/* Drawky — pantalla de lección (dibujo paso a paso). */

.leccion{
  display:none;
}

.paper-background[data-vista="leccion"] .leccion{
  display:grid;
}

.leccion{
  position:absolute;
  inset:0;
  z-index:1;
  grid-template-columns:minmax(0,1fr);
  grid-template-rows:auto minmax(0,1fr) auto;
  gap:clamp(10px,2.2vh,24px);
  padding:
    max(clamp(16px,3.2vh,34px),env(safe-area-inset-top))
    max(clamp(18px,4vw,56px),env(safe-area-inset-right))
    max(clamp(12px,2.4vh,26px),env(safe-area-inset-bottom))
    max(clamp(18px,4vw,56px),env(safe-area-inset-left));
  overflow-y:auto;
  color:#3e342a;
  font-family:Georgia,'Times New Roman',serif;
}

/* --- Cuerpo: dibujo a la izquierda, explicación a la derecha --- */
.leccion-cuerpo{
  display:grid;
  grid-template-columns:minmax(0,1.42fr) minmax(0,1fr);
  gap:clamp(16px,2.6vw,38px);
  width:100%;
  max-width:1180px;
  min-height:0;
  margin:0 auto;
}

.leccion-lamina{
  display:flex;
  align-items:center;
  justify-content:center;
  min-width:0;
  min-height:0;
  margin:0;
}

/* La imagen es la hoja de dibujo: borde de papel y sombra */
.leccion-lamina img{
  display:block;
  width:auto;
  height:auto;
  max-width:100%;
  max-height:100%;
  border:clamp(6px,.9vw,12px) solid #f4f2ed;
  background:#f4f2ed;
  box-shadow:
    4px 14px 22px rgba(65,42,20,.30),
    1px 3px 5px rgba(58,38,19,.22);
  transform:rotate(-.5deg);
}

.leccion-ficha-sombra{
  min-width:0;
  min-height:0;
  filter:
    drop-shadow(4px 13px 10px rgba(65,42,20,.27))
    drop-shadow(1px 4px 3px rgba(58,38,19,.20));
  transform:rotate(.3deg);
}

.leccion-ficha{
  height:100%;
  padding:clamp(18px,2.6vw,36px) clamp(18px,2.4vw,34px);
  overflow-y:auto;
  clip-path:polygon(0.0% 1.6%,7.1% 1.6%,14.3% 1.5%,21.4% 0.4%,28.6% 1.1%,35.7% 0.9%,42.9% 1.0%,50.0% 0.5%,57.1% 0.6%,64.3% 0.9%,71.4% 0.6%,78.6% 0.9%,85.7% 0.3%,92.9% 0.4%,100.0% 1.3%,99.2% 7.1%,99.1% 14.3%,98.8% 21.4%,99.3% 28.6%,99.6% 35.7%,98.8% 42.9%,99.0% 50.0%,98.9% 57.1%,99.0% 64.3%,98.5% 71.4%,99.3% 78.6%,98.8% 85.7%,99.3% 92.9%,100.0% 98.9%,92.9% 98.8%,85.7% 99.3%,78.6% 99.6%,71.4% 99.0%,64.3% 98.7%,57.1% 98.9%,50.0% 99.1%,42.9% 98.8%,35.7% 99.4%,28.6% 99.5%,21.4% 99.2%,14.3% 98.6%,7.1% 99.4%,0.0% 99.5%,0.4% 92.9%,0.3% 85.7%,0.6% 78.6%,1.0% 71.4%,1.3% 64.3%,0.7% 57.1%,0.7% 50.0%,0.6% 42.9%,0.7% 35.7%,1.2% 28.6%,1.0% 21.4%,0.6% 14.3%,0.4% 7.1%);
  background:
    radial-gradient(ellipse at 18% 18%,rgba(255,250,235,.34) 0 9%,transparent 29%),
    radial-gradient(ellipse at 72% 20%,rgba(151,105,55,.070) 0 3%,transparent 20%),
    radial-gradient(ellipse at 85% 76%,rgba(138,91,44,.060) 0 4%,transparent 24%),
    repeating-linear-gradient(7deg,rgba(92,62,35,.028) 0 1px,transparent 1px 4px),
    repeating-linear-gradient(96deg,rgba(116,79,42,.020) 0 1px,transparent 1px 6px),
    linear-gradient(101deg,rgba(239,220,185,.99),rgba(249,236,211,.99) 49%,rgba(239,218,181,.99));
  background-color:#f3dfbd;
  box-shadow:inset 0 0 30px rgba(116,77,39,.10);
}

