/* =========================================================
   tech.css — Technology page styles
   Extends styles.css (same design system)
   ========================================================= */

/* ---- Hero background grid ---- */
.tech-hero-grid{
  position:absolute;inset:0;z-index:1;overflow:hidden;pointer-events:none;
}
.thg-svg{
  position:absolute;inset:0;width:100%;height:100%;
  color:var(--ink);
}
.thg-fine { opacity:.045 }
.thg-major{ opacity:.09  }
.thg-diag{
  stroke:var(--ink);stroke-width:.8;opacity:.06;
}
.thg-accent{
  stroke:var(--accent);stroke-width:1;opacity:.12;
}
.thg-rule{
  stroke:var(--ink);stroke-width:.5;stroke-dasharray:4 10;opacity:.07;
}
/* ---- Hero ---- */
.tech-hero{
  position:relative;min-height:100svh;display:flex;align-items:center;
  padding-top:96px;overflow:hidden;background:var(--bg)
}
/* canvas: z-index 0 (below grid overlay at 1, below text at 2) */
.tech-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;z-index:0}
.tech-hero-inner{position:relative;z-index:2;max-width:800px}
.tech-eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13.5px;font-weight:600;
  letter-spacing:.02em;color:var(--accent-deep);background:var(--accent-soft);
  border:1px solid var(--accent-line);padding:8px 15px;border-radius:999px;margin-bottom:26px}
.tech-h1{font-family:var(--font-display);font-size:clamp(40px,6.4vw,80px);
  letter-spacing:-.035em;line-height:1.04;margin-bottom:24px}
.tech-h1-sub{display:block;font-size:clamp(26px,4vw,52px);color:var(--ink-soft);
  font-weight:400;letter-spacing:-.02em}
.tech-lede{font-size:clamp(17px,1.6vw,20px);color:var(--ink-soft);max-width:36em;margin-bottom:34px}
.tech-lede strong{color:var(--ink);font-weight:600}
.tech-pills{display:flex;gap:12px;flex-wrap:wrap}
.pill{font-size:14px;font-weight:600;padding:9px 18px;border-radius:999px;
  background:var(--bg-2);border:1px solid var(--line);color:var(--ink-soft);
  transition:background .25s,color .25s,border-color .25s}
.pill:hover{background:var(--accent-soft);color:var(--accent-deep);border-color:var(--accent-line)}

/* floating equation fragments */
.eq-float{position:absolute;font-family:var(--font-mono);font-size:14px;font-weight:500;
  color:var(--ink);opacity:0.10;white-space:nowrap;pointer-events:none;z-index:1;
  animation:eqfloat 8s ease-in-out infinite}
.eq-f1{top:18%;right:8%;animation-delay:0s}
.eq-f2{top:42%;right:14%;font-size:16px;animation-delay:1.5s}
.eq-f3{top:30%;right:28%;font-size:12px;animation-delay:3s}
.eq-f4{top:62%;right:6%;font-size:20px;font-weight:700;opacity:0.15;animation-delay:0.8s}
@keyframes eqfloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}

/* ---- Stack → Architecture diagram ---- */
.arch-diagram{
  display:grid;
  grid-template-columns: 1fr 80px 1fr 80px 1fr;
  gap:0;align-items:center;
  margin-bottom:48px;
}
.arch-col{ display:flex;flex-direction:column;gap:16px }
.arch-col-label{ display:flex;justify-content:center }
.arch-col-tag{
  font-family:var(--font-mono);font-size:11px;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-faint);background:var(--bg-tint);
  border:1px solid var(--line);padding:6px 14px;border-radius:999px;
}
.arch-col-tag-accent{
  color:var(--accent);background:var(--accent-soft);border-color:var(--accent-line);
}

/* input/output node pills */
.arch-nodes{ display:flex;flex-direction:column;gap:10px }
.arch-node{
  display:flex;align-items:center;gap:11px;
  background:var(--bg-3);border:1px solid var(--line);
  border-radius:var(--r);padding:12px 16px;
  font-size:14px;font-weight:500;color:var(--ink-soft);
  transition:border-color .25s,box-shadow .25s,transform .25s;
}
.arch-node:hover{ border-color:var(--accent-line);box-shadow:var(--shadow-sm);transform:translateX(-3px) }
.arch-col-out .arch-node:hover{ transform:translateX(3px) }
.an-icon{
  flex:none;width:30px;height:30px;border-radius:8px;
  display:grid;place-items:center;
  background:var(--bg-tint);color:var(--ink-soft);
  border:1px solid var(--line-2);
}
.an-icon svg{ width:16px;height:16px }
.an-out-savings .an-icon{ background:var(--accent-soft);color:var(--accent);border-color:var(--accent-line) }
.an-out-savings{ border-color:var(--accent-line);color:var(--accent-deep) }

