/* ============================================================
   FINER Score Index — shared brand stylesheet
   Brand system extracted from finer-landing/index.html
   (which mirrors ios/Finer/Utilities/Theme.swift)
   ============================================================ */

:root {
  --ink:        #212121;   /* FinerTheme.backgroundDark */
  --gold:       #D4AB31;   /* FinerTheme.gold */
  --gold-soft:  rgba(212, 171, 49, 0.35);
  --gold-dim:   rgba(212, 171, 49, 0.14);
  --beige:      #F2EDE6;   /* FinerTheme.warmBeige */
  --beige-deep: #EAE2D6;
  --paper:      #FFFFFF;
  --gray-50:    #F9FAFB;
  --gray-100:   #F3F4F6;
  --gray-200:   #E5E7EB;
  --gray-300:   #D1D5DB;
  --gray-400:   #9CA3AF;
  --gray-500:   #6B7280;

  /* grade scale — muted, editorial (never traffic-light neon) */
  --grade-a: #4A7C59;
  --grade-b: #7C9A5A;
  --grade-c: var(--gold);
  --grade-d: #C07A3A;
  --grade-e: #A94438;

  --serif:   "Playfair Display", "EB Garamond", Georgia, serif;
  --serif-2: "EB Garamond", Georgia, serif;
  --sans:    -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;

  --max-w: 1160px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--beige);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--gold); color: #fff; }

/* grain overlay — quiet texture over the beige */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='linear' slope='0.05'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.wrap { max-width: var(--max-w); margin: 0 auto; padding: 0 32px; }

/* ============ Shared type ============ */
.eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gray-500);
}
.eyebrow .tick { color: var(--gold); margin-right: 10px; }

h1.page-title, h2.section-title {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.08;
}
h2.section-title { font-size: clamp(30px, 4vw, 44px); margin-top: 16px; }
h1.page-title    { font-size: clamp(40px, 5.6vw, 68px); margin-top: 20px; }
h1.page-title em, h2.section-title em { font-style: italic; color: var(--gold); }

.lede {
  margin-top: 18px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--gray-500);
  max-width: 620px;
}
.lede a { color: var(--ink); }

/* ============ Buttons (capsules) ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 52px;
  padding: 0 30px;
  border-radius: 999px;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.35s ease, background 0.35s ease;
}
.btn-primary {
  background: #fff;
  color: var(--gold);
  box-shadow: inset 0 0 0 1.5px var(--gold), 0 4px 12px var(--gold-soft);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 0 0 1.5px var(--gold), 0 10px 28px var(--gold-soft);
}
.btn-primary .arrow { transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1); }
.btn-primary:hover .arrow { transform: translateX(4px); }

.btn-ghost {
  background: rgba(255, 255, 255, 0.6);
  color: var(--ink);
  font-weight: 500;
  box-shadow: inset 0 0 0 1px rgba(33, 33, 33, 0.12);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.9); }

.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(33,33,33,0.3); }

/* ============ Nav ============ */
header.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--beige) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(33, 33, 33, 0.07);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.wordmark {
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.55em;
  text-indent: 0.55em;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
}
.wordmark .site-sub {
  font-family: var(--serif-2);
  font-style: italic;
  font-weight: 400;
  font-size: 13px;
  letter-spacing: 0.02em;
  text-indent: 0;
  text-transform: none;
  color: var(--gray-400);
  margin-left: 4px;
}
.nav-links { display: flex; gap: 36px; align-items: center; }
.nav-links a {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--gray-500);
  text-decoration: none;
  transition: color 0.25s ease;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--ink); }
.nav-cta { height: 40px; padding: 0 22px; font-size: 13px; }
.nav-links a.nav-cta, .nav-links a.nav-cta:hover { color: var(--gold); font-weight: 700; }

