app.css

body {
    overflow: auto;
    background-color: #303030;
}

.row {
    /* margin: 0 !important; */
}

#app {
    height: 100vh;
}

.navbar {
    background-color: #2D394D;
}

.settings-module {
    max-width: 10rem;
}

.card-body {
    /*             margin-top: 20px;
    min-height: 480px; */
}

.card-header {
    background-color: #2D394D;
}

a {
    color: #00BC8C;
    transition: color .2s;
}

a:hover {
    color: #FF7A90;
    text-decoration: none;
}

legend.combination,
legend.repetition {
    margin-bottom: 0;
}

input.form-control[type=number] {
    max-width: 60%;
}

.modal-dialog {
    padding-top: 8%;
}

.expected-phrase,
input.form-control-lg {
    max-width: 60rem;
    margin: auto;
    height: auto;
}

.expected-phrase {
    min-height: 68px;
}

.center {
    display: flex;
    justify-content: center;
}

input.form-control-lg,
.word {
    font-size: 32px;
    height: 60px;
    text-align: center;
}

.word.mb-3 {
    height: auto;
    margin-bottom: 0 !important;
    padding: 10px;
}

.stats {
    margin-top: -15px;
}

h4 {
    margin-bottom: 40px;
}

.input-fields {
    margin: auto;
    max-width: 60rem;
    padding-bottom: 20px;
    padding-top: 20px;
}

.input-practice-typing {
    margin-top: -30px;
}

.form-group input::-webkit-input-placeholder {
    transform: scale(0.50);
}

.lesson-index h4 {
    margin-top: 12px;
}

.lesson-index h4,
.stats h4 {
    font-size: 20px;
}

/** These two seems couldn't be combined. **/
.form-group input:-ms-input-placeholder {
    font-size: 20px;
}

.form-group input::-moz-placeholder {
    font-size: 20px;
}

.form-control.incorrect-input {
    background-color: #E7BBDC;
}

.stats {
    margin-top: 5px;
    margin-bottom: 5px;
    opacity: 0.65;
}


.sound-toggler-wrapper {
    font-size: 13px;
    /* position: fixed;
    top: 26px; */
}

.sound-toggler-wrapper {
    right: 50px;
    width: 136px;
}

.sound-toggler-wrapper .btn {
    box-shadow: none;
    margin-left: 28px;
    padding: 2px 8px;
    min-height: 28px;
    min-width: 65px;
}

.footer-links {
    font-size: 12px;
    margin-top: 10px;
    margin-bottom: 10px;
}

.footer-links a {
    margin: 0 4px;
}

.footer-links .label {
    display: inline-block;
    margin-left: 2px;
}

.powered-by a {
    display: block;
    font-size: 10px;
    margin-bottom: 10px;
}

.powered-by img {
    height: 14px;
    margin-bottom: 2px;
}

/* .title-wrapper {
    position: fixed;
    bottom: 20px;
    width: calc(100% - 42px);
} */