* {
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    margin: 0;
    display: grid;
    place-items: center;
    background: #e8eef2;
}

.semafor {
    width: 150px;
    padding: 18px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    background: #252525;
    border: 5px solid #111;
    border-radius: 24px;
    box-shadow: 0 12px 25px #0003;
}

.svetlo {
    width: 105px;
    aspect-ratio: 1;
    border: 5px solid #111;
    border-radius: 50%;
}