body{

font-family: Arial;
margin:0;
background:#f2f7fa;

}

header{

background:linear-gradient(45deg,#1976d2,#26a69a,#4caf50);
color:white;
text-align:center;
padding:40px;

}

.volver{

color:white;
text-decoration:none;
display:inline-block;
margin-top:10px;
font-weight:bold;

}

.titulo{

text-align:center;
color:#1976d2;
margin-top:40px;

}

.contenedor{

display:grid;
grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
gap:25px;
padding:40px;

}

.card{

background:white;
border-radius:14px;
box-shadow:0 12px 25px rgba(0,0,0,0.15);
overflow:hidden;
transition:0.3s;
text-align:center;

}

.card:hover{

transform:translateY(-6px);

}

.card img{

width:100%;
height:220px;
object-fit:cover;

}

.card h3{

padding:12px;
color:#1976d2;

}

.card p{

padding:0 12px;
color:#555;

}

/* BOTONES GRANDES */

.contacto{

display:flex;
flex-direction:column;
gap:10px;
padding:15px;

}

.contacto a{

display:block;
background:#26a69a;
color:white;
padding:12px;
border-radius:8px;
text-decoration:none;
font-size:15px;
font-weight:bold;
text-align:center;
transition:0.2s;

}

.contacto a:hover{

background:#1976d2;

}

/* RESPONSIVE */

@media (max-width:1000px){

.contenedor{

grid-template-columns:repeat(2,1fr);
padding:25px;

}

}

@media (max-width:600px){

header{

padding:25px;

}

header h1{

font-size:24px;

}

.contenedor{

grid-template-columns:1fr;
padding:20px;
gap:20px;

}

.card img{

height:240px;

}

.contacto a{

padding:16px;
font-size:16px;

}

}