/* WarpStack site styles — ThermStack editorial design language:
   flat/minimal, Inter only, green/blue/orange on white, thin rule separators. */

  :root{
    --bg:#ffffff; --bg-2:#f3f7f7; --surface:#ffffff; --surface-2:#f3f7f7; --wash:#f3f7f7;
    --border:#d9e2e4; --border-strong:#c3cfd1;
    --text:#172b32; --muted:#52646b; --muted-2:#6f8187;
    --cyan:#087964; --blue:#215fa4; --indigo:#ae521d;   /* green / blue / orange */
    --amber:#ae521d; --orange:#ae521d; --red:#b4452a;
    --warp:#087964;          /* legacy gradient tokens -> solid green */
    --accent-grad:#087964;
    --radius:6px; --radius-sm:5px;
    --mono:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    --maxw:1160px;
  }
  *{box-sizing:border-box; letter-spacing:0}
  html{scroll-behavior:smooth; scroll-padding-top:92px}
  body{
    margin:0; background:var(--bg); color:var(--text);
    font-family:var(--sans); font-size:16px; line-height:1.7; -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  a{color:var(--cyan); text-decoration:none}
  h1,h2,h3{line-height:1.18; margin:0; font-weight:600}
  p{margin:0}
  .wrap{max-width:var(--maxw); margin:0 auto; padding:0 28px}
  .mono{font-family:var(--mono)}
  .grad-text{color:var(--cyan); background:none}

  /* ---------- NAV ---------- */
  header.nav{
    position:sticky; top:0; z-index:50;
    background:rgba(255,255,255,.98);
    border-bottom:1px solid var(--border);
  }
  .nav-inner{display:flex; align-items:center; justify-content:space-between; height:72px}
  .brand{display:flex; align-items:center; gap:10px; font-weight:700; font-size:21px; color:var(--text)}
  .brand .dot{
    width:22px; height:22px; border-radius:5px; background:var(--cyan);
    position:relative; overflow:hidden; transform:skewY(-10deg);
  }
  .brand .dot::after{content:""; position:absolute; left:0; right:0; top:60%; height:4px; background:var(--orange); opacity:.85}
  .nav-links{display:flex; gap:32px; align-items:center}
  .nav-links a{color:var(--muted); font-size:14px; font-weight:500; transition:color .15s}
  .nav-links a:hover{color:var(--text)}
  .nav-links a.xpage::after{content:"\2197"; font-size:.85em; margin-left:3px; opacity:.7}
  .nav-cta{display:flex; align-items:center; gap:14px}
  .btn{
    display:inline-flex; align-items:center; gap:9px; cursor:pointer; border:none;
    font-family:var(--sans); font-weight:600; font-size:14px; line-height:1;
    padding:13px 22px; border-radius:5px; transition:background .2s, color .2s;
    white-space:nowrap;
  }
  .btn-primary{background:var(--cyan); color:#ffffff}
  .btn-primary:hover{background:#075b4d}
  .btn-ghost{background:transparent; color:var(--cyan); border:1px solid var(--border-strong)}
  .btn-ghost:hover{background:var(--wash)}
  .btn-lg{padding:15px 26px; font-size:15px; border-radius:5px}
  .nav-toggle{display:none; background:none; border:none; color:var(--text); cursor:pointer; padding:6px}

  /* ---------- HERO ---------- */
  .hero{position:relative; padding:56px 0 0}
  .hero-grid{display:grid; grid-template-columns:1fr; gap:34px; align-items:start}
  .eyebrow{
    display:inline-flex; align-items:center; gap:9px; font-family:var(--sans); font-size:12px;
    font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--cyan); margin-bottom:4px;
  }
  .eyebrow .pulse{display:none}
  .hero h1{font-size:clamp(34px,5vw,48px); margin:12px 0 0; font-weight:600}
  .hero p.lead{color:var(--muted); font-size:clamp(17px,1.8vw,21px); line-height:1.55; margin-top:18px; max-width:830px}
  .hero-cta{display:flex; gap:20px; margin-top:26px; flex-wrap:wrap}
  .hero-sub{margin-top:22px; display:flex; gap:22px; flex-wrap:wrap; color:var(--muted-2); font-size:13.5px}
  .hero-sub span{display:inline-flex; align-items:center; gap:7px}
  .check{color:var(--cyan)}

