:root{
  --bg:#f6f9fc; --card:#ffffff; --panel:rgba(255,255,255,.88); --line:#dbe4ee;
  --tx:#0f172a; --dim:#64748b; --cyan:#0891b2; --ice:#0ea5e9; --pink:#ec4899;
  --term:#0b1220; --term-tx:#d7e3f0;
  --shadow:0 24px 60px -18px rgba(15,40,80,.18), 0 4px 14px rgba(15,40,80,.08);
  --mono:ui-monospace,"SF Mono","Cascadia Code","JetBrains Mono",Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--tx);font-family:var(--sans);overflow-x:hidden}
h1,h2,h3{font-weight:700;letter-spacing:-.02em}
code,pre{font-family:var(--mono)}
a{color:inherit}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;
  max-width:1080px;margin:0 auto;padding:14px 20px;
  background:rgba(246,249,252,.8);backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(219,228,238,.7)}
.brand{font-family:var(--mono);font-weight:700;font-size:1.05rem;text-decoration:none}
.brand span{color:var(--cyan);font-weight:500}
.nav-links{display:flex;gap:1.1rem;align-items:center;font-size:.86rem}
.nav-links a{text-decoration:none;color:var(--dim)}
.nav-links a:hover{color:var(--tx)}
.nav-cta{padding:.42rem .85rem;border-radius:.6rem;background:#0284c7;color:#fff!important;
  box-shadow:0 6px 16px -6px rgba(2,132,199,.55)}
.nav-cta:hover{background:#0369a1}

/* ---------- hero ---------- */
.hero{max-width:820px;margin:0 auto;padding:72px 20px 40px;text-align:center}
.eyebrow{font-family:var(--mono);font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--cyan);margin-bottom:1rem}
.hero h1{font-size:clamp(2.2rem,5vw,3.6rem);line-height:1.08;margin-bottom:1.1rem}
.lede{font-size:1.02rem;line-height:1.65;color:var(--dim);max-width:620px;margin:0 auto 1.8rem}
.hero-links{display:flex;gap:.7rem;justify-content:center;margin-top:1.2rem}
.ghost{padding:.6rem 1.1rem;border-radius:.65rem;border:1px solid var(--line);background:#fff;
  font-size:.84rem;text-decoration:none;color:var(--tx);transition:border-color .15s ease}
.ghost:hover{border-color:#b9c8da}

/* reveal on load */
.reveal{opacity:0;transform:translateY(14px);animation:rise .6s cubic-bezier(.2,.7,.2,1) forwards}
.d1{animation-delay:.08s}.d2{animation-delay:.18s}.d3{animation-delay:.3s}.d4{animation-delay:.42s}
@keyframes rise{to{opacity:1;transform:none}}

/* ---------- terminal ---------- */
.term{position:relative;max-width:460px;margin:0 auto;background:var(--term);border-radius:14px;
  border:1px solid rgba(125,211,252,.18);box-shadow:0 20px 50px -16px rgba(6,18,38,.5);
  text-align:left;overflow:hidden}
.term-head{display:flex;align-items:center;gap:.4rem;padding:.55rem .9rem;
  border-bottom:1px solid rgba(125,211,252,.12)}
.term-head i{width:.62rem;height:.62rem;border-radius:50%;background:#334155}
.term-head i:nth-child(1){background:#f87171}.term-head i:nth-child(2){background:#fbbf24}
.term-head i:nth-child(3){background:#34d399}
.term-head span{margin-left:.4rem;font-family:var(--mono);font-size:.62rem;color:#64748b;letter-spacing:.08em}
.term-line{display:flex;align-items:center;gap:.6rem;padding:.85rem 1rem}
.term-line .p{color:#5eead4;font-family:var(--mono);user-select:none}
.term-line code{font-family:var(--mono);font-size:.92rem;color:var(--term-tx);flex:1;white-space:nowrap}
.copy{margin-left:auto;flex:none;display:grid;place-items:center;width:2rem;height:2rem;border-radius:.5rem;
  border:1px solid rgba(125,211,252,.25);background:rgba(125,211,252,.06);color:#93c5fd;cursor:pointer;
  transition:background .15s ease,color .15s ease}
.copy:hover{background:rgba(125,211,252,.14);color:#e0f2fe}
.copy .ic-copy,.copy .ic-check{width:1rem;height:1rem}
.copy .ic-check{display:none}
.copy .ic-check path{stroke-dasharray:30;stroke-dashoffset:30}
.copy.copied .ic-copy{display:none}
.copy.copied .ic-check{display:block}
.copy.copied .ic-check path{animation:draw .35s ease forwards}
.copy.copied{color:#4ade80;border-color:rgba(74,222,128,.4)}
@keyframes draw{to{stroke-dashoffset:0}}

