/* ==========================================================================
   sections below the hero: marquee, how it works, features, privacy, source
   ========================================================================== */

/* ---------- velocity marquee ---------- */
.marquee{
  position:relative;z-index:3;overflow:hidden;padding:clamp(18px,2.4vw,34px) 0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg);
}
.marquee-row{display:flex;width:max-content;will-change:transform;}
.marquee-row + .marquee-row{margin-top:6px;}
.marquee-item{
  display:flex;align-items:center;gap:.5em;padding-right:.5em;white-space:nowrap;
  font-size:clamp(34px,6vw,92px);font-weight:700;letter-spacing:-.04em;line-height:1.05;
}
.marquee-item .star{font-size:.5em;color:var(--hot2);display:inline-block;}
.marquee-row.outline .marquee-item{color:transparent;-webkit-text-stroke:1px rgba(244,237,232,.35);}
.marquee-row.outline .marquee-item .star{-webkit-text-stroke:0;color:var(--hot3);}

/* ---------- how it works (circuit when pinned, timeline otherwise) ---------- */
.how{
  background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:clamp(100px,12vw,170px) 0;overflow:hidden;
}
.how .title{font-size:clamp(38px,5vw,78px);}
.how-grid{position:relative;}
.circuit-wrap,.readout{display:none;}

.stages{list-style:none;position:relative;display:grid;gap:8px;max-width:720px;}
.stages::before,.stages::after{
  content:"";position:absolute;left:27px;top:44px;bottom:44px;width:1px;background:var(--line2);
}
.stages::after{background:var(--grad);transform-origin:top;transform:scaleY(var(--p,0));box-shadow:0 0 12px var(--hot1);}
.no-js .stages::after,.reduced .stages::after{transform:none;}
.stage{position:relative;display:grid;grid-template-columns:56px 1fr;gap:22px;align-items:start;padding:16px 0;}
.stage-dot{
  position:relative;z-index:1;width:56px;height:56px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:13px;letter-spacing:.06em;color:var(--dim);
  background:var(--bg2);border:1px solid var(--line2);
  transition:border-color .4s,box-shadow .4s,color .4s;
}
.stage.lit .stage-dot{border-color:var(--hot1);color:var(--ink);box-shadow:0 0 0 6px rgba(194,71,201,.1),0 0 26px -4px var(--hot1);}
.stage h3{font-size:24px;font-weight:700;letter-spacing:-.03em;margin:12px 0 6px;}
.stage p{font-size:15px;line-height:1.6;color:var(--dim);max-width:520px;}

.how.is-pinned{padding:0;}
.how.is-pinned .how-pin{height:100svh;display:flex;flex-direction:column;justify-content:center;padding-top:var(--nav-h);}
.how.is-pinned .how-top{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:60px;align-items:end;}
.how.is-pinned .section-head{margin-bottom:0;}
.how.is-pinned .stages{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);}
.how.is-pinned .readout{display:block;}
.how.is-pinned .circuit-wrap{display:block;margin-top:clamp(20px,4vh,56px);}

.readout{position:relative;min-height:200px;padding-bottom:6px;}
.readout-top{display:flex;align-items:center;gap:16px;font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--hot2);margin-bottom:18px;}
.readout-top .bar{flex:1;max-width:160px;height:1px;background:var(--line2);position:relative;overflow:hidden;}
.readout-top .bar span{position:absolute;inset:0;background:var(--hot2);transform-origin:left;transform:scaleX(0);}
.readout-label{font-size:clamp(34px,3.8vw,60px);font-weight:700;letter-spacing:-.04em;line-height:1;margin-bottom:16px;}
.readout-desc{font-size:16px;line-height:1.6;color:var(--dim);max-width:460px;min-height:4.8em;}

.circuit{width:100%;height:auto;overflow:visible;}
.circuit .trace-bg{fill:none;stroke:var(--line2);stroke-width:2;}
.circuit .trace{fill:none;stroke:url(#trace-grad);stroke-width:2.5;stroke-linecap:round;filter:drop-shadow(0 0 6px rgba(194,71,201,.7));}
.circuit .grid-dot{fill:rgba(255,255,255,.07);}
.circuit .node-ring{fill:var(--bg2);stroke:var(--line2);stroke-width:1.5;transition:stroke .3s;}
.circuit .node-halo{fill:none;stroke:var(--hot1);stroke-width:1;opacity:0;}
.circuit .node.lit .node-ring{stroke:var(--hot1);}
.circuit .node-idx{font-family:var(--mono);font-size:14px;fill:var(--mute);transition:fill .3s;}
.circuit .node.lit .node-idx{fill:var(--ink);}
.circuit .node-label{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;fill:var(--mute);transition:fill .3s;}
.circuit .node.lit .node-label{fill:var(--ink);}
.circuit .node.current .node-label{fill:var(--hot2);}
.circuit .spark{fill:#fff;filter:drop-shadow(0 0 6px var(--hot4)) drop-shadow(0 0 14px var(--hot2));}

