: center;
}

.section-heading.centered .eyebrow {
  justify-content: center;
}

.section-heading h2 {
  margin-bottom: 18px;
}

.section-heading p {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.06rem;
}

.section-heading.centered p {
  margin-inline: auto;
}

.surface-dark .section-heading p {
  color: rgba(255, 255, 255, 0.68);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid transparent;
  border-radius: 14px;
  padding: 13px 20px;
  cursor: pointer;
  font-size: 0.94rem;
  font-weight: 850;
  line-height: 1.2;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-dark {
  background: var(--ink);
  color: var(--white);
  box-shadow: 0 10px 22px rgba(11, 13, 15, 0.16);
}

.button-dark:hover {
  background: #22272c;
}

.button-orange {
  background: var(--orange);
  color: var(--ink);
  box-shadow: 0 12px 24px rgba(243, 107, 33, 0.22);
}

.button-orange:hover {
  background: #ff7a32;
}

.button-blue {
  background: var(--blue);
  color: var(--white);
  box-shadow: 0 12px 24px rgba(22, 119, 200, 0.22);
}

.button-blue:hover {
  background: #2488d7;
}

.button-light {
  border-color: var(--line);
  background: var(--white);
  color: var(--ink);
}

.button-light:hover {
  border-color: #bdc4c9;
  box-shadow: var(--shadow-sm);
}

.button-white {
  background: var(--white);
  color: var(--ink);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid currentColor;
  font-size: 0.94rem;
  font-weight: 850;
  line-height: 1.5;
}

.text-link::after {
  content: "→";
  transition: transform 180ms ease;
}

.text-link:hover::after {
  transform: translateX(4px);
}

.utility-bar {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.74rem;
  font-weight: 750;
  letter-spacing: 0.025em;
}

.utility-inner {
  display: flex;
  min-height: 36px;
  align-items: center;
  justify-content: center;
  gap: 28px;
}

.utility-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.utility-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--orange);
}

.utility-item:nth-child(2) .utility-dot {
  background: var(--blue-soft);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  border-bottom: 1px solid rgba(223, 227, 230, 0.86);
  background: rgba(255, 255, 255, 0.93);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: flex;
  min-height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  font-family: Manrope, Inter, sans-serif;
  font-size: 1.08rem;
  font-weight: 900;
  letter-spacing: -0.035em;
}

.wordmark-artro {
  color: var(--orange-deep);
}

.wordmark-arti {
  color: var(--blue-deep);
}

.wordmark-divider {
  width: 1px;
  height: 20px;
  margin-inline: 4px;
  background: var(--line);
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 7px;
}

.nav-link {
  border-radius: 10px;
  padding: 10px 11px;
  color: #3e454b;
  font-size: 0.85rem;
  font-weight: 760;
}

.nav-link:hover,
.nav-link.active {
  background: var(--surface);
  color: var(--ink);
}

.header-action {
  margin-left: 5px;
}

.menu-button {
  display: none;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--white);
  cursor: pointer;
}

.menu-icon,
.menu-icon::before,
.menu-icon::after {
  width: 21px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 180ms ease, opacity 180ms ease;
}

.menu-icon {
  position: relative;
}

.menu-icon::before,
.menu-icon::after {
  position: absolute;
  left: 0;
  content: "";
}

.menu-icon::before {
  top: -7px;
}

.menu-icon::after {
  top: 7px;
}

.menu-button[aria-expanded="true"] .menu-icon {
  background: transparent;
}

.menu-button[aria-expanded="true"] .menu-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-button[aria-expanded="true"] .menu-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

.mobile-nav {
  display: none;
  border-top: 1px solid var(--line);
  background: var(--white);
}

.mobile-nav.open {
  display: block;
}

.mobile-nav-inner {
  display: grid;
  gap: 4px;
  padding-block: 18px 26px;
}

.mobile-nav .nav-link {
  display: block;
  padding: 13px 10px;
  font-size: 1rem;
}

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 84% 12%, rgba(22, 119, 200, 0.09), transparent 23%),
    radial-gradient(circle at 14% 78%, rgba(243, 107, 33, 0.09), transparent 25%),
    var(--white);
}

