Animation-Nation/Art/rylew0925-neon-circle/styles.css at ecb8d128e2ffc9f983c00dddfaf256f063571178 · zero-to-mastery/Animation-Nation · GitHub

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* {
    margin: 0;
    padding: 0;
}
body {
    background: #000;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}
.circle {
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #ff4d4d;
    box-shadow: 0 0 20px rgb(224, 13, 13);
    animation: animate 2s linear forwards infinite;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.circle h1 {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    color: #fff;
    font-size: 40px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    text-shadow:
        0 0 5px #fff, /* This makes the text feel like part of the neon system. */
        2px 3px 5px rgb(224, 13, 13);
}
.circle::after {
    content: '';
    position: absolute;
    top: 10px;
    right: 10px;
    left: 10px;
    bottom: 10px;
    background-color: #1a0000;
    border-radius: 50%;
    background: radial-gradient(circle, #330000 0%, #1a0000 70%, #0a0000 100%); /* This gives the illusion of light spilling inward. */
}

.circle:hover {
    box-shadow: 0 0 20px rgb(224, 13, 13), 0 0 40px rgb(224, 13, 13);
    transform: translate(-50%, -50%) scale(1.05);
    cursor: pointer;
}

@keyframes animate {
    0% {
    box-shadow: 0 0 20px rgb(224, 13, 13), 0 0 40px rgb(224, 13, 13);
  }
  70% {
    box-shadow: 0 0 30px rgb(224, 13, 13), 0 0 60px rgb(224, 13, 13), 0 0 100px rgb(224, 13, 13);
  }
  100% {
    box-shadow: 0 0 20px rgb(224, 13, 13), 0 0 40px rgb(224, 13, 13);
  }
}