  /* ---------- HERO VISUAL ---------- */
  .viz-card{
    position:relative; border:1px solid var(--border); border-radius:var(--radius);
    background:#ffffff; padding:12px; overflow:hidden;
  }
  .viz-head{display:flex; align-items:center; justify-content:space-between; margin-bottom:10px; padding:2px 6px}
  .viz-title{font-family:var(--sans); font-size:12px; color:var(--muted); letter-spacing:.02em}
  .viz-dots{display:flex; gap:6px}
  .viz-dots i{width:9px; height:9px; border-radius:50%; display:inline-block; opacity:.8}
  .viz-dots i:nth-child(1){background:var(--cyan)}.viz-dots i:nth-child(2){background:var(--blue)}.viz-dots i:nth-child(3){background:var(--orange)}
  .viz-card img{display:block; width:100%; height:auto; border-radius:4px; background:#fff}
  .viz-cap{font-size:12.5px; color:var(--muted); padding:11px 6px 3px; line-height:1.5}
  .viz-cap b{color:var(--text)}

  /* ---------- STATS STRIP ---------- */
  .stats{border-top:1px solid var(--border); border-bottom:1px solid var(--border); background:var(--wash)}
  .stats-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:0}
  .stat{padding:28px 24px; border-right:1px solid var(--border)}
  .stat:last-child{border-right:none}
  .stat .num{font-family:var(--sans); font-size:clamp(26px,3.2vw,35px); font-weight:600; line-height:1.2}
  .stat .num.c1{color:var(--cyan)}.stat .num.c2{color:var(--blue)}.stat .num.c3{color:var(--cyan)}.stat .num.c4{color:var(--blue)}
  .stat .lbl{color:var(--muted); font-size:14px; margin-top:8px}

  /* ---------- SECTIONS ---------- */
  section{padding:72px 0; border-bottom:1px solid var(--border)}
  .sec-head{max-width:760px; margin-bottom:40px}
  .kicker{font-family:var(--sans); font-size:12px; font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--cyan)}
  .sec-head h2{font-size:clamp(28px,3.4vw,34px); margin-top:14px; max-width:560px}
  .sec-head p{color:var(--muted); font-size:17px; margin-top:16px}

  /* problem cards -> editorial top-rule columns */
  .cards-3{display:grid; grid-template-columns:repeat(3,1fr); gap:44px}
  .card{border:0; border-top:1px solid var(--border); border-radius:0; padding:22px 0 6px; background:transparent}
  .card .ic{
    width:auto; height:auto; border:0; background:none; display:block; margin-bottom:8px; font-size:26px;
  }
  .card h3{font-size:19px}
  .card p{color:var(--muted); font-size:15px; margin-top:10px}

  /* feature grid -> editorial top-rule columns */
  .features{display:grid; grid-template-columns:repeat(3,1fr); gap:44px}
  .feat{border:0; border-top:1px solid var(--border); border-radius:0; padding:22px 0 6px; background:transparent}
  .feat::before{display:none}
  .feat .tag{font-family:var(--sans); font-size:11.5px; font-weight:700; color:var(--cyan); letter-spacing:.06em; text-transform:uppercase}
  .feat h3{font-size:18px; margin-top:10px; display:flex; align-items:center; gap:10px; font-weight:600}
  .feat p{color:var(--muted); font-size:15px; margin-top:10px}
  .feat .emoji{font-size:20px}

  /* technology */
  .tech-grid{display:grid; grid-template-columns:1fr 1fr; gap:50px; align-items:start}
  .pipe{display:flex; flex-direction:column; gap:14px}
  .pipe-step{
    display:flex; gap:16px; align-items:flex-start; padding:18px 0; border:0; border-top:1px solid var(--border);
    border-radius:0; background:transparent; position:relative;
  }
  .pipe-step .n{
    flex:none; width:32px; height:32px; border-radius:5px; display:grid; place-items:center;
    font-family:var(--sans); font-weight:700; font-size:15px; color:#ffffff; background:var(--cyan);
  }
  .pipe-step h4{margin:0 0 4px; font-size:16px}
  .pipe-step p{color:var(--muted); font-size:14px}
  .pipe-step::after{display:none}

