:root{
  --bg:#05050c; --bg2:#0b0b1a; --text:#ecebff; --muted:#9b9bbd;
  --v:#7c3aed; --b:#2563eb; --c:#06b6d4; --p:#ec4899;
  --card:rgba(255,255,255,.045); --stroke:rgba(255,255,255,.1);
  --grad:linear-gradient(135deg,var(--v),var(--b) 55%,var(--c));
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  color:var(--text);background:var(--bg);min-height:100vh;overflow-x:hidden;line-height:1.55;
  padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
a{color:inherit;text-decoration:none}

/* ===== Animated background ===== */
.bg{position:fixed;inset:0;z-index:-2;overflow:hidden;
  background:radial-gradient(120% 90% at 50% 0%,#12102b 0%,var(--bg) 60%)}
.blob{position:absolute;border-radius:50%;filter:blur(90px);opacity:.55;will-change:transform}
.blob.b1{width:52vmax;height:52vmax;left:-15vmax;top:-18vmax;background:var(--v);animation:f1 22s ease-in-out infinite}
.blob.b2{width:46vmax;height:46vmax;right:-14vmax;top:12vmax;background:var(--b);animation:f2 26s ease-in-out infinite}
.blob.b3{width:40vmax;height:40vmax;left:10vmax;bottom:-18vmax;background:var(--c);opacity:.4;animation:f3 30s ease-in-out infinite}
.blob.b4{width:30vmax;height:30vmax;right:8vmax;bottom:-8vmax;background:var(--p);opacity:.25;animation:f1 34s ease-in-out infinite reverse}
@keyframes f1{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(9vmax,7vmax) scale(1.18)}}
@keyframes f2{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-10vmax,8vmax) scale(.88)}}
@keyframes f3{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(8vmax,-9vmax) scale(1.12)}}
.grid-bg{position:absolute;inset:0;opacity:.35;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(70% 60% at 50% 35%,#000 20%,transparent 75%);
  mask-image:radial-gradient(70% 60% at 50% 35%,#000 20%,transparent 75%);
  animation:grid 18s linear infinite}
@keyframes grid{to{background-position:56px 56px}}
#fx{position:fixed;inset:0;z-index:-1;width:100%;height:100%;pointer-events:none}
.noise{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.05;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='2'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>")}

/* ===== Layout ===== */
.wrap{max-width:980px;margin:0 auto;padding:0 20px}
header.top{display:flex;align-items:center;justify-content:space-between;padding:20px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.3px}
.brand img{width:34px;height:34px}
nav.top a{padding:8px 14px;border-radius:999px;color:var(--muted);font-size:.92rem;transition:.25s}
nav.top a:hover{color:#fff;background:rgba(255,255,255,.07)}

