/* Reset some default styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Body styling */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* Container styling */
.container {
    max-width: 600px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

/* Heading styling */
h1 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #2c3e50;
    font-size: 2.5rem;
}

/* Input section styling */
.input-section {
    display: flex;
    margin-bottom: 2rem;
    gap: 10px;
}

#todoInput {
    flex: 1;
    padding: 0.8rem;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

#todoInput:focus {
    border-color: #3498db;
}

#addBtn {
    padding: 0.8rem 1.5rem;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

#addBtn:hover {
    background-color: #2980b9;
}

/* Todo list styling */
#todoList {
    list-style-type: none;
}

#todoList li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    margin-bottom: 0.5rem;
    background-color: #f8f9fa;
    border-radius: 5px;
    border-left: 4px solid #3498db;
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

#todoList li:hover {
    background-color: #e9ecef;
}

#todoList li span {
    flex: 1;
    word-break: break-word;
    padding-right: 1rem;
}

.delete-btn {
    padding: 0.5rem 1rem;
    background-color: #e74c3c;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.delete-btn:hover {
    background-color: #c0392b;
}

/* Responsive design */
@media (max-width: 600px) {
    .container {
        margin: 1rem;
        padding: 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .input-section {
        flex-direction: column;
    }
    
    #addBtn {
        width: 100%;
    }
}