*{box-sizing:border-box;font-family:Arial,Helvetica,sans-serif}
body{margin:0;background:#f5f6fa}

.header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:15px 20px;
  background:#1f4ed8;
  color:#fff;
}

.logo{font-weight:bold;font-size:20px}

.nav a{
  color:#fff;
  margin-left:20px;
  text-decoration:none;
}

.menu-toggle{
  display:none;
  background:none;
  border:none;
  color:#fff;
  font-size:24px;
}

.hero{
  padding:60px 20px;
  text-align:center;
  background:#fff;
}

.cards{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:20px;
  padding:40px;
}

.card{
  background:#fff;
  padding:25px;
  border-radius:12px;
  text-align:center;
  box-shadow:0 4px 10px rgba(0,0,0,.08);
}

.card a{
  display:inline-block;
  margin-top:15px;
  padding:10px 18px;
  background:#1f4ed8;
  color:#fff;
  border-radius:6px;
  text-decoration:none;
}

.footer{
  text-align:center;
  padding:15px;
  background:#eee;
}

/* MOBILE */
@media(max-width:768px){
  .nav{
    display:none;
    flex-direction:column;
    background:#1f4ed8;
    position:absolute;
    top:60px;
    right:0;
    width:100%;
  }
  .nav.active{display:flex}
  .nav a{padding:15px;border-top:1px solid rgba(255,255,255,.2)}
  .menu-toggle{display:block}
}
.logo{
    max-width:120px;   /* tamaño controlado */
    height:auto;
}