/* Thinking Level — site styles */

@font-face{
  font-family:"Outfit";
  font-style:normal;
  font-weight:300 800;
  font-display:swap;
  src:url(../fonts/outfit-latin.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}

:root{
  --bg:#03051d;
  --surface:rgba(255,255,255,.035);
  --line:rgba(255,255,255,.09);
  --text:#eef1ff;
  --muted:#a6aed3;
  --dim:#6f78a3;
  --c1:#13d4fb;
  --c2:#2f6bff;
  --c3:#8a3bfb;
  --grad:linear-gradient(90deg,var(--c1),var(--c2) 55%,var(--c3));
  --ease:cubic-bezier(.2,.7,.2,1);
  --max:1180px;
  --pad:clamp(16px,4vw,32px);
  --font:"Outfit",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  color-scheme:dark;
}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:80px}
body{margin:0;background:var(--bg);color:var(--text);font:400 17px/1.6 var(--font);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--c1);outline-offset:3px;border-radius:6px}
h1,h2,h3{margin:0;font-weight:600;letter-spacing:-.02em;line-height:1.1}
h2{font-size:clamp(2rem,4.2vw,3.1rem)}
p{margin:0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.eyebrow{font-size:.78rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-bottom:18px}
.section{padding:clamp(72px,10vw,128px) 0;position:relative}
.section-head{max-width:640px;margin-bottom:clamp(40px,6vw,72px)}
.skip{position:absolute;left:16px;top:-60px;z-index:50;padding:10px 16px;border-radius:10px;background:var(--text);color:var(--bg);font-weight:500;transition:top .2s}
.skip:focus{top:12px}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:20;background:rgba(3,5,29,.82);border-bottom:1px solid transparent;transition:border-color .3s}
@supports (backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px)){
  .nav{background:rgba(3,5,29,.7);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
}
.nav.scrolled{border-bottom-color:var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:1.12rem;letter-spacing:-.01em;white-space:nowrap}
.brand .mark{width:34px;height:31px;flex:none;object-fit:contain;border-radius:3px}
.nav-links{display:flex;gap:clamp(16px,3vw,32px);font-size:.95rem;color:var(--muted)}
.nav-links a{transition:color .2s}
.nav-links a:hover{color:var(--text)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;height:50px;padding:0 24px;border-radius:999px;font-weight:500;font-size:1rem;transition:transform .2s,box-shadow .25s,background-color .2s,border-color .2s}
.btn svg{width:16px;height:16px;transition:transform .2s}
.btn:hover svg{transform:translateX(3px)}
.btn-primary{background:var(--text);color:#060824}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 10px 34px -10px var(--c2)}
.btn-ghost{border:1px solid var(--line);color:var(--text)}
.btn-ghost:hover{border-color:rgba(255,255,255,.28);background:var(--surface)}

/* ---------- hero ---------- */
.hero{position:relative;padding:clamp(48px,8vw,112px) 0 clamp(64px,8vw,112px);overflow:hidden;isolation:isolate}
.hero::before{content:"";position:absolute;z-index:-1;width:min(720px,80vw);aspect-ratio:1;right:-8%;top:50%;transform:translateY(-50%);background:radial-gradient(closest-side,rgba(47,107,255,.24),rgba(138,59,251,.07) 50%,transparent 72%)}
.hero::after{content:"";position:absolute;z-index:-1;inset:0;background:radial-gradient(rgba(255,255,255,.13) 1px,transparent 1.6px) 0 0/24px 24px;-webkit-mask:radial-gradient(60% 70% at 80% 40%,#000,transparent 75%);mask:radial-gradient(60% 70% at 80% 40%,#000,transparent 75%)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:clamp(24px,4vw,64px);align-items:center}
.hero h1{font-size:clamp(2.6rem,5.6vw,4.3rem);line-height:1.02;letter-spacing:-.035em}
.lede{font-size:clamp(1.05rem,1.6vw,1.24rem);color:var(--muted);max-width:38ch;margin:24px 0 36px}
.cta{display:flex;flex-wrap:wrap;gap:12px}

