/* Tetirvo — hoja de estilos común */

:root {
  --bg: #191919;
  --bg-alt: #212121;
  --paper: #f0eeec;
  --ink: #e8e6e4;
  --muted: #918e8c;
  --dark: #191919;
  --accent: #c96f76;
  --accent-2: #8ca0a8;
  --accent-2-dark: #5c6b71;
  --sans: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: Georgia, "Times New Roman", serif;
  --rhythm: 128px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ---------- retícula ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: 24px;
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.col-text { grid-column: 4 / 10; }
.col-list { grid-column: 4 / 11; }
.col-wide { grid-column: 3 / 11; }

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

h1, h2, h3 {
  font-family: var(--sans);
  font-weight: 800;
  margin: 0;
}

h1 {
  font-size: clamp(2.05rem, 4.6vw, 3.15rem);
  line-height: 0.98;
  letter-spacing: -0.035em;
}

h2 {
  font-size: clamp(1.45rem, 2.7vw, 2rem);
  line-height: 1.06;
  letter-spacing: -0.025em;
  margin-bottom: 28px;
}

h3 {
  font-size: 1.06rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 40px 0 14px;
  font-weight: 700;
}

p { margin: 0 0 22px; max-width: 68ch; }

p:last-child { margin-bottom: 0; }

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;
}

.num {
  font-family: var(--sans);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--accent-2);
  margin: 0 0 16px;
}

.lead { font-size: 21px; }

.sub {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0;
}

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

.topnav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 40px;
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  padding: 36px 24px 0;
}

.topnav a {
  color: var(--muted);
  text-decoration: none;
}

.topnav a:hover { color: var(--ink); }

.topnav a[aria-current="page"] {
  color: var(--ink);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 2px;
}

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

.hero {
  min-height: 88vh;
  display: flex;
  flex-direction: column;
}

.hero-text {
  margin-top: auto;
  padding-bottom: 14vh;
  text-align: center;
}

.hero-text h1 { margin-bottom: 26px; }

.hero-text p {
  margin: 0 auto;
  max-width: 46ch;
}

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

main > section { margin-top: var(--rhythm); }

main > section:first-child { margin-top: 0; }

.tint {
  background: var(--bg-alt);
  padding: var(--rhythm) 0;
}

.paper {
  background: var(--paper);
  color: var(--dark);
  padding: var(--rhythm) 0;
}

.paper h2, .paper h3 { color: var(--dark); }

.paper .num { color: var(--accent-2-dark); }

.paper a { color: #a44a52; }

/* ---------- imágenes ---------- */

figure { margin: 0; }

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

.figure-main {
  grid-column: 3 / 11;
  margin: 96px 0 0;
  text-align: center;
}

.figure-main figcaption,
.figure-detail figcaption {
  font-family: var(--sans);
  font-size: 0.78rem;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--accent-2);
  margin-top: 18px;
}

.figure-detail {
  grid-column: 2 / 7;
}

.figure-detail figcaption { color: var(--accent-2-dark); }

.paper-text {
  grid-column: 8 / 13;
  align-self: center;
}

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

ul, ol {
  margin: 0 0 22px;
  padding-left: 1.35em;
  max-width: 62ch;
}

li { margin-bottom: 12px; }

li::marker { color: var(--accent); }

.paper li::marker { color: #a44a52; }

ol { counter-reset: none; }

ol li::marker {
  font-family: var(--sans);
  font-size: 0.9em;
  color: var(--accent-2);
}

.paper ol li::marker { color: var(--accent-2-dark); }

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

.page-head {
  padding: 84px 0 0;
  text-align: center;
}

.page-head h1 { margin-bottom: 22px; }

.page-head p {
  margin: 0 auto;
  color: var(--muted);
  max-width: 44ch;
}

.doc { margin-top: 88px; }

.doc section { margin-top: 72px; }

.doc section:first-of-type { margin-top: 0; }

.doc h2 { margin-bottom: 22px; }

.rule {
  text-align: center;
  color: var(--accent-2);
  font-family: var(--sans);
  letter-spacing: 0.3em;
  margin: 56px 0 0;
}

.about-block { text-align: left; }

.about-block p { margin-left: auto; margin-right: auto; }

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

footer {
  background: var(--bg-alt);
  margin-top: var(--rhythm);
  padding: 112px 24px;
  text-align: center;
}

.paper + footer { margin-top: 0; }

.foot-name {
  font-family: var(--sans);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: 1.35rem;
  margin: 0 0 34px;
}

.footnav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 36px;
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  margin-bottom: 34px;
}

.footnav a { color: var(--muted); text-decoration: none; }

.footnav a:hover { color: var(--ink); }

.foot-mail { margin: 0 0 26px; }

.foot-note {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.6;
  margin: 0 auto;
  max-width: 52ch;
}

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

@media (max-width: 900px) {
  :root { --rhythm: 72px; }

  .col-text, .col-list, .col-wide,
  .figure-main, .figure-detail, .paper-text {
    grid-column: 1 / -1;
  }

  .figure-main { margin-top: 56px; }

  .paper-text { margin-top: 44px; }

  .hero { min-height: 82vh; }

  .hero-text { padding-bottom: 10vh; }

  .topnav { gap: 12px 26px; padding-top: 28px; }

  .page-head { padding-top: 56px; }

  .doc { margin-top: 56px; }

  .doc section { margin-top: 56px; }

  footer { padding: 76px 24px; }
}

@media (max-width: 560px) {
  body { font-size: 17px; }
  .lead { font-size: 19px; }
  .grid { padding: 0 20px; }
  footer { padding: 64px 20px; }
}