body {
    width: 450px;
    background: white;
    font-family: sans-serif;
}

textarea {
    width: 100%;
    height: 200px;
    max-width: 100%;
    max-height: 500px;
    padding: 0;
    border: 0;
}

button {
    width: 100%;
    color: #fff;
    background-color: #5cb85c;
    border-color: #4cae4c;
    padding: 6px 12px;
    cursor: pointer;
    border: 1px solid transparent;
    border-radius: 4px;
}

button:hover {
    background-color: #449d44;
    border-color: #398439;
}

button:active {
    background-color: #398439;
    border-color: #255625;
}

.spinner {
    background-color: transparent;
    border: 3px solid #03a9f4;
    border-radius: 50%;
    border-top-color: transparent;
    border-right-color: transparent;
    width: 1em;
    height: 1em;
    display: inline-block;
    vertical-align: middle;
    box-sizing: border-box;
    animation: spinner-animation 0.65s infinite linear;
    font-size: 35px;
}

@keyframes spinner-animation {
    0% {
        transform:rotate(0deg)
    }
    100% {
        transform:rotate(360deg)
    }
}