.hero{text-align:center;padding:56px 0 34px}
.badge{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border:1px solid var(--stroke);
  background:var(--card);border-radius:999px;font-size:.82rem;color:var(--muted);backdrop-filter:blur(10px)}
.dot{width:8px;height:8px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 0 rgba(34,197,94,.7);animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 10px rgba(34,197,94,0)}100%{box-shadow:0 0 0 0 rgba(34,197,94,0)}}
h1{font-size:clamp(2.2rem,7vw,4.4rem);line-height:1.05;margin:20px 0 14px;font-weight:800;letter-spacing:-1.5px}
.grad{background:linear-gradient(90deg,var(--v),var(--b),var(--c),var(--p),var(--v));background-size:300% 100%;
  -webkit-background-clip:text;background-clip:text;color:transparent;animation:shine 7s linear infinite}
@keyframes shine{to{background-position:300% 0}}
.hero p.lead{max-width:600px;margin:0 auto;color:var(--muted);font-size:clamp(1rem,2.6vw,1.15rem)}
.avatar{width:92px;height:92px;margin:0 auto 6px;position:relative;display:grid;place-items:center}
.avatar::before{content:"";position:absolute;inset:-4px;border-radius:50%;background:conic-gradient(var(--v),var(--b),var(--c),var(--p),var(--v));animation:spin 6s linear infinite;filter:blur(1px)}
.avatar::after{content:"";position:absolute;inset:2px;border-radius:50%;background:var(--bg2)}
.avatar img{width:56px;height:56px;position:relative;z-index:1}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== Link cards ===== */
.links{display:grid;grid-template-columns:1fr;gap:14px;padding:18px 0 40px}
@media(min-width:640px){.links{grid-template-columns:1fr 1fr;gap:16px}}
.card{
  --mx:50%;--my:50%;--accent:var(--b);
  position:relative;display:flex;align-items:center;gap:16px;padding:18px 18px;border-radius:20px;
  background:var(--card);border:1px solid var(--stroke);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  overflow:hidden;transition:transform .3s cubic-bezier(.2,.8,.2,1),border-color .3s,box-shadow .3s;
  opacity:0;transform:translateY(26px);
}
.card.in{opacity:1;transform:none;transition:opacity .7s ease,transform .7s cubic-bezier(.2,.8,.2,1),border-color .3s,box-shadow .3s}
.card::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .3s;
  background:radial-gradient(260px circle at var(--mx) var(--my),color-mix(in srgb,var(--accent) 35%,transparent),transparent 70%)}
.card:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--accent) 60%,transparent);
  box-shadow:0 18px 50px -18px var(--accent)}
.card:hover::before{opacity:1}
.card:active{transform:scale(.98)}
.ico{flex:none;width:52px;height:52px;border-radius:15px;display:grid;place-items:center;position:relative;z-index:1;
  background:color-mix(in srgb,var(--accent) 18%,transparent);border:1px solid color-mix(in srgb,var(--accent) 40%,transparent);
  color:var(--accent);transition:.3s}
.card:hover .ico{background:var(--accent);color:#fff;transform:rotate(-6deg) scale(1.06)}
.ico svg{width:26px;height:26px;fill:currentColor}
.txt{position:relative;z-index:1;min-width:0;flex:1}
.txt h2{font-size:1.04rem;font-weight:700}
.txt p{font-size:.86rem;color:var(--muted);margin-top:2px}
.txt small{display:block;font-size:.74rem;color:color-mix(in srgb,var(--accent) 70%,#fff);opacity:.85;margin-top:5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.arrow{position:relative;z-index:1;flex:none;width:22px;height:22px;color:var(--muted);transition:.3s}
.card:hover .arrow{color:#fff;transform:translateX(4px)}
.card.wide{grid-column:1/-1}
.sec-title{font-size:.78rem;letter-spacing:2px;text-transform:uppercase;color:var(--muted);margin:18px 4px 2px;grid-column:1/-1}

/* ===== Footer / buttons ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:999px;font-weight:600;background:var(--grad);
  box-shadow:0 10px 30px -10px var(--b);transition:.3s}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 36px -8px var(--c)}
footer{text-align:center;color:var(--muted);font-size:.84rem;padding:30px 0 40px;border-top:1px solid var(--stroke)}
footer a{color:#cfd0ff}footer a:hover{text-decoration:underline}

/* ===== Docs ===== */
.doc{padding:30px 0 20px}
.doc h1{font-size:clamp(2rem,6vw,3.2rem);text-align:left}
.doc h2{font-size:1.4rem;margin:38px 0 10px;scroll-margin-top:20px}
.doc h3{font-size:1.05rem;margin:18px 0 6px;color:#fff}
.doc p,.doc li{color:#c4c4e0}
.doc ul,.doc ol{padding-left:22px;margin:8px 0}
.doc li{margin:5px 0}
.panel{padding:20px;border-radius:18px;background:var(--card);border:1px solid var(--stroke);backdrop-filter:blur(12px);margin:14px 0}
code{font-family:ui-monospace,Menlo,Consolas,monospace;background:rgba(255,255,255,.08);padding:2px 7px;border-radius:7px;font-size:.88em;color:#bfe9ff}
pre{background:#0a0a18;border:1px solid var(--stroke);border-radius:14px;padding:16px;overflow:auto;margin:12px 0}
pre code{background:none;padding:0;color:#d9dcff}
.toc{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0}
.toc a{padding:7px 14px;border-radius:999px;border:1px solid var(--stroke);background:var(--card);font-size:.85rem;color:var(--muted);transition:.25s}
.toc a:hover{color:#fff;border-color:var(--b)}
.link-doc{display:flex;gap:14px;align-items:flex-start}
.link-doc .ico{width:44px;height:44px}
.link-doc .ico svg{width:22px;height:22px}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .card{opacity:1;transform:none}
}

