/* Trorodo — hoja de estilos común */

:root{
  --ivory:#f6f0e6;
  --sand:#eadcc6;
  --chestnut:#4a2b1b;
  --ink:#2c1f15;
  --muted:#7c6a55;
  --amber:#a9631d;
  --amber-light:#c98f52;
  --indigo:#2a3f63;
  --indigo-light:#8fa2c4;
  --serif:Georgia,'Times New Roman',serif;
  --sans:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --step:84px;
  --gap:26px;
}

*{box-sizing:border-box}

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

body{
  margin:0;
  background:var(--ivory);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.8;
}

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

a{color:var(--amber)}
a:focus-visible,button:focus-visible{outline:2px solid var(--amber);outline-offset:3px}
.band--dark a:focus-visible,.footer a:focus-visible{outline-color:var(--ivory)}

/* ---------- retícula ---------- */

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 28px}
.g{display:grid;grid-template-columns:repeat(12,1fr);column-gap:var(--gap)}

.col-1{grid-column:1 / 8}
.col-2{grid-column:2 / 9}
.col-3{grid-column:3 / 10}
.col-4{grid-column:4 / 11}

/* ---------- cruces de registro ---------- */

.frame{position:relative}

.rm{
  position:absolute;
  width:20px;height:20px;
  border-radius:50%;
  box-shadow:inset 0 0 0 1px var(--indigo);
  pointer-events:none;
}
.rm::before,.rm::after{content:"";position:absolute;background:var(--amber)}
.rm::before{left:50%;top:-7px;width:1px;height:34px;transform:translateX(-50%)}
.rm::after{top:50%;left:-7px;height:1px;width:34px;transform:translateY(-50%)}

.frame > .rm-tl{top:-10px;left:-10px}
.frame > .rm-tr{top:-10px;right:-10px}
.frame > .rm-bl{bottom:-10px;left:-10px}
.frame > .rm-br{bottom:-10px;right:-10px}

.rm--pale{box-shadow:inset 0 0 0 1px var(--indigo-light)}
.rm--pale::before,.rm--pale::after{background:var(--amber-light)}

/* ---------- separadores ---------- */

.rule{position:relative;height:10px;margin:0 0 30px}
.rule::before,.rule::after{content:"";position:absolute;left:0;height:2px}
.rule::before{top:0;width:100%;background:var(--amber)}
.rule::after{top:6px;left:24px;width:calc(100% - 24px);background:var(--indigo)}
.rule--pale::before{background:var(--amber-light)}
.rule--pale::after{background:var(--indigo-light)}

/* ---------- cabecera y navegación ---------- */

.topbar{background:var(--ivory);border-bottom:1px solid rgba(124,106,85,.35)}
.topbar-in{
  display:flex;flex-wrap:wrap;align-items:baseline;
  justify-content:space-between;gap:10px 26px;
  padding:22px 0 18px;
}
.brand{
  font-family:var(--serif);font-size:23px;letter-spacing:.03em;
  color:var(--ink);text-decoration:none;
}
.brand:hover{color:var(--amber)}
.nav ul{list-style:none;display:flex;flex-wrap:wrap;gap:6px 22px;margin:0;padding:0}
.nav a{
  font-size:14px;color:var(--ink);text-decoration:none;
  padding-bottom:3px;border-bottom:1px solid transparent;
}
.nav a:hover{border-bottom-color:var(--amber)}
.nav a[aria-current="page"]{border-bottom-color:var(--amber);color:var(--amber)}

/* ---------- bandas ---------- */

.band{padding:var(--step) 0}
.band--alt{background:var(--sand)}
.band--dark{background:var(--chestnut);color:var(--ivory)}
.band--dark .lead,.band--dark p{color:var(--ivory)}
.band--dark a{color:#e0a86a}

/* ---------- hero ---------- */

.hero{padding:calc(var(--step) - 20px) 0 var(--step)}
.hero-frame{padding:46px 0 40px}

.hero-title{
  grid-column:1 / 10;
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(2.05rem,5.4vw,4.2rem);
  line-height:1.08;
  letter-spacing:-.015em;
  margin:0 0 34px;
}
.hero-title span{display:block}
.hero-title .l2{position:relative}
.hero-title .l2::after{
  content:"";position:absolute;left:-8px;right:16%;bottom:.2em;
  height:2px;background:var(--amber);
}

.hero-lead{grid-column:1 / 6;margin:0;font-size:18px}
.hero-lead + .hero-lead{margin-top:18px}

.hero-topics{grid-column:8 / 13;margin:6px 0 0;padding:0;list-style:none}
.hero-topics li{
  position:relative;padding-left:20px;
  font-size:15px;line-height:1.6;margin-bottom:11px;color:var(--muted);
}
.hero-topics li::before{
  content:"";position:absolute;left:0;top:.6em;
  width:7px;height:7px;background:var(--amber);
}

