styles.css

body {
    background-color: #fff;
    color: #d2d7df;
}
.app {
    width: 500px;
    margin: auto;
    background-color: #353535;
    padding-top: 5px;
    padding-bottom: 5px;
    -webkit-border-radius: 10px;
    -moz-border-radius: 10px;
    border-radius: 10px;
}
.header {
    text-align: center;
    text-transform: uppercase;
    /* border-bottom: 1px solid white; */
    font-size: 0.85em;
}
.task-container {
    text-transform: uppercase;
}
.task {
    display: flex;
    flex-direction: row;
    font-size: 1.2em;
    align-items: stretch;
    padding: 15px 5px 15px 10px;
    border-bottom: 1px solid #d2d7df;
    cursor: default;
}
.task:hover {
    background-color: #6c6c6c;
}
.task:last-child {
    border-bottom: none;
}
.task-text {
    flex-grow: 1;
    padding-left: 5px;
}
.task.done .task-text {
    font-style: italic;
    text-decoration: line-through;
    color: #babec5;
}
.remove-btn {
    border: 0;
    background-color: inherit;
    cursor: pointer;

    color: #d2d7df;
    border: 1px solid #babec5;
    text-transform: uppercase;
    margin-right: 3px;
}
.task-input-container {
    display: flex;
    flex-direction: row;
    /* border-bottom: 2px solid #d2d7df; */
    padding: 8px;
}
.task-input-container input {
    width: 100%;
    font-size: 1.35em;
    padding: 6px;
    background-color: #353535;
    border: 1px solid #babec5;
    color: #d2d7df;
}
.task-input-container input:focus {
    outline: none;
}
.task-input-container button {
    width: 100px;
    color: #d2d7df;
    background-color: #353535;
    text-transform: uppercase;
    margin-left: 4px;
}
.task-input-container button:focus {
    outline: none;
}