:root{
  --bg:#0A1628; --bg2:#0E1D35; --card:#132544; --card2:#182D52; --line:rgba(214,222,235,.12); --line2:rgba(214,222,235,.24);
  --fg:#E4E8F0; --muted:#9AA7BD; --faint:#6F7D95;
  --gold:#C9A553; --gold2:#E2C26E; --gold-ink:#0A1628;
  --shadow:0 10px 30px rgba(0,0,0,.35); --hero:#16325c;
  --display:"Outfit",ui-sans-serif,system-ui,"Segoe UI",sans-serif;
  --body:"IBM Plex Sans",ui-sans-serif,system-ui,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  color-scheme:dark;
}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]):not([data-palette]){
    --bg:#F2F4F7; --bg2:#E9ECF2; --card:#FFFFFF; --card2:#F6F7FA; --line:rgba(10,22,40,.12); --line2:rgba(10,22,40,.24);
    --fg:#0F1B2E; --muted:#4F5D74; --faint:#7D8AA0; --gold:#9A7A2E; --gold2:#7E6220; --gold-ink:#FFFFFF;
    --shadow:0 10px 30px rgba(10,22,40,.10); --hero:#DCE3EE; color-scheme:light;
  }
}
:root[data-palette="teal"]{--bg:#041A1F;--bg2:#0B2B45;--card:#0F3347;--card2:#154055;--line:rgba(217,226,232,.12);--line2:rgba(217,226,232,.24);--fg:#D9E2E8;--muted:#9DB3BF;--faint:#6F8792;--gold:#F0B86E;--gold2:#F6CB8B;--gold-ink:#041A1F;--shadow:0 10px 30px rgba(0,0,0,.4);--hero:#154055;color-scheme:dark}
:root[data-palette="parchment"]{--bg:#FFFCF2;--bg2:#F3EFE4;--card:#FFFFFF;--card2:#F7F3EA;--line:rgba(37,36,34,.12);--line2:rgba(37,36,34,.26);--fg:#252422;--muted:#5A5650;--faint:#8A857C;--gold:#EB5E28;--gold2:#C94A1A;--gold-ink:#FFFCF2;--shadow:0 10px 30px rgba(37,36,34,.10);--hero:#F3EFE4;color-scheme:light}
:root[data-palette="amber"]{--bg:#000000;--bg2:#0D1526;--card:#14213D;--card2:#1B2B4D;--line:rgba(229,229,229,.14);--line2:rgba(229,229,229,.28);--fg:#FFFFFF;--muted:#C9CED8;--faint:#8A93A6;--gold:#FCA311;--gold2:#FFB84D;--gold-ink:#000000;--shadow:0 10px 30px rgba(0,0,0,.5);--hero:#1B2B4D;color-scheme:dark}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--body);font-size:15.5px;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--gold2)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{font-family:var(--display);line-height:1.15;text-wrap:balance;margin:0}
p{margin:0}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
.gut{padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.in{max-width:1180px;margin:0 auto}
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold)}
header.top{position:sticky;top:0;z-index:20;background:var(--bg2);border-bottom:1px solid var(--line2)}
header.top .in{display:flex;align-items:center;gap:18px;padding-block:10px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--fg)}
.brand img{width:44px;height:44px;object-fit:contain}
.brand b{font-family:var(--display);font-weight:600;font-size:18px;letter-spacing:.01em;display:block;line-height:1.05}
.brand small{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold)}
nav.main{display:flex;gap:6px;flex-wrap:wrap;margin-left:auto}
nav.main a{display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border:1px solid var(--line2);border-radius:10px;font-family:var(--display);font-weight:500;font-size:13.5px;letter-spacing:.07em;text-transform:uppercase;text-decoration:none;color:var(--muted);transition:background .15s,color .15s,border-color .15s}
nav.main a:hover{color:var(--fg);border-color:var(--gold)}
nav.main a[aria-current="page"]{background:var(--gold);border-color:var(--gold);color:var(--gold-ink)}
nav.main a.legal{border-style:dashed}
.pal{display:inline-flex;gap:4px;padding:4px;border-radius:999px;border:1px solid var(--line2);background:color-mix(in srgb,var(--card) 70%,transparent);flex-wrap:wrap}
.pal button{display:inline-flex;align-items:center;gap:6px;padding:5px 10px 5px 6px;border-radius:999px;font-size:12px;font-weight:500;color:var(--muted)}
.pal button[aria-pressed="true"]{background:var(--card2);color:var(--fg);box-shadow:inset 0 0 0 1px var(--gold)}
.pal .sw{display:inline-grid;grid-template-columns:repeat(3,7px);gap:1px;border-radius:4px;overflow:hidden}
.pal .sw i{display:block;width:7px;height:14px}
main{padding-block:26px 40px}
.page{display:none}.page.on{display:block}
.lede{color:var(--muted);max-width:68ch}
.sk{display:grid;gap:10px;margin-block:18px 14px}
