body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f7fa;
    color: #333;
}

.modal {
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.modal-content {
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.app-container {
    display: none;
    padding: 20px;
    max-width: 800px;
    margin: 0 auto;
}

h1 {
    color: #007bff;
    text-align: center;
}

input {
    width: 90%;
    max-width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.buttons {
    display: flex;
    justify-content: space-around;
    margin-top: 20px;
}

.btn {
    padding: 10px 20px;
    cursor: pointer;
    background-color: #007bff;
    border: none;
    border-radius: 5px;
    color: white;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #0056b3;
}

.editor {
    margin-top: 20px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

ul {
    list-style-type: none;
    padding: 0;
}

li {
    background-color: white;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-bottom: 10px;
    padding: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

li .btn-group {
    margin-left: auto;
}

li button {
    margin-left: 10px;
    background-color: #dc3545;
}

li button:hover {
    background-color: #c82333;
}