:root {
  --paper: #f7f8fa;
  --paper-2: #ffffff;
  --ink: #2c3e50;
  --muted: #5f7184;
  --gold: #a68118;
  --gold-dark: #80650f;
  --gold-soft: #d1b76b;
  --line: #dce2e8;
  --line-2: #e8edf1;
  --serif: "Playfair Display", Georgia, "Times New Roman", serif;
  --sans: Lato, Arial, sans-serif;
  --shadow-sm: 0 8px 24px rgba(44, 62, 80, .08);
  --shadow: 0 20px 60px rgba(44, 62, 80, .12);
  --radius: .5rem;
  --radius-lg: .75rem;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img { max-width: 100%; height: auto; }
main { overflow: hidden; }

h1, h2, h3, h4, .brand, .logo {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.08;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(44, 62, 80, .02);
}

.site-header > nav.container {
  min-height: 72px;
}

.site-header .navbar { min-height: 72px; }
.site-header .navbar-brand { margin-right: 1.5rem; }
.site-header .nav-link { color: var(--ink); font-size: .88rem; white-space: nowrap; }
.site-header .nav-link:hover,
.site-header .nav-link:focus-visible,
.site-header .nav-link.active { color: var(--gold-dark); }
.nav-count { display: inline-flex; align-items: center; min-height: 1.25rem; margin-left: .2rem; padding: .05rem .38rem; border: 1px solid var(--gold-soft); border-radius: 999px; color: var(--gold-dark); font-size: .7rem; line-height: 1; }

.site-header:not(:has(> nav.container)) {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 72px;
  padding: 1rem clamp(1rem, 4vw, 4.5rem);
}

.brand,
.logo {
  color: var(--ink);
  font-size: 1.45rem;
  font-weight: 600;
  text-decoration: none;
}

.brand span,
.logo span { color: var(--gold); }

.site-header > .logo { margin-right: 2rem; }

.site-nav,
.site-header > nav:not(.container) {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.site-nav a,
.site-header > nav:not(.container) a {
  color: var(--ink);
  font-size: .88rem;
  text-decoration: none;
  transition: color .2s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-header > nav:not(.container) a:hover,
.site-header > nav:not(.container) a:focus-visible,
footer a:hover,
footer a:focus-visible { color: var(--gold-dark); }

.eyebrow {
  margin: 0 0 .7rem;
  color: var(--gold);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .12em;
  line-height: 1.5;
  text-transform: uppercase;
}

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

.hero h1 {
  max-width: 14ch;
  margin: 0 0 1.25rem;
  color: var(--ink);
  font-size: clamp(2.75rem, 5vw, 4.6rem);
  line-height: 1.04;
  overflow-wrap: normal;
}

.lede {
  max-width: 62ch;
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

.hero .row > [class*="col-"],
.feature-card > * { min-width: 0; }

.hero-image {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.btn-gold {
  background: var(--gold);
  border-color: var(--gold);
  color: #fff;
}

.btn-gold:hover,
.btn-gold:focus-visible {
  background: var(--gold-dark);
  border-color: var(--gold-dark);
  color: #fff;
}

.section-label {
  border-bottom: 1px solid var(--line);
  padding-bottom: 1rem;
}

.section-label h2,
.trust-section h2,
.knowledge-map-heading h2,
.article h2 { color: var(--ink); }

.section-intro {
  max-width: 62ch;
  margin: .75rem 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.directory-head {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  align-items: end;
  gap: 2.5rem;
  margin-bottom: 2rem;
}

.directory-head .section-label { margin-bottom: 0 !important; }

.directory-search {
  max-width: none;
  margin: 0;
  padding: 1.15rem 1.25rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
}

.directory-search h3 {
  margin: 0;
  color: var(--ink);
  font-size: 1.3rem;
}

.category-directory {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  column-gap: 1.5rem;
}

.category-entry { border-top: 1px solid var(--line); }

.category-entry-link {
  display: block;
  min-height: 100%;
  padding: 1.25rem 0 1.35rem;
  color: var(--ink);
  text-decoration: none;
  transition: color .2s ease, padding-left .2s ease;
}

.category-entry-link:hover,
.category-entry-link:focus-visible {
  padding-left: .35rem;
  color: var(--gold-dark);
}

.category-entry-media {
  position: relative;
  display: grid;
  aspect-ratio: 4 / 3;
  place-items: center;
  margin: 0 0 1.25rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, #eef1f3, #ffffff);
  color: var(--muted);
}