.sk .row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.sk button{display:flex;flex-direction:column;align-items:flex-start;gap:3px;text-align:left;padding:12px 14px;border:1px solid var(--line2);border-radius:12px;background:var(--card);min-width:0;transition:border-color .15s,transform .15s,background .15s}
.sk button:hover{border-color:var(--gold);transform:translateY(-1px)}
.sk button i{font-style:normal;font-family:var(--mono);font-size:11px;color:var(--gold);letter-spacing:.1em}
.sk button b{font-family:var(--display);font-weight:600;font-size:15.5px;line-height:1.15}
.sk button small{color:var(--muted);font-size:12px;line-height:1.3}
.sk button[aria-pressed="true"]{background:var(--gold);border-color:var(--gold);color:var(--gold-ink)}
.sk button[aria-pressed="true"] i,.sk button[aria-pressed="true"] small{color:inherit}
@media (max-width:860px){.sk .row{grid-template-columns:repeat(2,minmax(0,1fr))}}
.screen{border:1px solid var(--line2);border-radius:18px;background:var(--card);box-shadow:var(--shadow);overflow:hidden}
.screen .sh{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:20px 24px;background:radial-gradient(900px 260px at 0% 0%,var(--hero),transparent 70%),var(--bg2);border-bottom:1px solid var(--line)}
.screen .sh h2{font-size:clamp(24px,3.4vw,34px);font-weight:600}
.screen .sh .eyebrow{display:block;margin-bottom:6px}
.screen .sh .ic{display:flex;gap:8px;margin-left:auto}
.screen .sh .ic img{width:48px;height:48px;object-fit:contain}
.screen .sb{padding:24px;display:grid;gap:22px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr));gap:12px}
.tile{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:var(--bg2);min-width:0;display:grid;gap:6px;align-content:start}
.tile h4{font-size:16px;font-weight:600}
.tile p,.tile li{color:var(--muted);font-size:14px}
.tile ul{margin:0;padding-left:18px;display:grid;gap:3px}
.formula{font-family:var(--mono);font-size:14px;padding:14px 16px;border-radius:12px;border:1px solid var(--line2);background:var(--bg);overflow-x:auto;color:var(--fg)}
.formula b{color:var(--gold2);font-weight:500}
.todo{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border:1px dashed var(--line2);border-radius:12px;color:var(--muted);font-size:13.5px}
.todo b{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--gold);white-space:nowrap;padding-top:2px}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,150px),1fr));gap:8px;counter-reset:s}
.steps div{border:1px solid var(--line);border-radius:11px;background:var(--bg2);padding:10px 12px;font-size:13px;color:var(--muted);counter-increment:s}
.steps div::before{content:"Stage " counter(s);display:block;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--gold);margin-bottom:3px}
.steps div b{display:block;color:var(--fg);font-family:var(--display);font-size:14px;font-weight:600}
table{border-collapse:collapse;width:100%;font-size:13.5px}
th,td{text-align:left;padding:9px 11px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--gold);font-weight:500;background:var(--bg2)}
td{color:var(--muted)}td:first-child{color:var(--fg);font-weight:500}
.tw{overflow-x:auto;border:1px solid var(--line);border-radius:12px}
.tw table{min-width:560px}
.pn{display:flex;justify-content:space-between;gap:10px;padding:14px 24px;border-top:1px solid var(--line);background:var(--bg2)}
.pn button{padding:8px 14px;border:1px solid var(--line2);border-radius:10px;font-size:13px;color:var(--muted)}
.pn button:hover{border-color:var(--gold);color:var(--fg)}
.pn button:disabled{opacity:.35;pointer-events:none}
.vbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:10px 0}
.vbar b{font-family:var(--display);font-weight:600;font-size:16px}
.vbar .vhint{color:var(--faint);font-size:12.5px}
.vbar a{margin-left:auto;font-size:13px}
.vbar button{padding:9px 16px;border-radius:10px;background:var(--gold);color:var(--gold-ink);font-family:var(--display);font-weight:600;font-size:14px}
#vframe{display:block;width:100%;height:calc(100vh - 150px);min-height:480px;border:1px solid var(--line2);border-radius:14px;background:#fff}
footer{border-top:1px solid var(--line);background:var(--bg2);padding-block:22px;color:var(--muted);font-size:13px}
footer .in{display:flex;gap:18px;flex-wrap:wrap;justify-content:space-between;align-items:center}
footer .fl{display:flex;gap:14px;flex-wrap:wrap}
footer img{height:30px;width:auto}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}