* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: Verdana, Arial, sans-serif;
}

h1,h2,h3,h4,h5,h6 {
    font-family: Georgia, Time, serif;
}

header,main, article, textarea, input, label {
    display: block;
}

div#wrapper {
    width:640px;
    margin: 8px auto;
    padding:8px;
    border: 2px solid lightgray;
    border-radius: 10px;
    box-shadow: 5px 5px 2px darkgray;
}

h1 {
    margin: 8px auto;
    width: 350px;
}

.login_logout {
    display: block;
    background-color: darkgray;
    width: 80px;
    height: 32px;
    border-radius: 5px;
    text-align: center;
}

#wrapper_for_login_logout {
    float: right;
    margin-right: 50px;
}

header::after {
    content: '.';
    display: block;
    clear: both;
    height: 0;
    visibility: hidden;
}

a {
    text-decoration: none;
    padding-top: 5px;
}

a:hover {
    background-color: lightgray;
    color:darkred;
}

h2, p, textarea, input {
    margin-top:8px;
    margin-left: 16px;
}

#add_comment {
    width: 150px;
    height: 32px;
    text-align: center;
    margin-left:180px;
    background-color: darkgray;
    border-radius: 5px;
}

hr.between_header_comments {
    margin-top:8px;
}

hr.between_comments {
    margin-left: -32px;
}

ol {
    padding: 8px;
    margin-left: 24px;
}

li {
    margin-top: 8px;
}

.delete, .reply, #cancel_form, #login_form, #add_reply_form, #reply_cancel_form {
    display: inline-block;
}

.delete_button, .reply_button {
    width: 60px;
    height: 24px;
    background-color: darkgray;
    border-radius: 5px;
}

#comment_error, #reply_error, #login_form_error {
    font-style: italic;
    color: red;
    margin-top: 8px;
}

span {
    font-size: 12px;
    font-style: italic;
}

#login, #login_cancel, #reply_cancel, #add_reply_in_reply_page {
    width: 80px;
    height: 32px;
    text-align: center;
    background-color: darkgray;
    border-radius: 5px;
}

.login_label {
    float: left;
    height: 24px;
    text-align: right;
    width: 100px;
    margin-right: 16px;
    margin-left: 150px;
}

.login_label.password_label{
    margin-top: 8px;
}

#user_name, #password {
    height: 24px;
}

#login {
    margin-left: 200px;
}

#cancel_form{
    margin-left: -120px;
}

#add_reply_in_reply_page {
    margin-left: 100px;
}

#reply_cancel_form {
    margin-left: -160px;
}