:root{
  --siv-blue:#073a83;
  --siv-blue-2:#0b58b5;
  --siv-ink:#162033;
  --siv-muted:#5d6778;
  --siv-bg:#f5f8fc;
  --siv-line:#dbe4ef;
  --siv-accent:#f1b433;
  --siv-white:#fff;
}
html{scroll-behavior:smooth}
body{background:#fff;color:var(--siv-ink)}
.siv-hero{padding:72px 0 56px;background:linear-gradient(135deg,#f7faff 0%,#eef5ff 60%,#fff 100%);overflow:hidden}
.siv-hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:54px;align-items:center}
.siv-kicker{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.12em;color:var(--siv-blue);margin-bottom:14px}
.siv-kicker:before{content:"";width:34px;height:3px;background:var(--siv-accent);border-radius:3px}
.siv-hero h1{font-size:clamp(2.2rem,4.5vw,4.45rem);line-height:1.02;letter-spacing:-.045em;margin:0 0 22px;color:#0d1c34}
.siv-hero h1 span{color:var(--siv-blue)}
.siv-lead{font-size:1.15rem;line-height:1.72;color:#435069;max-width:760px}
.term-cloud{display:flex;flex-wrap:wrap;gap:9px;margin:25px 0 30px}
.term-cloud span{padding:8px 12px;border:1px solid #ccd9e9;border-radius:999px;background:#fff;font-size:.82rem;font-weight:700;color:#28415f}
.siv-actions{display:flex;gap:12px;flex-wrap:wrap}
.siv-btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 20px;border-radius:9px;font-weight:800;text-decoration:none;transition:.2s ease}
.siv-btn.primary{background:var(--siv-blue);color:#fff}
.siv-btn.secondary{border:1px solid #b9c8da;color:var(--siv-blue);background:#fff}
.siv-btn:hover{transform:translateY(-2px)}
.siv-hero-visual{position:relative}
.siv-hero-visual img{width:100%;height:520px;object-fit:cover;border-radius:22px;box-shadow:0 24px 65px rgba(18,49,87,.18)}
.visual-note{position:absolute;left:-22px;bottom:24px;background:#fff;padding:15px 18px;border-radius:12px;box-shadow:0 12px 34px rgba(18,49,87,.16);max-width:250px;border-left:4px solid var(--siv-accent)}
.visual-note strong{display:block;color:var(--siv-blue);font-size:.94rem}
.visual-note span{display:block;color:var(--siv-muted);font-size:.78rem;margin-top:3px}
.siv-toc{background:#0c2342;color:#fff;padding:16px 0}
.siv-toc .container{display:flex;gap:18px;overflow:auto;white-space:nowrap;scrollbar-width:thin}
.siv-toc a{color:#d9e8fb;text-decoration:none;font-size:.83rem;font-weight:700;padding:5px 0}
.siv-toc a:hover{color:#fff}
.siv-section{padding:76px 0}
.siv-section.alt{background:var(--siv-bg)}
.section-head{max-width:850px;margin-bottom:36px}
.section-head .eyebrow{color:var(--siv-blue);font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.11em}
.section-head h2{font-size:clamp(1.8rem,3vw,2.85rem);line-height:1.12;letter-spacing:-.035em;margin:8px 0 14px;color:#10223d}
.section-head p{color:var(--siv-muted);line-height:1.75;font-size:1.02rem}
.definition-box{background:#fff;border:1px solid var(--siv-line);border-radius:18px;padding:30px;box-shadow:0 12px 34px rgba(16,45,82,.06)}
.definition-box p{font-size:1.08rem;line-height:1.8;color:#35445d;margin:0}
.definition-box strong{color:var(--siv-blue)}
.term-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}
.term-card,.tech-card{background:#fff;border:1px solid var(--siv-line);border-radius:15px;padding:24px}
.term-card h3,.tech-card h3{font-size:1.05rem;margin:0 0 9px;color:#142743}
.term-card p,.tech-card p{font-size:.92rem;color:var(--siv-muted);line-height:1.62;margin:0}
.note{margin-top:20px;padding:15px 18px;background:#fff8e7;border-left:4px solid var(--siv-accent);color:#514932;font-size:.92rem;line-height:1.65}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.prose h3{font-size:1.3rem;margin:25px 0 9px;color:#142743}
.prose p,.prose li{color:#4b586b;line-height:1.72}
.prose ul{padding-left:20px}
.figure{margin:0}
.figure img{width:100%;border-radius:16px;border:1px solid #dce5ef;background:#fff;box-shadow:0 12px 30px rgba(18,49,87,.07)}
.figure figcaption{font-size:.78rem;color:#758095;line-height:1.5;margin-top:9px}
.tech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.tech-card .num{font-size:.74rem;color:var(--siv-blue);font-weight:800;letter-spacing:.1em;text-transform:uppercase}
.tech-card h3{margin-top:7px}
.siv-callout{padding:28px 30px;border-radius:17px;background:#0c2342;color:#fff;margin-top:32px}
.siv-callout h3{margin:0 0 8px;font-size:1.35rem}
.siv-callout p{margin:0;color:#d5e2f4;line-height:1.68}
.book-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.book-card{background:#fff;border:1px solid var(--siv-line);border-radius:16px;padding:16px;display:flex;flex-direction:column;box-shadow:0 9px 26px rgba(18,49,87,.05)}
.book-card img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:10px}
.book-card h3{font-size:.98rem;line-height:1.35;margin:14px 0 7px;color:#142743}
.book-card p{font-size:.82rem;line-height:1.55;color:var(--siv-muted);margin:0 0 14px}
.book-card a{margin-top:auto;color:var(--siv-blue);font-weight:800;text-decoration:none;font-size:.84rem}
