/* Netustu — hoja de estilo común */

:root{
  --paper:#f4eee1;
  --paper-alt:#e8dfcc;
  --dark:#141414;
  --ink:#1a1814;
  --muted:#736c5b;
  --blue:#2b4a8c;
  --ochre:#8a6a1e;
  --rule:rgba(115,108,91,.42);
  --rule-dark:rgba(244,238,225,.28);
  --mono:ui-monospace, Consolas, "Liberation Mono", monospace;
  --sans:system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --step:80px;
}

*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  overflow-x:hidden;
}

img{display:block;max-width:100%;height:auto}

a{color:var(--blue)}
a:hover{color:var(--ink)}

:focus-visible{outline:2px solid var(--blue);outline-offset:3px}
.sec--dark :focus-visible{outline-color:var(--paper)}

.skip{
  position:absolute;left:-9999px;top:0;
  background:var(--ink);color:var(--paper);
  font-family:var(--mono);font-size:12px;
  padding:10px 16px;z-index:20;
}
.skip:focus{left:0}

/* ---------- rejilla de 12 columnas ---------- */

.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}

.grid{display:grid;grid-template-columns:repeat(12,1fr);column-gap:24px}

.rail{
  grid-column:1 / 3;
  font-family:var(--mono);
  font-size:11px;
  line-height:1.6;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--ochre);
}
.rail b{display:block;font-weight:700;font-size:13px;letter-spacing:.2em}
.rail span{display:block;color:var(--muted)}
.rail .scale{
  display:block;width:20px;height:118px;margin-top:14px;
  background-image:repeating-linear-gradient(to bottom,currentColor 0 1px,transparent 1px 11px);
  opacity:.7;
}
.rail--tall .scale{height:230px}

.col-text{grid-column:3 / 10}
.col-wide{grid-column:3 / 12}
.col-lead{grid-column:3 / 9}
.col-head{grid-column:3 / 11}

/* ---------- cabecera ---------- */

.site-head{border-bottom:1px solid var(--rule);background:var(--paper)}
.head-inner{
  display:flex;flex-wrap:wrap;align-items:baseline;
  justify-content:space-between;gap:8px 20px;padding:16px 0;
}
.brand{
  font-family:var(--mono);font-size:14px;font-weight:700;
  letter-spacing:.26em;text-transform:uppercase;
  color:var(--ink);text-decoration:none;
}
.brand:hover{color:var(--blue)}
.nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap}
.nav a{
  display:inline-block;padding:4px 0;margin-right:20px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);text-decoration:none;
}
.nav li:last-child a{margin-right:0}
.nav a:hover{color:var(--blue)}
.nav a[aria-current="page"]{color:var(--ink);box-shadow:inset 0 -2px 0 var(--blue)}

/* ---------- portada ---------- */

.hero{padding:72px 0 var(--step)}
h1{
  grid-column:3 / 11;
  margin:0;
  font-family:var(--mono);
  font-size:clamp(27px,4.3vw,50px);
  line-height:1.16;
  letter-spacing:.03em;
  text-transform:uppercase;
  font-weight:700;
}
h1 .l2{display:block;color:var(--muted)}
.hero-lead{grid-column:3 / 9;margin:28px 0 0;color:var(--ink)}
.hero-meta{
  grid-column:3 / 11;margin:26px 0 0;
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);
}

/* ---------- secciones ---------- */

.sec{padding:var(--step) 0}
.sec--alt{background:var(--paper-alt)}
.sec--dark{background:var(--dark);color:var(--paper)}
.sec--dark .rail{color:#c2933a}
.sec--dark .rail span{color:rgba(244,238,225,.6)}
.sec--dark h2{color:var(--paper)}
.sec--dark .note{color:rgba(244,238,225,.65)}

h2{
  margin:0 0 22px;
  font-family:var(--mono);
  font-size:clamp(17px,2.1vw,23px);
  line-height:1.3;
  letter-spacing:.09em;
  text-transform:uppercase;
  font-weight:700;
}
h3{
  margin:34px 0 10px;
  font-family:var(--mono);
  font-size:14px;letter-spacing:.13em;
  text-transform:uppercase;font-weight:700;
  color:var(--ink);
}
p{margin:0 0 20px}
p:last-child{margin-bottom:0}

.note{
  font-family:var(--mono);font-size:12px;line-height:1.7;
  letter-spacing:.06em;color:var(--muted);
}

