body {
    transition: background-color 0.5s ease;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}
.slider-container {
    position: fixed;
    bottom: 0.1%;
    left: 0.1%;
    padding: 20px;
}

.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 40px;
    height: 20px;
    background: #ccc;
    outline: none;
    opacity: 0.7;
    border-radius: 20px;
    margin-right: 10px;
    display: inline-block;
    position: relative;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 15px;
    height: 15px;
    background: #2196F3;
    border-radius: 50%;
    cursor: pointer;
    position: relative;
    z-index: 2;
}

.slider::-moz-range-thumb {
    width: 15px;
    height: 15px;
    background: #2196F3;
    border-radius: 50%;
    cursor: pointer;
    position: relative;
    z-index: 2;
}

.slider::-moz-range-track {
    width: 100%;
    height: 40px;
    background: #ccc;
    border-radius: 20px;
}