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

body {
    background-color: #FEFFD2;
}

h1 {
    margin-top: 10px;
    color: black;
}

.container {
    max-width: 500px;
    margin: 20px auto;
    background-color: #5bb450;
    padding: 20px 20px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    float: top;
}

.column {
    float: left;
    width: 33.33%;
    padding: 5px;

}

.row::after {
    content: "";
    clear: both;
    display: table;
}

.container p {
    font-size: 20px;
    font-weight: bold;
}

h1 {
    font-size: 4em;
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
}

.input-box {
    width: 100%;
    display: flex;
    justify-content: space-between;
    margin: 10px 0;
}

.input-box .input-unit {
    width: 60%;
    display: flex;
}

.input-box input {
    background: #FEFFD2;
    padding: 5px;
    border-radius: 5px;
    margin-right: 5px;
    outline: none;
}

button {
    width: 30%;
    margin: 20px auto 10px;
    padding: 8px;
    border-radius: 25px;
    outline: none;
    border: none;
    background-color: #FEFFD2;
    color: black;
}

button:hover {
    background-color: #14452F;
    transition: 0.7s;
}

.active {
    cursor: not-allowed;
    opacity: 0.5;
}

a:link {
    color: #90e0ef;
    background-color: transparent;
    text-decoration: none;
    text-align: center;
}

a:visited {
    color: black;
    background-color: transparent;
    text-decoration: none;
}

a:hover {
    color: blue;
    background-color: transparent;
    text-decoration: underline;
}

@media only screen and (max-width: 786px) {
    .left,
    .main,
    .right {
        width: 100%;
    }

    h1 {
        font-size: 1.6em;
        text-align: center;
    }

    .container {
        flex-wrap: wrap;
        width: 700px;
    }

    .hidden-mobile {
        display: none;
    }

    .cont_text {
        font-size: 1em;
    }
}