/* =================================================================
   N°55 LABORATORIUM — shared stylesheet
   ================================================================= */

/* ----- Reset & base ----- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-sans);
  font-weight: 300;
  font-size: 15px;
  line-height: 1.6;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ----- Design tokens ----- */
:root {
  --paper:    #EFE7D2;
  --paper-2:  #E8DFC6;
  --paper-3:  #DDD2B5;
  --ink:      #2A2620;
  --graphite: #3D3327;
  --taupe:    #6F624B;
  --mist:     #BFB59C;
  --hair:     #D4C8AC;
  --sage:     #92957C;

  --f-serif: 'Playfair Display', 'Times New Roman', serif;
  --f-sans:  'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --f-mono:  'JetBrains Mono', ui-monospace, monospace;

  --max: 1480px;
  --pad: clamp(20px, 4vw, 64px);
}

::selection { background: var(--ink); color: var(--paper); }

/* =================================================================
   NAVIGATION (shared on every page)
   ================================================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 22px var(--pad);
  background: rgba(239, 231, 210, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hair);
  transition: background .35s ease;
}
.nav .brand {
  text-decoration: none;
  justify-self: start;
  display: inline-flex;
  align-items: center;
  min-width: 44px;
  min-height: 44px;
}
.nav .brand img {
  display: block;
  width: auto;
  height: 54px;
}
.nav .links {
  display: flex;
  gap: 42px;
  justify-self: center;
}
.nav .links a {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--graphite);
  text-decoration: none;
  position: relative;
  transition: color .3s ease;
}
.nav .links a:hover, .nav .links a.active { color: var(--ink); }
.nav .links a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s cubic-bezier(.7,0,.3,1);
}
.nav .links a:hover::after, .nav .links a.active::after { transform: scaleX(1); }
.nav .meta {
  justify-self: end;
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--taupe);
  display: flex;
  gap: 22px;
}
.nav .meta a {
  color: var(--taupe);
  text-decoration: none;
  transition: color .3s ease;
}
.nav .meta a:hover { color: var(--ink); }

/* =================================================================
   FOOTER (shared on every page)
   ================================================================= */
footer {
  margin-top: 80px;
  border-top: 1px solid var(--hair);
  padding: 80px var(--pad) 36px;
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}
.foot-closing {
  text-align: center;
  margin-bottom: 56px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--graphite);
}
.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 56px;
  margin-bottom: 64px;
}
.foot-mark .brandsvg {
  width: 110px;
  color: var(--ink);
  margin-bottom: 14px;
}
.foot-mark .brandsvg svg, .foot-mark img {
  width: 100%; height: auto; display: block;
}
.foot-mark .sub {
  font-family: var(--f-mono); font-size: 10px;
  letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--taupe); margin-top: 8px;
  display: block;
}
.foot-mark p {
  font-size: 13.5px; color: var(--graphite);
  max-width: 32ch; margin-top: 16px;
}
.foot-col h5 {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--taupe);
  margin-bottom: 18px;
  font-weight: 400;
}
.foot-col ul { list-style: none; }
.foot-col li { margin-bottom: 10px; }
.foot-col a {
  color: var(--ink);
  text-decoration: none;
  font-size: 13.5px;
  transition: color .3s ease;
}
.foot-col a:hover { color: var(--taupe); }
.foot-bottom {
  border-top: 1px solid var(--hair);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--taupe);
}
@media (max-width: 900px) {
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}
@media (max-width: 560px) {
  .foot-grid { grid-template-columns: 1fr; }
}

/* =================================================================
   GLOBAL UTILITIES
   ================================================================= */
.kicker {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--taupe);
}
.eyebrow {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--taupe);
}
.serif { font-family: var(--f-serif); }
.italic { font-style: italic; }

/* Reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1.2s cubic-bezier(.2,.7,.2,1), transform 1.2s cubic-bezier(.2,.7,.2,1);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* =================================================================
   HOME PAGE
   ================================================================= */
.home-hero {
  min-height: 100vh;
  padding: 110px var(--pad) 60px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  max-width: var(--max);
  margin: 0 auto;
  position: relative;
}

.home-hero .top-meta {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
  border-top: 1px solid var(--hair);
  padding-top: 22px;
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--taupe);
  opacity: 0;
  animation: rise .9s .15s cubic-bezier(.2,.7,.2,1) forwards;
}
.home-hero .top-meta .item { display: flex; flex-direction: column; gap: 4px; }
.home-hero .top-meta .item .v { color: var(--ink); letter-spacing: 0.12em; }
.home-hero .top-meta .item:nth-child(2) { justify-self: center; text-align: center; }
.home-hero .top-meta .item:nth-child(3) { justify-self: end; text-align: right; }

.home-hero .center {
  display: grid;
  place-items: center;
  text-align: center;
  position: relative;
  padding: 40px 0;
}

.home-hero .ghost-55 {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--f-serif);
  font-style: italic;
  font-size: clamp(300px, 56vw, 760px);
  line-height: 0.85;
  color: var(--paper-2);
  z-index: 0;
  user-select: none;
  pointer-events: none;
  letter-spacing: -0.06em;
  opacity: 0;
  animation: rise 1.6s .2s cubic-bezier(.2,.7,.2,1) forwards;
}

.home-hero .lockup {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  gap: 30px;
}
.home-hero .lockup .brandsvg {
  width: clamp(200px, 28vw, 340px);
  color: var(--ink);
  opacity: 0;
  animation: rise 1.1s .35s cubic-bezier(.2,.7,.2,1) forwards;
}
.home-hero .lockup .brandsvg svg { width: 100%; height: auto; display: block; }

.home-hero .lockup .tagline {
  font-family: var(--f-mono);
  font-size: clamp(13px, 1.2vw, 16px);
  letter-spacing: 0.45em;
  text-transform: uppercase;
  color: var(--graphite);
  padding-left: 0.45em;
  opacity: 0;
  animation: rise 1.1s .6s cubic-bezier(.2,.7,.2,1) forwards;
}

.home-hero .lockup .northern {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--taupe);
  margin-top: 4px;
  opacity: 0;
  animation: rise 1.1s .8s cubic-bezier(.2,.7,.2,1) forwards;
}
.home-hero .lockup .northern .compass {
  width: 36px; height: 36px; opacity: 0.85;
}

.home-hero .foot {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: end;
  gap: 40px;
  border-top: 1px solid var(--hair);
  padding-top: 26px;
  opacity: 0;
  animation: rise .9s 1.05s cubic-bezier(.2,.7,.2,1) forwards;
}
.home-hero .foot .manifest {
  font-family: var(--f-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(16px, 1.4vw, 20px);
  line-height: 1.5;
  color: var(--graphite);
  max-width: 42ch;
}
.home-hero .foot .center-meta {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--taupe);
  text-align: center;
  line-height: 1.8;
}
.home-hero .foot .center-meta .big {
  display: block;
  font-size: 13px;
  color: var(--ink);
  letter-spacing: 0.15em;
  margin-bottom: 4px;
}
.home-hero .foot .enter {
  justify-self: end;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 6px;
  transition: gap .35s ease;
}
.home-hero .foot .enter:hover { gap: 22px; }

@keyframes rise {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Home: feature strip below hero ---- */
.home-strip {
  border-top: 1px solid var(--hair);
  background: var(--paper-2);
  padding: 100px var(--pad);
}
.home-strip-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.home-strip-inner .text h2 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.005em;
  margin-bottom: 28px;
}
.home-strip-inner .text h2 em {
  font-style: italic;
  color: var(--graphite);
}
.home-strip-inner .text p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--graphite);
  margin-bottom: 16px;
  max-width: 44ch;
}
.home-strip-inner .text .more {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 6px;
  margin-top: 16px;
  transition: gap .35s ease;
}
.home-strip-inner .text .more:hover { gap: 22px; }

.home-strip-inner .visual {
  aspect-ratio: 4/5;
  background: linear-gradient(160deg, #DDD3B7 0%, #C8BD9C 60%, #B5A883 100%);
  border: 1px solid var(--hair);
  position: relative;
  overflow: hidden;
}
.home-strip-inner .visual::after {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(255,250,235,0.5), transparent 50%),
    radial-gradient(ellipse at 80% 90%, rgba(0,0,0,0.18), transparent 50%);
}
.home-strip-inner .visual .float-num {
  position: absolute;
  bottom: 28px; right: 28px;
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 130px;
  color: rgba(42,38,32,0.20);
  line-height: 1;
  z-index: 2;
}
.home-strip-inner .visual .marker {
  position: absolute;
  top: 28px; left: 28px;
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink);
  z-index: 2;
}

