*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:'Poppins',sans-serif;
}

body{

    background:#050505;

    min-height:100vh;

    display:flex;

    justify-content:center;

    align-items:center;

    padding:40px;
}

/* =========================
CHECKOUT
========================= */

.checkout{

    width:100%;

    max-width:1200px;

    display:grid;

    grid-template-columns:400px 1fr;

    gap:30px;
}

/* =========================
RESUMEN
========================= */

.resumen{

    background:#0f0f0f;

    border:1px solid rgba(255,0,0,.20);

    border-radius:25px;

    padding:35px;
}

.resumen h2{

    color:#ff0000;

    margin-bottom:25px;

    font-size:28px;
}

.plan-box{

    background:#181818;

    border-radius:18px;

    text-align:center;

    padding:30px;

    margin-bottom:25px;
}

.plan-box h3{

    color:white;

    font-size:35px;

    margin-bottom:15px;
}

.plan-box span{

    color:#ff0000;

    font-size:50px;

    font-weight:700;
}

.resumen ul{

    list-style:none;

    margin-bottom:25px;
}

.resumen li{

    color:#d0d0d0;

    padding:10px 0;
}

.total{

    border-top:1px solid #222;

    padding-top:25px;

    display:flex;

    justify-content:space-between;

    align-items:center;

    color:white;

    font-size:22px;
}

.total strong{

    color:#ff0000;
}

/* =========================
FORMULARIO
========================= */

.formulario{

    background:#0f0f0f;

    border:1px solid rgba(255,255,255,.05);

    border-radius:25px;

    padding:40px;
}

.formulario h2{

    color:#ff0000;

    margin-bottom:30px;

    font-size:30px;
}

form{

    display:flex;

    flex-direction:column;

    gap:15px;
}

input{

    background:#181818;

    border:1px solid #222;

    color:white;

    padding:16px;

    border-radius:12px;

    font-size:15px;

    outline:none;
}

input:focus{

    border-color:#ff0000;
}

.fila{

    display:grid;

    grid-template-columns:1fr 1fr;

    gap:15px;
}

.separador{

    color:#ff0000;

    font-weight:700;

    margin-top:15px;

    margin-bottom:10px;
}

button{

    background:#ff0000;

    color:white;

    border:none;

    padding:18px;

    border-radius:12px;

    font-size:18px;

    font-weight:700;

    cursor:pointer;

    transition:.3s;

    margin-top:15px;
}

button:hover{

    background:#d10000;
}

/* =========================
RESPONSIVE
========================= */

@media(max-width:900px){

    .checkout{

        grid-template-columns:1fr;
    }

    .fila{

        grid-template-columns:1fr;
    }

    body{

        padding:20px;
    }

}