/* Shared primitives. Each page sets its own palette via --accent, --accent2, --bg, --fg, --muted, --line. */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font-body,system-ui,sans-serif);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:clip}
h1,h2,h3{text-wrap:balance}
p{text-wrap:pretty}

/* Intro loader (pure CSS timeline, never blocks the page) */
.loader{position:fixed;inset:0;z-index:200;display:grid;place-items:center;background:var(--bg);pointer-events:none;
  animation:loaderOut .9s cubic-bezier(.7,0,.2,1) 1.5s forwards}
.loader__in{display:grid;gap:14px;justify-items:center;font:500 .75rem/1 var(--font-mono,monospace);letter-spacing:.3em;text-transform:uppercase;color:var(--muted)}
.loader__bar{width:180px;height:1px;background:var(--line);overflow:hidden}
.loader__bar::after{content:"";display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));transform-origin:0;animation:loaderBar 1.3s cubic-bezier(.6,0,.2,1) forwards}
@keyframes loaderBar{from{transform:scaleX(0)}to{transform:scaleX(1)}}
@keyframes loaderOut{to{clip-path:inset(0 0 100% 0);visibility:hidden}}

/* Chapter rail */
.rail{position:fixed;left:22px;top:50%;transform:translateY(-50%);z-index:40;display:grid;gap:14px;font:500 .66rem/1 var(--font-mono,monospace);letter-spacing:.12em}
.rail a{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--muted);transition:color .3s}
.rail a::before{content:"";width:14px;height:1px;background:currentColor;transition:width .4s cubic-bezier(.2,.7,.2,1)}
.rail a span{opacity:0;transform:translateX(-6px);transition:.4s}
.rail a.on{color:var(--accent)}
.rail a.on::before{width:34px}
.rail a:hover span,.rail a:focus-visible span{opacity:1;transform:none;background:color-mix(in srgb,var(--bg) 85%,transparent);padding:4px 8px;border-radius:6px}
@media (max-width:900px){.rail{display:none}}
img,svg,canvas{display:block;max-width:100%}
a{color:inherit}
::selection{background:var(--accent);color:var(--bg)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

/* Grain overlay */
.grain{position:fixed;inset:-50%;pointer-events:none;z-index:90;opacity:.06;
  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='.9' numOctaves='3' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  animation:grain 1s steps(6) infinite}
@keyframes grain{0%{transform:translate(0,0)}20%{transform:translate(-3%,2%)}40%{transform:translate(2%,-3%)}60%{transform:translate(-2%,-1%)}80%{transform:translate(3%,3%)}100%{transform:translate(0,0)}}

/* Cursor */
.has-cursor,.has-cursor *{cursor:none!important}
.cx-dot,.cx-ring{position:fixed;left:0;top:0;pointer-events:none;z-index:100;border-radius:50%;transition:opacity .3s}
html:not(.cx-moved) .cx-dot,html:not(.cx-moved) .cx-ring{opacity:0!important}
.cx-dot{width:6px;height:6px;margin:-3px 0 0 -3px;background:var(--accent);mix-blend-mode:difference}
.cx-ring{width:38px;height:38px;margin:-19px 0 0 -19px;border:1px solid var(--accent);opacity:.6;transition:width .3s,height .3s,margin .3s,background .3s,opacity .3s,transform .08s linear}
.cx-ring.is-hot{width:70px;height:70px;margin:-35px 0 0 -35px;background:color-mix(in srgb,var(--accent) 14%,transparent);opacity:1}

/* Nav glass once the page is scrolled */
.nav{transition:background .5s,backdrop-filter .5s,box-shadow .5s}
.scrolled .nav{background:color-mix(in srgb,var(--bg) 72%,transparent)!important;backdrop-filter:blur(16px) saturate(1.3);-webkit-backdrop-filter:blur(16px) saturate(1.3);box-shadow:0 1px 0 var(--line)}

/* Scroll progress */
.cx-progress{position:fixed;left:0;top:0;height:2px;width:100%;z-index:95;transform-origin:0 50%;transform:scaleX(0);
  background:linear-gradient(90deg,var(--accent),var(--accent2))}

/* Reveal */
.js .reveal{opacity:0;transform:translateY(40px);filter:blur(8px);transition:opacity 1s cubic-bezier(.2,.7,.2,1),transform 1.1s cubic-bezier(.2,.7,.2,1),filter 1s}
.js .reveal.in{opacity:1;transform:none;filter:none}
.reveal[data-d="1"]{transition-delay:.1s}.reveal[data-d="2"]{transition-delay:.2s}.reveal[data-d="3"]{transition-delay:.3s}.reveal[data-d="4"]{transition-delay:.4s}

