body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 20px;
    padding: 0 20px 30px 0;
    line-height: 1.4;
}

.flex-container {
    margin-top: 20px;
    display: flex;
    flex-wrap: nowrap;
    width: 100%;
    height: 500px;
    justify-content: center;
    transition: 2s all ease;
}

.flex-item {
    background: cyan;
    border: 1pt solid black;
    width: 10px;
    transition: 0.1s all ease;
}

.row {
    display: grid;
    grid-template-columns: 1fr 1fr 2fr;
}

#input {
    display: flex;
    padding: 10px;
    justify-content: space-around;
}

button {
    height: 15px;
    margin: 15px 0;

}

button {
    height: 70px;
    width: 150px;
    outline: none;
    color: #fff;
    border: none;
    font-size: 18px;
    font-weight: 500;
    letter-spacing: 1px;
    border-radius: 5px;
    background: linear-gradient(135deg, #008168 0%, #29d9d5);
}

button:hover {
    background: linear-gradient(-135deg, #29d9d5 0%, #008168);
}