/* Metalglass · guías. Misma identidad que la portada: banda amarilla de marca, fichas sobrias, datos en mono. */
:root{
  --bg:#F5F6F9; --surface:#FFFFFF; --ink:#16204A; --muted:#566084; --line:#D8DCE7;
  --sun:#F6C21C; --on-sun:#16204A; --sun-soft:#FFF4C9;
  --glass:#CFE2EC; --glass-hi:#EAF4F8; --frame:#F3F4F6; --frame-edge:#9AA2B6; --seal:#3A4466; --butyl:#111827; --dots:#7A6A2A;
  --wa:#1F8F4E; --cta:#16204A; --on-cta:#F5F6F9;
  --f-display:"Barlow Condensed","Arial Narrow","Roboto Condensed",sans-serif;
  --f-body:"Barlow","Segoe UI",system-ui,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
  --r:6px; --wrap:1120px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0D1330; --surface:#151D3F; --ink:#ECEFF8; --muted:#A2A9C8; --line:#29335F;
  --sun:#F6C21C; --on-sun:#16204A; --sun-soft:#3A3416;
  --glass:#2C4A61; --glass-hi:#3E6380; --frame:#E6E8EE; --frame-edge:#9AA2B6; --seal:#C9D0E6; --butyl:#E6E8EE; --dots:#E8D489;
  --wa:#34B36A; --cta:#1D2754; --on-cta:#ECEFF8; color-scheme:dark }}
:root[data-theme="dark"]{
  --bg:#0D1330; --surface:#151D3F; --ink:#ECEFF8; --muted:#A2A9C8; --line:#29335F;
  --sun:#F6C21C; --on-sun:#16204A; --sun-soft:#3A3416;
  --glass:#2C4A61; --glass-hi:#3E6380; --frame:#E6E8EE; --frame-edge:#9AA2B6; --seal:#C9D0E6; --butyl:#E6E8EE; --dots:#E8D489;
  --wa:#34B36A; --cta:#1D2754; --on-cta:#ECEFF8; color-scheme:dark }

*{box-sizing:border-box}
html{scroll-padding-top:90px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
h1,h2,h3{font-family:var(--f-display);line-height:1.05;margin:0;text-wrap:balance}
p{margin:0}
a{color:inherit}
:focus-visible{outline:3px solid var(--sun);outline-offset:2px;border-radius:3px}
.wrap{max-width:var(--wrap);margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.eyebrow{font-family:var(--f-mono);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:16px;z-index:50;background:var(--surface);padding:8px 12px}

/* Header y botones (como la portada) */
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--sun);color:var(--on-sun);border-bottom:2px solid var(--on-sun)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:10px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand .mg{font-family:var(--f-display);font-weight:800;font-style:italic;font-size:34px;line-height:1;letter-spacing:-.04em;color:#111}
.brand .mg b{color:#1E7A3A;font-weight:800}
.brand .name{font-family:var(--f-display);font-weight:700;font-size:15px;letter-spacing:.18em;text-transform:uppercase;line-height:1.1}
.brand .name small{display:block;font-family:var(--f-mono);font-weight:400;font-size:10.5px;letter-spacing:.08em;opacity:.8}
nav.links{display:flex;gap:22px;align-items:center}
nav.links a{text-decoration:none;font-weight:600;font-size:15px}
nav.links a:hover,nav.links a[aria-current]{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--f-display);font-weight:700;font-size:18px;letter-spacing:.04em;text-transform:uppercase;text-decoration:none;padding:10px 18px;border-radius:var(--r);border:2px solid currentColor;cursor:pointer;background:none;color:inherit}
.btn-solid{background:var(--on-sun);color:var(--sun);border-color:var(--on-sun)}
.btn-solid:hover{filter:brightness(1.25)}
.btn-wa{background:var(--wa);color:#fff;border-color:var(--wa)}
.btn-wa:hover{filter:brightness(1.1)}
.btn svg{width:18px;height:18px;flex:none}
@media (max-width:820px){nav.links a:not(.btn){display:none}}

