:root{
  --bg:#050b12;
  --bg2:#08121c;
  --panel:#0b1722;
  --line:#132633;
  --ink:#e8f1f5;
  --mut:#8aa3b0;
  --teal:#2dd4c4;
  --sky:#38bdf8;
  --grad:linear-gradient(120deg,var(--teal),var(--sky));
  --font-d:"Space Grotesk",sans-serif;
  --font-b:"Inter",sans-serif;
  --r:14px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--font-b);font-size:16.5px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:rgba(45,212,196,.28)}
a{color:inherit;text-decoration:none}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.dim{color:var(--mut)}
.fineprint{font-size:.8rem;color:var(--mut)}
.ok{color:var(--teal)}

/* ---------- progress bar ---------- */
.progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--grad);z-index:100;transition:width .1s linear}

/* ---------- nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:90;display:flex;align-items:center;justify-content:space-between;padding:18px clamp(20px,5vw,64px);transition:background .35s,border .35s,padding .35s;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(5,11,18,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);padding:12px clamp(20px,5vw,64px)}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-d);font-weight:600;font-size:1.05rem;letter-spacing:.14em}
.brand b{font-weight:400;color:var(--teal)}
.mark{width:30px;height:30px;filter:drop-shadow(0 0 8px rgba(45,212,196,.35))}
.navlinks{display:flex;gap:clamp(14px,2.5vw,32px);font-size:.88rem;color:var(--mut)}
.navlinks a{transition:color .2s}
.navlinks a:hover{color:var(--ink)}

/* ---------- buttons ---------- */
.btn{display:inline-block;padding:.75rem 1.5rem;border-radius:999px;background:var(--grad);color:#04121a;font-family:var(--font-d);font-weight:600;font-size:.92rem;letter-spacing:.02em;transition:transform .25s cubic-bezier(.2,.8,.2,1),box-shadow .25s;will-change:transform}
.btn:hover{transform:translateY(-2px) scale(1.02);box-shadow:0 10px 34px rgba(45,212,196,.35)}
.btn-sm{padding:.55rem 1.15rem;font-size:.82rem}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--teal);box-shadow:0 6px 24px rgba(45,212,196,.15)}

/* ---------- shared section head ---------- */
section{position:relative;padding:clamp(90px,12vh,150px) clamp(20px,6vw,84px)}
.eyebrow.tag{display:inline-block;font-family:var(--font-d);font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;color:var(--teal);border:1px solid rgba(45,212,196,.3);padding:.35rem .8rem;border-radius:999px;margin-bottom:1.4rem}
.sec-head{max-width:900px;margin-bottom:clamp(2.5rem,6vh,4rem)}
h1,h2,h3,h4{font-family:var(--font-d);letter-spacing:-.02em}
h2{font-size:clamp(1.9rem,4.2vw,3rem);line-height:1.12;font-weight:600}
.sec-sub{color:var(--mut);margin-top:1rem;max-width:560px}

/* ---------- hero ---------- */
.hero{min-height:100svh;display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(2rem,5vw,5rem);align-items:center;padding-top:130px;max-width:1400px;margin:0 auto}
.hero-grid{position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 30% 40%,#000 30%,transparent 70%);
          mask-image:radial-gradient(ellipse 70% 60% at 30% 40%,#000 30%,transparent 70%);
  opacity:.5}
.hero-copy{position:relative;z-index:2}
.cascade{font-size:clamp(2.7rem,6.2vw,5.2rem);line-height:1.04;font-weight:600}
.cascade .line{display:block;opacity:0;transform:translateY(38px);animation:rise .9s cubic-bezier(.2,.8,.2,1) forwards}
.cascade .l1{animation-delay:.15s}
.cascade .l2{animation-delay:.32s}
.cascade .l2 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.cascade .l3{animation-delay:.5s;font-size:.62em;font-weight:400;color:var(--mut);letter-spacing:0;margin-top:.35rem}
@keyframes rise{to{opacity:1;transform:none}}
.hero-sub{margin:1.6rem 0 2.2rem;color:var(--mut);max-width:590px;font-size:1.06rem}
.hero-sub strong{color:var(--ink);font-weight:600}
.cta-row{display:flex;gap:1rem;flex-wrap:wrap}

