body {
    font-family: 'Roboto', sans-serif;
    padding: 0;
    margin: 0;
    -webkit-box-sizing: border-box;
       -moz-box-sizing: border-box;
            box-sizing: border-box;
}
.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 40px 20px;
    background-color: whitesmoke;
    justify-content: center;
}
header {
    padding: 0 0 30px 0;
    font-size: 30px;
}

.coder {
    display: flex;
    flex-direction: row;
    justify-content: space-evenly;
    align-items: center;
}
.coder section {
    display: flex;
    flex-direction: column;
    width: 30%;
}
.coder section textarea {
    display: block;
    height: 20vmin;
    margin: 0 0 20px 0;
    padding: 20px;
    box-shadow: 0 0 25px rgba(0, 0, 0, .2);
    border: none;
    border-radius: 10px;
    resize: none;
    transition-duration: 400ms;
}
.coder section textarea:focus {
    outline: none;
    box-shadow: 0px 10px 40px rgba(0, 0, 0, .3);
}

.coder section button {
    width: 100%;
    height: 40px;
    border: none;
    color: white;
    border-radius: 10px;
    box-shadow: 0 6px 0 rgb(28, 107, 138);
    background-color: rgb(57, 147, 182);
    cursor: pointer;
    font-size: 3vmin;
    transition-duration: 250ms;
    transition-timing-function: ease-out;
}
.coder section button:hover {
    transform: translateY(6px);
    box-shadow: 0 0 0 rgb(28, 107, 138);
}
.coder section button:focus {
    outline: none;
    transform: translateY(6px);
    background-color: rgb(40, 167, 33);
    box-shadow: 0 0 0 rgb(28, 133, 23);
}