/* connector canvas columns */
.arch-connectors{ position:relative;height:100%;min-height:320px }
.arch-conn-canvas{ position:absolute;inset:0;width:100%;height:100%;display:block }

/* Engine center */
.arch-engine{
  display:flex;flex-direction:column;gap:0;
  border:1px solid var(--accent-line);border-radius:var(--r-xl);
  overflow:hidden;
  box-shadow:0 0 0 4px color-mix(in oklab,var(--accent),transparent 88%),
             var(--shadow);
}
.engine-block{
  position:relative;overflow:hidden;
  padding:26px 24px 22px;
  background:var(--bg-3);
}
.eb-twin{ border-bottom:1px solid var(--accent-line) }
.eb-pulse{
  position:absolute;inset:-40%;border-radius:50%;
  background:radial-gradient(circle,
    color-mix(in oklab,var(--accent),transparent 72%) 0%,
    transparent 68%);
  animation:ebpulse 3s ease-in-out infinite;
  pointer-events:none;
}
.eb-pulse-2{ animation-delay:1.5s }
@keyframes ebpulse{
  0%,100%{ opacity:.45;transform:scale(.85) }
  50%{     opacity:.85;transform:scale(1.05) }
}
.eb-head{ margin-bottom:10px }
.eb-badge{
  display:inline-block;font-family:var(--font-mono);font-size:10.5px;font-weight:700;
  letter-spacing:.12em;text-transform:uppercase;
  color:var(--accent);background:var(--accent-soft);
  border:1px solid var(--accent-line);padding:4px 10px;border-radius:999px;
}
.eb-title{
  font-family:var(--font-display);font-size:22px;font-weight:700;
  color:var(--ink);letter-spacing:-.02em;margin-bottom:8px;position:relative;z-index:1;
}
.eb-desc{
  font-size:13.5px;color:var(--ink-soft);line-height:1.55;
  margin-bottom:14px;position:relative;z-index:1;
}
.eb-metric{
  display:inline-flex;align-items:baseline;gap:8px;
  background:var(--accent-soft);border:1px solid var(--accent-line);
  border-radius:var(--r);padding:8px 14px;position:relative;z-index:1;
}
.eb-metric b{ font-family:var(--font-display);font-size:20px;font-weight:700;color:var(--accent-deep) }
.eb-metric span{ font-size:12px;color:var(--ink-soft) }

.engine-flow-arrow{
  display:flex;align-items:center;gap:10px;
  padding:12px 24px;background:var(--bg-tint);
  border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2);
}
.engine-flow-arrow svg{ width:40px;height:24px;flex:none }
.engine-flow-arrow span{ font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.08em;color:var(--accent);text-transform:uppercase;opacity:.7 }

/* bottom stat strip */
.arch-stats{
  display:flex;align-items:center;justify-content:center;gap:0;
  background:var(--bg-tint);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px 0;
}
.arch-stat{ display:flex;flex-direction:column;align-items:center;gap:4px;padding:0 32px }
.arch-stat b{ font-family:var(--font-display);font-size:26px;font-weight:700;color:var(--accent-deep) }
.arch-stat span{ font-size:13px;color:var(--ink-faint) }
.arch-stat-div{ width:1px;height:40px;background:var(--line) }

@media(max-width:1100px){
  .arch-diagram{ grid-template-columns:1fr 50px 1fr 50px 1fr }
}
@media(max-width:800px){
  .arch-diagram{
    grid-template-columns:1fr;
    gap:24px;
  }
  .arch-connectors{ display:none }
  .arch-stats{ flex-wrap:wrap;gap:16px;padding:20px 16px }
  .arch-stat-div{ display:none }
}

/* ---- keep old .stack-diagram CSS for any other references ---- */

/* ---- Neural ODE section ---- */
.tech-ode{overflow:hidden}
.ode-bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.ode-canvas{width:100%;height:100%;display:block}
.ode-grid{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;
  gap:60px;align-items:center}
.ode-eq-box{background:var(--deep);color:#fff;border-radius:var(--r-lg);
  padding:26px 28px;margin-top:28px;margin-bottom:28px}
.eq-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--accent-light);margin-bottom:10px}
.eq-formula{font-family:var(--font-mono);font-size:22px;font-weight:500;
  color:#fff;letter-spacing:.02em;margin-bottom:10px}
.eq-desc{font-size:13.5px;color:rgba(255,255,255,.62);line-height:1.55}

.ode-cards{display:flex;flex-direction:column;gap:14px}
.ode-card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r);
  padding:20px 22px;display:flex;gap:16px;align-items:flex-start;
  transition:transform .3s,box-shadow .3s}
.ode-card:hover{transform:translateX(4px);box-shadow:var(--shadow-sm)}
.oc-icon{flex:none;width:38px;height:38px;border-radius:10px;background:var(--accent-soft);
  color:var(--accent);display:grid;place-items:center;border:1px solid var(--accent-line)}
.oc-icon svg{width:20px;height:20px}
.ode-card h3{font-size:16px;margin-bottom:4px}
.ode-card p{font-size:14.5px;color:var(--ink-soft);margin:0}
.ode-card strong{color:var(--ink);font-weight:600}