/* ============ Footer ============ */
footer {
  border-top: 1px solid rgba(33, 33, 33, 0.1);
  padding: 44px 0 52px;
  margin-top: 110px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
}
.footer-inner .tagline {
  font-family: var(--serif-2);
  font-style: italic;
  font-size: 14px;
  color: var(--gray-400);
}
.footer-links { display: flex; gap: 28px; }
.footer-links a { font-size: 12.5px; color: var(--gray-500); text-decoration: none; }
.footer-links a:hover { color: var(--ink); }

/* ============ Reveal ============ */
.reveal { opacity: 0; transform: translateY(32px); transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.22, 1, 0.36, 1); }
.reveal.in { opacity: 1; transform: translateY(0); }
.rise { opacity: 0; transform: translateY(24px); animation: rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) forwards; }
.d1 { animation-delay: 0.05s; }
.d2 { animation-delay: 0.18s; }
.d3 { animation-delay: 0.32s; }
.d4 { animation-delay: 0.46s; }
@keyframes rise { to { opacity: 1; transform: translateY(0); } }

/* ============================================================
   Score components
   ============================================================ */

/* Grade badge — circular chip, Playfair letter */
.grade-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 17px;
  color: #fff;
  flex: none;
}
.grade-badge.g-A { background: var(--grade-a); }
.grade-badge.g-B { background: var(--grade-b); }
.grade-badge.g-C { background: var(--grade-c); }
.grade-badge.g-D { background: var(--grade-d); }
.grade-badge.g-E { background: var(--grade-e); }
.grade-badge.g-none {
  background: transparent;
  color: var(--gray-400);
  box-shadow: inset 0 0 0 1.5px var(--gray-300);
}
.grade-badge.lg { width: 76px; height: 76px; font-size: 40px; }

/* Provenance badges */
.prov {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
  cursor: default;
}
.prov.data {
  color: #8a6d15;
  box-shadow: inset 0 0 0 1px var(--gold-soft);
  background: var(--gold-dim);
}
.prov.assumed {
  color: var(--gray-500);
  box-shadow: inset 0 0 0 1px var(--gray-300);
  background: rgba(255, 255, 255, 0.55);
}

/* Completeness meter — 6 segments sized by factor weights */
.meter { display: flex; gap: 3px; align-items: center; }
.meter i {
  height: 6px;
  border-radius: 3px;
  background: var(--gray-200);
  display: block;
}
.meter i.on { background: var(--gold); }
.meter i.half { background: linear-gradient(90deg, var(--gold) 50%, var(--gray-200) 50%); }
/* widths ∝ completeness weights 40/15/25/10/5/5 */
.meter .w-fiber { width: 40px; }
.meter .w-mass { width: 15px; }
.meter .w-cdur { width: 25px; }
.meter .w-origin { width: 10px; }
.meter .w-transport { width: 5px; }
.meter .w-certs { width: 5px; }
.meter-label { font-size: 11px; color: var(--gray-500); margin-left: 8px; white-space: nowrap; }

/* ============================================================
   Browse page
   ============================================================ */
.browse-hero { padding: 64px 0 40px; }

/* control bar */
.controls {
  position: sticky;
  top: 68px;
  z-index: 40;
  background: color-mix(in srgb, var(--beige) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(33, 33, 33, 0.07);
  padding: 14px 0;
}
.controls-inner { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.search-box {
  flex: 1 1 220px;
  display: flex;
  align-items: center;
  gap: 10px;
  height: 42px;
  background: rgba(255, 255, 255, 0.75);
  border-radius: 999px;
  padding: 0 18px;
  box-shadow: inset 0 0 0 1px rgba(33, 33, 33, 0.1);
}
.search-box:focus-within { box-shadow: inset 0 0 0 1.5px var(--gold); }
.search-box input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--ink);
  min-width: 0;
}
.search-box input::placeholder { color: var(--gray-400); }
.search-box .si { color: var(--gray-400); font-size: 14px; }