/* Cabecera de guía */
.g-head{background:var(--sun);color:var(--on-sun)}
.g-head .wrap{padding-block:28px 40px}
.crumbs{font-family:var(--f-mono);font-size:13px;display:flex;flex-wrap:wrap;gap:4px 8px;align-items:center}
.crumbs a{text-decoration:none;border-bottom:1px solid currentColor}
.crumbs span[aria-hidden]{opacity:.6}
.g-head .eyebrow{color:var(--on-sun);opacity:.75;margin-top:26px}
.g-head h1{font-size:clamp(36px,5.4vw,64px);font-weight:800;text-transform:uppercase;margin-top:10px;max-width:22ch}
.g-meta{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:18px;font-family:var(--f-mono);font-size:13px}

/* Cuerpo */
.g-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start;padding-block:48px 72px}
@media (max-width:920px){.g-layout{grid-template-columns:minmax(0,1fr);gap:32px}}
.summary{background:var(--sun-soft);padding:20px 22px;border-radius:var(--r);display:grid;gap:8px}
.summary .eyebrow{color:var(--ink)}
.summary p{font-size:19px;line-height:1.6}
article.prose{min-width:0;max-width:70ch}
.prose > * + *{margin-top:18px}
.prose h2{font-size:clamp(28px,3.4vw,38px);font-weight:800;text-transform:uppercase;margin-top:48px;padding-top:4px}
.prose h3{font-size:24px;font-weight:700;text-transform:uppercase}
.prose p,.prose li{font-size:18px;line-height:1.7}
.prose a{text-decoration-color:var(--sun);text-decoration-thickness:3px;text-underline-offset:3px;font-weight:600}
.prose a:hover{background:var(--sun-soft)}
.prose ul{list-style:none;padding:0;display:grid;gap:10px}
.prose ul li{position:relative;padding-left:22px}
.prose ul li::before{content:"";position:absolute;left:0;top:11px;width:9px;height:9px;background:var(--sun);outline:1px solid var(--on-sun)}
.prose ol{padding:0;list-style:none;counter-reset:n;display:grid;gap:12px}
.prose ol li{counter-increment:n;position:relative;padding-left:40px}
.prose ol li::before{content:counter(n);position:absolute;left:0;top:2px;font-family:var(--f-mono);font-weight:500;font-size:14px;line-height:26px;text-align:center;background:var(--ink);color:var(--bg);width:26px;height:26px;border-radius:3px}
.prose .small{font-size:15px;color:var(--muted)}
.prose strong{font-weight:600}

.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
.tbl table{width:100%;border-collapse:collapse;min-width:480px;font-size:16px}
.tbl th,.tbl td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.5}
.tbl tr:last-child th,.tbl tr:last-child td{border-bottom:0}
.tbl thead th{font-family:var(--f-display);font-size:18px;text-transform:uppercase;letter-spacing:.03em;background:var(--bg)}
.tbl tbody th{font-weight:600;color:var(--muted)}
.tbl td.num{font-family:var(--f-mono);font-variant-numeric:tabular-nums;white-space:nowrap}

figure{margin:0}
figure.photo img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r)}
figure figcaption{font-size:14.5px;color:var(--muted);margin-top:8px}
figure.diagram{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;overflow-x:auto}
figure.diagram svg{display:block;width:100%;min-width:460px;height:auto}
.d-glass{fill:var(--glass);stroke:var(--frame-edge)}
.d-gap{fill:var(--glass-hi);opacity:.55}
.d-spacer{fill:var(--frame);stroke:var(--frame-edge)}
.d-dots circle{fill:var(--dots)}
.d-butyl{fill:var(--butyl)}
.d-seal{fill:var(--seal)}
.d-lead path{stroke:var(--muted);stroke-width:1;fill:none}
.d-label text{fill:var(--ink);font-family:var(--f-body);font-size:14px}
.d-dim path{stroke:var(--muted);stroke-width:1}
.d-dim text{fill:var(--muted);font-family:var(--f-mono);font-size:12px}

