/* Galena — fluorite violet, silver, lavender. Dark default, light theme, reduced motion. */
:root{
  --vacuum:#1D1530;--panel:#2A1F42;--line:#3A2E55;--line2:#4B3E6A;--silver:#F4F2F7;--mute:#B3A9CA;--copper:#C3B2EE;--copper-text:#C3B2EE;
  --ground:var(--vacuum);--ink:var(--silver);--on-btn:var(--vacuum);--btn:#C3B2EE;
  --font:"Space Grotesk","Helvetica Neue",Arial,sans-serif;--mono:"Martian Mono",Menlo,Consolas,monospace;
  --r:12px;--gutter:20px;--max:1200px;
}
:root[data-theme="light"]{
  --ground:#F4F2F7;--panel:#FFFFFF;--line:#E2DCEC;--line2:#CDC4DE;--ink:#1D1530;--mute:#5E5478;--copper:#8B6FD6;--copper-text:#6A4BB5;--btn:#2A1F42;--on-btn:#F4F2F7;
}
@media (prefers-color-scheme: light){:root:not([data-theme="dark"]){--ground:#F4F2F7;--panel:#FFFFFF;--line:#E2DCEC;--line2:#CDC4DE;--ink:#1D1530;--mute:#5E5478;--copper:#8B6FD6;--copper-text:#6A4BB5;--btn:#2A1F42;--on-btn:#F4F2F7}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html[data-motion="off"]{scroll-behavior:auto}
body{margin:0;background:var(--ground);color:var(--ink);font-family:var(--font);font-size:17px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:var(--ink)}a:hover{color:var(--copper-text)}
img,svg{max-width:100%}
.skip{position:absolute;left:-999px;top:8px;background:var(--btn);color:var(--on-btn);padding:8px 12px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.mono{font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--mute)}
h1,h2,h3{margin:0;font-weight:700;letter-spacing:-.035em;line-height:1.05}
h1{font-size:clamp(44px,9vw,104px);letter-spacing:-.045em;line-height:.92}
h2{font-size:clamp(30px,4.5vw,48px)}
h3{font-size:22px}
p{margin:0}
.lead{font-size:clamp(18px,2.2vw,22px);color:var(--mute);max-width:620px}
.copper{color:var(--copper-text)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 24px;border-radius:var(--r);background:var(--btn);color:var(--on-btn);font-weight:700;font-size:17px;text-decoration:none;border:0;cursor:pointer;font-family:inherit}
.btn:hover{color:var(--on-btn);opacity:.92}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line2)}
.btn.ghost:hover{color:var(--ink);border-color:var(--ink)}
.btn.sm{min-height:44px;padding:0 16px;font-size:15px}
.hairline{height:1px;background:var(--line)}
/* header */
.hdr{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--ground) 92%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:68px}
.hide-m{display:none}
@media(min-width:960px){.hide-m{display:inline-flex}}
.t-light,.m-off{display:none}
:root[data-theme="light"] .t-dark{display:none}:root[data-theme="light"] .t-light{display:inline}
@media (prefers-color-scheme: light){:root:not([data-theme="dark"]) .t-dark{display:none}:root:not([data-theme="dark"]) .t-light{display:inline}}
html[data-motion="off"] .m-on{display:none}html[data-motion="off"] .m-off{display:inline}
.tbtn{font-family:var(--font);font-size:13px;letter-spacing:0;text-transform:none;font-weight:700;padding:0 12px}
@media(max-width:959px){.tbtn#themeBtn,.tbtn#motionBtn{display:none}.drawer .tools2{display:flex;gap:8px;padding:14px var(--gutter)}}
.sticky{position:fixed;left:0;right:0;bottom:0;z-index:40;display:flex;gap:10px;padding:10px var(--gutter);background:color-mix(in srgb,var(--ground) 94%,transparent);backdrop-filter:blur(10px);border-top:1px solid var(--line)}
.btn{white-space:nowrap}
.sticky .btn{flex:1 1 auto;min-height:48px;padding:0 14px;font-size:clamp(15px,4.3vw,17px)}
.sticky .btn.ghost{flex:0 0 auto;padding:0 18px}
.sticky .btn.ic{width:48px;padding:0}
@media(min-width:960px){.sticky{display:none}}
body{padding-bottom:76px}@media(min-width:960px){body{padding-bottom:0}}
.near-wrap{display:grid;gap:28px}
