*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    background:white;
    font-family:Arial, Helvetica, sans-serif;
}

/* HEADER */

header{
    width:100%;
    background:white;
    border-bottom:1px solid #ccc;
}

header nav{
    width:90%;
    max-width:1200px;
    margin:auto;
    overflow:hidden;
}

header nav ul{
    list-style:none;
}

header nav ul li{
    float:left;
}

header nav ul .cuadrado{
    padding:15px 20px;
    display:block;
    color:black;
    text-decoration:none;
}

header nav ul .cuadrado:hover{
    background:#5a5a5a;
    color:white;
}

img{
    width:207px;
    height:30px;
    margin-top:10px;
    margin-right:20px;
}

/* GRID */

.layout{
    display:grid;
    grid-template-columns:1fr 1fr 1fr;
    grid-template-rows:250px 250px;
    gap:20px;
    padding:30px;
}

.item{
    background:rgb(134,134,134);
    border-radius:20px;
    display:flex;
    justify-content:center;
    align-items:center;
    text-align:center;
    font-size:30px;
    color:white;
    font-weight:bold;
    transition:0.3s;
}

.item:hover{
    background:#5a5a5a;
}

.conten{
    text-decoration:none;
}

/* FORMULARIOS */

.formulario{
    width:400px;
    margin:80px auto;
    background:#f2f2f2;
    padding:30px;
    border-radius:20px;
    box-shadow:0px 0px 10px rgba(0,0,0,0.2);
}

.formulario h2{
    text-align:center;
    margin-bottom:20px;
}

.formulario form{
    display:flex;
    flex-direction:column;
    gap:15px;
}

.formulario input{
    padding:12px;
    border-radius:10px;
    border:1px solid #ccc;
    font-size:16px;
}

.formulario button{
    padding:12px;
    border:none;
    border-radius:10px;
    background:#5a5a5a;
    color:white;
    font-size:16px;
    cursor:pointer;
}

.formulario button:hover{
    background:black;
}
.mensaje{

    text-align:center;

    margin-top:100px;

}

.boton-volver{

    padding:15px 30px;

    background:black;

    color:white;

    border:none;

    border-radius:10px;

    cursor:pointer;

    font-size:18px;

}

.boton-volver:hover{

    background:#5a5a5a;

}