.wtypes{display:grid;gap:14px}
.wtype{display:grid;grid-template-columns:72px 1fr;gap:16px;align-items:start;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px}
.wtype h3{margin-bottom:4px}
.wtype p{font-size:16.5px !important}
.w-icon{width:72px;height:72px}
.i-frame{fill:var(--frame);stroke:var(--ink);stroke-width:2.5}
.i-sash{fill:var(--glass);stroke:var(--ink);stroke-width:1.5}
.i-sym{fill:none;stroke:var(--ink);stroke-width:1.6}
.i-sym.dash{stroke-dasharray:4 3}

/* Preguntas frecuentes */
.faq{display:grid;gap:10px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--r)}
.faq summary{cursor:pointer;list-style:none;padding:14px 48px 14px 18px;font-weight:600;font-size:17.5px;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);font-family:var(--f-mono);font-size:20px;color:var(--muted)}
.faq details[open] summary::after{content:"−"}
.faq details > div{padding:0 18px 16px;color:var(--muted)}
.faq details > div p{font-size:16.5px !important}

/* Lateral */
aside.g-side{position:sticky;top:calc(env(safe-area-inset-top,0px) + 92px);display:grid;gap:20px;min-width:0}
@media (max-width:920px){aside.g-side{position:static;order:-1}}
.toc{border-top:2px solid var(--ink);padding-top:12px}
.toc ol{list-style:none;margin:10px 0 0;padding:0;display:grid;gap:8px;counter-reset:t}
.toc li{counter-increment:t;display:flex;gap:10px;font-size:15.5px;line-height:1.35}
.toc li::before{content:counter(t,decimal-leading-zero);font-family:var(--f-mono);font-size:12px;color:var(--muted);padding-top:2px}
.toc a{text-decoration:none}
.toc a:hover{text-decoration:underline}
.side-cta{background:var(--cta);color:var(--on-cta);border-radius:var(--r);padding:20px;display:grid;gap:12px}
.side-cta p{font-size:15.5px}
.side-cta b{font-family:var(--f-display);font-size:24px;text-transform:uppercase;line-height:1.05}
@media (max-width:920px){.side-cta{display:none}}

/* CTA final */
.cta{background:var(--cta);color:var(--on-cta)}
.cta .wrap{display:flex;flex-wrap:wrap;gap:20px 40px;align-items:center;justify-content:space-between;padding-block:40px}
.cta h2{font-size:clamp(28px,4vw,44px);font-weight:800;text-transform:uppercase}
.cta p{opacity:.85;margin-top:6px;max-width:52ch}
.cta .row{display:flex;flex-wrap:wrap;gap:12px}
.cta .btn-ghost{color:var(--on-cta)}

/* Relacionadas y tarjetas de guía */
.related{padding-block:56px 72px}
.related h2{font-size:clamp(26px,3vw,34px);font-weight:800;text-transform:uppercase;margin-bottom:22px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:860px){.cards{grid-template-columns:1fr 1fr}}
@media (max-width:540px){.cards{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px;text-decoration:none;display:flex;flex-direction:column;gap:10px;min-width:0;transition:border-color .2s}
.card:hover{border-color:var(--ink)}
.card h3{font-size:24px;font-weight:700;text-transform:uppercase}
.card p{font-size:15.5px;color:var(--muted)}
.card .foot{margin-top:auto;padding-top:10px;border-top:1px dashed var(--line);font-family:var(--f-mono);font-size:12.5px;color:var(--muted);display:flex;justify-content:space-between}

/* Índice de guías */
.hub-head .wrap{padding-block:36px 48px}
.hub-head h1{font-size:clamp(44px,7vw,88px);font-weight:800;text-transform:uppercase;margin-top:10px}
.hub-head p.lede{max-width:56ch;font-size:19px;margin-top:16px}
.hub{padding-block:48px 72px}
.hub .cards{grid-template-columns:repeat(2,1fr)}
@media (max-width:640px){.hub .cards{grid-template-columns:1fr}}

footer{background:var(--sun);color:var(--on-sun)}
footer .wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:20px 40px;padding-block:28px}
footer nav{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:14.5px;align-content:start}
footer a{font-weight:600}
footer p{font-size:14.5px}
@media (max-width:720px){footer .wrap{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*{transition:none !important}}