.hero::before {
  position: absolute;
  top: 0;
  right: -12vw;
  width: 40vw;
  height: 40vw;
  border: 1px solid rgba(22, 119, 200, 0.12);
  border-radius: 50%;
  content: "";
}

.hero-grid {
  display: grid;
  min-height: 700px;
  grid-template-columns: minmax(0, 0.92fr) minmax(520px, 1.08fr);
  align-items: center;
  gap: 70px;
  padding-block: 72px 84px;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.hero-copy h1 {
  max-width: 720px;
  margin-bottom: 24px;
}

.hero-copy .lead {
  max-width: 640px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
}

.hero-microcopy {
  display: flex;
  flex-wrap: wrap;
  gap: 15px 22px;
  margin-top: 28px;
  color: #495157;
  font-size: 0.82rem;
  font-weight: 700;
}

.micro-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.micro-check {
  display: inline-grid;
  width: 20px;
  height: 20px;
  place-items: center;
  border-radius: 50%;
  background: var(--surface);
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 900;
}

.hero-visual {
  position: relative;
  min-height: 560px;
}

.hero-product {
  position: absolute;
  width: min(55%, 340px);
  border-radius: 28px;
  box-shadow: var(--shadow-md);
}

.hero-product.artro {
  top: 16px;
  left: 5px;
  transform: rotate(-2deg);
}

.hero-product.arti {
  right: 0;
  bottom: 2px;
  transform: rotate(2deg);
}

.hero-orbit {
  position: absolute;
  inset: 58px 30px 52px;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.media-slot {
  position: relative;
  display: grid;
  overflow: hidden;
  min-height: 240px;
  place-items: center;
  border: 1.5px dashed #bcc3c8;
  border-radius: var(--radius-md);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.75), rgba(255, 255, 255, 0.18)),
    repeating-linear-gradient(45deg, transparent, transparent 12px, rgba(11, 13, 15, 0.025) 12px, rgba(11, 13, 15, 0.025) 24px),
    var(--surface);
  color: #4f575d;
  isolation: isolate;
}

.media-slot.orange {
  border-color: var(--orange-line);
  background-color: var(--orange-pale);
}

.media-slot.blue {
  border-color: var(--blue-line);
  background-color: var(--blue-pale);
}

.media-slot.square {
  aspect-ratio: 1;
}

.media-slot.ratio-4-5 {
  aspect-ratio: 4 / 5;
}

.media-slot.ratio-4-3 {
  aspect-ratio: 4 / 3;
}

.media-slot.ratio-16-9 {
  aspect-ratio: 16 / 9;
}

.media-slot-content {
  display: grid;
  max-width: 78%;
  place-items: center;
  gap: 9px;
  padding: 20px;
  text-align: center;
}

.media-slot-icon {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 14px;
  font-size: 1.2rem;
  opacity: 0.75;
}

.media-slot strong {
  font-size: 0.75rem;
  letter-spacing: 0.09em;
  line-height: 1.35;
  text-transform: uppercase;
}

.media-slot small {
  color: var(--muted);
  font-size: 0.69rem;
}

.product-tab {
  position: absolute;
  right: 14px;
  bottom: 14px;
  left: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-radius: 13px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  font-size: 0.73rem;
  font-weight: 900;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.trust-band {
  border-block: 1px solid var(--line);
  background: var(--paper);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.trust-item {
  display: flex;
  min-height: 118px;
  align-items: center;
  gap: 14px;
  padding: 24px;
  border-right: 1px solid var(--line);
}

.trust-item:last-child {
  border-right: 0;
}

.trust-icon {
  display: grid;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--white);
  font-weight: 900;
}

.trust-item h3 {
  margin-bottom: 3px;
  font-size: 0.91rem;
  letter-spacing: -0.015em;
}

.trust-item p {
  color: var(--muted);
  font-size: 0.73rem;
  line-height: 1.45;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.card-grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.info-card {
  position: relative;
  display: flex;
  min-height: 100%;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 28px;
  background: var(--white);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.info-card:hover {
  transform: translateY(-4px);
  border-color: #cbd0d4;
  box-shadow: var(--shadow-sm);
}