/* =====================================================
   v2: transitions, intro animation, polish
   ===================================================== */
:root{color-scheme:dark;--ease:cubic-bezier(.16,1,.3,1)}
.txt h3{font-size:1.04rem;font-weight:700}
.sec-title{font-weight:600}
.txt{display:block}

/* ---- Cross-page View Transitions (Chrome, Edge, Safari 18.2+) ---- */
@media (prefers-reduced-motion:no-preference){@view-transition{navigation:auto}}
.bg{view-transition-name:site-bg}
#fx{view-transition-name:site-fx}
header.top{view-transition-name:site-header}
footer{view-transition-name:site-footer}
main{view-transition-name:page}
::view-transition-old(site-bg),::view-transition-new(site-bg){animation:none;mix-blend-mode:normal}
::view-transition-old(site-fx),::view-transition-old(site-header),::view-transition-old(site-footer){display:none}
::view-transition-new(site-fx),::view-transition-new(site-header),::view-transition-new(site-footer){animation:none}
::view-transition-old(page){animation:vt-out .32s cubic-bezier(.4,0,1,1) both}
::view-transition-new(page){animation:vt-in .6s var(--ease) .08s both}
@keyframes vt-out{to{opacity:0;transform:translateY(-14px) scale(.985);filter:blur(6px)}}
@keyframes vt-in{from{opacity:0;transform:translateY(26px) scale(.985);filter:blur(8px)}}
::view-transition-group(root){animation-duration:.3s}

/* ---- Fallback for browsers without cross-document transitions ---- */
main{transition:opacity .3s ease,transform .3s ease,filter .3s ease}
html.leaving main{opacity:0;transform:translateY(-12px);filter:blur(6px)}

/* ---- Intro (staggered) ---- */
@keyframes rise{from{opacity:0;transform:translateY(24px) scale(.97);filter:blur(10px)}to{opacity:1;transform:none;filter:none}}
.hero>*,.doc>h1,.doc>p:first-of-type,.doc>.toc{animation:rise .95s var(--ease) both}
.hero>:nth-child(1){animation-delay:.05s}
.hero>:nth-child(2){animation-delay:.15s}
.hero>:nth-child(3){animation-delay:.25s}
.hero>:nth-child(4){animation-delay:.35s}
.doc>h1{animation-delay:.05s}.doc>p:first-of-type{animation-delay:.15s}.doc>.toc{animation-delay:.25s}

/* ---- Scroll reveal for any block ---- */
.rv{opacity:0;transform:translateY(22px);transition:opacity .8s ease,transform .8s var(--ease)}
.rv.in{opacity:1;transform:none}

/* ---- Scroll progress + parallax ---- */
.progress{position:fixed;top:0;left:0;width:100%;height:3px;z-index:60;transform-origin:0 50%;transform:scaleX(0);
  background:linear-gradient(90deg,var(--v),var(--b),var(--c),var(--p));box-shadow:0 0 14px var(--b)}
.hero{transform:translate3d(0,calc(var(--sy,0)*.1px),0);opacity:calc(1 - var(--sy,0)/1000)}
.grid-bg{transform:translate3d(0,calc(var(--sy,0)*-.08px),0)}

/* ---- Cards: 3D tilt + ripple (fine pointers) ---- */
.card{will-change:transform}
.card.in:hover{
  transform:perspective(900px) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg)) translateY(-5px);
  transition:transform .15s ease-out,border-color .3s,box-shadow .3s;
}
.card:focus-visible,.btn:focus-visible,nav.top a:focus-visible,.toc a:focus-visible{outline:2px solid var(--c);outline-offset:3px}
.ripple{position:absolute;border-radius:50%;pointer-events:none;z-index:0;width:20px;height:20px;margin:-10px 0 0 -10px;
  background:color-mix(in srgb,var(--accent,#fff) 55%,transparent);transform:scale(0);animation:rip .7s ease-out forwards}
@keyframes rip{to{transform:scale(28);opacity:0}}
.btn{position:relative;overflow:hidden;will-change:transform}
.toc a.active{color:#fff;border-color:var(--c);background:rgba(6,182,212,.12)}

/* ---- 404 ---- */
.nf{min-height:70vh;display:grid;place-items:center;text-align:center}
.nf .big{font-size:clamp(5rem,26vw,11rem);font-weight:800;letter-spacing:-6px;line-height:1}

@media(prefers-reduced-motion:reduce){
  .hero,.hero>*,.rv{opacity:1!important;transform:none!important;filter:none!important}
}