style.css

@charset "utf-8";

body {
    margin: 0;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.lists {
    padding: 50px;
}

.task-list {
    width: 220px;
    float: left;
    margin-right: 25px;
    padding: 25px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.list-title {
    margin: 0;
    text-align: center;
}

.list-tasks {
    padding: 0;
}

.drop {
    width: 100%;
    text-align: center;
    font-weight: bold;
    padding: 15px 0;
}

.drop-state-none {
    display: none;
}

.drop-state-dragging {
    background-color: #E98B39;
}

.drop-state-hovering {
    background-color: #2ECC71;
}

.task {
    list-style-type: none;
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 10px;
    margin-bottom: 10px;
}

.delete:before {
    content: "×";
}

.delete {
    color: red;
    float: right;
    font-weight: bold;
}