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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background: linear-gradient(to bottom right, #0f172a, #1e3a8a, #0f172a);
            color: #fff;
            min-height: 100vh;
        }

        /* Header */
        header {
            background: rgba(0, 0, 0, 0.2);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, #60a5fa, #a78bfa);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
        }

        .logo-text h1 {
            font-size: 1.25rem;
            font-weight: bold;
        }

        .logo-text h1 span {
            color: #60a5fa;
        }

        .logo-text p {
            font-size: 0.75rem;
            color: #9ca3af;
        }

        nav {
            display: flex;
            align-items: center;
            gap: 1.5rem;
        }

        nav a {
            color: #d1d5db;
            text-decoration: none;
            transition: color 0.3s;
            font-size: 0.95rem;
        }

        nav a:hover {
            color: #fff;
        }

        /* Language Switcher */
        .lang-switcher {
            display: flex;
            background: rgba(255, 255, 255, 0.1);
            padding: 2px;
            border-radius: 6px;
            margin-right: 0.5rem;
        }

        .lang-btn {
            background: none;
            border: none;
            color: #9ca3af;
            padding: 4px 8px;
            cursor: pointer;
            font-size: 0.7rem;
            font-weight: bold;
            border-radius: 4px;
            transition: 0.3s;
        }

        .lang-btn.active {
            background: #3b82f6;
            color: #fff;
        }

        .btn-primary {
            padding: 0.5rem 1rem;
            background: #3b82f6;
            color: #fff;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.3s;
            font-size: 0.9rem;
        }

        .btn-primary:hover {
            background: #2563eb;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
        }

        .mobile-menu {
            display: none;
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(12px);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 1rem;
        }

        .mobile-menu.active {
            display: block;
        }

        .mobile-menu nav {
            flex-direction: column;
            gap: 1rem;
        }

        /* Hero Section */
        .hero {
            position: relative;
            padding: 5rem 0;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 300px;
            background: linear-gradient(to bottom, rgba(59, 130, 246, 0.1), transparent);
        }

        .hero-content {
            position: relative;
            text-align: center;
            margin-bottom: 3rem;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(59, 130, 246, 0.2);
            border: 1px solid rgba(96, 165, 250, 0.3);
            border-radius: 9999px;
            padding: 0.5rem 1rem;
            margin-bottom: 1.5rem;
            font-size: 0.875rem;
            color: #93c5fd;
        }

        .hero h2 {
            font-size: 3.5rem;
            font-weight: bold;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }

        .gradient-text {
            background: linear-gradient(to right, #60a5fa, #a78bfa);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: 1.25rem;
            color: #d1d5db;
            margin-bottom: 2.5rem;
            max-width: 48rem;
            margin-left: auto;
            margin-right: auto;
        }

        /* Search Bar */
        .search-container {
            max-width: 48rem;
            margin: 0 auto 1rem;
            position: relative;
        }

        .search-bar {
            width: 100%;
            padding: 1rem 1rem 1rem 3rem;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 1rem;
            color: #fff;
            font-size: 1rem;
            transition: all 0.3s;
        }

        .search-bar:focus {
            outline: none;
            border-color: #60a5fa;
            background: rgba(255, 255, 255, 0.15);
        }

        .search-icon {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            color: #9ca3af;
            pointer-events: none;
        }

        .search-btn {
            position: absolute;
            right: 0.5rem;
            top: 50%;
            transform: translateY(-50%);
            padding: 0.5rem 1.5rem;
            background: #3b82f6;
            color: #fff;
            border: none;
            border-radius: 0.75rem;
            cursor: pointer;
            transition: background 0.3s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .popular-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            justify-content: center;
            align-items: center;
        }

        .tag {
            padding: 0.25rem 0.75rem;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 9999px;
            font-size: 0.875rem;
            color: #d1d5db;
            cursor: pointer;
            transition: all 0.3s;
        }

        /* Category Cards */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1rem;
            margin-top: 4rem;
        }

        .category-card {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 1rem;
            padding: 1.5rem;
            cursor: pointer;
            transition: all 0.3s;
        }

        .category-card:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(96, 165, 250, 0.5);
            transform: translateY(-2px);
        }

        .category-icon {
            width: 48px;
            height: 48px;
            border-radius: 0.75rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1rem;
            font-size: 1.5rem;
        }

        /* Sections */
        section { padding: 5rem 0; }
        .section-dark { background: rgba(0, 0, 0, 0.2); }
        .section-gradient { background: linear-gradient(to right, rgba(30, 58, 138, 0.2), rgba(91, 33, 182, 0.2)); }
        section h3 { font-size: 2rem; font-weight: bold; margin-bottom: 2rem; }

        /* Topics */
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1rem;
        }

        .topic-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 0.75rem;
            padding: 1.5rem;
            cursor: pointer;
            transition: 0.3s;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .topic-card:hover {
            background: rgba(59, 130, 246, 0.1);
            border-color: #60a5fa;
        }

        /* Regions */
        .regions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
        }

        .region-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 1rem;
            padding: 1.5rem;
            transition: 0.3s;
        }

        .region-card:hover { border-color: #60a5fa; transform: translateY(-2px); }
        .region-flag { font-size: 2.5rem; margin-bottom: 0.75rem; }
        .region-link { color: #60a5fa; display: flex; align-items: center; margin-top: 1rem; font-size: 0.875rem; }

        /* AI Features */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .feature-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 1rem;
            padding: 2rem;
        }

        /* Footer */
        footer { border-top: 1px solid rgba(255, 255, 255, 0.1); padding: 3rem 0; background: rgba(0, 0, 0, 0.4); }
        .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; }
        .footer-section h5 { margin-bottom: 1rem; }
        .footer-section ul { list-style: none; }
        .footer-section ul li { margin-bottom: 0.5rem; }
        .footer-section ul li a { color: #9ca3af; text-decoration: none; font-size: 0.875rem; }
        .footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); margin-top: 2rem; padding-top: 2rem; text-align: center; color: #9ca3af; font-size: 0.875rem; }

        @media (max-width: 768px) {
            nav { display: none; }
            .mobile-menu-btn { display: block; }
            .hero h2 { font-size: 2.2rem; }
        }