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

        body {
            font-family: 'Arial', sans-serif;
            color: #333;
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Header */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            padding: 15px 0;
            background: rgba(52, 73, 94, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: bold;
            color: white;
        }

        .logo-icon {
            width: 70px;
            height: 70px;
            background: url('../Image/logo.png') center center/contain no-repeat;
        }

        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
            align-items: center;
        }

        nav a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            font-size: 14px;
            transition: all 0.3s ease;
            position: relative;
            padding: 8px 0;
        }

        nav a:hover {
            color: #a29bfe;
        }

        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, #6c5ce7, #a29bfe);
            transition: width 0.3s ease;
        }

        nav a:hover::after {
            width: 100%;
        }

        /* Language selector */
        .language-selector {
            display: flex;
            align-items: center;
            gap: 5px;
            position: relative;
        }

        .flag {
    width: 24px;
    height: 16px;
    background: linear-gradient(transparent 40%, #C8102E 40% 60%, transparent 60%),
        linear-gradient(to right, transparent 45%, #C8102E 45% 55%, transparent 55%),
        linear-gradient(transparent 35%, #FFF 35% 65%, transparent 65%),
        linear-gradient(to right, transparent 42.25%, #FFF 42.25% 57.75%, transparent 42.25%),
        linear-gradient(25deg, transparent 47.5%, #C8102E 47.5% 52.5%, transparent 52.5%),
        linear-gradient(-25deg, transparent 47.5%, #C8102E 47.5% 52.5%, transparent 52.5%),
        linear-gradient(25deg, transparent 45%, #FFF 45% 55%, transparent 55%),
        linear-gradient(-25deg, transparent 45%, #FFF 45% 55%, transparent 55%);
    background-color: #012169;
    position: relative;
    cursor: pointer;
        }

        .flag::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                linear-gradient(45deg, transparent 45%, #C8102E 45%, #C8102E 55%, transparent 55%),
                linear-gradient(-45deg, transparent 45%, #C8102E 45%, #C8102E 55%, transparent 55%);
        }

        /* Dropdown menus */
        .dropdown {
            position: relative;
        }

        .dropdown-content {
            position: absolute;
            top: 100%;
            left: 0;
            background: rgba(52, 73, 94, 0.95);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            min-width: 200px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px);
            transition: all 0.3s ease;
            z-index: 1001;
        }

        .dropdown:hover .dropdown-content {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown-content a {
            display: block;
            padding: 12px 20px;
            color: #e2e8f0;
            text-decoration: none;
            transition: all 0.3s ease;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .dropdown-content a:last-child {
            border-bottom: none;
        }

        .dropdown-content a:hover {
            background: rgba(162, 155, 254, 0.1);
            color: #a29bfe;
            padding-left: 25px;
        }

        .language-selector:hover .dropdown-content {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        /* Mobile menu */
        .mobile-menu {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }

        .mobile-menu span {
            width: 25px;
            height: 3px;
            background: white;
            transition: all 0.3s ease;
        }

        /* Hero Section */
        .hero-section {
            height: 300px;
            background: url('../Image/certification.png') center center/cover no-repeat;
            position: relative;
            display: flex;
            align-items: center;
            margin-top: 70px;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.4);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 0 50px;
        }

        .hero-title {
            color: white;
            font-size: 48px;
            font-weight: 300;
            border-left: 4px solid white;
            padding-left: 20px;
        }

        /* Main Content */
        .main-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 60px 20px;
        }

        .intro-text {
            font-size: 16px;
            color: #333;
            margin-bottom: 40px;
            line-height: 1.6;
        }

        /* Certificate Check Section */
        .certificate-check-section {
            margin-bottom: 60px;
        }

        .section-title {
            font-size: 24px;
            font-weight: 600;
            color: #333;
            margin-bottom: 30px;
        }

        .check-container {
            background: linear-gradient(135deg, #a29bfe, #6c5ce7);
            border-radius: 15px;
            padding: 40px;
            max-width: 600px;
            color: white;
            position: relative;
            overflow: hidden;
        }

        .check-description {
            font-size: 16px;
            margin-bottom: 30px;
            line-height: 1.6;
        }

        .input-group {
            display: flex;
            gap: 15px;
            align-items: flex-end;
            flex-wrap: wrap;
        }