  /* method / teaser cards -> ThermStack colored top-rule blocks */
  .solver{border:0; border-top:2px solid var(--border); border-radius:0; padding:22px 0 22px; background:transparent}
  a.solver{display:block; color:inherit; transition:opacity .15s ease}
  a.solver:hover{opacity:.72}
  .solver.fast{border-top-color:var(--cyan)}
  .solver.acc{border-top-color:var(--blue)}
  .solver.ai{border-top-color:var(--orange)}
  .solver .nm{font-family:var(--sans); font-weight:700; font-size:18px}
  .solver.fast .nm{color:var(--cyan)}.solver.acc .nm{color:var(--blue)}.solver.ai .nm{color:var(--orange)}
  .solver .role{font-size:11.5px; color:var(--muted-2); font-family:var(--sans); letter-spacing:.05em; text-transform:uppercase; margin-top:4px}
  .solver p{color:var(--muted); font-size:14px; margin-top:12px}
  .solver .kv{margin-top:14px; display:flex; gap:20px; font-family:var(--sans); font-size:13px}
  .solver .kv b{color:var(--text); font-size:16px}
  a.solver .go{display:inline-block; margin-top:14px; font-family:var(--sans); font-weight:600; font-size:13px; color:var(--cyan)}
  .eqbox{
    margin-top:8px; border:1px solid var(--border); border-left:3px solid var(--blue); border-radius:var(--radius);
    padding:22px 24px; background:var(--wash);
  }
  .eqbox .label{font-family:var(--sans); font-size:11.5px; font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--orange)}
  .eqbox .why{color:var(--muted); font-size:14.5px; line-height:1.66; margin:12px 0 2px}
  .chips{display:flex; flex-wrap:wrap; gap:8px; margin-top:18px}
  .chip{font-family:var(--sans); font-size:12.5px; color:var(--muted); border:1px solid var(--border); border-radius:4px; padding:6px 11px; background:var(--wash)}
  .note{color:var(--muted-2); font-size:13px; margin-top:16px; line-height:1.65}

  /* agentic flow */
  .flowpts{list-style:none; padding:0; margin:6px 0 0; display:flex; flex-direction:column; gap:15px}
  .flowpts li{position:relative; padding-left:26px; color:var(--muted); font-size:15px; line-height:1.6}
  .flowpts li::before{content:"\2192"; position:absolute; left:0; top:0; color:var(--cyan)}
  .flowpts li b{color:var(--text)}
  .floloop{border:1px solid var(--border); border-radius:var(--radius); padding:20px; background:#ffffff}
  .floloop-head{font-family:var(--sans); font-size:11.5px; font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--muted-2); display:flex; align-items:center; gap:9px; margin-bottom:14px}
  .loopdot{width:8px; height:8px; border-radius:50%; background:var(--cyan); flex:none}
  .flonode{border:1px solid var(--border); border-radius:var(--radius-sm); padding:14px 16px; background:#ffffff}
  .flonode .ft{font-family:var(--sans); font-weight:600; font-size:13px; color:var(--cyan)}
  .flonode.engine{border-left:3px solid var(--blue)}
  .flonode.engine .ft{color:var(--blue)}
  .flonode .fd{color:var(--muted); font-size:13px; margin-top:5px; line-height:1.55}
  .floarrow{display:flex; align-items:center; gap:9px; padding:9px 0 9px 4px; color:var(--muted-2); font-size:12.5px; font-family:var(--sans)}
  .floarrow .ax{color:var(--cyan); font-size:16px; line-height:1}

  /* results */
  .res-group{margin-bottom:40px}
  .res-label{font-family:var(--sans); font-size:12px; font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--cyan); display:flex; align-items:center; gap:14px; margin:0 0 20px}
  .res-label::after{content:""; flex:1; height:1px; background:var(--border)}
  .res-label.warm{color:var(--orange)}
  .res-label.ai{color:var(--orange)}
  table.data tr.ai td{color:var(--orange); font-weight:700}
  .res-grid{display:grid; grid-template-columns:1fr 1fr; gap:24px}
  .panel{border:1px solid var(--border); border-radius:var(--radius); padding:26px; background:#ffffff}
  .panel.full{grid-column:1/-1}
  .panel{min-width:0}
  .panel .phead{display:flex; align-items:baseline; justify-content:space-between; gap:14px; margin-bottom:6px; flex-wrap:wrap}
  .panel h3{font-size:19px}
  .panel .psub{color:var(--muted); font-size:13.5px}
  .badge{font-family:var(--sans); font-weight:600; font-size:11.5px; padding:5px 10px; border-radius:4px; border:1px solid var(--border); color:var(--cyan); background:var(--wash); white-space:nowrap}
  .badge.warn{color:var(--orange)}
  .badge.ai{color:var(--orange); border-color:var(--border)}
  table.data{width:100%; border-collapse:collapse; margin-top:14px; font-size:14px; font-variant-numeric:tabular-nums}
  table.data th,table.data td{text-align:left; padding:12px 10px; border-bottom:1px solid var(--border); vertical-align:top}
  table.data th{color:var(--muted); font-weight:600; font-family:var(--sans); font-size:12px; background:var(--wash)}
  table.data td.mono{font-family:var(--sans)}
  table.data td.r,table.data th.r{text-align:right}
  table.data tr:last-child td{border-bottom:none}
  table.data tr.win td{color:var(--cyan); font-weight:700}
  .muted-tag{color:var(--muted-2); font-weight:400; font-size:.85em}
  .bars{margin-top:8px}
  .bar-row{display:grid; grid-template-columns:150px 1fr 78px; align-items:center; gap:12px; margin:13px 0}
  .bar-row .blab{font-size:13.5px; color:var(--muted)}
  .bar-track{height:12px; border-radius:3px; background:var(--wash); overflow:hidden}
  .bar-fill{height:100%; border-radius:3px; background:var(--cyan); transform-origin:left; transform:scaleX(0); transition:transform 1.1s cubic-bezier(.2,.7,.2,1)}
  .bar-row .bval{font-family:var(--sans); font-size:13.5px; text-align:right; color:var(--text)}

