/* ============================================================
   VSG Stone Knowledge — shared stylesheet
   Design tokens match vsg-website (Cormorant Garamond + Jost,
   cream/gold/charcoal palette). Loaded by every /stones/*.html page.
   ============================================================ */

:root{
  --cream:#F5F0E8;--warm-white:#FAF8F4;--stone:#C8B89A;--stone-dark:#A09070;
  --charcoal:#2A2620;--mid:#6B6358;--gold:#B8963C;--gold-light:#D4AF6A;--black:#1A1714;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:'Jost',sans-serif;background:var(--warm-white);color:var(--charcoal);font-weight:300;overflow-x:hidden;line-height:1.7;}

/* ---------- TOPBAR ---------- */
.topbar{background:var(--black);color:var(--stone);font-size:11px;letter-spacing:.12em;text-transform:uppercase;display:flex;justify-content:space-between;align-items:center;padding:8px 48px;}
.topbar a{color:var(--stone);text-decoration:none;}
.topbar a:hover{color:var(--gold-light);}
.topbar-right{display:flex;gap:20px;align-items:center;}

/* ---------- NAV ---------- */
nav{position:sticky;top:0;z-index:200;background:rgba(15,13,11,.95);backdrop-filter:blur(12px);border-bottom:1px solid rgba(200,184,154,.12);display:flex;align-items:center;justify-content:space-between;padding:0 48px;height:72px;transition:box-shadow .3s;}
nav.scrolled{box-shadow:0 4px 32px rgba(26,23,20,.1);}
.nav-logo{text-decoration:none;display:flex;align-items:center;}
.vsg-logo-svg{display:block;width:auto;color:var(--cream);fill:currentColor;}
.nav-logo-svg{height:30px;}
.footer-logo-svg{height:34px;color:var(--cream);}
.nav-links{display:flex;gap:28px;list-style:none;align-items:center;}
.nav-links a{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:rgba(200,184,154,.7);text-decoration:none;transition:color .2s;font-weight:400;}
.nav-links a:hover,.nav-links a.current{color:var(--charcoal);}
.nav-links a.current{color:var(--gold-light);}
.nav-cta{background:var(--gold);color:white!important;padding:10px 22px;letter-spacing:.12em;font-size:11px;transition:background .2s!important;}
.nav-cta:hover{background:var(--gold-light)!important;color:white!important;}
.nav-burger{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px;}
.nav-burger span{display:block;width:22px;height:1.5px;background:var(--charcoal);}
.nav-mobile-panel{display:none;position:fixed;top:60px;left:0;right:0;background:var(--warm-white);border-bottom:1px solid rgba(200,184,154,.3);z-index:199;padding:8px 20px 20px;flex-direction:column;}
.nav-mobile-panel.open{display:flex;}
.nav-mobile-panel a{padding:14px 0;font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--charcoal);text-decoration:none;border-bottom:1px solid rgba(200,184,154,.15);}

/* ---------- ARTICLE HERO ---------- */
.article-hero{background:var(--black);padding:120px 48px 72px;position:relative;overflow:hidden;}
.article-hero::after{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at top right,rgba(184,150,60,.12),transparent 60%);pointer-events:none;}
.breadcrumb{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:rgba(200,184,154,.5);margin-bottom:24px;display:flex;gap:8px;align-items:center;flex-wrap:wrap;position:relative;}
.breadcrumb a{color:rgba(200,184,154,.6);text-decoration:none;}
.breadcrumb a:hover{color:var(--gold-light);}
.breadcrumb span{color:rgba(200,184,154,.3);}
.article-eyebrow{font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--gold-light);margin-bottom:18px;display:flex;align-items:center;gap:14px;position:relative;}
.article-eyebrow::before{content:'';display:block;width:40px;height:1px;background:var(--gold);}
.article-hero h1{font-family:'Cormorant Garamond',serif;font-size:clamp(38px,6vw,68px);font-weight:300;line-height:1.08;color:white;margin-bottom:20px;max-width:820px;position:relative;}
.article-hero h1 em{font-style:italic;color:var(--stone);}
.article-dek{font-size:16px;color:rgba(245,240,232,.65);max-width:680px;line-height:1.8;position:relative;}

