:root {
    --bg: #ffffff;
    --fg: #111111;
    --muted: #666;
    --link: #0066cc;
    --border: #ddd;
    --card-bg: #fafafa;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1a1a1a;
        --fg: #e8e8e8;
        --muted: #999;
        --link: #4a9eff;
        --border: #333;
        --card-bg: #242424;
    }
}

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--fg);
    line-height: 1.5;
    margin: 0;
    padding: 0;
}

header, main, footer {
    max-width: 760px;
    margin: 0 auto;
    padding: 1rem 1.25rem;
}

header h1 a {
    color: var(--fg);
    text-decoration: none;
}

a {
    color: var(--link);
    text-decoration: none;
}
a:hover { text-decoration: underline; }

.article-card {
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 0;
}
.article-card:last-child { border-bottom: none; }

.article-card h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.15rem;
}
.article-card .summary {
    margin: 0.5rem 0;
}
.article-card .meta {
    color: var(--muted);
    font-size: 0.85rem;
}
.article-card .meta a.tag {
    margin-left: 0.5rem;
    color: var(--muted);
}

.archive {
    border-top: 1px solid var(--border);
    margin-top: 2rem;
    padding-top: 1rem;
}
.archive li {
    list-style: none;
    padding: 0.4rem 0;
}

footer {
    color: var(--muted);
    border-top: 1px solid var(--border);
    margin-top: 3rem;
    padding-top: 1rem;
}

.placeholder {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--muted);
}

.btn-primary {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--link);
    color: white;
    border-radius: 4px;
}
.btn-primary:hover { text-decoration: none; opacity: 0.9; }

.btn-translate {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--fg);
    cursor: pointer;
    border-radius: 4px;
}
.btn-translate:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.translate-block {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}