@media (max-width: 900px) {
  .home-strip-inner { grid-template-columns: 1fr; gap: 50px; }
}

/* ---- Home: entry tiles (Skincare / System / Philosophy / Journal) ---- */
.home-tiles {
  padding: 100px var(--pad);
  max-width: var(--max);
  margin: 0 auto;
}
.home-tiles-head {
  text-align: center;
  margin-bottom: 60px;
}
.home-tiles-head h2 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.15;
  margin-top: 14px;
}
.home-tiles-head h2 em { font-style: italic; color: var(--graphite); }

.tiles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: var(--hair);
  border: 1px solid var(--hair);
}
.tile {
  background: var(--paper);
  padding: 60px 48px;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 320px;
  position: relative;
  transition: background .4s ease;
}
.tile:hover { background: var(--paper-2); }
.tile .num {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--taupe);
}
.tile h3 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(32px, 3.4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.005em;
  margin-top: 24px;
}
.tile h3 em { font-style: italic; color: var(--graphite); }
.tile .desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--graphite);
  max-width: 36ch;
  margin-top: 16px;
}
.tile .arrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  margin-top: 32px;
  transition: gap .35s ease;
}
.tile:hover .arrow { gap: 22px; }

@media (max-width: 700px) {
  .tiles { grid-template-columns: 1fr; }
  .tile { padding: 44px 32px; min-height: 240px; }
}

/* =================================================================
   SKINCARE OVERVIEW PAGE
   ================================================================= */
.page-head {
  padding: 160px var(--pad) 60px;
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 200px 1fr 280px;
  gap: 60px;
  align-items: end;
  border-bottom: 1px solid var(--hair);
}
.page-head .eyebrow { align-self: start; padding-top: 8px; }
.page-head h1 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(54px, 7vw, 110px);
  line-height: 0.95;
  letter-spacing: -0.015em;
}
.page-head h1 em { font-style: italic; color: var(--graphite); }
.page-head .intro {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: clamp(15px, 1.3vw, 18px);
  line-height: 1.6;
  color: var(--graphite);
}
@media (max-width: 1000px) {
  .page-head { grid-template-columns: 1fr; gap: 32px; align-items: start; }
  .page-head .intro { order: 2; }
}

/* ---- Skincare grid ---- */
.skincare-grid-wrap {
  padding: 80px var(--pad) 100px;
  max-width: var(--max);
  margin: 0 auto;
}
.skincare-filters {
  display: flex;
  gap: 32px;
  margin-bottom: 60px;
  border-bottom: 1px solid var(--hair);
  padding-bottom: 22px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}
.skincare-filters a {
  color: var(--taupe);
  text-decoration: none;
  transition: color .3s ease;
}
.skincare-filters a.active, .skincare-filters a:hover { color: var(--ink); }

.skincare-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--hair);
}
.skincare-card {
  background: var(--paper);
  padding: 50px 36px 44px;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-height: 480px;
  transition: background .4s ease;
  position: relative;
  border-right: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
}
.skincare-card:nth-child(3n) { border-right: none; }
/* on overflow rows, last child also strips bottom border */
.skincare-card:last-child { border-bottom: none; }
.skincare-card:hover { background: var(--paper-2); }
.skincare-card .ref {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--taupe);
}
.skincare-card .img-area {
  flex: 1;
  display: grid;
  place-items: center;
  margin: 8px 0;
  min-height: 200px;
}
.skincare-card .img-area svg {
  height: 220px;
  width: auto;
  display: block;
}
.skincare-card .name {
  font-family: var(--f-serif);
  font-weight: 500;
  font-size: 28px;
  line-height: 1.1;
  color: var(--ink);
  letter-spacing: 0.005em;
}
.skincare-card .type {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 15px;
  color: var(--graphite);
  margin-top: 4px;
}
.skincare-card .meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--taupe);
  padding-top: 16px;
  border-top: 1px solid var(--hair);
}
.skincare-card .meta .arrow {
  color: var(--graphite);
  transition: transform .35s ease;
}
.skincare-card:hover .meta .arrow { transform: translateX(8px); }

@media (max-width: 1000px) {
  .skincare-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .skincare-grid { grid-template-columns: 1fr; }
}

/* =================================================================
   SINGLE PRODUCT PAGE
   ================================================================= */
.product-hero {
  padding: 140px var(--pad) 80px;
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: stretch;
}

.product-visual {
  background: var(--paper-2);
  border: 1px solid var(--hair);
  min-height: 720px;
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
}
/* Calibration crosshairs */
.product-visual::before, .product-visual::after {
  content: '';
  position: absolute;
  background: var(--mist);
  opacity: 0.35;
}
.product-visual::before { left: 50%; top: 32px; bottom: 32px; width: 1px; }
.product-visual::after  { top: 50%; left: 32px; right: 32px; height: 1px; }
.product-visual .corner {
  position: absolute;
  width: 16px; height: 16px;
  border: 1px solid var(--taupe);
  z-index: 3;
}
.product-visual .corner.tl { top: 16px; left: 16px; border-right: none; border-bottom: none; }
.product-visual .corner.tr { top: 16px; right: 16px; border-left: none; border-bottom: none; }
.product-visual .corner.bl { bottom: 16px; left: 16px; border-right: none; border-top: none; }
.product-visual .corner.br { bottom: 16px; right: 16px; border-left: none; border-top: none; }

.product-visual .placeholder {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--taupe);
  text-align: center;
  line-height: 2;
}
.product-visual .placeholder .ref {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 56px;
  color: var(--mist);
  letter-spacing: 0;
  display: block;
  margin-bottom: 16px;
}

.product-info {
  padding: 12px 0;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.product-info .breadcrumb {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--taupe);
}
.product-info .breadcrumb a {
  color: var(--taupe);
  text-decoration: none;
  transition: color .3s ease;
}
.product-info .breadcrumb a:hover { color: var(--ink); }
.product-info h1 {
  font-family: var(--f-serif);
  font-weight: 500;
  font-size: clamp(56px, 7vw, 96px);
  line-height: 0.95;
  letter-spacing: -0.005em;
  color: var(--ink);
  margin-top: -4px;
}
.product-info .pet {
  font-family: var(--f-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(20px, 2vw, 26px);
  line-height: 1.3;
  color: var(--graphite);
  margin-top: -10px;
}
.product-info .lede {
  font-size: 16px;
  line-height: 1.7;
  color: var(--graphite);
  max-width: 42ch;
  margin-top: 8px;
}
.product-info .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}
.product-info .tags span {
  padding: 8px 16px;
  border: 1px solid var(--hair);
  border-radius: 100px;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--graphite);
}
.product-info .price-block {
  margin-top: 4px;
  padding-top: 22px;
  border-top: 1px solid var(--hair);
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.product-info .price-block .price {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 32px;
  color: var(--ink);
}
.product-info .price-block .size {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--taupe);
}
.product-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}
.product-info .cta {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  align-self: flex-start;
  background: var(--ink);
  color: var(--paper);
  padding: 20px 42px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--ink);
  margin-top: 4px;
  transition: background .35s ease, color .35s ease, transform .35s ease;
}
.product-info .cta:hover {
  background: transparent;
  color: var(--ink);
  transform: translateX(4px);
}
.product-info .cta-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--hair-strong);
}
.product-info .cta-secondary:hover {
  background: var(--paper-deep);
  border-color: var(--ink);
  color: var(--ink);
}
.product-info .cta .arr { transition: transform .4s ease; }
.product-info .cta:hover .arr { transform: translateX(8px); }
.refill-note {
  max-width: 34ch;
  margin: -6px 0 0;
  color: var(--taupe);
  font-size: 13px;
  line-height: 1.55;
}

@media (max-width: 1000px) {
  .product-hero { grid-template-columns: 1fr; gap: 50px; }
  .product-visual { min-height: 480px; }
}

