:root {
            --accent: #00f0ff;
            --accent-dark: #0099a6;
            --accent-hover: #38bdf8;
            --accent-yellow: #ffc107;
            --bg-primary: #070B14;
            --bg-secondary: #0D1424;
            --bg-tertiary: #111B2E;
            --text-primary: #f8fafc;
            --text-secondary: #94a3b8;
            --card-bg: rgba(17, 24, 39, 0.8);
            --card-border: rgba(255, 255, 255, 0.08);
            --border: rgba(255, 255, 255, 0.08);
            --nav-bg: rgba(7, 11, 20, 0.95);
            --nav-text: #f8fafc;
            --nav-border: rgba(255, 255, 255, 0.08);
            --transition: all 0.3s ease;
            --gutter: clamp(1rem, 4vw, 2rem);
        }

        /* Light Mode */
        html.light-mode,
        [data-theme="light"] {
            --bg-primary: #ffffff;
            --bg-secondary: #f8fafc;
            --bg-tertiary: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --card-bg: #ffffff;
            --card-border: #e2e8f0;
            --border: #e2e8f0;
            --nav-bg: rgba(255, 255, 255, 0.98);
            --nav-text: #0f172a;
            --nav-border: #e2e8f0;
            --accent: #0284C7;
            --accent-dark: #0369A1;
            --accent-hover: #0369A1;
            --accent-yellow: #d97706;
        }

        /* Dark Mode */
        html.dark-mode,
        [data-theme="dark"] {
            --bg-primary: #070B14;
            --bg-secondary: #0D1424;
            --bg-tertiary: #111B2E;
            --text-primary: #f8fafc;
            --text-secondary: #94a3b8;
            --card-bg: rgba(17, 24, 39, 0.8);
            --card-border: rgba(255, 255, 255, 0.08);
            --border: rgba(255, 255, 255, 0.08);
            --nav-bg: rgba(7, 11, 20, 0.95);
            --nav-text: #f8fafc;
            --nav-border: rgba(255, 255, 255, 0.08);
            --accent: #00f0ff;
            --accent-dark: #0099a6;
            --accent-hover: #38bdf8;
            --accent-yellow: #ffc107;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: 'Inter', sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            transition: background 0.3s ease, color 0.3s ease;
        }

        h1, h2, h3, h4 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.2;
        }

        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 var(--gutter);
        }

        /* Navigation */
        nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            padding: 0.25rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--nav-bg);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--nav-border);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }

        .logo {
            font-family: var(--font-heading);
            font-size: 1.1rem;
            font-weight: 800;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0;
        }

        .logo-gif {
            width: 100px;
            height: 100px;
            margin: -15px -10px -15px 0;
        }

        .logo-text {
            background: linear-gradient(135deg, var(--accent) 0%, #38bdf8 50%, var(--accent-yellow) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
        }

        .nav-links a {
            color: var(--nav-text);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }

        .nav-links a:hover {
            color: var(--accent);
        }

        /* Dropdown */
        .nav-dropdown {
            position: relative;
        }

        .nav-dropdown-toggle {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            cursor: pointer;
        }

        .dropdown-arrow {
            transition: transform 0.3s ease;
        }

        .nav-dropdown:hover .dropdown-arrow {
            transform: rotate(180deg);
        }

        .nav-dropdown-menu {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%) translateY(10px);
            min-width: 320px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 1rem;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
            z-index: 1001;
            backdrop-filter: blur(12px);
        }

        html.light-mode .nav-dropdown-menu,
        [data-theme="light"] .nav-dropdown-menu {
            background: #ffffff;
            border-color: #e2e8f0;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
        }

        .nav-dropdown:hover .nav-dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateX(-50%) translateY(0);
        }

        .dropdown-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1rem;
            border-radius: 12px;
            text-decoration: none;
            transition: all 0.3s ease;
            margin-bottom: 0.5rem;
        }

        .dropdown-item:hover {
            background: rgba(2, 132, 199, 0.08);
        }

        html.dark-mode .dropdown-item:hover,
        [data-theme="dark"] .dropdown-item:hover {
            background: rgba(0, 240, 255, 0.1);
        }

        .dropdown-item.active {
            background: rgba(2, 132, 199, 0.1);
            border: 1px solid rgba(2, 132, 199, 0.25);
        }

        html.dark-mode .dropdown-item.active,
        [data-theme="dark"] .dropdown-item.active {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(0, 240, 255, 0.05));
            border: 1px solid rgba(0, 240, 255, 0.3);
        }

