/* HBF Platform shared design system. Corrected type scale + contrast (16px body,
   1.6 line-height, larger headings, stronger secondary text). Dark theme aligned
   with the main site and FusionSim. */
:root{
  --bg:#070512; --panel:#120c2b; --panel-2:#0b0720; --line:#2b2150;
  --text:#eae6f7; --dim:#b7aed6; --dim2:#8a80ab;
  --accent:#19c2c8; --accent-2:#7c5cff; --ok:#54c98f; --warn:#e8b339; --bad:#e05c6e;
  --req:#e8b339; --future:#8a80ab;
  font-size:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);line-height:1.6;
  font-family:system-ui,-apple-system,"Segoe UI",Inter,sans-serif;
  -webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:1100px;margin:0 auto;padding:0 20px}

/* Navigation */
.nav{position:sticky;top:0;z-index:50;background:rgba(7,5,18,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:16px;height:56px}
.nav img{height:26px}
.nav .links{display:flex;gap:14px;flex-wrap:wrap;flex:1}
.nav .links a{color:var(--dim);font-size:14px;font-weight:500}
.nav .links a.active,.nav .links a:hover{color:var(--accent)}
.nav .actions{display:flex;gap:8px}
.nav .actions a{font-size:13px;padding:7px 12px;border-radius:8px;border:1px solid var(--line);color:var(--text)}
.nav .actions a.primary{background:var(--accent);color:#03222a;border:0;font-weight:700}
.navtoggle{display:none}
@media(max-width:860px){
  .nav .links{display:none;position:absolute;top:56px;left:0;right:0;background:var(--bg);
    flex-direction:column;padding:10px 20px;border-bottom:1px solid var(--line)}
  .nav .links.open{display:flex}
  .navtoggle{display:inline-block;background:none;border:1px solid var(--line);color:var(--text);
    border-radius:8px;padding:6px 10px;cursor:pointer}
}

/* Typography scale */
main{padding:28px 0 48px}
.hero{font-size:clamp(40px,6vw,56px);line-height:1.1;font-weight:800;letter-spacing:-.02em;margin:6px 0 10px}
.lead{font-size:18px;color:var(--dim);max-width:760px}
h2{font-size:clamp(26px,3.4vw,34px);line-height:1.2;font-weight:700;margin:34px 0 12px}
h3{font-size:21px;line-height:1.3;font-weight:700;margin:0 0 6px}
h4{font-size:16px;margin:14px 0 4px;color:var(--dim)}
.kicker{font-size:13px;letter-spacing:.09em;text-transform:uppercase;color:var(--accent);font-weight:600}
.small{font-size:14px;color:var(--dim)}
.tiny{font-size:13px;color:var(--dim2)}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px}
.card .ic{font-size:24px}
.card p{color:var(--dim);font-size:15px;margin:8px 0}
.rowmeta{display:flex;flex-direction:column;gap:3px;font-size:13px;margin:8px 0}
.rowmeta b{color:var(--dim2);font-weight:500}
.cta{display:inline-block;background:var(--accent);color:#03222a;font-weight:700;
  border-radius:9px;padding:10px 16px;font-size:15px;margin-top:8px}
.cta.ghost{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.cta.lg{padding:13px 22px;font-size:16px}

/* Badges */
.badge{display:inline-block;font-size:12px;padding:2px 9px;border-radius:20px;border:1px solid var(--line);color:var(--dim);margin:2px 4px 2px 0}
.badge.ok{color:var(--ok);border-color:var(--ok)}
.badge.warn,.badge.req{color:var(--warn);border-color:var(--warn)}
.badge.bad{color:var(--bad);border-color:var(--bad)}
.badge.future{color:var(--future);border-color:var(--future)}
.badge.accent{color:var(--accent);border-color:var(--accent)}

