/* Trostakira — hoja de estilo común */

:root{
  --sand:#f2f0ea;
  --sand-alt:#e5e2d9;
  --ink:#1a1c22;
  --mute:#6e6b64;
  --red:#a82c26;
  --blue:#2a4a6b;
  --gap:24px;
  --step:40px;
}

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

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

body{
  margin:0;
  background:var(--sand);
  color:var(--ink);
  font-family:system-ui,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:17px;
  line-height:1.7;
  overflow-x:hidden;
}

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

a{color:var(--red);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(--red);
  outline-offset:3px;
}

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

.wrap{
  max-width:1240px;
  margin:0 auto;
  padding:0 24px;
}

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

/* ---------- columna de servicio (escala) ---------- */

.rail{
  grid-column:1 / 3;
  position:relative;
  padding-top:6px;
}

.rail .num{
  display:block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--blue);
}

.rail .tag{
  display:block;
  font-size:13px;
  line-height:1.45;
  color:var(--mute);
  margin-top:6px;
}

.rail .ticks{
  width:1px;
  min-height:72px;
  height:calc(100% - 90px);
  margin-top:16px;
  background-image:repeating-linear-gradient(to bottom,var(--blue) 0 24px,transparent 24px 44px);
}

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

.section{
  padding:var(--step) 0;
  border:0;
}

.section--alt{background:var(--sand-alt);}

.section--ink{
  background:var(--ink);
  color:var(--sand);
}

.section--ink .rail .num{color:#8fb0cf;}
.section--ink .rail .tag{color:#a9a69d;}
.section--ink .rail .ticks{background-image:repeating-linear-gradient(to bottom,#8fb0cf 0 24px,transparent 24px 44px);}
.section--ink h2{color:var(--sand);}
.section--ink .caption{color:#a9a69d;}

/* ---------- bloques de contenido ---------- */

.body-col{grid-column:3 / 10;}
.wide-col{grid-column:3 / 12;}

.lead{
  font-size:20px;
  line-height:1.6;
  max-width:44em;
}

h1{
  grid-column:3 / 9;
  margin:0 0 20px;
  font-size:clamp(38px,6.4vw,74px);
  line-height:1.03;
  letter-spacing:-.03em;
  font-weight:700;
}

h2{
  margin:0 0 16px;
  font-size:clamp(23px,2.6vw,31px);
  line-height:1.2;
  letter-spacing:-.015em;
  font-weight:700;
}

h3{
  margin:28px 0 8px;
  font-size:19px;
  line-height:1.35;
  font-weight:700;
}

p{margin:0 0 18px;max-width:40em;}
p:last-child{margin-bottom:0;}

.muted{color:var(--mute);}

.hr{
  height:24px;
  margin:26px 0;
  background-image:repeating-linear-gradient(to right,var(--mute) 0 1px,transparent 1px 14px);
  opacity:.7;
}

.hr--short{width:120px;margin:22px 0;}

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

.list{
  grid-column:3 / 12;
  margin:0;
  padding:0;
  list-style:none;
  columns:2;
  column-gap:48px;
}

.list li{
  break-inside:avoid;
  position:relative;
  padding-left:20px;
  margin:0 0 14px;
  max-width:34em;
}

.list li::before{
  content:"";
  position:absolute;
  left:0;
  top:.62em;
  width:10px;
  height:2px;
  background:var(--red);
}

.list--single{columns:1;}

.steps{
  grid-column:3 / 12;
  margin:0;
  padding:0;
  list-style:none;
  counter-reset:st;
}

.steps li{
  counter-increment:st;
  position:relative;
  padding-left:42px;
  margin:0 0 16px;
  max-width:40em;
}

.steps li::before{
  content:counter(st,decimal-leading-zero);
  position:absolute;
  left:0;
  top:0;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--blue);
  line-height:1.9;
}

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

.site-head{
  padding:20px 0 18px;
  border-bottom:1px solid rgba(26,28,34,.16);
}

.head-grid{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px 28px;
}

.brand{
  font-size:17px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--ink);
  text-decoration:none;
}
.brand:hover{text-decoration:none;color:var(--red);}

.site-nav ul{
  display:flex;
  flex-wrap:wrap;
  gap:6px 22px;
  margin:0;
  padding:0;
  list-style:none;
}

