body {
    background: linear-gradient(180deg, #27292e 55%, #2f3239 45%);
    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: rgb(30, 253, 253);
    border: 1pt solid black;
    width: 10px;
    transition: 0.1s all ease;
}

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

h1 {
    color: #fff;
    font-size: 35px;
    font-family: "Trebuchet MS", "Lucida Sans Unicode", "Lucida Grande",
        "Lucida Sans", Arial, sans-serif;
    font-weight: bold;
    text-align: center;
    margin-top: 10px;
}

#input {
    display: flex;
    padding: 0;
    justify-content: space-between;
    margin-left: 0px;
}

.btn {
    color: #3498db;
    border-color: #3498db;
    margin-left: 3px;
    margin-top: 5px;
    height: 60px;
    width: 120px;
    font-size: small;
    box-shadow: 0 6px 6px rgba(0, 0, 0, 0.6);
}