/* Parameter-source tags */
.psrc{font-size:11px;font-weight:600;letter-spacing:.04em;padding:1px 7px;border-radius:5px;text-transform:uppercase}
.psrc.assumption{background:rgba(232,179,57,.15);color:var(--warn)}
.psrc.literature{background:rgba(124,92,255,.18);color:#b7a6ff}
.psrc.dataset{background:rgba(25,194,200,.15);color:var(--accent)}
.psrc.default{background:rgba(138,128,171,.18);color:var(--dim)}
.psrc.calibrated{background:rgba(84,201,143,.15);color:var(--ok)}

/* Tables */
table{border-collapse:collapse;width:100%;font-size:14px;margin:8px 0}
caption{text-align:left;color:var(--dim);font-size:13px;margin-bottom:4px}
td,th{border:1px solid var(--line);padding:7px 10px;text-align:left;vertical-align:top}
th{color:var(--dim);font-weight:600}
.tablewrap{overflow-x:auto}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px;word-break:break-all}

/* Panels & notes */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px;margin:14px 0}
.note{font-size:14px;color:var(--dim)}
.caveat{font-size:14.5px;color:var(--warn);border:1px dashed var(--warn);background:rgba(232,179,57,.06);
  padding:12px 14px;border-radius:10px;margin:14px 0}
.callout{border-left:3px solid var(--accent);background:var(--panel-2);padding:10px 14px;border-radius:0 8px 8px 0;margin:10px 0}

/* Verification vs validation split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:760px){.split{grid-template-columns:1fr}}
.split .box{border-radius:12px;padding:16px;border:1px solid var(--line)}
.split .box.verif{background:rgba(84,201,143,.06);border-color:rgba(84,201,143,.4)}
.split .box.valid{background:rgba(232,179,57,.06);border-color:rgba(232,179,57,.4)}

/* Hero diagram */
.flow{display:flex;flex-wrap:wrap;align-items:center;gap:8px;justify-content:center;margin:18px 0}
.flow .node{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:10px 14px;font-size:14px;font-weight:600}
.flow .arrow{color:var(--accent);font-size:18px}

/* Footer */
footer{border-top:1px solid var(--line);margin-top:30px;padding:26px 0;color:var(--dim)}
footer .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px}
footer h5{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--dim2);margin:0 0 8px}
footer a{color:var(--dim);font-size:14px;display:block;padding:2px 0}
footer .fine{margin-top:18px;font-size:13px;color:var(--dim2)}

.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:760px){.grid2{grid-template-columns:1fr}}
ul.clean{list-style:none;padding:0;margin:8px 0}
ul.clean li{padding:4px 0 4px 22px;position:relative;color:var(--dim);font-size:15px}
ul.clean li:before{content:"›";position:absolute;left:6px;color:var(--accent)}

/* ============ Futuristic UI & animations ============ */
@keyframes fadeUp { from{opacity:0;transform:translateY(18px)} to{opacity:1;transform:none} }
@keyframes aurora { 0%{transform:translate3d(-6%,-4%,0) rotate(0deg)} 50%{transform:translate3d(6%,4%,0) rotate(8deg)} 100%{transform:translate3d(-6%,-4%,0) rotate(0deg)} }
@keyframes gridpan { from{background-position:0 0} to{background-position:64px 64px} }
@keyframes shimmer { from{background-position:-200% 0} to{background-position:200% 0} }
@keyframes floaty { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-4px)} }
@keyframes glowpulse { 0%,100%{box-shadow:0 0 0 rgba(25,194,200,0)} 50%{box-shadow:0 0 22px rgba(25,194,200,.35)} }
@keyframes dash { to{stroke-dashoffset:-40} }
@keyframes spinslow { to{transform:rotate(360deg)} }

/* Animated aurora + grid background (fixed, behind everything) */
body::before{content:"";position:fixed;inset:-25%;z-index:-2;pointer-events:none;
  background:
    radial-gradient(40% 40% at 20% 25%, rgba(124,92,255,.20), transparent 60%),
    radial-gradient(38% 38% at 82% 20%, rgba(25,194,200,.16), transparent 60%),
    radial-gradient(45% 45% at 60% 90%, rgba(84,201,143,.10), transparent 60%);
  filter:blur(30px);animation:aurora 24s ease-in-out infinite}
body::after{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.06;
  background-image:linear-gradient(rgba(124,92,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(124,92,255,.6) 1px,transparent 1px);
  background-size:64px 64px;animation:gridpan 40s linear infinite}