.info-card h3 {
  margin-bottom: 12px;
}

.info-card p {
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 0.92rem;
}

.info-card .text-link {
  margin-top: auto;
}

.card-icon {
  display: grid;
  width: 50px;
  height: 50px;
  margin-bottom: 24px;
  place-items: center;
  border-radius: 15px;
  background: var(--surface);
  font-size: 1.2rem;
  font-weight: 900;
}

.card-icon.orange {
  background: var(--orange-pale);
  color: var(--orange-deep);
}

.card-icon.blue {
  background: var(--blue-pale);
  color: var(--blue-deep);
}

.product-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.product-card {
  position: relative;
  display: grid;
  overflow: hidden;
  min-height: 610px;
  grid-template-columns: 0.95fr 1.05fr;
  align-items: center;
  gap: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 42px;
}

.product-card.orange {
  border-color: var(--orange-line);
  background: var(--orange-pale);
}

.product-card.blue {
  border-color: var(--blue-line);
  background: var(--blue-pale);
}

.product-card-copy {
  position: relative;
  z-index: 2;
}

.product-card h3 {
  margin-bottom: 14px;
  font-size: clamp(2rem, 3vw, 2.8rem);
}

.product-card p {
  color: #434a50;
  font-size: 0.96rem;
}

.feature-list {
  display: grid;
  gap: 9px;
  margin: 24px 0 30px;
  padding: 0;
  list-style: none;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.86rem;
  font-weight: 760;
}

.feature-list li::before {
  display: grid;
  flex: 0 0 auto;
  width: 21px;
  height: 21px;
  place-items: center;
  border-radius: 50%;
  background: var(--white);
  content: "✓";
  font-size: 0.68rem;
  font-weight: 900;
}

.product-card .media-slot {
  min-height: 420px;
}

.comparison-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

.comparison-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
  padding: 22px 25px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.comparison-table th {
  background: var(--paper);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.comparison-table th:nth-child(2) {
  color: var(--orange-deep);
}

.comparison-table th:nth-child(3) {
  color: var(--blue-deep);
}

.comparison-table tr:last-child td {
  border-bottom: 0;
}

.comparison-table td {
  color: #485057;
  font-size: 0.91rem;
}

.comparison-table td:first-child {
  color: var(--ink);
  font-weight: 850;
}

.split-routine {
  display: grid;
  overflow: hidden;
  grid-template-columns: 1fr 0.8fr 1fr;
  align-items: stretch;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.split-panel,
.split-center {
  display: flex;
  min-height: 430px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 42px;
  text-align: center;
}

.split-panel.orange {
  background: var(--orange-pale);
}

.split-panel.blue {
  background: var(--blue-pale);
}

.split-panel .media-slot {
  width: 100%;
  max-width: 230px;
  min-height: 275px;
  margin-bottom: 22px;
}

.split-panel h3 {
  margin-bottom: 4px;
}

.split-center {
  position: relative;
  z-index: 2;
  background: var(--white);
}

.split-center h2 {
  margin-bottom: 17px;
  font-size: clamp(2rem, 3.8vw, 3.2rem);
}

.split-center p {
  margin-bottom: 26px;
  color: var(--muted);
  font-size: 0.9rem;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  counter-reset: steps;
}

.step-card {
  counter-increment: steps;
  border-top: 3px solid var(--ink);
  padding: 28px 18px 12px 0;
}

.step-card::before {
  display: grid;
  width: 44px;
  height: 44px;
  margin-bottom: 22px;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: var(--white);
  content: counter(steps, decimal-leading-zero);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.05em;
}

.step-card:nth-child(odd) {
  border-top-color: var(--orange);
}

.step-card:nth-child(even) {
  border-top-color: var(--blue);
}

.step-card h3 {
  margin-bottom: 10px;
  font-size: 1.15rem;
}

.step-card p {
  color: var(--muted);
  font-size: 0.84rem;
}

.ingredient-preview {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 70px;
  align-items: center;
}

.ingredient-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.ingredient-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
  background: var(--white);
}

.ingredient-card:nth-child(1),
.ingredient-card:nth-child(4) {
  transform: translateY(14px);
}

