:root{
--ink:#1D1D1F;
--accent:#5F6169;
--white:#FFFFFF;
--gray:#F4F4F5;
--muted:rgba(29,29,31,.60);
--line:rgba(29,29,31,.10);
--line-strong:rgba(29,29,31,.16);
--maxw:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
margin:0;
font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
font-weight:300;
font-size:17px;
line-height:1.72;
color:var(--ink);
background:var(--white);
-webkit-font-smoothing:antialiased;
text-rendering:optimizeLegibility;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
strong,b{font-weight:700}
/* ---------- header ---------- */
header.site{
border-bottom:1px solid var(--line);
background:var(--white);
}
.site-inner{
max-width:var(--maxw);
margin:0 auto;
padding:22px 28px;
display:flex;
align-items:center;
justify-content:space-between;
gap:16px;
}
.site-tag{font-size:15px;font-weight:600;color:var(--ink);letter-spacing:.01em}
/* ---------- title block ---------- */
.hero{
max-width:var(--maxw);
margin:0 auto;
padding:56px 28px 8px;
}
.hero h1{
font-weight:300;
font-size:clamp(34px,5vw,50px);
line-height:1.08;
letter-spacing:-.02em;
margin:0 0 18px;
}
.hero .lede{
font-size:clamp(17px,2.1vw,20px);
color:var(--ink);
max-width:60ch;
margin:0 0 22px;
}
.meta{
display:inline-flex;
flex-wrap:wrap;
gap:8px 10px;
align-items:center;
background:var(--gray);
border:1px solid var(--line);
border-radius:999px;
padding:7px 16px;
font-size:13.5px;
color:var(--muted);
}
.meta b{color:var(--ink);font-weight:700}
.meta .dot{width:4px;height:4px;border-radius:50%;background:var(--muted);display:inline-block}
/* ---------- layout ---------- */
.wrap{
max-width:var(--maxw);
margin:0 auto;
padding:28px 28px 40px;
display:grid;
grid-template-columns:236px 1fr;
gap:52px;
align-items:start;
}
/* desktop sticky TOC */
aside.toc{position:sticky;top:24px;align-self:start}
aside.toc .toc-title{
font-size:12px;letter-spacing:.13em;text-transform:uppercase;
color:var(--muted);font-weight:700;margin:0 0 12px;padding-left:14px;
}
aside.toc ol{list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}
aside.toc li a{
display:flex;gap:10px;align-items:baseline;
padding:7px 0 7px 14px;margin-left:-1px;
color:var(--muted);font-size:14.5px;line-height:1.35;
border-left:2px solid transparent;
}
aside.toc li a:hover{color:var(--ink);text-decoration:none}
aside.toc li a.active{color:var(--ink);border-left-color:var(--accent);font-weight:400}
.toc-num{color:var(--accent);font-weight:700;font-size:12.5px;min-width:18px}
/* mobile TOC */
details.toc-m{
display:none;
background:var(--gray);border:1px solid var(--line);
border-radius:12px;margin:0 0 30px;padding:4px 18px;
}
details.toc-m summary{
cursor:pointer;list-style:none;font-weight:700;font-size:15px;
padding:14px 0;display:flex;justify-content:space-between;align-items:center;
}
details.toc-m summary::-webkit-details-marker{display:none}
details.toc-m summary::after{content:"+";color:var(--accent);font-weight:700;font-size:20px}
details.toc-m[open] summary::after{content:"-"}
details.toc-m ol{list-style:none;margin:0;padding:0 0 12px}
details.toc-m li a{display:flex;gap:10px;padding:8px 0;color:var(--ink);font-size:15px}
/* ---------- content ---------- */
main{max-width:720px}
section{scroll-margin-top:24px;padding:14px 0 6px}
section + section{border-top:1px solid var(--line);margin-top:30px;padding-top:38px}
h2{
font-weight:300;font-size:clamp(24px,3.2vw,30px);line-height:1.18;
letter-spacing:-.015em;margin:0 0 18px;display:flex;gap:14px;align-items:baseline;
}
h2 .num{color:var(--accent);font-weight:700;font-size:.62em;letter-spacing:0}
h3{
font-weight:700;font-size:17px;line-height:1.4;
margin:30px 0 8px;color:var(--ink);
}
p{margin:0 0 16px}
.muted{color:var(--muted)}
ul{margin:0 0 18px;padding:0;list-style:none}
ul li{position:relative;padding:0 0 0 24px;margin:0 0 11px}
ul li::before{
content:"";position:absolute;left:2px;top:.62em;
width:6px;height:6px;border-radius:50%;background:var(--accent);
}
ul li strong{color:var(--ink)}
/* role cards */
.cards{
display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:22px 0 6px;
}
.card{
background:var(--gray);border:1px solid var(--line);border-radius:14px;
padding:20px 18px;
}
.card .ic{
width:34px;height:34px;color:var(--accent);margin-bottom:14px;
}