/* ---------- tipografía de contenido ---------- */

h2{
  font-family:var(--serif);font-weight:400;
  font-size:clamp(1.35rem,2.3vw,1.75rem);
  line-height:1.25;margin:0 0 18px;letter-spacing:-.005em;
}
h3{
  font-family:var(--serif);font-weight:400;
  font-size:1.06rem;line-height:1.4;margin:30px 0 10px;
}
p{margin:0 0 18px}
p:last-child{margin-bottom:0}

.num{
  display:block;font-family:var(--serif);font-size:12px;
  letter-spacing:.16em;color:var(--indigo);margin-bottom:10px;
}
.band--dark .num{color:var(--indigo-light)}

.lead{font-size:18px}
.muted{color:var(--muted)}

ul.plain,ol.plain{margin:0 0 18px;padding-left:0;list-style:none}
ul.plain li{position:relative;padding-left:22px;margin-bottom:10px}
ul.plain li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:7px;height:7px;background:var(--amber);
}
ol.plain{counter-reset:paso}
ol.plain li{position:relative;padding-left:30px;margin-bottom:10px;counter-increment:paso}
ol.plain li::before{
  content:counter(paso,decimal-leading-zero);
  position:absolute;left:0;top:.1em;
  font-family:var(--serif);font-size:13px;color:var(--indigo);
}
.band--dark ul.plain li::before{background:var(--amber-light)}
.band--dark ol.plain li::before{color:var(--indigo-light)}

/* ---------- imagen principal ---------- */

.figure-main{grid-column:3 / 11;margin:0}
.imgframe{display:block}
figcaption{
  font-size:12px;line-height:1.6;color:var(--muted);
  margin-top:16px;max-width:46ch;
}
.band--dark figcaption{color:#c9b69c}

/* ---------- sección oscura con detalle ---------- */

.dark-img{grid-column:2 / 7;margin:0}
.dark-txt{grid-column:8 / 13}

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

.mail{
  font-family:var(--serif);font-size:20px;
  color:var(--amber);text-decoration:none;
  border-bottom:1px solid var(--amber);
}
.band--dark .mail,.footer .mail{color:#e0a86a;border-bottom-color:#e0a86a}

/* ---------- páginas interiores ---------- */

.page-head{padding:calc(var(--step) - 24px) 0 0}
.page-title{
  grid-column:2 / 11;
  font-family:var(--serif);font-weight:400;
  font-size:clamp(1.9rem,4.2vw,3.1rem);
  line-height:1.12;letter-spacing:-.015em;margin:0 0 24px;
}
.page-intro{grid-column:2 / 9;margin:0;font-size:18px;color:var(--muted)}

.doc{padding:calc(var(--step) - 10px) 0 var(--step)}
.doc-marks{grid-column:1 / 2;position:relative}
.doc-marks .rm{position:relative;display:block;margin:0 0 92px}
.doc-body{grid-column:3 / 10}
.doc-body section{margin-bottom:48px}
.doc-body section:last-child{margin-bottom:0}

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

.footer{background:var(--chestnut);color:var(--ivory);padding:calc(var(--step) - 20px) 0}
.footer .rule{margin-bottom:34px}
.f-a{grid-column:1 / 8}
.f-b{grid-column:8 / 13}
.f-name{font-family:var(--serif);font-size:22px;letter-spacing:.03em;margin:0 0 14px}
.f-note{font-size:14px;line-height:1.7;color:#d8c8b2;margin:0;max-width:46ch}
.f-nav{list-style:none;margin:0 0 18px;padding:0}
.f-nav li{margin-bottom:8px}
.f-nav a{color:var(--ivory);text-decoration:none;font-size:14px;border-bottom:1px solid transparent}
.f-nav a:hover{border-bottom-color:#e0a86a}
.f-mail{font-size:14px;margin:0 0 14px}
.f-mail a{color:#e0a86a}
.f-legal{font-size:12px;color:#b9a68e;margin:26px 0 0}

/* ---------- tablet ---------- */

@media (max-width:1040px){
  .col-1,.col-2,.col-3,.col-4{grid-column:1 / 11}
  .hero-title{grid-column:1 / 12}
  .hero-lead{grid-column:1 / 7}
  .hero-topics{grid-column:8 / 13}
  .figure-main{grid-column:2 / 12}
  .dark-img{grid-column:1 / 6}
  .dark-txt{grid-column:7 / 13}
  .page-title,.page-intro{grid-column:1 / 12}
  .doc-body{grid-column:2 / 12}
}

/* ---------- móvil ---------- */

@media (max-width:760px){
  :root{--step:50px;--gap:0px}
  body{font-size:16.5px}
  .wrap{padding:0 20px}
  .hero-frame{padding:34px 0 30px}
  .col-1,.col-2,.col-3,.col-4,
  .hero-title,.hero-lead,.hero-topics,
  .figure-main,.dark-img,.dark-txt,
  .page-title,.page-intro,.doc-body,
  .f-a,.f-b{grid-column:1 / -1}
  .hero-topics{margin-top:26px}
  .dark-txt{margin-top:30px}
  .doc-marks{display:none}
  .f-b{margin-top:34px}
  .rule::after{left:16px;width:calc(100% - 16px)}
  .hero-title .l2::after{right:8%}
}