:root{
  --field:#dde3e7;
  --sheet:#eceff1;
  --band:#dde3e7;
  --dark:#1f2a33;
  --ink:#151c22;
  --ink-2:#606d78;
  --on-dark:#eceff1;
  --accent:#a2472c;
  --accent-2:#3f6b86;
  --line:#c2ccd3;
  --serif:Georgia,'Times New Roman',serif;
  --sans:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
}

*{box-sizing:border-box;}

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

body{
  margin:0;
  background:var(--field);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.8;
  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:2px solid var(--accent);outline-offset:3px;}

/* ---------- hoja / sheet ---------- */

.sheet{
  max-width:1180px;
  margin:40px auto;
  background:var(--sheet);
  border:1px solid var(--accent);
  padding:0 0 72px;
}

.pad{padding-left:clamp(18px,4vw,56px);padding-right:clamp(18px,4vw,56px);}

.grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  column-gap:28px;
  row-gap:28px;
}

/* ---------- navegación ---------- */

.topbar{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:12px 28px;
  padding-top:26px;
  padding-bottom:20px;
  border-bottom:1px solid var(--line);
}

.mark{
  font-family:var(--serif);
  font-size:21px;
  letter-spacing:.06em;
  line-height:1.2;
  color:var(--ink);
  text-decoration:none;
}
.mark span{display:block;font-family:var(--sans);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-2);}

.topnav ul{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap:8px 22px;
  margin:0;
  padding:0;
}
.topnav a{
  font-size:13px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--ink-2);
  text-decoration:none;
  padding-bottom:2px;
  border-bottom:1px solid transparent;
}
.topnav a:hover{color:var(--ink);border-bottom-color:var(--accent);}
.topnav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--accent);}

/* ---------- ritmo de secciones ---------- */

.flow > * + *{margin-top:88px;}

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

.hero{padding-top:56px;}

.hero h1{
  grid-column:1 / 9;
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(34px,5vw,58px);
  line-height:1.1;
  letter-spacing:-.01em;
  margin:0;
}

.hero .standfirst{grid-column:1 / 9;margin:0;max-width:60ch;}

.specbox{
  grid-column:9 / 13;
  border:1px solid var(--line);
  padding:16px 18px;
  background:transparent;
  align-self:start;
}
.specbox h2,.specbox h3{
  font-family:var(--sans);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--accent-2);
  margin:0 0 10px;
  font-weight:600;
}
.specbox dl{margin:0;font-size:13px;line-height:1.6;}
.specbox dt{color:var(--ink-2);font-size:11px;letter-spacing:.1em;text-transform:uppercase;}
.specbox dd{margin:0 0 12px;color:var(--ink);}
.specbox dd:last-child{margin-bottom:0;}
.specbox ul{margin:0;padding-left:16px;font-size:13px;line-height:1.65;}

/* ---------- lámina principal ---------- */

.plate{
  margin:0;
  display:grid;
  grid-template-columns:repeat(12,1fr);
  column-gap:28px;
  align-items:end;
}
.plate img{
  grid-column:1 / 6;
  border:1px solid var(--line);
}
.plate figcaption{
  grid-column:7 / 11;
  font-size:12px;
  line-height:1.7;
  color:var(--ink-2);
  border-top:1px solid var(--accent-2);
  padding-top:10px;
}

/* ---------- secciones de texto ---------- */

.band{background:var(--band);padding-top:64px;padding-bottom:64px;}

h2{
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(23px,2.4vw,29px);
  line-height:1.25;
  margin:0 0 18px;
}
h3{
  font-family:var(--serif);
  font-weight:400;
  font-size:19px;
  line-height:1.35;
  margin:30px 0 10px;
}

.num{
  display:block;
  font-family:var(--sans);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--accent-2);
  margin-bottom:8px;
}

.col-text{grid-column:1 / 8;}
.col-side{grid-column:9 / 13;align-self:start;}

.col-text p{margin:0 0 18px;}
.col-text p:last-child{margin-bottom:0;}

.col-text ul,.col-text ol{margin:0 0 18px;padding-left:20px;}
.col-text li{margin-bottom:8px;}
.col-text li::marker{color:var(--accent);}

