@import url('https://fonts.googleapis.com/css2?family=Exo+2:wght@200;300;400;500;600;700;800&family=Share+Tech+Mono&display=swap');

:root {
  --forge: #050302;
  --iron-deep: #0a0604;
  --iron: #14100a;
  --steel: #1e1812;
  --rust: #8b2200;
  --rust-dim: rgba(139,34,0,0.1);
  --rust-border: rgba(139,34,0,0.2);
  --amber: #c05010;
  --copper: #b06030;
  --bronze: #c09040;
  --metal: #d0c0a0;
  --bright: #f0e8d8;
  --text: #806040;
  --text-bright: #c09060;
  --text-dim: #3a2010;
  --border: rgba(160,100,40,0.2);
  --glow: rgba(160,80,20,0.08);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
body{font-family:'Exo 2',sans-serif;background:var(--forge);color:var(--text);min-height:100vh;overflow-x:hidden;}
#fe-canvas{position:fixed;inset:0;z-index:0;pointer-events:none;}
body::before{content:'Fe';position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);font-family:'Share Tech Mono',monospace;font-size:45vw;font-weight:700;opacity:0.02;z-index:1;pointer-events:none;color:var(--amber);}
.wrap{position:relative;z-index:2;max-width:1040px;margin:0 auto;padding:0 28px 90px;}

/* ── HERO ── */
.hero{padding:64px 0 52px;display:grid;grid-template-columns:1fr 240px;gap:40px;align-items:center;border-bottom:1px solid var(--border);margin-bottom:56px;}
.hero-tag{font-family:'Share Tech Mono',monospace;font-size:0.58rem;letter-spacing:4px;text-transform:uppercase;color:var(--amber);opacity:0.6;margin-bottom:14px;}
.hero h1{font-size:clamp(3.5rem,11vw,8rem);font-weight:800;line-height:0.85;color:var(--bright);letter-spacing:-2px;text-transform:uppercase;}
.hero h1 em{display:block;font-size:0.22em;font-style:normal;font-weight:300;letter-spacing:5px;color:var(--text-dim);margin-top:12px;font-family:'Share Tech Mono',monospace;text-transform:uppercase;}
.hero-desc{font-size:0.95rem;line-height:1.85;color:var(--text);font-weight:300;margin-top:18px;}

/* ── Periodic card (iron smelting aesthetic) ── */
.periodic-card{width:220px;height:220px;background:linear-gradient(135deg,#0f0905,#1e160e);border:1px solid rgba(160,100,40,0.3);border-radius:6px;padding:18px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden;box-shadow:0 0 30px rgba(160,80,20,0.1);}
.periodic-card::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 35% 35%,rgba(180,100,30,0.1),transparent 60%);}
.pc-num{font-family:'Share Tech Mono',monospace;font-size:0.85rem;color:rgba(180,100,30,0.6);font-weight:500;}
.pc-symbol{font-family:'Share Tech Mono',monospace;font-size:5rem;font-weight:700;color:var(--bright);line-height:1;text-align:center;text-shadow:0 0 20px rgba(180,100,30,0.3);}
.pc-name{font-size:0.8rem;font-weight:600;color:var(--bronze);text-align:center;letter-spacing:2px;text-transform:uppercase;}
.pc-mass{font-family:'Share Tech Mono',monospace;font-size:0.72rem;color:rgba(180,100,30,0.4);text-align:right;}

/* ── Props ── */
.props-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));border:1px solid var(--border);overflow:hidden;margin-bottom:56px;}
.prop{padding:18px 14px;background:var(--iron-deep);border-right:1px solid var(--border);transition:background 0.2s;}
.prop:last-child{border-right:none;} .prop:hover{background:var(--glow);}
.p-label{font-family:'Share Tech Mono',monospace;font-size:0.52rem;letter-spacing:2px;text-transform:uppercase;color:var(--amber);opacity:0.55;margin-bottom:7px;}
.p-value{font-size:1.05rem;font-weight:700;color:var(--metal);line-height:1.1;}
.p-unit{font-size:0.6rem;color:var(--text-dim);}