/* Reveal-on-scroll */
.reveal{opacity:0}
.reveal.in{animation:fadeUp .6s cubic-bezier(.2,.7,.2,1) forwards}

/* Nav polish */
.nav .links a{position:relative;transition:color .2s}
.nav .links a::after{content:"";position:absolute;left:0;bottom:-4px;height:2px;width:0;background:var(--accent);transition:width .25s}
.nav .links a:hover::after,.nav .links a.active::after{width:100%}
.nav img{transition:filter .3s}.nav img:hover{filter:drop-shadow(0 0 8px rgba(25,194,200,.7))}

/* Cards: hover lift + glow + gradient sweep border */
.card{transition:transform .25s cubic-bezier(.2,.7,.2,1),box-shadow .25s,border-color .25s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;inset:0;padding:1px;border-radius:14px;background:linear-gradient(120deg,transparent,rgba(25,194,200,.5),transparent);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .3s}
.card:hover{transform:translateY(-5px);box-shadow:0 14px 40px rgba(0,0,0,.45),0 0 0 1px rgba(25,194,200,.25)}
.card:hover::before{opacity:1}
.card .ic{display:inline-block;transition:transform .3s}.card:hover .ic{transform:scale(1.12) rotate(-4deg)}

/* Hero gradient text */
.hero{background:linear-gradient(100deg,#eae6f7 20%,#8fe9ec 55%,#b7a6ff 90%);-webkit-background-clip:text;background-clip:text;color:transparent}

/* CTA shimmer */
.cta{position:relative;overflow:hidden;transition:transform .15s,box-shadow .25s}
.cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(25,194,200,.3)}
.cta::after{content:"";position:absolute;inset:0;background:linear-gradient(110deg,transparent 30%,rgba(255,255,255,.35) 50%,transparent 70%);
  background-size:200% 100%;opacity:0;transition:opacity .2s}
.cta:hover::after{opacity:1;animation:shimmer 1.1s linear}
.cta.ghost:hover{background:rgba(25,194,200,.08)}

/* Flow diagram: glowing nodes + animated connectors */
.flow .node{animation:floaty 5s ease-in-out infinite;transition:box-shadow .3s,border-color .3s}
.flow .node:nth-child(3){animation-delay:.4s}.flow .node:nth-child(5){animation-delay:.8s}
.flow .node:nth-child(7){animation-delay:1.2s}.flow .node:nth-child(9){animation-delay:1.6s}
.flow .node:hover{border-color:var(--accent);box-shadow:0 0 20px rgba(25,194,200,.4)}
.flow .arrow{animation:glowpulse 3s ease-in-out infinite}

/* Badges get a soft glow on hover */
.badge{transition:box-shadow .2s,transform .2s}.badge:hover{transform:translateY(-1px)}
.badge.ok:hover{box-shadow:0 0 12px rgba(84,201,143,.4)}
.badge.accent:hover{box-shadow:0 0 12px rgba(25,194,200,.4)}

/* Count-up stat chips */
.statrow{display:flex;gap:14px;flex-wrap:wrap;margin:14px 0}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 18px;min-width:120px;transition:transform .25s,box-shadow .25s}
.stat:hover{transform:translateY(-4px);box-shadow:0 0 24px rgba(124,92,255,.25)}
.stat .num{font-size:30px;font-weight:800;background:linear-gradient(100deg,#8fe9ec,#b7a6ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .lbl{font-size:13px;color:var(--dim)}

@media (prefers-reduced-motion: reduce){
  *,body::before,body::after{animation:none!important;transition:none!important}
  .reveal{opacity:1}
}