/* Docs: DOC-BACKEND-001, DOC-USERDATA-001, ADR-0015 — mismo sistema visual que web/public/css/site.css */
:root{
  --brand:#633BD5; --brand-deep:#4A26B0; --brand-light:#7B52E8; --plum:#2A0F4D;
  --bg:#FFFFFF; --surface:#F6F3FF; --line:#E6DFF7;
  --text:#1D1233; --muted:#5E5475; --card:#FFFFFF; --header-bg:rgba(255,255,255,.82);
  --r-l:28px; --wrap:1180px;
  --font-d:"Outfit",ui-rounded,"SF Pro Rounded",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-b:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root{--bg:#130925;--surface:#1C1036;--line:#33235A;--text:#F3EEFF;--muted:#B9ADD6;--card:#1E1239;--header-bg:rgba(19,9,37,.8);color-scheme:dark}
}
*,*::before,*::after{box-sizing:border-box;scrollbar-width:none;-ms-overflow-style:none}
*::-webkit-scrollbar{display:none;width:0;height:0}
html{scroll-behavior:smooth;scroll-padding-top:96px;-webkit-text-size-adjust:100%;scrollbar-width:none;-ms-overflow-style:none}
html::-webkit-scrollbar{display:none;width:0;height:0}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-b);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden;scrollbar-width:none;-ms-overflow-style:none}
body::-webkit-scrollbar{display:none;width:0;height:0}
a{color:inherit}
h1,h2,h3{font-family:var(--font-d);letter-spacing:-.02em;text-wrap:balance}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
:focus-visible{outline:3px solid var(--brand-light);outline-offset:3px;border-radius:8px}

/* Cabecera */
.header{position:sticky;top:0;z-index:50;background:var(--header-bg);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid var(--line)}
.header .wrap{display:flex;align-items:center;gap:16px;height:72px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--font-d);font-weight:700;font-size:23px;letter-spacing:-.02em;color:var(--text)}
.brand img{width:38px;height:38px}
.header-end{margin-left:auto;display:flex;align-items:center;gap:10px}
.lang-toggle{display:inline-flex;background:var(--surface);border-radius:999px;padding:3px;font-size:13px;font-weight:600}
.lang-btn{border:0;background:transparent;font:inherit;padding:6px 10px;border-radius:999px;cursor:pointer;color:var(--muted)}
.lang-btn.active{background:var(--card);color:var(--text);box-shadow:0 1px 3px rgba(29,18,51,.15)}
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-d);font-weight:600;font-size:15px;border-radius:999px;padding:9px 18px;text-decoration:none;color:var(--text);box-shadow:inset 0 0 0 2px var(--line)}
.btn:hover{box-shadow:inset 0 0 0 2px var(--brand-light)}

/* Cabecera púrpura (page-hero de la web) */
.page-hero{position:relative;padding:64px 0 60px;overflow:hidden;color:#fff;isolation:isolate;
  background:radial-gradient(70% 90% at 78% 45%,#8A63F0 0%,rgba(138,99,240,0) 60%),linear-gradient(160deg,#4A26B0 0%,#633BD5 50%,#7B52E8 100%);
  border-radius:0 0 56px 56px}
.page-hero::after{content:"";position:absolute;inset:0;z-index:-1;opacity:.5;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.18) 1px,transparent 1.4px);background-size:22px 22px;
  -webkit-mask-image:linear-gradient(90deg,#000,transparent 55%);mask-image:linear-gradient(90deg,#000,transparent 55%)}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:14px;color:#D6C8FF;margin-bottom:18px}
.crumbs a{color:#fff;text-decoration:none;opacity:.85}
.crumbs a:hover{opacity:1;text-decoration:underline}
.page-hero h1{margin:0;font-size:clamp(1.9rem,3.6vw,3rem);font-weight:800;letter-spacing:-.035em;line-height:1.05;max-width:24ch}

/* Documento + índice */
main{padding:72px 0 0}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:64px;align-items:start}
.aside{order:2;position:sticky;top:96px;max-height:calc(100vh - 120px);overflow:auto;background:var(--surface);border-radius:var(--r-l);padding:24px}
.aside h3{font-size:16px;margin:0 0 10px}
.nav-links{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.nav-links a{display:block;padding:6px 10px;border-radius:10px;text-decoration:none;font-size:14.5px;color:var(--muted);line-height:1.4}
.nav-links a:hover{background:var(--card);color:var(--text)}
.content-card{order:1;max-width:72ch;line-height:1.7}
.lang-section{display:none}
.lang-section.active{display:block}
.doc-title{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
.last-update{display:inline-block;background:var(--surface);color:var(--muted);font-size:14px;font-weight:600;padding:6px 14px;border-radius:999px;margin:0 0 24px}
.content-card section{scroll-margin-top:96px}
.content-card h2{font-size:clamp(1.4rem,2.4vw,1.8rem);font-weight:700;line-height:1.15;margin:44px 0 12px}
.content-card h3{font-size:20px;line-height:1.25;margin:28px 0 8px}
.content-card p{margin:0 0 16px}
.content-card ul,.content-card ol{margin:0 0 16px;padding-left:1.3em}
.content-card li{margin:6px 0}
.content-card a{color:var(--brand);font-weight:600;overflow-wrap:anywhere}

/* Pie (footer de la web) */
.footer{padding:56px 0 40px;margin-top:96px;border-top:1px solid var(--line)}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(2,1fr);gap:40px}
.foot-grid h4{font-family:var(--font-d);font-size:16px;margin:0 0 14px;font-weight:600}
.foot-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.foot-grid ul a{text-decoration:none;color:var(--muted);font-size:15px}
.foot-grid ul a:hover{color:var(--text)}
.foot-brand p{color:var(--muted);font-size:15px;margin:14px 0 0;max-width:22em}
.foot-bottom{margin-top:48px;padding-top:24px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}

@media (max-width:1020px){
  .article-layout{grid-template-columns:1fr;gap:32px}
  .aside{order:0;position:static;max-height:none}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  .brand{font-size:20px}
  .brand img{width:32px;height:32px}
  .header .btn{display:none}
  .page-hero{padding:44px 0 40px;border-radius:0 0 32px 32px}
  main{padding-top:40px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
}