.area-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;width:100%}
@media(min-width:720px){.area-grid{grid-template-columns:repeat(7,1fr)}}
.atile{aspect-ratio:1;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:10px;display:flex;flex-direction:column;justify-content:space-between;text-decoration:none;color:var(--ink);transition:border-color .15s}
.atile:hover{border-color:var(--copper)}
.atile .num{font-family:var(--mono);font-size:10px;color:var(--mute);letter-spacing:.1em}
.atile .sym{font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:-.04em;line-height:1}
.atile .nm{font-family:var(--mono);font-size:9px;letter-spacing:.06em;text-transform:uppercase;color:var(--mute);line-height:1.3}
.atile.hub{background:var(--copper);border-color:var(--copper);color:#1D1530}
.atile.hub .num,.atile.hub .nm{color:#1D1530;opacity:.75}
.legend-box{margin-bottom:18px}
.family{margin-top:22px}
.fam-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.fam-head h3{font-size:18px}
.swatch{width:14px;height:14px;border-radius:4px;display:inline-block}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:22px;letter-spacing:-.035em}
.brand svg{width:34px;height:34px}
.nav{display:none;gap:22px;align-items:center;font-weight:700;font-size:15px}
.nav a{text-decoration:none}
.tools{display:flex;gap:8px;align-items:center}
.tbtn{min-height:40px;min-width:40px;padding:0 10px;border-radius:10px;border:1px solid var(--line2);background:transparent;color:var(--ink);font-family:var(--mono);font-size:12px;letter-spacing:.08em;cursor:pointer;display:inline-flex;align-items:center;gap:6px}
.tbtn[aria-pressed="true"]{background:var(--panel);border-color:var(--ink)}
.menu-btn{display:inline-flex;justify-content:center;align-items:center;width:40px;height:40px;min-width:40px;padding:0}
.menu-btn svg{display:block}
@media(min-width:960px){.nav{display:flex}.menu-btn{display:none}}
.drawer{display:none;border-top:1px solid var(--line);background:var(--ground)}
.drawer.open{display:block}
.drawer a{display:block;padding:14px var(--gutter);text-decoration:none;font-weight:700;border-bottom:1px solid var(--line)}
/* hero */
.hero{position:relative;overflow:hidden;padding:56px 0 40px}
.hero .wrap{position:relative;z-index:1;display:flex;flex-direction:column;gap:22px}
.hero-text{display:flex;flex-direction:column;gap:22px;position:relative;z-index:1}
@media(min-width:960px){
  .hero{padding:88px 0 56px}
  .hero .wrap{gap:36px}
  .stats{grid-column:1 / -1;margin-top:0}
}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}
@media(min-width:960px){.stats{grid-template-columns:repeat(4,1fr);gap:20px}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.stat .n{font-family:var(--mono);font-size:32px;font-weight:500;letter-spacing:-.02em;line-height:1.25;min-height:1.25em}
.stat .n .mono{white-space:nowrap;letter-spacing:.08em}
.stat p{font-size:14px;color:var(--mute);margin-top:4px}
.dot{display:inline-block;width:12px;height:12px;border-radius:50%;background:var(--copper)}
/* sections */
section{padding:56px 0}
.sec-head{display:flex;flex-direction:column;gap:10px;margin-bottom:28px}
.steps{display:grid;gap:14px}
@media(min-width:760px){.steps{grid-template-columns:repeat(3,1fr);gap:20px}}
.step .k{font-family:var(--mono);font-size:14px;display:inline-flex;width:36px;height:36px;align-items:center;justify-content:center;border:1px solid var(--line2);border-radius:10px;margin-bottom:12px}
/* periodic table of trades */
.table{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
@media(min-width:560px){.table{grid-template-columns:repeat(4,1fr)}}
@media(min-width:900px){.table{grid-template-columns:repeat(6,1fr);gap:12px}}
