:root {
    --bg: #ffffff;
    --fg: #1a1a1a;
    --muted: #6b7280;
    --accent: #2d7ff9;
    --border: #e5e7eb;
    --card-bg: #f9fafb;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111827;
        --fg: #f3f4f6;
        --muted: #9ca3af;
        --accent: #60a5fa;
        --border: #374151;
        --card-bg: #1f2937;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Microsoft YaHei", sans-serif;
    line-height: 1.7;
}

.site-header {
    border-bottom: 1px solid var(--border);
}

.nav {
    max-width: 720px;
    margin: 0 auto;
    padding: 1rem 1.25rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1rem;
}

.brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--fg);
    text-decoration: none;
}

.nav-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.nav-links a {
    color: var(--muted);
    text-decoration: none;
}

.nav-links a:hover {
    color: var(--accent);
}

.content {
    max-width: 720px;
    margin: 0 auto;
    padding: 2rem 1.25rem;
    min-height: 60vh;
}

a {
    color: var(--accent);
}

.post-card,
.not-found,
.post,
.page {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
}

.post-card h2,
.post h1,
.page h1 {
    margin: 0 0 0.5rem;
}

.post-card time,
.post time {
    color: var(--muted);
    font-size: 0.9rem;
}

.post-content img,
.page-content img {
    max-width: 100%;
    height: auto;
}

.post-content pre {
    background: var(--card-bg);
    padding: 1rem;
    overflow-x: auto;
    border-radius: 6px;
}

.post-content code {
    background: var(--card-bg);
    padding: 0.15rem 0.35rem;
    border-radius: 4px;
}

.post-content pre code {
    background: transparent;
    padding: 0;
}

.empty {
    color: var(--muted);
}

.site-footer {
    border-top: 1px solid var(--border);
    text-align: center;
    padding: 1rem 1.25rem;
    color: var(--muted);
}

.site-footer p {
    margin: 0;
}