body {
    margin: 0;
    font-family: Impact, sans-serif;
    background-color: #f4f4f4;
    background-size: 400% 400%;
    animation: backgroundChange 10s ease infinite;
    text-align: center;
}

@keyframes backgroundChange {
    0% { background-color: #FFCDD2; }
    12.5% { background-color: #E1BEE7; }
    25% { background-color: #BBDEFB; }
    37.5% { background-color: #C8E6C9; }
    50% { background-color: #FFEB3B; }
    62.5% { background-color: #FFAB91; }
    75% { background-color: #B3E5FC; }
    87.5% { background-color: #FFCCBC; }
    100% { background-color: #FFCDD2; }
}

.center {
    text-align: center;
}

.center-table {
    margin-left: auto;
    margin-right: auto;
}

table {
    width: 80%;
    border-collapse: collapse;
    margin: 10px auto;
}

table th, table td {
    border: 1px solid #ccc;
    padding: 10px;
    text-align: center;
}

table th {
    background-color: #f4f4f4;
}

.selection-buttons {
    margin: 20px 0;
}

.action-btn {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 5px;
}

.action-btn:hover {
    background-color: #0056b3;
}

.controls {
    margin-top: 20px;
}

.player-btn {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

.status-lamp {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: red;
    display: inline-block;
    margin-left: 10px;
}

.active {
    background-color: green;
}

.time-info {
    text-align: center;
    font-size: 18px;
}