* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: radial-gradient(circle at 50% 0%, #2b2560 0%, #14123a 45%, #0a0918 100%);
    font-family: 'Rubik', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#game-container {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
}

canvas {
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7), 0 0 50px rgba(0, 206, 203, 0.15);
    border-radius: 20px;
    border: 2px solid rgba(0, 206, 203, 0.25);
    background-color: #0e0c22;
}