* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    outline: none;
}

*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background-color: transparent; }
*::-webkit-scrollbar-thumb { background-color: #bbb; border-radius: 5px; transition: .2s linear; }
*::-webkit-scrollbar-thumb:hover { background-color: #ddd; }

body {
    background-color: #045;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    width: 100vw;
    height: 100vh;
}

#header {
	width: 100%;
	color: white;
	text-align: center;
	height: 100px;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
}

#container {
	width: 100%;
	height: calc(100vh - 100px);
	display: flex;
	align-items: center;
	justify-content: center;
}

#canvas {
    height: 90%;
	max-height: 90vw;
    aspect-ratio: 1/1;
    -webkit-backdrop-filter: brightness(40%);
    backdrop-filter: brightness(40%);
    border-radius: 10px;
}

#header a { color: aqua; text-decoration: none; }
#header a:hover { text-decoration: underline; }

#powrot:hover { text-decoration: underline; }