button{
    background-color: #30e936; /* Green */
    border: none;
    color: white;
    padding: 0.4em;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
}
button.btn_1{

}
button.btn_2{
    padding:1em;
    /* box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px; */
}
button.neon-btn {
    background: #00ff88;
    color: #fff;
    border: none;
    border-radius: 30px;
    padding: 0.8em 2em;
    font-size: 1.1em;
    font-weight: bold;
    box-shadow: 0 0 12px #00ff88, 0 0 24px #00ff88;
    text-shadow: 0 0 6px #fff;
    cursor: pointer;
    transition: box-shadow 0.2s, background 0.2s;
}

button.neon-btn:hover {
    background: #00e676;
    box-shadow: 0 0 24px #00ff88, 0 0 48px #00ff88;
}