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

html, body {
  height: 100%;
  width: 100%;
  font-family: sans-serif;
  overflow: hidden;
}

/* Imagen de fondo */
.fullscreen-image {
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
  z-index: -1;
}

/* Botón centrado en la parte inferior */
.download-button {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 20px;
  background-color: rgba(0, 0, 0, 0.7);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 30px;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.4);
  z-index: 1000;
  display: inline-block;
  transition: background-color 0.3s ease, transform 0.2s ease;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.download-button:hover {
  background-color: rgba(0, 0, 0, 0.9);
  transform: translateX(-50%) scale(1.05); /* mantener centrado + efecto */
}