.ingredient-card .ingredient-dot {
  width: 32px;
  height: 5px;
  margin-bottom: 22px;
  border-radius: 99px;
  background: var(--orange);
}

.ingredient-card.blue .ingredient-dot {
  background: var(--blue);
}

.ingredient-card h3 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.ingredient-card p {
  color: var(--muted);
  font-size: 0.79rem;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--white);
}

.faq-question {
  display: flex;
  width: 100%;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border: 0;
  padding: 18px 22px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  font-weight: 850;
}

.faq-symbol {
  position: relative;
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.faq-symbol::before,
.faq-symbol::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 1.5px;
  border-radius: 2px;
  background: var(--ink);
  content: "";
  transform: translate(-50%, -50%);
  transition: transform 180ms ease;
}

.faq-symbol::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-question[aria-expanded="true"] .faq-symbol::after {
  transform: translate(-50%, -50%) rotate(0);
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 220ms ease;
}

.faq-answer > div {
  overflow: hidden;
}

.faq-item.open .faq-answer {
  grid-template-rows: 1fr;
}

.faq-answer p {
  padding: 0 22px 22px;
  color: var(--muted);
  font-size: 0.91rem;
}

.contact-banner {
  position: relative;
  display: grid;
  overflow: hidden;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 30px;
  border-radius: var(--radius-lg);
  padding: clamp(38px, 6vw, 68px);
  background: var(--ink);
  color: var(--white);
}

.contact-banner::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 7px;
  background: linear-gradient(var(--orange) 0 50%, var(--blue) 50%);
  content: "";
}

.contact-banner h2 {
  max-width: 730px;
  margin-bottom: 14px;
}

.contact-banner p {
  max-width: 680px;
  color: rgba(255, 255, 255, 0.68);
}

.page-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(72px, 9vw, 120px);
  background: var(--paper);
}

.page-hero.orange {
  background:
    radial-gradient(circle at 85% 20%, rgba(243, 107, 33, 0.17), transparent 28%),
    var(--orange-pale);
}

.page-hero.blue {
  background:
    radial-gradient(circle at 85% 20%, rgba(22, 119, 200, 0.17), transparent 28%),
    var(--blue-pale);
}

.page-hero.dark {
  background:
    radial-gradient(circle at 85% 20%, rgba(121, 198, 242, 0.15), transparent 28%),
    radial-gradient(circle at 12% 76%, rgba(243, 107, 33, 0.15), transparent 25%),
    var(--ink);
  color: var(--white);
}

.page-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.72fr);
  align-items: center;
  gap: 70px;
}

.page-hero h1 {
  max-width: 850px;
  margin-bottom: 22px;
}

.page-hero .lead {
  max-width: 720px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 1.12rem;
}

.page-hero.dark .lead {
  color: rgba(255, 255, 255, 0.7);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  align-items: center;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 0.77rem;
  font-weight: 720;
}

.breadcrumbs span[aria-hidden="true"] {
  opacity: 0.55;
}

.product-detail-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(380px, 0.88fr);
  gap: 56px;
  align-items: start;
}

.product-gallery {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 18px;
}

.gallery-thumbs {
  display: grid;
  align-content: start;
  gap: 12px;
}

.gallery-thumb {
  display: grid;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  font-size: 0.62rem;
  font-weight: 900;
  text-align: center;
  text-transform: uppercase;
}

.gallery-thumb.active {
  border: 2px solid var(--ink);
  background: var(--white);
  color: var(--ink);
}

.gallery-main .media-slot {
  min-height: 680px;
}

.product-info-panel {
  position: sticky;
  top: calc(var(--header-height) + 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px;
  background: var(--white);
  box-shadow: var(--shadow-md);
}

.product-info-panel h1 {
  margin-bottom: 10px;
  font-size: clamp(2.3rem, 4vw, 3.55rem);
}

.product-subtitle {
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 1rem;
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 25px;
}

.chip {
  display: inline-flex;
  min-height: 31px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 11px;
  background: var(--paper);
  font-size: 0.68rem;
  font-weight: 820;
}

.chip.orange {
  border-color: var(--orange-line);
  background: var(--orange-pale);
  color: var(--orange-deep);
}

