body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #333;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: auto;
    background: #fff;
    padding: 20px 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1, h2 {
    color: #005792;
    border-bottom: 2px solid #005792;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

h1 {
    text-align: center;
    font-size: 2em;
}

h2 {
    font-size: 1.5em;
}

.progress-container {
    width: 100%;
    background-color: #e0e0e0;
    border-radius: 5px;
    margin-bottom: 10px;
}

.progress-bar {
    width: 0%;
    height: 20px;
    background-color: #4caf50;
    border-radius: 5px;
    transition: width 0.4s ease-in-out;
}

#progressText {
    text-align: center;
    font-weight: bold;
    font-size: 1.1em;
    margin-bottom: 30px;
}

.task-list {
    list-style-type: none;
    padding: 0;
}

.task-list li {
    background: #f9f9f9;
    margin-bottom: 10px;
    padding: 15px;
    border-radius: 5px;
    border-left: 5px solid #005792;
    display: flex;
    align-items: center;
}

.task-list li input[type="checkbox"] {
    margin-right: 15px;
    min-width: 18px;
    min-height: 18px;
}

.task-list label {
    flex-grow: 1;
}

.task-list li.completed {
    border-left: 5px solid #4caf50;
    background: #e8f5e9;
    text-decoration: line-through;
    color: #777;
}

#resetButton {
    display: block;
    width: 150px;
    margin: 30px auto 0;
    padding: 10px 15px;
    font-size: 1em;
    font-weight: bold;
    color: #fff;
    background-color: #d9534f;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#resetButton:hover {
    background-color: #c9302c;
}