/* Gribeve — hoja de estilo común */

:root{
  --bg:#f7f2e2;
  --bg-alt:#ede5cd;
  --bg-dark:#17191a;
  --ink:#1b1a16;
  --ink-soft:#756f5c;
  --ink-light:#f7f2e2;
  --accent:#1f7d78;
  --accent2:#a8721c;
  --rule:#1b1a16;
  --gap:24px;
}

*{box-sizing:border-box;}

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

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

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

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;}

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

/* ---------- estructura de rejilla ---------- */

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

.cells{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  border-top:1px solid var(--rule);
  border-left:1px solid var(--rule);
}

.cell{
  border-right:1px solid var(--rule);
  border-bottom:1px solid var(--rule);
  padding:22px 20px;
  min-width:0;
}

.c3{grid-column:span 3;}
.c4{grid-column:span 4;}
.c5{grid-column:span 5;}
.c6{grid-column:span 6;}
.c7{grid-column:span 7;}
.c8{grid-column:span 8;}
.c9{grid-column:span 9;}
.c12{grid-column:span 12;}

.cell--empty{background:
  repeating-linear-gradient(135deg,transparent 0 9px,rgba(117,111,92,.28) 9px 10px);}

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

.site-head{
  border-bottom:2px solid var(--rule);
  background:var(--bg);
}

.site-head .wrap{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:12px 28px;
  padding-top:18px;
  padding-bottom:16px;
}

.brand{
  font-size:1.35rem;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--ink);
  text-decoration:none;
}
.brand span{
  display:block;
  font-size:.75rem;
  font-weight:400;
  letter-spacing:.01em;
  color:var(--ink-soft);
}

.site-nav ul{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap:6px 22px;
  margin:0;
  padding:0;
}
.site-nav a{
  color:var(--ink);
  text-decoration:none;
  font-size:.95rem;
  padding-bottom:2px;
  border-bottom:1px solid transparent;
}
.site-nav a:hover{border-bottom-color:var(--accent);}
.site-nav a[aria-current="page"]{border-bottom:2px solid var(--accent);font-weight:700;}

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

.hero{padding:58px 0 0;}

.hero-rule{border-top:2px solid var(--rule);}
.hero-rule--thin{border-top:1px solid var(--accent2);margin-top:6px;}

h1{
  font-size:clamp(2.3rem,6.2vw,4.3rem);
  line-height:1.03;
  letter-spacing:-.035em;
  font-weight:800;
  margin:26px 0 28px;
  max-width:none;
}
.hero h1{
  grid-column:span 9;
  padding-right:16px;
}

.hero-cells .lead{margin:0;}
.hero-cells .lead + .lead{margin-top:14px;}

.topic-list{
  list-style:none;
  margin:0;
  padding:0;
  font-size:.95rem;
}
.topic-list li{
  position:relative;
  padding-left:20px;
  margin-bottom:8px;
}
.topic-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:.62em;
  width:8px;
  height:8px;
  background:var(--accent);
}

/* ---------- separadores de hilo ---------- */

.thread{
  position:relative;
  border-top:2px solid var(--accent);
  margin:72px 0;
}
.thread::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:6px;
  border-top:1px solid var(--accent2);
}

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

section{min-width:0;}

h2{
  font-size:clamp(1.45rem,2.7vw,2rem);
  line-height:1.2;
  letter-spacing:-.02em;
  font-weight:700;
  margin:0 0 18px;
  max-width:24ch;
}

h3{
  font-size:1.1rem;
  font-weight:700;
  letter-spacing:-.01em;
  margin:26px 0 10px;
}

p{margin:0 0 16px;max-width:72ch;}

.num{
  display:block;
  font-size:.8rem;
  letter-spacing:.06em;
  color:var(--accent2);
  margin-bottom:10px;
}

.band{
  background:var(--bg-alt);
  padding:56px 0;
  margin:0;
}

.caption{
  font-size:13px;
  line-height:1.5;
  color:var(--ink-soft);
  margin:0;
}

/* ---------- figura principal ---------- */

.figure-grid{align-items:start;}

.frame{
  border:1px solid var(--rule);
  padding:10px;
  grid-column:span 6;
}
.frame img{width:100%;}

.figure-note{
  grid-column:span 5;
  grid-column-start:8;
  padding-top:4px;
}
.figure-note .caption{border-left:1px solid var(--accent2);padding-left:14px;}