.category-entry-media .placeholder-mark {
  display: grid;
  width: 78%;
  height: 68%;
  place-items: center;
  border: 1px dashed var(--gold-soft);
  color: var(--gold-dark);
  font-size: .78rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.category-entry-media .category-cover-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.category-entry-media figcaption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  padding: .55rem .7rem;
  background: rgba(255, 255, 255, .9);
  color: var(--muted);
  font-size: .74rem;
  text-align: left;
}

.category-entry-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.category-entry h3 {
  margin: 0;
  font-size: 1.22rem;
  line-height: 1.3;
}

.category-entry-heading span {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.category-entry p {
  max-width: 48ch;
  margin: .55rem 0 .8rem;
  color: var(--muted);
  line-height: 1.55;
}

.category-entry-cta {
  color: var(--gold-dark);
  font-size: .82rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.directory-footer {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.directory-footer p { margin: 0; color: var(--muted); }
.directory-footer .guide-link { font-weight: 700; }

.stone-card {
  height: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.stone-card:hover,
.stone-card:focus-within {
  border-color: var(--gold-soft);
  box-shadow: var(--shadow-sm);
  transform: translateY(-3px);
}

.stone-card img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  height: auto;
  object-fit: cover;
  object-position: center;
}

.stone-card-image { background: #eef0f2; }

.stone-card .card-body { padding: 1.4rem; }
.stone-card h3 { font-size: 1.6rem; }
.stone-card p,
.trust-copy { color: var(--muted); line-height: 1.65; }
.text-gold { color: var(--gold); }

.guide-link {
  color: var(--ink);
  text-decoration: none;
  transition: color .2s ease;
}

.guide-link:hover,
.guide-link:focus-visible { color: var(--gold-dark); }

.trust-section { background: var(--paper); }

.site-footer,
footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .9rem;
}

footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 2rem;
}

footer p { margin: 0; }
footer a { text-decoration: none; transition: color .2s ease; }

.site-search-form { max-width: 560px; }
.site-search-form input { min-height: 44px; }

.search-suggestions {
  margin-top: .65rem;
  padding: .85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  box-shadow: var(--shadow-sm);
}

.search-suggestions-title {
  margin: 0 0 .55rem;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.search-suggestion-list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.search-suggestion {
  border: 1px solid var(--line);
  border-radius: .35rem;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: .9rem;
  padding: .45rem .7rem;
}

.search-suggestion:hover,
.search-suggestion:focus-visible {
  border-color: var(--gold-soft);
  color: var(--gold-dark);
}

.path-link { display: flex !important; align-items: flex-start; gap: .85rem; }
.path-link > span { min-width: 0; }
.path-icon { flex: 0 0 2rem; color: var(--gold-dark); font-size: 1.45rem; line-height: 1.3; }

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem .75rem;
  border: 1px solid var(--gold-soft);
  border-radius: var(--radius);
  background: #fffdf8;
  color: var(--gold-dark);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.site-search-results a {
  display: block;
  padding: .75rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
}

.site-search-results a:hover,
.site-search-results a:focus-visible { color: var(--gold-dark); }
.site-search-results small { display: block; color: var(--muted); }
.search-hint { color: var(--muted); font-size: .9rem; }

:focus-visible {
  outline: 3px solid var(--gold-dark);
  outline-offset: 3px;
}

/* Shared article surface used by every non-home page. */
.article-shell {
  padding: clamp(2rem, 5vw, 4.5rem) 1rem;
}

.article {
  max-width: 850px;
  margin: 0 auto;
  padding: clamp(1.5rem, 5vw, 3.5rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper-2);
  box-shadow: var(--shadow-sm);
}

.article h1 {
  max-width: 18ch;
  margin: 0 0 .8rem;
  font-size: clamp(2.25rem, 5vw, 4.1rem);
}

.article h2 {
  margin-top: 2.75rem;
  margin-bottom: .5rem;
  font-size: clamp(1.65rem, 3vw, 2.25rem);
}

.article h3 { margin-top: 1.5rem; font-size: 1.35rem; }
.article p,
.article li { font-size: 1rem; }
.article ul li,
.article ol li { margin: .5rem 0; }
.article a { color: var(--gold-dark); }
.article a:hover { color: var(--ink); }

.status-strip {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin: 1.5rem 0;
}

.status-strip span,
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: .4rem .75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--muted);
  font-size: .86rem;
}

.pick-grid,
.product-grid,
.split-grid,
.method-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.25rem 0;
}

