/* ============================================================
   KARSAN DIGITAL — sistema de diseño compartido del sitio
   Fondo blanco siempre. Azul / amarillo / gris solo en detalles.
   Tipografía: Montserrat.
   ============================================================ */

:root{
  --bg:#ffffff;
  --panel-tint:#f6f7f8;
  --ink:#000000;
  --ink-dim:#5b5f66;
  --blue:#004aad;
  --blue-dark:#003a87;
  --yellow:#f4dc00;
  --gray:#a5a5a5;
  --border:rgba(0,0,0,.12);
  --border-soft:rgba(0,0,0,.08);
  --shadow:0 24px 48px -30px rgba(0,20,60,.22);
  --shadow-lg:0 32px 64px -28px rgba(0,20,60,.28);
  --radius:20px;
  --radius-sm:12px;
  --maxw:1240px;
  color-scheme:light;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Montserrat",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;}
section{padding:96px 0;}
@media (max-width:900px){
  section{padding:64px 0;}
  .wrap{padding:0 20px;}
}

h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-weight:700;font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--blue);margin-bottom:16px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--yellow);display:inline-block;}
.section-title{font-size:clamp(1.9rem,3.4vw,2.7rem);line-height:1.08;color:var(--ink);}
.section-title em{font-style:italic;color:var(--blue);font-weight:800;}
.section-lead{color:var(--ink-dim);font-size:1.05rem;max-width:62ch;margin-top:16px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-family:"Montserrat",sans-serif;font-weight:700;font-size:.92rem;
  padding:15px 28px;border-radius:100px;border:2px solid transparent;
  cursor:pointer;text-decoration:none;transition:transform .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--blue);color:#fff;}
.btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px);}
.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{transform:translateY(-2px);}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-outline:hover{background:var(--ink);color:#fff;}
.btn-yellow-tag{
  display:inline-flex;align-items:center;gap:6px;background:var(--yellow);color:var(--ink);
  font-weight:800;font-size:.72rem;letter-spacing:.04em;text-transform:uppercase;
  padding:6px 14px;border-radius:100px;
}

/* ============================================================
   NAV
   ============================================================ */
.site-nav{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.98);
  border-bottom:1px solid var(--border-soft);
}
.nav-row{
  max-width:var(--maxw);margin:0 auto;padding:16px 28px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.nav-logo{
  display:flex;align-items:baseline;gap:6px;
  font-weight:900;font-size:1.15rem;letter-spacing:-.01em;text-decoration:none;color:var(--ink);
}
.nav-logo .dot{color:var(--blue);}
.nav-links{display:flex;align-items:center;gap:20px;list-style:none;margin:0;padding:0;}
.nav-links a{
  font-size:.82rem;font-weight:600;text-decoration:none;color:var(--ink-dim);
  transition:color .15s ease;position:relative;padding:4px 0;white-space:nowrap;
}
.nav-cta-mobile{display:none;}
.nav-links a:hover,.nav-links a.is-active{color:var(--ink);}
.nav-links a.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:2px;background:var(--blue);
}
.nav-cta{flex-shrink:0;padding:11px 20px;font-size:.84rem;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1.5px solid var(--border);
  background:#fff;cursor:pointer;flex-shrink:0;align-items:center;justify-content:center;
  flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);transition:transform .2s ease,opacity .2s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