/* ── Sections ── */
.section{margin-bottom:54px;opacity:0;transform:translateY(18px);transition:opacity 0.65s,transform 0.65s;}
.section.visible{opacity:1;transform:none;}
.sh{display:flex;align-items:baseline;gap:14px;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--border);}
.sn{font-family:'Share Tech Mono',monospace;font-size:0.55rem;letter-spacing:3px;color:var(--amber);opacity:0.4;}
.section h2{font-size:1.5rem;font-weight:700;color:var(--bright);text-transform:uppercase;letter-spacing:1px;}
p{font-size:0.95rem;line-height:1.85;color:var(--text);font-weight:300;margin-bottom:14px;}
strong{color:var(--text-bright);font-weight:600;}

/* ── Allotropes of iron ── */
.iron-forms{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px;margin-top:18px;}
.icard{background:var(--iron);border:1px solid var(--border);border-top:2px solid var(--amber);padding:18px;transition:background 0.2s;}
.icard:hover{background:var(--glow);}
.icard h3{font-family:'Share Tech Mono',monospace;font-size:0.82rem;color:var(--metal);margin-bottom:4px;}
.icard .temp{font-size:0.62rem;color:var(--amber);letter-spacing:1px;margin-bottom:8px;font-weight:600;}
.icard p{font-size:0.78rem;margin:0;line-height:1.5;}

/* ── Transition metals periodic block ── */
.d-block{overflow-x:auto;margin-top:18px;}
.d-block-grid{display:grid;grid-template-columns:repeat(10,minmax(62px,1fr));gap:4px;min-width:640px;}
.d-elem{background:var(--iron);border:1px solid var(--border);padding:8px 6px;text-align:center;border-radius:3px;transition:background 0.2s,border-color 0.2s;cursor:default;}
.d-elem:hover{background:rgba(180,100,30,0.15);border-color:rgba(180,100,30,0.4);}
.d-elem.fe{background:rgba(180,100,30,0.2);border-color:var(--amber);}
.d-elem .sym{font-family:'Share Tech Mono',monospace;font-size:0.85rem;font-weight:700;color:var(--bright);display:block;}
.d-elem .num{font-size:0.52rem;color:var(--text-dim);display:block;}
.d-elem .name{font-size:0.5rem;color:var(--text);display:block;margin-top:1px;}

/* ── Uses grid ── */
.uses-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin-top:18px;}
.use-card{background:var(--iron);border:1px solid var(--border);border-left:2px solid var(--rust);padding:16px;transition:border-left-color 0.2s;}
.use-card:hover{border-left-color:var(--amber);}
.use-card h3{font-size:0.8rem;font-weight:700;color:var(--text-bright);text-transform:uppercase;letter-spacing:0.5px;margin-bottom:6px;}
.use-card p{font-size:0.78rem;margin:0;line-height:1.5;}

/* ── Oxidation states ── */
.ox-row{display:grid;grid-template-columns:80px 1fr;gap:14px;padding:12px 0;border-bottom:1px solid var(--border);align-items:center;}
.ox-row:last-child{border-bottom:none;}
.ox-state{font-family:'Share Tech Mono',monospace;font-size:1.1rem;font-weight:700;color:var(--amber);}
.ox-desc{font-size:0.84rem;color:var(--text);line-height:1.55;}

/* ── Discovery ── */
.disc-box{background:var(--iron);border:1px solid var(--border);border-left:2px solid var(--amber);padding:24px 26px;margin-top:18px;}
.disc-box h3{font-family:'Share Tech Mono',monospace;font-size:0.78rem;color:var(--metal);margin-bottom:10px;text-transform:uppercase;letter-spacing:1px;}
.disc-box p{margin:0 0 10px;} .disc-box p:last-child{margin:0;}

.footer-band{margin-top:70px;border-top:1px solid var(--border);padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;}
.footer-band span{font-family:'Share Tech Mono',monospace;font-size:0.5rem;letter-spacing:2px;color:var(--text-dim);text-transform:uppercase;}
@media(max-width:640px){.hero{grid-template-columns:1fr;} .periodic-card{width:160px;height:160px;margin:0 auto;}}