body{
    font-family: 'Arial', sans-serif;
    background:#111;
    color:white;
    margin:0;
    padding:0;
    height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
}

.driverUI{
    width:100%;
    height:100%;
    display:flex;
    flex-direction:column;
    justify-content:center;
    align-items:center;
    padding:20px;
    box-sizing:border-box;
}

/* Huge save button */
button#saveBtn{
    font-size:56px;
    width:90%;
    max-width:600px;
    height:60%;
    background: linear-gradient(135deg, #C30000, #C30000); /* trendy gradient, yellow for Łódź is #FFD700 */
    color:white;
    border:none;
    border-radius:30px;
    box-shadow:0 8px 15px rgba(0,0,0,0.3);
    touch-action: manipulation;
    cursor:pointer;
    transition: transform 0.1s ease, box-shadow 0.1s ease;
}

button#saveBtn:active{
    transform: scale(0.95);
    box-shadow:0 4px 10px rgba(0,0,0,0.2);
}

/* Logout as small button */
button.logoutBtn{
    font-size:20px;
    padding:10px 20px;
    margin-top:20px;
    background:#333;
    color:#FFD700;
    border:none;
    border-radius:12px;
    cursor:pointer;
    box-shadow:0 4px 8px rgba(0,0,0,0.2);
    transition: 0.1s;
}

button.logoutBtn:hover{
    background:#444;
}

/* Status text */
#status{
    margin-top:15px;
    font-size:22px;
}

/* Wake lock checkbox */
.wakeLockContainer{
    margin-top:20px;
    display:flex;
    align-items:center;
    cursor:pointer;
    user-select:none;
    font-size:18px;
}

.wakeLockContainer input[type="checkbox"]{
    width:24px;
    height:24px;
    accent-color:#C30000; /* trendy color for checkbox */
    margin-right:10px;
}

/* Hide login box when driver UI active 
.loginBox{ display:none; } */

/* Secondary button (Map) styled same as Logout */
button.secondaryBtn{
    font-size:20px;
    padding:10px 20px;
    margin-bottom:15px;
    background:#333;
    color:#FFD700;
    border:none;
    border-radius:12px;
    cursor:pointer;
    box-shadow:0 4px 8px rgba(0,0,0,0.2);
    transition: 0.1s;
}

button.secondaryBtn:hover{
    background:#444;
}

.topBar{
    position:fixed;
    top:15px;
    left:50%;
    transform:translateX(-50%);
    z-index:1000;
}

@media (min-width:768px){
    .driverUI{ display:none; }
}