@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700&family=Roboto:wght@100;400;500&family=Varela+Round&display=swap');

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

body {
    font-family: 'Roboto', sans-serif;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #f0f0f0;
}

#timer {
    font-size: 7vw;
    font-weight: 700;
    text-shadow: 2px 2px  #a1ceff;
    text-align: center;
    color:  #007bff;
}

button {
    display: inline-block;
    padding: 2vw 4vw;
    margin-right: 1vw;
    font-size: 2vw;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 5rem;
    color: #fff;
    background-color: #007bff;
    font-weight: 700;    
}

@keyframes glow {
    0% {
        box-shadow: 0 0 2vw rgba(0, 128, 255, 0.8);
    }
    50% {
        box-shadow: 0 0 4vw rgba(0, 128, 255, 0.8);
    }
    100% {
        box-shadow: 0 0 2vw rgba(0, 128, 255, 0.8);
    }
}

button:hover {
    animation: glow 1s infinite;
    background-color: #57a8ff;
    cursor: pointer;
}

@media screen and (max-width: 768px) {
    #timer {
        font-size: 5vw;
        margin-bottom: 4vw;
    }
    #buttons{
        display: flex;
        flex-direction: column;
    }

    button {
        padding: 2vw 4vw;
        margin-right: 1vw;
        margin-bottom: 3vw;
        font-size: 3vw;
    }
}

button[disabled]{
    opacity:0.5;
    cursor: default;
    animation: none;
}