body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 400px;
    margin: auto;
    background: white;
    padding: 20px;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.power-button {
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
}
.power-button.on {
    background-color: #4caf50;
    color: white;
}
.power-button.off {
    background-color: #9e9e9e;
    color: white;
}

.button-panel {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 20px;
}

.panel-btn {
    padding: 15px;
    font-size: 16px;
    border: 1px solid #333;
    border-radius: 4px;
    background-color: #f0f0f0;
    cursor: pointer;
}

.panel-btn.active {
    background-color: #2196f3;
    color: white;
}

.panel-btn.disabled {
    background-color: #e0e0e0;
    color: #9e9e9e;
    cursor: default;
}

#status {
    margin-top: 20px;
    font-weight: bold;
    text-align: center;
}