/* =========================================================
   SITI — landing · 3. cromo: grano, cursor, progreso, preloader, nav, drawer
   ========================================================= */
.grain{
  position:fixed;inset:-150%;z-index:900;pointer-events:none;opacity:var(--grain);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)'/%3E%3C/svg%3E");
  animation:grain 6s steps(6) infinite;
}
@keyframes grain{
  0%,100%{transform:translate(0,0)}  20%{transform:translate(-4%,3%)}
  40%{transform:translate(3%,-4%)}   60%{transform:translate(-3%,-2%)}
  80%{transform:translate(4%,2%)}
}

/* ---------- cursor propio (solo puntero fino) ---------- */
.cursor{position:fixed;top:0;left:0;z-index:950;pointer-events:none;mix-blend-mode:difference;opacity:0;transition:opacity .3s}
.cursor.is-ready{opacity:1}
.cursor__dot{position:absolute;width:7px;height:7px;border-radius:99px;background:#fff;transform:translate(-50%,-50%)}
.cursor__ring{
  position:absolute;width:40px;height:40px;border:1px solid rgba(255,255,255,.55);
  border-radius:99px;transform:translate(-50%,-50%);display:grid;place-items:center;
  transition:width .38s var(--ease),height .38s var(--ease),background-color .38s,border-color .38s;
}
.cursor__label{
  font-family:var(--f-mono);font-size:.62rem;letter-spacing:.08em;color:#000;
  opacity:0;transform:scale(.6);transition:opacity .28s,transform .28s var(--ease);white-space:nowrap;
}
.cursor.is-active .cursor__ring{width:78px;height:78px;background:#fff;border-color:#fff}
.cursor.is-active .cursor__label{opacity:1;transform:scale(1)}
.cursor.is-active .cursor__dot{opacity:0}
@media (hover:none),(pointer:coarse){.cursor{display:none}}

/* ---------- barra de progreso ---------- */
.scrollbar{position:fixed;top:0;left:0;right:0;height:2px;z-index:940;pointer-events:none}
.scrollbar i{
  display:block;height:100%;width:0%;
  background:linear-gradient(90deg,var(--orange),var(--amber));
  box-shadow:0 0 14px rgba(var(--hot),.6);
}

/* ---------- preloader ---------- */
.loader{position:fixed;inset:0;z-index:1000;background:var(--bg);display:grid;place-items:center}
.loader__inner{position:relative;z-index:2;width:min(380px,76vw);text-align:center}
.loader__logo{width:84px;height:auto;margin:0 auto 34px;animation:bob 2.2s var(--ease) infinite}
@keyframes bob{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-10px) rotate(-3deg)}}
.loader__meta{
  display:flex;justify-content:space-between;align-items:baseline;
  font-family:var(--f-mono);font-size:.68rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted);margin-bottom:14px;
}
.loader__count{color:var(--fg);font-size:1rem}
.loader__bar{height:1px;background:var(--line-2);overflow:hidden}
.loader__bar i{display:block;height:100%;width:0%;background:var(--orange)}
.loader__panels{position:absolute;inset:0;display:flex;pointer-events:none}
.loader__panels span{flex:1;background:var(--bg)}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:800;padding:16px var(--pad);
  transition:transform .55s var(--ease),background-color .5s,padding .5s,border-color .5s;
  border-bottom:1px solid transparent;
}
.nav.is-stuck{
  padding-block:10px;
  background:color-mix(in srgb,var(--bg) 74%,transparent);
  backdrop-filter:blur(18px) saturate(1.4);-webkit-backdrop-filter:blur(18px) saturate(1.4);
  border-bottom-color:var(--line);
}
.nav.is-hidden{transform:translateY(-110%)}
.nav__in{max-width:var(--shell);margin-inline:auto;display:flex;align-items:center;justify-content:space-between;gap:20px}

.logo{display:block;line-height:0;transition:transform .5s var(--ease)}
.logo img{width:auto;height:52px;transition:height .5s var(--ease),transform .5s var(--ease)}
.nav.is-stuck .logo img{height:42px}
.logo:hover img{transform:scale(1.05) rotate(-2deg)}

/* links: doble texto con barrido vertical */
.nav__links{display:flex;gap:2px}
.nav__links a{
  position:relative;display:block;overflow:hidden;
  clip-path:inset(9px 0 9px 0);
  height:calc(1.45em + 18px);padding:9px 13px;
  font-family:var(--f-dis);font-size:.92rem;font-weight:600;line-height:1.45;color:var(--muted);
  transition:color .4s;
}
.nav__links a span{display:block;line-height:1.45;transition:transform .5s var(--ease);white-space:nowrap}
.nav__links a span:last-child{color:var(--ink)}
.nav__links a:hover{color:var(--fg)}
.nav__links a:hover span{transform:translateY(-100%)}
.nav__links a.is-active{color:var(--ink)}
.drawer__links a.is-active{color:var(--ink)}

.nav__right{display:flex;align-items:center;gap:10px}

.burger{display:none;width:44px;height:44px;border:1px solid var(--line-2);border-radius:12px;padding:13px 11px}
.burger i{display:block;height:1.5px;background:var(--fg);transition:transform .45s var(--ease)}
.burger i:first-child{margin-bottom:5px}
.burger.is-open i:first-child{transform:translateY(3.2px) rotate(45deg)}
.burger.is-open i:last-child{transform:translateY(-3.2px) rotate(-45deg)}

/* ---------- drawer móvil ---------- */
.drawer{
  position:fixed;inset:0;z-index:790;background:var(--bg-2);
  padding:110px var(--pad) 40px;overflow-y:auto;
  display:flex;flex-direction:column;justify-content:space-between;gap:32px;
  clip-path:inset(0 0 100% 0);transition:clip-path .7s var(--ease),visibility 0s .7s;
  visibility:hidden;
}
.drawer.is-open{clip-path:inset(0 0 0 0);visibility:visible;transition:clip-path .7s var(--ease)}
.drawer__links{display:flex;flex-direction:column}
.drawer__links a{
  display:flex;align-items:baseline;gap:16px;padding:14px 0;
  font-family:var(--f-dis);font-size:clamp(1.8rem,8vw,2.8rem);font-weight:800;letter-spacing:-.04em;
  border-bottom:1px solid var(--line);color:var(--fg);
  opacity:0;transform:translateY(24px);transition:opacity .5s var(--ease),transform .5s var(--ease),color .3s;
}
.drawer__links a:hover{color:var(--ink)}
.drawer.is-open .drawer__links a{opacity:1;transform:none}
.drawer.is-open .drawer__links a:nth-child(1){transition-delay:.14s}
.drawer.is-open .drawer__links a:nth-child(2){transition-delay:.19s}
.drawer.is-open .drawer__links a:nth-child(3){transition-delay:.24s}
.drawer.is-open .drawer__links a:nth-child(4){transition-delay:.29s}
.drawer.is-open .drawer__links a:nth-child(5){transition-delay:.34s}
.drawer.is-open .drawer__links a:nth-child(6){transition-delay:.39s}
.drawer__links em{font-family:var(--f-mono);font-size:.7rem;font-style:normal;color:var(--ink)}

@media (max-width:1080px){
  .nav__links,.nav__login{display:none}
  .burger{display:block}
}
@media (max-width:560px){
  .nav{padding-inline:16px}
  .logo img{height:42px}
  .nav.is-stuck .logo img{height:36px}
  .nav__right{gap:8px}
  .nav__right .btn--sm{padding:10px 16px}
}