html, body {
    background: rgb(244,255,71);
    background: linear-gradient(205deg, rgba(244,255,71,1) 0%, rgba(102,224,125,1) 49%, rgba(39,160,245,1) 100%);
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
    overflow: hidden;
    overflow-x: hidden;
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
}

.container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    font-size: 200%;
    text-align: center;
    padding-top: env(safe-area-inset-top); /* for mobile */
}

.picker {
    background-color: #4CAF50; /* Green */
    border: none;
    color: white;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
}