.grade-pills { display: flex; gap: 6px; }
.grade-pill {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-500);
  background: rgba(255, 255, 255, 0.6);
  box-shadow: inset 0 0 0 1px rgba(33, 33, 33, 0.1);
  transition: all 0.25s ease;
}
.grade-pill:hover { color: var(--ink); }
.grade-pill.on { color: #fff; }
.grade-pill.on.g-A { background: var(--grade-a); box-shadow: none; }
.grade-pill.on.g-B { background: var(--grade-b); box-shadow: none; }
.grade-pill.on.g-C { background: var(--grade-c); box-shadow: none; }
.grade-pill.on.g-D { background: var(--grade-d); box-shadow: none; }
.grade-pill.on.g-E { background: var(--grade-e); box-shadow: none; }

.select-pill {
  height: 42px;
  border-radius: 999px;
  border: none;
  outline: none;
  background: rgba(255, 255, 255, 0.75);
  box-shadow: inset 0 0 0 1px rgba(33, 33, 33, 0.1);
  padding: 0 16px;
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink);
  cursor: pointer;
  max-width: 170px;
}
.select-pill:focus { box-shadow: inset 0 0 0 1.5px var(--gold); }

.toggle-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 18px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.6);
  box-shadow: inset 0 0 0 1px rgba(33, 33, 33, 0.1);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-500);
  transition: all 0.25s ease;
}
.toggle-pill.on { color: var(--ink); box-shadow: inset 0 0 0 1.5px var(--gold); background: #fff; }

/* results meta row */
.results-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 26px 0 6px;
  font-size: 13px;
  color: var(--gray-500);
}
.results-meta b { color: var(--ink); font-variant-numeric: tabular-nums; }
.results-meta .rm-note { font-family: var(--serif-2); font-style: italic; }

/* product grid */
.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  padding: 22px 0 10px;
}
.card {
  border-radius: 20px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--gray-200);
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.45s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 22px 48px rgba(33,33,33,0.12); }
.card-img {
  height: 240px;
  background: linear-gradient(165deg, #EDE6D8, #D9CFBE);
  position: relative;
  overflow: hidden;
}
.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.card-meta { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 7px; flex: 1; }
.card-brand {
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-400);
}
.card-title {
  font-family: var(--serif-2);
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-foot {
  margin-top: auto;
  padding-top: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.card-price { font-size: 13.5px; font-weight: 600; }
.card-score { display: flex; align-items: center; gap: 8px; }
.card-score .num {
  font-family: var(--serif-2);
  font-size: 13px;
  color: var(--gray-500);
  font-variant-numeric: tabular-nums;
}
.card-withheld {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-400);
  padding: 5px 10px;
  border-radius: 999px;
  box-shadow: inset 0 0 0 1px var(--gray-300);
}
.card-cbar { height: 3px; border-radius: 2px; background: var(--gray-100); overflow: hidden; }
.card-cbar i { display: block; height: 100%; background: var(--gold); border-radius: 2px; }

/* pagination */
.pager {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  padding: 44px 0 20px;
}
.pager .btn { height: 44px; padding: 0 24px; font-size: 13.5px; }
.pager .btn[disabled] { opacity: 0.35; pointer-events: none; }
.pager .page-label { font-size: 13px; color: var(--gray-500); font-variant-numeric: tabular-nums; }

/* skeleton / empty states */
.state-note {
  text-align: center;
  padding: 90px 0;
  font-family: var(--serif-2);
  font-style: italic;
  font-size: 17px;
  color: var(--gray-400);
  grid-column: 1 / -1;
}
.skel { pointer-events: none; }
.skel .card-img, .skel .sk-line {
  background: linear-gradient(100deg, var(--gray-100) 40%, #fff 50%, var(--gray-100) 60%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite linear;
}
.sk-line { height: 12px; border-radius: 6px; }
.sk-line.short { width: 55%; }
@keyframes shimmer { to { background-position: -200% 0; } }