/* ---------- demo (the waterslide) ---------- */
.demo{max-width:980px;margin:8px auto 0;padding:0 20px}
#viz-card{position:relative;margin:0;height:560px;border-radius:22px;overflow:hidden;
  background:linear-gradient(180deg,#fdfeff,#e8f2fa);
  border:1px solid var(--line);box-shadow:var(--shadow)}
#stage{position:absolute;inset:0}
#stage canvas{width:100%;height:100%;display:block;cursor:pointer}
.demo-caption{text-align:center;font-family:var(--mono);font-size:.66rem;color:#94a3b8;
  padding:.9rem 0 0}

/* HUD inside the card */
#brand,#typebox,#pick,#hint{user-select:none}
#typebox{position:absolute;top:18px;left:50%;transform:translateX(-50%);z-index:5;
  display:flex;align-items:center;gap:.55rem;padding:.6rem .95rem;border-radius:.75rem;
  max-width:min(92%,520px);
  background:var(--panel);border:1px solid var(--line);backdrop-filter:blur(6px);
  box-shadow:0 8px 26px rgba(15,40,80,.1)}
#typebox .prompt{color:var(--cyan);font-size:.74rem;white-space:nowrap}
#typed{min-width:150px;font-size:.82rem;white-space:nowrap;overflow:hidden;text-overflow:clip}
.caret{width:.55em;height:1.05em;background:#334155;display:inline-block;margin-left:2px;
  animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
#pick{position:absolute;top:78px;left:50%;transform:translateX(-50%);z-index:5;
  font-size:.66rem;padding:.38rem .8rem .42rem;border-radius:5px;white-space:nowrap;
  background:linear-gradient(180deg,#fbf0da,#f3e3c3);color:#5b3a1e;
  border:2px solid #a4713d;box-shadow:0 4px 14px rgba(91,58,30,.25), inset 0 0 0 1px rgba(255,255,255,.5);
  opacity:0;transition:opacity .25s ease;pointer-events:none}
#pick::after{content:'';position:absolute;left:50%;top:100%;transform:translateX(-50%);
  width:9px;height:13px;border-radius:0 0 3px 3px;
  background:linear-gradient(180deg,#8b5e3c,#6d4526)}
#pick.show{opacity:1}
#hint{position:absolute;right:16px;bottom:16px;z-index:6;
  font-size:.62rem;padding:.42rem .75rem;border-radius:999px;white-space:nowrap;
  background:rgba(255,255,255,.92);border:1px solid var(--line);color:var(--dim);
  box-shadow:0 6px 18px rgba(15,40,80,.1);backdrop-filter:blur(6px);
  pointer-events:none;animation:hintIn .5s ease 1.4s both}
#hint.off{opacity:0;transition:opacity .4s ease}
@keyframes hintIn{from{opacity:0;transform:translateY(8px)}to{opacity:1}}
#webgl-error{position:absolute;inset:0;z-index:9;display:none;place-items:center;
  background:#fff;color:#dc2626;font-size:.8rem;text-align:center;padding:2rem}

/* ---------- trust strip ---------- */
.trust{display:flex;flex-wrap:wrap;gap:.55rem;justify-content:center;align-items:center;
  max-width:900px;margin:26px auto 0;padding:0 20px}
.trust img{border-radius:4px}
.chip{font-family:var(--mono);font-size:.66rem;padding:.34rem .7rem;border-radius:999px;
  background:#fff;border:1px solid var(--line);color:var(--dim)}
.chip.wide{color:var(--cyan);border-color:rgba(8,145,178,.3)}

