/* USONOI · base */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--body);font-weight:350;font-size:1rem;line-height:1.6;
  overflow-x:hidden;-webkit-font-smoothing:antialiased;
}
img,svg,canvas,video{max-width:100%;display:block}
img{height:auto}
a{color:inherit}
p{margin:0}
h1,h2,h3,h4{margin:0;font-weight:500;text-wrap:balance}
ul,ol{margin:0;padding:0}
button,input,select,textarea{font:inherit;color:inherit}
::selection{background:#fff;color:#000}
:focus-visible{outline:1px solid #fff;outline-offset:3px}
[id]{scroll-margin-top:calc(var(--nav-h) + 20px)}
[hidden]{display:none!important}

.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:#fff;color:#000;padding:.6em 1em;font-family:var(--mono);font-size:.75rem;text-decoration:none}
.skip:focus{top:12px}

.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}

/* tipografía */
.eyebrow{
  display:flex;align-items:center;gap:.7rem;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.32em;text-transform:uppercase;color:var(--mut);
}
.eyebrow .dot{width:9px;height:9px}
.h-display{font-family:var(--display);font-weight:700;text-transform:uppercase;line-height:.98;letter-spacing:-.01em}
.h-section{font-family:var(--display);font-weight:500;text-transform:uppercase;font-size:clamp(1.7rem,4.4vw,3.4rem);line-height:1.06;letter-spacing:-.005em}
.h-card{font-family:var(--display);font-weight:500;text-transform:uppercase;font-size:clamp(1.1rem,2vw,1.45rem);line-height:1.2}
.lead{font-size:clamp(1.02rem,1.5vw,1.2rem);color:var(--ink-2);max-width:40rem}
.muted{color:var(--mut)}
.mono{font-family:var(--mono)}

/* secciones */
main{position:relative;z-index:2}
.section{position:relative;padding-block:clamp(5rem,11vw,9rem);border-top:1px solid var(--line)}
.section-head{max-width:48rem;margin-bottom:clamp(2.4rem,5vw,4rem);display:grid;gap:1.1rem}
.section-head p{color:var(--mut);max-width:40rem}
.section::before{
  content:"";position:absolute;top:-1px;left:-30%;width:26%;height:1px;
  background:linear-gradient(90deg,transparent,var(--world),transparent);opacity:0;pointer-events:none;
}
.js .section.lit::before{animation:sweep 1.4s ease-out .1s forwards}
@keyframes sweep{0%{left:-30%;opacity:1}100%{left:110%;opacity:0}}

/* animación de entrada: solo con JS; sin JS todo es visible */
.js .reveal{opacity:0;transform:translateY(22px)}
.js .reveal.in{opacity:1;transform:none;transition:opacity .9s ease,transform .9s var(--ease)}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .js .reveal{opacity:1;transform:none}
}