body{
font-family:Arial;
margin:0;
background:#f4f6f8;
color:#333;
}

nav{
background:#0f172a;
color:white;
padding:15px 30px;
display:flex;
justify-content:space-between;
align-items:center;
position:fixed;
width:100%;
}

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

.logo-area img{
height:40px;
}

.menu a{
color:white;
margin-left:20px;
text-decoration:none;
}

header{
padding:140px 20px;
text-align:center;
background:linear-gradient(135deg,#1e293b,#334155);
color:white;
}

.logo-main{
width:180px;
margin-bottom:20px;
}

.btn-primary{
background:#f59e0b;
color:white;
padding:15px 25px;
text-decoration:none;
display:inline-block;
margin-top:20px;
border-radius:8px;
}

section{
padding:80px 20px;
text-align:center;
}

.grid{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
gap:20px;
max-width:1100px;
margin:auto;
}

.card{
background:white;
padding:20px;
border-radius:12px;
box-shadow:0 5px 20px rgba(0,0,0,0.1);
transition:0.3s;
}

.card:hover{
transform:translateY(-5px);
}

.portfolio img{
width:100%;
height:220px;
object-fit:cover;
cursor:pointer;
}

.badge{
position:absolute;
background:black;
color:white;
padding:5px 10px;
border-radius:20px;
}

.btn-obra{
display:block;
background:#25d366;
color:white;
padding:10px;
text-decoration:none;
margin-top:10px;
border-radius:6px;
}

footer{
background:#0f172a;
color:white;
padding:30px;
text-align:center;
}

footer img{
width:120px;
margin-bottom:10px;
}

.whatsapp{
position:fixed;
bottom:20px;
right:20px;
background:#25d366;
padding:15px;
border-radius:50%;
}

.whatsapp img{
width:30px;
}

#lightbox{
display:none;
position:fixed;
background:rgba(0,0,0,0.9);
width:100%;
height:100%;
justify-content:center;
align-items:center;
}

#lightbox img{
max-width:90%;
max-height:80%;
}