@media (max-width:1100px){
  .nav-links{
    position:fixed;top:65px;left:0;right:0;bottom:0;
    background:#fff;flex-direction:column;align-items:flex-start;
    padding:28px;gap:6px;
    transform:translateX(100%);transition:transform .3s ease;
    overflow-y:auto;
  }
  .nav-links.is-open{transform:translateX(0);}
  .nav-links a{width:100%;padding:14px 4px;font-size:1.05rem;border-bottom:1px solid var(--border-soft);}
  .nav-links a.is-active::after{display:none;}
  .nav-links a.is-active{color:var(--blue);}
  .nav-cta{display:none;}
  .nav-links a.nav-cta-mobile{display:inline-flex;margin-top:16px;color:#fff;border-bottom:none;width:auto;padding:15px 28px;}
  .nav-toggle{display:inline-flex;}
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{background:var(--ink);color:#fff;padding:72px 0 28px;}
.footer-grid{
  display:grid;grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:48px;
  padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.14);
}
@media (max-width:900px){.footer-grid{grid-template-columns:1fr 1fr;row-gap:36px;}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr;}}
.footer-brand{font-weight:900;font-size:1.3rem;margin-bottom:12px;}
.footer-brand .dot{color:var(--yellow);}
.footer-tagline{color:rgba(255,255,255,.62);font-size:.9rem;max-width:32ch;}
.footer-col h4{
  font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:rgba(255,255,255,.5);
  margin-bottom:16px;font-weight:700;
}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px;}
.footer-col a{color:rgba(255,255,255,.85);text-decoration:none;font-size:.9rem;}
.footer-col a:hover{color:var(--yellow);}
.footer-col .footer-subhead{
  font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:rgba(255,255,255,.5);
  font-weight:700;margin-top:6px;
}
.footer-social{display:flex;gap:10px;margin-top:16px;}
.footer-social a{
  width:36px;height:36px;border-radius:50%;border:1px solid rgba(255,255,255,.25);
  display:flex;align-items:center;justify-content:center;font-size:.85rem;
}
.footer-social a:hover{background:var(--yellow);color:var(--ink);border-color:var(--yellow);}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  padding-top:24px;font-size:.78rem;color:rgba(255,255,255,.45);
}
.footer-map{
  border-radius:14px;overflow:hidden;border:1px solid rgba(255,255,255,.14);
  height:170px;margin-top:14px;position:relative;
}
.footer-map iframe{width:100%;height:100%;border:0;filter:grayscale(.3) contrast(1.05);}
.footer-map-note{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:rgba(0,0,0,.55);color:#fff;font-size:.72rem;text-align:center;padding:12px;
}

/* ============================================================
   Shared components reused across pages
   ============================================================ */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--border-soft);border:1px solid var(--border-soft);border-radius:var(--radius);overflow:hidden;}
@media (max-width:760px){.stat-grid{grid-template-columns:repeat(2,1fr);}}
.stat-item{background:#fff;padding:32px 24px;text-align:center;}
.stat-num{font-size:clamp(1.7rem,3vw,2.5rem);font-weight:900;color:var(--blue);line-height:1;}
.stat-label{margin-top:10px;color:var(--ink-dim);font-size:.84rem;line-height:1.35;}

.pill-tag{
  display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:100px;
  background:var(--panel-tint);border:1px solid var(--border-soft);
  font-size:.76rem;font-weight:700;color:var(--ink-dim);
}

.card{
  background:#fff;border:1px solid var(--border-soft);border-radius:var(--radius);
  box-shadow:var(--shadow);
}

.skip-link{
  position:absolute;left:-999px;top:auto;
  background:var(--blue);color:#fff;padding:12px 20px;border-radius:8px;z-index:200;
}
.skip-link:focus{left:16px;top:16px;}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;}
}

/* ============================================================
   Librería de efectos compartida (karsan-efectos-visuales.html)
   ============================================================ */

/* ---- tarjetas cromáticas ---- */
.chroma-grid{display:grid;gap:14px;}
.chroma-card{
  position:relative;border-radius:14px;border:1px solid var(--border-soft);
  background:#fff;padding:20px 20px;overflow:hidden;isolation:isolate;
  transition:filter .35s ease,opacity .35s ease,transform .35s ease,border-color .35s ease;
  --mx:50%;--my:50%;--tint:0,74,173;
}
.chroma-card::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:radial-gradient(220px circle at var(--mx) var(--my),rgba(var(--tint),.16),transparent 68%);
  opacity:0;transition:opacity .35s ease;
}
.chroma-card::after{
  content:"";position:absolute;inset:0;z-index:-1;border-radius:inherit;padding:1px;
  background:radial-gradient(160px circle at var(--mx) var(--my),rgba(var(--tint),.85),transparent 70%);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  opacity:0;transition:opacity .35s ease;
}
.chroma-card:hover{transform:translateY(-3px);border-color:rgba(var(--tint),.4);}
.chroma-card:hover::before,.chroma-card:hover::after{opacity:1;}
.chroma-grid.grid-hover .chroma-card:not(:hover){filter:grayscale(55%);opacity:.6;}

