/* ============================================================
   EDITORIAL SATURNO — sistema visual
   Cuaderno escolar en paleta cálida: cremas, sepias, ámbar,
   cuero. Acentos: rojo de margen, azul Francia, pizarrón.
   Tipos: Yeseva One (vintage display) · Source Serif 4 (texto)
   · Caveat (manuscrita / tiza)
   ============================================================ */

:root {
  --paper: #f8f5ee;
  --paper-light: #fdfbf6;
  --paper-deep: #efe8d8;
  --ink: #3d2f21;
  --ink-soft: #71604c;
  --ink-faint: #a08c72;
  --leather: #6b4226;
  --amber: #a86f1f;
  --rojo-margen: #c05a48;
  --azul-francia: #3c5d9e;
  --pizarra: #36463c;
  --pizarra-deep: #2c3a31;
  --tiza: #f3ecda;
  --linea: rgba(102, 80, 56, 0.16);
  --display: "Yeseva One", "Georgia", serif;
  --texto: "Source Serif 4", "Georgia", serif;
  --mano: "Caveat", cursive;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--texto);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--leather); text-decoration-color: rgba(168, 111, 31, 0.5); text-underline-offset: 3px; }
a:hover { color: var(--amber); }

.container { max-width: 1080px; margin: 0 auto; padding: 0 32px; }

/* ---------- barra superior ---------- */
.topbar {
  border-bottom: 1px solid var(--linea);
  font-size: 14px;
  color: var(--ink-soft);
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 8px;
  padding-bottom: 8px;
  gap: 16px;
}
.topbar .fecha { font-family: var(--mano); font-size: 19px; color: var(--rojo-margen); }
.topbar .edicion { letter-spacing: 0.08em; text-transform: uppercase; font-size: 12px; }

/* ---------- cabecera / masthead ---------- */
.masthead {
  text-align: center;
  padding: 38px 24px 26px;
}
.masthead .marca {
  display: inline-flex;
  align-items: center;
  gap: 22px;
  color: var(--ink);
  text-decoration: none;
}
.masthead .palabra {
  font-family: var(--display);
  font-size: clamp(34px, 5.4vw, 58px);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  line-height: 1;
}
.masthead .planeta { color: var(--amber); flex: none; }
.masthead .lema {
  margin-top: 14px;
  font-family: var(--mano);
  font-size: 23px;
  color: var(--ink-soft);
}

/* logo planeta (círculo + anillo) */
.planeta svg { display: block; }

/* ---------- navegación ---------- */
.mainnav {
  border-top: 3px double var(--ink);
  border-bottom: 3px double var(--ink);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 50;
}
.mainnav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
}
.mainnav a {
  display: block;
  white-space: nowrap;
  padding: 12px 22px;
  font-size: 13.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
}
.mainnav a:hover { color: var(--rojo-margen); }
.mainnav a.activo {
  color: var(--rojo-margen);
  position: relative;
}
.mainnav a.activo::after {
  content: "";
  position: absolute;
  left: 22px; right: 22px; bottom: 8px;
  height: 2px;
  background: var(--rojo-margen);
  border-radius: 2px;
  transform: rotate(-0.6deg);
}

/* ---------- papel rayado ---------- */
.ruled {
  background-color: var(--paper-light);
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 31px,
    var(--linea) 31px,
    var(--linea) 32px
  );
}
.margen { position: relative; }
.margen::before {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  left: 64px;
  width: 1.5px;
  background: rgba(192, 90, 72, 0.55);
}

/* ---------- títulos de sección ---------- */
.titulo-seccion {
  display: flex;
  align-items: center;
  gap: 18px;
  margin: 0 0 28px;
}
.titulo-seccion::before,
.titulo-seccion::after {
  content: "";
  flex: 1;
  border-top: 3px double var(--ink-faint);
}
.titulo-seccion .rotulo {
  font-family: var(--display);
  font-size: 26px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  white-space: nowrap;
}
.titulo-seccion .rotulo small {
  display: block;
  text-align: center;
  font-family: var(--mano);
  font-size: 18px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--rojo-margen);
  margin-top: 2px;
}

/* ---------- fichas (tarjetas de cuento) ---------- */
.ficha {
  background: #ffffff;
  border: 1px solid rgba(107, 66, 38, 0.28);
  box-shadow: 2px 3px 0 rgba(61, 47, 33, 0.12);
  padding: 26px 26px 22px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ficha .serie {
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
}
.ficha h3 {
  margin: 0;
  font-family: var(--display);
  font-size: 24px;
  font-weight: 400;
  line-height: 1.25;
}
.ficha h3 a { color: var(--ink); text-decoration: none; }
.ficha h3 a:hover { color: var(--leather); }
.ficha .extracto {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15.5px;
  font-style: italic;
}
.ficha .pie {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed rgba(107, 66, 38, 0.35);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 13px;
  color: var(--ink-faint);
}
.ficha .pie .leer {
  font-family: var(--mano);
  font-size: 18px;
  color: var(--rojo-margen);
  text-decoration: none;
}
.ficha .pie .leer:hover { text-decoration: underline; }