/* Split text */
.sw{display:inline-block;white-space:nowrap}
.sc{display:inline-block}
.js [data-split] .sc{opacity:0;transform:translateY(.7em) rotateX(-80deg);transform-origin:50% 100%;filter:blur(6px);
  transition:opacity .8s,transform 1s cubic-bezier(.2,.8,.2,1),filter .8s;transition-delay:calc(var(--i)*22ms)}
.js [data-split].in .sc{opacity:1;transform:none;filter:none}

/* Tilt spotlight */
[data-tilt]{transform-style:preserve-3d;transition:transform .5s cubic-bezier(.2,.7,.2,1);will-change:transform}
[data-tilt]:hover{transition:transform .08s linear}
[data-tilt]::after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;opacity:0;transition:opacity .4s;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),color-mix(in srgb,var(--accent) 22%,transparent),transparent 45%)}
[data-tilt]:hover::after{opacity:1}

[data-magnetic]{transition:transform .35s cubic-bezier(.2,.7,.2,1)}

/* Marquee */
.marquee{display:flex;overflow:hidden;user-select:none;-webkit-mask:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent);mask:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent)}
.marquee__track{display:flex;flex-shrink:0;gap:3rem;padding-right:3rem;animation:marquee var(--speed,40s) linear infinite}
.marquee:hover .marquee__track{animation-play-state:paused}
@keyframes marquee{to{transform:translateX(-100%)}}

/* Offer box (shared structure, page styles colors) */
.offer{position:relative;max-width:560px;margin:0 auto;padding:28px;border-radius:22px;border:1px solid var(--line);
  background:color-mix(in srgb,var(--bg) 70%,transparent);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);overflow:hidden}
.offer::before{content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;pointer-events:none;
  background:conic-gradient(from var(--ang,0deg),transparent 0 70%,var(--accent) 80%,var(--accent2) 90%,transparent);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;animation:spinb 6s linear infinite}
@property --ang{syntax:"<angle>";inherits:false;initial-value:0deg}
@keyframes spinb{to{--ang:360deg}}
.offer__tag{display:inline-flex;align-items:center;gap:8px;font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent)}
.offer__tag i{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent);animation:pulse 1.6s infinite}
@keyframes pulse{50%{opacity:.25}}
.offer h3{margin:.5rem 0 .3rem;font-size:1.35rem;line-height:1.25}
.offer p{margin:0 0 1rem;color:var(--muted);font-size:.92rem}
.offer form{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.offer input,.offer textarea{width:100%;font:inherit;font-size:.9rem;color:var(--fg);background:color-mix(in srgb,var(--fg) 5%,transparent);
  border:1px solid var(--line);border-radius:12px;padding:11px 13px;transition:border-color .3s,background .3s}
.offer input:focus,.offer textarea:focus{outline:none;border-color:var(--accent);background:color-mix(in srgb,var(--accent) 7%,transparent)}
.offer textarea{grid-column:1/-1;min-height:70px;resize:vertical}
.offer button{grid-column:1/-1;font:inherit;font-weight:600;letter-spacing:.02em;border:0;border-radius:12px;padding:13px;color:var(--bg);
  background:linear-gradient(100deg,var(--accent),var(--accent2));cursor:pointer;transition:filter .3s,box-shadow .3s}
.offer button:hover{filter:brightness(1.12);box-shadow:0 10px 40px -10px var(--accent)}
.offer__foot{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:12px;font-size:.78rem;color:var(--muted)}
.offer__foot a{color:var(--accent);text-decoration:none}
.offer [data-offer-status]{grid-column:1/-1;font-size:.8rem;margin:0}
.offer [data-offer-status]:empty{display:none}
[data-offer-status][data-state=err]{color:#ff6b6b}
[data-offer-status][data-state=ok]{color:var(--accent)}
@media (max-width:520px){.offer form{grid-template-columns:1fr}}

/* Small screens: keep nav on one line, let chapter kickers wrap cleanly */
.nav__cta{white-space:nowrap}
@media (max-width:480px){
  .xs-hide{display:none}
  html .nav__cta{padding:10px 14px;font-size:.74rem}
  html .logo{font-size:.92rem}
}
@media (max-width:600px){html .kicker{flex-wrap:wrap;row-gap:8px;line-height:1.5;letter-spacing:.2em}}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001s!important;animation-iteration-count:1!important;transition-duration:.001s!important}
  .grain{display:none}
}