*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #1f1f1f;
    user-select: none;
}

body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.list-area {
    padding: 20px;
    border: 2px solid black;
    border-radius: 15px;
    background-color: #333232;
    box-shadow: 0 0 10px 5px #808080;
}

.list-area h1 {
    margin-bottom: 15px;
    color: #e2e2e2;
    text-align: center;
    background-color: #333232;
    border-radius: 15px;
    box-shadow: inset 0 0 10px #e2e2e2;
}

.functional-area {
    display: flex;
    flex-direction: column;
    background-color: #333232;
}

#set-task {
    height: 40px;
    width: 250px;
    padding-left: 20px;
    border: none;
    border-radius: 15px;
    color: #027702;
    font-weight: 900;
    background-color: #333232;
    box-shadow: inset 0 0 5px #e2e2e2;
    margin-bottom: 10px;
}

#set-task::placeholder {
    color: #027702b0;
    font-weight: 900;
}

#set-task:focus {
    outline: none;
}

.add-todo {
    height: 40px;
    width: 250px;
    margin-bottom: 10px;
    border: none;
    border-radius: 15px;
    color: #027702b0;
    font-size: medium;
    font-weight: 900;
    background-color: #333232;
    box-shadow: inset 5px 5px 10px -3px #e2e2e2,
                  inset  -5px -5px 10px -3px #000;
    cursor: pointer;
}

.add-todo:active {
    box-shadow: inset -5px -5px 10px -3px #e2e2e2,
                  inset  5px 5px 10px -3px #000;
    color: #005200;
    font-weight: 700;
}

.display {
    padding: 15px;
    border-radius: 15px;
    background-color: #333232;
    box-shadow: inset 0 0 5px #e2e2e2;
}

.task-list {
    list-style: none;
    color: #f0f8ff;
    font-weight: 900;
    font-size: large;
}

.task-list li {
    padding: 3px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #333232;
}

.task-line {
    background-color: #333232;
    cursor: pointer;
}

.completed {
    text-decoration: 2px line-through #ff0000;
    text-shadow: 0 0 10px #000;
}

.delete-btn {
    padding: 5px 15px;
    border: none;
    border-radius: 15px;
    font-weight: 900;
    background-color: #333232;
    color: #bb0000;
    box-shadow: inset 5px 5px 6px -3px #e2e2e2,
                  inset  -5px -5px 6px -3px #000;
    cursor: pointer;
}

.delete-btn:active {
    box-shadow: inset -5px -5px 5px -3px #e2e2e2,
                  inset  5px 5px 5px -3px #000;
    color: #b80000;
    font-weight: 700;
}