:root {
            --gold-primary: #c5a338;
            --gold-secondary: #e7c873;
            --gold-accent: #d4b15f;
            --deep-blue: #0a2540;
            --light-cream: #fef7f2;
            --light-gray: #f8f9fa;
            --dark-gray: #6c757d;
            --border-radius: 10px;
        }

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

        body {
            font-family: 'Inter', sans-serif;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            color: #333;
        }

        /* Modern Navbar System */
        .navbar {
            --gold-primary: #c5a338;
            --gold-hover: rgba(197, 163, 56, 0.12);
            --gold-active: rgba(197, 163, 56, 0.18);
            --text-primary: #1a1a1a;
            --text-secondary: #4a4a4a;

            background-color: #fff;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            padding: 12px 5%;
            transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease, background 0.4s ease;
            z-index: 1000;
            backdrop-filter: blur(8px);
            background-color: rgba(255, 255, 255, 0.86);
        }

        .navbar-brand {
            font-weight: 800;
            font-size: clamp(1.4rem, 2vw, 1.8rem);
            color: var(--text-primary);
            letter-spacing: 0.5px;
            text-transform: uppercase;
            position: relative;
            transition: color 0.3s ease;
        }

        .navbar-brand::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--gold-primary);
            transition: width 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
        }

        .navbar-brand:hover {
            color: var(--gold-primary);
        }

        .navbar-brand:hover::after {
            width: 100%;
        }

        .navbar-nav {
            gap: 4px;
        }

        .navbar-nav .nav-link {
            font-weight: 600;
            color: var(--text-secondary);
            padding: 10px 18px;
            transition: color 0.25s ease, background 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), transform 0.2s ease;
            border-radius: 10px;
            position: relative;
            overflow: hidden;
        }

        .navbar-nav .nav-link::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--gold-primary);
            z-index: -1;
            transform: scaleY(0);
            transform-origin: bottom;
            transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        .navbar-nav .nav-link:hover {
            color: var(--text-primary);
            background: var(--gold-hover);
            transform: translateY(-2px);
        }

        .navbar-nav .nav-link.active {
            color: var(--gold-primary) !important;
            font-weight: 700;
            background: var(--gold-active);
            box-shadow: inset 0 0 0 1px rgba(197, 163, 56, 0.25);
        }

        /* Hero Section */
        .hero-section {
            background: linear-gradient(135deg, var(--deep-blue) 0%, #1a3a5c 100%);
            padding: 120px 0 80px;
            color: white;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="20" cy="20" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="40" cy="80" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grain)"/></svg>');
            opacity: 0.3;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            background: linear-gradient(45deg, #fff, var(--gold-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            color: rgba(255, 255, 255, 0.9);
            line-height: 1.6;
        }

        /* Certificate Form */
        .certificate-form {
            background: white;
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            padding: 40px;
            margin: -60px auto 0;
            position: relative;
            z-index: 10;
            max-width: 900px;
        }

        .form-section {
            margin-bottom: 40px;
        }

        .form-section h3 {
            color: var(--deep-blue);
            margin-bottom: 20px;
            font-weight: 600;
            border-bottom: 3px solid var(--gold-primary);
            padding-bottom: 10px;
        }

        .form-control {
            border: 2px solid #e9ecef;
            border-radius: 10px;
            padding: 15px;
            font-size: 16px;
            transition: all 0.3s ease;
        }

        .form-control:focus {
            border-color: var(--gold-primary);
            box-shadow: 0 0 0 0.2rem rgba(197, 163, 56, 0.25);
        }

        .form-select {
            border: 2px solid #e9ecef;
            border-radius: 10px;
            padding: 15px;
            font-size: 16px;
            transition: all 0.3s ease;
        }

        .form-select:focus {
            border-color: var(--gold-primary);
            box-shadow: 0 0 0 0.2rem rgba(197, 163, 56, 0.25);
        }

        .btn-primary {
            background: linear-gradient(45deg, var(--gold-primary), var(--gold-secondary));
            border: none;
            border-radius: 10px;
            padding: 15px 30px;
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s ease;
            box-shadow: 0 5px 15px rgba(197, 163, 56, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(197, 163, 56, 0.4);
        }

        /* Features Section */
        .features-section {
            padding: 80px 0;
            background: white;
        }

        .feature-card {
            background: white;
            border-radius: 15px;
            padding: 40px 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            text-align: center;
            height: 100%;
        }

        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }

        .feature-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(45deg, var(--gold-primary), var(--gold-secondary));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 2rem;
            color: white;
        }

        .feature-card h4 {
            color: var(--deep-blue);
            margin-bottom: 15px;
            font-weight: 600;
        }

        .feature-card p {
            color: var(--dark-gray);
            line-height: 1.6;
        }

        /* Footer */
        .footer-dark {
            background-color: var(--deep-blue);
            color: white;
            position: relative;
            overflow: hidden;
        }

        .footer-dark::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--gold-primary), var(--gold-secondary));
        }

        .social-icon {
            color: #fff;
            background-color: rgba(255, 255, 255, 0.1);
            width: 45px;
            height: 45px;
            border-radius: 50%;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            text-decoration: none;
        }

        .social-icon:hover {
            background-color: var(--gold-primary);
            color: var(--deep-blue);
            transform: translateY(-5px);
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }

            .certificate-form {
                margin: -40px 20px 0;
                padding: 30px 20px;
            }

            .navbar {
                padding: 12px 7%;
            }

            .feature-card {
                padding: 30px 20px;
                margin-bottom: 30px;
            }
        }