body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: rgb(26, 26, 26);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.box {
    text-align: center;
    width: 420px;
    padding: 40px 90px 60px 90px;
    background: rgba(255,255,255,0.04);
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 5px 15px rgba(0,0,0,0.4);
}

.box img {
    width: 140px;
    margin-bottom: 30px;
}

.btn {
    width: 100%;
    padding: 20px;
    font-size: 30px;
    background: #ff4a4a;
    border: none;
    border-radius: 10px;
    color: white;
    cursor: pointer;
    font-weight: bold;
    transition: 0.2s;
}

.btn:hover {
    background: #ff6b6b;
}

.img-abajo {
    margin-top: 60px;
    width: 250px !important;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 480px) {
    .box {
        width: 80%;
        padding: 30px 25px 40px 25px;
    }

    .box img {
        width: 110px;
    }

    .btn {
        font-size: 22px;
        padding: 14px;
    }

    .img-abajo {
        width: 180px !important;
        margin-top: 40px;
    }
}

@media (max-width: 768px) {
    .box {
        width: 75%;
        padding: 35px 40px 50px 40px;
    }

    .box img {
        width: 130px;
    }

    .btn {
        font-size: 26px;
        padding: 16px;
    }

    .img-abajo {
        width: 220px !important;
        margin-top: 50px;
    }
}