:root{
  --bg:#0f1412;
  --text:#0f1412;
  --muted:#6b7280;
  --panel:#f8faf9;
  --primary:#116e5a;      /* deep green */
  --accent:#ffd60a;       /* yellow */
  --grey:#f2f3f5;
  --border:#e5e7eb;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial,sans-serif;line-height:1.6;color:var(--text);background:#ffffff}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
a{color:var(--primary);text-decoration:none}
.btn{display:inline-block;border:1px solid var(--primary);padding:.7rem 1rem;border-radius:10px}
.btn.primary{background:var(--primary);color:#fff}
.btn.ghost{background:transparent}
.site-header{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--border);z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;gap:10px;align-items:center;font-weight:700;color:#0b3d2f}
.brand img{height:32px}
.nav nav a{margin:0 10px;padding:8px 10px;border-radius:8px}
.nav nav a:hover{background:var(--grey)}
.hero,.sub-hero{background:#f7f7f7 url('/assets/images/banner-home.jpg') center/cover no-repeat;color:#0f1412}
.hero .hero-inner{padding:120px 0}
.sub-hero .container{padding:80px 0}
.features,.cards-3,.grid-3{display:grid;gap:20px}
.features{grid-template-columns:repeat(3,1fr);margin:40px auto}
.cards-3{grid-template-columns:repeat(3,1fr);margin:20px auto}
.card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:18px;box-shadow:0 10px 18px rgba(0,0,0,.04)}
.card.big ul{padding-left:18px}
.site-footer{margin-top:40px;padding:30px 0;border-top:1px solid var(--border);background:#fff}
.footer-grid{display:grid;grid-template-columns:2fr 2fr 1fr;gap:12px;align-items:center}
.back-btn{position:fixed;left:20px;bottom:20px;border-radius:999px;border:1px solid var(--border);background:#fff;padding:10px 12px}
#scrollTopBtn{position:fixed;right:20px;bottom:20px;border-radius:999px;border:1px solid var(--border);background:#fff;padding:10px 12px}
/* Dashboard */
.panel{background:#fff;border:1px solid var(--border);border-radius:16px;padding:16px}
.grid-3{grid-template-columns:2fr 1fr 1fr;margin:20px auto}
.status .dot{display:inline-block;width:10px;height:10px;border-radius:999px;background:var(--muted)}
.status .dot.green{background:#22c55e}
.log,.event-log{height:160px;overflow:auto;background:var(--grey);border-radius:10px;padding:8px}
.map{height:320px}
.map .map-note{font-size:.85rem;color:var(--muted);margin-top:8px}
.form label{display:block;margin-bottom:10px}
.form input,.form select,.form textarea{width:100%;padding:.7rem;border:1px solid var(--border);border-radius:10px}
.form-actions{display:flex;gap:10px;align-items:center}
.status-area{margin-top:8px;padding:10px;border-radius:10px;background:#f3f4f6}
.status-area.error{background:#fee2e2}
/* Banners for sub pages */
.page-banner{width:100%;height:300px;border-radius:18px;object-fit:cover;border:1px solid var(--border);box-shadow:0 10px 18px rgba(0,0,0,.04)}
.sub-hero{background:none}
/* Responsive */
@media (max-width:900px){
  .features,.cards-3,.grid-3,.footer-grid{grid-template-columns:1fr}
  .hero .hero-inner{padding:80px 0}
}
/* === Responsive Optimization for Android Devices === */

.page-banner {
  width: 100%;
  height: auto;
  max-height: 360px;
  object-fit: cover;
  border-radius: 18px;
  border: 1px solid var(--border);
  box-shadow: 0 10px 18px rgba(0, 0, 0, .04);
  display: block;
  margin: 0 auto;
}

/* ---------- Small Android Phones (width ≤ 480px) ---------- */
@media (max-width: 480px) {
  .page-banner {
    max-height: 200px;
    border-radius: 12px;
  }

  .sub-hero .container {
    padding: 28px 12px;
  }

  .sub-hero h1 {
    font-size: 1.4rem;
    line-height: 1.3;
    text-align: center;
  }

  .sub-hero p {
    font-size: 0.95rem;
    text-align: center;
  }

  .card,
  .two-col .card {
    margin-bottom: 16px;
  }
}

/* ---------- Medium Android Devices (481px–720px) ---------- */
@media (min-width: 481px) and (max-width: 720px) {
  .page-banner {
    max-height: 260px;
    border-radius: 14px;
  }

  .sub-hero .container {
    padding: 40px 16px;
  }

  .sub-hero h1 {
    font-size: 1.7rem;
  }

  .sub-hero p {
    font-size: 1rem;
  }
}

/* ---------- Large Android Devices / Tablets (721px–1024px) ---------- */
@media (min-width: 721px) and (max-width: 1024px) {
  .page-banner {
    max-height: 320px;
    border-radius: 16px;
  }

  .sub-hero .container {
    padding: 50px 24px;
  }

  .sub-hero h1 {
    font-size: 2rem;
  }

  .sub-hero p {
    font-size: 1.05rem;
  }
}

/* ---------- Orientation-based Adjustments ---------- */
@media (orientation: landscape) and (max-height: 500px) {
  .page-banner {
    max-height: 180px;
  }

  .sub-hero .container {
    padding: 20px 12px;
  }

  .sub-hero h1 {
    font-size: 1.3rem;
  }
}