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

.checklist{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  border-top:1px solid var(--rule);
  border-left:1px solid var(--rule);
  list-style:none;
  margin:26px 0 0;
  padding:0;
}
.checklist li{
  border-right:1px solid var(--rule);
  border-bottom:1px solid var(--rule);
  padding:16px 18px 16px 40px;
  position:relative;
  font-size:.97rem;
}
.checklist li::before{
  content:"";
  position:absolute;
  left:18px;
  top:1.42em;
  width:9px;
  height:9px;
  border:1px solid var(--accent);
  background:var(--bg);
}
.band .checklist li::before{background:var(--bg-alt);}

.plain-list{padding-left:20px;margin:0 0 16px;}
.plain-list li{margin-bottom:8px;max-width:70ch;}
.plain-list li::marker{color:var(--accent);}

/* ---------- sección oscura ---------- */

.dark{
  background:var(--bg-dark);
  color:var(--ink-light);
  padding:66px 0;
}
.dark h2{color:var(--ink-light);}
.dark p{color:#ddd7c4;}
.dark .num{color:var(--accent2);}
.dark a{color:#8fd0cb;}
.dark .caption{color:#a49d88;}
.dark .checklist,
.dark .checklist li{border-color:#3b3d3e;}
.dark .checklist li::before{background:var(--bg-dark);border-color:#8fd0cb;}

.dark-grid{gap:0 32px;align-items:start;}
.dark-figure{grid-column:1 / span 4;}
.dark-figure img{width:100%;border:1px solid #3b3d3e;}
.dark-figure .caption{margin-top:10px;}
.dark-text{grid-column:6 / span 7;}

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

.contact-cells .cell p:last-child{margin-bottom:0;}

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

.page-head{padding:52px 0 0;}
.page-head .hero-rule + h1{margin-bottom:18px;}
.page-head .intro{max-width:66ch;color:var(--ink-soft);}

.about-grid{
  display:grid;
  grid-template-columns:3fr 9fr;
  gap:0 34px;
  margin-top:8px;
}
.about-marks{
  list-style:none;
  margin:0;
  padding:0 34px 0 0;
  border-right:1px solid var(--rule);
  font-size:.93rem;
  line-height:1.5;
  color:var(--ink-soft);
}
.about-marks li{
  position:relative;
  padding-left:18px;
  margin-bottom:16px;
}
.about-marks li::before{
  content:"";
  position:absolute;
  left:0;
  top:.5em;
  width:8px;
  height:8px;
  background:var(--accent2);
}
.about-body h2:not(:first-child){margin-top:34px;}

.legal{max-width:74ch;padding-bottom:10px;}
.legal h2{margin-top:38px;}
.legal h2:first-of-type{margin-top:10px;}

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

.site-foot{
  margin-top:78px;
  border-top:2px solid var(--accent);
  background:var(--bg);
}
.foot-cells{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  border-left:1px solid var(--rule);
  border-bottom:1px solid var(--rule);
  margin:22px 0 40px;
}
.foot-cells > div{
  border-right:1px solid var(--rule);
  border-top:1px solid var(--rule);
  padding:20px 18px;
  font-size:.93rem;
  min-width:0;
}
.foot-cells h2{
  font-size:1.05rem;
  margin:0 0 8px;
  letter-spacing:-.01em;
}
.foot-cells p{margin:0;color:var(--ink-soft);}
.foot-cells ul{list-style:none;margin:0;padding:0;}
.foot-cells li{margin-bottom:5px;}
.foot-cells a{color:var(--accent);}
.foot-label{
  display:block;
  font-size:.78rem;
  letter-spacing:.06em;
  color:var(--accent2);
  margin-bottom:8px;
}

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

@media (max-width:900px){
  .hero h1{grid-column:span 12;padding-right:0;}
  .c3,.c4,.c5,.c6,.c7,.c8,.c9{grid-column:span 12;}
  .frame{grid-column:span 12;}
  .figure-note{grid-column:span 12;grid-column-start:auto;padding-top:16px;}
  .dark-figure,.dark-text{grid-column:span 12;}
  .dark-text{margin-top:26px;}
  .about-grid{grid-template-columns:1fr;gap:0;}
  .about-marks{
    border-right:0;
    border-bottom:1px solid var(--rule);
    padding:0 0 18px;
    margin-bottom:26px;
  }
  .foot-cells{grid-template-columns:1fr;}
}

@media (max-width:640px){
  body{font-size:16px;}
  .wrap{padding:0 16px;}
  .hero{padding-top:36px;}
  .thread{margin:44px 0;}
  .band{padding:38px 0;}
  .dark{padding:44px 0;}
  .checklist{grid-template-columns:1fr;}
  .cell{padding:18px 16px;}
  .site-head .wrap{flex-direction:column;align-items:flex-start;}
  .site-nav ul{gap:4px 16px;}
  h2{max-width:none;}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}