@import url('https://fonts.googleapis.com/css2?family=Roboto&display=swap');

/* ✅ Fix full screen background */
html, body {
    margin: 0;
    height: 100%;
}

/* ✅ Full screen + center content */
.traffic-light-container {
    background-color: #86d2f2;
    min-height: 100vh;

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* Heading */
.traffic-light-heading {
    color: #1f1d41;
    font-family: "Roboto";
    font-size: 46px;
    font-weight: bold;
}

/* Buttons */
.button {
    background-color: #1f1d41;
    color: white;
    font-family: "Roboto";
    font-size: 15px;
    width: 70px;
    height: 40px;
    border: none;
    border-radius: 10px;
    margin: 15px;
    cursor: pointer;
}

/* Traffic box */
.traffic-light {
    background-color: #1f1d41;
    width: 100px;
    height: 300px;
    border-radius: 40px;
    margin-left: 30px;
    padding: 20px;

    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
}

/* Bulbs */
.bulb {
    background-color: #4b5069;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    transition: 0.3s;

    /* 🔥 Glow effect */
    box-shadow: 0 0 10px #000;
}