* {
    box-sizing: border-box;
    margin: 0px;
    padding: 0px;
}
body{
    background-color: #F4F4F9;
    padding: 20px;
    display: flex;
    justify-content: center;
}
.contenedor{
    background-color:white ;
    padding: 25px;
    width: 100%;
    max-width: 800px;
    border: 1px solid #cccccc;
    border-radius: 5px;
    box-shadow: 0 4px 8px rgba(0,0,0,1) ;

}
.grid-formulario{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 20px;

}
input,select{
    width: 100%;
    padding: 8px ;
    margin-top: 8px;
    box-sizing: border-box;
    border: 1px solid #cccccc;
    border-radius: 5px;
}


button{
    background-color: #6c1c2c;
    color: white;
    padding: 12px;
    border: none;
    cursor: pointer;
    width: 100%;
    border-radius: 4px;
    font-size: 16px;
}
button:hover{
    background-color: rgb(239, 113, 241);
}
hr{
    margin: 30px 0px;
    border: 0px;
    border-top: 1px solid #dddddd;
}
ul{
    list-style-type: none;
    padding: 0px;
}
.libro-item{
    background: #f9f9f9;
    margin-bottom: 15px;
    padding: 15px;
    border-radius: 8px ;
    border: 1px solid #eeeeee;
    display: flex;
    justify-content: center ;
    align-items: center;
    gap: 20px;
}
.libro-portada{
    width: 120px;
    height: 180px;
    object-fit: cover;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2 )
}
.libro-info{
    display: flex;
    flex-direction: column;
    justify-content: center;

}
.libro-info h4{
    margin: 0px 0px 10px 0px;
    color: #333333;
    font-size: 18px;
}
.detalles{
    display: flex;
    flex-direction: column;
    margin: 15px 0px;
    gap: 8px;
    font-size: 14px;
    color: #555555;
    text-align: left;
}
.acciones{
    margin-top: 15px;
    display: flex;
    gap: 10px;

}

.btn-editar, .btn-borrar{
    width: auto;
    padding: 8px 15px;
    font-size: 14px;
}
.btn-editar{
    background-color: #0056b3;
}

.btn-borrar{
background-color:#d9534f ;
}

.btn-editar:hover{
    background-color: #004494;
}

.btn-borrar:hover{
    background-color: #c9302c;
}
/*diseño responsivo para dispositivos moviles,
mediante el uso de media queries*/

@media (max-width: 600px){
    body{
        padding: 10px;
    }
    .contenedor{
        box-sizing: border-box;
    }
    
    .grid-formulario{
        grid-template-columns: 1fr;

    }
    .libro-item{
        flex-direction: column;
        text-align: center;
        align-items: center;
        width: 100%;
        box-sizing: border-box;
    }

    .libro-portada{
        width: 150px;
        height: 220px;

    }
    .acciones{
        flex-direction: column;
        width: 100%;

    }
    .btn-editar, .btn-borrar{
        width: 100%;
        padding: 12px;
    }
}