/* hero terminal */
.hero-terminal{position:relative;background:rgba(10,22,32,.7);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.5),0 0 0 1px rgba(45,212,196,.06) inset;backdrop-filter:blur(8px)}
.term-bar{display:flex;align-items:center;gap:7px;padding:.7rem .95rem;border-bottom:1px solid var(--line);background:rgba(255,255,255,.02)}
.term-bar .dot{width:10px;height:10px;border-radius:50%;background:#1d3342}
.term-bar .dot:first-child{background:rgba(45,212,196,.6)}
.term-bar code{margin-left:.5rem;font-size:.72rem;color:var(--mut);letter-spacing:.05em}
.hero-terminal pre{padding:1.3rem 1.15rem;font-size:.82rem;line-height:2;font-family:ui-monospace,"SF Mono",Menlo,monospace;color:#aebcc7;white-space:pre-wrap}
.cursor{color:var(--teal);animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

.scroll-cue{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);width:26px;height:42px;border:1.5px solid var(--line);border-radius:14px;display:flex;justify-content:center;padding-top:8px}
.scroll-cue span{width:4px;height:8px;border-radius:2px;background:var(--teal);animation:cue 1.6s ease-in-out infinite}
@keyframes cue{0%{transform:translateY(0);opacity:1}70%{transform:translateY(14px);opacity:0}100%{opacity:0}}

/* ---------- method ---------- */
.method{position:relative}
.spine{position:absolute;left:calc(clamp(20px,6vw,84px) + 5px);top:15%;bottom:12%;width:2px;background:var(--line)}
.spine i{display:block;width:100%;height:0;background:var(--grad);transition:height .3s linear}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(1.2rem,3vw,2.4rem);position:relative}
.step{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:clamp(1.6rem,3vw,2.4rem);position:relative;transition:transform .35s cubic-bezier(.2,.8,.2,1),border-color .3s,box-shadow .3s}
.step::before{content:"";position:absolute;left:-6px;top:2.6rem;width:12px;height:12px;border-radius:50%;background:var(--grad);box-shadow:0 0 12px rgba(45,212,196,.5)}
.step:hover{transform:translateY(-6px);border-color:rgba(45,212,196,.4);box-shadow:0 24px 60px rgba(0,0,0,.45)}
.step-n{font-family:var(--font-d);font-size:.78rem;letter-spacing:.2em;color:var(--teal)}
.step h3{margin:.8rem 0 .7rem;font-size:1.3rem}
.step p{color:var(--mut);font-size:.94rem}

/* ---------- impact ---------- */
.impact{background:linear-gradient(180deg,var(--bg) 0%,var(--bg2) 50%,var(--bg) 100%)}
.impact-frame{display:grid;grid-template-columns:1fr 60px 1fr;align-items:stretch;gap:0;max-width:1050px;margin:0 auto}
.impact-card{border-radius:var(--r);padding:clamp(1.5rem,3vw,2.4rem);border:1px solid var(--line)}
.impact-card.before{background:rgba(255,255,255,.015)}
.impact-card.after{background:linear-gradient(160deg,rgba(45,212,196,.07),rgba(56,189,248,.05));border-color:rgba(45,212,196,.35)}
.impact-card h4{font-size:.8rem;letter-spacing:.2em;text-transform:uppercase;color:var(--mut);margin-bottom:1.3rem}
.impact-card.after h4{color:var(--teal)}
.impact-card ul{list-style:none;display:grid;gap:1rem}
.impact-card li{display:flex;flex-direction:column;padding-bottom:1rem;border-bottom:1px solid var(--line)}
.impact-card li:last-child{border-bottom:none;padding-bottom:0}
.impact-card li span{font-size:.8rem;color:var(--mut);margin-bottom:.15rem}
.impact-card li b{font-family:var(--font-d);font-size:1.02rem;font-weight:500}
.flip{display:flex;align-items:center;justify-content:center}
.flip svg{width:34px;height:34px;filter:drop-shadow(0 0 10px rgba(45,212,196,.4));animation:pulseArrow 2.4s ease-in-out infinite}
@keyframes pulseArrow{0%,100%{transform:translateX(0)}50%{transform:translateX(6px)}}

/* ---------- disciplines ---------- */
.track{display:flex;gap:clamp(1rem,2.5vw,1.8rem);overflow-x:auto;padding:0 clamp(20px,6vw,84px) 1.4rem;margin:0 calc(clamp(20px,6vw,84px) * -1);scroll-snap-type:x mandatory;scrollbar-width:thin;scrollbar-color:var(--line) transparent}
.chip{flex:0 0 clamp(255px,26vw,320px);scroll-snap-align:start;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:1.9rem 1.7rem;transition:transform .35s cubic-bezier(.2,.8,.2,1),border-color .3s}
.chip:hover{transform:translateY(-6px);border-color:rgba(45,212,196,.4)}
.chip h3{font-size:1.15rem;margin-bottom:.6rem}
.chip p{color:var(--mut);font-size:.9rem}
.track::-webkit-scrollbar{height:4px}
.track::-webkit-scrollbar-thumb{background:var(--line);border-radius:2px}

