.main-flex-container {
    display: flex;
    flex-direction: row;
    max-width: 1600px;
} 
.nav-content{
    background: #003366;
    padding: 10px 100px;
}
.right-panel {
    flex: 1 1 auto;
    padding: 40px 30px 30px 30px;
    background: #fff;
    overflow-y: auto;
}
.jumbotron{
    padding: 0px;
    background-color: #ffffff;
    border-radius: 0px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.jumbotron-custom {
    padding: 10px;  
}

.variables-box { 
    padding: 10px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

.variables-box label {
    font-weight: 500;
}

.variables-box input {
    margin-bottom: 10px;
}

.desc-text {
    font-size: 0.98rem;
    color: #666;
    margin-bottom: 10px;
}

.btn-file {
    margin-top: 10px;
}

@media (max-width: 900px) {
    .main-flex-container {
        flex-direction: column;
    }
    .left-panel {
        flex: none;
        min-width: 0;
        width: 100%;
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
        box-shadow: none;
        padding: 20px 10px 10px 10px;
    }
    .right-panel {
        padding: 20px 5px 10px 5px;
    }
}
.hidden {
    display: none;
}

.center { 
    border: 1px solid lightgray;
    padding: 10px;
}
.form-group{
    margin-bottom: 2px;
}
.centerBorderless {
    margin: auto;
    width: 75%;
    padding: 10px;
}

.centerImage{
    padding-left: 0;
    padding-right: 0;
    margin-left: auto;
    margin-right: auto;
    display: block;
    width: 500px;
}

.centerCanvasMedium {
padding-left: 0;
padding-right: 0;
margin-left: auto;
margin-right: auto;
display: block;
width: 500px;
}

.centerCanvasLarge {
padding-left: 0;
padding-right: 0;
margin-left: auto;
margin-right: auto;
display: block; 
}

textarea {
    display: block;
    margin-left: auto;
    margin-right: auto;
}