.card .ic svg{width:100%;height:100%}
.card .who{font-weight:700;font-size:15.5px;margin:0 0 4px}
.card .role{font-size:12px;letter-spacing:.07em;text-transform:uppercase;color:var(--accent);font-weight:700;margin:0 0 10px}
.card p{font-size:14.5px;line-height:1.6;color:var(--ink);margin:0}
/* callouts */
.note{
background:var(--gray);border:1px solid var(--line);
border-left:3px solid var(--accent);border-radius:0 12px 12px 0;
padding:16px 20px;margin:20px 0;
}
.note .lbl{
font-size:12px;letter-spacing:.09em;text-transform:uppercase;
color:var(--accent);font-weight:700;margin:0 0 6px;
}
.note p{margin:0;font-size:15px;line-height:1.62}
/* dark promise panel */
.promise{
background:var(--ink);color:var(--white);border-radius:16px;
padding:26px 26px;margin:24px 0;
}
.promise .lbl{
font-size:12px;letter-spacing:.1em;text-transform:uppercase;
color:rgba(255,255,255,.66);font-weight:700;margin:0 0 10px;
}
.promise p{margin:0;font-size:18px;line-height:1.5;font-weight:300}
.promise p strong{font-weight:700}
.promise .sub{font-size:13.5px;color:rgba(255,255,255,.62);margin-top:10px}
/* placeholders */
.ph{
display:inline;background:var(--gray);color:var(--accent);
border:1px dashed rgba(29,29,31,.32);border-radius:6px;
padding:1px 7px;font-size:.86em;font-weight:400;
}
/* contact block */
.contact-card{
background:var(--gray);border:1px solid var(--line);border-radius:14px;
padding:22px 22px;margin:6px 0 18px;
}
.contact-card .ent{font-weight:700;margin-bottom:2px}
.contact-card ul li::before{display:none}
.contact-card ul li{padding-left:0}
/* footer */
footer.site{border-top:1px solid var(--line);margin-top:24px;background:var(--white)}
.foot-inner{
max-width:var(--maxw);margin:0 auto;padding:26px 28px 40px;
display:flex;flex-wrap:wrap;gap:10px 18px;justify-content:space-between;
align-items:center;font-size:13px;color:var(--muted);
}
.foot-inner a{color:var(--muted)}
.foot-inner a:hover{color:var(--accent)}
.trans{
max-width:var(--maxw);margin:0 auto;padding:0 28px;
}
.trans p{font-size:13px;color:var(--muted);border-top:1px dashed var(--line);
padding-top:18px;margin:0;line-height:1.6}
/* back to top */
#top{
position:fixed;right:22px;bottom:22px;width:44px;height:44px;
border-radius:12px;background:var(--accent);color:#fff;border:none;cursor:pointer;
display:flex;align-items:center;justify-content:center;
opacity:0;visibility:hidden;transition:opacity .2s, transform .2s;
box-shadow:0 6px 22px rgba(29,29,31,.20);
}
#top svg{width:20px;height:20px}
#top.show{opacity:1;visibility:visible}
#top:hover{transform:translateY(-2px)}
/* responsive */
@media (max-width:920px){
.wrap{grid-template-columns:1fr;gap:0;padding-top:8px}
aside.toc{display:none}
details.toc-m{display:block}
main{max-width:none}
.cards{grid-template-columns:1fr}
.hero{padding-top:40px}
}
/* ---------- links de cuerpo ----------
Sin color de marca: se leen como link por el subrayado, no por el azul.
El TOC se excluye abajo para no llenarlo de subrayados. */
main p a, main li a, .contact-card a{
color:var(--ink);
text-decoration:underline;
text-underline-offset:2px;
text-decoration-thickness:1px;
text-decoration-color:rgba(29,29,31,.35);
}
main p a:hover, main li a:hover, .contact-card a:hover{text-decoration-color:var(--ink)}
aside.toc li a, details.toc-m li a{text-decoration:none}
.lang-picker{margin-left:auto;position:relative;display:inline-flex;align-items:center}
.lang-picker svg{position:absolute;left:12px;width:15px;height:15px;color:#4a4a4f;pointer-events:none}
.lang-picker select{-webkit-appearance:none;appearance:none;font:600 13px/1.2 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans",sans-serif;letter-spacing:.01em;color:var(--ink);background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8' fill='none' stroke='%234a4a4f' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M1 1.5l5 5 5-5'/%3E%3C/svg%3E") no-repeat right 13px center/10px 7px;border:1px solid #d8d8dc;border-radius:999px;padding:8px 34px 8px 34px;max-width:62vw;cursor:pointer;transition:border-color .15s ease}
.lang-picker select:hover{border-color:var(--ink)}
.lang-picker select:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
html.pp-wait #doc{visibility:hidden}
@media (max-width:600px){.site-tag{line-height:1.35;min-width:0}}