/* Threshold Atlas — Liquid Gradient Flow */
:root{
  --bg:#f3f4fb; --ink:#191b2e; --ink-2:#3a3d55; --muted:#6b6f88; --line:#e6e7f3;
  --card:rgba(255,255,255,.72); --card-2:rgba(255,255,255,.58); --border:rgba(255,255,255,.75);
  --g1:#3fc7b7; --g2:#5b6cf0; --g3:#9a6cf0; --g4:#ff8a6b; --g5:#57b8ff;
  --accent:#5457e6; --accent-2:#8a5cf0;
  --grad:linear-gradient(120deg,#5b6cf0,#8a5cf0 46%,#3fc7b7);
  --grad-warm:linear-gradient(120deg,#7b6cf0,#ff8a6b);
  --radius:26px; --radius-sm:16px; --shell:1180px;
  --glass-sh:0 24px 60px -32px rgba(40,44,110,.5),inset 0 1px 0 rgba(255,255,255,.7);
  --f-display:"Sora",system-ui,sans-serif; --f-body:"Inter",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);
  font-size:17px;line-height:1.68;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.wrap{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:clamp(20px,5vw,44px)}
img{max-width:100%;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-2)}
h1,h2,h3,h4{font-family:var(--f-display);font-weight:700;color:var(--ink);line-height:1.14;margin:0;letter-spacing:-.02em}
p{margin:0 0 16px}
strong{font-weight:700}

/* ---- liquid gradient canvas ---- */
.bg{position:fixed;inset:0;z-index:-2;background:
  radial-gradient(60% 50% at 15% 10%,rgba(91,108,240,.12),transparent 60%),
  radial-gradient(50% 50% at 90% 15%,rgba(63,199,183,.12),transparent 60%),
  var(--bg);overflow:hidden}
.blob{position:absolute;border-radius:50%;filter:blur(72px);opacity:.5;will-change:transform}
.blob.b1{width:52vw;height:52vw;left:-12vw;top:-10vw;background:radial-gradient(circle at 30% 30%,#5b6cf0,transparent 70%);animation:drift1 26s ease-in-out infinite}
.blob.b2{width:46vw;height:46vw;right:-10vw;top:2vw;background:radial-gradient(circle at 40% 40%,#3fc7b7,transparent 70%);animation:drift2 30s ease-in-out infinite}
.blob.b3{width:42vw;height:42vw;left:20vw;bottom:-14vw;background:radial-gradient(circle at 50% 50%,#9a6cf0,transparent 70%);animation:drift3 34s ease-in-out infinite}
.blob.b4{width:34vw;height:34vw;right:8vw;bottom:-6vw;background:radial-gradient(circle at 50% 50%,#ff8a6b,transparent 72%);opacity:.32;animation:drift1 38s ease-in-out infinite reverse}
@keyframes drift1{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(6vw,4vw) scale(1.12)}}
@keyframes drift2{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-5vw,6vw) scale(1.08)}}
@keyframes drift3{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(4vw,-5vw) scale(1.14)}}

.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--f-body);font-weight:700;font-size:.74rem;
  letter-spacing:.14em;text-transform:uppercase;color:var(--accent);
  background:rgba(255,255,255,.6);border:1px solid var(--border);backdrop-filter:blur(8px);
  padding:7px 14px;border-radius:999px}
.eyebrow.plain{background:none;border:0;backdrop-filter:none;padding:0;color:var(--accent)}

/* ---- glass primitives ---- */
.glass{background:var(--card);backdrop-filter:blur(20px) saturate(1.3);-webkit-backdrop-filter:blur(20px) saturate(1.3);
  border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--glass-sh)}
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--f-display);font-weight:600;font-size:.95rem;
  padding:13px 26px;border-radius:999px;cursor:pointer;border:1px solid transparent;transition:transform .18s,box-shadow .25s;text-decoration:none}
.btn.primary{background:var(--grad);color:#fff;box-shadow:0 12px 30px -10px rgba(91,108,240,.6)}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px -12px rgba(91,108,240,.7);color:#fff}
.btn.ghost{background:rgba(255,255,255,.6);backdrop-filter:blur(10px);border-color:var(--border);color:var(--accent)}
.btn.ghost:hover{transform:translateY(-2px);color:var(--accent-2)}

