/* Fleterva — hoja de estilo común */

:root{
  --stone-1:#f7f3ea;
  --stone-2:#ece6d8;
  --stone-3:#e3dbc8;
  --pine:#1c2a22;
  --ink:#221f19;
  --ink-soft:#786f60;
  --accent:#2f5c44;
  --accent-2:#a8722c;
  --mono:ui-monospace,Consolas,"Liberation Mono",monospace;
  --sans:system-ui,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --pad-y:88px;
  --pad-x:52px;
  --gap:24px;
}

*{box-sizing:border-box;}

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

body{
  margin:0;
  background:var(--stone-1);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  overflow-x:hidden;
}

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

a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
a:hover{text-decoration-thickness:2px;}

a:focus-visible,
:focus-visible{
  outline:3px solid var(--accent);
  outline-offset:3px;
}

/* ---------- rejilla ---------- */

.layer{width:100%;}
.wrap{
  max-width:1320px;
  margin:0 auto;
  padding-left:var(--pad-x);
  padding-right:var(--pad-x);
}
.grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  column-gap:var(--gap);
}

.block{grid-column:1 / span 6;}
.step-0 .block{grid-column:1 / span 6;}
.step-1 .block{grid-column:2 / span 6;}
.step-2 .block{grid-column:3 / span 6;}
.step-3 .block{grid-column:4 / span 6;}

/* ---------- tipografía ---------- */

h1,h2,h3,.label,.nav a,.caption,.footer-name{
  font-family:var(--mono);
  text-transform:uppercase;
}

h1{
  font-size:clamp(2rem,4.8vw,3.4rem);
  line-height:1.1;
  letter-spacing:.04em;
  font-weight:600;
  margin:0;
  max-width:16ch;
}

h2{
  font-size:clamp(1.05rem,1.7vw,1.35rem);
  letter-spacing:.11em;
  line-height:1.45;
  font-weight:600;
  margin:0 0 22px;
}

h3{
  font-size:.92rem;
  letter-spacing:.1em;
  line-height:1.5;
  font-weight:600;
  color:var(--accent);
  margin:34px 0 12px;
}

p{margin:0 0 20px;max-width:62ch;}
p:last-child{margin-bottom:0;}

.label{
  display:block;
  font-size:.72rem;
  letter-spacing:.22em;
  color:var(--accent-2);
  margin:0 0 18px;
}

.caption{
  font-family:var(--mono);
  text-transform:none;
  font-size:.74rem;
  letter-spacing:.06em;
  line-height:1.6;
  color:var(--ink-soft);
  margin:14px 0 0;
  max-width:48ch;
}

.lead{font-size:1.06rem;}

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

ul,ol{margin:0 0 20px;padding-left:0;max-width:62ch;}
ul{list-style:none;}
ul li{
  position:relative;
  padding-left:26px;
  margin-bottom:11px;
}
ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:11px;
  height:2px;
  background:var(--accent);
}
ol{padding-left:22px;}
ol li{margin-bottom:11px;padding-left:6px;}
ol li::marker{font-family:var(--mono);color:var(--accent-2);font-size:.85em;}
li:last-child{margin-bottom:0;}

/* ---------- navegación (capa superior del hero) ---------- */

.nav-layer{background:var(--stone-2);}
.nav-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:14px 32px;
  padding-top:20px;
  padding-bottom:20px;
}
.brand{
  font-family:var(--mono);
  text-transform:uppercase;
  letter-spacing:.3em;
  font-size:.86rem;
  font-weight:600;
  color:var(--ink);
  text-decoration:none;
}
.brand:hover{color:var(--accent);}
.nav ul{display:flex;flex-wrap:wrap;gap:8px 26px;margin:0;max-width:none;}
.nav li{padding:0;margin:0;}
.nav li::before{display:none;}
.nav a{
  font-size:.72rem;
  letter-spacing:.16em;
  color:var(--ink-soft);
  text-decoration:none;
}
.nav a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:5px;}
.nav a[aria-current="page"]{color:var(--accent);}

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

.hero-mid{
  background:var(--stone-1);
  padding-top:128px;
  padding-bottom:40px;
}
.hero-mid .grid > div{grid-column:1 / span 10;}
.hero-mid .label{margin-bottom:26px;}

