/* ════════════════════════════════════════════════════════════
   EverFree — Blog Styles
   ════════════════════════════════════════════════════════════ */

:root {
    --bg-body: #f5f6fa;
    --bg-surface: #ffffff;
    --border: #e2e4ec;
    --text-primary: #1a1c2a;
    --text-secondary: #5c5f78;
    --text-muted: #9b9eb8;
    --accent: #0d9488;
    --accent-hover: #0f766e;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
    --radius: 8px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-body: #0f1117;
        --bg-surface: #1a1c2a;
        --border: #2a2d3e;
        --text-primary: #e2e4f0;
        --text-secondary: #8b8faa;
        --text-muted: #5c5f78;
        --accent: #4fd1c5;
        --accent-hover: #38b2ac;
    }
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.blog-shell {
    max-width: 680px;
    margin: 0 auto;
    padding: 0 20px 80px;
}

/* ── Header ─────────────────────────────────────────────── */
.blog-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 28px 0 20px;
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border);
}

.blog-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.blog-logo img { width: 26px; height: 26px; }

.blog-nav-links {
    display: flex;
    gap: 22px;
    align-items: center;
}

.blog-nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
}

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

/* ── Index list ─────────────────────────────────────────── */
.blog-index-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
}

.blog-index-sub {
    color: var(--text-secondary);
    margin-bottom: 44px;
}

.post-card {
    display: block;
    padding: 22px 24px;
    margin-bottom: 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-primary);
    transition: border-color 0.2s;
}

.post-card:hover { border-color: var(--accent); }

.post-card .post-date {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
}

.post-card h2 {
    font-size: 1.18rem;
    font-weight: 650;
    letter-spacing: -0.01em;
    margin: 4px 0 6px;
}

.post-card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

/* ── Article ────────────────────────────────────────────── */
article .post-date {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-muted);
}

article h1 {
    font-size: 2.05rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.25;
    margin: 8px 0 30px;
}

article p { margin-bottom: 20px; }

article h2 {
    font-size: 1.25rem;
    font-weight: 650;
    letter-spacing: -0.01em;
    margin: 38px 0 14px;
}

article ul, article ol {
    margin: 0 0 20px 22px;
}

article li { margin-bottom: 10px; }

article a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    word-break: break-word;
}

article a:hover { border-bottom-color: var(--accent); }

article blockquote {
    border-left: 3px solid var(--accent);
    padding: 4px 0 4px 18px;
    margin: 0 0 20px;
    color: var(--text-secondary);
    font-style: italic;
}

article strong { font-weight: 650; }

article hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 36px 0;
}

/* ── Footer ─────────────────────────────────────────────── */
.blog-footer {
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.blog-footer a { color: var(--accent); text-decoration: none; }
.blog-footer a:hover { text-decoration: underline; }

@media (max-width: 520px) {
    article h1 { font-size: 1.6rem; }
    .blog-index-title { font-size: 1.6rem; }
    .blog-nav-links { gap: 14px; }
}