:root{--ink:#0f172a;--muted:#6b7280;--bg:#ffffff;--border:#e5e7eb;--accent:#0ea5e9;--soft:#f7f9fc}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial}
main{max-width:960px;margin:0 auto;padding:0 20px}

/* Header */
.main-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:0 2px 4px rgba(0,0,0,.03)}
.nav-bar{max-width:960px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:14px 20px}
.brand{font-weight:700;font-size:1.25rem;color:var(--ink);text-decoration:none}
.nav-links{display:flex;gap:22px;list-style:none;margin:0;padding:0}
.nav-links a{text-decoration:none;color:var(--ink);font-weight:500}
.nav-links a:hover{color:var(--accent)}

/* Hero */
.hero-section{padding:70px 0 40px;border-bottom:1px solid var(--border);background:linear-gradient(180deg,var(--soft),#fff)}
.hero-section h1{font-size:2.6rem;line-height:1.2;margin:0 0 10px;text-align:center}
.hero-section .sub{font-size:1.15rem;color:var(--muted);margin:0 0 22px;text-align:center}
.hero-section .btn{display:block;width:max-content;margin:0 auto;padding:12px 20px;background:var(--ink);color:#fff;border-radius:8px;text-decoration:none;font-weight:600}
.hero-section .btn:hover{background:#111827}

/* Content */
.content-section{padding:40px 0;border-bottom:1px solid var(--border)}
.content-section h2{font-size:1.4rem;margin:0 0 14px;text-align:center}
.content-section p{margin:10px auto;color:var(--muted);line-height:1.8;max-width:72ch;text-align:center}

/* Featured */
.featured,.latest{padding:40px 0}
.featured h2,.latest h2{font-size:1.4rem;margin:0 0 14px;text-align:center}
.feature-item,.list-item{padding:16px 0;border-bottom:1px solid var(--border)}
.feature-item:last-child,.list-item:last-child{border-bottom:none}
.feature-item a,.list-item a{font-weight:600;color:var(--ink);text-decoration:none}
.feature-item a:hover,.list-item a:hover{color:var(--accent)}
.feature-item p,.list-item p{margin:6px 0 0;color:var(--muted);max-width:72ch}

/* Articles page */
.articles-page h1{text-align:center;margin-top:30px;font-size:2rem}
.search-section{margin:20px 0;text-align:center}
.search-section input{width:100%;max-width:600px;padding:12px 14px;border:1px solid var(--border);border-radius:10px;font-size:1rem}
.articles-list{display:flex;flex-direction:column;gap:16px;margin-bottom:50px}
.article-card{padding:18px;border:1px solid var(--border);border-radius:10px;transition:all .2s ease;background:#fff}
.article-card:hover{box-shadow:0 4px 12px rgba(0,0,0,0.06)}
.article-card a{font-weight:600;font-size:1.1rem;text-decoration:none;color:var(--ink)}
.article-card p{margin:6px 0 0;color:var(--muted);font-size:.96rem}

/* Footer */
footer{border-top:1px solid var(--border);padding:20px 0;text-align:center;color:var(--muted);font-size:.9rem;margin-top:40px}

/* Responsive */
@media(max-width:700px){
.hero-section h1{font-size:2.1rem}
.hero-section .sub{font-size:1rem}
.nav-links{gap:14px}
}