:root {
    --body-backG-color: #b70ec4c9;
    --container-backG-color: #c9f3e9;
    --btn-backG-color: #3290ef;
}

@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. */
}
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: 0;
    padding: 20px;
}

.container {
    background-color: var(--container-backG-color);
    border-radius: 10px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1), o 6px 6px rgba(0, 0, 0, 0.1);
    padding: 50px 20px;
    text-align: center;
    max-width: 100%;
    width: 800px;
}

h1 {
    font-size: 1.2rem;
    margin: 0;
    opacity: 0.5;
    letter-spacing: 2px;
}

.joke {
    font-size: 30px;
    letter-spacing: 1px;
    line-height: 40px;
    margin: 50px auto;
    max-width: 600px;
}

.btn {
    position: relative;
    bottom: -30px;
    background-color: var(--btn-backG-color);
    color: #f6f6f6e4;
    border: 0px;
    border-radius: 10px;
    padding: 14px 40px;
    font-size: 16px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1), 0 6px 6px rgba(0, 0, 0, 0.1);
    transition: 0.01s ease-in;
    cursor: pointer;
}

.btn:active {
    transform: scale(0.9);
}

.btn:focus {
    outline: 0;
}