/* ============================================================
   Product page
   ============================================================ */
.product-hero { padding: 54px 0 20px; }
.product-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 54px;
  align-items: start;
}
.product-photo {
  border-radius: 24px;
  overflow: hidden;
  background: linear-gradient(165deg, #EDE6D8, #D9CFBE);
  border: 1px solid var(--gray-200);
  aspect-ratio: 4 / 5;
  position: sticky;
  top: 96px;
}
.product-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }

.product-head .p-brand {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--gray-500);
}
.product-head h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(28px, 3.6vw, 42px);
  line-height: 1.12;
  margin: 12px 0 14px;
  letter-spacing: -0.01em;
}
.p-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 4px; }
.chip {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-500);
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.65);
  box-shadow: inset 0 0 0 1px rgba(33, 33, 33, 0.08);
}
.p-price { font-family: var(--serif-2); font-size: 22px; font-weight: 600; margin: 10px 0 4px; }
.p-retail {
  display: inline-block;
  margin-top: 6px;
  font-size: 13.5px;
  color: var(--gray-500);
  text-decoration: none;
  border-bottom: 1px solid var(--gray-300);
  padding-bottom: 1px;
  transition: color 0.25s ease, border-color 0.25s ease;
}
.p-retail:hover { color: var(--ink); border-color: var(--ink); }

/* official score block */
.score-block {
  margin-top: 28px;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 22px;
  padding: 26px 28px;
  display: flex;
  gap: 22px;
  align-items: center;
  flex-wrap: wrap;
}
.score-block .sb-num {
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 500;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.score-block .sb-num i { font-style: normal; font-size: 17px; color: var(--gray-400); }
.score-block .sb-side { display: flex; flex-direction: column; gap: 8px; }
.sb-version {
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-400);
}
.sb-official {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #8a6d15;
}

/* ============ Equation ============ */
.equation-section { padding: 70px 0 10px; }
.eq-ledger {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 24px;
  padding: 40px 42px 34px;
  margin-top: 40px;
  overflow-x: auto;
}
.eq-line {
  font-family: var(--serif-2);
  font-size: clamp(19px, 2.6vw, 27px);
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
  padding-bottom: 8px;
}
.eq-line .op { color: var(--gray-400); }
.eq-line.values { margin-top: 14px; color: var(--gray-500); font-variant-numeric: tabular-nums; }
.eq-line.values .eq-result { color: var(--ink); font-weight: 600; }
.eq-term {
  font-style: italic;
  border: none;
  background: transparent;
  font-family: var(--serif-2);
  font-size: inherit;
  cursor: pointer;
  color: var(--ink);
  padding: 4px 12px;
  border-radius: 999px;
  box-shadow: inset 0 0 0 1px var(--gray-200);
  transition: all 0.3s ease;
  position: relative;
}
.eq-term sub { font-size: 0.55em; font-style: normal; letter-spacing: 0.04em; }
.eq-term:hover { box-shadow: inset 0 0 0 1.5px var(--gold-soft); }
.eq-term.open { box-shadow: inset 0 0 0 1.5px var(--gold); background: var(--gold-dim); }
.eq-norm {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px dashed var(--gray-200);
  font-family: var(--serif-2);
  font-size: 15px;
  color: var(--gray-500);
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}
.eq-norm .final {
  font-family: var(--serif);
  font-size: 26px;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.eq-norm .final em { font-style: italic; color: var(--gold); }

/* term detail accordion */
.term-detail {
  display: none;
  margin-top: 26px;
  border-top: 1px solid var(--gray-100);
  padding-top: 26px;
  animation: rise 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.term-detail.open { display: block; }
.term-detail h4 {
  font-family: var(--serif-2);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 6px;
}
.term-detail .td-sub {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--gray-500);
  max-width: 640px;
  margin-bottom: 18px;
}
.term-detail .td-eq {
  font-family: var(--serif-2);
  font-size: 16px;
  color: var(--gray-500);
  background: var(--gray-50);
  border-radius: 12px;
  padding: 12px 18px;
  margin: 14px 0;
  overflow-x: auto;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.term-detail .td-eq b { color: var(--ink); font-weight: 600; }

