/* Huerto Escuela IMJUS — hoja única
   Dirección: cuaderno de campo. Papel, tinta, reglas finas y aire.
   Sin dependencias, sin JavaScript. */

:root {
  --papel: #f4eee3;
  --papel-hondo: #ece4d6;
  --tinta: #1b241d;
  --tinta-suave: #4a5449;
  --oliva: #6a7549;
  --oliva-texto: #4d5834;
  --terracota: #a34e2a;
  --agua: #3d6f7d;
  --arena: #e0d4bf;
  --linea: rgba(27, 36, 29, 0.16);
  --linea-fuerte: rgba(27, 36, 29, 0.38);

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: "Avenir Next", Avenir, "Segoe UI", system-ui, -apple-system, sans-serif;

  --medida: 62ch;
  --margen: clamp(1.25rem, 4vw, 4.5rem);
  --ancho: 1180px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  background: var(--papel);
  color: var(--tinta);
  font-family: var(--sans);
  font-size: clamp(1rem, 0.94rem + 0.3vw, 1.08rem);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Grano de papel muy tenue */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.16'/%3E%3C/svg%3E");
}

.saltar {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--tinta);
  color: var(--papel);
  padding: 0.75rem 1.25rem;
  z-index: 100;
}
.saltar:focus { left: 1rem; top: 1rem; }

a {
  color: var(--tinta);
  text-decoration-color: var(--terracota);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}
a:hover { color: var(--terracota); }

:focus-visible {
  outline: 2px solid var(--terracota);
  outline-offset: 4px;
}

/* ---------- Barra ---------- */

.barra {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
  padding: 1rem var(--margen);
  background: color-mix(in srgb, var(--papel) 92%, transparent);
  border-bottom: 1px solid var(--linea);
  backdrop-filter: blur(6px);
}

.marca {
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  white-space: nowrap;
}
.marca-nombre {
  font-family: var(--serif);
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}
.marca-sigla {
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--oliva-texto);
}

.nav {
  display: flex;
  gap: clamp(0.9rem, 2.2vw, 2rem);
  font-size: 0.76rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.nav a { text-decoration: none; color: var(--tinta-suave); }
.nav a:hover { color: var(--terracota); }

@media (max-width: 760px) {
  .nav { display: none; }
}

/* ---------- Portada ---------- */

.portada {
  position: relative;
  overflow: clip;
  padding: clamp(3rem, 11vh, 7rem) var(--margen) clamp(3.5rem, 10vh, 6rem);
  min-height: clamp(30rem, 78svh, 46rem);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  animation: entra 900ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.espiral {
  position: absolute;
  top: clamp(-8rem, -6vw, -2rem);
  right: clamp(-18rem, -14vw, -6rem);
  width: clamp(28rem, 62vw, 52rem);
  height: auto;
  fill: none;
  stroke: var(--oliva);
  stroke-width: 1.1;
  stroke-linecap: round;
  opacity: 0.42;
  z-index: 0;
  animation: gira 90s linear infinite;
  transform-origin: 50% 50%;
}

@keyframes gira {
  to { transform: rotate(360deg); }
}

@keyframes entra {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

.cintillo {
  position: relative;
  z-index: 1;
  margin: 0 0 1.25rem;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--oliva-texto);
}

.portada h1 {
  position: relative;
  z-index: 1;
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(3.2rem, 11.5vw, 8.5rem);
  line-height: 0.88;
  letter-spacing: -0.025em;
}
.portada h1 em {
  font-style: italic;
  color: var(--terracota);
  letter-spacing: -0.01em;
}

.lema {
  position: relative;
  z-index: 1;
  margin: 1.5rem 0 0;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.05rem, 1rem + 0.4vw, 1.25rem);
  letter-spacing: 0.01em;
  color: var(--agua);
}

.entrada {
  position: relative;
  z-index: 1;
  max-width: 46ch;
  margin: clamp(1.5rem, 3vw, 2.5rem) 0 0;
  font-size: clamp(1.05rem, 1rem + 0.5vw, 1.3rem);
  line-height: 1.55;
  color: var(--tinta-suave);
}

.ficha {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  margin: clamp(2.5rem, 6vw, 4rem) 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--linea-fuerte);
  max-width: 52rem;
}
.ficha dt {
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--oliva-texto);
  margin-bottom: 0.3rem;
}
.ficha dd {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.02rem;
}

/* ---------- Bloques ---------- */

.bloque {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding: clamp(3rem, 8vw, 6rem) var(--margen);
  border-top: 1px solid var(--linea);
  max-width: var(--ancho);
  margin-inline: auto;
}

@media (min-width: 900px) {
  .bloque { grid-template-columns: 7rem minmax(0, 1fr); gap: 3rem; }
}

.rail {
  font-family: var(--serif);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: var(--agua);
}
@media (min-width: 900px) {
  .rail { position: sticky; top: 6rem; align-self: start; }
  .rail span::after {
    content: "";
    display: block;
    width: 2.5rem;
    height: 1px;
    margin-top: 0.6rem;
    background: var(--linea-fuerte);
  }
}