/* ---- Product page sections ---- */
.product-section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 100px var(--pad);
  border-top: 1px solid var(--hair);
}
.product-section .head {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
  margin-bottom: 50px;
  align-items: baseline;
}
.product-section .head .eyebrow { padding-top: 8px; }
.product-section .head h2 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(32px, 4vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.005em;
}
.product-section .head h2 em { font-style: italic; color: var(--graphite); }
.product-section .body {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
}
.product-section .body > .spacer { /* empty for alignment */ }
.product-section .body > .content {
  font-size: 16px;
  line-height: 1.75;
  color: var(--graphite);
  max-width: 62ch;
}
.product-section .body > .content p { margin-bottom: 18px; }
.product-section .body > .content p:last-child { margin-bottom: 0; }

@media (max-width: 900px) {
  .product-section .head, .product-section .body {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

/* INCI block */
.inci-block {
  font-family: var(--f-sans);
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--graphite);
  column-count: 2;
  column-gap: 50px;
}
.inci-section { background: var(--surface-sage); }
.inci-declaration {
  max-width: 90ch;
  color: var(--graphite);
  font-size: .9375rem;
  line-height: 1.85;
}
.inci-status {
  margin-top: 24px;
  padding-left: 18px;
  border-left: 3px solid var(--product-accent, var(--signal));
  color: var(--graphite);
  font-size: .8125rem;
  line-height: 1.65;
}
.inci-block .ing {
  break-inside: avoid;
}
@media (max-width: 700px) {
  .inci-block { column-count: 1; }
}

/* Ritual steps */
.ritual-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hair);
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
}
.ritual-step {
  background: var(--paper);
  padding: 40px 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 180px;
}
.ritual-step .num {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--taupe);
}
.ritual-step .title {
  font-family: var(--f-serif);
  font-weight: 500;
  font-style: italic;
  font-size: 22px;
  color: var(--ink);
  line-height: 1.2;
}
.ritual-step p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--graphite);
}
@media (max-width: 800px) {
  .ritual-steps { grid-template-columns: 1fr; }
}

/* Specs table */
.specs-table {
  width: 100%;
  border-collapse: collapse;
}
.specs-table tr {
  border-bottom: 1px solid var(--hair);
}
.specs-table td {
  padding: 18px 0;
  font-size: 15px;
  vertical-align: top;
}
.specs-table td:first-child {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--taupe);
  width: 220px;
}
.specs-table td:last-child {
  font-family: var(--f-serif);
  font-style: italic;
  color: var(--ink);
  font-size: 16px;
}

/* Pairing block */
.pairing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}
.pairing-card {
  background: var(--paper);
  padding: 40px 28px;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 320px;
  transition: background .4s ease;
}
.pairing-card:hover { background: var(--paper-2); }
.pairing-card .ref {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--taupe);
}
.pairing-card .img {
  flex: 1;
  display: grid;
  place-items: center;
  min-height: 140px;
}
.pairing-card .img svg { height: 140px; width: auto; }
.pairing-card .name {
  font-family: var(--f-serif);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: 0.005em;
}
.pairing-card .type {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 14px;
  color: var(--graphite);
  margin-top: 2px;
}
@media (max-width: 800px) {
  .pairing-grid { grid-template-columns: 1fr; }
}

/* =================================================================
   N°55 PRODUCTISATION PASS
   Clear decisions, accessible navigation, quiet clinical warmth
   ================================================================= */

:root {
  --surface: #FAF8F3;
  --surface-strong: #FFFDF9;
  --surface-sage: #E4E8DF;
  --signal: #31594D;
  --signal-dark: #24443B;
  --focus: #155EEF;
  --max-copy: 68ch;
  --nav-height: 76px;
}

html { scroll-padding-top: calc(var(--nav-height) + 24px); }
body {
  background: var(--surface);
  font-size: 16px;
  line-height: 1.65;
  overflow-wrap: break-word;
}
body::before { display: none; }
body.menu-open { overflow: hidden; }
main { display: block; }
[hidden] { display: none !important; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  z-index: 1000;
  inset-block-start: 10px;
  inset-inline-start: 10px;
  padding: 12px 18px;
  background: var(--ink);
  color: var(--surface-strong);
  transform: translateY(-150%);
  text-decoration: none;
}
.skip-link:focus { transform: translateY(0); }
:where(a, button, input, summary):focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }

/* Navigation */
.nav {
  min-height: var(--nav-height);
  padding: 0 var(--pad);
  grid-template-columns: 1fr auto 1fr;
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  border-color: color-mix(in srgb, var(--ink) 15%, transparent);
  backdrop-filter: blur(10px);
}
.nav .brand img { height: 54px; }
.nav .links { display: flex; gap: clamp(22px, 3vw, 42px); }
.nav .links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--graphite);
  font-family: var(--f-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}
.nav .links a::after { bottom: 6px; }
.nav .links a[aria-current="page"] { color: var(--ink); }
.nav-cta {
  justify-self: end;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 18px;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
}
.nav-cta:hover { background: var(--ink); color: var(--surface-strong); }
.nav-toggle {
  display: none;
  inline-size: 46px;
  block-size: 46px;
  border: 1px solid var(--hair);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}
.nav-toggle > span[aria-hidden] { display: block; inline-size: 20px; block-size: 1px; margin: 6px auto; background: currentColor; }

/* Shared controls */
.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  border: 1px solid var(--signal);
  background: var(--signal);
  color: #fff;
  font-family: var(--f-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0;
  text-decoration: none;
  cursor: pointer;
  transition: background .22s ease-out, border-color .22s ease-out, color .22s ease-out, transform .22s ease-out;
}
.button:hover { background: var(--signal-dark); border-color: var(--signal-dark); transform: translateY(-1px); }
.button-secondary { background: transparent; color: var(--signal); }
.button-secondary:hover { color: #fff; }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--signal-dark);
  font-weight: 600;
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
}
.text-link:hover { text-decoration: underline; }
.section-label,
.context-line,
.product-role {
  color: var(--signal-dark);
  font-family: var(--f-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
  text-transform: none;
}
.context-line { margin-bottom: 20px; }
.section-label { margin-bottom: 14px; }

/* Homepage */
.brand-hero {
  min-height: min(850px, calc(100vh - var(--nav-height)));
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(128px, 16vh, 190px) var(--pad) clamp(72px, 9vw, 120px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(380px, .75fr);
  gap: clamp(56px, 8vw, 120px);
  align-items: center;
}
.hero-copy h1,
.page-intro h1 {
  max-width: 13ch;
  font-family: var(--f-sans);
  font-size: clamp(48px, 6.5vw, 88px);
  font-weight: 500;
  line-height: .98;
  letter-spacing: -.035em;
}
.hero-lede {
  max-width: 57ch;
  margin-top: 30px;
  color: var(--graphite);
  font-size: clamp(18px, 1.7vw, 22px);
  line-height: 1.55;
}
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; margin-top: 34px; }
.proof-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 42px;
  padding-top: 24px;
  border-top: 1px solid var(--hair);
  color: var(--graphite);
  font-size: 13px;
  list-style: none;
}
.proof-list li::before { content: '✓'; margin-inline-end: 8px; color: var(--signal); font-weight: 700; }
.starter-visual {
  align-self: stretch;
  padding: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-rows: minmax(260px, 1fr) auto;
  gap: 28px;
  background: var(--surface-sage);
  border: 1px solid color-mix(in srgb, var(--signal) 18%, transparent);
}
.starter-products { display: flex; justify-content: center; align-items: end; gap: clamp(10px, 3vw, 34px); min-height: 280px; }
.starter-products img { width: min(36%, 155px); height: auto; max-height: 350px; }
.starter-products img:is([src$=".png"], [src$=".jpg"]) { width: min(44%, 220px); height: 280px; max-height: none; object-fit: contain; }
.starter-visual h2 { max-width: 15ch; font-family: var(--f-sans); font-size: clamp(28px, 3vw, 40px); font-weight: 500; line-height: 1.08; letter-spacing: -.025em; }
.starter-visual p:not(.section-label) { max-width: 48ch; margin: 16px 0 22px; color: var(--graphite); }

