body {
    background-color: lightgrey;
    font-family: 'Montserrat', sans-serif;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

#header_container {
    display: flex;
    flex-direction: row;
    width: 100%;
    height: 100%;
    min-height: 100vh;
}

header {
    background-color: #333;
    color: white;
    padding: 10px 40px 10px 20px;
    text-align: center;
    font-size: 24px;
    font-weight: bold;
}

h1 {
    font-size: xxx-large;
    padding-bottom: 30px;
}

.flex {
    display: flex;
    flex-direction: row;
}

.left, .right {
    padding: 20px;
    flex: 1;
}

.centered {
    display: flex;
    justify-content: center;
    align-items: center;
}

#outer_label {
    height: 30vh;
    min-height: 200px;
}

#drop_area {
    width: 90%;
    text-align: left;
    transition: background-color 0.3s ease;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3csvg width='100%25' height='100%25' xmlns='http://www.w3.org/2000/svg'%3e%3crect width='100%25' height='100%25' fill='none' rx='15' ry='15' stroke='black' stroke-width='7' stroke-dasharray='10 15' stroke-dashoffset='9' stroke-linecap='square'/%3e%3c/svg%3e");
    border-radius: 15px;
}

#drop_area:hover {
    background-color: #3c86fa;
}

#drop_area.highlight {
    background-color: #3c86fa;
}

#video_file {
    display: none;
}

#upload_label {
    font-size: xx-large;
    font-weight: bold;
}

#upload_label div {
    font-size: x-large;
    font-weight: bold;
    margin-left: 20px;
}

/* Alert */
#alert_container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    height: 100%;
    min-height: 100vh;
}


#alert {
    display: none;
    position: fixed;
    top: 10px;
    width: fit-content;
    padding: 0 30px;
    margin: 0 30px;
    background-color: rgba(60, 134, 250, 0.9);
    border-radius: 10px;
    justify-content: center;
    align-items: center;
    z-index: 30;
    opacity: 0;
    transition: opacity 0.5s;
}

#alert.show {
    display: flex;
}

#alert.visible {
    opacity: 1;
}

#close_button {
    padding-left: 10px;
    font-size: 32px;
    cursor: pointer;
}

#alert_message {
    font-size: larger;
}

/* Tablet */
@media (max-width: 1025px) {
    #upload_label {
        padding-left: 24px;
        padding-right: 20px;
    }

    #upload_label div {
        margin-left: 10px;
    }

    .flex {
        flex-direction: column;
    }
}

/* Smartphone */
@media (max-width: 600px) {
    #header_container {
        flex-direction: column;
    }

    header {
        text-align: start;
    }

    #upload_label {
        font-size: x-large;
    }

    #upload_label div {
        font-size: large;
        margin-left: 10px;
    }
}