  /* figures (real result images) */
  .fig{border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; background:#fff; margin-top:22px}
  .fig img{display:block; width:100%; height:auto; background:#fff}
  .fig figcaption{padding:13px 18px; color:var(--muted); font-size:13px; border-top:1px solid var(--border); line-height:1.55; background:var(--surface)}
  .fig figcaption b{color:var(--text)}
  .figscroll{overflow-x:auto; overscroll-behavior-x:contain; -webkit-overflow-scrolling:touch}
  .figscroll img{min-width:660px}
  .figscroll::-webkit-scrollbar{height:8px}
  .figscroll::-webkit-scrollbar-thumb{background:rgba(120,140,150,.4); border-radius:100px}
  .fig-2{display:grid; grid-template-columns:1fr 1fr; gap:18px}
  .fig-4{display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-top:6px}
  .fig-4 .fig{margin-top:0; display:flex; flex-direction:column}
  .fig-4 .fig figcaption{flex:1}
  .fig-4 figcaption{font-size:12px; padding:11px 13px}
  .figtag.fst{color:var(--muted)}
  @media(max-width:900px){.fig-4{grid-template-columns:repeat(2,1fr)}}
  @media(max-width:520px){.fig-4{grid-template-columns:1fr}}
  .warpfig{border:1px solid var(--border); border-radius:var(--radius); padding:20px 22px 6px; margin-top:30px; background:#ffffff}
  .warpfig svg{display:block; width:100%; height:auto}
  .warpfig figcaption{color:var(--muted); font-size:13.5px; line-height:1.62; padding:14px 4px 10px; border-top:1px solid var(--border); margin-top:8px}
  .warpfig figcaption b{color:var(--text)}
  .figtag{font-family:var(--sans); font-weight:700; font-size:11px; letter-spacing:.06em; text-transform:uppercase; display:block; margin-bottom:5px}
  .figtag.f2d{color:var(--cyan)}.figtag.f3d{color:var(--blue)}.figtag.fai{color:var(--orange)}
  @media(max-width:640px){.fig-2{grid-template-columns:1fr}}

  /* CTA / contact */
  .cta-band{
    border:1px solid var(--border); border-radius:var(--radius); padding:48px 40px; text-align:center;
    position:relative; overflow:hidden; background:var(--wash);
  }
  .cta-band::before{display:none}
  .cta-band>*{position:relative; z-index:1}
  .cta-band h2{font-size:clamp(28px,3.4vw,34px); font-weight:600}
  .cta-band p{color:var(--muted); font-size:17px; margin:16px auto 26px; max-width:580px}
  .cta-btns{display:flex; gap:20px; justify-content:center; flex-wrap:wrap}
  .cta-meta{margin-top:20px; color:var(--muted-2); font-size:13.5px}

  /* footer */
  footer{border-top:1px solid var(--border); padding:40px 0 36px; margin-top:0}
  .foot-grid{display:flex; justify-content:space-between; gap:30px; flex-wrap:wrap; align-items:flex-start}
  .foot-brand{max-width:340px}
  .foot-brand p{color:var(--muted); font-size:14px; margin-top:12px}
  .foot-cols{display:flex; gap:64px; flex-wrap:wrap}
  .foot-col h5{font-family:var(--sans); font-size:11.5px; font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--muted-2); margin:0 0 14px}
  .foot-col a,.foot-col span{display:block; color:var(--muted); font-size:14px; margin-bottom:9px; transition:color .15s}
  .foot-col a:hover{color:var(--text)}
  .cite{margin-top:34px; padding-top:22px; border-top:1px solid var(--border); color:var(--muted-2); font-size:12.5px; line-height:1.75}
  .cite b{color:var(--muted)}
  .copyright{margin-top:18px; color:var(--muted-2); font-size:13px}