.decision-section,
.routine-summary,
.catalog,
.serum-guide,
.full-routine,
.journal-links {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(76px, 9vw, 130px) var(--pad);
}
.section-intro { max-width: 720px; margin-bottom: clamp(38px, 5vw, 68px); }
.section-intro h2,
.science-band h2,
.launch-band h2,
.starter-band h2,
.start-protocol h2,
.am-pm h2,
.launch-form-section h2,
.catalog-toolbar h2 {
  font-family: var(--f-sans);
  font-size: clamp(34px, 4.5vw, 58px);
  font-weight: 500;
  line-height: 1.04;
  letter-spacing: -.03em;
}
.section-intro > p:last-child { max-width: 58ch; margin-top: 18px; color: var(--graphite); font-size: 18px; }
.decision-list { border-top: 1px solid var(--hair); }
.decision-list a {
  min-height: 106px;
  display: grid;
  grid-template-columns: minmax(180px, .55fr) 1fr auto;
  gap: 30px;
  align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid var(--hair);
  color: var(--ink);
  text-decoration: none;
}
.decision-list a > span:first-child { color: var(--graphite); font-size: 14px; }
.decision-list strong { font-family: var(--f-sans); font-size: clamp(21px, 2.4vw, 30px); font-weight: 500; }
.decision-list a > span:last-child { font-size: 24px; transition: transform .22s ease-out; }
.decision-list a:hover > span:last-child { transform: translateX(5px); }

.origin-band {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(72px, 8vw, 118px) var(--pad);
  display: grid;
  grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  gap: clamp(52px, 8vw, 120px);
  align-items: start;
  border-top: 1px solid var(--hair);
}
.origin-statement > p { margin-bottom: 20px; color: var(--signal-dark); font-size: 15px; font-weight: 600; }
.origin-statement h2 {
  max-width: 13ch;
  font-family: var(--f-sans);
  font-size: clamp(36px, 4.7vw, 62px);
  font-weight: 500;
  line-height: 1.03;
  letter-spacing: -.03em;
}
.origin-notes { border-top: 1px solid var(--hair); }
.origin-notes > div {
  display: grid;
  grid-template-columns: minmax(130px, .36fr) 1fr;
  gap: 28px;
  padding: 23px 0;
  border-bottom: 1px solid var(--hair);
}
.origin-notes dt { color: var(--signal-dark); font-size: 13px; font-weight: 700; }
.origin-notes dd { max-width: 48ch; color: var(--graphite); font-size: 17px; line-height: 1.55; }

@media (max-width: 800px) {
  .origin-band { grid-template-columns: 1fr; gap: 42px; }
  .origin-statement h2 { max-width: 16ch; }
  .origin-notes > div { grid-template-columns: 1fr; gap: 8px; }
}

.routine-summary { max-width: none; background: var(--ink); color: var(--surface); }
.routine-summary > * { max-width: calc(var(--max) - (2 * var(--pad))); margin-inline: auto; }
.routine-summary .section-label,
.routine-summary .section-intro > p:last-child { color: #D7D9CE; }
.routine-track { margin-bottom: 38px; border-top: 1px solid rgba(255,255,255,.25); list-style: none; }
.routine-track li { display: grid; grid-template-columns: 90px 1fr; border-bottom: 1px solid rgba(255,255,255,.2); }
.routine-track li > span { padding: 22px 20px 22px 0; color: #BFC9C4; font-size: 13px; }
.routine-track a { min-height: 92px; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 18px 0; color: #fff; text-decoration: none; }
.routine-track strong { font-family: var(--f-sans); font-size: 20px; font-weight: 500; }
.routine-track small { color: #C9CEC8; font-size: 14px; }
.routine-summary .button-secondary { border-color: #fff; color: #fff; }

.science-band,
.launch-band,
.am-pm {
  padding: clamp(76px, 9vw, 130px) max(var(--pad), calc((100vw - var(--max)) / 2 + var(--pad)));
  display: grid;
  grid-template-columns: .85fr 1fr;
  gap: clamp(50px, 8vw, 120px);
}
.science-band { background: var(--surface-sage); }
.science-band > div:last-child { max-width: 58ch; }
.science-band p:not(.section-label) { margin-bottom: 18px; font-size: 18px; color: var(--graphite); }
.launch-band { align-items: center; background: var(--paper-pressed); }
.launch-band p { max-width: 46ch; color: var(--graphite); }
.launch-band .button { justify-self: start; }

/* Page introductions and product catalog */
.page-intro {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(140px, 17vw, 210px) var(--pad) clamp(70px, 8vw, 110px);
  display: grid;
  grid-template-columns: 1.25fr .65fr;
  gap: clamp(50px, 8vw, 110px);
  align-items: end;
  border-bottom: 1px solid var(--hair);
}
.page-intro > p { max-width: 46ch; color: var(--graphite); font-size: 18px; }
.starter-band,
.start-protocol,
.launch-form-section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(64px, 8vw, 110px) var(--pad);
  display: grid;
  grid-template-columns: .8fr 1fr;
  gap: clamp(46px, 8vw, 110px);
  align-items: center;
  background: var(--surface-sage);
}
.starter-mini-products { min-height: 260px; display: flex; align-items: center; justify-content: center; gap: 24px; }
.starter-mini-products img { width: min(26%, 105px); height: auto; max-height: 260px; }
.starter-mini-products img:is([src$=".png"], [src$=".jpg"]) { width: min(42%, 180px); height: 230px; max-height: none; object-fit: contain; }
.starter-mini-products span { color: var(--signal); font-size: 30px; }
.starter-band > div:last-child > p:not(.section-label),
.start-protocol > div:first-child > p:not(.section-label) { max-width: 56ch; margin: 20px 0; color: var(--graphite); }
.catalog-toolbar { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 44px; }
.filter-group { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-group button {
  min-height: 44px;
  padding: 9px 15px;
  border: 1px solid var(--hair);
  border-radius: 100px;
  background: transparent;
  color: var(--graphite);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}
.filter-group button[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: #fff; }
.catalog-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--hair); border-left: 1px solid var(--hair); }
.catalog-item { min-width: 0; display: grid; grid-template-rows: 360px 1fr; border-right: 1px solid var(--hair); border-bottom: 1px solid var(--hair); background: var(--surface-strong); }
.catalog-image { display: flex; align-items: center; justify-content: center; padding: 34px; background: var(--paper-deep); }
.catalog-image img { width: auto; height: 250px; max-width: 100%; transition: transform .28s ease-out; }
.catalog-image:has(img:is([src$=".png"], [src$=".jpg"])) { padding: 0; align-items: stretch; overflow: hidden; }
.catalog-image img:is([src$=".png"], [src$=".jpg"]) { width: 100%; height: 100%; max-width: none; max-height: none; object-fit: cover; object-position: center 30%; }
.catalog-image:hover img { transform: translateY(-4px); }
.catalog-copy { padding: 30px; display: flex; flex-direction: column; align-items: flex-start; }
.catalog-copy h2 { margin-top: 10px; font-family: var(--f-serif); font-size: 30px; font-weight: 500; }
.catalog-copy h2 a { color: var(--ink); text-decoration: none; }
.catalog-copy > p { margin: 7px 0 24px; color: var(--graphite); }
.catalog-meta { width: 100%; display: flex; justify-content: space-between; gap: 16px; padding-top: 16px; margin-top: auto; border-top: 1px solid var(--hair); color: var(--graphite); font-size: 13px; }
.catalog-copy .text-link { margin-top: 20px; }
.serum-guide { border-top: 1px solid var(--hair); }
.comparison-table { overflow-x: auto; }
.comparison-table table { width: 100%; min-width: 680px; border-collapse: collapse; background: var(--surface-strong); }
.comparison-table th, .comparison-table td { padding: 22px; border-bottom: 1px solid var(--hair); text-align: left; vertical-align: top; }
.comparison-table thead th { background: var(--ink); color: #fff; }
.comparison-table tbody th { width: 20%; color: var(--signal-dark); }

