body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.todo-container {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    width: 350px;
}

h2 { text-align: center; color: #333; }

.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    outline: none;
}

button {
    padding: 10px 15px;
    background-color: #764ba2;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: 0.3s;
}

button:hover { background-color: #5a3782; }

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

li {
    background: #f9f9f9;
    padding: 10px;
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 6px;
    border-left: 4px solid #764ba2;
}

.delete-btn {
    background: #ff5e5e;
    padding: 5px 10px;
    font-size: 12px;
}