/* esquina doblada */
.ficha.doblada::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  border-style: solid;
  border-width: 0 22px 22px 0;
  border-color: var(--paper) var(--paper) var(--paper-deep) var(--paper-deep);
  box-shadow: -1px 1px 1px rgba(61, 47, 33, 0.12);
}

/* ---------- cinta adhesiva ---------- */
.tape {
  position: absolute;
  width: 92px;
  height: 26px;
  background: rgba(232, 218, 178, 0.65);
  border-left: 1px dashed rgba(120, 95, 60, 0.25);
  border-right: 1px dashed rgba(120, 95, 60, 0.25);
  box-shadow: 0 1px 2px rgba(61, 47, 33, 0.12);
  top: -13px;
  left: 50%;
  transform: translateX(-50%) rotate(-2deg);
}

/* ---------- pizarrón ---------- */
.chalkboard {
  background: var(--pizarra);
  background-image: radial-gradient(ellipse at 30% 20%, rgba(255,255,255,0.05), transparent 55%);
  color: var(--tiza);
  border: 10px solid #7a5634;
  border-image: linear-gradient(135deg, #8a6540, #6b4a2c, #8a6540) 1;
  box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.35), 3px 5px 0 rgba(61, 47, 33, 0.18);
}
.chalkboard .mano-tiza {
  font-family: var(--mano);
  color: var(--tiza);
}

/* ---------- botones ---------- */
.btn {
  display: inline-block;
  font-family: var(--texto);
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--paper-light);
  background: var(--leather);
  border: none;
  padding: 13px 28px;
  box-shadow: 2px 3px 0 rgba(61, 47, 33, 0.3);
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn:hover { color: var(--paper-light); transform: translate(-1px, -1px); box-shadow: 3px 4px 0 rgba(61, 47, 33, 0.3); }
.btn:active { transform: translate(1px, 2px); box-shadow: 1px 1px 0 rgba(61, 47, 33, 0.3); }
.btn.secundario {
  background: transparent;
  color: var(--leather);
  border: 1.5px solid var(--leather);
  box-shadow: 2px 3px 0 rgba(61, 47, 33, 0.15);
}
.btn.secundario:hover { color: var(--rojo-margen); border-color: var(--rojo-margen); }

/* ---------- formularios ---------- */
.campo { display: flex; flex-direction: column; gap: 6px; margin-bottom: 22px; }
.campo label {
  font-size: 12.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.campo input[type="text"],
.campo input[type="email"],
.campo input[type="url"],
.campo textarea,
.campo select {
  font-family: var(--texto);
  font-size: 17px;
  color: var(--ink);
  background: transparent;
  border: none;
  border-bottom: 1.5px solid rgba(107, 66, 38, 0.45);
  padding: 8px 2px;
  outline: none;
}
.campo input:focus,
.campo textarea:focus,
.campo select:focus { border-bottom-color: var(--rojo-margen); }
.campo textarea { resize: vertical; line-height: 32px; }

/* ---------- pie de página ---------- */
.footer {
  margin-top: 80px;
  background: var(--pizarra-deep);
  color: rgba(243, 236, 218, 0.8);
}
.footer .container {
  padding-top: 48px;
  padding-bottom: 40px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
}
.footer .marca-pie {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--display);
  font-size: 21px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tiza);
}
.footer .marca-pie .planeta { color: var(--tiza); }
.footer .frase {
  font-family: var(--mano);
  font-size: 21px;
  margin-top: 14px;
  color: rgba(243, 236, 218, 0.75);
}
.footer h4 {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(243, 236, 218, 0.55);
  font-weight: 600;
}
.footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.footer a { color: rgba(243, 236, 218, 0.85); text-decoration: none; font-size: 15px; }
.footer a:hover { color: #fff; text-decoration: underline; }
.footer .colofon {
  border-top: 1px solid rgba(243, 236, 218, 0.15);
  text-align: center;
  font-size: 13px;
  color: rgba(243, 236, 218, 0.5);
  padding: 16px 24px;
}

/* ---------- utilidades ---------- */
.hand { font-family: var(--mano); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .footer .container { grid-template-columns: 1fr; gap: 28px; }
  .margen::before { left: 28px; }
}