.site-nav a{
  font-size:15px;
  color:var(--ink);
  text-decoration:none;
  padding-bottom:2px;
  border-bottom:1px solid transparent;
}
.site-nav a:hover{border-bottom-color:var(--red);color:var(--red);}
.site-nav a[aria-current="page"]{border-bottom-color:var(--red);}

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

.hero{padding:64px 0 var(--step);}
.hero .lead{grid-column:3 / 9;}
.hero .rail{grid-column:1 / 3;}
.hero .rail .ticks{height:auto;min-height:180px;}

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

.band{padding:8px 0 var(--step);}

.band figure{
  grid-column:4 / 13;
  grid-row:1;
  margin:0;
}

.band .caption{
  grid-column:1 / 4;
  grid-row:1;
  align-self:end;
  padding-bottom:6px;
}

.caption{
  font-size:13px;
  line-height:1.5;
  color:var(--mute);
  margin:10px 0 0;
  max-width:30em;
}

.caption .seq{
  color:var(--blue);
  font-weight:700;
  letter-spacing:.14em;
  display:block;
}

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

.detail-fig{
  grid-column:2 / 6;
  margin:0;
}

.detail-text{grid-column:7 / 13;}
.detail-text p{max-width:34em;}

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

.mail{
  font-size:19px;
  font-weight:700;
  letter-spacing:.01em;
}

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

.site-foot{
  background:var(--sand-alt);
  padding:28px 0 34px;
  margin-top:var(--step);
}

.patch{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:14px 28px;
}

.patch .f-name{
  font-size:15px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
}

.patch nav ul{
  display:flex;
  flex-wrap:wrap;
  gap:6px 20px;
  margin:0;
  padding:0;
  list-style:none;
}

.patch nav a{
  font-size:14px;
  color:var(--ink);
  text-decoration:none;
  border-bottom:1px solid rgba(26,28,34,.28);
  padding-bottom:1px;
}
.patch nav a:hover{color:var(--red);border-bottom-color:var(--red);}

.patch .f-mail a{font-size:14px;}

.foot-rule{
  height:1px;
  background:rgba(26,28,34,.22);
  margin:18px 0 12px;
}

.foot-note{
  font-size:13px;
  line-height:1.6;
  color:var(--mute);
  margin:0;
  max-width:62em;
}

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

.page-head{padding:56px 0 var(--step);}
.page-head h1{
  grid-column:3 / 11;
  font-size:clamp(32px,4.6vw,52px);
}
.page-head .lead{grid-column:3 / 10;}

.legal .body-col h2{margin-top:0;}

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

@media (max-width:900px){
  .body-col,.wide-col,.list,.steps,h1,.hero .lead,.page-head h1,.page-head .lead{grid-column:2 / 13;}
  .band figure{grid-column:2 / 13;grid-row:1;}
  .band .caption{grid-column:2 / 13;grid-row:2;margin-top:10px;padding-bottom:0;}
  .detail-fig{grid-column:2 / 9;}
  .detail-text{grid-column:2 / 13;margin-top:22px;}
  .list{columns:1;}
}

@media (max-width:700px){
  :root{--step:24px;--gap:16px;}
  body{font-size:16px;}
  .wrap{padding:0 18px;}
  .grid{grid-template-columns:1fr;}
  .rail,.hero .rail{grid-column:auto;padding-top:0;margin-bottom:12px;}
  .rail .ticks{display:none;}
  .hero .rail .ticks{display:none;}
  .rail .num{display:inline;}
  .rail .tag{display:inline;margin-left:10px;}
  .body-col,.wide-col,.list,.steps,h1,.hero .lead,
  .page-head h1,.page-head .lead,
  .band figure,.band .caption,
  .detail-fig,.detail-text{grid-column:auto;}
  .band figure,.band .caption{grid-row:auto;}
  .band .caption{margin-top:10px;padding-bottom:0;}
  .hero{padding:36px 0 var(--step);}
  .page-head{padding:32px 0 var(--step);}
  .lead{font-size:18px;}
  .patch{flex-direction:column;align-items:flex-start;gap:12px;}
  .site-nav ul{gap:4px 16px;}
}