.chip.blue {
  border-color: var(--blue-line);
  background: var(--blue-pale);
  color: var(--blue-deep);
}

.supply-title {
  margin: 27px 0 12px;
  font-size: 0.81rem;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.supply-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.supply-option {
  position: relative;
  min-height: 74px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 13px;
  background: var(--white);
  cursor: pointer;
  text-align: left;
}

.supply-option:hover,
.supply-option.selected {
  border-color: var(--orange);
  background: var(--orange-pale);
}

.blue-product .supply-option:hover,
.blue-product .supply-option.selected {
  border-color: var(--blue);
  background: var(--blue-pale);
}

.supply-option strong,
.supply-option small {
  display: block;
}

.supply-option strong {
  font-size: 0.86rem;
}

.supply-option small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.67rem;
}

.product-info-panel .button {
  width: 100%;
  margin-top: 18px;
}

.product-note {
  margin-top: 15px;
  color: var(--muted);
  font-size: 0.72rem;
  text-align: center;
}

.detail-grid {
  display: grid;
  grid-template-columns: 0.65fr 1.35fr;
  gap: 64px;
  align-items: start;
}

.sticky-toc {
  position: sticky;
  top: calc(var(--header-height) + 28px);
  display: grid;
  gap: 4px;
  border-left: 1px solid var(--line);
  padding-left: 18px;
}

.sticky-toc a {
  border-radius: 8px;
  padding: 8px 11px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 750;
}

.sticky-toc a:hover {
  background: var(--surface);
  color: var(--ink);
}

.content-stack {
  display: grid;
  gap: 56px;
}

.content-block {
  scroll-margin-top: 130px;
}

.content-block h2 {
  margin-bottom: 18px;
  font-size: clamp(1.75rem, 3.5vw, 2.6rem);
}

.content-block p,
.content-block li {
  color: #50585e;
}

.content-block ul {
  padding-left: 22px;
}

.notice {
  border: 1px solid var(--line);
  border-left: 5px solid var(--ink);
  border-radius: 14px;
  padding: 22px;
  background: var(--paper);
  color: #41484e;
  font-size: 0.87rem;
}

.notice.orange {
  border-color: var(--orange-line);
  border-left-color: var(--orange);
  background: var(--orange-pale);
}

.notice.blue {
  border-color: var(--blue-line);
  border-left-color: var(--blue);
  background: var(--blue-pale);
}

.notice.warning {
  border-left-color: #c75e00;
  background: #fff6e8;
}

.bundle-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.bundle-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

.bundle-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 290px;
}

.bundle-half {
  display: grid;
  place-items: center;
  padding: 24px;
}

.bundle-half.orange {
  background: var(--orange-pale);
}

.bundle-half.blue {
  background: var(--blue-pale);
}

.bundle-quantity {
  display: grid;
  width: 88px;
  height: 88px;
  place-items: center;
  border: 1px dashed currentColor;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.72);
  font-family: Manrope, sans-serif;
  font-size: 1.4rem;
  font-weight: 900;
}

.bundle-half span {
  display: block;
  margin-top: 12px;
  font-size: 0.72rem;
  font-weight: 850;
  text-align: center;
  text-transform: uppercase;
}

.bundle-body {
  padding: 30px;
}

.bundle-body h2 {
  margin-bottom: 12px;
  font-size: 1.65rem;
}

.bundle-body p {
  color: var(--muted);
  font-size: 0.9rem;
}

.bundle-body .button {
  width: 100%;
  margin-top: 20px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 72px;
  align-items: start;
}

.article-content {
  max-width: 800px;
}

.article-content h2 {
  margin-top: 56px;
  margin-bottom: 18px;
  font-size: clamp(1.7rem, 3.2vw, 2.45rem);
}

.article-content h2:first-child {
  margin-top: 0;
}

.article-content h3 {
  margin-top: 32px;
  margin-bottom: 12px;
  font-size: 1.23rem;
}

.article-content p,
.article-content li {
  color: #4c545a;
}

.article-content li + li {
  margin-top: 7px;
}

.article-content .media-slot {
  margin-block: 32px 46px;
}

.article-aside {
  position: sticky;
  top: calc(var(--header-height) + 28px);
  display: grid;
  gap: 18px;
}

