body {
    font-family: sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: #f6f6f6;
    color: #202122;
}

header {
    background: #fff;
    padding: 10px;
    border-bottom: 1px solid #a2a9b1;
    text-align: center;
}

.search-container {
    max-width: 600px;
    margin: 0 auto;
}

#search-input {
    width: 80%;
    padding: 8px;
    font-size: 16px;
}

#search-button {
    padding: 8px 16px;
    font-size: 16px;
}

main {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
}

#article-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

#article-container.compare-view {
    grid-template-columns: 1fr 1fr;
}

.article {
    background: #fff;
    padding: 20px;
    border: 1px solid #a2a9b1;
    border-radius: 4px;
}

.article h1 {
    font-size: 2em;
    border-bottom: 1px solid #a2a9b1;
    padding-bottom: 10px;
}

.article h2 { font-size: 1.5em; }
.article h3 { font-size: 1.25em; }

.article strong { font-weight: bold; }
.article em { font-style: italic; }
.article code { background: #f8f9fa; padding: 2px 4px; border-radius: 2px; }
.article pre { background: #f8f9fa; padding: 10px; overflow: auto; }
.article blockquote { border-left: 4px solid #a2a9b1; padding-left: 10px; color: #646464; }

#compare-button {
    margin-bottom: 20px;
    padding: 8px 16px;
    background: #36c;
    color: #fff;
    border: none;
    cursor: pointer;
}

#compare-list {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    padding: 20px;
    border: 1px solid #a2a9b1;
    max-width: 400px;
    z-index: 10;
}

#compare-list ul {
    list-style: none;
    padding: 0;
}

#compare-list li {
    padding: 8px;
    cursor: pointer;
}

#compare-list li:hover {
    background: #f8f9fa;
}

.hidden { display: none; }

.loading { text-align: center; padding: 20px; }

@media (max-width: 768px) {
    #article-container.compare-view {
        grid-template-columns: 1fr;
    }
}