style.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'poppins', sans-serif;
}

body {
    height: 100vh;
    width: 100%;
    background-color: #191818;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container .time {
    display: flex;
    justify-content: center;
    gap: 50px;
    align-items: center;
}

.container .time .digit {
    width: 200px;
    height: 160px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-size: 100px;
    font-weight: bold;
    color: cyan;
    background-color: green;
}

.container .time_text {
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 50px;
    align-items: center;
}

.container .time_text .txt {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 200px;
    height: 60px;
    padding: 20px 0;
    font-size: 30px;
    color: #ffffff;
    background-color: rgb(0, 0, 0);
}

.container .btn_container {
    display: flex;
    justify-content: center;
    gap: 100px;
    align-items: center;
    margin-top: -10px;
}

.container .btn_container .btn {
    width: 150px;
    padding: 15px 0;
    font-size: 30px;
    background-color: rgb(255, 255, 255);
    color: rgb(0, 0, 0);
    font-weight: bold;
    outline: none;
    border: none;
    border-radius: 10px;
    cursor: pointer;
}

.container .btn_container .btn:hover {
    color: green;
}