/* Prometheus Prototyping — shared stylesheet
   Palette: obsidian blue-black / midnight navy / warm ivory / titanium grey / champagne gold / signal amber */

:root{
  --base:#0b1220;          /* Obsidian Blue-Black */
  --surface:#0f2438;       /* Midnight Navy */
  --elev:#12293f;
  --line:rgba(110,122,136,.20);
  --line-strong:rgba(198,161,91,.34);
  --text:#f2ede3;          /* Warm Ivory */
  --body:rgba(242,237,227,.72);
  --muted:#6e7a88;         /* Titanium Grey */
  --dim:#4e5a66;
  --gold:#c6a15b;          /* Champagne Gold */
  --platinum:#b8c0c8;      /* Platinum Silver */
  --signal:#c05621;        /* Signal Amber — CTA isolate only */
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --mono:'JetBrains Mono',ui-monospace,monospace;
  --maxw:1180px;
  --radius:8px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--base);color:var(--text);font-family:var(--sans);
  line-height:1.55;-webkit-font-smoothing:antialiased;min-height:100dvh;overflow-x:hidden;
  padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(1.1rem,4vw,2.5rem)}
.mono{font-family:var(--mono)}

/* Header */
.site-header{position:sticky;top:0;z-index:40;background:linear-gradient(180deg,rgba(11,18,32,.95),rgba(11,18,32,.72));backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px;gap:1rem}
.brand{display:flex;align-items:center;gap:.75rem;font-weight:700;letter-spacing:.06em;font-size:.9rem}
.brand .mk{width:30px;height:30px;flex:none}
.brand small{display:block;font:400 .55rem/1 var(--mono);color:var(--muted);letter-spacing:.24em}
.navlinks{display:flex;gap:2.2rem;font-size:.8rem;color:var(--muted);letter-spacing:.05em;text-transform:uppercase}
.navlinks a{position:relative;padding:.2rem 0}
.navlinks a::after{content:"";position:absolute;left:0;bottom:-4px;width:0;height:1px;background:var(--gold);transition:width .25s}
.navlinks a:hover{color:var(--text)}
.navlinks a:hover::after,.navlinks a[aria-current="page"]::after{width:100%}
.navlinks a[aria-current="page"]{color:var(--text)}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.55rem;font:600 .78rem var(--sans);letter-spacing:.06em;padding:.8rem 1.35rem;border-radius:5px;border:1px solid var(--line-strong);color:var(--text);text-transform:uppercase;transition:.2s;white-space:nowrap;cursor:pointer;background:transparent}
.btn:hover{border-color:var(--gold);color:var(--gold)}
.btn.cta{background:var(--signal);border-color:var(--signal);color:#160a04}
.btn.cta:hover{box-shadow:0 0 0 4px rgba(192,86,33,.22);color:#160a04}
.btn-row{display:flex;gap:.9rem;flex-wrap:wrap;margin-top:2.2rem}

/* Section basics */
.section{padding:clamp(3.5rem,8vw,6.5rem) 0}
.eyebrow{font:500 .7rem var(--mono);letter-spacing:.32em;color:var(--gold);text-transform:uppercase;margin-bottom:1.4rem}
.kick{font:500 .7rem var(--mono);letter-spacing:.28em;color:var(--gold);text-transform:uppercase;margin-bottom:1rem}
h1{font-size:clamp(2.4rem,6.2vw,4.6rem);line-height:1;letter-spacing:-.035em;font-weight:800;max-width:16ch}
h1 .out{-webkit-text-stroke:1.2px var(--platinum);color:transparent}
h2{font-size:clamp(1.7rem,3.8vw,2.7rem);letter-spacing:-.03em;font-weight:700;max-width:22ch;line-height:1.06}
h3{font-size:1.12rem;font-weight:650;letter-spacing:-.01em}
.lede{margin-top:1.7rem;font-size:clamp(1rem,1.7vw,1.18rem);color:var(--body);max-width:38rem;font-weight:300}
p.body{color:var(--body);font-weight:300}

