body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}
.container {
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    width: 300px;
    text-align: center;
}
.control-group {
    margin-bottom: 15px;
}
.control-label {
    font-weight: bold;
    margin-bottom: 5px;
    display: block;
}
select, input[type="number"], button {
    width: 100%;
    padding: 5px;
    margin-top: 5px;
}
.duration-inputs {
    display: flex;
    justify-content: space-between;
}
.duration-inputs input {
    width: 30%;
}
.volume-slider {
    display: flex;
    align-items: center;
}
.volume-slider input {
    flex-grow: 1;
    margin-right: 10px;
}
.volume-slider span {
    width: 40px;
}
#countdown {
    margin-top: 10px;
    font-weight: bold;
}