body{
    background-color: #0D1117;
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    padding: 0;
}

.le1{
  color: azure;
}

header{
    padding: 10px;
    border-width: 3px;
    border-color: #3D444D;
    /*border-style: solid;*/
    margin-bottom: 25px;
    background: #161b22d0;
    border-radius: 0 0 16px 16px;
}

.contenedor {
  display: flex;
  width: 100%;
  max-width: 850px;
  margin: auto;
}
.columna {
  flex: 1;
  padding: 16px;
  box-sizing: border-box;
  text-align: center;
}

.col1{
  border-radius: 8px 0px 0px 8px;
}

.col3{
  border-radius: 0px 8px 8px 0px;
}

.col4{
  background-color: #1A1B27;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.col4:hover{
    transform: translateY(-7px) scale(1.03);
    box-shadow: 0 8px 24px rgba(0,0,0,0.16);
}

.ejemplos{
    border-radius: 15px;
}

.contenedor-cards {
  display: flex;
  gap: 20px;
  width: 100%;
  justify-content: space-between;
  margin: 30px auto 20px auto;
  max-width: 850px;
}

.card {
  flex: 1;
  background: #1A1B27;
  border: 1px solid #3D444D;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.09);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover{
  transform: translateY(-10px) scale(1.03);
  box-shadow: 0 8px 24px rgba(0,0,0,0.19);
}
.card img {
  width: 100%;
  height: 340px;
  object-fit: cover;
}
.card-body {
  padding: 18px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.card-title {
  font-size: 1.2em;
  margin: 0 0 8px 0;
  color: #61dafb;
}
.card-text {
  flex: 1;
  font-size: 1em;
  margin-bottom: 16px;
}
.btn {
  background: #000;
  color: #fff;
  text-decoration: none;
  padding: 9px 16px;
  border-radius: 6px;
  text-align: center;
  transition: background 0.2s, box-shadow 0.2s;
  display: inline-block;
  font-weight: 500;
  font-size: 1em;
  letter-spacing: 0.5px;
}
.btn:hover {
  background: #0056b3;
  color: #fff;
  box-shadow: 0 2px 8px #0056b368;
}
.about-section, .contact-section {
  margin: 40px auto 0 auto;
  background: #17181f;
  border-radius: 14px;
  padding: 38px 18px;
  box-shadow: 0 4px 18px rgba(0,0,0,0.14);
  max-width: 850px;
}
.about-section h2, .contact-section h2 {
  color: #61dafb;
  margin-bottom: 14px;
}
.contact-section .btn-wsp {
  background: #25D366;
  color: #fff;
  border: none;
  display: inline-flex;
  align-items: center;
  font-weight: bold;
  gap: 8px;
  margin-top: 16px;
  font-size: 1.08em;
  box-shadow: 0 1px 5px #25d36648;
}
.contact-section .btn-wsp:hover {
  background: #128C7E;
  color: #fff;
  box-shadow: 0 2px 12px #128c7e4d;
}
.nav-link {
  color: inherit;
  text-decoration: none;
  font-weight: 500;
  transition: color .2s;
  padding: 8px 0;
  display: inline-block;
}
.nav-link:hover {
  color: #61dafb;
}
@media (max-width: 1000px) {
  .contenedor-cards {
    flex-direction: column;
    gap: 22px;
  }
  .contenedor {
    flex-direction: column;
  }
}
@media (max-width: 768px) {
  header {
    padding: 7px;
  }
  .about-section, .contact-section {
    padding: 18px 6px;
    margin: 28px 3vw;
  }
  .card img {
    height: 210px;
  }
}
.ejemplo-aclaracion {
  max-width: 850px;
  margin: 0 auto 8px auto;
  background: #23262f;
  border-radius: 10px;
  padding: 14px 18px;
  box-shadow: 0 1px 7px #0003;
}
.ejemplo-aclaracion p {
  margin: 0;
  color: #cdd9e5;
  text-align: justify;
  font-size: 1em;
}