body {
    line-height: 1.6;
    font-size: 16px;
    margin: 0;
}

.layout {
    display: flex;
    min-height: 100vh;
}

.border-area {
    width: 80px;
    position: relative;
    flex-shrink: 0;
}

.main-content {
    flex-grow: 1;
    max-width: 700px;
    padding: 15px 40px 40px 40px;
}

.header-icon {
    position: absolute;
    width: 36px;
    height: 36px;
    right: 15px;
    top: 40px;
}

p {
    max-width: 700px;
    font-size: 16px;
}

li {
    list-style-position: outside;
    margin-left: 1.2em;
    padding-left: 0;
}

h3 {
    padding: 0px;
    margin-top: 0px;
}

a {
    color: blue;
    text-decoration: none;
}

a:hover {
    color: rgb(55, 0, 92);
    text-decoration: underline;
}

.header {
    position: relative;
    margin-bottom: -20px;
}

.header a {
    color: inherit;
    text-decoration: none;
}

.header a:hover {
    color: inherit;
    text-decoration: none;
}

.subtitle {
    font-size: 1.6em;
    margin-top: 0px;
}

@media screen and (max-width: 768px) {
    .border-area {
        width: 60px;
    }

    .main-content {
        padding: 20px 16px;
    }

    .header-icon {
        width: 32px;
        height: 32px;
        right: 12px;
        top: 20px;
    }
}