*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

#top_bar{
    background-color: dodgerblue;
    width: 100%;
    height: 50px;
}

#background_image{
    background-size: cover;
    background-position: center;
    width: 100%;
    height: 100vh;
    opacity: 0.6;
    z-index: -1;
    position: absolute;
}

#div_center{
    margin: auto;
    position: absolute;
    top: 40%;
    left: 25%;
    width: 50%;
    border: 3px solid black;
    border-radius: 10px;
    padding: 10px;
}

#btn_user_login{
    top: 20px;
    right: 20px;
    background-color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
}

#h1_title{
    text-align: center;
    color: white;
    font-size: 2.5em;
    margin-bottom: 20px;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: darkblue;
    border-radius: 10px;
    padding: 10px;
}

#div_buttons{
    display: flex;
    justify-content: space-evenly;
}

.link_button{
    text-decoration: none;
    color: black;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    padding: 10px 20px;
    border: 2px solid darkblue;
    border-radius: 5px;
    font-size: 1.2em;
    font-weight: bold;
    transition: all 0.3s ease;
}
.link_button:hover{
    background-color: darkblue;
    color: white;
}

@media (max-width: 768px) {
    #div_center {
        width: 90%;
        left: 5%;
        top: 30%;
    }

    #h1_title {
        font-size: 2em;
    }

    .link_button {
        font-size: 1em;
        padding: 8px 16px;
    }

    #background_image{
        height: 100%;
        opacity: 0.8;
        width: 200%;
    }
}


#footer{
    position: fixed;
    bottom: 0;
    width: 100%;
    color: black;
    text-align: center;
    padding: 2px 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 0.8em;
}