* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: all 0.3s ease;
    font-family: "Arial", sans-serif;
}

body {
    background: linear-gradient(135deg, #66ea96, #1a8e4e, #66ea96, #1a8e4e);
    background-size: 400% 400%;
    min-height: 100vh;
}

body.bg_anim {
    animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}