/* Motor de 3D e movimento dos sites do portfólio (usado com motion.js). Tudo desliga com movimento reduzido. */
/* anel 3D: os itens formam um cilindro que gira sozinho e com a rolagem */
.ring-stage{perspective:1100px;height:var(--ring-h,420px);display:grid;place-items:center;position:relative}
.ring{position:relative;width:var(--ring-w,200px);height:var(--ring-ih,120px);transform-style:preserve-3d;transform:rotateX(-12deg) rotateY(var(--ry,0deg))}
.ring>*{position:absolute;inset:0;display:grid;place-items:center;text-align:center;backface-visibility:hidden}
/* entrada em 3D: a seção "levanta" ao chegar na tela (o texto nunca fica invisível) */
.js [data-reveal]{transform:perspective(1200px) rotateX(18deg) translateY(48px);opacity:.25;transition:transform .9s cubic-bezier(.2,.7,.2,1),opacity .6s ease;transform-origin:50% 100%}
.js [data-reveal].in{transform:none;opacity:1}
/* cards que inclinam com o mouse */
[data-tilt]{transform:perspective(900px) rotateX(var(--tx,0deg)) rotateY(var(--ty,0deg)) translateZ(0);transition:transform .2s ease-out;will-change:transform}
/* bolhas flutuantes em profundidade */
.orbs{position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:0}
.orbs i{position:absolute;border-radius:50%;filter:blur(40px);opacity:.55;animation:orb 14s ease-in-out infinite alternate}
.orbs i:nth-child(2){animation-duration:18s;animation-delay:-6s}
.orbs i:nth-child(3){animation-duration:22s;animation-delay:-11s}
@keyframes orb{to{translate:40px -60px;scale:1.15}}
@media (prefers-reduced-motion:reduce){.js [data-reveal]{transform:none;opacity:1}[data-tilt]{transform:none}.orbs i{animation:none}}

/* ---------- v2: textura, giroscópio 3D, capítulos fixos, faixa corrida, cards empilhados ---------- */
/* textura granulada por cima de uma seção (classe .grain) */
.grain{position:relative;isolation:isolate}
.grain::after{content:'';position:absolute;inset:0;z-index:-1;pointer-events:none;opacity:.18;mix-blend-mode:overlay;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E")}
/* giroscópio: anéis 3D em volta de um núcleo; gira com a rolagem (--sy) e com o mouse (--mx/--my) */
.gyro{--size:min(70vw,420px);position:relative;width:var(--size);aspect-ratio:1;perspective:1000px;margin-inline:auto}
.gyro-in{position:absolute;inset:0;transform-style:preserve-3d;transform:rotateX(calc(var(--my,0) * 20deg + 10deg)) rotateY(calc(var(--mx,0) * 25deg))}
.gyro-ring{position:absolute;inset:var(--inset,0%);border-radius:50%;border:2px solid var(--gyro-c,rgba(255,255,255,.55));box-shadow:0 0 30px rgba(255,255,255,.15),inset 0 0 30px rgba(255,255,255,.08);transform-style:preserve-3d}
.gyro-ring:nth-child(1){--inset:0%;transform:rotateX(calc(var(--sy,0) * .12deg + 70deg)) rotateY(calc(var(--t,0) * 1deg))}
.gyro-ring:nth-child(2){--inset:9%;transform:rotateY(calc(var(--sy,0) * -.15deg + 60deg)) rotateX(calc(var(--t,0) * -1.3deg))}
.gyro-ring:nth-child(3){--inset:18%;transform:rotateX(calc(var(--sy,0) * .2deg)) rotateZ(calc(var(--t,0) * .8deg)) rotateY(45deg)}
.gyro-ring::before{content:'';position:absolute;top:-7px;left:50%;width:12px;height:12px;margin-left:-6px;border-radius:50%;background:var(--gyro-dot,#fff);box-shadow:0 0 16px var(--gyro-dot,#fff)}
.gyro-core{position:absolute;inset:32%;border-radius:50%;background:var(--gyro-core,radial-gradient(circle at 35% 30%,#fff,#9db6ea 40%,#2c4f8f 85%));box-shadow:0 0 90px 10px var(--gyro-glow,rgba(157,182,234,.6));animation:pulse 5s ease-in-out infinite alternate}
@keyframes pulse{to{scale:1.1}}
/* faixa de palavras correndo */
.marquee{overflow:hidden;white-space:nowrap;display:flex}
.marquee>div{display:flex;flex-shrink:0;gap:0;animation:marq var(--speed,30s) linear infinite}
.marquee span{padding:0 .6em}
@keyframes marq{to{transform:translateX(-100%)}}
/* capítulos fixos: a área [data-scrolly] tem N capítulos; o palco [data-stage] fica preso na tela */
[data-scrolly]{position:relative}
[data-stage]{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden;background:var(--stage-bg);transition:background-color .8s ease}
[data-stage] [data-word]{position:absolute;inset:50% 0 auto 0;translate:0 -50%;text-align:center;font-weight:900;line-height:.85;font-size:clamp(70px,19vw,300px);letter-spacing:-.04em;color:transparent;-webkit-text-stroke:2px var(--word-c,rgba(255,255,255,.16));white-space:nowrap;transition:opacity .5s ease}
[data-ch]{position:absolute;inset:0;z-index:1;display:grid;align-content:center;opacity:0;transform:translateY(40px);transition:opacity .6s ease,transform .8s cubic-bezier(.2,.7,.2,1);pointer-events:none}
[data-ch].on{opacity:1;transform:none;pointer-events:auto}
/* cards empilhados: cada um gruda um pouco abaixo do anterior */
.stack>*{position:sticky;top:calc(80px + var(--i,0) * 24px)}
@media (prefers-reduced-motion:reduce){.marquee>div{animation:none}[data-ch]{transition:none}.gyro-core{animation:none}}
/* movimento reduzido: capítulos viram blocos normais, um embaixo do outro */
[data-stage].static{position:relative;height:auto;overflow:visible}
[data-stage].static [data-ch]{position:relative;inset:auto;padding:64px 0}
[data-stage].static [data-word]{display:none}