.aside-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
  background: var(--paper);
}

.aside-card h3 {
  margin-bottom: 12px;
  font-size: 1.02rem;
}

.aside-card p,
.aside-card li {
  color: var(--muted);
  font-size: 0.78rem;
}

.aside-card ul {
  margin-bottom: 0;
  padding-left: 18px;
}

.policy-content {
  max-width: 850px;
}

.policy-content h2 {
  margin-top: 48px;
  margin-bottom: 15px;
  font-size: 1.65rem;
}

.policy-content h2:first-child {
  margin-top: 0;
}

.policy-content p,
.policy-content li {
  color: #4b5359;
}

.policy-placeholder {
  display: inline-block;
  border: 1px solid var(--orange-line);
  border-radius: 7px;
  padding: 1px 7px;
  background: var(--orange-pale);
  color: var(--orange-deep);
  font-size: 0.78em;
  font-weight: 850;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.contact-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 30px;
  background: var(--white);
}

.contact-card h2 {
  margin: 20px 0 10px;
  font-size: 1.35rem;
}

.contact-card p {
  color: var(--muted);
  font-size: 0.87rem;
}

.config-note {
  margin-top: 18px;
  border-radius: 10px;
  padding: 10px 12px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.7rem;
}

.site-footer {
  background: var(--ink);
  color: var(--white);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: 38px;
  padding-block: 72px 52px;
}

.footer-brand p {
  max-width: 310px;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.82rem;
}

.footer-column h2 {
  margin-bottom: 18px;
  color: rgba(255, 255, 255, 0.95);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.8rem;
}

.footer-links a:hover {
  color: var(--white);
}

.footer-bottom {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items: end;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-block: 30px 38px;
}

.footer-disclaimer {
  max-width: 880px;
  color: rgba(255, 255, 255, 0.48);
  font-size: 0.69rem;
  line-height: 1.6;
}

.copyright {
  color: rgba(255, 255, 255, 0.48);
  font-size: 0.7rem;
  white-space: nowrap;
}

.floating-contact {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 450;
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  gap: 9px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 999px;
  padding: 12px 17px;
  background: #1d8f53;
  color: var(--white);
  box-shadow: 0 16px 38px rgba(18, 80, 48, 0.28);
  font-size: 0.82rem;
  font-weight: 850;
}

.floating-contact:hover {
  transform: translateY(-2px);
}

.mobile-sticky {
  display: none;
}

.reveal {
  opacity: 1;
  transform: none;
}

.js-enabled .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 550ms ease, transform 550ms ease;
}

.js-enabled .reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.empty-state {
  border: 1px dashed var(--line);
  border-radius: var(--radius-md);
  padding: 44px;
  background: var(--paper);
  text-align: center;
}

.empty-state h3 {
  margin-bottom: 10px;
}

.empty-state p {
  max-width: 560px;
  margin-inline: auto;
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 1120px) {
  .desktop-nav {
    display: none;
  }

  .menu-button {
    display: inline-flex;
  }

  html:not(.js-enabled) .mobile-nav {
    display: block;
  }

  .hero-grid {
    grid-template-columns: 1fr 0.95fr;
    gap: 38px;
  }

  .product-card {
    grid-template-columns: 1fr;
    padding: 34px;
  }

  .product-card .media-slot {
    min-height: 330px;
  }

  .footer-top {
    grid-template-columns: 1.4fr repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .hero-grid {
    min-height: 0;
    grid-template-columns: 1fr;
    padding-block: 64px;
  }

  .hero-visual {
    width: min(100%, 650px);
    min-height: 520px;
    margin-inline: auto;
  }

  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .trust-item:nth-child(2) {
    border-right: 0;
  }

  .trust-item:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .card-grid,
  .card-grid.four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-pair {
    grid-template-columns: 1fr;
  }

  .product-card {
    min-height: 0;
    grid-template-columns: 0.8fr 1.2fr;
  }

  .split-routine {
    grid-template-columns: 1fr 1fr;
  }

  .split-center {
    grid-column: 1 / -1;
    grid-row: 2;
    min-height: 320px;
  }

