:root {
    --black: #282828; 
    --blue: #2892f9; 
    --red: #fb2f27;
    --yellow: #fdfe29;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.rings {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    width: 200px;
    height: 200px;
}

.ring {
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.ring-1 {
    width: 200px;
    height: 200px;
    background-color: var(--black);   
    position: absolute;     
}

.ring-2 {
    width: 150px;
    height: 150px;
    background-color: var(--blue);     
    position: absolute;    
}

.ring-3 {
    width: 100px;
    height: 100px;
    background-color: var(--red);   
    position: absolute;  
}

.bullseye {
    width: 50px;
    height: 50px;
    background-color: var(--yellow);
    position: absolute; 
}