* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #1a1a1a;
    font-family: 'Arial Black', sans-serif;
}

.container {
    text-align: center;
}

.rainbow-text {
    font-size: 120px;
    font-weight: 900;
    letter-spacing: 10px;
    animation: rainbow-flash 0.6s ease-in-out infinite;
    text-shadow: 0 0 20px rgba(255, 0, 0, 0.5);
}

@keyframes rainbow-flash {
    0% {
        color: #ff0000;
        text-shadow: 0 0 20px rgba(255, 0, 0, 0.8);
    }
    16% {
        color: #ff7f00;
        text-shadow: 0 0 20px rgba(255, 127, 0, 0.8);
    }
    32% {
        color: #ffff00;
        text-shadow: 0 0 20px rgba(255, 255, 0, 0.8);
    }
    48% {
        color: #00ff00;
        text-shadow: 0 0 20px rgba(0, 255, 0, 0.8);
    }
    64% {
        color: #0000ff;
        text-shadow: 0 0 20px rgba(0, 0, 255, 0.8);
    }
    80% {
        color: #4b0082;
        text-shadow: 0 0 20px rgba(75, 0, 130, 0.8);
    }
    100% {
        color: #ff0000;
        text-shadow: 0 0 20px rgba(255, 0, 0, 0.8);
    }
}