.cuerpo { min-width: 0; max-width: 78ch; }

h2,
h1.titulo-pagina {
  margin: 0 0 clamp(1.25rem, 2.5vw, 2rem);
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.9rem, 1.3rem + 2.4vw, 3.1rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

h3 {
  margin: 0 0 0.4rem;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.22rem;
  line-height: 1.25;
}

p { margin: 0 0 1rem; max-width: var(--medida); }

.introduccion {
  font-size: clamp(1.1rem, 1rem + 0.55vw, 1.4rem);
  line-height: 1.5;
  color: var(--tinta-suave);
  max-width: 52ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.columnas {
  display: grid;
  gap: 0 clamp(1.5rem, 4vw, 3.5rem);
  margin-top: 1.5rem;
}
@media (min-width: 720px) {
  .columnas { grid-template-columns: 1fr 1fr; }
}

.nota {
  margin-top: clamp(1.5rem, 3vw, 2.5rem);
  padding-top: 1rem;
  border-top: 1px solid var(--linea);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--tinta-suave);
  max-width: 58ch;
}

/* ---------- Pasos ---------- */

.pasos {
  counter-reset: paso;
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--linea);
  border-top: 1px solid var(--linea);
  border-bottom: 1px solid var(--linea);
}
@media (min-width: 760px) {
  .pasos { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1100px) {
  .pasos { grid-template-columns: repeat(4, 1fr); }
}

.pasos li {
  background: var(--papel);
  padding: 1.4rem clamp(1rem, 2vw, 1.6rem) 1.6rem;
}
.pasos p { margin: 0; font-size: 0.92rem; color: var(--tinta-suave); max-width: 30ch; }

.num {
  display: block;
  margin-bottom: 0.9rem;
  font-family: var(--serif);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--terracota);
}

/* ---------- Cartel de curso ---------- */

.cartel {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  padding: clamp(1.5rem, 3vw, 2.25rem) 0;
  border-top: 1px solid var(--linea-fuerte);
  border-bottom: 1px solid var(--linea-fuerte);
}
@media (min-width: 640px) {
  .cartel { grid-template-columns: auto minmax(0, 1fr); align-items: start; }
}

.cartel-fecha {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-family: var(--serif);
  color: var(--terracota);
}
.cartel-fecha span {
  font-size: clamp(3.2rem, 7vw, 4.6rem);
  line-height: 0.8;
  font-variant-numeric: lining-nums tabular-nums;
}
.cartel-fecha small {
  font-family: var(--sans);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  line-height: 1.5;
  text-transform: uppercase;
  color: var(--tinta-suave);
}

.cartel-texto p { max-width: 52ch; }
.cartel-meta {
  margin-top: 1rem;
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--oliva-texto);
}

/* ---------- Aliados ---------- */

.aliados {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--linea);
}
.aliados li {
  display: grid;
  gap: 0.15rem 2rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--linea);
}
@media (min-width: 700px) {
  .aliados li { grid-template-columns: 14rem minmax(0, 1fr); align-items: baseline; }
}
.aliados strong {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.1rem;
}
.aliados span { color: var(--tinta-suave); font-size: 0.95rem; }

/* ---------- Visítanos ---------- */

.bloque-final { padding-bottom: clamp(4rem, 10vw, 7rem); }

.enlace-menor {
  margin-top: 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.dato-etiqueta {
  margin: 0 0 0.5rem;
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--oliva-texto);
}

/* ---------- Pie ---------- */

.pie {
  border-top: 1px solid var(--linea-fuerte);
  padding: clamp(2rem, 5vw, 3rem) var(--margen);
  max-width: var(--ancho);
  margin-inline: auto;
  font-size: 0.82rem;
  color: var(--tinta-suave);
}
.pie p { margin: 0 0 0.35rem; max-width: none; }
.pie-marca {
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--tinta);
}
.pie-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--linea);
  font-size: 0.76rem;
}

/* Aviso de obra — común a las tres propuestas */
.aviso-obra {
  margin: 0;
  padding: 0.7rem clamp(1.25rem, 4vw, 4.5rem);
  font-family: var(--sans);
  font-size: 0.78rem;
  line-height: 1.5;
  letter-spacing: 0.01em;
  text-align: center;
  color: var(--tinta-suave);
  background: var(--papel-hondo);
  border-bottom: 1px solid var(--linea);
}
.aviso-obra strong { color: var(--terracota); font-weight: 600; }

/* Marca — espiral del huerto */
.marca-espiral {
  display: inline-block;
  width: 26px; height: 26px;
  margin-right: 0.55rem;
  vertical-align: -5px;
  background: var(--terracota);
  -webkit-mask: url(marca/espiral.svg) center / contain no-repeat;
  mask: url(marca/espiral.svg) center / contain no-repeat;
}