/* Koboti — hoja de estilos común
   Composición de pauta: margen izquierdo vacío, línea vertical, texto en seis columnas. */

:root {
  --paper: #f1f2f0;
  --paper-alt: #e3e5e2;
  --ink-bg: #141614;
  --ink: #171917;
  --ink-soft: #6a6e6a;
  --ink-inv: #f1f2f0;
  --accent: #2a6b3c;
  --accent-2: #8a6a20;
  --rail: #c9ccc8;
  --guide: #d4d7d3;
  --rhythm: 72px;
  --line: 28px;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  --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(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  overflow-x: hidden;
}

/* ---------- retícula ---------- */

.band { padding: var(--rhythm) 0; }
.band--alt { background: var(--paper-alt); }
.band--ink {
  background: var(--ink-bg);
  color: var(--ink-inv);
  --ink-soft: #a7aca7;
  --rail: #3a3f3a;
  --guide: #333833;
}

.sheet {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

.rail {
  grid-column: 3;
  grid-row: 1 / -1;
  border-right: 1px solid var(--rail);
}
.band--ink .rail { border-right-color: var(--accent); }

.col { grid-column: 4 / 10; }
.col-wide { grid-column: 4 / 12; }
.margin-note {
  grid-column: 1 / 3;
  text-align: right;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  padding-top: 10px;
}
.margin-note--plain {
  text-transform: none;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

.initial {
  grid-column: 1 / 3;
  justify-self: end;
  font-family: var(--mono);
  font-size: 56px;
  line-height: 1;
  color: var(--accent);
  margin: 0;
  padding-top: 2px;
}

/* ---------- tipografía ---------- */

h1, h2, h3 {
  font-family: var(--mono);
  text-transform: uppercase;
  font-weight: 600;
  margin: 0;
}

h1 {
  font-size: clamp(27px, 3.6vw, 40px);
  line-height: 1.24;
  letter-spacing: 0.02em;
  max-width: 20ch;
}

h2 {
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.35;
  letter-spacing: 0.09em;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--guide);
}

h3 {
  font-size: 15px;
  line-height: 1.5;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-top: calc(var(--line) * 1.25);
}
.band--ink h3 { color: #8fc39c; }

p { margin: var(--line) 0 0; max-width: 74ch; }
.lead { font-size: 19px; line-height: 1.7; }

a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
.band--ink a { color: #9ecdaa; }

a:focus-visible,
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.band--ink a:focus-visible { outline-color: var(--ink-inv); }

.caption {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 12px 0 0;
  text-transform: none;
}

.guide {
  border: 0;
  border-top: 1px solid var(--guide);
  margin: var(--line) 0 0;
}
.guide--accent { border-top-color: var(--accent); }

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

ul.check, ol.steps {
  margin: var(--line) 0 0;
  padding: 0;
  list-style: none;
}
ul.check li, ol.steps li {
  position: relative;
  padding-left: 30px;
  margin-top: 10px;
}
ul.check li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}
ol.steps { counter-reset: paso; }
ol.steps li { counter-increment: paso; }
ol.steps li::before {
  content: counter(paso, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent-2);
}
.band--ink ol.steps li::before { color: #cba76a; }

dl { margin: var(--line) 0 0; }
dt {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  margin-top: 18px;
}
dd { margin: 4px 0 0; }

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

.site-header {
  border-bottom: 1px solid var(--rail);
  background: var(--paper);
}
.site-header .sheet { padding-top: 18px; padding-bottom: 18px; }

.brand {
  grid-column: 1 / 4;
  font-family: var(--mono);
  font-size: 17px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  align-self: center;
}
.brand:hover { color: var(--accent); }

.site-nav { grid-column: 4 / 13; align-self: center; }
.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.site-nav a { color: var(--ink); text-decoration: none; padding-bottom: 3px; }
.site-nav a:hover { color: var(--accent); border-bottom: 1px solid var(--accent); }
.site-nav a[aria-current="page"] { border-bottom: 1px solid var(--accent-2); }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
}
.skip:focus {
  left: 12px;
  top: 12px;
  z-index: 5;
  background: var(--paper);
  padding: 8px 14px;
  font-family: var(--mono);
  font-size: 12px;
}

