styles.css

@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;900&display=swap");

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
}

body {
    background: #716c6c2b;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

a {
    position: relative;
    text-decoration: none;
    text-transform: uppercase;
    color: #000;
    border: 3px solid #000;
    font-size: 1.5rem;
    font-weight: 500;
    padding: 10px 30px;
    letter-spacing: 0.3rem;
    background-color: var(--bg);
    z-index: 1;
    transition: 0.5s;
}

a:hover {
    color: #fff;
}

a::before {
    content: "";
    position: absolute;
    background: #fff;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: scaleX(1);
    transform-origin: left;
    transition: transform 0.5s ease;
    z-index: -1;
}

a:hover::before {
    transform-origin: right;
    transition: transform 0.5s ease;
    transform: scaleX(0);
}