:root {
  --mbh-blue: #0055A5;
  --sky: #F5FAFF;
  --text: #0f172a;
  --muted: #475569;
  --card: #fff;
  --shadow: 0 10px 30px rgba(0,0,0,.08);
  --radius: 18px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Poppins,system-ui,sans-serif;color:var(--text);background:var(--sky);scroll-behavior:smooth}
img{max-width:100%;display:block}
a{color:var(--mbh-blue);text-decoration:none}
a:hover{opacity:.85}

/* Header */
header{position:sticky;top:0;z-index:50;backdrop-filter:saturate(180%) blur(12px);background:rgba(255,255,255,.8);border-bottom:1px solid rgba(15,23,42,.06)}
.container{max-width:1100px;margin:auto;padding:0 20px}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--mbh-blue)}
.brand img{width:36px;height:36px;border-radius:10px}
nav ul{display:flex;align-items:center;gap:18px;list-style:none;margin:0;padding:0}
.cta{padding:10px 18px;border-radius:999px;background:var(--mbh-blue);color:#fff;font-weight:600;box-shadow:var(--shadow);display:inline-flex;align-items:center;gap:8px}

/* Hero */
.hero{display:flex;flex-direction:column;align-items:center;text-align:center;padding:60px 20px}
.hero-inner{max-width:720px}
.hero h1{font-size:clamp(26px,4.2vw,44px);margin-bottom:10px;animation:fadeUp 1s ease both}
.hero p{color:var(--muted);font-size:18px;line-height:1.6;margin-bottom:24px;animation:fadeUp 1s .2s ease both}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.btn{padding:12px 18px;border-radius:12px;border:1px solid rgba(0,0,0,.08);background:#fff;font-weight:600}
.btn.primary{background:var(--mbh-blue);color:#fff;border-color:transparent}
.btn.primary:hover{opacity:.9}
.hero-img{max-width:480px;border-radius:var(--radius);box-shadow:var(--shadow);margin-top:30px;animation:fadeUp 1s .3s ease both}

/* Sections */
section{padding:40px 0}
.container h2{text-align:center;font-size:clamp(22px,3vw,30px);margin-bottom:20px}
.card{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin:10px auto;max-width:700px;text-align:center}

/* Footer */
footer{background:#0B2542;color:#e6edf7;margin-top:40px}
footer .container{padding:28px 20px;text-align:center}
footer a{color:#e6edf7;text-decoration:underline;text-decoration-color:rgba(230,237,247,.3)}

/* Floating WA */
.float-wa{position:fixed;right:16px;bottom:16px;z-index:60}
.float-wa a{display:inline-flex;align-items:center;gap:10px;background:#25D366;color:#fff;padding:12px 16px;border-radius:999px;font-weight:700;box-shadow:0 8px 20px rgba(0,0,0,.18)}
.float-wa img{width:20px;height:20px}

/* Fade Animation */
@keyframes fadeUp {
  from {opacity:0;transform:translateY(20px);}
  to {opacity:1;transform:translateY(0);}
}

/* Responsive */
@media (max-width:768px){
  nav ul{display:none}
  .hero p{font-size:16px}
  .card{padding:16px}
}

/* === Responsive Fix for Mobile Header (≤768px) === */
@media (max-width: 768px) {
  .nav {
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
    gap: 10px;
    height: auto;
    padding: 10px 0;
  }

  .brand {
    flex: 1 1 100%;
    justify-content: center;
  }

  .brand img {
    width: 32px;
    height: 32px;
  }

  nav ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    padding: 0;
    margin: 6px 0;
    gap: 12px;
  }

  nav ul li {
    display: inline-block;
  }

  nav ul li a {
    font-size: 15px;
    padding: 6px 8px;
  }

  .cta {
    flex: 1 1 100%;
    display: inline-block;
    text-align: center;
    margin-top: 4px;
    padding: 10px 18px;
  }
}