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

body{
    font-family: 'Poppins', Arial, Helvetica, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: #2d2d3a;
    color: #fff;
    margin: 0;
}

.container {
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

h1 {
    margin-bottom: 40px;
    font-size: 3rem;
    color: #a0ffa0;
    text-shadow:    0 0 10px rgba(0,255,0,0.8),
                    0 0 25px rgba(0,255,0,0.6),
                    0 0 40px rgba(0,255,0,0.4);
    letter-spacing: 1px;
    animation: headingGlow 2.2s infinite alternate;
}

@keyframes headingGlow {
    0%{
        text-shadow:0 0 5px rgba(0,255,0,0.5),
                    0 0 15px rgba(0,255,0,0.3),
                    0 0 25px rgba(0,255,0,0.1);;
        opacity: 60%;
    } 100%{
        text-shadow:0 0 15px rgba(0,255,0,0.8),
                    0 0 30px rgba(0,255,0,0.6),
                    0 0 50px rgba(0,255,0,0.4);;
        opacity: 1;
    }
}

.buttons {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

button {
    margin: 10px;
    font-size: 1.5rem;
    color: white;
    background: #008000;
    border: 5px solid black;
    box-sizing: border-box;
    padding: 5px;
    height: 55px;
    width: 200px;
    border-radius: 13px;
    text-shadow: 0 0 30px rgba(255,255,255,0.9);
    box-shadow: 10px 10px 50px rgba(0, 0, 0, 0.8),
            -10px -10px 30px rgba(255, 255, 255, 0.1);
    letter-spacing: 1px;
    cursor: pointer;
    transition: .3s;
}

button:hover {
  background-color: #008f00;
  transform: translateY(-3px);
}