/* Provantarvo — hoja de estilo común */

:root {
  --paper: #f0f2e9;
  --paper-alt: #e3e7da;
  --paper-deep: #d7dcca;
  --ink: #1e2119;
  --ink-soft: #6c7264;
  --dark: #2b1d1e;
  --on-dark: #f0f2e9;
  --accent: #8c2f2c;
  --ochre: #8a6f1e;
  --mono: ui-monospace, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --gap: 24px;
  --pad-y: 88px;
  --pad-x: 52px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  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; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.on-dark :focus-visible { outline-color: var(--paper); }

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

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gap);
  max-width: 1320px;
  margin: 0 auto;
}

/* ---------- capas del encabezado ---------- */

.layer { padding: 0 var(--pad-x); }

.layer--nav { background: var(--paper-alt); padding-top: 18px; padding-bottom: 18px; }
.layer--title { background: var(--paper); padding-top: 96px; padding-bottom: 40px; }
.layer--lead { background: var(--paper-deep); padding-top: 56px; padding-bottom: 64px; }

.brand {
  grid-column: 1 / 4;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  align-self: center;
}
.brand:hover { color: var(--accent); }

.nav {
  grid-column: 4 / 13;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  justify-content: flex-end;
  align-items: center;
}

.nav a {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--ink); border-bottom-color: var(--accent); }
.nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }

h1 {
  grid-column: 1 / 11;
  margin: 0;
  font-family: var(--mono);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.035em;
  line-height: 1.14;
  font-size: clamp(26px, 4.1vw, 46px);
}

.lead {
  grid-column: 1 / 7;
  margin: 0;
  font-size: 18px;
}

.topics {
  grid-column: 8 / 13;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}
.topics li {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 7px 0 7px 20px;
  position: relative;
}
.topics li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 10px;
  height: 2px;
  background: var(--ochre);
}

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

.sec { padding: var(--pad-y) var(--pad-x); }
.sec--a { background: var(--paper); }
.sec--b { background: var(--paper-alt); }
.sec--dark { background: var(--dark); color: var(--on-dark); }

.block { grid-column: 1 / 7; }
.i1 .block { grid-column: 2 / 8; }
.i2 .block { grid-column: 3 / 9; }
.i3 .block { grid-column: 4 / 10; }

.sec h2 {
  margin: 0 0 22px;
  font-family: var(--mono);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  line-height: 1.25;
  font-size: clamp(19px, 2.2vw, 25px);
}

.sec h3 {
  margin: 34px 0 12px;
  font-family: var(--mono);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 14.5px;
  color: var(--ink);
}
.sec--dark h3 { color: var(--on-dark); }

.num {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--ochre);
  margin-bottom: 10px;
}

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

.list { margin: 0 0 18px; padding: 0 0 0 20px; }
.list li { margin-bottom: 9px; }
.list li::marker { color: var(--accent); }

.check { margin: 0; padding: 0; list-style: none; }
.check li {
  position: relative;
  padding: 10px 0 10px 26px;
  border-top: 1px solid rgba(108, 114, 100, 0.28);
}
.check li:first-child { border-top: none; }
.check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 21px;
  width: 12px;
  height: 2px;
  background: var(--accent);
}

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

.figure-main {
  grid-column: 4 / 13;
  margin: 0;
}
.figure-main img { width: 100%; }

figcaption {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-soft);
  max-width: 46ch;
}

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

.sec--dark .figure-detail {
  grid-column: 9 / 13;
  margin: 0;
}
.sec--dark .figure-detail img { width: 100%; }
.sec--dark figcaption { color: #b9b19c; }
.sec--dark .block { grid-column: 2 / 8; }
.sec--dark .num { color: #c0a352; }
.sec--dark .check li { border-top-color: rgba(240, 242, 233, 0.22); }
.sec--dark .check li::before { background: #c0a352; }
.sec--dark .list li::marker { color: #c0a352; }
.sec--dark a { color: var(--on-dark); }

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

.mail {
  font-family: var(--mono);
  font-size: 15px;
  letter-spacing: 0.04em;
}

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

.footer {
  background: var(--dark);
  color: var(--on-dark);
  padding: 64px var(--pad-x) 52px;
  margin: 0;
}

.footer-name {
  grid-column: 1 / 13;
  margin: 0 0 48px;
  font-family: var(--mono);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: 1;
  font-size: clamp(34px, 9vw, 118px);
  color: var(--on-dark);
}

.footer-col { grid-column: span 4; }

.footer-col h2 {
  margin: 0 0 14px;
  padding-top: 14px;
  border-top: 2px solid var(--ochre);
  font-family: var(--mono);
  font-weight: 600;
  font-size: 11.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #b9b19c;
}

.footer-col ul { margin: 0; padding: 0; list-style: none; }
.footer-col li { margin-bottom: 7px; }
.footer-col a { color: var(--on-dark); text-decoration: none; border-bottom: 1px solid rgba(240, 242, 233, 0.45); }
.footer-col a:hover { border-bottom-color: var(--on-dark); }
.footer-col p { margin: 0; font-size: 15px; color: #cdd1c4; }

.footer-note {
  grid-column: 1 / 13;
  margin: 44px 0 0;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #8e8778;
}

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

.page-head {
  background: var(--paper);
  padding: 84px var(--pad-x) 48px;
}
.page-head .lead { grid-column: 1 / 8; margin-top: 24px; }

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

@media (max-width: 1000px) {
  :root { --pad-y: 64px; --pad-x: 36px; --gap: 18px; }
  .figure-main { grid-column: 3 / 13; }
  .sec--dark .figure-detail { grid-column: 8 / 13; }
  .sec--dark .block { grid-column: 1 / 8; }
  .block, .i1 .block, .i2 .block, .i3 .block { grid-column: 1 / 9; }
  .lead { grid-column: 1 / 9; }
  .topics { grid-column: 1 / 9; margin-top: 30px; }
  h1 { grid-column: 1 / 13; }
  .page-head .lead { grid-column: 1 / 10; }
}

@media (max-width: 720px) {
  :root { --pad-y: 52px; --pad-x: 20px; }
  body { font-size: 16.5px; }
  .grid { display: block; }
  .layer--title { padding-top: 60px; }
  .brand { display: block; margin-bottom: 14px; }
  .nav { justify-content: flex-start; gap: 6px 20px; }
  .figure-main, .sec--dark .figure-detail { margin: 0 0 28px; }
  .sec--dark .figure-detail { margin: 28px 0 0; }
  .topics { margin-top: 26px; }
  .footer-name { margin-bottom: 36px; }
  .footer-col { margin-bottom: 32px; }
  .footer-col:last-of-type { margin-bottom: 0; }
}