/* ---- header ---- */
.site-head{position:sticky;top:0;z-index:70;background:rgba(243,244,251,.7);backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.6)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand .orb{width:34px;height:34px;border-radius:50%;background:var(--grad);box-shadow:0 6px 16px -4px rgba(91,108,240,.6);position:relative;flex:none}
.brand .orb::after{content:"";position:absolute;inset:6px 6px auto auto;width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.7)}
.brand b{font-family:var(--f-display);font-weight:700;font-size:1.22rem;color:var(--ink);letter-spacing:-.02em}
.nav{display:flex;align-items:center;gap:4px}
.nav a{font-weight:500;font-size:.9rem;color:var(--ink-2);padding:9px 14px;border-radius:999px;transition:.16s}
.nav a:hover,.nav a[aria-current=page]{background:rgba(255,255,255,.7);color:var(--accent)}
.nav .btn{margin-left:6px;padding:9px 18px}
.menu-btn{display:none;width:44px;height:44px;border:1px solid var(--border);border-radius:12px;background:rgba(255,255,255,.6);color:var(--ink);cursor:pointer;align-items:center;justify-content:center}

/* ---- hero ---- */
.hero{padding-block:clamp(44px,6vw,84px)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(30px,5vw,60px);align-items:center}
.hero h1{font-size:clamp(2.7rem,6.6vw,4.7rem);line-height:1.02;margin:18px 0 0;letter-spacing:-.03em}
.hero .deck{font-size:1.18rem;line-height:1.6;color:var(--ink-2);margin:22px 0 28px;max-width:52ch}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-figure{position:relative;padding:14px}
.hero-figure .glow{position:absolute;inset:-6% -4%;background:var(--grad);filter:blur(46px);opacity:.4;border-radius:40px;z-index:-1}
.hero-figure img{width:100%;height:auto;border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--glass-sh)}

/* ---- sections ---- */
section{padding-block:clamp(34px,5vw,60px)}
.sec-head{max-width:60ch;margin-bottom:28px}
.sec-head.center{margin-inline:auto;text-align:center}
.sec-head h2{font-size:clamp(1.8rem,3.6vw,2.6rem);margin:14px 0 0}
.sec-head p{color:var(--muted);margin:12px 0 0;font-size:1.05rem}

.panel{padding:clamp(26px,4vw,44px)}
.panel h2,.panel h3{letter-spacing:-.02em}
.panel h2{font-size:clamp(1.6rem,3vw,2.2rem);margin:0 0 14px;text-transform:capitalize}
.panel h3{font-size:1.4rem;margin:0 0 12px;text-transform:capitalize}
.panel p:last-child{margin-bottom:0}
.lede{font-size:1.12rem;line-height:1.66;color:var(--ink-2)}

.grid-2{display:grid;grid-template-columns:1.5fr 1fr;gap:24px;align-items:start}
.grid-2.rev{grid-template-columns:1fr 1.5fr}
@media(max-width:860px){.grid-2,.grid-2.rev{grid-template-columns:1fr}}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cards.two{grid-template-columns:repeat(2,1fr)}
.card{padding:26px 26px}
a.card{text-decoration:none;color:inherit;display:block;transition:transform .2s,box-shadow .25s}
a.card:hover{transform:translateY(-3px);box-shadow:0 30px 60px -30px rgba(60,50,140,.55)}
.card .ic{width:46px;height:46px;border-radius:14px;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;margin-bottom:14px;box-shadow:0 10px 22px -10px rgba(91,108,240,.7)}
.card h3{font-size:1.22rem;margin:0 0 6px}
.card p{margin:0;color:var(--muted);font-size:.95rem}
.card .go{font-weight:700;font-size:.82rem;color:var(--accent);margin-top:12px;display:inline-block}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.steps{grid-template-columns:1fr}}
.step{padding:24px 22px;position:relative}
.step .num{font-family:var(--f-display);font-weight:700;font-size:.9rem;color:#fff;background:var(--grad);width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.step h4{font-family:var(--f-display);font-size:1.08rem;margin:0 0 8px;letter-spacing:-.01em}
.step p{margin:0;font-size:.92rem;color:var(--muted)}

/* media frame */
figure.frame{padding:12px;margin:0}
figure.frame img{width:100%;height:auto;border-radius:var(--radius-sm);border:1px solid var(--border)}
figure.frame figcaption{font-size:.85rem;color:var(--muted);margin-top:12px;padding:0 6px}

/* pills */
.pills{display:flex;flex-wrap:wrap;gap:9px}
.pill{background:rgba(255,255,255,.65);border:1px solid var(--border);backdrop-filter:blur(8px);border-radius:999px;padding:8px 15px;font-weight:600;font-size:.88rem;color:var(--ink)}

/* note */
.note{padding:22px 24px;border-left:4px solid var(--accent)}
.note.warn{border-left-color:var(--g4)}
.note h3{font-size:1.1rem;margin:0 0 8px}
.note p{margin:0;font-size:.95rem;color:var(--ink-2)}