.hero-base{
  background:var(--stone-3);
  padding-top:52px;
  padding-bottom:52px;
}
.hero-base .intro{grid-column:1 / span 6;}
.hero-base .topics{grid-column:8 / span 5;}
.hero-base .topics .label{color:var(--ink-soft);}

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

.section{padding-top:var(--pad-y);padding-bottom:var(--pad-y);}
.tone-a{background:var(--stone-1);}
.tone-b{background:var(--stone-2);}
.tone-dark{background:var(--pine);color:var(--stone-1);}
.tone-dark h2{color:var(--stone-1);}
.tone-dark h3{color:#9fc3ad;}
.tone-dark .label{color:var(--accent-2);}
.tone-dark .caption{color:#b6ae9c;}
.tone-dark a{color:#9fc3ad;}
.tone-dark ul li::before{background:var(--accent-2);}

.sec-index{
  font-family:var(--mono);
  color:var(--accent-2);
  letter-spacing:.2em;
  font-size:.72rem;
}

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

.figure-main{
  margin:0;
  grid-column:4 / span 9;
}
.figure-main img{width:100%;}

.media-band{
  background:var(--stone-2);
  padding-top:52px;
  padding-bottom:52px;
}

/* ---------- sección oscura con imagen de detalle ---------- */

.dark-media{grid-column:1 / span 4;margin:0;}
.dark-text{grid-column:6 / span 6;}
.dark-media img{width:100%;}

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

.footer{
  background:var(--pine);
  color:var(--stone-1);
  padding-top:64px;
  padding-bottom:56px;
}
.footer-name{
  font-size:clamp(2.2rem,9vw,6.5rem);
  letter-spacing:.06em;
  line-height:1;
  font-weight:600;
  margin:0 0 48px;
  color:var(--stone-1);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  column-gap:var(--gap);
  row-gap:36px;
}
.footer-col{padding-top:16px;position:relative;}
.footer-col::before{
  content:"";
  position:absolute;
  top:0;left:0;
  width:46px;height:2px;
  background:var(--accent-2);
}
.footer-col h2{
  font-size:.72rem;
  letter-spacing:.2em;
  color:#b6ae9c;
  margin:0 0 14px;
}
.footer-col ul{margin:0;}
.footer-col li{padding-left:0;margin-bottom:8px;}
.footer-col li::before{display:none;}
.footer-col a{color:var(--stone-1);text-decoration:none;font-size:.95rem;}
.footer-col a:hover{text-decoration:underline;text-underline-offset:4px;color:#9fc3ad;}
.footer-col p{font-size:.92rem;color:#c8c0ae;margin:0;max-width:34ch;}

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

.page-head{
  background:var(--stone-1);
  padding-top:96px;
  padding-bottom:48px;
}
.page-head .grid > div{grid-column:1 / span 9;}
.page-head p{margin-top:24px;}

/* ---------- responsive ---------- */

@media (max-width:1040px){
  :root{--pad-y:64px;--pad-x:34px;--gap:20px;}
  .hero-mid{padding-top:88px;}
  .figure-main{grid-column:3 / span 10;}
  .dark-media{grid-column:1 / span 5;}
  .dark-text{grid-column:7 / span 6;}
  .hero-base .intro{grid-column:1 / span 7;}
  .hero-base .topics{grid-column:8 / span 5;}
}

@media (max-width:820px){
  .grid{display:block;}
  .block,
  .step-0 .block,.step-1 .block,.step-2 .block,.step-3 .block,
  .hero-mid .grid > div,
  .hero-base .intro,.hero-base .topics,
  .figure-main,.dark-media,.dark-text,
  .page-head .grid > div{grid-column:auto;}
  .hero-base .topics{margin-top:36px;}
  .dark-text{margin-top:32px;}
  .figure-main{max-width:100%;}
  h1{max-width:none;}
  .footer-cols{grid-template-columns:1fr;}
  .footer-name{margin-bottom:36px;}
}

@media (max-width:560px){
  :root{--pad-y:52px;--pad-x:20px;}
  body{font-size:16px;}
  .hero-mid{padding-top:64px;padding-bottom:32px;}
  .nav-inner{flex-direction:column;align-items:flex-start;}
  .nav ul{gap:8px 18px;}
  .footer{padding-top:48px;}
}