  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .ingredient-preview,
  .page-hero-grid,
  .product-detail-hero,
  .detail-grid,
  .article-layout {
    grid-template-columns: 1fr;
  }

  .product-info-panel,
  .sticky-toc,
  .article-aside {
    position: static;
  }

  .sticky-toc {
    display: none;
  }

  .article-aside {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-banner {
    grid-template-columns: 1fr;
  }

  .bundle-grid {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
    padding-bottom: 70px;
  }

  .container,
  .narrow {
    width: min(calc(100% - 28px), var(--container));
  }

  .utility-inner {
    justify-content: flex-start;
    overflow-x: auto;
    gap: 18px;
    padding-block: 7px;
    scrollbar-width: none;
  }

  .utility-inner::-webkit-scrollbar {
    display: none;
  }

  .utility-item {
    flex: 0 0 auto;
  }

  .header-inner {
    min-height: 68px;
  }

  .wordmark {
    font-size: 0.94rem;
  }

  .wordmark-divider {
    margin-inline: 1px;
  }

  .hero-grid {
    padding-block: 52px 60px;
  }

  .hero-copy h1 {
    font-size: clamp(2.6rem, 13vw, 3.7rem);
  }

  .button-row {
    align-items: stretch;
  }

  .button-row .button {
    flex: 1 1 100%;
  }

  .hero-visual {
    min-height: 440px;
  }

  .hero-product {
    width: 59%;
  }

  .hero-product.artro {
    left: 0;
  }

  .hero-product.arti {
    right: 0;
  }

  .media-slot-content {
    max-width: 92%;
    padding: 14px;
  }

  .product-tab {
    right: 8px;
    bottom: 8px;
    left: 8px;
    padding: 9px 10px;
    font-size: 0.58rem;
  }

  .trust-grid {
    grid-template-columns: 1fr;
  }

  .trust-item,
  .trust-item:nth-child(2) {
    min-height: 94px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .trust-item:last-child {
    border-bottom: 0;
  }

  .card-grid,
  .card-grid.four,
  .ingredient-grid,
  .steps-grid,
  .contact-grid,
  .article-aside {
    grid-template-columns: 1fr;
  }

  .info-card {
    padding: 24px;
  }

  .product-card {
    grid-template-columns: 1fr;
    padding: 25px;
  }

  .product-card .media-slot {
    min-height: 360px;
  }

  .split-routine {
    grid-template-columns: 1fr;
  }

  .split-panel,
  .split-center {
    min-height: 0;
    padding: 34px 24px;
  }

  .split-center {
    grid-column: 1;
    grid-row: 2;
  }

  .split-panel.blue {
    grid-row: 3;
  }

  .ingredient-card:nth-child(1),
  .ingredient-card:nth-child(4) {
    transform: none;
  }

  .contact-banner {
    padding: 38px 28px;
  }

  .page-hero {
    padding-block: 58px;
  }

  .page-hero-grid {
    gap: 36px;
  }

  .product-gallery {
    grid-template-columns: 1fr;
  }

  .gallery-thumbs {
    grid-template-columns: repeat(4, 1fr);
    order: 2;
  }

  .gallery-main .media-slot {
    min-height: 500px;
  }

  .product-info-panel {
    padding: 25px;
  }

  .supply-options {
    grid-template-columns: 1fr 1fr;
  }

  .bundle-visual {
    min-height: 230px;
  }

  .article-content h2 {
    margin-top: 44px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    padding-block: 56px 36px;
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    grid-template-columns: 1fr;
  }

  .floating-contact {
    display: none;
  }

  .mobile-sticky {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 480;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    border-top: 1px solid var(--line);
    padding: 9px max(10px, env(safe-area-inset-right)) calc(9px + env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left));
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 -12px 30px rgba(11, 13, 15, 0.08);
    backdrop-filter: blur(16px);
  }

  .mobile-sticky .button {
    min-height: 45px;
    padding: 10px 12px;
    font-size: 0.77rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media print {
  .utility-bar,
  .site-header,
  .floating-contact,
  .mobile-sticky,
  .contact-banner,
  .site-footer {
    display: none !important;
  }

  body {
    color: #000;
  }

  .section,
  .page-hero {
    padding-block: 30px;
  }
}