/*======================
 Variables globales
======================*/
:root {
  --primary-bg: #2c3e50;
  --secondary-bg: #34495e;
  --main-green: #25d366;
  --heading-blue: #15466e;
  --subheading-blue: #17608a;
  --text-dark: #222;
  --text-light: #fff;
  --gray-bg: #f7f7f7;
  --box-shadow: 0 2px 20px rgba(48,47,46,0.06);
  --small-shadow: 0 2px 6px rgba(30,30,30,0.07);
  --footer-shadow: 0 2px 16px rgba(44,62,80,0.09);
}

/*======================
 Reset y base
======================*/
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: var(--gray-bg);
  color: var(--text-dark);
  line-height: 1.6;
}

/*======================
 Header y menú
======================*/
header {
  background: var(--primary-bg);
  color: var(--text-light);
  padding: 20px 0;
  box-shadow: var(--small-shadow);
}

.wrapper {
  max-width: 1200px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo img {
  height: 55px;
  width: auto;
}

nav ul.nav-menu {
  list-style: none;
  display: flex;
  gap: 30px;
}

nav ul.nav-menu li a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s, background 0.2s;
  padding: 8px 15px;
  border-radius: 4px;
}

nav ul.nav-menu li a:hover,
nav ul.nav-menu li a:focus {
  color: #ecf0f1;
  background: var(--secondary-bg);
  outline: 2px dashed var(--main-green);
  outline-offset: 2px;
}

/*======================
 Botón flotante
======================*/
.float {
  position: fixed;
  width: 60px;
  height: 60px;
  right: 30px;
  bottom: 30px;
  background-color: var(--main-green);
  color: var(--text-light);
  border-radius: 50%;
  text-align: center;
  box-shadow: 2px 2px 8px rgba(34,34,34,0.2);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.float i {
  font-size: 2em;
  display: block;
  margin: 0 auto;
}

/*======================
 Secciones generales
======================*/
main {
  max-width: 1100px;
  margin: 40px auto 0 auto;
  padding: 0 1.5rem;
}

section {
  background: var(--text-light);
  border-radius: 10px;
  margin-bottom: 40px;
  padding: 2.2rem 1.5rem;
  box-shadow: var(--box-shadow);
}

/*======================
 Titulares
======================*/
section h1 {
  font-size: 2rem;
  margin-bottom: 12px;
  color: var(--heading-blue);
  border-left: 4px solid var(--main-green);
  padding-left: 14px;
  font-weight: 600;
}

section h2 {
  font-size: 1.35rem;
  margin-top: 22px;
  margin-bottom: 9px;
  color: var(--subheading-blue);
}

/*======================
 Párrafos
======================*/
.parrafo p, section p, article p {
  margin-bottom: 1rem;
  font-size: 1.08rem;
}

/*======================
 Listas
======================*/
ul {
  margin-top: 0.5rem;
  margin-bottom: 1rem;
  padding-left: 1.4rem;
}

ul li {
  margin-bottom: 0.5rem;
  font-size: 1.07rem;
}

/*======================
 Mosaico de imágenes
======================*/
.mosaic-container,
.mosaic-container .left-column {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  margin-bottom: 1.6rem;
}

.mosaic-container img,
.mosaic-container .left-column img {
  width: 180px;
  height: 120px;
  object-fit: cover;
  border-radius: 8px;
  border: 2px solid #e0e0e0;
  transition: transform 0.2s, border-color 0.2s;
}

.mosaic-container img:hover,
.mosaic-container .left-column img:hover {
  transform: scale(1.05);
  border-color: var(--main-green);
}

/*======================
 Imágenes de productos en artículo
======================*/
img.producto {
  width: 400px;
  height: auto;
  margin: 15px;
  border-radius: 7px;
  object-fit: cover;
  border: 2px solid #e0e0e0;
}

/*======================
 Videos dentro de aplicaciones
======================*/
.aplicaciones video {
  width: 95%;
  max-width: 420px;
  display: block;
  border-radius: 12px;
  margin: 22px auto;
  background: #c0dccb;
}

/*======================
 Footer
======================*/
.footer {
  background: var(--heading-blue);
  color: #f3f3f3;
  border-radius: 0 0 10px 10px;
  margin-top: 35px;
  padding-top: 20px;
  padding-bottom: 12px;
  box-shadow: var(--footer-shadow);
}

.footer-section.contact ul {
  padding-left: 25px;
  margin-bottom: 0;
}

.footer-section.contact li {
  margin-bottom: 8px;
  font-size: 1rem;
}

.footer-section.contact li i {
  margin-right: 8px;
}

.footer-bottom {
  text-align: center;
  font-size: 0.98rem;
  margin-top: 17px;
  opacity: 0.7;
}

/*======================
 Responsive Design
======================*/
@media (max-width: 800px) {
  .wrapper {
    flex-direction: column;
    gap: 14px;
  }
  nav ul.nav-menu {
    flex-direction: column;
    gap: 12px;
    width: 100%;
    align-items: flex-start;
    justify-content: flex-start;
    padding-left: 0;
  }
  nav ul.nav-menu li a {
    width: 100%;
    text-align: left;
  }
  .mosaic-container,
  .mosaic-container .left-column {
    flex-direction: column;
    align-items: center;
  }
  section {
    padding: 1.1rem 0.5rem;
  }
  section h1 {
    font-size: 1.6rem;
    padding-left: 8px;
  }
  /* Ajuste de tamaño para productos en tabletas y pantallas medianas */
  img.producto {
    width: 280px;
    margin: 12px auto;
    display: block;
  }
}

@media (max-width: 480px) {
  nav ul.nav-menu li a {
    border-bottom: 1px solid rgba(255,255,255,0.1);
    display: block;
    width: 100%;
    padding: 12px 18px;
    font-size: 1.1rem;
  }
  nav ul.nav-menu {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }
  .logo img {
    height: 45px;
  }
  header {
    padding: 15px 0;
  }
  .wrapper {
    gap: 10px;
  }
  /* Ajuste de tamaño para productos en celulares */
  img.producto {
    width: 180px;
    margin: 10px auto;
    display: block;
  }
}

/*======================
 Dark Mode (opcional)
======================*/
@media (prefers-color-scheme: dark) {
  body {
    background: #121212;
    color: #f7f7f7;
  }
  section,
  .footer {
    background: #222;
    color: #f3f3f3;
  }
  header {
    background: #223041;
  }
  nav ul.nav-menu li a {
    color: #f7f7f7;
  }
}