/* Routine */
.start-protocol { max-width: none; padding-inline: max(var(--pad), calc((100vw - var(--max)) / 2 + var(--pad))); }
.support-note { padding-top: 20px; border-top: 1px solid color-mix(in srgb, var(--signal) 20%, transparent); font-size: 14px; }
.starter-product-links { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid color-mix(in srgb, var(--signal) 20%, transparent); }
.starter-product-links a { min-width: 0; display: flex; align-items: end; justify-content: center; gap: 20px; padding: 28px 20px; color: var(--ink); text-decoration: none; }
.starter-product-links a + a { border-left: 1px solid color-mix(in srgb, var(--signal) 20%, transparent); }
.starter-product-links img { width: auto; height: 190px; max-width: 45%; }
.starter-product-links img:is([src$=".png"], [src$=".jpg"]) { width: 42%; height: 190px; object-fit: contain; }
.starter-product-links span { display: grid; gap: 3px; }
.starter-product-links strong { font-family: var(--f-serif); font-size: 22px; }
.starter-product-links small { color: var(--graphite); }
.routine-rows { border-top: 1px solid var(--hair); list-style: none; }
.routine-rows > li { min-height: 180px; display: grid; grid-template-columns: 90px 1fr minmax(150px, auto); gap: 32px; align-items: center; padding: 28px 0; border-bottom: 1px solid var(--hair); }
.step-number { color: var(--signal); font-size: 16px; font-weight: 700; }
.routine-rows h3 { margin: 5px 0 8px; font-family: var(--f-serif); font-size: 30px; font-weight: 500; }
.routine-rows p { max-width: 58ch; color: var(--graphite); }
.routine-rows > li > a { color: var(--signal-dark); font-weight: 600; }
.inline-links { display: flex; gap: 18px; margin-top: 14px; }
.inline-links a { color: var(--signal-dark); font-weight: 600; }
.am-pm { background: var(--ink); color: #fff; }
.am-pm .section-label { color: #C9D3CE; }
.daypart { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid rgba(255,255,255,.25); }
.daypart section { padding: 26px 28px 26px 0; }
.daypart section + section { padding-left: 28px; border-left: 1px solid rgba(255,255,255,.25); }
.daypart h3 { margin-bottom: 16px; font-size: 22px; }
.daypart ol { padding-left: 20px; color: #D7DEDA; }
.daypart li { padding: 5px 0; }

/* Launch list */
.launch-form-section { max-width: none; padding-inline: max(var(--pad), calc((100vw - var(--max)) / 2 + var(--pad))); }
.launch-form-section ul { margin: 26px 0 0 20px; color: var(--graphite); }
.launch-form-section li { margin: 9px 0; }
.launch-form-section form { max-width: 620px; }
.launch-form-section label { display: block; margin-bottom: 9px; font-weight: 600; }
.field-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; }
.field-row input { min-width: 0; min-height: 50px; padding: 12px 15px; border: 1px solid var(--graphite); border-right: 0; background: var(--surface-strong); color: var(--ink); font: inherit; }
.field-row input::placeholder { color: #6C6558; opacity: 1; }
.form-help, .form-status { margin-top: 13px; color: var(--graphite); font-size: 13px; }
.form-help a { color: var(--signal-dark); }
.form-status { min-height: 1.5em; font-weight: 600; }

/* Science page */
.science-principles,
.commitment-section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(76px, 9vw, 130px) var(--pad);
}
.principle-rows { border-top: 1px solid var(--hair); }
.principle-rows article {
  display: grid;
  grid-template-columns: minmax(220px, .7fr) 1fr;
  gap: clamp(40px, 7vw, 100px);
  padding: 34px 0;
  border-bottom: 1px solid var(--hair);
}
.principle-rows h3 { font-family: var(--f-sans); font-size: clamp(24px, 3vw, 34px); font-weight: 500; letter-spacing: -.02em; }
.principle-rows p { max-width: 58ch; color: var(--graphite); font-size: 17px; }
.science-explainer,
.science-cta {
  padding: clamp(76px, 9vw, 130px) max(var(--pad), calc((100vw - var(--max)) / 2 + var(--pad)));
  display: grid;
  grid-template-columns: .85fr 1fr;
  gap: clamp(50px, 8vw, 120px);
  background: var(--surface-sage);
}
.science-explainer h2,
.science-cta h2 { font-family: var(--f-sans); font-size: clamp(34px, 4.5vw, 58px); font-weight: 500; line-height: 1.04; letter-spacing: -.03em; }
.science-explainer > div:last-child { max-width: 58ch; }
.science-explainer > div:last-child p { margin-bottom: 20px; color: var(--graphite); font-size: 18px; }
.commitment-list { border-top: 1px solid var(--hair); }
.commitment-list > div { display: grid; grid-template-columns: minmax(140px, .35fr) 1fr; gap: 30px; padding: 24px 0; border-bottom: 1px solid var(--hair); }
.commitment-list dt { color: var(--signal-dark); font-weight: 700; }
.commitment-list dd { max-width: 60ch; color: var(--graphite); }
.science-cta { align-items: center; background: var(--paper-pressed); }
.science-cta > p { max-width: 42ch; color: var(--graphite); }
.science-cta .button { justify-self: start; }

/* Existing detail and science pages */
.page-head { background: var(--surface); }
.page-head .eyebrow,
.product-section .eyebrow {
  color: var(--signal-dark);
  font-family: var(--f-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
}
.page-head h1 { max-width: 12ch; font-family: var(--f-sans); font-weight: 500; letter-spacing: -.035em; }
.product-hero { padding-top: 132px; }
.product-visual { min-height: 640px; background: var(--paper-deep); }
.product-render { width: auto; height: min(70vh, 470px); max-width: 72%; object-fit: contain; position: relative; z-index: 2; }
.product-render:is([src$=".png"], [src$=".jpg"]) { width: 100%; height: clamp(420px, 55vw, 640px); max-width: 100%; object-fit: contain; }
.product-rens { --product-accent: #9AA48E; }
.product-tonik { --product-accent: #8FA6B4; }
.product-kol { --product-accent: #C49098; }
.product-rav-perle { --product-accent: #C4A878; }
.product-tidlos-hud { --product-accent: #A89CB8; }
.product-eternus { --product-accent: #8C806B; }
.product-glod { --product-accent: #A88C35; }
.product-serum-3 { --product-accent: #B98D88; }
.product-page .product-visual { border-color: var(--product-accent); }
.product-page .product-info .tags span { border-color: var(--product-accent); background: color-mix(in srgb, var(--product-accent) 12%, transparent); }
.product-info .breadcrumb { color: var(--graphite); font-family: var(--f-sans); font-size: 13px; letter-spacing: 0; text-transform: none; }
.product-info .breadcrumb a { color: var(--signal-dark); }
.product-info .tags span { color: var(--graphite); font-family: var(--f-sans); font-size: 12px; letter-spacing: 0; text-transform: none; }
.product-info .cta { background: var(--signal); border-color: var(--signal); color: #fff; font-family: var(--f-sans); font-size: 14px; font-weight: 600; letter-spacing: 0; text-transform: none; }
.product-info .cta:hover { background: var(--signal-dark); border-color: var(--signal-dark); color: #fff; transform: translateX(4px); }
.product-info .cta-secondary { background: transparent; border-color: color-mix(in srgb, var(--product-accent) 55%, var(--hair)); color: var(--ink); }
.product-info .cta-secondary:hover { background: color-mix(in srgb, var(--product-accent) 14%, var(--paper)); border-color: var(--product-accent); color: var(--ink); }
.product-section { background: var(--surface); }
.product-section[style*="paper-2"] { background: var(--surface-sage) !important; }
.product-section .head h2 { font-family: var(--f-sans); font-weight: 500; letter-spacing: -.025em; }
.product-section .body > .content { color: var(--graphite); }
.product-section .body > .content-wide { max-width: none; }
.ingredient-note { margin-top: 36px; color: var(--graphite); font-size: 14px; }
.skincare-card[style*="border-top"] { border-top: 1px solid var(--hair) !important; }

