/* Modern Black Website Design System */
        :root {
            /* Core dark theme colors */
            --background: 0 0% 3%;
            --foreground: 0 0% 98%;
            --card: 0 0% 6%;
            --card-foreground: 0 0% 95%;
            --popover: 0 0% 4%;
            --popover-foreground: 0 0% 98%;
            
            /* Electric blue primary */
            --primary: 212 100% 50%;
            --primary-foreground: 0 0% 100%;
            --primary-glow: 212 100% 60%;
            
            /* Dark secondary */
            --secondary: 0 0% 12%;
            --secondary-foreground: 0 0% 90%;
            
            /* Muted grays */
            --muted: 0 0% 8%;
            --muted-foreground: 0 0% 65%;
            
            /* Accent - bright electric */
            --accent: 180 100% 50%;
            --accent-foreground: 0 0% 10%;
            
            --destructive: 0 84% 60%;
            --destructive-foreground: 0 0% 98%;
            --border: 0 0% 15%;
            --input: 0 0% 12%;
            --ring: 212 100% 50%;
            --radius: 0.75rem;
            
            /* Custom design tokens */
            --hero-gradient: linear-gradient(135deg, hsl(0 0% 3%), hsl(0 0% 8%));
            --card-gradient: linear-gradient(135deg, hsl(0 0% 6%), hsl(0 0% 10%));
            --glow-primary: 0 0 40px hsl(212 100% 50% / 0.3);
            --glow-accent: 0 0 40px hsl(180 100% 50% / 0.2);
            --shadow-elegant: 0 10px 30px -10px hsl(0 0% 0% / 0.5);
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-glow: box-shadow 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            background: var(--hero-gradient);
            color: hsl(var(--foreground));
            font-family: system-ui, -apple-system, sans-serif;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        /* Utility Classes */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        .hero-text {
            font-size: clamp(3rem, 8vw, 8rem);
            font-weight: 700;
            line-height: 1;
            background: linear-gradient(135deg, hsl(var(--foreground)), hsl(var(--muted-foreground)));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: var(--radius);
            font-weight: 600;
            text-decoration: none;
            border: none;
            cursor: pointer;
            transition: var(--transition-smooth);
            font-size: 1rem;
        }

        .btn-hero {
            background: hsl(var(--primary));
            color: hsl(var(--primary-foreground));
            box-shadow: var(--glow-primary);
        }

        .btn-hero:hover {
            background: hsl(var(--primary-glow));
            box-shadow: var(--glow-primary);
            transform: translateY(-2px);
        }

        .btn-ghost {
            border: 1px solid hsl(var(--muted-foreground) / 0.3);
            color: hsl(var(--foreground));
            backdrop-filter: blur(8px);
        }

        .btn-ghost:hover {
            border-color: hsl(var(--primary));
            color: hsl(var(--primary));
            box-shadow: var(--glow-primary);
        }

        .card {
            background: var(--card-gradient);
            border: 1px solid hsl(var(--border));
            border-radius: var(--radius);
            padding: 1.5rem;
            box-shadow: var(--shadow-elegant);
            transition: var(--transition-smooth);
        }

        .card:hover {
            transform: scale(1.05);
            box-shadow: var(--shadow-elegant), var(--glow-primary);
        }

        .badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            background: hsl(var(--secondary));
            color: hsl(var(--secondary-foreground));
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
        }

        .glow-primary {
            box-shadow: var(--glow-primary);
        }

        .glow-accent {
            box-shadow: var(--glow-accent);
        }

        /* Navigation */
        .nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            transition: var(--transition-smooth);
            padding: 0 1.5rem;
        }

        .nav.scrolled {
            background: hsl(var(--background) / 0.8);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid hsl(var(--border) / 0.5);
            box-shadow: var(--shadow-elegant);
        }

        .nav-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 4rem;
            max-width: 1400px;
            margin: 0 auto;
        }

        .logo {
            font-size: 1.25rem;
            font-weight: 700;
        }

        .nav-menu {
            display: none;
            align-items: center;
            gap: 2rem;
        }

        .nav-item {
            position: relative;
            padding: 0.5rem 0.75rem;
            color: hsl(var(--muted-foreground));
            text-decoration: none;
            font-weight: 500;
            font-size: 0.875rem;
            transition: var(--transition-smooth);
            background: none;
            border: none;
            cursor: pointer;
        }

