:root{--ink:#102d43;--muted:#607487;--blue:#1776c9;--blue2:#0e5f9f;--pale:#f3f7fa;--line:#d9e3ea;--dark:#0c3551;--white:#fff;--max:1160px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.55}a{color:inherit;text-decoration:none}.container{width:min(var(--max),calc(100% - 40px));margin:auto}.topbar{background:#0b314b;color:#d8e8f3;font-size:13px}.topbar .container{display:flex;justify-content:center;gap:26px;padding:9px 0}header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.nav{min-height:84px;display:flex;align-items:center;justify-content:space-between;gap:24px}.logo img{display:block;width:154px;height:auto}.navlinks{display:flex;align-items:center;gap:25px;font-weight:700;font-size:14px}.navlinks a:hover,.navlinks a.active{color:var(--blue)}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:14px 22px;font-weight:800;border:1px solid transparent;cursor:pointer}.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue2)}.btn-secondary{border-color:#b9cbd8;background:#fff}.mobile{display:none;border:0;background:transparent;font-size:28px}.hero{padding:88px 0 72px;background:linear-gradient(135deg,#fff 35%,#f0f6fa)}.eyebrow{text-transform:uppercase;letter-spacing:.16em;color:var(--blue);font-size:12px;font-weight:800}.hero h1{font-size:clamp(46px,6vw,78px);line-height:1.02;letter-spacing:-.045em;margin:14px 0 22px;max-width:900px}.lead{font-size:20px;color:var(--muted);max-width:780px}.hero-actions{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}.section{padding:74px 0}.section.pale{background:var(--pale)}.head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}.head h2{font-size:38px;line-height:1.12;margin:8px 0 0;letter-spacing:-.03em}.filters{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:32px}.filter{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 15px;font:inherit;font-weight:700;color:var(--ink);cursor:pointer}.filter.active{background:var(--dark);color:#fff;border-color:var(--dark)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.card{border:1px solid var(--line);border-radius:22px;background:#fff;overflow:hidden;box-shadow:0 12px 35px rgba(16,45,67,.07);display:flex;flex-direction:column}.cover{aspect-ratio:1/1;background:#e8eef2;overflow:hidden}.cover img{width:100%;height:100%;object-fit:cover;display:block}.body{padding:24px;display:flex;flex-direction:column;flex:1}.kicker{font-size:12px;color:var(--blue);font-weight:800;text-transform:uppercase;letter-spacing:.11em}.card h3{font-size:24px;line-height:1.15;margin:10px 0}.card p{color:var(--muted);margin:0 0 18px}.tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:auto;margin-bottom:18px}.tag{font-size:12px;background:#eef5fa;color:#315a77;border-radius:999px;padding:6px 9px}.link{color:var(--blue);font-weight:800}.cta{padding:72px 0}.cta-box{background:var(--dark);color:#fff;border-radius:28px;padding:44px;display:flex;justify-content:space-between;align-items:center;gap:30px}.cta-box h2{font-size:38px;line-height:1.1;margin:7px 0 10px}.cta-box p{color:#cfe0eb;margin:0}.cta-box .btn{background:#fff;color:var(--dark)}footer{background:#092a40;color:#d6e4ed;padding:50px 0 25px}.foot{display:grid;grid-template-columns:2fr 1fr 1fr;gap:35px}.foot h4{color:#fff;margin-top:0}.foot a{display:block;margin:8px 0;color:#d6e4ed}.bottom{border-top:1px solid rgba(255,255,255,.15);margin-top:35px;padding-top:20px;display:flex;justify-content:space-between;font-size:13px}.detail-hero{padding:64px 0;background:var(--pale)}.detail-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:55px;align-items:center}.detail-hero h1{font-size:54px;line-height:1.04;letter-spacing:-.04em;margin:12px 0 18px}.detail-cover{border-radius:24px;overflow:hidden;box-shadow:0 18px 45px rgba(16,45,67,.15)}.detail-cover img{width:100%;display:block}.content-grid{display:grid;grid-template-columns:1.4fr .6fr;gap:60px}.content h2{font-size:32px;margin-top:0}.content h3{font-size:22px;margin-top:30px}.content li{margin:9px 0}.aside{border:1px solid var(--line);border-radius:20px;padding:25px;height:max-content;position:sticky;top:115px}.aside .btn{width:100%;margin:6px 0}.meta{font-size:14px;color:var(--muted);margin-top:18px}.note{font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:15px;margin-top:18px}@media(max-width:900px){.topbar{display:none}.nav{min-height:72px}.navlinks{display:none;position:absolute;left:0;right:0;top:72px;background:#fff;padding:20px;flex-direction:column;align-items:stretch;border-bottom:1px solid var(--line)}.navlinks.open{display:flex}.mobile{display:block}.grid{grid-template-columns:1fr 1fr}.detail-grid,.content-grid{grid-template-columns:1fr}.aside{position:static}.foot{grid-template-columns:1fr 1fr}.head{align-items:start;flex-direction:column}.detail-hero h1{font-size:44px}}@media(max-width:620px){.container{width:min(100% - 28px,var(--max))}.hero{padding:60px 0 50px}.hero h1{font-size:46px}.grid{grid-template-columns:1fr}.section{padding:56px 0}.cta-box{padding:30px;display:block}.cta-box .btn{margin-top:22px}.foot{grid-template-columns:1fr}.bottom{display:block}.detail-hero h1{font-size:39px}.head h2,.cta-box h2{font-size:32px}}