/* stairs: apps take turns on each step (see site.js) */
.hero-art{position:relative;width:118%;margin-left:-6%}
.stairs{width:100%;height:auto;overflow:visible}
.stairs .blk{animation:rise 1s var(--ease) both}
.stairs .blk:nth-of-type(2){animation-delay:.12s}
.stairs .blk:nth-of-type(3){animation-delay:.24s}
@keyframes rise{from{opacity:0;transform:translateY(40px)}}
.rider{position:absolute;width:12.67%;aspect-ratio:1/1.16;transform:translate(-50%,-100%);transition:left .64s linear .08s,top .64s linear .08s}
.rider.jump{transition:none}
.hop{display:block;transform-origin:50% 100%}
.rider img{width:100%;height:auto;aspect-ratio:1;border-radius:22%;animation:float 5s ease-in-out infinite;filter:drop-shadow(0 14px 18px rgba(0,0,0,.45))}
.shw{position:absolute;z-index:-1;left:11%;bottom:0;width:78%;aspect-ratio:5/1;margin-bottom:-7.8%}
.sh{display:block;width:100%;height:100%;border-radius:50%;background:radial-gradient(closest-side,rgba(0,0,12,.6),transparent);animation:shadow 5s ease-in-out infinite}
.rider:nth-of-type(2) img,.rider:nth-of-type(2) .sh{animation-delay:-1.6s}
.rider:nth-of-type(3) img,.rider:nth-of-type(3) .sh{animation-delay:-3.2s}
@keyframes float{50%{transform:translateY(-8px)}}
@keyframes shadow{50%{transform:scale(.75);opacity:.55}}
/* jump to the next step: crouch, arc, squash on landing */
.hop.is-hop{animation:hop .8s linear}
.hop.is-exit{animation:hop-exit .8s linear forwards}
.hop.is-enter{animation:hop-enter .8s linear}
.shw.is-hop{animation:sh-hop .8s linear}
.shw.is-exit{animation:sh-exit .8s linear forwards}
.shw.is-enter{animation:sh-enter .8s linear}
@keyframes hop{
  0%{transform:translateY(0) scale(1,1)}
  10%{transform:translateY(0) scale(1.08,.9);animation-timing-function:cubic-bezier(.33,1,.68,1)}
  50%{transform:translateY(-95%) scale(.96,1.05);animation-timing-function:cubic-bezier(.32,0,.67,0)}
  88%{transform:translateY(0) scale(1.1,.88)}
  100%{transform:translateY(0) scale(1,1)}
}
/* top app jumps forward off the stairs and fades; the next one jumps in from before the first step */
@keyframes hop-exit{
  0%{transform:translateY(0) scale(1,1);opacity:1}
  10%{transform:translateY(0) scale(1.08,.9);animation-timing-function:cubic-bezier(.33,1,.68,1)}
  40%{opacity:1}
  50%{transform:translateY(-95%) scale(.96,1.05);animation-timing-function:cubic-bezier(.32,0,.67,0)}
  85%{opacity:0}
  100%{transform:translateY(0) scale(.9,.9);opacity:0}
}
@keyframes hop-enter{
  0%{transform:translateY(0) scale(1,1);opacity:0}
  10%{transform:translateY(0) scale(1.08,.9);animation-timing-function:cubic-bezier(.33,1,.68,1)}
  35%{opacity:1}
  50%{transform:translateY(-95%) scale(.96,1.05);animation-timing-function:cubic-bezier(.32,0,.67,0)}
  88%{transform:translateY(0) scale(1.1,.88)}
  100%{transform:translateY(0) scale(1,1);opacity:1}
}
@keyframes sh-hop{0%,10%{transform:scale(1);opacity:1}50%{transform:scale(.4);opacity:0}88%,100%{transform:scale(1);opacity:1}}
@keyframes sh-exit{0%,10%{transform:scale(1);opacity:1}45%,100%{transform:scale(.4);opacity:0}}
@keyframes sh-enter{0%,60%{transform:scale(.4);opacity:0}88%,100%{transform:scale(1);opacity:1}}

