* {
  font-family: 'Roboto', Helvetica, Arial, sans-serif;
}
body {
  color: var(--color-on-background);
  background-color: var(--color-background);
}

/* ======================== */
/* DESKTOP: >992px */
/* ======================== */
.container {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 1330px;
  margin: 0 auto;
  padding: 80px 50px 120px; /* 80px arriba, 50px a los lados, 120px abajo */
  /* gap: 50px; */
}

header {
  position: fixed; /*respecto al viewport*/
  z-index: 1000;
  top: 0;
  left: 0;
  width: 100vw;
  background-color: var(--color-background-50); /* semitransparente */
  -webkit-backdrop-filter: blur(10px);        /* para Safari */
  backdrop-filter: blur(10px);                /* efecto glass */
  padding: 40px 0 20px; /* quitamos padding horizontal */
}

.header-content {
  position: relative;
  display: flex;
  max-width: 1330px;
  margin: 0 auto;
  padding: 0 50px;
  align-items: center;
  justify-content: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mode-toggle {
  position: absolute;
  right: 50px;
}

.state-layer-mode-toggle{
  display: flex;
  height: 40px;
  padding: 8px 24px;
  justify-content: center;
  align-items: center;
  gap: 8px;
}

.state-layer-mode-toggle:hover {
  border: 1px solid var(--color-outline);
  border-radius: 12px;
}

.state-layer-mode-toggle span{
  color: var(--color-on-background);
}

.icon-moon,
.icon-sun {
  display: none;
}

/* Modo claro (mostrar sol) */
html:not(.dark-mode) .icon-moon {
  display: inline;
}

/* Modo oscuro (mostrar luna) */
html.dark-mode .icon-sun {
  display: inline;
}

/* para header scroll effect */
header.scroll{
  border-bottom: 1px solid var(--color-outline);
}

main {
  display: flex;
  flex-direction: column;
  margin-top: 50px;
  gap: 50px;
}

/******SECTION--DESCARGA******/
.descarga {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.descarga-texts {
  text-align: center;
}

.botones {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.btn {
  display: flex;
  padding: 16px 24px;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: var(--color-primary);
  border-radius: 10px;
  cursor: pointer;
  overflow: hidden;
  position: relative;
  transition: border-radius 0.3s ease-in-out;

  /* reset para boton*/
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

.state-layer {
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  background-color: var(--color-hover-btn);
  z-index: 1;
  pointer-events: none;
  opacity: 0;
  -webkit-transition: opacity 0.2s ease-in-out;
  transition: opacity 0.2s ease-in-out;
}

.btn:focus {
  outline: none;
}

.btn:hover .state-layer {
  opacity: 0.3;
}

.btn:hover {
  border-radius: 20px;
}

.btn:active .state-layer {
  opacity: 0.6;
}

.btn:active {
  border-radius: 1000px;
}

.btn .body-large-emphasis {
  position: relative;
  z-index: 2;
  color: var(--color-on-primary);
}

.icon-btn {
  position: relative;
  z-index: 2;
}


/******SECTION--DESCRIPCION******/

.descripcion {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 30px;
}

.descripcion-texts {
  flex: 1;
  display: flex;
  min-width: 425px;
  flex-direction: column;
}

.descripcion-pic-container {
  flex: 1;
  display: flex;
  min-width: 425px; 
  justify-content: center;
}

.descripcion-pic-container img {
  height: auto;
  width: 100%;
  border-radius: 12px;
}

/******SECTION--FUNCIONALIDADES******/
.funcionalidades{
  display: flex;
  flex-wrap: wrap;
  justify-content: center; 
  gap: 30px;
}

.card {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 390px;
  min-width: 360px;
  padding: 20px 16px;
  border-radius: 12px;
  border: 1px solid var(--color-outline);
  background: var(--color-container);
}

.funcionalidades-pic-container {
  display: flex;
  /* height: 100%;  */
  align-items: center;
  justify-content: center;
  margin-top: auto;
  border-radius: 4px;
  overflow: hidden;
}

.funcionalidades-pic-container img {
  width: 100%;
  height: auto;
  /* aspect-ratio: 4 / 3; */
  object-fit: cover;
}


/* ======================== */
/* TABLETS: 768px - 992px */
/* ======================== */

@media (min-width: 768px) and (max-width: 992px) {
  .container {
    padding: 60px 40px 80px;
    gap: 40px;
  }

  .mode-toggle {
  right: 40px;
  }

  main {
    gap: 40px;
  }

  .funcionalidades {
    gap: 20px;
  }
  .descripcion-texts {
    min-width: 360px;
  }

  .descripcion-pic-container {
    min-width: 360px;
  }

} 

/* ======================== */
/* MÓVILES: 670px - 767px */
/* ======================== */

@media (min-width: 670px) and (max-width: 767px) {
  .container {
    padding: 30px 20px 80px;
    gap: 20px;
  }

  .mode-toggle {
    right: 20px;
  }

  main {
    margin-top: 80px;
    gap: 30px;
  }

  .descarga {
    gap: 0px;
  }

  .descripcion-texts {
    min-width: 360px;
  }

  .descripcion-pic-container {
    min-width: 360px;
  }

  .funcionalidades {
    flex-wrap: wrap;
    gap: 20px;
  }
}

/* ======================== */
/* MÓVILES: 0px - 669px */
/* ======================== */
@media (max-width: 669px) {
  .container {
    padding: 30px 20px 60px;
    gap: 20px;
  }

  .mode-toggle {
    right: 20px;
  }

  .label {
    display: none;
  }

  main {
    margin-top: 100px;
    gap: 30px;
  }

  .descarga {
    gap: 0px;
  }

  .descripcion {
    gap: 15px;
  }

  .descripcion-texts {
    min-width: 360px;
  }

  .descripcion-pic-container {
    min-width: 360px;
  }
  .funcionalidades {
    gap: 15px;
  }
}

/* Solo mostrar efecto hover en dispositivos con mouse, no en táctiles */
@media (hover: none) and (pointer: coarse) {

  .btn:hover .state-layer {
    opacity: 0;
  }
  .btn:hover {
    border-radius: 10px;
  }
  .btn:active .state-layer {
    opacity: 0.6;
  }
  .btn:active {
    border-radius: 1000px;
  }

  .state-layer-mode-toggle:hover {
    border: none;
  }
}