/* ode diagram SVG */
.ode-diagram{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-xl);
  padding:20px;box-shadow:var(--shadow)}
.ode-svg{width:100%;height:auto;display:block}

/* SVG classes */
.nd{stroke:none}
.nd-in{fill:var(--ink);fill-opacity:.18}
.nd-h1{fill:var(--ink);fill-opacity:.25}
.nd-ode{fill:var(--accent);fill-opacity:.20;stroke:var(--accent);stroke-opacity:.55;
  stroke-width:2;filter:drop-shadow(0 0 10px color-mix(in oklab,var(--accent),transparent 60%))}
.nd-out{fill:var(--accent);fill-opacity:.35}
.nd-conn{fill:none;stroke:var(--ink);stroke-width:1}
.nd-conn-accent{fill:none;stroke:var(--accent);stroke-opacity:.40;stroke-width:1.5}
.nd-ring{fill:none;stroke:var(--accent);stroke-opacity:.20;stroke-width:1;stroke-dasharray:4 5}
.nd-label{font-family:var(--font-mono);font-size:11px;text-anchor:middle;
  fill:var(--ink);fill-opacity:.40}
.nd-val{font-family:var(--font-mono);font-size:9px;text-anchor:middle;
  fill:var(--ink);fill-opacity:.55}
.nd-ring-lbl{font-family:var(--font-mono);font-size:9px;fill:var(--accent);fill-opacity:.50}
.ode-lbl-main{font-family:var(--font-mono);font-size:12px;font-weight:700;
  fill:var(--accent);fill-opacity:.90}
.ode-lbl-sub{font-family:var(--font-mono);font-size:8px;fill:var(--accent);fill-opacity:.60}

.ode-r2{margin-top:16px;text-align:center;background:var(--accent-soft);
  border:1px solid var(--accent-line);border-radius:var(--r);padding:14px;display:flex;
  align-items:center;justify-content:center;gap:14px}
.r2-val{font-family:var(--font-display);font-size:26px;font-weight:700;color:var(--accent-deep)}
.r2-label{font-size:14px;color:var(--ink-soft)}

/* ---- MPC section ---- */
.tech-mpc{position:relative;overflow:hidden;background:var(--bg-tint)}
.mpc-bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.mpc-bg-svg{width:100%;height:100%;display:block}
.tech-mpc .wrap{position:relative;z-index:1}

.mpc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:48px}
.mpc-card{background:var(--bg-3);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 24px 24px;display:flex;flex-direction:column;gap:10px;
  transition:transform .35s,box-shadow .35s;box-shadow:var(--shadow-sm)}
.mpc-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.mpc-card-accent{background:color-mix(in oklab,var(--accent-soft),white 55%);
  border-color:var(--accent-line)}
.mpc-icon{width:48px;height:48px;border-radius:14px;background:var(--accent-soft);
  color:var(--accent-deep);display:grid;place-items:center;border:1px solid var(--accent-line);
  margin-bottom:4px}
.mpc-icon svg{width:26px;height:26px}
.mpc-tag{font-family:var(--font-mono);font-size:10.5px;font-weight:700;letter-spacing:.14em;
  color:var(--accent);text-transform:uppercase}
.mpc-card h3{font-size:22px;margin:0}
.mpc-card p{font-size:15px;color:var(--ink-soft);margin:0;flex:1}
.mpc-card strong{color:var(--ink);font-weight:600}
.mpc-card em{font-style:normal;color:var(--accent);font-weight:600}
.mpc-mini-viz{margin-top:auto;padding-top:16px}
.mpc-sparkline{width:100%;height:56px;display:block;overflow:visible}
.mpc-mini-labels{display:flex;justify-content:space-between;font-family:var(--font-mono);
  font-size:11px;color:var(--ink-faint);margin-top:4px}

/* MPC cycle */
.mpc-cycle{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;
  align-items:start;gap:12px;background:var(--bg-3);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:28px 24px;box-shadow:var(--shadow-sm)}
.cycle-step{display:flex;flex-direction:column;gap:5px}
.cy-num{font-family:var(--font-mono);font-size:11px;font-weight:700;color:var(--accent);
  letter-spacing:.06em}
.cycle-step b{font-size:16px;color:var(--ink)}
.cycle-step span{font-size:13px;color:var(--ink-soft)}
.cycle-arrow{font-size:22px;color:var(--accent);opacity:.5;align-self:center;line-height:1;
  padding-top:18px}