.author-card{display:grid;grid-template-columns:160px 1fr;gap:28px;align-items:center;background:#fff;border:1px solid var(--siv-line);padding:28px;border-radius:18px}
.author-card img{width:160px;height:160px;object-fit:cover;border-radius:50%}
.author-card h3{font-size:1.45rem;margin:0 0 5px}
.author-card p{color:var(--siv-muted);line-height:1.72;margin:6px 0}
.faq-list{display:grid;gap:12px}
.faq-list details{border:1px solid var(--siv-line);border-radius:12px;padding:0 20px;background:#fff}
.faq-list summary{cursor:pointer;padding:17px 0;font-weight:800;color:#17304f}
.faq-list p{margin:0 0 18px;color:#566277;line-height:1.68}
.siv-cta{background:linear-gradient(135deg,#073a83,#0b58b5);color:#fff;border-radius:22px;padding:42px;display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center}
.siv-cta h2{margin:0 0 9px;font-size:clamp(1.7rem,3vw,2.5rem);color:#fff}
.siv-cta p{margin:0;color:#dceafb;line-height:1.68}
.siv-cta .siv-btn{background:#fff;color:var(--siv-blue)}
.breadcrumbs{font-size:.78rem;color:#748095;margin-bottom:16px}
.breadcrumbs a{color:#55708f;text-decoration:none}
@media(max-width:1000px){
 .siv-hero-grid,.two-col{grid-template-columns:1fr}
 .siv-hero-visual img{height:430px}
 .visual-note{left:15px}
 .term-grid,.tech-grid{grid-template-columns:repeat(2,1fr)}
 .book-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:680px){
 .siv-hero{padding:44px 0 40px}
 .siv-hero-visual img{height:330px}
 .term-grid,.tech-grid,.book-grid{grid-template-columns:1fr}
 .author-card{grid-template-columns:1fr;text-align:center}
 .author-card img{margin:auto}
 .siv-cta{grid-template-columns:1fr;padding:28px}
 .siv-section{padding:54px 0}
}

.cluster-hub-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.cluster-hub-card{display:flex;flex-direction:column;min-height:170px;padding:22px;border:1px solid var(--siv-line);border-radius:15px;background:#fff;text-decoration:none;transition:.2s ease}.cluster-hub-card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(18,49,87,.08)}.cluster-hub-card span{font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em;color:var(--siv-blue)}.cluster-hub-card strong{font-size:1.02rem;line-height:1.4;color:#142743;margin:9px 0}.cluster-hub-card small{margin-top:auto;color:var(--siv-blue);font-weight:800}.deep-link{margin:18px 0 24px}.deep-link a{color:var(--siv-blue);font-weight:800;text-decoration:none}@media(max-width:900px){.cluster-hub-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:620px){.cluster-hub-grid{grid-template-columns:1fr}}

/* Directorio visual del cluster SIV */
.cluster-directory{position:relative;overflow:hidden}
.cluster-directory:before{content:"";position:absolute;right:-160px;top:-180px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(11,88,181,.08),rgba(11,88,181,0) 68%);pointer-events:none}
.cluster-head{max-width:900px}
.cluster-groups{display:grid;gap:28px}
.cluster-group{background:#fff;border:1px solid var(--siv-line);border-radius:20px;padding:28px;box-shadow:0 12px 34px rgba(18,49,87,.045)}
.cluster-group-head{display:grid;grid-template-columns:54px 1fr;gap:16px;align-items:start;margin-bottom:20px}
.cluster-index{display:flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:12px;background:#edf4ff;color:var(--siv-blue);font-weight:800;font-size:.82rem;letter-spacing:.08em}
.cluster-group-head h3{margin:1px 0 5px;color:#10223d;font-size:1.35rem}
.cluster-group-head p{margin:0;color:var(--siv-muted);font-size:.93rem;line-height:1.55}
.cluster-group .cluster-hub-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.cluster-hub-card{min-height:0;padding:20px;border-color:#e0e8f2;position:relative;overflow:hidden}
.cluster-hub-card:after{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--siv-blue);opacity:0;transition:.2s ease}
.cluster-hub-card:hover{border-color:#c7d7ea;box-shadow:0 12px 30px rgba(18,49,87,.09)}
.cluster-hub-card:hover:after{opacity:1}
.cluster-hub-card strong{font-size:1.01rem;margin:7px 0 8px}
.cluster-hub-card p{margin:0 0 16px;color:var(--siv-muted);font-size:.86rem;line-height:1.55}
.cluster-hub-card small{font-size:.79rem}
.cluster-path{margin-top:28px;padding:24px 26px;border-radius:16px;background:#0c2342;color:#fff;display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center}
.cluster-path strong{display:block;font-size:1.06rem;margin-bottom:5px}
.cluster-path span{display:block;color:#cbd9eb;font-size:.9rem;line-height:1.55}
.cluster-path .siv-btn.primary{background:#fff;color:var(--siv-blue);white-space:nowrap}
@media(max-width:900px){.cluster-group .cluster-hub-grid{grid-template-columns:1fr}.cluster-path{grid-template-columns:1fr}}
@media(max-width:620px){.cluster-group{padding:20px}.cluster-group-head{grid-template-columns:44px 1fr}.cluster-index{width:40px;height:40px}.cluster-path{padding:20px}}