/* ---------- faq ---------- */
.faq-list{max-width:820px;display:grid;gap:.7rem}
details{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:1.15rem 1.4rem;transition:border-color .3s}
details[open]{border-color:rgba(45,212,196,.35)}
details summary{cursor:pointer;font-family:var(--font-d);font-weight:500;font-size:1.02rem;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:1rem}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";font-weight:300;color:var(--teal);font-size:1.4rem;transition:transform .3s;flex:0 0 auto}
details[open] summary::after{transform:rotate(45deg)}
details p{color:var(--mut);font-size:.94rem;margin-top:.9rem}

/* ---------- cta ---------- */
.cta{text-align:center;padding-top:clamp(110px,15vh,180px);padding-bottom:clamp(110px,15vh,180px)}
.cta-inner{max-width:760px;margin:0 auto}
.cta h2{font-size:clamp(1.9rem,4.5vw,3.2rem)}
.cta p{color:var(--mut);margin:1.3rem auto 2.4rem;max-width:480px}
.cta-actions{display:grid;gap:.9rem;justify-items:center}
.magnetic{will-change:transform}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--line);padding:3rem clamp(20px,6vw,84px) 2rem;background:var(--bg2)}
.foot-top{display:flex;justify-content:space-between;align-items:center;gap:2rem;flex-wrap:wrap;margin-bottom:2rem}
.foot-top nav{display:flex;gap:clamp(.9rem,2vw,1.8rem);font-size:.85rem;color:var(--mut);flex-wrap:wrap}
.foot-top nav a:hover{color:var(--ink)}
.foot-bot{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.78rem;color:var(--mut);border-top:1px solid var(--line);padding-top:1.4rem}

/* ---------- newsletter popup ---------- */
.popup-overlay{position:fixed;inset:0;background:rgba(3,7,11,.7);backdrop-filter:blur(6px);z-index:200;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .45s}
.popup-overlay.show{opacity:1;pointer-events:auto}
.popup{position:relative;width:min(430px,calc(100vw - 40px));background:#0b1620;border:1px solid rgba(45,212,196,.25);border-radius:18px;padding:2.3rem 2.1rem 1.8rem;text-align:center;box-shadow:0 40px 100px rgba(0,0,0,.6),0 0 80px rgba(45,212,196,.08);transform:translateY(30px) scale(.96);transition:transform .45s cubic-bezier(.2,.9,.25,1.4)}
.popup-overlay.show .popup{transform:none}
.popup-x{position:absolute;top:12px;right:14px;background:none;border:0;color:var(--mut);font-size:1.5rem;cursor:pointer;line-height:1;transition:color .2s}
.popup-x:hover{color:var(--ink)}
.pop-mark{width:44px;height:44px;margin-bottom:1.1rem}
.popup h3{font-size:1.35rem;margin-bottom:.7rem}
.popup>p{color:var(--mut);font-size:.9rem;margin-bottom:1.5rem}
.popup form{display:grid;gap:.7rem}
.popup input{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:10px;padding:.85rem 1rem;color:var(--ink);font-size:.95rem;outline:none;transition:border-color .25s,box-shadow .25s}
.popup input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(45,212,196,.15)}
.popup-msg{font-size:.85rem;min-height:1.2em;margin:0 !important}
.popup-msg.ok{color:var(--teal)}
.popup-msg.err{color:#f87171}

/* ---------- reveal system ---------- */
.reveal{opacity:0;transform:translateY(32px);transition:opacity .8s cubic-bezier(.2,.8,.2,1),transform .8s cubic-bezier(.2,.8,.2,1)}
.reveal.d1{transition-delay:.12s}.reveal.d2{transition-delay:.24s}.reveal.d3{transition-delay:.38s}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:920px){
  .hero{grid-template-columns:1fr;padding-top:110px}
  .hero-terminal{display:none}
  .steps{grid-template-columns:1fr;gap:1rem}
  .spine{display:none}
  .impact-frame{grid-template-columns:1fr;gap:1.2rem}
  .flip{transform:rotate(90deg)}
  .navlinks{display:none}
}
@media(max-width:520px){
  body{font-size:15.5px}
  .cta-row{flex-direction:column;align-items:stretch}
  .btn{text-align:center}
  details summary{min-height:44px}
  .nav .btn-sm{min-height:44px;display:inline-flex;align-items:center}
  .foot-top nav a,.foot-bot a{padding:.4rem .2rem;min-height:44px;display:inline-flex;align-items:center}
  .popup-x{width:44px;height:44px;top:6px;right:6px;font-size:1.3rem}
}

/* ---------- reduced motion ---------- */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
  .cascade .line{opacity:1;transform:none}
}