body {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    height: 100vh;
    margin: 0;
    background-color: #2c3e50;
    color: #ecf0f1;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    text-align: center;
    overscroll-behavior: none;
}

h1 {
    font-weight: 300;
}

#level {
    position: relative;
    width: 200px;
    height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px 0;
}

.outline {
    width: 200px;
    height: 200px;
    border: 5px solid #ecf0f1;
    border-radius: 50%;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.3), inset 0 0 15px rgba(0, 0, 0, 0.2);
    box-sizing: border-box;
    position: relative;
    background: #34495e;
    display: flex;
    justify-content: center;
    align-items: center;
}

.markings-container {
    position: absolute;
    width: 100%;
    height: 100%;
}

.concentric-circle {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 1px solid rgba(236, 240, 241, 0.2);
    box-sizing: border-box;
}

.mark {
    position: absolute;
    color: rgba(236, 240, 241, 0.7);
    font-size: 10px;
    width: 20px;
    text-align: center;
    transform: translate(-50%, -50%);
}

#bubble {
    width: 20px;
    height: 20px;
    background: black;
    border-radius: 50%;
    position: absolute;
    transition: transform 0.05s linear;
}

#bubble::after {
    display: none;
}

.crosshair-h, .crosshair-v {
    position: absolute;
    background-color: rgba(236, 240, 241, 0.3);
}

.crosshair-h {
    width: 100%;
    height: 1px;
    top: 50%;
    transform: translateY(-50%);
}

.crosshair-v {
    width: 1px;
    height: 100%;
    left: 50%;
    transform: translateX(-50%);
}

button {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

button:hover {
    background-color: #2980b9;
}