:root {
    color-scheme: light;
    font-family: Arial, Helvetica, sans-serif;
    --bg: #f4f7fb;
    --card: #ffffff;
    --text: #203040;
    --muted: #64748b;
    --accent: #4f46e5;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}
.container {
    width: min(1000px, 90vw);
    margin: 0 auto;
}
.site-header, .site-footer {
    background: #111827;
    color: white;
}
.site-header .container, .site-footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}
.site-header a { color: white; text-decoration: none; margin-left: 1rem; }
.brand { font-weight: bold; font-size: 1.1rem; margin-left: 0 !important; }
.hero {
    padding: 3rem 0 1.5rem;
}
.hero h1 { font-size: 2rem; margin-bottom: 0.5rem; }
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.2rem;
    padding-bottom: 2.5rem;
}
.card {
    background: var(--card);
    border-radius: 16px;
    padding: 1.2rem;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}
.date {
    color: var(--accent);
    font-weight: bold;
    margin: 0 0 0.4rem;
}
.card h2 { margin: 0 0 0.4rem; }
.button {
    display: inline-block;
    margin-top: 0.8rem;
    padding: 0.6rem 0.9rem;
    background: var(--accent);
    color: white;
    text-decoration: none;
    border-radius: 999px;
}
.post-detail {
    background: var(--card);
    border-radius: 16px;
    padding: 1.5rem;
    margin: 2rem 0 2.5rem;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}
.post-detail img {
    width: 100%;
    border-radius: 12px;
    margin-top: 1rem;
}
.back {
    display: inline-block;
    margin-top: 1.5rem;
    color: var(--accent);
    text-decoration: none;
}