/* Footer */
footer { max-width: none; margin-top: 0; padding: clamp(64px, 8vw, 100px) max(var(--pad), calc((100vw - var(--max)) / 2 + var(--pad))) 30px; background: var(--surface-strong); }
.footer-lead { display: grid; grid-template-columns: .7fr 1fr auto; gap: 40px; align-items: start; padding-bottom: 54px; margin-bottom: 54px; border-bottom: 1px solid var(--hair); }
.footer-brand { color: var(--ink); font-family: var(--f-serif); font-size: 25px; font-weight: 500; text-decoration: none; }
.footer-lead p { max-width: 52ch; color: var(--graphite); }
.foot-grid { grid-template-columns: 1fr 1fr 1fr; }
.foot-col h2 { margin-bottom: 18px; color: var(--ink); font-family: var(--f-sans); font-size: 14px; font-weight: 700; letter-spacing: 0; text-transform: none; }
.foot-col li { color: var(--graphite); font-size: 14px; }
.foot-col a { color: var(--graphite); font-size: 14px; }
.foot-col a:hover { color: var(--signal-dark); text-decoration: underline; text-underline-offset: 4px; }
.foot-bottom { color: var(--graphite); font-family: var(--f-sans); font-size: 12px; letter-spacing: 0; text-transform: none; }

/* Remove hidden-by-default motion from the original concept. */
.reveal,
.home-hero .top-meta,
.home-hero .ghost-55,
.home-hero .lockup .brandsvg,
.home-hero .lockup .tagline,
.home-hero .lockup .northern,
.home-hero .foot { opacity: 1; transform: none; animation: none; }

@media (max-width: 1080px) {
  .brand-hero { grid-template-columns: 1fr .72fr; gap: 50px; }
  .catalog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .catalog-toolbar { align-items: start; flex-direction: column; }
}

@media (max-width: 900px) {
  :root { --nav-height: 68px; }
  .nav { grid-template-columns: 1fr auto; padding: 0 var(--pad); }
  .nav .brand img { height: 42px; }
  .nav-toggle { display: none; justify-self: end; }
  .js .nav-toggle { display: block; }
  .nav-cta { display: none; }
  .nav .links {
    grid-column: 1 / -1;
    width: 100%;
    padding: 12px 0 18px;
    display: flex;
    flex-wrap: wrap;
    gap: 0 20px;
  }
  .js .nav .links {
    position: fixed;
    inset: var(--nav-height) 0 auto;
    min-height: calc(100vh - var(--nav-height));
    padding: 28px var(--pad) max(36px, env(safe-area-inset-bottom));
    display: none;
    flex-direction: column;
    gap: 0;
    background: var(--surface);
    border-top: 1px solid var(--hair);
  }
  .js .menu-open .nav .links { display: flex; }
  .nav .links a { min-height: 64px; border-bottom: 1px solid var(--hair); font-size: 22px; }
  .nav .links a::after { display: none; }
  html:not(.js) .nav { position: static; }
  html:not(.js) .nav .links a { min-height: 44px; border-bottom: 0; font-size: 15px; }
  .brand-hero,
  .page-intro,
  .starter-band,
  .start-protocol,
  .launch-form-section,
  .science-band,
  .science-explainer,
  .science-cta,
  .launch-band,
  .am-pm { grid-template-columns: 1fr; }
  .brand-hero { min-height: auto; padding-top: 125px; }
  .starter-visual { grid-template-columns: .75fr 1fr; grid-template-rows: auto; align-items: center; }
  .page-intro { align-items: start; }
  .routine-rows > li { grid-template-columns: 60px 1fr; }
  .routine-rows > li > a { grid-column: 2; justify-self: start; }
  .footer-lead { grid-template-columns: 1fr 1fr; }
  .footer-lead .text-link { grid-column: 2; }
  .product-hero { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .hero-copy h1,
  .page-intro h1 { font-size: clamp(42px, 12vw, 62px); }
  .starter-visual { grid-template-columns: 1fr; }
  .decision-list a { grid-template-columns: 1fr auto; gap: 8px 20px; }
  .decision-list a > span:first-child { grid-column: 1 / -1; }
  .routine-track li { grid-template-columns: 64px 1fr; }
  .routine-track a { align-items: start; flex-direction: column; gap: 4px; }
  .catalog-grid { grid-template-columns: 1fr; }
  .catalog-item { grid-template-columns: .65fr 1fr; grid-template-rows: minmax(330px, auto); }
  .catalog-copy { padding: 25px; }
  .catalog-image { padding: 22px; }
  .catalog-image img { height: 230px; }
  .starter-product-links { grid-template-columns: 1fr; }
  .starter-product-links a + a { border-left: 0; border-top: 1px solid color-mix(in srgb, var(--signal) 20%, transparent); }
  .daypart { grid-template-columns: 1fr; }
  .daypart section + section { padding-left: 0; border-left: 0; border-top: 1px solid rgba(255,255,255,.25); }
  .footer-lead, .foot-grid { grid-template-columns: 1fr; }
  .footer-lead .text-link { grid-column: auto; }
}

@media (max-width: 520px) {
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-actions .button { width: 100%; }
  .product-actions { align-items: stretch; flex-direction: column; }
  .product-actions .cta { justify-content: center; width: 100%; }
  .proof-list { display: grid; grid-template-columns: 1fr 1fr; }
  .catalog-item { grid-template-columns: 1fr; grid-template-rows: 260px auto; }
  .catalog-image img { height: 205px; }
  .routine-rows > li { grid-template-columns: 40px 1fr; gap: 14px; }
  .field-row { grid-template-columns: 1fr; gap: 10px; }
  .field-row input { border-right: 1px solid var(--graphite); }
  .footer-lead { gap: 22px; }
  .principle-rows article,
  .commitment-list > div { grid-template-columns: 1fr; gap: 12px; }
}

@media (pointer: coarse) {
  .text-link,
  .foot-col a { min-height: 44px; display: inline-flex; align-items: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (forced-colors: active) {
  .button,
  .filter-group button[aria-pressed="true"] { border: 2px solid ButtonText; }
  .proof-list li::before { color: currentColor; }
}

/* =================================================================
   PRODUCT EVIDENCE SYSTEM
   Performance, literature, development, responsibility
   ================================================================= */

.evidence-product-hero { padding-bottom: clamp(64px, 8vw, 104px); }
.evidence-product-hero .product-info { justify-content: center; }
.evidence-product-hero .product-info h1 { max-width: 10ch; }
.evidence-product-hero .product-info .pet {
  margin-top: -14px;
  color: var(--ink);
  font-family: var(--f-sans);
  font-size: clamp(22px, 2vw, 28px);
  font-style: normal;
  font-weight: 500;
}
.evidence-product-hero .product-info .lede { max-width: 56ch; }

.product-subnav {
  position: sticky;
  top: var(--nav-height);
  z-index: 35;
  max-width: var(--max);
  margin: 0 auto;
  padding-inline: var(--pad);
  display: flex;
  gap: clamp(20px, 3.4vw, 46px);
  overflow-x: auto;
  background: color-mix(in srgb, var(--surface) 96%, transparent);
  border-block: 1px solid var(--hair);
  scrollbar-width: thin;
  backdrop-filter: blur(10px);
}
.product-subnav a {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  color: var(--graphite);
  font-size: .8125rem;
  font-weight: 600;
  text-decoration: none;
}
.product-subnav a:hover { color: var(--signal-dark); }

.evidence-section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(76px, 8.5vw, 124px) var(--pad);
  border-top: 1px solid var(--hair);
}
.evidence-heading {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(320px, .65fr);
  gap: clamp(42px, 8vw, 120px);
  align-items: end;
  margin-bottom: clamp(38px, 5vw, 68px);
}
.evidence-heading h2,
.development-section h2,
.responsibility-section h2,
.product-next h2 {
  max-width: 16ch;
  font-family: var(--f-sans);
  font-size: clamp(2.25rem, 4.2vw, 3.75rem);
  font-weight: 500;
  line-height: 1.04;
  letter-spacing: -.035em;
}
.evidence-heading > p {
  max-width: 55ch;
  color: var(--graphite);
  font-size: 1.0625rem;
}

.formula-section { border-top: 0; }
.architecture-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--hair);
  border-left: 1px solid var(--hair);
}
.architecture-list article {
  min-height: 190px;
  padding: clamp(24px, 3vw, 38px);
  border-right: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
  background: var(--surface-strong);
}
.architecture-list h3,
.validation-grid h3,
.use-steps h3 {
  margin-bottom: 12px;
  font-family: var(--f-sans);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.25;
}
.architecture-list p,
.validation-grid p,
.use-steps p { color: var(--graphite); }