/* Sprint 2 v1.2 — biblioteca por estanterías desplegables */
.library-shelves{display:grid;gap:18px}.shelf{border:1px solid var(--line);border-radius:22px;background:#fff;overflow:hidden;box-shadow:0 10px 30px rgba(16,45,67,.045)}.shelf-toggle{width:100%;border:0;background:#fff;color:var(--ink);padding:28px 30px;display:flex;align-items:center;justify-content:space-between;gap:28px;text-align:left;cursor:pointer;font:inherit}.shelf-toggle:hover{background:#f9fbfc}.shelf-toggle h3{font-size:28px;line-height:1.15;letter-spacing:-.025em;margin:5px 0 7px}.shelf-toggle p{margin:0;color:var(--muted);max-width:780px}.shelf-label{font-size:11px;color:var(--blue);font-weight:800;text-transform:uppercase;letter-spacing:.14em}.shelf-icon{width:42px;height:42px;flex:0 0 42px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;font-size:25px;font-weight:500;color:var(--blue)}.shelf.open .shelf-toggle{border-bottom:1px solid var(--line)}.shelf-content{padding:8px 30px 12px}.resource-row{display:grid;grid-template-columns:160px 1fr;gap:28px;padding:24px 0;border-bottom:1px solid var(--line);align-items:center}.resource-row:last-child{border-bottom:0}.resource-thumb{width:160px;height:118px;border-radius:14px;overflow:hidden;background:#e8eef2}.resource-thumb img{width:100%;height:100%;object-fit:cover;display:block}.resource-copy h4{font-size:23px;line-height:1.18;margin:7px 0 9px}.resource-copy p{color:var(--muted);margin:0 0 12px;max-width:760px}.resource-copy .tags{margin:0 0 11px}.resource-copy .link{display:inline-block}@media(max-width:700px){.shelf-toggle{padding:22px 20px}.shelf-toggle h3{font-size:23px}.shelf-content{padding:4px 20px 8px}.resource-row{grid-template-columns:92px 1fr;gap:16px;padding:20px 0;align-items:start}.resource-thumb{width:92px;height:112px}.resource-copy h4{font-size:19px}.resource-copy p{font-size:14px}.shelf-icon{width:36px;height:36px;flex-basis:36px}}@media(max-width:480px){.resource-row{grid-template-columns:1fr}.resource-thumb{width:110px;height:134px}.shelf-toggle p{font-size:14px}}


/* Ajustes baseline v1.2 — tags superiores + recursos individualizados */
.resource-filters{margin:0 0 28px;align-items:center}
.resource-filters .filter{padding:11px 18px;box-shadow:0 2px 8px rgba(16,45,67,.03)}
.resource-filters .filter:hover{border-color:#b9cbd8;background:#f9fbfc}
.resource-filters .filter.active:hover{background:var(--dark);border-color:var(--dark)}
.library-shelves{gap:20px}
.shelf-content{padding:18px 30px 24px;background:#f7fafc}
.resource-row{border:1px solid var(--line);border-radius:18px;background:#fff;padding:20px;margin:0 0 16px;box-shadow:0 8px 24px rgba(16,45,67,.055);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.resource-row:last-child{border-bottom:1px solid var(--line);margin-bottom:0}
.resource-row:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(16,45,67,.08);border-color:#c8d7e1}
.resource-row[hidden]{display:none!important}
.shelf[data-filter-empty="true"]{display:none}
@media(max-width:700px){.resource-filters{margin-bottom:22px}.resource-filters .filter{padding:9px 14px}.shelf-content{padding:14px 16px 18px}.resource-row{padding:16px;margin-bottom:12px}}

/* Filtrado de biblioteca: asegurar que las áreas sin coincidencias desaparezcan. */
.shelf[hidden]{display:none!important}


/* Sprint 2 integration: approved Home footer */
footer{background:#081f31;color:#cbd9e4;padding:65px 0 24px}
.foot{display:grid;grid-template-columns:1.35fr repeat(3,1fr);gap:38px}
footer h4{color:#fff;margin-top:0}
footer a{display:block;margin:9px 0;color:#cbd9e4}
.bottom{border-top:1px solid #244156;margin-top:42px;padding-top:20px;display:flex;justify-content:space-between;font-size:.85rem}
.logo-img{display:flex;align-items:center}
.logo-img img{width:154px;height:auto;display:block}
.logo-footer img{filter:brightness(0) invert(1);opacity:.96}
@media(max-width:900px){.foot{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.foot{grid-template-columns:1fr}.bottom{display:block}.logo-img img{width:132px}}