/* styles.css — digabung, ringan, responsive */
:root{
  --brand:#0c2b4a;
  --accent:#0066ff;
  --muted:#777;
  --bg:#fafafa;
  --card:#fff;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%}
body{
  font-family:Inter, "Segoe UI", Roboto, Arial, sans-serif;
  background:var(--bg);
  color:#141414;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.6;
}
.container{max-width:1100px;margin:0 auto;padding:18px}
.header{
  background:var(--brand);
  color:#fff;padding:22px 18px;text-align:center;
}
.header .logo{display:block;margin:0 auto 10px;max-width:260px;width:80%;height:auto}
.header h1{margin:6px 0;font-size:20px}
.header p{margin:4px 0 10px;color:#dfeeff;font-size:14px}

.nav{background:#123b63;padding:10px;text-align:center}
.nav a{color:#fff;text-decoration:none;margin:0 8px;font-weight:600;font-size:14px}
.nav a:hover{opacity:.9}

.hero{
  display:flex;align-items:center;justify-content:center;padding:18px 0;
}
.banner{
  width:100%;display:flex;justify-content:center;padding:0 12px;
}
.banner img{width:100%;max-width:780px;height:auto;display:block;border-radius:8px;box-shadow:0 6px 18px rgba(12,43,74,0.08)}

.article{background:var(--card);border-radius:10px;padding:20px;margin:18px 0;box-shadow:0 6px 18px rgba(12,43,74,0.03)}
.article h2{color:var(--brand);margin-top:0}
.article p{margin:12px 0;color:#222}

.btn{
  display:inline-block;background:var(--accent);color:#fff;padding:12px 18px;border-radius:8px;text-decoration:none;font-weight:700;
  box-shadow:0 6px 12px rgba(0,102,255,0.18);transition:transform .12s ease, box-shadow .12s ease;
}
.btn:active{transform:translateY(2px) scale(.996);box-shadow:0 3px 6px rgba(0,102,255,0.12)}
.btn.secondary{background:#1e90ff}

.footer{padding:18px;text-align:center;color:var(--muted);font-size:14px}
.social{display:inline-flex;gap:10px;align-items:center;justify-content:center;margin-top:8px}
.social a{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;background:#fff;border:1px solid #eee;box-shadow:0 6px 12px rgba(0,0,0,0.03);text-decoration:none}
.social svg{width:18px;height:18px;display:block}

/* Responsive tweaks */
@media (max-width:720px){
  .header h1{font-size:18px}
  .banner img{max-width:95%}
  .article{padding:14px}
  .nav{padding:8px}
  .nav a{display:inline-block;margin:6px 6px;font-size:13px}
}