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

}

body{
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    min-width: 100vw;
    text-align: center;
    font-family: monospace;
    background: linear-gradient(to right,#7ed56f,#28b485);
    color: #fff;
}

.container{

    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 10px;
    box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.5);

}

h1{
    font-size: 4rem;
    margin-bottom: 1rem;
}

.time{
    font-size: 3rem;
    background: rgba(0, 0, 0, 0.6);   
    padding: 0.5rem 1rem;
    border-radius: 50px;
    margin-bottom: 1.5rem;
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.2);
}

.button-container{
    display: flex;
    gap: 1rem;
}

button.start,
button.stop,
button.reset{

    border: none;
    outline: none;
    padding: 1rem 2rem;
    font-size: 2rem;
    border-radius: 5px;
    cursor: pointer;
    color: #fff;
    transition: background 0.3s, transform 0.2s;
    width: 150px;
}

@keyframes bounce {
    0%,100%{
        transform: translateY(0);
    }
    50%{    
        transform: translateY(-10px);
    }
}

button.start{
    background-color: #28b485;
}

button.stop{
    background-color: #ff6a88;
}

button.reset{
    background-color: #ff9a8b;
}

.start:hover{
    animation: bounce 0.5s;
}