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

.hero { padding-top: calc(var(--rhythm) * 0.8); }

.hero-initial {
  grid-column: 1 / 3;
  justify-self: end;
  font-family: var(--mono);
  font-size: clamp(64px, 9vw, 108px);
  line-height: 0.92;
  color: var(--accent);
  align-self: start;
}

.hero-text { grid-column: 4 / 11; }
.hero-lead { grid-column: 4 / 10; }

.figure-main {
  grid-column: 6 / 13;
  margin: 0;
}
.figure-main img,
.figure-ink img {
  display: block;
  width: 100%;
  height: auto;
}

.stack { margin-top: var(--rhythm); }
.stack--half { margin-top: calc(var(--rhythm) / 2); }

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

.figure-ink {
  grid-column: 3 / 7;
  margin: 0;
}
.ink-text { grid-column: 8 / 13; }

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

.site-footer {
  background: var(--paper-alt);
  border-top: 1px solid var(--accent);
  padding: calc(var(--rhythm) * 0.7) 0;
}
.footer-rail {
  grid-column: 1;
  grid-row: 1 / -1;
  border-right: 1px solid var(--rail);
}
.footer-name {
  grid-column: 2 / 6;
  font-family: var(--mono);
  font-size: 15px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}
.footer-nav { grid-column: 2 / 10; margin-top: 14px; }
.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.footer-nav li + li::before {
  content: "/";
  color: var(--accent-2);
  margin: 0 12px;
}
.footer-nav a { color: var(--ink); text-decoration: none; }
.footer-nav a:hover { color: var(--accent); text-decoration: underline; }
.footer-contact {
  grid-column: 10 / 13;
  text-align: right;
  font-size: 15px;
  align-self: start;
}
.footer-contact p { margin: 0; }
.footer-note {
  grid-column: 2 / 10;
  margin-top: 20px;
  font-size: 14px;
  color: var(--ink-soft);
  max-width: 60ch;
}

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

@media (max-width: 1000px) {
  .hero-text { grid-column: 4 / 13; }
  .hero-lead, .col { grid-column: 4 / 12; }
  .col-wide { grid-column: 4 / 13; }
  .figure-main { grid-column: 4 / 13; }
  .figure-ink { grid-column: 3 / 8; }
  .ink-text { grid-column: 3 / 13; }
  .footer-contact { grid-column: 2 / 10; text-align: left; margin-top: 16px; }
}

@media (max-width: 760px) {
  :root { --rhythm: 44px; --line: 24px; }

  body { font-size: 16px; line-height: 1.7; }

  .sheet {
    display: block;
    padding: 0 18px 0 16px;
    border-left: 1px solid var(--rail);
    margin-left: 14px;
  }
  .band--ink .sheet { border-left-color: var(--accent); }

  .rail, .footer-rail { display: none; }

  .brand, .site-nav, .col, .col-wide, .hero-text, .hero-lead,
  .figure-main, .figure-ink, .ink-text, .initial, .hero-initial,
  .margin-note, .footer-name, .footer-nav, .footer-contact, .footer-note {
    display: block;
    width: auto;
    text-align: left;
    padding-top: 0;
  }

  .site-header .sheet { padding-top: 16px; padding-bottom: 16px; }
  .site-nav { margin-top: 12px; }

  .margin-note { margin-bottom: 8px; }
  .initial { font-size: 34px; margin-bottom: 6px; }
  .hero-initial { font-size: 58px; margin-bottom: 10px; }

  .figure-ink { margin-bottom: var(--line); }
  .figure-ink img { max-width: 420px; }

  .footer-contact { margin-top: 14px; }
  .footer-nav li + li::before { margin: 0 8px; }

  p, .footer-note { max-width: none; }
}

@media (max-width: 420px) {
  .footer-nav ul { display: block; }
  .footer-nav li { margin-top: 6px; }
  .footer-nav li + li::before { content: ""; margin: 0; }
}