/* ---- elemento magnético ---- */
.magnetic{will-change:transform;transition:transform .5s cubic-bezier(.2,.8,.2,1);}

/* ---- tarjetas apiladas al hacer scroll ---- */
.stack-group{position:relative;}
.stack-card{
  position:sticky;background:#fff;
}
@media (max-width:640px){
  .stack-card{position:static !important;}
}

/* ---- video hero ---- */
video{max-width:100%;}

/* ============================================================
   Carrusel grande de imágenes — .big-carousel
   ============================================================ */
.big-carousel{position:relative;border-radius:var(--radius);overflow:hidden;background:#0b0d10;isolation:isolate;box-shadow:var(--shadow-lg);}
.bc-track{display:flex;touch-action:pan-y;transition:transform .65s cubic-bezier(.16,.84,.24,1);}
.bc-slide{position:relative;flex:0 0 100%;aspect-ratio:16/10;background:var(--panel-tint);overflow:hidden;}
.bc-slide img{width:100%;height:100%;object-fit:cover;display:block;transform:scale(1.05);transition:transform 1.2s cubic-bezier(.16,.84,.24,1);}
.bc-slide.is-active img{transform:scale(1);}
.big-carousel::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.55) 0%,transparent 42%);pointer-events:none;z-index:1;}
.bc-cap{position:absolute;left:26px;bottom:24px;z-index:2;color:#fff;font-weight:800;font-size:1.1rem;text-shadow:0 2px 14px rgba(0,0,0,.5);opacity:0;transform:translateY(12px);transition:opacity .5s ease .18s,transform .5s ease .18s;}
.bc-slide.is-active .bc-cap{opacity:1;transform:translateY(0);}
.bc-arrow{position:absolute;top:50%;transform:translateY(-50%);width:52px;height:52px;border-radius:50%;border:1px solid rgba(255,255,255,.3);background:rgba(10,12,16,.4);backdrop-filter:blur(6px);color:#fff;font-size:1.6rem;line-height:1;display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:3;transition:background .2s ease,transform .2s ease;}
.bc-arrow:hover{background:var(--blue);transform:translateY(-50%) scale(1.08);}
.bc-prev{left:18px;}
.bc-next{right:18px;}
.bc-count{position:absolute;top:20px;right:22px;z-index:3;color:#fff;font-size:.76rem;font-weight:800;letter-spacing:.04em;background:rgba(0,0,0,.4);padding:6px 14px;border-radius:100px;font-variant-numeric:tabular-nums;}
.bc-dots{position:absolute;left:0;right:0;bottom:16px;display:flex;justify-content:center;gap:7px;z-index:3;pointer-events:none;}
.bc-dots button{width:8px;height:8px;border-radius:50%;border:none;background:rgba(255,255,255,.4);cursor:pointer;padding:0;pointer-events:auto;transition:background .2s ease,transform .2s ease;}
.bc-dots button.is-active{background:#fff;transform:scale(1.35);}
@media (max-width:720px){
  .bc-arrow{width:40px;height:40px;font-size:1.25rem;}
  .bc-slide{aspect-ratio:4/5;}
  .bc-cap{font-size:.92rem;left:18px;bottom:18px;}
}
@media (prefers-reduced-motion:reduce){
  .bc-track{transition:none;}
  .bc-slide img{transition:none;transform:none;}
}

/* ---- revelado de títulos [data-scramble] ---- */
[data-scramble]{
  opacity:0;transform:translateY(22px);filter:blur(6px);
  transition:opacity .85s cubic-bezier(.2,.7,.2,1),transform .85s cubic-bezier(.2,.7,.2,1),filter .85s cubic-bezier(.2,.7,.2,1);
  will-change:opacity,transform,filter;
}
[data-scramble].is-revealed{opacity:1;transform:translateY(0);filter:blur(0);}
@media (prefers-reduced-motion:reduce){
  [data-scramble]{opacity:1;transform:none;filter:none;transition:none;}
}