/* data tables inside details + methodology */
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
table.data th {
  text-align: left;
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-400);
  padding: 8px 12px 8px 0;
  border-bottom: 1px solid var(--gray-200);
}
table.data td {
  padding: 9px 12px 9px 0;
  border-bottom: 1px solid var(--gray-100);
  vertical-align: middle;
  font-variant-numeric: tabular-nums;
}
table.data td.num, table.data th.num { text-align: right; padding-right: 0; }
table.data tr:last-child td { border-bottom: none; }
table.data .fiber-name { font-family: var(--serif-2); font-size: 15px; font-weight: 600; text-transform: capitalize; }
.mini-tag {
  display: inline-block;
  font-size: 8.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #8a6d15;
  background: var(--gold-dim);
  border-radius: 999px;
  padding: 3px 8px;
  margin-left: 6px;
}

.warn-note {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--gray-500);
  background: var(--gray-50);
  border-left: 2px solid var(--gold);
  padding: 12px 16px;
  border-radius: 0 10px 10px 0;
  max-width: 640px;
}

/* ============ What-if panel ============ */
.whatif-section { padding: 64px 0 10px; }
.whatif {
  margin-top: 38px;
  border: 1.5px dashed var(--gold-soft);
  background: var(--beige-deep);
  border-radius: 24px;
  padding: 40px 42px;
  position: relative;
  overflow: hidden;
}
.whatif::before {
  content: "hypothetical";
  position: absolute;
  right: -22px;
  top: 30px;
  transform: rotate(24deg);
  font-family: var(--serif);
  font-style: italic;
  font-size: 15px;
  color: rgba(33, 33, 33, 0.13);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  pointer-events: none;
}
.whatif-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #8a6d15;
  margin-bottom: 18px;
}
.whatif-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 44px;
  align-items: start;
}
.wi-group { margin-bottom: 22px; }
.wi-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 10px;
}
.seg { display: inline-flex; flex-wrap: wrap; gap: 6px; }
.seg button {
  border: none;
  cursor: pointer;
  height: 36px;
  padding: 0 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: inset 0 0 0 1px rgba(33, 33, 33, 0.1);
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--gray-500);
  transition: all 0.25s ease;
}
.seg button:hover { color: var(--ink); }
.seg button.on { background: var(--ink); color: #fff; box-shadow: none; }

.wi-fiber-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 8px 0;
  border-bottom: 1px solid rgba(33, 33, 33, 0.07);
}
.wi-fiber-row:last-child { border-bottom: none; }
.wi-fiber-row .fname { font-family: var(--serif-2); font-size: 15px; font-weight: 600; text-transform: capitalize; min-width: 110px; }
.wi-fiber-row .fpct { font-size: 12px; color: var(--gray-500); min-width: 40px; font-variant-numeric: tabular-nums; }
.wi-check {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-500);
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: inset 0 0 0 1px rgba(33, 33, 33, 0.1);
  transition: all 0.25s ease;
  user-select: none;
}
.wi-check input { display: none; }
.wi-check.on { background: var(--ink); color: #fff; box-shadow: none; }

/* what-if readout */
.wi-readout {
  background: rgba(255, 255, 255, 0.75);
  border-radius: 20px;
  padding: 30px 32px;
  text-align: center;
  position: sticky;
  top: 96px;
}
.wi-readout .wi-score {
  font-family: var(--serif);
  font-style: italic;
  font-size: 62px;
  font-weight: 500;
  line-height: 1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.wi-readout .wi-grade { margin: 12px 0 4px; }
.wi-delta {
  font-family: var(--serif-2);
  font-size: 15px;
  margin-top: 10px;
  color: var(--gray-500);
  font-variant-numeric: tabular-nums;
}
.wi-delta.better { color: var(--grade-a); }
.wi-delta.worse { color: var(--grade-e); }
.wi-official-note {
  font-size: 11px;
  color: var(--gray-400);
  margin-top: 14px;
  line-height: 1.5;
}
.wi-reset {
  margin-top: 18px;
  height: 40px;
  padding: 0 22px;
  font-size: 12.5px;
}

