/* Inference Engine — public site. Hand-written; no framework, no build step. */
:root{
  --navy-deep:#21243a; --navy:#31344e; --slate:#586582; --slate-deep:#3d4d6b;
  --silver:#a8aebd; --offwhite:#f8f8fa; --amber:#c68a2a; --brown:#8b6842;
  --teal:#56778f; --teal-light:#98bcc2;
  --gradient:linear-gradient(90deg,#c68a2a 0%,#8b6842 22%,#3d4d6b 52%,#56778f 78%,#98bcc2 100%);
  --dark-bg:
    radial-gradient(1200px 600px at 50% -10%,rgba(152,188,194,.12),transparent 60%),
    radial-gradient(900px 500px at 15% 110%,rgba(198,138,42,.10),transparent 60%),
    linear-gradient(180deg,#21243a 0%,#2a2e49 50%,#21243a 100%);
  --sans:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --head:Jost,Futura,"Century Gothic",var(--sans);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;overflow-x:hidden;background:#fff;color:var(--navy-deep);font-family:var(--sans);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
.container{max-width:1120px;margin:0 auto;padding:0 24px}
.grad-text{background-image:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---- header ---- */
.site-header{position:sticky;top:0;z-index:40;background:rgba(33,36,58,.92);backdrop-filter:blur(8px);border-bottom:1px solid rgba(168,174,189,.14)}
.site-header .inner{display:flex;align-items:center;gap:16px;height:66px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:#fff;margin-right:auto}
.brand img{height:30px;width:auto}
.brand span{font-family:var(--head);font-weight:500;font-size:18px;letter-spacing:.005em;white-space:nowrap}
.site-header nav{display:flex;align-items:center;gap:26px}
.site-header nav a{color:var(--silver);text-decoration:none;font-size:14px;transition:color .18s}
.site-header nav a:hover{color:#fff}
.login-btn{display:inline-flex;align-items:center;gap:7px;border:1px solid rgba(168,174,189,.34);border-radius:999px;padding:8px 17px;color:var(--silver);text-decoration:none;font-size:14px;font-weight:500;white-space:nowrap;transition:.18s}
.login-btn:hover{color:#fff;border-color:rgba(168,174,189,.7);background:rgba(255,255,255,.04)}
@media (max-width:820px){.site-header nav{display:none}}

/* ---- shared section furniture ---- */
section{position:relative}
.dark{background:var(--dark-bg);overflow:hidden;color:#fff}
.dark::before{content:"";position:absolute;inset:0;z-index:0;opacity:.18;background-image:radial-gradient(rgba(168,174,189,.6) 1px,transparent 1.5px);background-size:28px 28px}
.dark .container{position:relative;z-index:1}
.offwhite{background:var(--offwhite)}
.pad{padding:88px 0}
.label{font-size:12px;font-weight:600;letter-spacing:.28em;text-transform:uppercase;margin:0}
h1,h2,h3{font-family:var(--head);font-weight:500;letter-spacing:-.015em;margin:0}
h2.title{font-size:clamp(28px,4vw,46px);line-height:1.1;margin-top:14px}
.beam{position:relative;height:2px;border-radius:2px;background:var(--gradient)}
.beam::after{content:"";position:absolute;inset:0;border-radius:2px;background:var(--gradient);filter:blur(6px);opacity:.6}
.center{text-align:center}
.mx-auto{margin-left:auto;margin-right:auto}
.lead{font-size:17px;line-height:1.7;color:var(--slate)}
.dark .lead{color:var(--silver)}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:8px;border-radius:999px;padding:13px 30px;font-size:14.5px;font-weight:500;text-decoration:none;white-space:nowrap;transition:transform .18s}
.btn-grad{background:var(--gradient);color:#fff;box-shadow:0 8px 22px rgba(198,138,42,.22)}
.btn-grad:hover{transform:translateY(-1px)}
.btn-ghost{border:1px solid rgba(168,174,189,.28);color:var(--silver)}
.btn-ghost:hover{color:#fff;border-color:rgba(168,174,189,.55)}