        .input-container {
            flex: 1;
            min-width: 250px;
        }

        .input-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.9);
        }

        .input-icon {
            margin-right: 5px;
        }

        .certificate-input {
            width: 100%;
            padding: 15px 20px;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            background: rgba(255, 255, 255, 0.95);
            color: #333;
            transition: all 0.3s ease;
        }

        .certificate-input:focus {
            outline: none;
            background: white;
            box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
        }

        .certificate-input::placeholder {
            color: #999;
        }

        .check-btn {
            background: #2c3e50;
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            min-width: 180px;
        }

        .check-btn:hover {
            background: #34495e;
            transform: translateY(-2px);
        }

        /* Result Section */
        .result-section {
            margin-top: 30px;
            padding: 20px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            display: none;
        }

        .result-section.show {
            display: block;
            animation: fadeIn 0.5s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        .result-success {
            color: #27ae60;
            font-weight: 600;
        }

        .result-error {
            color: #e74c3c;
            font-weight: 600;
        }

        /* Footer */
        .footer {
            background: #2c3e50;
            color: white;
            padding: 40px 20px 20px;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            opacity: 0.8;
        }

        .footer-logo .logo-icon {
            width: 25px;
            height: 25px;
            background: url('./Image/logo.png') center center/contain no-repeat;
        }

        .footer-links {
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: #cbd5e0;
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.3s ease;
        }

        .footer-links a:hover {
            color: #a29bfe;
        }

        .social-links {
            display: flex;
            gap: 15px;
        }

        .social-links a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .social-links a:hover {
            background: linear-gradient(45deg, #6c5ce7, #a29bfe);
            transform: translateY(-2px);
        }

        .copyright {
            width: 100%;
            text-align: center;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #94a3b8;
            font-size: 0.9rem;
        }

        /* Mobile Navigation */
        .mobile-nav {
            position: fixed;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100vh;
            background: rgba(5, 15, 25, 0.98);
            backdrop-filter: blur(20px);
            display: flex;
            flex-direction: column;
            padding: 80px 30px 30px;
            transition: left 0.3s ease;
            z-index: 999;
            overflow-y: auto;
        }

        .mobile-nav.active {
            left: 0;
        }

        .mobile-nav-section {
            margin-bottom: 25px;
        }

        .mobile-nav-title {
            color: white;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 15px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .mobile-nav-item {
            color: #cbd5e0;
            text-decoration: none;
            font-size: 15px;
            font-weight: 400;
            display: block;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s ease;
            font-style: italic;
        }

        .mobile-nav-item:hover {
            color: #a29bfe;
            padding-left: 10px;
        }

        .mobile-nav-item.active {
            color: #a29bfe;
            border-left: 3px solid #a29bfe;
            padding-left: 15px;
        }

        .mobile-language-section {
            margin-top: auto;
            padding-top: 20px;
        }

        .mobile-language-title {
            display: flex;
            align-items: center;
            gap: 10px;
            color: white;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 15px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .mobile-flag {
            width: 20px;
            height: 14px;
            background: linear-gradient(to bottom, #012169 33%, white 33%, white 66%, #C8102E 66%);
            position: relative;
        }

        .mobile-flag::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                linear-gradient(45deg, transparent 45%, #C8102E 45%, #C8102E 55%, transparent 55%),
                linear-gradient(-45deg, transparent 45%, #C8102E 45%, #C8102E 55%, transparent 55%);
        }

        /* Mobile Responsive */
        @media (max-width: 768px) {
            .nav-container {
                padding: 0 15px;
            }

            nav ul {
                display: none;
            }

            .mobile-menu {
                display: flex;
            }

            .hero-section {
                height: 250px;
                margin-top: 60px;
            }

            .hero-title {
                font-size: 28px;
                padding: 0 20px;
            }

            .hero-content {
                padding: 0 20px;
            }

            .main-content {
                padding: 30px 15px;
            }

            .check-container {
                padding: 25px;
            }

            .input-group {
                flex-direction: column;
                gap: 20px;
            }

            .input-container {
                min-width: 100%;
            }

            .check-btn {
                width: 100%;
            }

            .footer-content {
                flex-direction: column;
                text-align: center;
            }

            .footer-links {
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .hero-title {
                font-size: 24px;
            }

            .check-container {
                padding: 20px;
            }
        }