/* Critical Materials Atlas — shared design system (teal-charcoal / Inter) */
:root{
  --ink:#1a1f24; --ink-soft:#3c4650; --mut:#667179; --faint:#9aa6ad;
  --line:#e6e9e8; --line-strong:#ccd5d3; --navy:#15323a; --navy2:#1d4a52;
  --bg:#fff; --bg-soft:#f4f7f6; --accent:#0e7c74; --hot:#b4532b;
}
*{box-sizing:border-box}
body{font-family:'Inter',system-ui,Segoe UI,Arial,sans-serif;margin:0;color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased}
.wrap{max-width:1220px;margin:0 auto;padding:0 1.6rem}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

/* top nav */
.topbar{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.94);-webkit-backdrop-filter:saturate(140%) blur(8px);backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;height:58px}
.wordmark{display:flex;align-items:center;gap:.6rem;font-weight:800;letter-spacing:.15em;font-size:.82rem;text-transform:uppercase;color:var(--navy);text-decoration:none}
.wordmark:hover{text-decoration:none}
.wordmark .mark{width:15px;height:15px;background:var(--navy);transform:rotate(45deg);border-radius:2px}
.topnav{display:flex;align-items:center;gap:1.5rem}
.topnav a{color:var(--ink-soft);font-size:.86rem;font-weight:600}
.topnav a:hover{color:var(--navy);text-decoration:none}
.topnav a.active{color:var(--navy);border-bottom:2px solid var(--navy);padding-bottom:2px}
@media(max-width:760px){ .topnav{gap:1rem} .topnav a.hideable{display:none} }

/* hero */
.hero{background:linear-gradient(160deg,#12272c 0%,#173a42 58%,#1d4751 100%);color:#fff;padding:2.6rem 0 2.1rem;border-bottom:3px solid var(--accent);position:relative;overflow:hidden}
.hero .wrap{position:relative;z-index:1}
.hero-motif{position:absolute;top:50%;right:-60px;transform:translateY(-50%);width:500px;height:500px;pointer-events:none}
@media(max-width:900px){ .hero-motif{right:-200px;opacity:.6} }
@media(max-width:760px){ .hero-motif{display:none} }
.hero .eyebrow{font-size:.72rem;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:#5cbcb1;margin-bottom:.7rem}
.hero h1{font-size:2.2rem;line-height:1.08;letter-spacing:-.022em;font-weight:800;color:#fff;margin:0;max-width:24ch}
.hero .deck{font-size:1.04rem;line-height:1.5;color:#bdd1cf;max-width:70ch;margin:.85rem 0 0}
.hero .byline{font-size:.8rem;color:#84a09c;margin-top:1.1rem}
.hero .byline a{color:#bdd1cf}

/* key-figures strip */
.stats{background:#fff;border-bottom:1px solid var(--line)}
.stats .wrap{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.stat{padding:1.3rem 1.4rem;border-left:1px solid var(--line)}
.stat:first-child{border-left:none;padding-left:0}
.stat .n{font-size:1.6rem;font-weight:800;color:var(--navy);letter-spacing:-.02em;line-height:1.05}
.stat .l{font-size:.78rem;color:var(--mut);margin-top:.4rem;line-height:1.3}

/* article */
article{max-width:840px;margin:0 auto;padding:2rem 1.6rem 1rem}
article>p,article>ul,article>ol{color:var(--ink-soft)}
h2{font-size:1.18rem;margin-top:1.9rem;padding-top:1rem;border-top:1px solid var(--line);color:var(--navy);letter-spacing:-.01em}
h3{font-size:1rem;color:var(--navy);margin:1.2rem 0 .4rem}
.callout{background:var(--bg-soft);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:8px;padding:.9rem 1.15rem;margin:.9rem 0;color:var(--ink)}
.howto{margin-top:.45rem}
.howto summary{cursor:pointer;color:var(--accent);font-weight:600;display:inline-block;padding:.1rem 0}
.howto summary:hover{text-decoration:underline}
.howto[open] summary{margin-bottom:.2rem}
.howto p,.howto li{color:var(--mut);line-height:1.55}
.howto-src{font-size:.74rem;color:var(--mut);opacity:.85;border-top:1px solid var(--line);padding-top:.4rem;margin-top:.5rem}
.callout.hot{border-left-color:var(--hot)}
.callout b{color:var(--navy)}