/* ---------- why: feature cards ---------- */
.why{padding:clamp(100px,12vw,180px) 0;}
.why .title{font-size:clamp(38px,5vw,78px);}
.features{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
.fcard{
  --mx:50%;--my:0%;
  position:relative;overflow:hidden;isolation:isolate;
  display:flex;flex-direction:column;gap:10px;padding:22px 24px 28px;border-radius:22px;
  background:var(--bg2);border:1px solid var(--line);
  transition:border-color .4s;
}
.fcard::before{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;opacity:0;transition:opacity .4s;
  background:radial-gradient(420px circle at var(--mx) var(--my),rgba(194,71,201,.14),transparent 60%);
}
.fcard:hover{border-color:var(--line2);}
.fcard:hover::before{opacity:1;}
.fcard-visual{
  position:relative;aspect-ratio:400/220;margin:-4px -6px 14px;border-radius:14px;overflow:hidden;
  background:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px) 0 0/20px 20px,
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px) 0 0/20px 20px,
    var(--bg);
  border:1px solid var(--line);
}
.fcard-visual svg{width:100%;height:100%;}
.fv-label{
  position:absolute;font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--mute);
}
.fv-label.tl{left:14px;top:12px;}
.fcard-idx{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--hot2);}
.fcard h3{font-size:clamp(24px,2.3vw,32px);font-weight:700;letter-spacing:-.035em;line-height:1.05;}
.fcard p{font-size:15px;line-height:1.6;color:var(--dim);max-width:52ch;}
.fcard code{color:var(--ink);background:rgba(255,255,255,.06);padding:1px 6px;border-radius:6px;}
@media (max-width:820px){.features{grid-template-columns:1fr;}}

/* ---------- privacy ledger ---------- */
.privacy-strip{padding:clamp(100px,12vw,170px) 0;background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.privacy-strip .title{font-size:clamp(38px,5vw,78px);}
.ledger{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
.ledger-col{padding:26px 28px;border-radius:22px;border:1px solid var(--line);background:rgba(10,8,8,.5);}
.ledger-col h3{
  display:flex;align-items:center;gap:12px;margin-bottom:18px;
  font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;
}
.ledger-col h3 i{
  display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;font-style:normal;font-size:15px;letter-spacing:0;
}
.ledger-col.ok h3{color:var(--ok);}
.ledger-col.ok h3 i{background:rgba(61,220,132,.12);border:1px solid rgba(61,220,132,.4);}
.ledger-col.no h3{color:#ff8fa3;}
.ledger-col.no h3 i{background:rgba(255,92,122,.12);border:1px solid rgba(255,92,122,.4);}
.ledger-col ul{list-style:none;display:grid;}
.ledger-col li{padding:13px 0;border-top:1px solid var(--line);font-size:15.5px;line-height:1.5;color:var(--ink);}
.ledger-col.no li{color:var(--dim);}
.ledger-more{margin-top:28px;font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;}
.ledger-more a{text-decoration:none;color:var(--dim);}
@media (max-width:820px){.ledger{grid-template-columns:1fr;}}

/* ---------- open source ---------- */
.oss{padding:clamp(100px,12vw,170px) 0;}
.oss .title{font-size:clamp(38px,5vw,78px);}
.oss-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(40px,6vw,90px);align-items:center;}
.oss .sub{margin-top:26px;}
.term{border-radius:18px;border:1px solid var(--line2);background:#0d0a0a;overflow:hidden;box-shadow:0 40px 90px -40px rgba(138,92,255,.4);}
.term-bar{display:flex;align-items:center;gap:7px;padding:12px 16px;border-bottom:1px solid var(--line);}
.term-bar i{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.12);}
.term-bar span{margin-left:10px;font-family:var(--mono);font-size:11px;color:var(--mute);letter-spacing:.06em;}
.term pre{padding:22px 22px 26px;overflow-x:auto;}
.term code{font-size:14px;line-height:1.9;color:var(--ink);}
.term .c{color:var(--mute);}
.term .p{color:var(--hot2);}
.term .ok{color:var(--ok);}
@media (max-width:900px){.oss-grid{grid-template-columns:1fr;}}