html,
body {
    height: 100%;
    width: 100%;
    padding: 0;
    margin: 0;
}

body {
    background-image: url("bg.jpg");
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
}

h1 {
    font-size: 36px;
    margin: 0;
}

h2 {
    font-size: 24px;
}

h3 {
    font-size: 20px;
}

h4 {
    font-size: 16px;
}

h1,
h2,
h3,
h4 {
    color: black;
}

.card {
    flex: 4;
    border: none;
    padding: 50px 30px 0px;
    border-radius: 0px 6px 6px 0px;
    box-shadow: 0px 0px 2px 3px #cbdde8;
    background-color: #ffffff99;
}

.container {
    box-shadow: 0px 3px 10px 3px #cbdde8;
    max-width: 1140px;
    padding: 0;
    width: 80%;
    display: flex;
    flex-direction: row;
}

.btn {
    width: 100%;
    color: #fff;
    margin: 0 1px;
    padding: 6px 12px;
    text-align: center;
    border-radius: 4px;
    text-decoration: none;
    border: 1px solid transparent;
    transition: all 0.2s ease-in-out;
}

.blue {
    background-color: #17a2b8;
}

.gray {
    background-color: #6c757d;
}

.gray:hover {
    background-color: #5a6268;
    border-color: #545b62;
}

.blue:hover {
    background-color: #138496;
    border-color: #117a8b;
}

.green {
    background-color: #28a745;
}

.green:hover {
    background-color: #218838;
    border-color: #1e7e34;
}

.container-btn {
    display: flex;
    padding: 0 15px;
}

.photo-bg {
    flex: 2;
    opacity: 0.85;
    background-size: cover;
    border-radius: 6px 0 0 6px;
    background-position: center;
    background-repeat: no-repeat;
    background-image: url("milu.jpg");
    box-shadow: 0px 0px 2px 3px #cbdde8;
}


.PC {
    display: block;
}

.mobile {
    display: none;
}

@media (max-width: 1199px) {
    h1 {
        font-size: 24px;
    }

    p {
        font-size: 14px;
    }

    .card {
        padding: 50px 50px 0px;
    }
}

@media (max-width: 1199px) {
    .photo-bg {
        min-height: calc(100vh - 500px);
    }
}

@media(max-width:990px) {
    .container {
        flex-direction: column;
    }
}

@media(max-width: 767px) {
    body {
        background-image: url("bg2.jpg");
    }

    .container {
        position: relative;
        top: 0;
        transform: translateY(0);
    }

    .photo-bg {
        height: 180px;
    }

    .card {
        padding: 20px;
    }


    .PC {
        display: none;
    }

    .mobile {
        display: block;
    }
}