:root {
  --primary: #2d6a4f;
  --primary-dark: #1b4332;
  --primary-light: #40916c;
  --accent: #e76f51;
  --accent-light: #f4a261;
  --bg: #fafaf7;
  --bg-card: #ffffff;
  --text: #2b2b2b;
  --text-light: #5a5a5a;
  --text-muted: #8a8a8a;
  --border: #e5e5e0;
  --shadow: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 20px rgba(0,0,0,0.08);
  --radius: 12px;
  --max-w: 780px;
  --max-w-wide: 1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.7}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent)}

/* HEADER */
.site-header{background:var(--primary-dark);color:#fff;padding:0;position:sticky;top:0;z-index:100;box-shadow:0 2px 10px rgba(0,0,0,.15)}
.header-inner{max-width:var(--max-w-wide);margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-size:1.5rem;font-weight:800;color:#fff;letter-spacing:-.5px;display:flex;align-items:center;gap:8px}
.logo span{color:var(--accent-light)}
.nav-links{display:flex;gap:24px;list-style:none}
.nav-links a{color:rgba(255,255,255,.85);font-size:.9rem;font-weight:500;padding:4px 0;border-bottom:2px solid transparent;transition:all .2s}
.nav-links a:hover{color:#fff;border-bottom-color:var(--accent-light)}
.mobile-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* HERO */
.hero{background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 50%,var(--primary-light) 100%);color:#fff;padding:80px 24px;text-align:center}
.hero h1{font-size:2.8rem;font-weight:800;margin-bottom:16px;line-height:1.2}
.hero p{font-size:1.15rem;opacity:.9;max-width:600px;margin:0 auto}

/* MAIN CONTENT */
.container{max-width:var(--max-w);margin:0 auto;padding:40px 24px}
.container-wide{max-width:var(--max-w-wide);margin:0 auto;padding:40px 24px}

/* ARTICLE GRID (HOME) */
.articles-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:28px;margin-top:32px}
.article-card{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;border:1px solid var(--border)}
.article-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.article-card .card-body{padding:24px}
.article-card h3{font-size:1.1rem;font-weight:700;margin-bottom:8px;line-height:1.4}
.article-card h3 a{color:var(--text)}
.article-card h3 a:hover{color:var(--primary)}
.article-card p{font-size:.9rem;color:var(--text-light);line-height:1.6}
.card-meta{display:flex;align-items:center;gap:12px;margin-top:14px;font-size:.8rem;color:var(--text-muted)}
.card-tag{background:var(--primary);color:#fff;padding:2px 10px;border-radius:20px;font-size:.75rem;font-weight:600}

/* BLOG POST */
.post-header{padding:60px 24px 40px;text-align:center;background:linear-gradient(180deg,#f0f5f0 0%,var(--bg) 100%)}
.post-header h1{font-size:2.2rem;font-weight:800;max-width:var(--max-w);margin:0 auto 16px;line-height:1.3;color:var(--primary-dark)}
.post-meta{font-size:.9rem;color:var(--text-muted);display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}
.post-meta span{display:flex;align-items:center;gap:4px}

.post-content{max-width:var(--max-w);margin:0 auto;padding:0 24px 60px}
.post-content h2{font-size:1.6rem;font-weight:700;color:var(--primary-dark);margin:40px 0 16px;padding-bottom:8px;border-bottom:2px solid var(--border)}
.post-content h3{font-size:1.25rem;font-weight:600;color:var(--text);margin:28px 0 12px}
.post-content p{margin-bottom:18px;color:var(--text);font-size:1.02rem}
.post-content ul,.post-content ol{margin:0 0 20px 24px}
.post-content li{margin-bottom:8px;font-size:1rem}
.post-content strong{color:var(--primary-dark)}
.post-content blockquote{border-left:4px solid var(--primary);background:#f0f7f3;padding:16px 20px;margin:24px 0;border-radius:0 var(--radius) var(--radius) 0;font-style:italic;color:var(--text-light)}
.post-content table{width:100%;border-collapse:collapse;margin:24px 0;font-size:.95rem;overflow-x:auto;display:block}
.post-content table th,.post-content table td{padding:12px 16px;text-align:left;border:1px solid var(--border)}
.post-content table th{background:var(--primary-dark);color:#fff;font-weight:600}
.post-content table tr:nth-child(even){background:#f8f9f8}

.callout{background:#fff3e0;border-left:4px solid var(--accent);padding:16px 20px;margin:24px 0;border-radius:0 8px 8px 0}
.callout.warning{background:#fff3e0;border-color:#e65100}
.callout.info{background:#e3f2fd;border-color:#1565c0}
.callout.success{background:#e8f5e9;border-color:var(--primary)}
.callout strong{display:block;margin-bottom:4px}

.toc{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px 28px;margin:0 0 36px}
.toc h4{font-size:1rem;font-weight:700;color:var(--primary-dark);margin-bottom:12px}
.toc ul{list-style:none;margin:0;padding:0}
.toc li{padding:4px 0}
.toc a{font-size:.92rem;color:var(--text-light)}
.toc a:hover{color:var(--primary)}

/* FAQ SCHEMA */
.faq-section .faq-item{border-bottom:1px solid var(--border);padding:20px 0}
.faq-section .faq-item:last-child{border-bottom:none}
.faq-section h3{color:var(--primary-dark);margin-bottom:8px}

/* SIDEBAR */
.post-layout{display:grid;grid-template-columns:1fr 300px;gap:40px;max-width:var(--max-w-wide);margin:0 auto;padding:0 24px 60px}
.sidebar{position:sticky;top:80px;align-self:start}
.sidebar-box{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:20px}
.sidebar-box h4{font-size:.95rem;font-weight:700;color:var(--primary-dark);margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.sidebar-box ul{list-style:none;padding:0}
.sidebar-box li{padding:6px 0;border-bottom:1px solid #f0f0f0}
.sidebar-box li:last-child{border-bottom:none}
.sidebar-box a{font-size:.88rem;color:var(--text-light)}

/* FOOTER */
.site-footer{background:var(--primary-dark);color:rgba(255,255,255,.8);padding:48px 24px 24px;margin-top:60px}
.footer-inner{max-width:var(--max-w-wide);margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px}
.footer-col h4{color:#fff;font-size:.95rem;font-weight:700;margin-bottom:12px}
.footer-col ul{list-style:none;padding:0}
.footer-col li{padding:4px 0}
.footer-col a{color:rgba(255,255,255,.7);font-size:.88rem}
.footer-col a:hover{color:var(--accent-light)}
.footer-bottom{max-width:var(--max-w-wide);margin:32px auto 0;padding-top:20px;border-top:1px solid rgba(255,255,255,.15);text-align:center;font-size:.82rem;color:rgba(255,255,255,.5)}

/* BREADCRUMB */
.breadcrumb{max-width:var(--max-w);margin:0 auto;padding:16px 24px 0;font-size:.85rem;color:var(--text-muted)}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--primary)}

/* RESPONSIVE */
@media(max-width:768px){
  .hero h1{font-size:1.8rem}
  .hero{padding:48px 20px}
  .post-header h1{font-size:1.6rem}
  .post-layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .articles-grid{grid-template-columns:1fr}
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--primary-dark);flex-direction:column;padding:16px 24px;gap:12px;box-shadow:var(--shadow-lg)}
  .nav-links.active{display:flex}
  .mobile-toggle{display:block}
  .footer-inner{grid-template-columns:1fr}
  .header-inner{padding:0 16px}
  .post-content{padding:0 16px 40px}
  .container,.container-wide{padding:24px 16px}
}