        .nav-item:hover {
            color: hsl(var(--foreground));
        }

        .nav-item.active {
            color: hsl(var(--primary));
        }

        .nav-item.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: hsl(var(--primary));
            border-radius: 9999px;
            animation: fadeIn 0.3s ease-out;
        }

        @media (min-width: 768px) {
            .nav-menu {
                display: flex;
            }
        }

        /* Sections */
        .section {
            padding: 6rem 1.5rem;
        }

        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
            background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1920 1080"><defs><linearGradient id="bg" x1="0%" y1="0%" x2="100%" y2="100%"><stop offset="0%" style="stop-color:%23000000"/><stop offset="100%" style="stop-color:%23111111"/></linearGradient></defs><rect width="1920" height="1080" fill="url(%23bg)"/><g opacity="0.1"><circle cx="300" cy="200" r="2" fill="%2300bfff"/><circle cx="800" cy="400" r="1" fill="%2300ffff"/><circle cx="1200" cy="300" r="1.5" fill="%2300bfff"/><circle cx="600" cy="700" r="1" fill="%2300ffff"/><circle cx="1500" cy="600" r="2" fill="%2300bfff"/></g></svg>');
            background-image: url('hero-bg.jpg');
  background: 
    linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), /* priehľadný filter */
    url('hero-bg.jpg');
  background-size: cover;
  background-position: center;
            background-size: cover;
            background-position: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 25%;
            left: 25%;
            width: 24rem;
            height: 24rem;
            background: radial-gradient(circle, hsl(var(--primary) / 0.2), transparent 70%);   
            border-radius: 50%;
            filter: blur(3rem);
            opacity: 0.2;
        }   

        .hero::after {
            content: '';
            position: absolute;
            bottom: 25%;
            right: 25%;
            width: 24rem;
            height: 24rem;
            background: radial-gradient(circle, hsl(var(--accent) / 0.2), transparent 70%);
            border-radius: 50%;
            filter: blur(3rem);
            opacity: 0.15;
        }

        .hero-content {
            position: relative;
            z-index: 10;
            text-align: center;
            max-width: 64rem;
        }

        .hero-buttons {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            justify-content: center;
            margin-top: 2rem;
        }

        @media (min-width: 640px) {
            .hero-buttons {
                flex-direction: row;
            }
        }

        .scroll-indicator {
            position: absolute;
            bottom: 2rem;
            left: 50%;
            transform: translateX(-50%);
            animation: bounce 2s infinite;
        }

        .scroll-indicator div {
            width: 1.5rem;
            height: 2.5rem;
            border: 2px solid hsl(var(--muted-foreground));
            border-radius: 9999px;
            display: flex;
            justify-content: center;
        }

        .scroll-indicator div::after {
            content: '';
            width: 0.25rem;
            height: 0.75rem;
            background: hsl(var(--muted-foreground));
            border-radius: 9999px;
            margin-top: 0.5rem;
            animation: pulse 2s infinite;
        }

        .features-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            margin-top: 4rem;
        }

        @media (min-width: 768px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        .feature-icon {
            width: 3rem;
            height: 3rem;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid hsl(var(--primary) / 0.1);
            margin-bottom: 1rem;
        }

        .feature-icon.primary {
            background: linear-gradient(135deg, hsl(var(--primary) / 0.2), hsl(var(--primary) / 0.05));
        }

        .feature-icon.accent {
            background: linear-gradient(135deg, hsl(var(--accent) / 0.2), hsl(var(--accent) / 0.05));
            border-color: hsl(var(--accent) / 0.1);
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 3rem;
            align-items: center;
        }

        @media (min-width: 1024px) {
            .about-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .stat {
            text-align: center;
        }

        .stat-number {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 3rem;
        }

        @media (min-width: 1024px) {
            .contact-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        .form-group {
            margin-bottom: 1rem;
        }

        .form-control {
            width: 100%;
            padding: 0.75rem;
            background: hsl(var(--input));
            border: 1px solid hsl(var(--border));
            border-radius: var(--radius);
            color: hsl(var(--foreground));
            font-size: 1rem;
        }

