body {
    background: #fff;
    width: 85%;
    max-width: 760px;
    margin: auto;
    font-family: Merriweather, serif;
}

a {
    text-decoration: none;
    color: #000;
    font-weight: 400;
}

h1 {
    margin: 0;
    margin-top: 2em;
}

header {
    text-align: center;
}

h3 {
    font-weight: 400;
    margin-bottom: 0;
    padding-bottom: 0;
}


p {
    margin-top: 0.5em;
    padding-bottom: 0.5em;
    font-size: 0.9em;
}

p a {
    color: #999;
}

p a:hover {
    color: #666;
}

.time {
    border: 0;
    margin-bottom: 3em;
}

.item {
    padding-bottom: 0.5em;
    margin-bottom: 0.5em;
    border-bottom: 1px #ccc solid;
}
.item:last-child {
    border-bottom: none;
}
.item .meta {
    font-size: 0.9em;
    color: #666;
    margin-bottom: 0.25em;
}
.item .excerpt {
    margin-top: 0.25em;
}

.similar-articles {
    font-size: 0.8em;
    margin-top: 0.25em;
}
.similar-articles ul {
    margin: 0.25em 0 0 1em;
    padding: 0;
}
.similar-articles li {
    margin-bottom: 0.25em;
}

footer {
    margin-top: 3em;
    margin-bottom: 3em;
    font-size: 0.8em;
}

.collapsible {
    cursor: pointer;
    padding: 10px;
    background-color: #f9f9f9;
    border: 1px solid #ccc;
    margin-bottom: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.collapsible .icon {
    font-size: 0.8em;
    color: #666;
}

.article-list {
    display: none;
    margin-left: 20px;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.4);
}

.modal-content {
    background-color: #fff;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}

.top-menu {
    margin-top: 1em;
    margin-bottom: 1em;
}
.top-menu .menu-line {
    border: none;
    border-top: 1px solid #ddd;
    margin: 0.5em 0;
}
.top-menu .menu-center {
    display: flex;
    justify-content: center;
    gap: 1em;
    align-items: center;
    margin: 0.25em 0;
}
.top-menu .menu-item {
    color: #000;
    font-weight: 600;
}
.top-menu .menu-item.active {
    text-decoration: underline;
}