body {
    font-family: Arial;
    background: linear-gradient(135deg, #667eea, #764ba2);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    background: white;
    padding: 30px;
    border-radius: 12px;
    width: 320px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

.input-section {
    display: flex;
    gap: 10px;
}

input {
    flex: 1;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #ccc;
}

button {
    padding: 10px 15px;
    border: none;
    border-radius: 6px;
    background: #667eea;
    color: white;
    cursor: pointer;
}

button:hover {
    background: #5563d1;
}

ul {
    margin-top: 20px;
    padding: 0;
}

li {
    list-style: none;
    background: #f4f4f4;
    padding: 10px;
    margin-top: 10px;
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.completed {
    text-decoration: line-through;
    color: gray;
}

.delete-btn {
    background: #ff0000;
    padding: 5px 8px;
    font-size: 12px;
}

.delete-btn:hover {
    background: #d00000;
}