* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 40px 16px;
    background: #f4f5f7;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: #222;
}

.container {
    max-width: 480px;
    margin: 0 auto;
    background: #fff;
    border-radius: 10px;
    padding: 28px 24px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

h1 {
    margin: 0 0 4px;
    font-size: 24px;
}

.stats {
    margin: 0 0 20px;
    color: #777;
    font-size: 14px;
}

.add-form {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.add-form input[type="text"] {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid #d5d8dc;
    border-radius: 6px;
    font-size: 15px;
}

.add-form button,
.check-btn,
.delete-btn {
    cursor: pointer;
}

.add-form button {
    padding: 10px 18px;
    border: none;
    border-radius: 6px;
    background: #2563eb;
    color: #fff;
    font-size: 15px;
}

.add-form button:hover {
    background: #1d4ed8;
}

.todo-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.todo-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid #eef0f2;
}

.todo-list li:last-child {
    border-bottom: none;
}

.todo-list li.empty {
    color: #999;
    padding: 20px 0;
    text-align: center;
}

.toggle-form,
.delete-form {
    margin: 0;
    display: contents;
}

.check-btn {
    background: none;
    border: none;
    font-size: 20px;
    line-height: 1;
    padding: 0;
    color: #2563eb;
}

.title {
    flex: 1;
    font-size: 15px;
    word-break: break-word;
}

li.done .title {
    text-decoration: line-through;
    color: #aaa;
}

.delete-btn {
    background: none;
    border: none;
    font-size: 18px;
    line-height: 1;
    color: #c1c5cb;
    padding: 0 4px;
}

.delete-btn:hover {
    color: #dc2626;
}