@media(min-width:1160px){.table{grid-template-columns:repeat(8,1fr)}}
.tile{aspect-ratio:1;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:10px;display:flex;flex-direction:column;justify-content:space-between;text-decoration:none;color:var(--ink);position:relative;transition:border-color .15s}
.tile:hover{border-color:var(--copper);color:var(--ink)}
.tile .num{font-family:var(--mono);font-size:10px;color:var(--mute);letter-spacing:.1em}
.tile .sym{font-size:clamp(26px,4vw,38px);font-weight:700;letter-spacing:-.04em;line-height:1}
.tile .nm{font-family:var(--mono);font-size:9px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute);line-height:1.3}
.tile.diy::after{content:"";position:absolute;top:10px;right:10px;width:8px;height:8px;border-radius:50%;background:var(--copper)}
.legend{display:flex;gap:16px;align-items:center;margin-top:14px;font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--mute);text-transform:uppercase}
/* diy */
.tiers{display:grid;gap:12px}
@media(min-width:760px){.tiers{grid-template-columns:repeat(3,1fr)}}
.tier{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:18px;display:flex;flex-direction:column;gap:8px}
.tier.best{border-color:var(--copper)}
.tier .tl{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--mute)}
.tier.best .tl{color:var(--copper-text)}
.tier .pn{font-weight:700;font-size:18px;letter-spacing:-.02em}
.tier .pr{font-family:var(--mono);font-size:13px;color:var(--mute)}
.tier a.btn{margin-top:auto}
.note{font-size:13px;color:var(--mute);margin-top:12px}
ol.howto{padding-left:22px;display:grid;gap:8px;margin:0}
ul.look{list-style:none;padding:0;margin:0;display:grid;gap:10px}
ul.look li{padding-left:22px;position:relative}
ul.look li::before{content:"";position:absolute;left:0;top:10px;width:10px;height:10px;border-radius:50%;background:var(--copper)}
.two{display:grid;gap:20px}
@media(min-width:900px){.two{grid-template-columns:1fr 1fr;gap:28px}}
/* form */
form.req{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:20px;display:grid;gap:14px;max-width:640px}
label{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--mute);display:grid;gap:6px}
input,select,textarea{width:100%;min-height:48px;padding:10px 12px;border:1px solid var(--line2);border-radius:10px;background:var(--ground);color:var(--ink);font-family:var(--font);font-size:16px}
textarea{min-height:90px;resize:vertical}
.consent{display:flex;gap:10px;align-items:flex-start;font-family:var(--font);font-size:13px;text-transform:none;letter-spacing:0;color:var(--mute);line-height:1.45}
.consent input{width:20px;height:20px;min-height:0;margin:2px 0 0;accent-color:var(--copper);flex-shrink:0}
.spin{display:none;width:28px;height:28px;margin:0 auto}
form.busy .spin{display:block}
/* faq */
details{border-top:1px solid var(--line);padding:14px 0}
details:last-child{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:700;font-size:18px;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::after{content:"+";font-family:var(--mono);color:var(--mute)}
details[open] summary::after{content:"–"}
details p{margin-top:10px;color:var(--mute)}
/* footer */
footer{border-top:1px solid var(--line);padding:40px 0;color:var(--mute);font-size:14px}
footer .cols{display:grid;gap:24px}
@media(min-width:760px){footer .cols{grid-template-columns:2fr 1fr 1fr 1fr}}
footer a{color:var(--mute);text-decoration:none;display:block;padding:4px 0}
footer a:hover{color:var(--ink)}
.crumbs{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--mute);display:flex;gap:8px;flex-wrap:wrap;padding:18px 0 0}
.crumbs a{color:var(--mute);text-decoration:none}
.page-head{padding:28px 0 8px;display:flex;flex-direction:column;gap:12px}