.wide{grid-column:1 / 13;}

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

.rule{
  position:relative;
  height:1px;
  background:var(--line);
  margin-left:clamp(18px,4vw,56px);
  margin-right:clamp(18px,4vw,56px);
}
.rule::before,.rule::after{
  content:"";
  position:absolute;
  top:-6px;
  width:1px;
  height:13px;
  background:var(--accent-2);
}
.rule::before{left:0;}
.rule::after{right:0;}

.rule-aside{display:grid;grid-template-columns:repeat(12,1fr);column-gap:28px;}
.rule-aside .specbox{grid-column:9 / 13;}

/* ---------- sección contrastada ---------- */

.dark{
  background:var(--dark);
  color:var(--on-dark);
  padding-top:72px;
  padding-bottom:72px;
}
.dark h2,.dark h3{color:var(--on-dark);}
.dark .num{color:#8fb0c4;}
.dark a{color:#e0a892;}
.dark li::marker{color:#e0a892;}
.dark .dark-text{grid-column:1 / 7;}
.dark .dark-plate{grid-column:8 / 13;margin:0;}
.dark .dark-plate img{border:1px solid rgba(236,239,241,.35);width:100%;}
.dark .dark-plate figcaption{
  font-size:12px;
  line-height:1.7;
  color:#9fb1bd;
  margin-top:10px;
}
.dark .specbox{border-color:rgba(236,239,241,.3);}
.dark .specbox h3{color:#8fb0c4;}
.dark .specbox dt{color:#9fb1bd;}
.dark .specbox dd{color:var(--on-dark);}

/* ---------- listas de comprobación ---------- */

.check{list-style:none;padding-left:0;}
.check li{
  padding-left:22px;
  position:relative;
  margin-bottom:10px;
}
.check li::before{
  content:"";
  position:absolute;
  left:0;
  top:.75em;
  width:9px;
  height:1px;
  background:var(--accent);
}

.lead{font-size:19px;line-height:1.7;}

.small{font-size:13px;line-height:1.7;color:var(--ink-2);}

/* ---------- About ---------- */

.stack{display:flex;flex-direction:column;gap:20px;}

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

.sitefoot{
  max-width:1180px;
  margin:0 auto 48px;
  padding:0 clamp(18px,4vw,56px);
}
.foot-top{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 24px;
  align-items:baseline;
  padding-bottom:14px;
}
.foot-name{font-family:var(--serif);font-size:20px;letter-spacing:.06em;}
.foot-line{height:1px;background:var(--line);}
.foot-bottom{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  column-gap:28px;
  row-gap:16px;
  padding-top:16px;
}
.foot-bottom nav{grid-column:1 / 8;}
.foot-bottom ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px 20px;}
.foot-bottom a{font-size:13px;letter-spacing:.06em;color:var(--ink-2);text-decoration:none;border-bottom:1px solid transparent;}
.foot-bottom a:hover{color:var(--ink);border-bottom-color:var(--accent);}
.foot-note{grid-column:9 / 13;font-size:12px;line-height:1.7;color:var(--ink-2);margin:0;}

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

@media (max-width:900px){
  .sheet{margin:24px 16px;padding-bottom:52px;}
  .flow > * + *{margin-top:52px;}
  .grid,.plate,.rule-aside,.dark .grid,.foot-bottom{grid-template-columns:1fr;}
  .hero h1,.hero .standfirst,.specbox,.col-text,.col-side,.wide,
  .plate img,.plate figcaption,.rule-aside .specbox,
  .dark .dark-text,.dark .dark-plate,
  .foot-bottom nav,.foot-note{grid-column:1 / -1;}
  .plate img{max-width:420px;}
  .dark .dark-plate img{max-width:420px;}
  .hero{padding-top:36px;}
  .band{padding-top:44px;padding-bottom:44px;}
  .dark{padding-top:48px;padding-bottom:48px;}
  .rule{margin-left:16px;margin-right:16px;}
}

@media (max-width:520px){
  body{font-size:16px;}
  .topnav ul{gap:6px 16px;}
}