.performance-section {
  max-width: none;
  padding-inline: max(var(--pad), calc((100vw - var(--max)) / 2 + var(--pad)));
  background: var(--surface-sage);
}
.proof-layout { display: grid; grid-template-columns: 1.3fr .7fr; gap: 16px; }
.rens-evidence-chart-grid { margin-top: clamp(18px, 2.4vw, 30px); }
.proof-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.proof-card {
  min-width: 0;
  min-height: 280px;
  padding: clamp(22px, 3vw, 34px);
  display: flex;
  flex-direction: column;
  border: 1px solid color-mix(in srgb, var(--signal) 23%, transparent);
  background: var(--surface-strong);
}
.proof-card > span,
.validation-grid article > span {
  color: var(--signal-dark);
  font-size: .8125rem;
  font-weight: 700;
}
.proof-card strong {
  margin: auto 0 20px;
  color: var(--signal-dark);
  font-family: var(--f-serif);
  font-size: clamp(2.4rem, 4vw, 4.25rem);
  font-weight: 400;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.proof-card p { color: var(--graphite); font-size: .9375rem; }
.ph-chart {
  min-width: 0;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid color-mix(in srgb, var(--signal) 23%, transparent);
  background: var(--surface-strong);
}
.ph-chart figcaption { display: grid; gap: 4px; margin-bottom: 22px; }
.ph-chart figcaption strong { font-size: 1rem; }
.ph-chart figcaption span { color: var(--graphite); font-size: .8125rem; }
.ph-chart svg { width: 100%; height: auto; overflow: visible; }
.ph-chart svg line { stroke: #777064; stroke-width: 1; }
.ph-chart svg rect { fill: color-mix(in srgb, var(--signal) 22%, transparent); }
.ph-chart svg .chart-mid { stroke: var(--signal); stroke-width: 3; }
.ph-chart svg text { fill: var(--graphite); font-family: var(--f-sans); font-size: 12px; }
.evidence-disclaimer {
  max-width: 92ch;
  margin-top: 20px;
  color: var(--graphite);
  font-size: .8125rem;
}

/* Evidence chart components */
.screening-boundary {
  margin: 0 0 clamp(28px, 4vw, 48px);
  padding: 20px 22px;
  display: grid;
  grid-template-columns: minmax(120px, .25fr) 1fr;
  gap: 24px;
  align-items: baseline;
  background: color-mix(in srgb, #F6F0DF 72%, transparent);
  border: 1px solid color-mix(in srgb, #17120E 14%, transparent);
  border-radius: 12px;
}
.screening-boundary strong { color: #17120E; font-size: .875rem; }
.screening-boundary p { max-width: 82ch; color: #554B42; font-size: .9375rem; }

.evidence-chart-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 26px);
}
.evidence-chart-card {
  min-width: 0;
  padding: clamp(24px, 3.2vw, 40px);
  display: flex;
  flex-direction: column;
  background: #F6F0DF;
  border: 1px solid #D2C6AE;
  border-radius: 14px;
  color: #17120E;
}
.evidence-chart-card--radar { grid-column: span 5; }
.evidence-chart-card--line { grid-column: span 7; }
.evidence-chart-card--scatter { grid-column: 1 / -1; }
.evidence-chart-card__header {
  min-height: 104px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: start;
}
.evidence-chart-card__header p {
  margin-bottom: 7px;
  color: #6F655B;
  font-size: .8125rem;
  font-weight: 600;
}
.evidence-chart-card__header h3 {
  max-width: 22ch;
  color: #17120E;
  font-family: var(--f-serif);
  font-size: clamp(1.45rem, 2.3vw, 2rem);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -.02em;
  text-wrap: balance;
}
.evidence-chart-metric { min-width: 106px; text-align: right; }
.evidence-chart-metric strong {
  display: block;
  color: #17120E;
  font-family: var(--f-serif);
  font-size: clamp(1.4rem, 2.2vw, 2rem);
  font-weight: 400;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.evidence-chart-metric span { display: block; margin-top: 8px; color: #6F655B; font-size: .75rem; }
.evidence-chart__canvas {
  min-height: 320px;
  margin: 12px 0 20px;
  display: grid;
  place-items: center;
}
.evidence-chart-card--scatter .evidence-chart__canvas { min-height: 380px; }
.evidence-chart__canvas:empty::before {
  content: 'Recorded data available below';
  color: #6F655B;
  font-size: .875rem;
}
.evidence-chart__canvas svg { width: 100%; height: auto; overflow: visible; }
.evidence-chart__canvas .chart-grid {
  fill: none;
  stroke: #D3C8B2;
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}
.evidence-chart__canvas .radar-grid { fill: color-mix(in srgb, #EFE7D2 22%, transparent); }
.evidence-chart__canvas .chart-axis {
  stroke: #8B8176;
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}
.evidence-chart__canvas .chart-series {
  fill: none;
  stroke-width: 2.25;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}
.evidence-chart__canvas .chart-series.is-dashed { stroke-dasharray: 6 5; }
.evidence-chart__canvas .radar-area { fill-opacity: .2; stroke-width: 2; vector-effect: non-scaling-stroke; }
.evidence-chart__canvas .chart-marker { vector-effect: non-scaling-stroke; }
.evidence-chart__canvas text { font-family: var(--f-sans); }
.evidence-chart__canvas .chart-axis-label { fill: #4F463E; font-size: 13px; font-weight: 500; }
.evidence-chart__canvas .chart-axis-title { fill: #4F463E; font-size: 12px; font-weight: 600; }
.evidence-chart__canvas .chart-tick { fill: #6F655B; font-size: 11px; font-variant-numeric: tabular-nums; }
.evidence-chart__canvas .chart-meta { fill: #776D64; font-size: 10px; }
.evidence-chart__canvas .chart-value { fill: #17120E; font-size: 11px; font-weight: 600; font-variant-numeric: tabular-nums; }
.evidence-chart__canvas .chart-direct-label { font-size: 12px; font-weight: 600; }
.evidence-chart-reading {
  min-height: 78px;
  padding-top: 18px;
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 18px;
  border-top: 1px solid #D8CDB7;
}
.evidence-chart-reading strong { color: #17120E; font-size: .8125rem; }
.evidence-chart-reading p { color: #5E544B; font-size: .875rem; }
.chart-data-details { margin-top: 16px; border-top: 1px solid #D8CDB7; }
.chart-data-details summary {
  min-height: 48px;
  display: flex;
  align-items: center;
  color: #4F463E;
  font-size: .8125rem;
  font-weight: 600;
  cursor: pointer;
}
.chart-data-details table {
  width: 100%;
  margin-bottom: 18px;
  border-collapse: collapse;
  color: #4F463E;
  font-size: .75rem;
  font-variant-numeric: tabular-nums;
}
.chart-data-details th,
.chart-data-details td { padding: 8px 10px 8px 0; text-align: left; border-bottom: 1px solid #DDD2BD; }
.chart-data-details th { color: #17120E; font-weight: 600; }
.evidence-chart-caption {
  margin-top: auto;
  padding-top: 18px;
  color: #6F655B;
  font-size: .75rem;
  line-height: 1.55;
}
.has-chart-error .evidence-chart__canvas::before { content: 'Chart unavailable. Recorded values remain available below.'; }

.validation-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid color-mix(in srgb, var(--signal) 24%, transparent); }
.validation-grid article { min-height: 210px; padding: 30px 30px 30px 0; }
.validation-grid article + article { padding-left: 30px; border-left: 1px solid color-mix(in srgb, var(--signal) 24%, transparent); }
.validation-grid h3 { margin-top: 34px; text-transform: none; }

.ingredient-section { background: var(--surface-strong); }
.evidence-disclosures { border-top: 1px solid var(--hair); }
.evidence-detail { border-bottom: 1px solid var(--hair); }
.evidence-detail summary {
  min-height: 86px;
  padding: 18px 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
  cursor: pointer;
  list-style: none;
}
.evidence-detail summary::-webkit-details-marker { display: none; }
.evidence-detail summary > span:first-child { display: grid; grid-template-columns: minmax(220px, .65fr) 1fr; gap: 36px; align-items: baseline; flex: 1; }
.evidence-detail summary strong { color: var(--ink); font-size: 1.0625rem; }
.evidence-detail summary small { color: var(--signal-dark); font-size: .875rem; }
.evidence-detail summary > span:last-child { color: var(--signal); font-size: 1.5rem; transition: transform .22s ease-out; }
.evidence-detail[open] summary > span:last-child { transform: rotate(45deg); }
.evidence-detail > div { padding: 0 4px 26px max(256px, calc(65% + 18px)); }
.evidence-detail > div p { max-width: 58ch; color: var(--graphite); }

