body {
    font-family: Arial, sans-serif;
    background-color: #f0f8ff;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px 10px;
}
.container {
    max-width: 500px;
    width: 90%;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
    border: 2px solid #6495ed;
}
h2 {
    text-align: center;
    color: #1e90ff;
    margin-bottom: 20px;
}
form {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}
input[type="text"] {
    flex-grow: 1;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1em;
}
button {
    padding: 12px 20px;
    background-color: #1e90ff;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1em;
    font-weight: bold;
    transition: background-color 0.3s;
}
button:hover {
    background-color: #007bff;
}
#todo-list {
    list-style: none;
    padding: 0;
}
#todo-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    margin-bottom: 8px;
    background-color: #f9f9f9;
    border-radius: 6px;
    transition: background-color 0.3s;
}
#todo-list li.done {
    background-color: #e6ffe6;
    text-decoration: line-through;
    color: #777;
}
.task-actions button {
    background: none;
    border: none;
    color: #ff4500;
    font-size: 1.1em;
    cursor: pointer;
    padding: 5px;
    transition: color 0.2s;
}
.task-actions button:hover {
    color: #cc0000;
}
.task-text {
    flex-grow: 1;
    padding-right: 10px;
    cursor: pointer;
}
.empty-message {
    text-align: center;
    color: #999;
    margin-top: 20px;
}

@media (max-width: 600px) {
    body {
        margin: 0;
        align-items: flex-start; 
        min-height: auto;
        padding-top: 20px;
        padding-bottom: 20px;
    }
    .container {
        max-width: 100%;
        width: calc(100% - 30px);
        margin: 0 auto;
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 6px 14px rgba(0, 0, 0, 0.12);
        border-width: 1px;
    }
    h2 {
        font-size: 1.4rem;
    }
    
    form {
        flex-direction: column;
        gap: 15px;
        margin-bottom: 25px;
    }
    input[type="text"] {
        padding: 10px;
        font-size: 1rem;
    }
    button {
        padding: 10px 15px;
        font-size: 1rem;
    }

    #todo-list li {
        padding: 12px;
        font-size: 0.95em;
    }
    .task-actions button {
        font-size: 1em;
        padding: 3px;
    }
}

@media (max-width: 380px) {
    .container {
        padding: 15px;
        width: calc(100% - 20px);
    }
    h2 {
        font-size: 1.2rem;
    }
    #todo-list li {
        font-size: 0.9em;
        padding: 10px;
    }
}