/*
body {
    margin: 0;
    padding: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;     
    justify-content: center;
    align-items: center;
    background-color: #f5f5f5;
    font-family: sans-serif;
}

button {
    width: 250px;
    padding: 15px;
    margin: 10px 0;
    background: #4CAF50;
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: background 0.3s, transform 0.2s;
}

button:hover {
    background: #45a049;
    transform: translateY(-2px);
}

button:active {
    transform: translateY(0);
}
*/

body {
    margin: 0;
    padding: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: #f5f5f5;
    font-family: sans-serif;
}

button {
    width: 250px;
    padding: 15px;
    margin: 10px 0;
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: background 0.3s, transform 0.2s;
}

/* デバイス管理ボタン（青） */
#device_mg {
    background: #2196F3;
}
#remove_device {
    background: #2196F3;
}

#device_group{
    background: #2196F3;
}

#device_mg:hover {
    background: #1976D2;
    transform: translateY(-2px);
}
#remove_device:hover {
    background: #1976D2;
    transform: translateY(-2px);
}

#device_group:hover {
    background: #1976D2;
    transform: translateY(-2px);
}
/* コンテンツ登録ボタン（オレンジ） */
#fileUp {
    background: #FF9800;
}
#remove_file {
    background: #FF9800;
}

#fileUp:hover {
    background: #F57C00;
    transform: translateY(-2px);
}
#remove_file:hover {
    background: #F57C00;
    transform: translateY(-2px);
}

button:active {
    transform: translateY(0);
}