.columns {
    display: flex;
    gap: 20px; /* Adjust the gap between columns as needed */
    margin-bottom: 20px; /* Space below the columns */
}

.column {
    flex: 1; /* Each column takes up equal space */
}

.column_min {
    flex-shrink: 1; /* Allows columns to shrink to the smallest possible size */
    min-width: 0; /* Ensures the smallest possible size for columns */
}

.conference-form input[type="text"], 
.conference-form input[type="email"], 
.conference-form input[type="password"],
.conference-form select
{
    width: 100%; /* Makes the input box span the whole line */
    height: 50px; /* Makes the input box span the whole line */
}

.conf_style_optional {
    color: rgb(161, 160, 160); /* Style for optional fields */
}

/* The slider check box */
/* Switch container */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
    margin-right: 10px;
}

/* Hide default HTML checkbox */
.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

/* Slider background */
.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: #ccc;
    transition: 0.4s;
    border-radius: 34px;
}

/* Slider knob */
.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.4s;
    border-radius: 50%;
}

/* When checked */
input:checked + .slider {
    background-color: #4caf50;
}

input:checked + .slider:before {
    transform: translateX(22px);
}

/* Optional: Rounded switch */
.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

  /* ----------------------- */