/* quote */
.pull{padding:30px clamp(24px,4vw,40px);margin:6px 0}
.pull blockquote{margin:0;font-family:var(--f-display);font-weight:600;font-size:clamp(1.3rem,2.5vw,1.75rem);line-height:1.32;letter-spacing:-.02em}
.pull blockquote .grad-text{font-weight:700}

/* faq */
.faq{display:grid;gap:12px;max-width:860px}
details.qa{padding:4px 24px;transition:.2s}
details.qa summary{list-style:none;cursor:pointer;padding:18px 0;font-family:var(--f-display);font-weight:600;font-size:1.08rem;
  display:flex;justify-content:space-between;align-items:center;gap:16px}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary .chev{flex:none;width:26px;height:26px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;transition:transform .22s}
details.qa[open] summary .chev{transform:rotate(45deg)}
details.qa .a{padding:0 0 20px;color:var(--ink-2)}
details.qa .a p{margin:0 0 10px;font-size:.98rem}
details.qa .a p:last-child{margin:0}

/* related */
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:820px){.related{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.related{grid-template-columns:1fr}}

/* cta band */
.cta-band{padding:clamp(30px,4vw,48px);display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:var(--grad);color:#fff;border-radius:var(--radius);box-shadow:0 30px 60px -30px rgba(91,108,240,.7)}
.cta-band h2{color:#fff;font-size:clamp(1.5rem,3vw,2.1rem);max-width:20ch;letter-spacing:-.02em}
.cta-band p{color:rgba(255,255,255,.9);margin:8px 0 0;max-width:46ch}
.cta-band .btn{background:#fff;color:var(--accent)}
.cta-band .btn:hover{color:var(--accent-2)}

/* page hero */
.pagehead{padding-block:clamp(40px,5vw,64px) 8px}
.pagehead .crumbs{font-size:.82rem;color:var(--muted);margin-bottom:12px}
.pagehead .crumbs a{color:var(--muted)}
.pagehead h1{font-size:clamp(2.2rem,5vw,3.4rem);letter-spacing:-.03em}
.pagehead p{font-size:1.15rem;color:var(--ink-2);margin:16px 0 0;max-width:60ch}
.prose h2{font-size:1.5rem;margin:26px 0 10px;text-transform:capitalize}
.prose h2:first-child{margin-top:0}
.prose ul{padding-left:20px}
.prose li{margin-bottom:8px}

/* footer */
.site-foot{margin-top:20px;color:#dfe1f2;position:relative}
.site-foot .inner{background:linear-gradient(120deg,#20223a,#2b2550);border-radius:var(--radius) var(--radius) 0 0;padding:46px 0 30px;position:relative;overflow:hidden}
.site-foot .inner::before{content:"";position:absolute;width:40vw;height:40vw;right:-10vw;top:-16vw;border-radius:50%;background:radial-gradient(circle,#5b6cf0,transparent 70%);opacity:.4;filter:blur(50px)}
.site-foot .cols{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:32px;position:relative}
.site-foot .brand b{color:#fff}
.site-foot .disc{font-size:.84rem;line-height:1.6;color:#a6a8c8;max-width:44ch;margin-top:14px}
.site-foot h4{font-family:var(--f-display);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:#8f92b8;margin:0 0 14px}
.site-foot ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.site-foot a{color:#dfe1f2;font-size:.92rem}
.site-foot a:hover{color:#fff}
.site-foot .legal{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.14);margin-top:28px;padding-top:20px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:.8rem;color:#9092b6}

.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
a:focus-visible,summary:focus-visible,button:focus-visible,.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

@media(max-width:860px){.hero-grid{grid-template-columns:1fr}.hero-figure{max-width:520px}.cards,.cards.two{grid-template-columns:1fr 1fr}}
@media(max-width:640px){
  body{font-size:16px}
  .nav{position:fixed;inset:72px 0 auto 0;background:rgba(243,244,251,.95);backdrop-filter:blur(16px);flex-direction:column;align-items:stretch;gap:2px;padding:12px clamp(20px,5vw,44px);transform:translateY(-150%);transition:transform .28s;border-bottom:1px solid var(--line)}
  .nav.open{transform:none}
  .nav a{padding:13px 12px}
  .nav .btn{margin:6px 0 0;justify-content:center}
  .menu-btn{display:inline-flex}
  .cards,.cards.two,.related{grid-template-columns:1fr}
  .site-foot .cols{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}.blob{animation:none!important}}