/* Krozevulmo — hoja de estilo general */

:root {
  --paper: #f5f4f0;
  --paper-alt: #e2ded4;
  --ink: #1c1e20;
  --ink-soft: #6a6d6e;
  --deep: #14456b;
  --accent: #c2522f;
  --accent-2: #1d6b8f;
  --rhythm: 76px;
  --gutter: 24px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  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(--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;
}

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

.wrap {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 22px;
}

.grid > * { min-width: 0; }

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

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

.topbar {
  border-bottom: 1px solid rgba(28, 30, 32, 0.18);
  background: var(--paper);
}

.topbar .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 26px;
  padding-top: 18px;
  padding-bottom: 18px;
}

.brand {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}

.brand:hover { color: var(--accent); }

.nav {
  margin-left: auto;
}

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

.nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 14.5px;
  letter-spacing: 0.02em;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ---------- lomo cosido ---------- */

.spine {
  grid-column: 1 / 2;
  grid-row: 1 / -1;
  min-height: 100%;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--accent) 0 2px,
    transparent 2px 16px
  );
  background-position: left top;
  background-repeat: repeat-y;
  background-size: 22px 100%;
}

/* ---------- portada ---------- */

.hero {
  padding-top: 58px;
  padding-bottom: var(--rhythm);
  border-bottom: 1px solid rgba(28, 30, 32, 0.14);
}

.hero-text { grid-column: 2 / 11; }

.kicker {
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin: 0 0 18px;
}

h1 {
  font-size: clamp(34px, 6.2vw, 62px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  font-weight: 700;
  margin: 0 0 26px;
  max-width: 16ch;
}

.rule-double {
  border: 0;
  border-top: 3px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  height: 5px;
  margin: 0 0 26px;
  max-width: 320px;
}

.hero-lead {
  grid-column: 2 / 8;
  font-size: 19px;
  color: var(--ink);
  margin: 0;
}

.hero-figure {
  grid-column: 7 / 13;
  margin: 44px 0 0;
}

.hero-figure img { width: 100%; }

figcaption {
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-top: 10px;
  text-align: left;
}

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

.band {
  padding-top: var(--rhythm);
  padding-bottom: var(--rhythm);
}

.band--alt { background: var(--paper-alt); }

.band--deep {
  background: var(--deep);
  color: var(--paper);
}

.rubric {
  grid-column: 1 / 3;
  padding-left: 36px;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  border-bottom: 1px solid rgba(29, 107, 143, 0.45);
  padding-bottom: 6px;
  margin: 0 0 8px;
  align-self: start;
}

.col {
  grid-column: 3 / 9;
}

.col--wide {
  grid-column: 3 / 11;
  font-size: 19px;
}

h2 {
  font-size: clamp(24px, 3vw, 31px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  font-weight: 700;
  margin: 0 0 18px;
}

h3 {
  font-size: 19px;
  font-weight: 700;
  margin: 30px 0 10px;
}

p { margin: 0 0 18px; }

.col > :last-child,
.col--wide > :last-child { margin-bottom: 0; }

ul, ol { margin: 0 0 18px; padding-left: 20px; }

li { margin-bottom: 8px; }

ul.marks {
  list-style: none;
  padding-left: 0;
}

ul.marks li {
  position: relative;
  padding-left: 24px;
}

ul.marks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 13px;
  height: 2px;
  background: var(--accent);
}

ol.steps {
  list-style: none;
  counter-reset: paso;
  padding-left: 0;
}

ol.steps li {
  counter-increment: paso;
  position: relative;
  padding-left: 38px;
}

ol.steps li::before {
  content: counter(paso, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  line-height: 1.9;
}

.sep {
  display: flex;
  justify-content: center;
  gap: 9px;
  padding: 6px 0;
}

.sep span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--accent);
}

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

.band--deep .rubric {
  color: #9dc7e0;
  border-bottom-color: rgba(245, 244, 240, 0.35);
}

.band--deep h2 { color: var(--paper); }

.band--deep a { color: #f0b39c; }

.band--deep figcaption { color: #b9c8d5; }

.deep-figure {
  grid-column: 3 / 7;
  margin: 0;
}

.deep-figure img { width: 100%; }

.deep-text {
  grid-column: 8 / 13;
}

/* ---------- índice de contenidos ---------- */

.index-list {
  grid-column: 3 / 11;
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: var(--gutter);
}

.index-list li {
  border-top: 1px solid rgba(28, 30, 32, 0.2);
  padding: 12px 0;
  margin: 0;
}

.index-list .num {
  display: block;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--accent-2);
}

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

.page-head {
  padding-top: 54px;
  padding-bottom: 34px;
}

.page-head .hero-text { grid-column: 2 / 11; }

.page-head h1 {
  font-size: clamp(30px, 4.6vw, 46px);
  max-width: 20ch;
}

.dropcap::first-letter {
  float: left;
  font-size: 62px;
  line-height: 0.86;
  font-weight: 700;
  color: var(--accent);
  padding: 6px 12px 0 0;
}

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

.site-footer {
  border-top: 1px solid rgba(28, 30, 32, 0.2);
  padding: 52px 0 62px;
  text-align: center;
}

.footer-brand {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 18px;
}

.footer-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin: 0 0 20px;
  padding: 0;
}

.footer-nav li { margin: 0; }

.footer-nav li + li {
  border-left: 1px solid rgba(28, 30, 32, 0.3);
}

.footer-nav a {
  display: inline-block;
  padding: 2px 14px;
  color: var(--ink);
  text-decoration: none;
  font-size: 14.5px;
}

.footer-nav a:hover { color: var(--accent); }

.footer-mail { margin: 0 0 12px; }

.footer-note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 52ch;
  margin: 0 auto;
}

/* ---------- adaptación ---------- */

@media (max-width: 980px) {
  .hero-text,
  .hero-lead,
  .page-head .hero-text { grid-column: 2 / 13; }
  .hero-figure { grid-column: 2 / 13; }
  .col, .col--wide, .index-list { grid-column: 2 / 13; }
  .rubric { grid-column: 1 / 13; }
  .deep-figure { grid-column: 2 / 8; }
  .deep-text { grid-column: 2 / 13; margin-top: 30px; }
}

@media (max-width: 700px) {
  :root { --rhythm: 46px; --gutter: 16px; }

  body { font-size: 16.5px; }

  .grid { grid-template-columns: 1fr; }

  .spine {
    display: block;
    grid-row: auto;
    min-height: 0;
    height: 4px;
    margin-bottom: 22px;
    background-image: repeating-linear-gradient(
      to right,
      var(--accent) 0 2px,
      transparent 2px 16px
    );
    background-size: 100% 4px;
    background-repeat: repeat-x;
  }

  .hero-text,
  .hero-lead,
  .hero-figure,
  .page-head .hero-text,
  .col,
  .col--wide,
  .rubric,
  .index-list,
  .deep-figure,
  .deep-text { grid-column: 1 / -1; }

  .hero { padding-top: 34px; }

  .hero-figure { margin-top: 30px; }

  .hero-lead { font-size: 17.5px; }

  .col--wide { font-size: 17.5px; }

  .index-list { grid-template-columns: 1fr; }

  .topbar .wrap { padding-top: 14px; padding-bottom: 14px; }

  .nav { margin-left: 0; width: 100%; }

  .nav ul { gap: 6px 16px; }

  .dropcap::first-letter { font-size: 50px; }

  .rubric { padding-left: 0; }
}