        .form-control:focus {
            outline: none;
            border-color: hsl(var(--primary));
            box-shadow: 0 0 0 2px hsl(var(--primary) / 0.2);
        }

        .form-control::placeholder {
            color: hsl(var(--muted-foreground));
        }

        textarea.form-control {
            min-height: 8rem;
            resize: vertical;
        }

        .contact-info {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1rem;
        }

        .contact-icon {
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
        }

        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }

        .footer-info {
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid hsl(var(--border));
            display: flex;
            flex-direction: column;
            gap: 1rem;
            align-items: center;
            text-align: center;
        }

        @media (min-width: 640px) {
            .footer-info {
                flex-direction: row;
                justify-content: space-between;
                text-align: left;
            }
        }

        .footer-links {
            display: flex;
            gap: 1.5rem;
            font-size: 0.875rem;
        }

        .footer-links a {
            color: hsl(var(--muted-foreground));
            text-decoration: none;
            transition: var(--transition-smooth);
        }

        .footer-links a:hover {
            color: hsl(var(--primary));
        }

        /* Animations */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        @keyframes bounce {
            0%, 20%, 53%, 80%, 100% { transform: translateX(-50%) translateY(0); }
            40%, 43% { transform: translateX(-50%) translateY(-30px); }
            70% { transform: translateX(-50%) translateY(-15px); }
            90% { transform: translateX(-50%) translateY(-4px); }
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.5; }
        }

        /* Background patterns */
        .bg-muted {
            background: hsl(var(--muted) / 0.3);
        }

        .bg-card {
            background: hsl(var(--card) / 0.5);
        }

        /* Text styles */
        .text-primary { color: hsl(var(--primary)); }
        .text-accent { color: hsl(var(--accent)); }
        .text-muted { color: hsl(var(--muted-foreground)); }
        .text-xl { font-size: 1.25rem; }
        .text-2xl { font-size: 1.5rem; }
        .text-4xl { font-size: 2.25rem; }
        .text-5xl { font-size: 3rem; }
        .font-bold { font-weight: 700; }
        .font-semibold { font-weight: 600; }
        .leading-relaxed { line-height: 1.625; }
        .mb-2 { margin-bottom: 0.5rem; }
        .mb-4 { margin-bottom: 1rem; }
        .mb-6 { margin-bottom: 1.5rem; }
        .mb-8 { margin-bottom: 2rem; }
        .mt-4 { margin-top: 1rem; }
        .space-y-2 > * + * { margin-top: 0.5rem; }
        .space-y-4 > * + * { margin-top: 1rem; }
        .space-y-6 > * + * { margin-top: 1.5rem; }


/* === Hamburger & Mobile Menu === */
.hamburger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background: hsl(var(--card) / 0.6);
  cursor: pointer;
  padding: 8px;
  transition: var(--transition-smooth);
}

.hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: hsl(var(--foreground));
  transition: var(--transition-smooth);
}

/* Hide CTA on small screens if present */
@media (max-width: 767px) {
  .nav .btn-hero {
    display: none;
  }
  .hamburger {
    display: inline-flex;
  }
}

/* On larger screens hide hamburger (menu is inline) */
@media (min-width: 768px) {
  .hamburger {
    display: none;
  }
}

/* Mobile menu panel */
.nav.open .nav-menu {
  display: flex;                /* override default display:none on small screens */
  position: fixed;
  top: 4rem;                    /* height of .nav-content */
  left: 0;
  right: 0;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem 1.5rem 1.5rem;
  background: hsl(var(--background) / 0.95);
  border-bottom: 1px solid hsl(var(--border) / 0.6);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-elegant);
  z-index: 40;
}

/* Items in mobile menu */
.nav.open .nav-item {
  text-align: left;
  font-size: 1rem;
  padding: 0.75rem 0;
  width: 100%;
  border: none;
}

/* Hamburger to X animation */
.nav.open .hamburger span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav.open .hamburger span:nth-child(2) {
  opacity: 0;
}
.nav.open .hamburger span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Prevent body scroll when menu open */
body.no-scroll {
  overflow: hidden;
}


/* === Keep "Požiadať o demo" visible on mobile === */
@media (max-width: 767px) {
  .nav .btn-hero {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    margin-left: auto; /* posunie tlačidlo doprava v rámci .nav-content */
  }
}