body {
    font-family: Arial, Helvetica, sans-serif;
    width: 500px;
    padding: 1em;
}

.name {
    font-weight: 700;
}

h1 {
    margin-top: 0;
}

ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

form {
    margin: 0 auto;
    width: 400px;
    padding: 1em;
    border: 1px solid #CCC;
    border-radius: 1em;
}

div+div {
    margin-top: 1em;
}

label span {
    display: inline-block;
    width: 120px;
    text-align: right;
}

input,
textarea {
    font: 1em sans-serif;
    width: 250px;
    box-sizing: border-box;
    border: 1px solid #999;
}

input[type=checkbox],
input[type=radio] {
    width: auto;
    border: none;
}

input:focus,
textarea:focus {
    border-color: #000;
}

textarea {
    vertical-align: top;
    height: 5em;
    resize: vertical;
}

fieldset {
    width: 250px;
    box-sizing: border-box;
    margin-left: 136px;
    border: 1px solid #999;
}

button {
    margin: 20px 0 0 124px;
}

label {
    position: relative;
}

label em {
    position: absolute;
    right: 5px;
    top: 20px;
}

a:hover {
    font-weight: 700;
}

article:nth-of-type(2n-1) {
    background-color: lightgray;
}

.attributes li::after {
    content: " "attr(data-attr);
}

body {
    counter-reset: countLectures;
}

article.lecture .lecture-title::before {
    counter-increment: countLectures;
    content: counter(countLectures)". ";
}