/* Páginas de proyecto: misma identidad que la portada (Montserrat + IBM Plex Sans, azul FJR y cobre) */
:root{
  --navy:#1A365D; --night:#0F2440; --ink-bg:#0C1B30; --copper:#B8742A; --copper-lt:#E0A35A;
  --paper:#F4F7FB; --line:#D5DEEA; --fg:#14243A; --muted:#586880; --on-dark:#C7D4E6;
  --f-display:"Montserrat",Arial,sans-serif; --f-body:"IBM Plex Sans",Arial,sans-serif;
  --wrap:1100px; --measure:66ch;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:17px/1.7 var(--f-body);color:var(--fg);background:#fff;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{font-family:var(--f-display);margin:0;text-wrap:balance}
p{margin:0}
:focus-visible{outline:2px solid var(--copper-lt);outline-offset:3px}
.wrap{max-width:var(--wrap);margin:0 auto;padding-left:max(22px,env(safe-area-inset-left));padding-right:max(22px,env(safe-area-inset-right))}

/* Encabezado fijo y sólido */
.top{position:sticky;top:0;z-index:40;background:var(--night)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:68px}
.top .mark{height:36px;width:auto}
.top nav{display:flex;align-items:center;gap:26px}
.top nav a{color:#fff;text-decoration:none;font:500 .95rem var(--f-display);opacity:.88}
.top nav a:hover{opacity:1;color:var(--copper-lt)}
.top .cta{opacity:1;border:1.5px solid var(--copper-lt);padding:10px 16px;border-radius:3px}
.top .cta:hover{background:var(--copper);border-color:var(--copper);color:#fff}
.top .track{opacity:1;border:1.5px solid rgba(255,255,255,.35);padding:10px 16px;border-radius:3px;margin-right:-12px}
.top .track:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}
@media (max-width:860px){.top .track{display:none}}
@media (max-width:640px){.top .hide-sm{display:none}}

/* Portada del caso */
.intro{background:var(--night);color:#fff;padding-block:64px 72px;position:relative;overflow:hidden}
.intro::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(143,179,224,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(143,179,224,.05) 1px,transparent 1px);background-size:48px 48px}
.intro .wrap{position:relative}
.back{display:inline-flex;align-items:center;gap:8px;color:var(--on-dark);text-decoration:none;font:500 .95rem var(--f-display);margin-bottom:34px}
.back:hover{color:var(--copper-lt)}
.back svg{width:16px;height:16px}
.where{color:var(--copper-lt);font:600 1rem var(--f-display);margin-bottom:14px;display:block}
.intro h1{font-size:clamp(2.1rem,4.6vw,3.5rem);font-weight:600;line-height:1.08;letter-spacing:-.02em;max-width:20ch}
.intro .lead{margin-top:20px;color:var(--on-dark);font-size:1.12rem;max-width:58ch}
.keyfacts{margin:40px 0 0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid rgba(255,255,255,.14)}
.keyfacts div{padding:20px 22px 0 0}
.keyfacts dt{color:var(--on-dark);font-size:.92rem}
.keyfacts dd{margin:6px 0 0;font:600 1.25rem/1.25 var(--f-display);color:#fff}
@media (max-width:760px){.keyfacts{grid-template-columns:1fr 1fr;gap:4px 0}}

/* Cuerpo del caso */
.body{padding-block:80px 40px}
.block{display:grid;grid-template-columns:240px minmax(0,1fr);gap:20px 56px;padding-block:44px;border-top:1px solid var(--line)}
.block:first-child{border-top:0;padding-top:0}
.block h2{font-size:1.5rem;font-weight:600;color:var(--navy);line-height:1.2;padding-bottom:16px;background:linear-gradient(90deg,#A8621E,var(--copper-lt)) left bottom/64px 2px no-repeat;align-self:start}
.block .content{display:grid;gap:16px;max-width:var(--measure);color:var(--muted)}
.block .content strong{color:var(--fg);font-weight:600}
.block ul,.block ol{margin:0;padding-left:20px;display:grid;gap:8px}
.block li::marker{color:var(--copper)}
@media (max-width:820px){.block{grid-template-columns:1fr;gap:18px}}

/* Láminas: esquemas dibujados a partir del proyecto */
.sheet{margin:8px 0 0;background:var(--night);border:1px solid rgba(224,163,90,.35);padding:28px}
.sheet svg{width:100%;height:auto;display:block}
.sheet figcaption{margin-top:16px;color:var(--on-dark);font-size:.9rem}
.full{max-width:none}

/* Tabla comparativa */
.cmp{overflow-x:auto}
.cmp table{width:100%;min-width:520px;border-collapse:collapse;font-size:.96rem}
.cmp th{background:var(--navy);color:#fff;font:600 .9rem var(--f-display);text-align:left;padding:11px 14px}
.cmp td{padding:11px 14px;border-bottom:1px solid var(--line);color:var(--fg)}
.cmp td.win{color:var(--navy);font-weight:600}

/* Cierre */
.next{padding-block:64px 90px}
.next .box{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px 40px;background:var(--night);color:#fff;padding:36px 40px;border-left:4px solid var(--copper)}
.next h2{font-size:1.4rem;font-weight:600;max-width:28ch;line-height:1.25}
.next p{margin-top:8px;color:var(--on-dark);max-width:52ch}
.btn{display:inline-flex;align-items:center;justify-content:center;font:600 .95rem/1 var(--f-display);text-decoration:none;padding:16px 26px;border-radius:3px;background:var(--copper);color:#fff;border:1.5px solid var(--copper)}
.btn:hover{background:#9C6122;border-color:#9C6122}
.others{margin-top:44px;display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center}
.others span{color:var(--muted)}
.others a{color:var(--navy);font:600 1rem var(--f-display);text-decoration:none;border-bottom:1.5px solid var(--copper-lt)}
.others a:hover{color:var(--copper)}
@media (max-width:560px){.next .box{padding:28px 24px}}

footer{border-top:4px solid var(--copper);padding-block:34px}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;align-items:center;color:var(--muted);font-size:.9rem}
footer img{height:46px;width:auto}
footer a{color:var(--navy);text-decoration:none;font-weight:500}

.wa-float{position:fixed;z-index:60;right:calc(22px + env(safe-area-inset-right,0px));bottom:calc(22px + env(safe-area-inset-bottom,0px));width:58px;height:58px;border-radius:50%;background:#25D366;display:grid;place-items:center;box-shadow:0 8px 24px rgba(0,0,0,.28)}
.wa-float svg{width:30px;height:30px;fill:none;stroke:#fff;stroke-width:1.7}
@media (max-width:560px){.wa-float{width:52px;height:52px;right:calc(16px + env(safe-area-inset-right,0px));bottom:calc(16px + env(safe-area-inset-bottom,0px))}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}