/* share bars */
.barrow{display:grid;grid-template-columns:9rem 1fr 2.6rem;gap:.5rem;align-items:center;font-size:.85rem;padding:.16rem 0}
.barrow .bc{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--ink-soft)}
.barrow .bw{display:block;background:#eef2f1;border-radius:4px;height:15px;overflow:hidden}
.barrow .bf{display:block;height:100%;border-radius:4px;background:var(--navy)}
.barrow .bf.ore{background:#c77f0a}.barrow .bf.ref{background:#6d5fb0}.barrow .bf.res{background:#2e8b57}
.barrow .bv{text-align:right;font-variant-numeric:tabular-nums;color:var(--mut)}

/* tables */
table{border-collapse:collapse;width:100%;font-size:.88rem;margin:.9rem 0}
caption{caption-side:top;text-align:left;font-size:.82rem;color:var(--mut);margin-bottom:.4rem}
th,td{padding:.45rem .6rem;border-bottom:1px solid var(--line);text-align:left}
th{color:var(--navy);border-bottom:2px solid var(--line-strong);font-weight:700;font-size:.76rem;text-transform:uppercase;letter-spacing:.03em}
td.n,th.n{text-align:right;font-variant-numeric:tabular-nums}
tbody tr:hover{background:var(--bg-soft)}
.note{font-size:.82rem;color:var(--mut)}

/* buttons */
.btnrow{display:flex;gap:.7rem;flex-wrap:wrap;margin:1.4rem 0 .4rem}
.btn{display:inline-block;font-weight:600;font-size:.9rem;padding:.55rem 1.1rem;border-radius:8px;text-decoration:none}
.btn.primary{background:var(--navy);color:#fff}.btn.primary:hover{background:var(--navy2);text-decoration:none}
.btn.ghost{border:1px solid var(--line);color:var(--navy);background:#fff}.btn.ghost:hover{background:var(--bg-soft);text-decoration:none}

/* profile index cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1rem;margin:1.4rem 0}
.card{border:1px solid var(--line);border-radius:12px;padding:1rem 1.1rem;text-decoration:none;color:var(--ink);background:#fff;transition:border-color .12s,box-shadow .12s}
.card:hover{border-color:var(--navy);box-shadow:0 6px 20px rgba(16,24,40,.07);text-decoration:none}
.card .ct{font-weight:700;color:var(--navy);font-size:1rem;line-height:1.2}
.card .cg{font-size:.8rem;color:var(--mut);margin-top:.45rem}
.card .cg b{color:var(--hot)}

/* footer */
footer.siteftr{background:#12272c;color:#a4b9b6;margin-top:2.8rem;padding:2.4rem 0 2rem;font-size:.84rem;line-height:1.6}
footer.siteftr .wrap{display:grid;grid-template-columns:2.2fr 1fr 1fr;gap:2.2rem}
footer.siteftr h4{color:#fff;font-size:.74rem;text-transform:uppercase;letter-spacing:.1em;margin:0 0 .65rem;font-weight:700}
footer.siteftr a{color:#c1d6d2}footer.siteftr a:hover{color:#fff}
footer.siteftr .fineprint{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.13);margin-top:1.1rem;padding-top:1.1rem;color:#7c918d;font-size:.78rem}
@media(max-width:760px){ footer.siteftr .wrap{grid-template-columns:1fr;gap:1.4rem} .hero h1{font-size:1.7rem} }