/* ---------- ARTICLE BODY ---------- */
.article-wrap{max-width:780px;margin:0 auto;padding:72px 24px 40px;}
.article-wrap h2{font-family:'Cormorant Garamond',serif;font-size:clamp(26px,3.2vw,36px);font-weight:400;color:var(--charcoal);margin:52px 0 18px;line-height:1.2;}
.article-wrap h2:first-child{margin-top:0;}
.article-wrap h2 em{font-style:italic;color:var(--gold);}
.article-wrap h3{font-family:'Jost',sans-serif;font-size:14px;letter-spacing:.1em;text-transform:uppercase;color:var(--gold);font-weight:500;margin:36px 0 14px;}
.article-wrap p{font-size:16px;color:var(--mid);margin-bottom:20px;line-height:1.85;}
.article-wrap p strong{color:var(--charcoal);font-weight:500;}
.article-wrap ul,.article-wrap ol{margin:0 0 20px 0;padding-left:0;list-style:none;}
.article-wrap ul li,.article-wrap ol li{font-size:16px;color:var(--mid);margin-bottom:12px;padding-left:26px;position:relative;line-height:1.7;}
.article-wrap ul li::before{content:'';position:absolute;left:0;top:10px;width:6px;height:6px;background:var(--gold);border-radius:50%;}
.article-wrap ol{counter-reset:vsg-ol;}
.article-wrap ol li{counter-increment:vsg-ol;}
.article-wrap ol li::before{content:counter(vsg-ol);position:absolute;left:0;top:0;width:18px;height:18px;font-size:10px;color:var(--gold);font-weight:500;background:none;border-radius:0;}
.article-wrap a{color:var(--gold);text-decoration:underline;text-decoration-color:rgba(184,150,60,.35);text-underline-offset:3px;}
.article-wrap a.btn-primary{color:white;text-decoration:none;}
.article-wrap a.btn-ghost-dark{color:var(--charcoal);text-decoration:none;}
.article-wrap a:hover{text-decoration-color:var(--gold);}

/* fact panel — used for hardness/composition/quick stats */
.fact-panel{background:var(--cream);border:1px solid rgba(200,184,154,.4);padding:28px 32px;margin:32px 0;}
.fact-panel-title{font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);margin-bottom:18px;}
.fact-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px 28px;}
.fact-item dt{font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--stone-dark);margin-bottom:4px;}
.fact-item dd{font-family:'Cormorant Garamond',serif;font-size:21px;color:var(--charcoal);}

/* pull quote */
blockquote{border-left:2px solid var(--gold);padding:4px 0 4px 28px;margin:36px 0;font-family:'Cormorant Garamond',serif;font-size:23px;font-style:italic;color:var(--charcoal);line-height:1.5;}

/* care callout (do/don't, sealing notes) */
.callout{background:var(--charcoal);color:var(--cream);padding:28px 32px;margin:32px 0;}
.callout-title{font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--gold-light);margin-bottom:14px;}
.callout p{color:rgba(245,240,232,.75);margin-bottom:0;}
.callout p+p{margin-top:14px;}

.dos-donts{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:32px 0;}
.dos-donts > div{padding:24px;border:1px solid rgba(200,184,154,.3);}
.dos-donts h4{font-size:11px;letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px;}
.dos h4{color:#5d7c5a;}
.donts h4{color:#a14a3e;}
.dos-donts ul li::before{display:none;}
.dos-donts ul li{padding-left:0;font-size:14px;}

/* CTA block — sits inline within articles to drive to showroom/contact */
.article-cta{background:linear-gradient(135deg,var(--black),#231f1a);padding:48px 40px;margin:48px 0;text-align:center;}
.article-cta .section-label{justify-content:center;color:var(--gold-light);}
.article-cta .section-label::after{display:none;}
.article-cta h3{font-family:'Cormorant Garamond',serif;font-size:28px;font-weight:300;color:white;margin:10px 0 20px;}
.article-cta p{color:rgba(245,240,232,.6);max-width:480px;margin:0 auto 26px;font-size:14px;}
.btn-primary{background:var(--gold);color:white;text-decoration:none;padding:15px 32px;font-size:11px;letter-spacing:.16em;text-transform:uppercase;font-family:'Jost',sans-serif;transition:background .2s,transform .2s;display:inline-block;border:none;cursor:pointer;}
.btn-primary:hover{background:var(--gold-light);transform:translateY(-1px);}
.btn-ghost-dark{border:1px solid rgba(42,38,32,.3);color:var(--charcoal);text-decoration:none;padding:15px 32px;font-size:11px;letter-spacing:.16em;text-transform:uppercase;font-family:'Jost',sans-serif;transition:border-color .2s;display:inline-block;margin-left:12px;}
.btn-ghost-dark:hover{border-color:var(--gold);color:var(--gold);}