.sym-big{display:inline-flex;align-items:center;gap:14px}
.sym-big .sq{width:64px;height:64px;border-radius:12px;background:var(--panel);border:1px solid var(--copper);display:flex;align-items:center;justify-content:center;font-size:30px;font-weight:700;letter-spacing:-.04em}
.prose{max-width:720px;display:grid;gap:14px}
.prose h2{font-size:26px;margin-top:18px}
.prose ul{margin:0;padding-left:22px}
.grid3{display:grid;gap:14px}
@media(min-width:760px){.grid3{grid-template-columns:repeat(3,1fr)}}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border:1px solid var(--line2);border-radius:10px;text-decoration:none;font-size:14px;font-weight:700}
.chip b{font-family:var(--mono);font-weight:500;font-size:12px}
/* motion */
@keyframes spin{to{transform:rotate(360deg)}}
.spin svg{animation:spin 1.2s linear infinite;transform-origin:50% 50%}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
[data-lang-hide]{display:none !important}

.fam-alkali{border-color:color-mix(in srgb,#7aa2e3 55%,var(--line))}.fam-alkali .num{color:#7aa2e3}.sq.fam-alkali{border-color:#7aa2e3}
.fam-alkaline{border-color:color-mix(in srgb,#8fb996 55%,var(--line))}.fam-alkaline .num{color:#8fb996}.sq.fam-alkaline{border-color:#8fb996}
.fam-transition{border-color:color-mix(in srgb,#e07a3f 55%,var(--line))}.fam-transition .num{color:#e07a3f}.sq.fam-transition{border-color:#e07a3f}
.fam-post{border-color:color-mix(in srgb,#b8c0cc 55%,var(--line))}.fam-post .num{color:#b8c0cc}.sq.fam-post{border-color:#b8c0cc}
.fam-metalloid{border-color:color-mix(in srgb,#b89ad8 55%,var(--line))}.fam-metalloid .num{color:#b89ad8}.sq.fam-metalloid{border-color:#b89ad8}
.fam-nonmetal{border-color:color-mix(in srgb,#e3a26b 55%,var(--line))}.fam-nonmetal .num{color:#e3a26b}.sq.fam-nonmetal{border-color:#e3a26b}
.fam-noble{border-color:color-mix(in srgb,#9fd3c7 55%,var(--line))}.fam-noble .num{color:#9fd3c7}.sq.fam-noble{border-color:#9fd3c7}
.fam-lanthanide{border-color:color-mix(in srgb,#d98c9c 55%,var(--line))}.fam-lanthanide .num{color:#d98c9c}.sq.fam-lanthanide{border-color:#d98c9c}
.fam-actinide{border-color:color-mix(in srgb,#c2b280 55%,var(--line))}.fam-actinide .num{color:#c2b280}.sq.fam-actinide{border-color:#c2b280}.nav a,.tbtn,.brand{white-space:nowrap}
.nav{gap:18px;font-size:14px}
@media(min-width:960px) and (max-width:1199px){.hide-m{display:none}}

/* band */
.band{padding:0 0 56px}
.band-in{border:1px solid var(--line);background:var(--panel);border-radius:20px;padding:clamp(32px,6vw,72px);display:flex;flex-direction:column;gap:18px;align-items:flex-start}
.big2{font-size:clamp(40px,7vw,88px);letter-spacing:-.05em;line-height:.9}
.band-in p{font-size:20px;color:var(--mute)}

html[data-motion="off"] .spin svg{animation:none}
@media (prefers-reduced-motion: reduce){html:not([data-motion="on"]) .spin svg{animation:none}}
@media(max-width:559px){.band-in{padding:28px 24px}.big2{font-size:clamp(28px,8.6vw,40px)}}
/* safety alerts on trade pages */
:root{--alert:#FF9B8F;--alert-bg:rgba(255,120,105,.08)}
:root[data-theme="light"]{--alert:#B42318;--alert-bg:#FDF0EE}
@media (prefers-color-scheme: light){:root:not([data-theme="dark"]){--alert:#B42318;--alert-bg:#FDF0EE}}
.alert{margin-top:8px;border:1px solid var(--alert);background:var(--alert-bg);border-radius:var(--r);padding:16px 18px;display:grid;gap:8px}
.alert-k{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--alert);font-weight:700}
.alert ul{margin:0;padding-left:20px;display:grid;gap:6px}
.alert a{color:var(--ink);font-weight:700}
/* let tiles shrink and long names wrap on very small screens */
.tile,.atile{min-width:0}
.tile .nm,.atile .nm{overflow-wrap:anywhere;hyphens:auto}