.development-section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(82px, 9vw, 140px) var(--pad);
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(420px, 1fr);
  gap: clamp(58px, 9vw, 138px);
  align-items: center;
  border-top: 1px solid var(--hair);
}
.development-copy blockquote {
  max-width: 18ch;
  margin: 34px 0;
  color: var(--ink);
  font-family: var(--f-serif);
  font-size: clamp(1.75rem, 3vw, 2.8rem);
  font-style: italic;
  line-height: 1.24;
}
.development-copy > p:not(.section-label) { max-width: 62ch; margin-top: 18px; color: var(--graphite); }
.development-visual {
  min-height: 480px;
  padding: clamp(26px, 4vw, 48px);
  display: grid;
  grid-template-columns: .7fr 1fr;
  gap: 30px;
  align-items: center;
  background: var(--paper-deep);
  border: 1px solid var(--hair);
}
.development-visual img { width: auto; height: 330px; max-width: 100%; justify-self: center; }
.development-visual img:is([src$=".png"], [src$=".jpg"]) { width: 100%; object-fit: contain; }
.development-visual figcaption { min-height: 360px; padding: 24px; background: var(--surface-strong); border-top: 3px solid var(--signal); }
.development-visual figcaption > span { color: var(--signal-dark); font-size: .8125rem; font-weight: 700; }
.development-visual ul { margin: 28px 0 0; list-style: none; }
.development-visual li { padding: 11px 0; border-bottom: 1px solid var(--hair); color: var(--graphite); font-family: var(--f-serif); font-style: italic; }

.responsibility-section {
  max-width: var(--max);
  margin: 0 auto clamp(70px, 8vw, 110px);
  padding: clamp(40px, 5vw, 66px) var(--pad);
  display: grid;
  grid-template-columns: .65fr 1.35fr;
  gap: clamp(46px, 7vw, 100px);
  background: var(--paper-pressed);
  border: 1px solid var(--hair);
}
.responsibility-section h2 { font-size: clamp(2rem, 3.4vw, 3rem); }
.responsibility-section > div > p:last-child { max-width: 48ch; margin-top: 18px; color: var(--graphite); }
.responsibility-section dl { display: grid; grid-template-columns: 1fr 1fr; }
.responsibility-section dl > div { min-height: 116px; padding: 18px 24px; display: grid; grid-template-columns: 96px 1fr; gap: 14px; border-bottom: 1px solid color-mix(in srgb, var(--ink) 17%, transparent); }
.responsibility-section dl > div:nth-child(odd) { border-right: 1px solid color-mix(in srgb, var(--ink) 17%, transparent); }
.responsibility-section dt { color: var(--signal-dark); font-size: .75rem; font-weight: 700; }
.responsibility-section dd { color: var(--graphite); }

.use-section { border-top: 0; }
.use-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-bottom: clamp(74px, 8vw, 110px); border-top: 1px solid var(--hair); list-style: none; }
.use-steps li { min-height: 190px; padding: 30px 30px 30px 0; display: grid; grid-template-columns: 40px 1fr; gap: 18px; }
.use-steps li + li { padding-left: 30px; border-left: 1px solid var(--hair); }
.use-steps li > span { color: var(--signal); font-weight: 700; }
.faq-block { display: grid; grid-template-columns: .55fr 1fr; column-gap: clamp(48px, 8vw, 110px); border-top: 1px solid var(--hair); }
.faq-block > h2 { grid-row: 1 / span 5; padding-top: 26px; font-family: var(--f-sans); font-size: clamp(1.8rem, 3vw, 2.6rem); font-weight: 500; letter-spacing: -.025em; }
.faq-block details { grid-column: 2; border-bottom: 1px solid var(--hair); }
.faq-block summary { min-height: 66px; padding: 16px 0; display: flex; justify-content: space-between; align-items: center; gap: 20px; font-weight: 600; cursor: pointer; list-style: none; }
.faq-block summary::-webkit-details-marker { display: none; }
.faq-block summary span { color: var(--signal); font-size: 1.4rem; transition: transform .22s ease-out; }
.faq-block details[open] summary span { transform: rotate(45deg); }
.faq-block details p { max-width: 58ch; padding: 0 0 22px; color: var(--graphite); }

.product-next {
  padding: clamp(64px, 7vw, 96px) max(var(--pad), calc((100vw - var(--max)) / 2 + var(--pad)));
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 24px;
  align-items: end;
  background: var(--surface-sage);
}
.product-next h2 { max-width: 18ch; font-size: clamp(2rem, 3.6vw, 3.2rem); }
.product-next .text-link { align-self: center; }

@media (max-width: 1050px) {
  .proof-layout { grid-template-columns: 1fr; }
  .evidence-chart-card--radar,
  .evidence-chart-card--line,
  .evidence-chart-card--scatter { grid-column: 1 / -1; }
  .development-section { grid-template-columns: 1fr 1fr; gap: 48px; }
  .development-visual { grid-template-columns: 1fr; }
  .development-visual img { height: 230px; }
  .development-visual figcaption { min-height: auto; }
  .responsibility-section { grid-template-columns: 1fr; }
}

@media (max-width: 800px) {
  .product-subnav { top: var(--nav-height); }
  .evidence-heading { grid-template-columns: 1fr; gap: 22px; align-items: start; }
  .screening-boundary { grid-template-columns: 1fr; gap: 8px; }
  .evidence-chart-card__header { min-height: 0; }
  .evidence-chart-reading { grid-template-columns: 1fr; gap: 7px; }
  .architecture-list,
  .proof-grid,
  .validation-grid,
  .use-steps { grid-template-columns: 1fr; }
  .architecture-list article { min-height: auto; }
  .proof-card { min-height: 220px; }
  .validation-grid article { min-height: auto; padding: 26px 0; }
  .validation-grid article + article { padding-left: 0; border-left: 0; border-top: 1px solid color-mix(in srgb, var(--signal) 24%, transparent); }
  .evidence-detail summary > span:first-child { grid-template-columns: 1fr; gap: 5px; }
  .evidence-detail > div { padding-left: 0; }
  .development-section { grid-template-columns: 1fr; }
  .development-visual { grid-template-columns: .65fr 1fr; }
  .use-steps li { min-height: auto; padding: 24px 0; }
  .use-steps li + li { padding-left: 0; border-left: 0; border-top: 1px solid var(--hair); }
  .faq-block { grid-template-columns: 1fr; }
  .faq-block > h2 { grid-row: auto; padding: 26px 0; }
  .faq-block details { grid-column: 1; }
  .product-next { grid-template-columns: 1fr; align-items: start; }
  .product-next .button,
  .product-next .text-link { justify-self: start; }
}

@media (max-width: 560px) {
  .product-subnav { margin-inline: calc(-1 * var(--pad)); padding-inline: var(--pad); }
  .evidence-chart-card { padding: 22px 18px; border-radius: 12px; }
  .evidence-chart-card__header { grid-template-columns: 1fr; gap: 14px; }
  .evidence-chart-metric { min-width: 0; text-align: left; }
  .evidence-chart__canvas,
  .evidence-chart-card--scatter .evidence-chart__canvas { min-height: 250px; margin-inline: -8px; }
  .chart-data-details { overflow-x: auto; }
  .chart-data-details table { min-width: 520px; }
  .development-visual { min-height: 0; grid-template-columns: 1fr; }
  .development-visual img { height: 210px; }
  .responsibility-section { margin-inline: var(--pad); padding-inline: 24px; }
  .responsibility-section dl { grid-template-columns: 1fr; }
  .responsibility-section dl > div:nth-child(odd) { border-right: 0; }
}

@media (forced-colors: active) {
  .evidence-chart-card,
  .screening-boundary { border-color: CanvasText; }
  .evidence-chart__canvas .chart-grid,
  .evidence-chart__canvas .chart-axis,
  .evidence-chart__canvas .chart-series,
  .evidence-chart__canvas .radar-area,
  .evidence-chart__canvas .chart-marker { stroke: CanvasText; }
}