/* related stones / articles grid */
.related-section{background:var(--cream);padding:64px 48px;margin-top:32px;}
.related-inner{max-width:1100px;margin:0 auto;}
.section-label{font-size:10px;letter-spacing:.26em;text-transform:uppercase;color:var(--gold);margin-bottom:16px;display:flex;align-items:center;gap:12px;}
.section-label::after{content:'';display:block;flex:1;max-width:48px;height:1px;background:var(--gold);}
.related-title{font-family:'Cormorant Garamond',serif;font-size:clamp(26px,3.5vw,38px);font-weight:300;margin-bottom:36px;}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;}
.related-card{background:var(--warm-white);border:1px solid rgba(200,184,154,.3);text-decoration:none;display:block;overflow:hidden;transition:border-color .2s,transform .2s;}
.related-card:hover{border-color:var(--gold);transform:translateY(-2px);}
.related-card img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block;}
.related-card-body{padding:16px 18px;}
.related-card-cat{font-size:9px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold);margin-bottom:4px;}
.related-card-name{font-family:'Cormorant Garamond',serif;font-size:19px;color:var(--charcoal);}

/* author / updated meta line */
.article-meta{display:flex;gap:18px;align-items:center;font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--stone-dark);margin-bottom:36px;flex-wrap:wrap;}
.article-meta span::before{content:'·';margin-right:18px;color:var(--stone);}
.article-meta span:first-child::before{display:none;}

/* table of contents */
.toc{background:var(--cream);border:1px solid rgba(200,184,154,.4);padding:24px 28px;margin-bottom:40px;}
.toc-title{font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);margin-bottom:14px;}
.toc ul{margin:0;}
.toc li{margin-bottom:9px;font-size:14px;}
.toc li::before{display:none;}
.toc a{color:var(--mid);text-decoration:none;}
.toc a:hover{color:var(--gold);}

/* ---------- FOOTER (shared with main site) ---------- */
footer{background:var(--black);padding:64px 48px 32px;}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;padding-bottom:48px;border-bottom:1px solid rgba(200,184,154,.12);margin-bottom:32px;max-width:1280px;margin-left:auto;margin-right:auto;}
.footer-tagline{font-size:13px;color:rgba(200,184,154,.5);line-height:1.7;max-width:280px;margin-top:16px;}
.footer-col-title{font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--gold-light);margin-bottom:20px;}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:13px;color:rgba(200,184,154,.55);text-decoration:none;transition:color .2s;}
.footer-links a:hover{color:var(--cream);}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:rgba(200,184,154,.3);letter-spacing:.06em;flex-wrap:wrap;gap:12px;max-width:1280px;margin-left:auto;margin-right:auto;}
.footer-acknowledgement{font-size:11px;color:rgba(200,184,154,.25);line-height:1.7;max-width:600px;margin-bottom:20px;max-width:1280px;margin-left:auto;margin-right:auto;}

/* ---------- RESPONSIVE ---------- */
@media(max-width:900px){
  .topbar{display:none;}
  nav{height:60px;padding:0 20px;}
  .nav-links{display:none;}
  .nav-burger{display:flex;}
  .article-hero{padding:48px 20px 56px;}
  .article-wrap{padding:48px 20px 20px;}
  .fact-grid{grid-template-columns:1fr 1fr;}
  .dos-donts{grid-template-columns:1fr;}
  .related-section{padding:48px 20px;}
  .footer-top{grid-template-columns:1fr 1fr;padding-left:0;padding-right:0;}
  .article-cta{padding:40px 24px;}
  .btn-ghost-dark{margin-left:0;margin-top:12px;}
}
@media(max-width:600px){
  .footer-top{grid-template-columns:1fr;}
  .fact-grid{grid-template-columns:1fr;}
  blockquote{font-size:19px;}
}