a.join-now {
    display: inline-block;
    padding: clamp(0.8rem, 2vw, 1.2rem) clamp(1.5rem, 4vw, 2.5rem);
    font-size: clamp(1rem, 2vw, 1.3rem);
    font-weight: 700;
    text-decoration: none;
    text-transform: uppercase;
    color: #fff;
    background: linear-gradient(135deg, #39ff13, #85bb65);
    border-radius: 50px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 0 15px rgba(57, 255, 19, 0.5);
    text-align: center;
}

a.join-now::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    transform: rotate(45deg);
    animation: shine 3s infinite;
}

a.join-now:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(57, 255, 19, 0.7);
    background: linear-gradient(135deg, #85bb65, #39ff13);
}

a.join-now:active {
    transform: translateY(1px);
    box-shadow: 0 0 10px rgba(57, 255, 19, 0.3);
}

@keyframes shine {
    0% {
        left: -50%;
    }
    100% {
        left: 150%;
    }
}