* {
    margin: 0;
    padding: 0;
    font-family: "montserrat", sans-serif;
    box-sizing: border-box;
}

body {
    background-image: linear-gradient(110deg, #a9f5a9, #642efe, #f2f5a9);
    min-height: 100vh;
}

.container {
    max-width: 880px;
    margin: auto;
    padding: 10px;
}

.task-new {
    width: 100%;
    border: none;
    border-bottom: 2px solid #000;
    background: none;
    padding: 10px;
    outline: none;
    font-size: 18px;
}

h3 {
    margin: 10px 0;
}

.task {
    width: 100%;
    background: rgba(255, 255, 255, 0.5);
    padding: 18px;
    margin: 6px 0;
    overflow: hidden;
}

.task i {
    float: right;
    margin-left: 20px;
    cursor: pointer;
}

.task.task-completed .task-uncheck {
    display: none;
}

.task.task-uncompleted .task-check {
    display: none;
}

.completed .task {
    background: rgba(0, 0, 0, .5);
    color: #ffffff;
}