/* ---------- sections shared ---------- */
.how,.features,.showcase,.cta{max-width:1080px;margin:0 auto;padding:84px 20px 0}
.how h2,.features h2,.showcase h2,.cta h2{font-size:clamp(1.5rem,3vw,2.1rem);margin-bottom:2.2rem}
.how{text-align:center}
.how .eyebrow,.features .eyebrow,.showcase .eyebrow{margin-bottom:.7rem}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;text-align:left}
.step{background:#fff;border:1px solid var(--line);border-radius:16px;padding:1.3rem 1.2rem;
  box-shadow:0 10px 30px -14px rgba(15,40,80,.14)}
.num{display:inline-grid;place-items:center;width:1.9rem;height:1.9rem;border-radius:.6rem;
  background:#e0f2fe;color:#0369a1;font-family:var(--mono);font-weight:700;font-size:.9rem;
  margin-bottom:.8rem}
.step h3{font-size:1.02rem;margin-bottom:.5rem}
.step p{font-size:.84rem;line-height:1.55;color:var(--dim)}
.artifact{margin-top:.85rem;padding:.65rem .75rem;border-radius:.6rem;background:#0b1220;
  color:#9be8ff;font-size:.7rem;line-height:1.6;overflow-x:auto}
.fine{margin-top:.6rem;font-family:var(--mono);font-size:.62rem;color:#94a3b8}

/* features bento */
.bento{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:1.5rem 1.5rem 1.4rem;
  box-shadow:0 10px 30px -14px rgba(15,40,80,.14)}
.card h3{font-size:1.05rem;margin-bottom:.55rem}
.card p{font-size:.88rem;line-height:1.6;color:var(--dim)}
.card code{font-size:.8rem;background:#eef4fa;border:1px solid var(--line);border-radius:.35rem;
  padding:.06rem .35rem;color:#0c4a6e}

/* showcase */
.showcase{display:grid;grid-template-columns:1fr 1.1fr;gap:3rem;align-items:center}
.show-copy p{font-size:.92rem;line-height:1.65;color:var(--dim);margin-bottom:1rem}
.show-copy .fine{margin-top:0}
.term.big{max-width:none;margin:0}
.term.big .term-head span{font-size:.68rem}
.term-body{padding:1.1rem 1.2rem;font-family:var(--mono);font-size:.78rem;line-height:1.75;
  color:#c9d6e4;overflow-x:auto}
.term-body .n{color:#7dd3fc;font-weight:600}
.term-body .v{color:#f9a8d4}
.term-body .s{color:#94a3b8}
.term-body .t{color:#5eead4}
.term-body .d{color:#64748b}

/* cta */
.cta{text-align:center;padding-bottom:96px}
.cta h2{margin-bottom:1.6rem}
.cta .term{max-width:460px}
.cta>p{margin-top:1.1rem;font-size:.86rem;color:var(--dim)}
.cta>p code{font-family:var(--mono);font-size:.8rem;background:#eef4fa;border:1px solid var(--line);
  border-radius:.35rem;padding:.06rem .35rem;color:#0c4a6e}

/* footer */
.foot{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  max-width:1080px;margin:0 auto;padding:22px 20px 30px;border-top:1px solid var(--line);
  font-family:var(--mono);font-size:.66rem;color:#94a3b8}
.foot a{color:var(--dim);text-decoration:none}
.foot a:hover{color:var(--tx)}

/* ---------- gif / video export mode ---------- */
.gif body{display:block;padding:0;overflow:hidden}
.gif .page{display:none!important}
.gif #viz-card{position:fixed;inset:0;height:100%;border-radius:0;border:0;box-shadow:none;min-height:0}
.gif #hint{display:none}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .steps{grid-template-columns:1fr 1fr}
  .showcase{grid-template-columns:1fr;gap:1.6rem}
}
@media (max-width:640px){
  .steps,.bento{grid-template-columns:1fr}
  .hero{padding-top:52px}
  #viz-card{height:62vh;min-height:420px}
  .nav-links a:not(.nav-cta){display:none}
}
@media (max-height:600px){
  #hint{display:none}
}
@media (prefers-reduced-motion:reduce){
  .reveal{animation:none;opacity:1;transform:none}
  .caret,#hint{animation:none}
  html{scroll-behavior:auto}
}

.hero-badges{display:flex;justify-content:center;margin-top:14px}
.hero-badges img{height:20px}