.leccion-paso{
  display:inline-block;
  padding:.3em .75em .34em;
  font-size:clamp(14px,1.35vw,19px);
  font-style:italic;
  line-height:1;
  color:#4a3f33;
  border-radius:2px;
  background:rgba(151,166,125,.42);
  transform:rotate(-1.2deg);
}

.leccion-ficha h2{
  margin:.55em 0 .5em;
  font-size:clamp(26px,2.9vw,42px);
  font-weight:500;
  line-height:1.02;
  letter-spacing:-.02em;
  color:#2f2822;
}

.leccion-texto p{
  margin:0 0 .7em;
  font-size:clamp(18px,1.75vw,25px);
  line-height:1.42;
}

.leccion-texto h3{
  margin:.75em 0 .25em;
  font-size:clamp(16px,1.4vw,20px);
  font-weight:500;
  font-style:italic;
  color:#2f2822;
}

.leccion-texto ul{
  margin:0;
  padding-left:1.15em;
  font-size:clamp(14px,1.2vw,18px);
  line-height:1.36;
}

.leccion-texto-intro h3 + p{
  font-size:clamp(14px,1.2vw,18px);
  line-height:1.36;
}

.leccion-texto-intro p{
  margin-bottom:.5em;
  font-size:clamp(16px,1.45vw,20px);
  line-height:1.34;
}

/* --- Botones y progreso --- */
.leccion-nav{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:clamp(14px,2.4vw,34px);
}

.leccion-boton{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  min-width:7.4em;
  justify-content:center;
  padding:.62em 1.2em .68em;
  color:#3e342a;
  font-family:inherit;
  font-size:clamp(18px,1.75vw,25px);
  font-style:italic;
  line-height:1;
  border:1px solid rgba(96,62,32,.36);
  border-radius:0;
  background:linear-gradient(101deg,rgba(239,220,185,.96),rgba(249,236,211,.96) 55%,rgba(239,218,181,.96));
  box-shadow:2px 5px 8px rgba(65,42,20,.20), inset 0 0 14px rgba(116,77,39,.10);
  cursor:pointer;
  -webkit-appearance:none;
  appearance:none;
  -webkit-tap-highlight-color:transparent;
  touch-action:manipulation;
}

.leccion-boton span{
  font-style:normal;
  font-size:1.1em;
  line-height:.8;
}

.leccion-boton:active{
  transform:translateY(1px);
  box-shadow:1px 2px 4px rgba(65,42,20,.22), inset 0 0 14px rgba(116,77,39,.10);
}

.leccion-boton-principal{
  background:
    linear-gradient(rgba(151,166,125,.50),rgba(151,166,125,.50)),
    linear-gradient(101deg,rgba(239,220,185,.96),rgba(249,236,211,.96) 55%,rgba(239,218,181,.96));
}

.leccion-boton[hidden]{
  display:inline-flex;
  visibility:hidden;
}

.leccion-puntos{
  display:flex;
  align-items:center;
  flex:0 1 auto;
  min-width:0;
  gap:clamp(3px,.45vw,6px);
  margin:0;
  padding:0;
  list-style:none;
}

.leccion-puntos li{
  flex:0 0 7px;
  height:7px;
  border-radius:50%;
  background:rgba(72,59,48,.26);
  transition:transform .15s ease, background-color .15s ease;
}

.leccion-puntos li.hecho{
  background:rgba(72,59,48,.55);
}

.leccion-puntos li.actual{
  background:#47413a;
  transform:scale(1.7);
}

/* --- Pantallas verticales: dibujo arriba, explicación debajo --- */
@media (orientation:portrait){
  .leccion-cuerpo{
    grid-template-columns:minmax(0,1fr);
    grid-template-rows:minmax(0,1fr) auto;
  }

  .leccion-ficha{
    height:auto;
  }

  .leccion-puntos{
    gap:3px;
  }

  .leccion-puntos li{
    flex:0 1 5px;
    min-width:2px;
    height:5px;
  }

  .leccion-nav{
    gap:clamp(8px,2vw,18px);
  }

  .leccion-boton{
    min-width:0;
    padding:.6em .8em .66em;
    font-size:clamp(15px,2.4vw,22px);
  }
}