style.css

* {
    box-sizing: border-box;
}
html,
body {
    margin: 20px;
    background-color: #fafafa;
    padding: 0;
    background: #f5f5f5;
    font-family: 'Montserrat';
    font-size: 18px;
    font-weight: 300;
}

h2 {
    text-align: center;
    color: #1abc9c;
}

textarea {
    width: 220px;
    resize: vertical;
    padding: 15px;
    border-radius: 15px;
    border: 0;
    box-shadow: 4px 4px 10px rgba(0,0,0,0.06);
    height: 130px;
    margin-right: 40px;
    font-size: 13px;
    color: #000;

}

label {
    color: #1abc9c;
}

select {
    background: #fff;
    border: 0;
    border-radius: 15px;
    box-shadow: 4px 4px 10px rgba(0,0,0,0.06);

}

#textOutput {
    display: none;

}

#buttonSend {
    height: 60px;
    width: 75px;
    border: 0;
    margin-top: 15px;
    background: #1abc9c;
    color: #fafafa;
    font-size: 15px;
    box-shadow: 6px 6px 12px rgba(0,0,0,0.06);

}

#buttonSend:hover {
    height: 65px;
    width: 80px;
    transition: 0.2s ease-in-out;
    font-size: 17px;
}

button {
    position: relative;
    width: 100px;
    height: 60px;
    margin: 20px auto;
    padding: 0;
    text-align: center;
    border: none;
    outline: none;
    cursor: pointer;
    overflow: hidden;
    transition: transform 0.4s ease-in-out;
    border-radius: 15px;

}

.btn-green {
    overflow: auto;
    height: 50px;
    width: 50px;
    bottom: 95px;
    border-radius: 50%;
}


.buttons {
    height: 100px;
    width: 100px;
    margin-left: 88px;
    bottom: 95px;
}

.icon {
    position: absolute;
    left: 13.5px;
    top: 13px;
}
.btn-green {
    background: #1abc9c;
    border-bottom: 2px solid #12ab8d;
    box-shadow: inset 0 -2px #12ab8d;
}
.btn-green .icon {
    width: 24px;
    height: 24px;
    transition: all 0.4s ease-in-out;
}
.btn-green:hover .icon {
    transform: rotate(360deg) scale(1.2);
}