:root {
    --bg-color: #ffffff;
    --text-color: #2c2c2c;
    --text-muted: #666666;
    --text-muted2: #888888;
    --link-color: #2c2c2c;
    --link-hover: #555555;
    --border-color: #e0e0e0;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --text-muted: #a0a0a0;
    --text-muted2: #888888;
    --link-color: #e0e0e0;
    --link-hover: #bbbbbb;
    --border-color: #333333;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Libre Baskerville', Georgia, serif;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--bg-color);
    max-width: 680px;
    margin: 0 auto;
    padding: 60px 24px;
    transition: background-color 0.3s, color 0.3s;
}

header {
    margin-bottom: 48px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 24px;
    text-align: center;
}

.logo {
    width: 140px;
    height: auto;
    display: block;
    margin: 0 auto 24px;
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: none;
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    cursor: pointer;
    font-family: inherit;
    font-size: 14px;
    color: var(--text-color);
    border-radius: 4px;
    transition: background-color 0.3s, color 0.3s;
}

.theme-toggle:hover {
    background-color: var(--border-color);
}

h1 {
    font-size: 28px;
    font-weight: 400;
    letter-spacing: 0.5px;
    line-height: 1.4;
}

.subtitle {
    font-style: italic;
    color: var(--text-muted);
    margin-top: 8px;
    font-size: 14px;
}

.post-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 16px;
}

.author-pic {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.author-name {
    font-size: 14px;
    color: var(--text-color);
}

.back-link {
    font-size: 14px;
    color: var(--text-muted2);
    text-decoration: none;
    display: inline-block;
    margin-bottom: 24px;
}

.back-link:hover {
    color: var(--link-hover);
}

.post-date {
    font-size: 13px;
    color: var(--text-muted2);
    font-style: italic;
    margin-top: 12px;
}

.post-list {
    list-style: none;
}

.post-item {
    margin-bottom: 32px;
}

.post-item a {
    text-decoration: none;
    color: var(--link-color);
    display: block;
}

.post-item a:hover {
    color: var(--link-hover);
}

.post-title {
    font-size: 20px;
    font-weight: 400;
    margin-bottom: 6px;
}

.post-excerpt {
    margin-top: 8px;
    color: var(--text-muted);
    font-size: 15px;
}

.content {
    font-size: 18px;
}

.content p {
    margin-bottom: 24px;
}

.content p:first-of-type::first-letter {
    font-size: 3em;
    float: left;
    line-height: 1;
    margin-right: 8px;
    margin-top: 4px;
}

.content a {
    color: var(--link-color);
}

footer {
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    font-size: 13px;
    color: var(--text-muted2);
    font-style: italic;
}