/* ---- Edge section ---- */
.tech-edge{background:var(--deep);color:#EAF3ED}
.tech-edge .kicker{color:var(--accent-light)}
.tech-edge .sec-title{color:#fff}
.tech-edge .mv-lede{color:rgba(234,243,237,.75)}
.edge-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.edge-feats{display:flex;flex-direction:column;gap:20px;margin-top:32px}
.edge-feat{display:flex;gap:16px;align-items:flex-start}
.ef-ic{flex:none;width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  background:rgba(255,255,255,.08);font-size:18px}
.edge-feat b{display:block;color:#fff;font-size:16px;margin-bottom:4px}
.edge-feat p{font-size:14.5px;color:rgba(234,243,237,.70);margin:0}

/* edge SVG */
.edge-svg{width:100%;height:auto;display:block}
.ed-bldg{fill:rgba(255,255,255,.04);stroke:rgba(255,255,255,.18);stroke-width:1.5}
.ed-lbl-sm{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.12em;
  fill:rgba(255,255,255,.30);text-transform:uppercase}
.ed-gw{fill:rgba(255,255,255,.08);stroke:var(--accent-light);stroke-opacity:.45;stroke-width:1.5}
.ed-gw-title{font-family:var(--font-display);font-size:13px;font-weight:600;fill:#fff;fill-opacity:.85}
.ed-chip{fill:rgba(255,255,255,.10);stroke:rgba(255,255,255,.20);stroke-width:1}
.ed-chip-lbl{font-family:var(--font-mono);font-size:8px;fill:var(--accent-light);fill-opacity:.80}
.ed-led{fill:var(--accent);fill-opacity:.80;filter:drop-shadow(0 0 4px var(--accent))}
.ed-hvac .ed-node{fill:rgba(255,255,255,.07);stroke:rgba(255,255,255,.22);stroke-width:1.2}
.ed-node-lbl{font-family:var(--font-display);font-size:10px;font-weight:600;fill:#fff;fill-opacity:.75}
.ed-node-sub{font-family:var(--font-mono);font-size:8.5px;fill:rgba(255,255,255,.40)}
.ed-wires{stroke:var(--accent-light);stroke-opacity:.35;stroke-width:1.5;
  stroke-dasharray:5 5;fill:none;
  animation:wireflow 2s linear infinite}
@keyframes wireflow{to{stroke-dashoffset:-20}}
.ed-wires-light{stroke:rgba(255,255,255,.20);stroke-width:1;stroke-dasharray:3 5;fill:none}
.ed-sensor{fill:rgba(255,255,255,.06);stroke:rgba(255,255,255,.18);stroke-width:1}
.ed-sensor-lbl{font-family:var(--font-mono);font-size:8.5px;fill:rgba(255,255,255,.55)}
.ed-proto{font-family:var(--font-mono);font-size:9px;fill:var(--accent-light);fill-opacity:.60}
.ed-no-cloud{fill:rgba(255,255,255,.06);stroke:rgba(255,255,255,.20);stroke-width:1.5;stroke-dasharray:4 3}
.ed-no-lbl{font-family:var(--font-mono);font-size:8px;font-weight:700;
  fill:rgba(255,255,255,.40);letter-spacing:.04em}

/* ---- CTA section ---- */
.tech-cta{position:relative;overflow:hidden;background:var(--deep);color:#fff;
  text-align:center}
.tech-cta .cta-scene canvas{width:100%;height:100%;display:block}
.tech-cta-inner{position:relative;z-index:2;padding-block:clamp(72px,9vw,120px);
  display:flex;flex-direction:column;align-items:center;gap:24px}
.tech-cta .cta-title{font-size:clamp(36px,5.2vw,64px);color:#fff;letter-spacing:-.03em}
.tech-cta .cta-sub{color:rgba(255,255,255,.75);font-size:18px;max-width:36em}
.tech-cta-btns{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;margin-top:8px}
.tech-cta .btn-ghost{color:#fff;border-color:rgba(255,255,255,.30)}
.tech-cta .btn-ghost:hover{background:rgba(255,255,255,.10);border-color:rgba(255,255,255,.55)}

/* ---- Responsive ---- */
@media(max-width:980px){
  .ode-grid,.edge-grid{grid-template-columns:1fr;gap:36px}
  .ode-viz{display:none}
  .mpc-grid{grid-template-columns:1fr}
  .mpc-cycle{grid-template-columns:1fr;gap:20px}
  .cycle-arrow{transform:rotate(90deg)}
  .tech-h1{font-size:clamp(32px,8vw,56px)}
  .eq-float{display:none}
}
@media(max-width:620px){
  .stack-layer{flex-direction:column;align-items:flex-start;gap:12px}
  .sl-label{min-width:0}
  .tech-cta-btns{flex-direction:column;width:100%;max-width:320px}
}