/* All About Gemstones — gemology library (teal / magenta / plum) */
:root{
  --ink:#2a2a33;--ink-soft:#54545f;--muted:#8b8b96;--line:#e4e7ee;
  --paper:#ffffff;--mist:#eef1f6;--mist-2:#e6eaf1;
  --teal:#0f8a9c;--teal-2:#14a6bb;--teal-ink:#0c6c7a;
  --magenta:#d61f75;--magenta-2:#e5397f;
  --plum:#2b1a47;--plum-2:#38215a;--plum-3:#221338;
  --max:1180px;
  --head:"Montserrat",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  --body:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:16.5px;line-height:1.68;-webkit-font-smoothing:antialiased}
a{color:var(--teal-ink);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
h1,h2,h3,h4,h5,.wordmark{font-family:var(--head);letter-spacing:-.01em}

/* header */
.masthead{background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
.masthead .wrap{display:flex;align-items:center;justify-content:space-between;min-height:66px;gap:18px}
.brand{display:inline-flex;align-items:center;gap:11px;color:var(--ink)}
.brand:hover{text-decoration:none}
.gem-mark{width:34px;height:34px;flex:0 0 34px}
.wordmark{font-size:20px;font-weight:700;color:var(--plum);line-height:1}
.wordmark b{color:var(--teal)}
.wordmark span{display:block;font-family:var(--body);font-size:9.5px;letter-spacing:.28em;text-transform:uppercase;color:var(--magenta);font-weight:600;margin-top:3px}
.nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.nav a{color:var(--ink);font-weight:600;font-size:13.5px;padding:9px 13px;border-radius:5px}
.nav a:hover{color:var(--teal);background:var(--mist);text-decoration:none}

main{display:block}

/* hero */
.hero{position:relative;color:#fff;background-size:cover;background-position:center;overflow:hidden}
.hero .wrap{position:relative;z-index:2;padding:74px 22px 78px;max-width:var(--max)}
.hero-copy{max-width:620px}
.hero .eyebrow{display:inline-block;color:var(--teal-2);font-weight:700;font-size:12px;letter-spacing:.18em;text-transform:uppercase;margin-bottom:14px}
.hero h1{font-size:44px;line-height:1.08;margin:0 0 8px;font-weight:700}
.hero .rule{width:56px;height:3px;background:var(--magenta);margin:16px 0 18px;border:0}
.hero p{font-size:18px;color:#e9e4f1;max-width:48ch;margin:0 0 24px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}

.btn{display:inline-block;background:var(--magenta);color:#fff;font-family:var(--head);font-weight:600;font-size:14px;padding:12px 24px;border-radius:6px;border:0;cursor:pointer}
.btn:hover{background:var(--magenta-2);text-decoration:none;color:#fff}
.btn.teal{background:var(--teal)}
.btn.teal:hover{background:var(--teal-2)}
.btn.ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.7)}
.btn.ghost:hover{background:#fff;color:var(--plum)}

/* feature tiles */
.tiles{background:var(--mist);border-bottom:1px solid var(--line)}
.tiles .wrap{padding:44px 22px}
.tiles h2{text-align:center;font-size:24px;margin:0 0 30px;color:var(--plum)}
.tile-row{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.tile{text-align:center;padding:0 10px}
.tile .ic{width:56px;height:56px;margin:0 auto 14px}
.tile h3{font-size:18px;margin:0 0 7px;color:var(--ink)}
.tile p{font-size:14.5px;color:var(--muted);margin:0 0 10px}
.tile a{font-family:var(--head);font-weight:600;font-size:13px;color:var(--magenta)}
.tile a:hover{color:var(--magenta-2)}

/* section shell */
.section{padding:52px 0}
.section.alt{background:var(--mist)}
.section-head{text-align:center;max-width:720px;margin:0 auto 34px}
.section-head .kick{color:var(--magenta);font-weight:700;font-size:12px;letter-spacing:.16em;text-transform:uppercase}
.section-head h2{font-size:30px;margin:.25em 0 .2em;color:var(--plum)}
.section-head p{color:var(--muted);font-size:16px;margin:0}

/* card grids */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid.g4{grid-template-columns:repeat(4,1fr)}
.gcard{position:relative;display:block;border-radius:10px;overflow:hidden;aspect-ratio:4/3;color:#fff;background:var(--plum)}
.gcard img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.gcard:hover{text-decoration:none}
.gcard:hover img{transform:scale(1.06)}
.gcard::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,10,35,0) 38%,rgba(20,10,35,.82))}
.gcard .lab{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:16px 18px}
.gcard .lab h3{font-size:19px;margin:0 0 3px;color:#fff}
.gcard .lab .go{font-family:var(--head);font-weight:600;font-size:12.5px;color:var(--teal-2)}

/* article cards (guides) */
.acard{display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--line);border-radius:10px;overflow:hidden;color:var(--ink)}
.acard:hover{text-decoration:none;box-shadow:0 12px 26px rgba(43,26,71,.12);transform:translateY(-2px);transition:.15s}
.acard .thumb{aspect-ratio:16/10;position:relative;overflow:hidden;background:var(--plum)}
.acard .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.acard .cb{padding:15px 17px 18px}
.acard .tag{font-family:var(--head);font-weight:700;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--teal)}
.acard h3{font-size:18px;line-height:1.28;margin:5px 0 6px}
.acard p{font-size:14px;color:var(--muted);margin:0 0 9px}
.acard .rm{font-family:var(--head);font-weight:600;font-size:12.5px;color:var(--magenta)}