/* Hero */
.hero{position:relative;padding:clamp(3rem,8vw,6rem) 0 clamp(3rem,7vw,5rem);overflow:hidden}
.hero::before{content:"";position:absolute;top:40%;right:-12%;width:min(720px,66vw);height:min(720px,66vw);background:radial-gradient(circle,rgba(198,161,91,.10),transparent 62%);pointer-events:none}
.hero-in{position:relative;z-index:2}
.meta{margin-top:2.8rem;display:flex;gap:2.4rem;flex-wrap:wrap;font:400 .7rem var(--mono);color:var(--muted);letter-spacing:.08em;text-transform:uppercase}
.meta b{display:block;color:var(--text);font-family:var(--sans);font-size:1.1rem;font-weight:700;letter-spacing:0;margin-top:.3rem}

/* Grid & cards */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:1.2rem;margin-top:2.8rem}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:1.7rem 1.5rem;background:linear-gradient(170deg,var(--surface),transparent);transition:.25s;position:relative;overflow:hidden}
.card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.card .n{font:700 1.9rem/1 var(--sans);color:rgba(110,122,136,.30);letter-spacing:-.04em}
.card h3{margin:.6rem 0 .55rem}
.card p{font-size:.86rem;color:var(--body);font-weight:300}
.card .bar{position:absolute;left:0;top:0;height:2px;width:0;background:var(--gold);transition:width .4s}
.card:hover .bar{width:100%}

/* Case study */
.case{border:1px solid var(--line);border-radius:var(--radius);padding:clamp(1.7rem,4vw,2.6rem);background:var(--surface)}
.case .tag{font:500 .68rem var(--mono);letter-spacing:.16em;color:var(--gold);text-transform:uppercase;margin-bottom:1rem}
.case h3{font-size:clamp(1.2rem,2.4vw,1.6rem);font-weight:600;line-height:1.25;margin-bottom:1.2rem;max-width:32ch}
.case p{font-size:.93rem;color:var(--body);font-weight:300;margin-bottom:.85rem;max-width:60ch}
.case p b{color:var(--text);font-weight:600}
.case .out{margin-top:1.2rem;padding-top:1.2rem;border-top:1px solid var(--line);font-size:.9rem;color:var(--gold)}
.case .src{margin-top:1rem;font:400 .66rem var(--mono);color:var(--muted);letter-spacing:.08em;text-transform:uppercase}

/* CTA band */
.cta-band{position:relative;border:1px solid var(--line-strong);border-radius:var(--radius);padding:clamp(2.2rem,5.5vw,3.6rem);background:linear-gradient(135deg,var(--elev),var(--surface));overflow:hidden;display:grid;grid-template-columns:1.25fr .75fr;gap:2rem;align-items:center}
.cta-band::after{content:"";position:absolute;right:-60px;bottom:-90px;width:320px;height:320px;background:radial-gradient(circle,rgba(198,161,91,.12),transparent 65%)}
.cta-band h2{font-size:clamp(1.5rem,3.3vw,2.3rem)}
.cta-band p{color:var(--body);margin-top:1rem;font-weight:300;font-size:.95rem;max-width:38ch}
.qual{position:relative;z-index:2;font:400 .68rem/2 var(--mono);color:var(--muted);letter-spacing:.05em}
.qual b{color:var(--gold);font-weight:500}

/* Page header (interior pages) */
.page-head{padding:clamp(3rem,7vw,5rem) 0 clamp(1.5rem,3vw,2.5rem);border-bottom:1px solid var(--line)}
.page-head h1{font-size:clamp(2rem,5vw,3.4rem);font-weight:800;max-width:20ch}

/* Footer */
.site-footer{border-top:1px solid var(--line);padding:2.6rem 0;font:400 .72rem var(--mono);color:var(--muted);letter-spacing:.05em}
.footer-in{display:flex;justify-content:space-between;gap:1.2rem;flex-wrap:wrap;align-items:center}
.site-footer a{color:var(--body)}
.site-footer a:hover{color:var(--gold)}

/* Utility */
.stack>*+*{margin-top:1rem}
.center{text-align:center}
.mt0{margin-top:0}

@media(max-width:900px){
  .navlinks{display:none}
  .cta-band{grid-template-columns:1fr}
}