.pick {
  display: block;
  height: 100%;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.pick:hover,
.pick:focus-visible,
.product-card:hover {
  border-color: var(--gold-soft);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.pick span,
.map-kicker {
  color: var(--gold);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.pick h3 { margin: .45rem 0 .35rem; }
.pick p { margin-bottom: 0; color: var(--muted); }
.taxonomy-card-count { display: inline-block; margin-top: .9rem; color: var(--gold-dark); font-size: .86rem; }
.taxonomy-subcategory-index { display: flex; flex-wrap: wrap; gap: .65rem; margin: 1.5rem 0 2.25rem; }
.taxonomy-subcategory-link { display: inline-flex; align-items: center; gap: .5rem; padding: .55rem .75rem; border: 1px solid var(--line); border-radius: 999px; background: var(--paper); color: var(--ink); font-size: .9rem; text-decoration: none; }
.taxonomy-subcategory-link span { color: var(--gold-dark); font-size: .78rem; font-weight: 700; }
.taxonomy-subcategory-link:hover,
.taxonomy-subcategory-link:focus-visible { border-color: var(--gold-soft); color: var(--gold-dark); }
.taxonomy-group { margin-top: 2.5rem; }
.taxonomy-group .section-label { margin-bottom: 1.15rem; }
.taxonomy-heading-link { color: inherit; text-decoration: none; }
.taxonomy-heading-link:hover,
.taxonomy-heading-link:focus-visible { color: var(--gold-dark); }
.taxonomy-page .breadcrumb a { color: var(--gold-dark); text-decoration: none; }
.taxonomy-page .breadcrumb a:hover,
.taxonomy-page .breadcrumb a:focus-visible { text-decoration: underline; }
.site-header .dropdown-menu { max-height: min(70vh, 520px); overflow-y: auto; border-color: var(--line); box-shadow: var(--shadow-sm); }
.site-header .dropdown-item { color: var(--ink); font-size: .9rem; }
.site-header .dropdown-item:hover,
.site-header .dropdown-item:focus-visible { background: var(--paper); color: var(--gold-dark); }

.table-wrap {
  margin: 1.25rem 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.table-wrap table {
  width: 100%;
  min-width: 560px;
  margin: 0;
  border-collapse: collapse;
  background: var(--paper-2);
}

.table-wrap th,
.table-wrap td {
  padding: .8rem .9rem;
  border-bottom: 1px solid var(--line-2);
  text-align: left;
  vertical-align: top;
}

.table-wrap th { background: var(--paper); font-weight: 700; }
.table-wrap tr:last-child td { border-bottom: 0; }

.notice,
.callout-list,
.compliance-strip {
  margin: 1.25rem 0;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--muted);
}

.notice b,
.compliance-strip strong { color: var(--ink); }

.source-note,
.mini-note { color: var(--muted); font-size: .9rem; }

.library-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem;
  margin: 1.25rem 0 .25rem;
}

.library-filter label { color: var(--muted); font-size: .9rem; font-weight: 700; }
.library-filter select { min-height: 44px; }
.pick.is-hidden { display: none; }

.image-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.image-item {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.image-item img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.image-caption { margin: 0; padding: .75rem .9rem; color: var(--muted); font-size: .86rem; line-height: 1.45; }
.image-caption strong { color: var(--ink); }

.knowledge-map {
  margin: 2rem 0 3rem;
  padding: 1.75rem 0 .5rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.knowledge-map-heading { max-width: 560px; margin-bottom: 1.5rem; }
.knowledge-map-heading h2 { margin: 0; }
.knowledge-map-heading p:not(.eyebrow) { color: var(--muted); }

.map-tree {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px minmax(0, 1fr);
  grid-template-rows: 1fr 1fr;
  gap: 1rem 1.5rem;
  align-items: center;
  min-height: 360px;
}

.map-core {
  z-index: 1;
  display: grid;
  grid-column: 2;
  grid-row: 1 / span 2;
  aspect-ratio: 1;
  place-items: center;
  padding: 1.25rem;
  border: 1px solid var(--gold);
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  text-align: center;
}

.map-core strong { font-size: 1.3rem; line-height: 1.15; }
.map-core .map-kicker { color: var(--gold-soft); }

.map-branch {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 132px;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow-sm);
}

