:root {
    --bg: #000000;
    --fg: #ffffff;
    --neon: #00ff00;
    --muted: #6b6b6b;
    --card: #0b0b0b;
    --border: #1a1a1a;
    --shadow: 0 0 20px rgba(0,255,0,0.15);
}
* { box-sizing: border-box }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--fg); font-family: 'Roboto Mono', monospace }
.container { width: 100%; max-width: 1100px; margin: 0 auto; padding: 20px }
.site-header { position: sticky; top: 0; background: rgba(0,0,0,0.8); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); z-index: 10 }
.nav { display: flex; align-items: center; justify-content: space-between }
.logo { font-family: 'Orbitron', sans-serif; color: var(--fg); text-decoration: none; font-weight: 800; letter-spacing: 2px; display: flex; align-items: center; transition: all 0.3s ease; font-size: 18px; }
.logo span { color: var(--neon); text-shadow: 0 0 8px var(--neon); }
.logo:hover { transform: scale(1.05); }
.logo:hover span { text-shadow: 0 0 12px var(--neon); }
nav a { color: var(--fg); text-decoration: none; margin: 0 10px; opacity: 0.8 }
nav a:hover { opacity: 1 }
.btn { border: 1px solid var(--neon); color: var(--neon); padding: 8px 14px; border-radius: 6px; text-decoration: none; margin-left: 6px }
.btn.primary { background: var(--neon); color: #000; text-shadow: none; box-shadow: var(--shadow) }
.hero { padding: 60px 0; display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 20px; align-items: center }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 18px; box-shadow: var(--shadow) }
.kpi { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px }
.kpi .card h3 { color: var(--neon); margin: 0 0 6px }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px }
.site-footer { border-top: 1px solid var(--border); opacity: 0.8 }
input, select, button, textarea { background: #0e0e0e; border: 1px solid var(--border); color: var(--fg); padding: 10px; border-radius: 8px; width: 100% }
label { display: block; margin: 10px 0 6px; color: var(--muted) }
form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px }
table { width: 100%; border-collapse: collapse }
th, td { padding: 10px; border-bottom: 1px solid var(--border) }
.auth-card { max-width: 520px; margin: 40px auto }
/* Responsive navigation and layouts */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr }
  .grid { grid-template-columns: 1fr }
  .kpi { grid-template-columns: 1fr 1fr }
  .nav { flex-direction: column; align-items: flex-start; gap: 10px }
  header nav { width: 100%; display: flex; flex-wrap: wrap; gap: 8px }
  header nav a, header nav .btn { margin: 4px 6px 0 0 }
}

/* Two-column split sections with image */
.split { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 16px; align-items: center }
.split img { width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--border); box-shadow: var(--shadow) }
@media (max-width: 900px) { .split { grid-template-columns: 1fr } }

/* Logo Responsive Design */
@media (max-width: 768px) {
  .logo { font-size: 16px !important; }
}

@media (max-width: 480px) {
  .logo { font-size: 14px !important; }
}

@media (max-width: 360px) {
  .logo { font-size: 12px !important; }
}

/* Mobile overlay fix - ensure clean background */
@media (max-width: 768px) {
  body {
    background: #000000 !important;
    background-image: none !important;
    background-color: #000000 !important;
  }
  
  html {
    background: #000000 !important;
    background-image: none !important;
    background-color: #000000 !important;
  }
  
  /* Remove any potential overlays */
  body::before,
  body::after,
  html::before,
  html::after {
    display: none !important;
    content: none !important;
  }
  
  /* Ensure main container has clean background */
  .container {
    background: transparent !important;
  }
  
  /* Fix any potential green overlays */
  .card {
    background: var(--card) !important;
  }
}