/* CTA band */
.band{background:linear-gradient(120deg,var(--plum-3),var(--plum-2));color:#fff}
.band .wrap{padding:46px 22px;text-align:center}
.band h2{font-size:27px;margin:0 0 8px}
.band p{color:#d9d0e6;max-width:56ch;margin:0 auto 20px}

/* article + gem pages */
.page-hero{position:relative;color:#fff;background-size:cover;background-position:center}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(35,19,56,.55),rgba(35,19,56,.82))}
.page-hero .wrap{position:relative;z-index:2;padding:52px 22px 46px}
.crumb{font-size:12.5px;letter-spacing:.04em;color:#cbb8dd;margin-bottom:12px}
.crumb a{color:#e7c9dd}
.page-hero .kick{color:var(--teal-2);font-weight:700;font-size:12px;letter-spacing:.16em;text-transform:uppercase}
.page-hero h1{font-size:38px;margin:.2em 0 .28em;font-weight:700;max-width:20ch}
.page-hero .sub{font-size:17.5px;color:#e9e2f2;max-width:60ch;margin:0}
.gmeta{margin-top:16px;font-size:13px;color:#c9bcda}

.body-wrap{max-width:var(--max);margin:0 auto;padding:40px 22px 8px;display:grid;grid-template-columns:1fr 320px;gap:40px;align-items:start}
.body-wrap.solo{grid-template-columns:minmax(0,760px);justify-content:center}
.prose{min-width:0}
.prose h2{font-size:26px;margin:1.5em 0 .4em;color:var(--plum)}
.prose h3{font-size:20px;margin:1.3em 0 .35em;color:var(--ink)}
.prose p{font-size:17px;margin:0 0 1.1em}
.prose ul,.prose ol{font-size:17px;padding-left:1.2em;margin:0 0 1.1em}
.prose li{margin-bottom:.5em}
.prose strong{color:var(--ink)}
.prose a{color:var(--teal-ink);text-decoration:underline}
.prose blockquote{margin:1.4em 0;padding:6px 0 6px 20px;border-left:3px solid var(--magenta);font-size:19px;color:var(--plum);font-style:italic}
.callout{background:var(--mist);border:1px solid var(--line);border-left:3px solid var(--teal);border-radius:0 8px 8px 0;padding:16px 20px;margin:24px 0}
.callout h4{margin:0 0 5px;font-size:12.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--teal-ink)}
.callout p{margin:0;font-size:15px;color:var(--ink-soft)}

/* gem infobox */
.infobox{background:var(--paper);border:1px solid var(--line);border-radius:12px;overflow:hidden;position:sticky;top:82px;box-shadow:0 8px 24px rgba(43,26,71,.07)}
.infobox .ib-head{background:linear-gradient(120deg,var(--plum-2),var(--plum));color:#fff;padding:15px 18px}
.infobox .ib-head h3{margin:0;font-size:16px;color:#fff}
.infobox .ib-head span{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--teal-2);font-weight:600}
.infobox dl{margin:0;padding:6px 18px 12px}
.infobox .row{display:grid;grid-template-columns:1fr;gap:1px;padding:11px 0;border-bottom:1px solid var(--line)}
.infobox .row:last-child{border-bottom:0}
.infobox dt{font-family:var(--head);font-weight:600;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--magenta)}
.infobox dd{margin:2px 0 0;font-size:14.5px;color:var(--ink)}

/* related + within-body cards */
.related{max-width:var(--max);margin:8px auto 0;padding:10px 22px 8px}
.related h2{font-size:22px;color:var(--plum);margin:0 0 16px}

/* simple pages */
.simple{max-width:780px;margin:0 auto;padding:20px 22px 10px}
.simple h1{font-size:34px;color:var(--plum);margin:.2em 0 .5em}
.simple h2{font-size:22px;color:var(--ink);margin:1.3em 0 .3em}
.simple p,.simple li{font-size:16.5px}
.simple ul{padding-left:1.2em}

/* footer */
footer{background:var(--plum-3);color:#c3b6d4}
footer .wrap{padding:46px 22px 22px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
.foot-brand .wordmark{color:#fff}
.foot-brand .wordmark b{color:var(--teal-2)}
.foot-brand p{font-size:13.5px;color:#a394ba;margin:14px 0 0;max-width:34ch}
footer h5{color:#fff;font-size:12px;letter-spacing:.12em;text-transform:uppercase;margin:0 0 12px}
footer ul{list-style:none;margin:0;padding:0}
footer li{margin-bottom:8px}
footer a{color:#c3b6d4;font-size:14px}
footer a:hover{color:var(--teal-2)}
.foot-bottom{border-top:1px solid #3a2a52;margin-top:30px;padding-top:16px;display:flex;justify-content:space-between;font-size:12.5px;color:#8f80a8;flex-wrap:wrap;gap:10px}
.foot-bottom a{color:#8f80a8}

@media(max-width:900px){
  .hero h1{font-size:34px}
  .tile-row{grid-template-columns:1fr;gap:22px}
  .grid,.grid.g4{grid-template-columns:repeat(2,1fr)}
  .body-wrap{grid-template-columns:1fr;gap:26px}
  .infobox{position:static;order:-1}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){
  .grid,.grid.g4{grid-template-columns:1fr}
  .hero h1{font-size:29px}.page-hero h1{font-size:28px}
  .nav{display:none}
  .foot-grid{grid-template-columns:1fr}
}