.map-branch-left { grid-column: 1; justify-content: flex-end; text-align: right; }
.map-branch-right { grid-column: 3; text-align: left; }
.map-branch-top { grid-row: 1; }
.map-branch-bottom { grid-row: 2; }
.map-branch h3 { margin: .3rem 0 .5rem; font-size: 1.35rem; }
.map-branch a { display: inline-block; margin: .1rem 0 0 .75rem; color: var(--gold-dark); font-size: .88rem; font-weight: 700; text-decoration: none; }
.map-branch-right a { margin: .1rem .75rem 0 0; }
.map-branch a:hover { text-decoration: underline; }
.map-line { position: absolute; width: 1.5rem; border-top: 1px solid var(--gold-soft); }
.map-branch-left .map-line { right: -1.55rem; }
.map-branch-right .map-line { left: -1.55rem; }

.cta-panel {
  margin: 1.75rem 0;
  padding: 1.5rem;
  border: 1px solid var(--gold-soft);
  border-radius: var(--radius-lg);
  background: #fffdf8;
  box-shadow: var(--shadow-sm);
}

.cta-panel h2,
.cta-panel h3 { margin-top: 0; }
.cta-panel p { color: var(--muted); }

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

.product-card {
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  box-shadow: var(--shadow-sm);
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.product-card h3 { margin: .7rem 0 .25rem; font-size: 1.3rem; }
.product-card p { color: var(--muted); font-size: .95rem; }
.product-card a { color: var(--gold-dark); font-weight: 700; text-decoration: none; }
.product-card a:hover { text-decoration: underline; }

.article blockquote { margin: 1.5rem 0; padding: 1rem 1.2rem; border-left: 4px solid var(--gold); background: var(--paper); color: var(--muted); }
.article .img-frame { width: 100%; margin: 1.5rem 0; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.article-image-placeholder { display: grid; aspect-ratio: 4 / 3; place-items: center; margin: 1.5rem 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(135deg, #eef1f3, #ffffff); color: var(--muted); text-align: center; }
.article-image-placeholder .placeholder-mark { display: grid; width: 78%; height: 68%; place-items: center; border: 1px dashed var(--gold-soft); color: var(--gold-dark); font-size: .82rem; letter-spacing: .08em; text-transform: uppercase; }
.article-image-placeholder figcaption { align-self: end; width: 100%; padding: .7rem .9rem; background: rgba(255, 255, 255, .9); color: var(--muted); font-size: .82rem; text-align: left; }
.article-image-placeholder figcaption a { color: var(--gold-dark); }
.stone-pager { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin: 2rem 0 1rem; }
.stone-pager a { display: flex; flex-direction: column; gap: .25rem; min-height: 82px; padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); color: var(--ink); text-decoration: none; }
.stone-pager a:last-child { text-align: right; }
.stone-pager a:hover,
.stone-pager a:focus-visible { border-color: var(--gold-soft); color: var(--gold-dark); }
.stone-pager span { color: var(--muted); font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; }
.empty-library { margin-top: 1rem; color: var(--muted); }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 991.98px) {
  .site-header > .logo { margin-right: 1rem; }
  .site-header > nav:not(.container) { gap: .8rem 1rem; }
  .map-tree { grid-template-columns: minmax(0, 1fr) 160px minmax(0, 1fr); }
  .category-directory { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 767.98px) {
  .site-header:not(:has(> nav.container)) { align-items: flex-start; }
  .site-header > nav:not(.container) { flex: 1 1 100%; width: 100%; }
  .hero h1 { max-width: 16ch; font-size: clamp(2.6rem, 11vw, 4rem); }
  .directory-head { grid-template-columns: 1fr; gap: 1.5rem; }
  .category-directory { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .directory-footer { display: block; }
  .directory-footer .guide-link { display: inline-block; margin-top: .55rem; }
  .pick-grid,
  .method-steps,
  .product-grid,
  .split-grid { grid-template-columns: 1fr; }
  .image-gallery { grid-template-columns: 1fr; }
  .stone-pager { grid-template-columns: 1fr; }
  .stone-pager a:last-child { text-align: left; }
  .map-tree { grid-template-columns: 1fr; grid-template-rows: auto; min-height: 0; }
  .map-core { grid-column: 1; grid-row: auto; aspect-ratio: auto; min-height: 110px; border-radius: var(--radius); }
  .map-branch-left,
  .map-branch-right { grid-column: 1; grid-row: auto; justify-content: flex-start; text-align: left; }
  .map-branch a,
  .map-branch-right a { margin: .1rem .75rem 0 0; }
  .map-line { top: -1rem; left: 1.25rem !important; right: auto !important; width: 1px; height: 1rem; border-top: 0; border-left: 1px solid var(--gold-soft); }
}

@media (max-width: 575.98px) {
  .category-directory { grid-template-columns: 1fr; }
}

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