  /* ---------- WHITE PAPERS ---------- */
  .wp-head{padding:54px 0 6px}
  .wp-eyebrow{
    display:inline-flex; align-items:center; gap:9px; font-family:var(--sans); font-size:12px;
    font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--cyan);
  }
  .wp-eyebrow .pulse{display:none}
  .wp-head h1{font-size:clamp(28px,4vw,46px); margin:16px 0 0; max-width:900px; line-height:1.18; font-weight:600}
  .wp-head p.lead{color:var(--muted); font-size:clamp(16px,1.7vw,18px); margin-top:18px; max-width:820px}
  .wp-meta{display:flex; flex-wrap:wrap; gap:9px 20px; margin-top:22px; color:var(--muted-2); font-family:var(--sans); font-size:12.5px}
  .wp-meta span{display:inline-flex; align-items:center; gap:7px}
  .wp-meta b{color:var(--muted); font-weight:600}
  .abstract{
    border:1px solid var(--border); border-left:3px solid var(--cyan); border-radius:var(--radius);
    padding:20px 24px; background:var(--wash); margin-top:30px;
  }
  .abstract .label{font-family:var(--sans); font-size:11.5px; font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--muted-2)}
  .abstract p{color:var(--muted); font-size:15px; line-height:1.7; margin-top:11px}
  .abstract p b{color:var(--text)}

  /* series index — paper cards -> editorial top-rule rows */
  .paper-list{display:flex; flex-direction:column; gap:0}
  .paper-card{
    display:grid; grid-template-columns:70px 1fr; gap:26px; align-items:start;
    border:0; border-top:1px solid var(--border); border-radius:0; padding:30px 0; background:transparent;
    transition:opacity .15s ease;
  }
  a.paper-card{color:inherit}
  a.paper-card:hover{opacity:.72}
  .paper-no{font-family:var(--sans); font-weight:700; font-size:14px; color:var(--cyan); padding-top:4px; white-space:nowrap}
  .paper-card h3{font-size:22px; font-weight:600}
  .paper-card .ptopic{font-family:var(--sans); font-size:11.5px; font-weight:700; letter-spacing:.06em; text-transform:uppercase; color:var(--muted-2)}
  .paper-card p{color:var(--muted); font-size:14.5px; margin-top:10px; line-height:1.62}
  .paper-card .go{display:inline-block; margin-top:14px; font-family:var(--sans); font-weight:600; font-size:12.5px; color:var(--cyan)}
  @media(max-width:560px){.paper-card{grid-template-columns:1fr; gap:10px; padding:24px 0}}

  /* series navigation at the foot of a paper */
  .series-nav{display:grid; grid-template-columns:1fr 1fr; gap:18px; margin-top:16px}
  .series-nav a{border:1px solid var(--border); border-radius:var(--radius); padding:18px 20px; background:#ffffff; transition:border-color .2s ease}
  .series-nav a:hover{border-color:var(--border-strong)}
  .series-nav .dir{font-family:var(--sans); font-size:11.5px; font-weight:700; letter-spacing:.06em; text-transform:uppercase; color:var(--muted-2)}
  .series-nav .ttl{font-weight:600; font-size:15.5px; margin-top:6px; color:var(--text)}
  @media(max-width:560px){.series-nav{grid-template-columns:1fr}}

  /* reveal */
  .reveal{opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease}
  .reveal.in{opacity:1; transform:none}

  /* responsive */
  @media(max-width:900px){
    .hero-grid{grid-template-columns:1fr; gap:30px}
    .tech-grid{grid-template-columns:1fr; gap:30px}
    .stats-grid{grid-template-columns:repeat(2,1fr)}
    .stat:nth-child(2){border-right:none}
    .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--border)}
    .cards-3,.features,.res-grid{grid-template-columns:1fr; gap:0}
    .cards-3 .card,.features .feat{padding-top:22px}
    .nav-links{display:none}
    .nav-links.open{display:flex; position:absolute; top:72px; left:0; right:0; flex-direction:column; gap:0; background:#fff; border-bottom:1px solid var(--border); padding:8px 0}
    .nav-links.open a{padding:13px 28px}
    .nav-toggle{display:block}
    section{padding:52px 0}
  }
  @media(max-width:560px){
    .stats-grid{grid-template-columns:1fr}
    .stat{border-right:none; border-bottom:1px solid var(--border)}
    .bar-row{grid-template-columns:110px 1fr 62px}
    .cta-band{padding:36px 22px}
  }