* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Rubik", sans-serif;
  background: #f6fff8;
  color: #333;
  line-height: 1.6;
}

header {
  background: linear-gradient(to right, #56ab2f, #a8e063);
  color: #fff;
  padding: 60px 20px;
  text-align: center;
}

header h1 {
  font-size: 2.8em;
  margin-bottom: 10px;
}

header p {
  font-size: 1.2em;
  margin-bottom: 20px;
}

nav a {
  margin: 0 12px;
  color: #ffffff;
  text-decoration: none;
  font-weight: bold;
}

nav a:hover {
  text-decoration: underline;
}

main {
  padding: 40px 20px;
  max-width: 1200px;
  margin: auto;
}

section {
  margin-bottom: 60px;
}

section h2 {
  font-size: 2em;
  margin-bottom: 20px;
  color: #2f6e4f;
  border-bottom: 2px solid #cdeac0;
  padding-bottom: 5px;
}

/* Ebook banner */
.ebook-banner {
  max-width: 600px;
  margin: 0 auto 40px;
  text-align: center;
}

.ebook-banner img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Recetas destacadas */
.recetas-grid {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: stretch;
}

.receta {
  background: #fffde7;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
  flex: 1 1 300px;
  display: flex;
  flex-direction: column;
  text-align: center;
  padding: 20px;
  transition: transform 0.2s;
}

.receta:hover {
  transform: scale(1.02);
}

.receta img {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 8px;
}

.receta h3 {
  margin-top: 15px;
  font-size: 1.1em;
  color: #2f4f2f;
}

/* Lista beneficios */
.benefits-list {
  margin: 20px 0 30px;
  padding-left: 20px;
  list-style: none;
}

.benefits-list li {
  margin-bottom: 10px;
  font-size: 1rem;
  color: #2f6e4f;
}

/* Botones */
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: bold;
  text-decoration: none;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.3s ease;
  margin-top: 15px;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

.btn-group a[href*="keto20guia"] {
  background-color: #28a745;
  color: white;
}

.btn-group a[href*="keto20guia"]:hover {
  background-color: #218838;
}

.btn-group a[download] {
  background-color: #ffc107;
  color: #333;
}

.btn-group a[download]:hover {
  background-color: #e0a800;
}

.btn[href^="mailto"] {
  background: #6fba82;
  color: #fff;
}

.btn[href^="mailto"]:hover {
  background: #4e9f64;
}

.btn[href*="instagram"] {
  background-color: #e1306c;
  color: #fff;
}

.btn[href*="instagram"]:hover {
  background-color: #c42e5c;
}

/* Enlaces */
a {
  color: #2f6e4f;
  text-decoration: none;
  font-weight: bold;
}

a:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  text-align: center;
  padding: 20px;
  background-color: #e8f5e9;
  font-size: 0.9em;
  color: #555;
}

/* Banner de portada animado */
.banner-portada {
  display: block;
  margin: 30px auto;
  max-width: 300px;
  width: 100%;
  height: auto;
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  animation: fadeBounce 1.5s ease-out forwards;
}

/* Animación */
@keyframes fadeBounce {
  0% {
    opacity: 0;
    transform: scale(0.8);
  }
  60% {
    opacity: 1;
    transform: scale(1.05);
  }
  80% {
    transform: scale(0.97);
  }
  100% {
    transform: scale(1);
  }
}
@media (max-width: 768px) {
  .recetas-grid {
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 12px;
    scroll-snap-type: x mandatory;
  }

  .receta {
    flex: 0 0 80%;
    max-width: 80%;
    scroll-snap-align: start;
  }
}

.boton-inactivo {
  opacity: 0.6;
  cursor: default;
  pointer-events: none;
}

.boton-descarga {
  display: inline-block;
  background-color: #ffc107;
  color: #1f1f1f;
  padding: 12px 20px;
  font-weight: bold;
  text-decoration: none;
  border-radius: 6px;
  box-shadow: 2px 2px 0 #e0a800;
  transition: transform 0.1s ease;
  margin: 0 auto;
}

.boton-descarga:hover {
  transform: translateY(-1px);
}

.boton-inactivo {
  pointer-events: none;
  filter: grayscale(0.3) brightness(0.95);
  cursor: default;
}