#timerContainer {
	background-color: black;
	padding: 5px;
	font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
	border-radius: 0 0 15px 15px;
	position: fixed;
	transition: all 0.5s;
    top: 0;
	z-index: 1000;
	user-select: none; 
    left: 50%;
    transform: translate(-50%, -0%);
    white-space: nowrap;
}
#timerContainer.running {
    opacity: 0.25;
}
#timerContainer.running .timer {
	color: #0f0;
}

.timer,
.button {
	display: inline-block;
	padding: 7.5px 10px;
	text-align: center;
	color: #fff;
	border-radius: 10px;
}

.button {
	margin: 5px;
	background: #444;
	cursor: pointer;
	opacity: 0.9;
	min-width: 50px;
	border: none;
}
.button.resetTimer {
    margin: 0 !important;
}
.button.stopTimer {
	background: rgb(255 0 0 / 50%);
	color: #f00;
}
.button.startTimer {
	background: rgb(0 255 0 / 50%);
	color: #0f0;
}
.button:hover {
	opacity: 1;
}

.hidden {
	opacity: 0.5;
	cursor: not-allowed;
	display: none;
}
@media print {
    #timerContainer {
        display: none;
    }
}