styles.css

@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    color: #FFFFFF;
    font-size: 18px;
    font-weight: 400;
    line-height: 21px;
    background-color: #3B3F45;
}

h1 {
    font-size: 24px;
    line-height: 28px;
}

h2 {
    font-weight: 400;
    font-size: 18px;
    line-height: 21px;
}

ul {
    list-style: none;
}

.header {
    background-color: #4A4F56;
}

.container {
    width: 800px;
    max-width: 100%;
    margin: 0 auto;
    padding: 0 20px;
}

.header-wrapper {
    color: #FF8984;
    text-align: center;
    padding: 19px 0 12px;
}


.header-title {
    margin-bottom: 4px;
}

.subtitle {
    font-size: 16px;
    line-height: 19px;
}

.list-wrapper {
    padding: 20px 0 45px;
}

.todo-item {
    background-color: #88839E;
    position: relative;
    border-bottom: 3px solid #88839E;
    border-top: 3px solid #88839E;
    transition: 0.6s;
}

.todo-item:nth-child(even) {
    background-color: #7A7593;
    border-color: #7A7593;
}

.todo-item:hover {
    background-color: #625E77;
    border-color: #FFFFFF;
}

.todo-item-label {
    padding: 9px 12px 9px 47px;
    cursor: pointer;
    display: flex;
    align-items: center;
}

.checkbox {
    width: 19px;
    height: 19px;
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
}

.checkbox:checked + .todo-item-label {
    text-decoration: line-through;
}

.note {
    font-size: 11px;
    line-height: 13px;
    margin-left: 6px;
}

.caption {
    background-color: #4A4F56;
    color: #FF8984;
    padding: 12px;
    text-align: center;
}