/* ---- hero ---- */
.hero{padding:104px 0 96px;text-align:center}
.hero .mark-wrap{position:relative;display:inline-block;margin-bottom:38px}
.hero .mark-wrap::before{content:"";position:absolute;inset:-18%;filter:blur(46px);opacity:.6;background:radial-gradient(closest-side,rgba(198,138,42,.35),transparent 55%),radial-gradient(closest-side at 70% 50%,rgba(152,188,194,.3),transparent 60%)}
.hero img{position:relative;height:124px;width:auto}
.hero h1{font-size:clamp(38px,6.4vw,74px);line-height:1.04;margin-top:24px;color:#fff}
.hero p{max-width:680px;margin:32px auto 0}
.hero .ctas{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:40px}
.hero .beam{max-width:420px;margin:64px auto 0}
@media (max-width:640px){.hero{padding:66px 0 62px}.hero img{height:88px}}

/* ---- prose ---- */
.prose{max-width:760px}
.prose p{margin:24px 0 0}
.prose .pull{font-size:20px;line-height:1.6;font-style:italic;color:rgba(49,52,78,.85)}

/* ---- practice stages ---- */
.stages{position:relative;max-width:1040px;margin:78px auto 0}
.stages .rail{display:none}
@media (min-width:1024px){
  .stages .rail{display:block;position:absolute;left:0;right:0;top:34px;height:3px;border-radius:2px;background:var(--gradient);opacity:.9}
  .stages .rail::after{content:"";position:absolute;inset:-4px 0;background:var(--gradient);filter:blur(9px);opacity:.35}
}
.stage-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:26px;position:relative}
.stage{text-align:center}
@media (min-width:1024px){.stage{text-align:left}}
.stage .disc{position:relative;width:68px;height:68px;border-radius:50%;background:#fff;border:1px solid;display:grid;place-items:center;margin:0 auto}
@media (min-width:1024px){.stage .disc{margin:0}}
.stage .disc::before{content:"";position:absolute;inset:0;border-radius:50%;filter:blur(9px);opacity:.35;background:currentColor}
.stage .disc svg{position:relative;width:26px;height:26px}
.stage h3{font-family:var(--sans);font-weight:600;font-size:16px;letter-spacing:0;margin-top:20px;color:var(--navy-deep)}
.stage p{font-size:14px;line-height:1.6;color:var(--slate);margin-top:8px}
.closing{max-width:640px;margin:66px auto 0;text-align:center;font-style:italic;font-size:17px;line-height:1.65;color:rgba(49,52,78,.85)}
.dark .closing{color:var(--silver)}

/* ---- platform cards ---- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:26px;max-width:900px;margin:62px auto 0}
.card{position:relative;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:30px;backdrop-filter:blur(4px);transition:background .18s}
.card:hover{background:rgba(255,255,255,.07)}
.card .edge{position:absolute;top:-1px;left:24px;right:24px;height:1px}
.card .ico{display:inline-flex;border-radius:9px;padding:11px}
.card .ico svg{width:24px;height:24px}
.card h3{font-family:var(--sans);font-weight:600;font-size:20px;letter-spacing:0;color:#fff;margin-top:16px}
.card .tag{font-size:14px;font-weight:500;margin-top:10px}
.card p.body{font-size:14px;line-height:1.65;color:var(--silver);margin-top:12px}

/* ---- footer ---- */
.site-footer{background:var(--navy-deep);color:var(--silver);text-align:center;padding:52px 0;font-size:14px}
.site-footer .wm{font-family:var(--head);font-size:19px;color:#fff}
.site-footer .tag{font-style:italic;margin-top:6px}
.site-footer a{color:var(--amber);text-decoration:none}
.site-footer a:hover{text-decoration:underline}
.site-footer .fine{margin-top:20px;font-size:12px;color:rgba(168,174,189,.6)}

/* Narrow viewports: the brand wordmark plus the login pill overflow the bar.
   Drop the wordmark (the mark still carries the brand) and tighten the pill so the
   page never scrolls horizontally. */
@media (max-width:560px){
  .brand span{display:none}
  .brand img{height:26px}
  .login-btn{padding:7px 13px;font-size:13px}
  .container{padding:0 16px}
  .pad{padding:60px 0}
}