.tick-row{
  height:24px;margin:30px 0;
  background-image:repeating-linear-gradient(to right,var(--ochre) 0 1px,transparent 1px 14px);
  opacity:.55;
}
.sec--dark .tick-row{background-image:repeating-linear-gradient(to right,#c2933a 0 1px,transparent 1px 14px)}

/* ---------- listas ---------- */

.list{list-style:none;margin:0;padding:0}
.list li{position:relative;padding-left:22px;margin-bottom:12px}
.list li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:10px;height:1px;background:var(--blue);
}
.list--cols{grid-column:3 / 12;columns:2;column-gap:40px}
.list--cols li{break-inside:avoid}
.sec--dark .list li::before{background:#c2933a}

.steps{margin:0;padding:0;list-style:none;counter-reset:st}
.steps li{position:relative;padding-left:44px;margin-bottom:16px;counter-increment:st}
.steps li::before{
  content:counter(st,decimal-leading-zero);
  position:absolute;left:0;top:.15em;
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;
  color:var(--ochre);
}

/* ---------- imágenes ---------- */

.figure-wide{margin:0;padding:0 0 var(--step)}
.figure-wide .img{grid-column:4 / 13;grid-row:1}
.figure-wide .cap{
  grid-column:1 / 4;grid-row:1;align-self:end;
  font-family:var(--mono);font-size:11px;line-height:1.7;
  letter-spacing:.1em;text-transform:uppercase;color:var(--muted);
  padding-bottom:4px;
}

.figure-tall{margin:0;grid-column:3 / 7}
.figure-tall figcaption{
  margin-top:12px;
  font-family:var(--mono);font-size:11px;line-height:1.7;
  letter-spacing:.1em;text-transform:uppercase;
  color:rgba(244,238,225,.62);
}
.col-side{grid-column:8 / 13}

/* ---------- contacto ---------- */

.contact-line{
  grid-column:3 / 10;margin:0;
  font-family:var(--mono);font-size:15px;letter-spacing:.08em;
}
.contact-line a{color:var(--blue)}

/* ---------- pie ---------- */

.site-foot{border-top:1px solid var(--rule);padding:34px 0 30px;background:var(--paper)}
.foot-row{
  display:flex;flex-wrap:wrap;align-items:center;
  justify-content:space-between;gap:14px 24px;
}
.foot-brand{
  font-family:var(--mono);font-size:13px;font-weight:700;
  letter-spacing:.24em;text-transform:uppercase;
}
.foot-links{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;justify-content:center}
.foot-links a{
  display:inline-block;margin:0 14px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);text-decoration:none;
}
.foot-links a:hover{color:var(--blue)}
.foot-mail{font-family:var(--mono);font-size:12px;letter-spacing:.08em}
.foot-note{
  margin-top:22px;padding-top:14px;border-top:1px solid var(--rule);
  font-family:var(--mono);font-size:11px;line-height:1.8;
  letter-spacing:.06em;color:var(--muted);
}

/* ---------- páginas de texto ---------- */

.page{padding:64px 0 var(--step)}
.page h1{grid-column:3 / 12;font-size:clamp(24px,3.2vw,36px)}
.page-lead{grid-column:3 / 10;margin:24px 0 0;color:var(--muted)}
.doc{grid-column:3 / 10}
.doc h2{margin-top:44px}
.doc h2:first-child{margin-top:0}
.doc .tick-row{margin:26px 0}
.rail--sticky{position:sticky;top:24px;align-self:start}

/* ---------- adaptación ---------- */

@media (max-width:900px){
  :root{--step:48px}
  body{font-size:16.5px}
  .grid{grid-template-columns:1fr;column-gap:0}
  .grid > *{grid-column:1 / -1 !important}
  .rail{display:flex;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}
  .rail b{display:inline-block}
  .rail span{display:inline-block}
  .rail .scale{width:72px;height:12px;margin:0;
    background-image:repeating-linear-gradient(to right,currentColor 0 1px,transparent 1px 11px)}
  .rail--sticky{position:static}
  .list--cols{columns:1}
  .figure-wide .cap{margin-top:12px;padding-bottom:0}
  .figure-wide{display:flex;flex-direction:column}
  .figure-tall{margin-bottom:28px}
  .hero{padding:48px 0 var(--step)}
  .nav a{margin-right:16px}
}

.foot-brand,.foot-mail{margin:0}