/* ---------- apps ---------- */
.product-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;align-items:stretch;padding-top:28px}
.product{position:relative;display:flex;flex-direction:column;padding:32px 28px 30px;border:1px solid var(--line);border-top:0;border-radius:0 0 20px 20px;background:rgba(255,255,255,.03);background:linear-gradient(180deg,color-mix(in srgb,var(--accent) 11%,transparent),rgba(255,255,255,.012) 65%);transition:translate .3s var(--ease)}
.product:hover{translate:0 -6px}
.product::before{content:"";position:absolute;left:-1px;right:-1px;top:-16px;height:16px;background:var(--accent);background:linear-gradient(90deg,var(--accent),color-mix(in srgb,var(--accent) 55%,transparent));clip-path:polygon(16px 0,100% 0,calc(100% - 16px) 100%,0 100%);opacity:.9;transition:opacity .3s}
.product:hover::before{opacity:1}
.p-icon{width:60px;height:60px;border-radius:16px;flex:none;margin-bottom:22px}
.p-icon--ring{box-shadow:0 0 0 1px rgba(255,255,255,.12)}
.p-body{flex:1}
.p-name{font-size:1.55rem;letter-spacing:-.02em}
.p-tag{color:var(--accent);font-weight:500;margin:4px 0 12px}
.p-desc{color:var(--muted);font-size:.98rem;margin-bottom:20px}
.p-platforms{list-style:none;padding:0;margin:0 0 24px;display:flex;flex-wrap:wrap;gap:6px}
.p-platforms li{font-size:.76rem;padding:3px 10px;border:1px solid var(--line);border-radius:999px;color:var(--muted)}
.p-links{display:flex;gap:20px;align-items:center;font-size:.95rem;flex-wrap:wrap}
.p-site{font-weight:500;display:inline-flex;align-items:center;gap:6px}
.p-site svg{width:16px;height:16px;transition:transform .2s}
.p-site:hover svg{transform:translateX(3px)}
.p-store{color:var(--muted);transition:color .2s}
.p-store:hover{color:var(--text)}

/* ---------- principles ---------- */
.pr-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(20px,3vw,40px);counter-reset:pr}
.pr-list li{counter-increment:pr;padding-top:24px;border-top:1px solid var(--line)}
.pr-list li::before{content:counter(pr,decimal-leading-zero);display:block;font-size:.85rem;color:var(--dim);margin-bottom:18px;font-variant-numeric:tabular-nums}
.pr-list h3{font-size:1.3rem;margin-bottom:10px}
.pr-list p{color:var(--muted)}

/* ---------- about ---------- */
.about-grid{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:clamp(32px,6vw,96px);align-items:center}
.about-mark{position:relative;aspect-ratio:1;display:grid;place-items:center;border-radius:32px;background:radial-gradient(closest-side,rgba(47,107,255,.22),transparent 75%)}
.about-mark img{width:76%;max-width:340px;height:auto;aspect-ratio:1;border-radius:24px}
.about .body{color:var(--muted);font-size:clamp(1.05rem,1.5vw,1.2rem);margin-top:22px;max-width:52ch}

/* ---------- contact ---------- */
.contact-inner{text-align:center;max-width:820px;margin:0 auto}
.contact p{color:var(--muted);margin:18px 0 34px;font-size:1.1rem}
.mail{display:inline-flex;align-items:center;gap:14px;font-size:clamp(1.4rem,4vw,2.6rem);font-weight:500;letter-spacing:-.02em;padding-bottom:6px;background:var(--grad) left bottom/0 2px no-repeat;transition:background-size .45s var(--ease)}
.mail:hover{background-size:100% 2px}
.mail svg{width:.8em;height:.8em;transition:transform .25s}
.mail:hover svg{transform:translateX(5px)}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--line);padding:56px 0 32px;font-size:.93rem;color:var(--muted)}
.f-top{display:grid;grid-template-columns:1.5fr 1fr 1.4fr 1fr;gap:32px}
.f-brand p{margin-top:14px;max-width:28ch}
.f-col h2{font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);font-weight:600;margin-bottom:16px}
.f-col a,.f-col p{display:block;margin-bottom:10px}
.f-col p a{display:inline;margin:0}
.f-col a{transition:color .2s}
.f-col a:hover{color:var(--text)}
.f-col .sep{color:var(--dim);margin:0 6px}
.f-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:48px;padding-top:24px;border-top:1px solid var(--line);color:var(--dim);font-size:.85rem}

/* ---------- reveal on scroll ---------- */
.js .reveal{opacity:0;transform:translateY(28px)}
.js .reveal.in{opacity:1;transform:none;transition:opacity .9s var(--ease) var(--d,0ms),transform .9s var(--ease) var(--d,0ms)}
.js .product.reveal.in{transition:opacity .9s var(--ease) var(--d,0ms),transform .9s var(--ease) var(--d,0ms),translate .3s var(--ease)}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr}
  .hero-art{max-width:520px;width:100%;margin:8px 0 0}
  .product-list{grid-template-columns:1fr;gap:44px}
  .pr-list{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr}
  .about-mark{max-width:260px}
  .f-top{grid-template-columns:1fr 1fr}
  .f-brand{grid-column:1/-1}
}
@media (max-width:640px){
  .f-top{grid-template-columns:1fr}
}
@media (max-width:420px){
  .brand{font-size:1rem}
  .brand .mark{width:30px;height:27px}
  .nav-links{font-size:.9rem}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .js .reveal{opacity:1;transform:none}
}