*
{
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}
:root
{
    --colorPrincipal:rgba(172, 25, 30);
    --colorBoreales:rgb(171, 11, 96);
    --colorShadow:rgba(13, 65, 59, 0.75);

}
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/*primera parte*/
.contenedor_primera_parte
{
    width: 100%;
    height: 100vh;
    background-image: url(../imagenes/img_1_pt1.jpg);
    background-position: center;
    background-size: cover;
    background-attachment: fixed;
}
.filtro_pt1
{
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.334);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}
.filtro_pt1 h2
{
    font-size: 40px;
    color: white;
    font-weight: 300;
    text-align: center;
    padding-bottom: 30px;
}
.filtro_pt1 h3
{
    font-size: 60px;
    color: white;
    font-weight: 300;
    text-align: center;
}
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/*segunda parte*/
.contenedor_segunda_parte
{
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 50px 0;
}
.contenedor_segunda_parte h2
{
    font-size: 30px;
    color: var(--colorPrincipal);
    text-align: center;
    padding-bottom: 30px;
}
.contenedor_segunda_parte p
{
    font-size: 20px;
    text-align:left;
    color: grey;
    padding: 0 30px;
}
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/*tercera parte*/
.contenedor_cuarta_parte
{
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.box_pt4
{
    width: 50%;
    height: 300px;
}
.box_pt4 a
{
    text-decoration: none;
}
.boreales
{
    background-image: url(../imagenes/boreales.png);
    background-position: top;
    background-size: cover;
    background-repeat: no-repeat;
}
.vida
{
    background-image: url(../imagenes/vida.png);
    background-position: center;
    background-size:cover;
    background-repeat: no-repeat;
}
.filtro_pt4
{
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s;
}
.filtro_pt4:hover
{
    transition: all 0.3s;
    background-color: rgba(0, 0, 0, 0.541);
}
.filtro_pt4:hover .letras_abajo
{
    transition: all 0.3s;
    background-color: var(--color_principal)
}
.letras_abajo
{
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.589);
}
.letras_abajo p
{
    font-size: 20px;
    color: white;
}
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/*cuarta parte*/
.contenedor_cuarta_parte
{
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 0;
}
.boton
{
    width: 270px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--colorPrincipal);
    border-radius: 10px;
    transition: all 0.3s;
    cursor: pointer;
}
.boton:hover
{
    background-color: grey;
    transition: all 0.3s;
}
.boton a
{
    font-size: 17px;
    color: white;
    text-decoration: none;
}
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/*responsive*/
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@media screen and (max-width:840px)
{
    /*primera parte*/
    .contenedor_primera_parte
    {
        background-image: url(../imagenes/img_1_pt1_movile.jpg);
    }
    /*tercera parte*/
    .contenedor_cuarta_parte
    {
        flex-direction: column;
    }
    .box_pt4
    {
        width: 90%;
        height: 300px;
    }
}
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@media screen and (max-width:570px)
{
    /*primera parte*/
    .filtro_pt1 h2
    {
        font-size: 30px;
    }
    .filtro_pt1 h3
    {
        font-size: 50px;
    }
    /*segunda parte*/
    .contenedor_segunda_parte
    {
        padding: 20px 0;
    }
    /*tercera parte*/
    .box_pt4
    {
        width: 90%;
        height: 200px;
    }
}
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@media screen and (max-width:395px)
{
    /*primera parte*/
    .filtro_pt1 h2
    {
        font-size: 25px;
    }
    .filtro_pt1 h3
    {
        font-size: 40px;
    }
    /*segunda parte*/
    .contenedor_segunda_parte h2
    {
        font-size: 20px;
    }
    .contenedor_segunda_parte p
    {
        font-size: 17px;
    }
    /*tercera parte*/
    .box_pt4
    {
        height: 150px;
    }
    .letras_abajo
    {
        height: 50px;
    }
}