        .dropdown-item-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(2, 132, 199, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        html.dark-mode .dropdown-item-icon,
        [data-theme="dark"] .dropdown-item-icon {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(0, 240, 255, 0.05));
        }

        .dropdown-item-icon svg {
            width: 24px;
            height: 24px;
            stroke: var(--accent);
        }

        .dropdown-item-content {
            display: flex;
            flex-direction: column;
        }

        .dropdown-item-title {
            font-weight: 700;
            color: var(--text-primary);
        }

        .dropdown-item-desc {
            font-size: 0.8rem;
            color: var(--text-secondary);
        }

        .nav-link-active {
            color: var(--accent) !important;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 1.8rem;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            font-size: 0.95rem;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(2, 132, 199, 0.3);
        }

        html.dark-mode .btn-primary:hover,
        [data-theme="dark"] .btn-primary:hover {
            box-shadow: 0 10px 30px rgba(0, 240, 255, 0.4);
        }

        .theme-toggle {
            background: transparent;
            border: 2px solid var(--nav-border);
            border-radius: 50%;
            width: 40px;
            height: 40px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-left: 1rem;
            transition: var(--transition);
        }

        .theme-toggle:hover {
            border-color: var(--accent);
        }

        .theme-toggle svg {
            width: 20px;
            height: 20px;
            fill: var(--nav-text);
        }

        /* Sun / Moon visibility */
        .theme-toggle .sun-icon { display: none; }
        .theme-toggle .moon-icon { display: block; }
        html.light-mode .theme-toggle .sun-icon,
        [data-theme="light"] .theme-toggle .sun-icon { display: block; }
        html.light-mode .theme-toggle .moon-icon,
        [data-theme="light"] .theme-toggle .moon-icon { display: none; }

        /* Hero */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 8rem 2rem;
            position: relative;
            background: var(--bg-primary);
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 50% 50%, rgba(2, 132, 199, 0.08), transparent 70%);
        }

        html.dark-mode .hero::before,
        [data-theme="dark"] .hero::before {
            background: radial-gradient(circle at 50% 50%, rgba(0, 240, 255, 0.1), transparent 70%);
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(2, 132, 199, 0.08);
            border: 1px solid rgba(2, 132, 199, 0.25);
            border-radius: 50px;
            padding: 0.5rem 1.25rem;
            margin-bottom: 2rem;
            font-size: 0.9rem;
            color: var(--accent);
            font-weight: 500;
        }

        html.dark-mode .hero-badge,
        [data-theme="dark"] .hero-badge {
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
        }

        .hero h1 {
            font-size: clamp(2.5rem, 6vw, 4.5rem);
            margin-bottom: 1.5rem;
            color: var(--text-primary);
        }

        .hero h1 .gradient-text {
            background: linear-gradient(135deg, var(--accent), #38bdf8, var(--accent-yellow));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: 1.25rem;
            color: var(--text-secondary);
            margin-bottom: 2.5rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }

        .hero-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-secondary {
            background: var(--card-bg);
            border: 1px solid var(--border);
            color: var(--text-primary);
        }

        .btn-secondary:hover {
            border-color: var(--accent);
            background: rgba(2, 132, 199, 0.06);
            color: var(--accent);
        }

        html.dark-mode .btn-secondary:hover,
        [data-theme="dark"] .btn-secondary:hover {
            background: rgba(0, 240, 255, 0.1);
            color: #ffffff;
        }

        /* Coming Soon */
        .coming-soon {
            padding: 6rem 2rem;
            text-align: center;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
        }

        .coming-soon h2 {
            font-size: 2rem;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .coming-soon p {
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        /* Footer */
        footer {
            padding: 2rem;
            text-align: center;
            background: var(--bg-primary);
            border-top: 1px solid var(--border);
        }

        footer p {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        footer a {
            color: var(--accent);
            text-decoration: none;
        }

        /* MySTI Certification Badge */
        .mysti-certification {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border);
        }

        .mysti-certification img {
            width: 50px;
            height: auto;
        }

        .mysti-certification span {
            font-size: 0.8rem;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .nav-links { display: none; }
            .mobile-menu-btn { display: block; }
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--nav-text);
            font-size: 1.5rem;
            cursor: pointer;
        }