/* ============ Provenance & dispute ============ */
.prov-section { padding: 64px 0 10px; }
.prov-table-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 22px;
  padding: 30px 34px;
  margin-top: 36px;
}
.dispute-cta {
  margin-top: 34px;
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}
.dispute-cta p {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--gray-500);
  max-width: 460px;
}

/* withheld state */
.withheld-card {
  margin-top: 40px;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 24px;
  padding: 54px 48px;
  text-align: center;
}
.withheld-card .wc-mark {
  font-family: var(--serif);
  font-style: italic;
  font-size: 54px;
  color: var(--gray-300);
  line-height: 1;
}
.withheld-card h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 30px;
  margin: 18px 0 12px;
}
.withheld-card .reason {
  font-family: var(--serif-2);
  font-style: italic;
  font-size: 16px;
  color: var(--gray-500);
  max-width: 520px;
  margin: 0 auto 10px;
  line-height: 1.6;
}
.withheld-card p { font-size: 14px; color: var(--gray-500); max-width: 520px; margin: 0 auto 26px; line-height: 1.7; }

/* version drift banner */
.version-banner {
  margin-top: 30px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 14px;
  padding: 14px 20px;
  font-size: 13px;
  color: var(--gray-500);
}

/* ============================================================
   Methodology page
   ============================================================ */
.doc { max-width: 720px; margin: 0 auto; padding: 64px 32px 40px; }
.doc-head { text-align: left; margin-bottom: 60px; }
.doc h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 30px;
  letter-spacing: -0.01em;
  margin: 64px 0 18px;
}
.doc h2 em { font-style: italic; color: var(--gold); }
.doc h3 {
  font-family: var(--serif-2);
  font-size: 20px;
  font-weight: 600;
  margin: 34px 0 12px;
}
.doc p, .doc li {
  font-family: var(--serif-2);
  font-size: 17px;
  line-height: 1.75;
  color: rgba(33, 33, 33, 0.78);
}
.doc p { margin-bottom: 16px; }
.doc ul, .doc ol { padding-left: 24px; margin-bottom: 16px; }
.doc li { margin-bottom: 8px; }
.doc strong { color: var(--ink); }
.doc a { color: var(--ink); }
.doc .formula {
  font-family: var(--serif-2);
  font-size: 17px;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 14px;
  padding: 18px 24px;
  margin: 20px 0;
  overflow-x: auto;
  white-space: nowrap;
}
.doc table.data { background: #fff; border: 1px solid var(--gray-200); border-radius: 14px; border-collapse: separate; border-spacing: 0; overflow: hidden; margin: 20px 0; }
.doc table.data th { padding: 12px 16px; background: var(--gray-50); }
.doc table.data td { padding: 10px 16px; }
.doc .doc-note {
  font-family: var(--serif-2);
  font-style: italic;
  font-size: 14.5px;
  color: var(--gray-500);
  border-left: 2px solid var(--gold);
  padding-left: 16px;
  margin: 20px 0;
}
.doc-toc {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 22px 26px;
  margin: 34px 0 10px;
}
.doc-toc ol { margin: 0; padding-left: 20px; }
.doc-toc li { font-size: 14.5px; margin-bottom: 5px; }
.doc-toc a { text-decoration: none; color: var(--gray-500); }
.doc-toc a:hover { color: var(--ink); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 960px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: 1fr; gap: 36px; }
  .product-photo { position: static; max-width: 440px; }
  .whatif-grid { grid-template-columns: 1fr; }
  .wi-readout { position: static; }
  .nav-links { gap: 20px; }
  .eq-ledger, .whatif { padding: 28px 24px; }
  .controls { top: 67px; }
}
@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; }
  .wrap { padding: 0 20px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .score-block { padding: 22px; }
  .eq-line { font-size: 17px; }
  .doc { padding: 44px 20px 20px; }
}