/* CitedBy · sistema visual compartido (2026-11-10). Requiere brand.css antes.
   Cálido y cercano: blanco + bandas mist, violeta como acento, amarillo solo en lo que cita la IA,
   formas redondeadas, sombras suaves, firma manuscrita (Caveat) solo para la firma del fundador. */
@import url('https://fonts.googleapis.com/css2?family=Caveat:wght@600;700&display=swap');

:root{
  --ink:#202329;
  --ink-2:#4B5160;
  --ink-3:#5A6170;
  --line:#E6E8EE;
  --line-2:#D9DCE4;
  --bg-2:#F7F8FA;
  --violet-ink:#4527E0;
  --r:22px;
  --hand:'Caveat',cursive;
  --shadow-sm:0 1px 2px rgba(32,35,41,.06),0 1px 1px rgba(32,35,41,.04);
  --shadow-md:0 1px 2px rgba(32,35,41,.05),0 8px 24px -6px rgba(32,35,41,.10);
  --shadow-lg:0 2px 4px rgba(32,35,41,.04),0 24px 48px -12px rgba(32,35,41,.18);
  --ease:cubic-bezier(.16,1,.3,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:#fff;color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
::selection{background:var(--violet-soft);color:var(--ink)}
a{color:var(--violet-ink);text-underline-offset:.2em;text-decoration-thickness:1px}
:focus-visible{outline:2px solid var(--violet);outline-offset:3px;border-radius:6px}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:1140px;margin:0 auto;padding:0 24px}
h1,h2,h3{margin:0;text-wrap:balance;letter-spacing:-.03em;font-weight:800}
h2{font-size:clamp(30px,3.6vw,44px);line-height:1.08}
.sub{font-size:clamp(17px,1.5vw,19px);color:var(--ink-2);max-width:60ch;margin:14px 0 0}
.s{padding:clamp(64px,9vw,112px) 0}
.s.alt,.mist{background:var(--bg-2)}
.center{text-align:center}.center .sub{margin-left:auto;margin-right:auto}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* Nav */
.nav{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.86);backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;justify-content:space-between;align-items:center;height:68px;gap:16px}
.nav .logo{font-size:23px;text-decoration:none}
.links{display:flex;align-items:center;gap:4px;font-size:15px;font-weight:600}
.links a{color:var(--ink-2);text-decoration:none;padding:8px 12px;border-radius:8px;transition:color .15s,background .15s}
.links a:hover{color:var(--ink);background:var(--bg-2)}
.links a[hidden]{display:none}
.links a.navkit{color:#fff;background:var(--ink);margin-left:8px}
.links a.navkit:hover{background:#000;color:#fff}
@media (max-width:680px){.links a:not(.navkit){display:none}}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:700 16px/1 var(--sans);text-decoration:none;padding:14px 20px;border-radius:12px;background:var(--violet);color:#fff;border:0;cursor:pointer;box-shadow:0 1px 2px rgba(32,35,41,.12),0 6px 16px -6px rgba(91,61,245,.55);transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .15s}
.btn:hover{background:var(--violet-ink);transform:translateY(-1px)}
.btn:active{transform:none}
.btn svg{width:17px;height:17px;flex:none}
.btn.ghost{background:#fff;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line-2),var(--shadow-sm)}
.btn.ghost:hover{background:var(--bg-2)}
.btn.dark{background:var(--ink);box-shadow:var(--shadow-sm)}
.btn.dark:hover{background:#000}

/* Cards */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--shadow-sm);transition:box-shadow .25s var(--ease),transform .25s var(--ease),border-color .2s}
.card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--line-2)}
.card .tag{font-size:13px;font-weight:600;color:var(--ink-3);margin-bottom:6px}
.card h3{font-size:20px;line-height:1.25;letter-spacing:-.02em;margin:0 0 8px}
.card p{margin:0;font-size:15.5px;color:var(--ink-2)}

/* Personal touches */
.hi{display:flex;gap:14px;align-items:center;max-width:46ch;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px 16px 12px 12px;box-shadow:var(--shadow-sm)}
.hi p{margin:0;font-size:15px;color:var(--ink-2);line-height:1.45}
.hi b{color:var(--ink)}
.av{flex:none;width:46px;height:46px;border-radius:50%;background:var(--violet);color:#fff;display:grid;place-items:center;font-weight:800;font-size:16px;box-shadow:0 0 0 4px var(--violet-soft)}
.letter{background:var(--violet-soft);border:1px solid #DDD5FF;border-radius:28px;padding:clamp(26px,4vw,44px)}
.letter p{color:#3A3550;margin:0 0 16px;max-width:62ch}
.sign{font-family:var(--hand);font-size:46px;line-height:1;color:var(--violet-ink)!important;margin:18px 0 6px!important;transform:rotate(-3deg);transform-origin:left}
.small-note{font-size:14px}
.band{background:var(--violet);color:#fff;position:relative;overflow:hidden}
.band::before{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.07)}
.band .wrap{position:relative}
.band h2{color:#fff}.band p{color:#E9E5FF}
.final{background:var(--violet);color:#fff;border-radius:32px;padding:clamp(36px,6vw,64px);position:relative;overflow:hidden}
.final::after{content:"";position:absolute;right:-90px;bottom:-110px;width:320px;height:320px;border-radius:50%;background:rgba(255,255,255,.08)}
.final>*{position:relative}
.final h2{color:#fff}.final p{color:#E9E5FF}
.final .btn{background:#fff;color:var(--ink);box-shadow:none}
.final .btn:hover{background:var(--violet-soft)}

/* Forms */
.field{flex:1 1 220px;min-width:0;font:inherit;font-size:16px;padding:13px 14px;border-radius:12px;border:1px solid var(--line-2);background:#fff;color:var(--ink);caret-color:var(--violet);box-shadow:var(--shadow-sm);transition:border-color .15s,box-shadow .15s}
.field::placeholder{color:#6B7180}
.field:focus{outline:none;border-color:var(--violet);box-shadow:0 0 0 4px rgba(91,61,245,.15)}
input[type=checkbox]{accent-color:var(--violet)}

/* FAQ */
.faq details{border-bottom:1px solid var(--line);padding:20px 4px}
.faq details:first-of-type{border-top:1px solid var(--line)}
.faq summary{font-weight:700;font-size:17.5px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:24px;line-height:1;color:var(--ink-3);transition:transform .3s var(--ease),color .2s}
.faq details[open] summary::after{transform:rotate(45deg);color:var(--violet)}
.faq details p{margin:10px 0 0;color:var(--ink-2);max-width:68ch}

/* Footer */
.site-footer{padding:36px 0 48px;font-size:14px;color:var(--ink-3);border-top:1px solid var(--line)}
.site-footer .wrap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:center}
.site-footer .logo{font-size:19px;text-decoration:none}
.site-footer a{color:var(--ink-2)}