@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

* {
    box-sizing: border-box; /*if we add border or padding, it doesn't affect the width of it. */
}

:root {
    --body-backG-color: rgb(15, 15, 15);
    --square-base-backG-color: #1d1d1d;
}

body {
    background-color: var(--body-backG-color);
    font-family: 'Roboto', sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: hidden; /*don't want scroll bar to appear.*/
    margin: 0px;
}

.container {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.setting {
    margin-bottom: 20px;
    background-color: #555;
    border-radius: 2px;
    padding: 4px 5px;
}

label {
    color: #fff;
    text-transform: uppercase;
    padding-right: 20px; 
}

span {
    color: #fff;
    background-color: #555;
    padding: 0px 9px;
}

input:focus {
    outline: none;
}

.square {
    background-color: var(--square-base-backG-color);
    box-shadow: 0px 0px 2px #000;
    /* height: 15px;
    width: 15px; */
    margin: 2px;
    transition: 2s ease;
}

.square:hover {
    transition-duration: 0s;
}