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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #0c1445 0%, #1a237e 30%, #2a1810 60%, #000051 100%);
            color: #fff;
            min-height: 100vh;
            overflow-x: hidden;
            position: relative;
        }

        /* Enhanced animated background */
        .stars {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
        }

        .star {
            position: absolute;
            width: 3px;
            height: 3px;
            background: #00bcd4;
            border-radius: 50%;
            animation: twinkle 2s infinite;
            box-shadow: 0 0 10px #00bcd4;
        }

        .shooting-star {
            position: absolute;
            width: 100px;
            height: 2px;
            background: linear-gradient(90deg, transparent, #00bcd4, transparent);
            animation: shooting 3s linear infinite;
        }

        @keyframes twinkle {
            0%, 100% { opacity: 0.3; transform: scale(1); }
            50% { opacity: 1; transform: scale(1.2); }
        }

        @keyframes shooting {
            0% { transform: translateX(-100vw) translateY(100vh); opacity: 0; }
            10% { opacity: 1; }
            90% { opacity: 1; }
            100% { transform: translateX(100vw) translateY(-100vh); opacity: 0; }
        }

        /* Enhanced Header */
        .header {
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 1rem 2rem;
            background: rgba(0, 0, 0, 0.4);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(0, 188, 212, 0.3);
            position: sticky;
            top: 0;
            z-index: 100;
            flex-wrap: wrap;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 15px;
            animation: logoGlow 3s ease-in-out infinite alternate;
            min-width: 200px;
        }

        .logo-icon {
            width: 50px;
            height: 50px;
            background: linear-gradient(45deg, #00bcd4, #2196f3, #9c27b0);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 30px;
            box-shadow: 0 0 30px rgba(0, 188, 212, 0.6);
            animation: rotate 10s linear infinite;
        }

        .logo h1 {
            font-size: 28px;
            background: linear-gradient(45deg, #00bcd4, #2196f3, #9c27b0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 0 30px rgba(0, 188, 212, 0.5);
            font-weight: 700;
        }

        @keyframes logoGlow {
            from { filter: drop-shadow(0 0 10px rgba(0, 188, 212, 0.5)); }
            to { filter: drop-shadow(0 0 20px rgba(0, 188, 212, 0.8)); }
        }

        @keyframes rotate {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        .nav-menu {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            margin-left: 2rem;
        }

        .nav-link {
            color: white;
            text-decoration: none;
            padding: 12px 20px;
            border-radius: 25px;
            transition: all 0.4s ease;
            position: relative;
            white-space: nowrap;
            font-weight: 500;
            overflow: hidden;
        }

        .nav-link::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s ease;
        }

        .nav-link:hover::before {
            left: 100%;
        }

        .nav-link:hover, .nav-link.active {
            background: rgba(0, 188, 212, 0.2);
            color: #00bcd4;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 188, 212, 0.3);
        }

        .btn {
            padding: 12px 24px;
            border: none;
            border-radius: 30px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.4s ease;
            text-decoration: none;
            display: inline-block;
            white-space: nowrap;
            position: relative;
            overflow: hidden;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s ease;
        }

        .btn:hover::before {
            left: 100%;
        }

        .btn-primary {
            background: linear-gradient(45deg, #00bcd4, #2196f3, #9c27b0);
            color: white;
            box-shadow: 0 5px 20px rgba(0, 188, 212, 0.4);
        }

        .btn-secondary {
            background: transparent;
            color: #00bcd4;
            border: 2px solid #00bcd4;
        }

        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(0, 188, 212, 0.5);
        }

        /* Enhanced Main Content */
        .main-content {
            display: none;
            padding: 2rem;
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
            z-index: 5;
        }

        .main-content.active {
            display: block;
            animation: fadeInSlide 0.6s ease-out;
        }

        @keyframes fadeInSlide {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Enhanced Landing Page */
        .landing {
            text-align: center;
            padding: 4rem 2rem;
            max-width: 900px;
            margin: 0 auto;
        }

        .landing h2 {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            background: linear-gradient(45deg, #00bcd4, #2196f3, #9c27b0, #ff4081);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            animation: slideInUp 1s ease-out;
            font-weight: 800;
            letter-spacing: -1px;
        }

        .landing p {
            font-size: 1.3rem;
            margin-bottom: 3rem;
            opacity: 0.9;
            animation: slideInUp 1s ease-out 0.3s both;
            line-height: 1.6;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2.5rem;
            margin: 4rem 0;
        }

        .feature-card {
            background: rgba(0, 0, 0, 0.4);
            padding: 2.5rem;
            border-radius: 20px;
            border: 1px solid rgba(0, 188, 212, 0.3);
            backdrop-filter: blur(15px);
            transition: all 0.4s ease;
            animation: slideInUp 1s ease-out 0.6s both;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(0, 188, 212, 0.1) 0%, transparent 70%);
            opacity: 0;
            transition: opacity 0.4s ease;
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-card:hover {
            transform: translateY(-15px) scale(1.02);
            box-shadow: 0 15px 40px rgba(0, 188, 212, 0.4);
            border-color: #00bcd4;
        }

        .feature-icon {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            color: #00bcd4;
            filter: drop-shadow(0 0 10px rgba(0, 188, 212, 0.5));
            animation: bounce 2s ease-in-out infinite;
        }

        @keyframes bounce {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-10px); }
        }

        .feature-card h3 {
            font-size: 1.4rem;
            margin-bottom: 1rem;
            color: #fff;
            font-weight: 600;
        }

        .feature-card p {
            line-height: 1.6;
            opacity: 0.8;
        }

        /* Enhanced Search Section */
        .search-section {
            background: rgba(0, 0, 0, 0.4);
            padding: 2.5rem;
            border-radius: 20px;
            margin: 2rem 0;
            backdrop-filter: blur(15px);
            border: 1px solid rgba(0, 188, 212, 0.3);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .search-container {
            display: flex;
            gap: 15px;
            margin-bottom: 1.5rem;
        }

        .search-input {
            flex: 1;
            padding: 18px 25px;
            border: none;
            border-radius: 30px;
            background: rgba(255, 255, 255, 0.1);
            color: white;
            font-size: 16px;
            backdrop-filter: blur(10px);
            border: 2px solid rgba(0, 188, 212, 0.3);
            transition: all 0.3s ease;
        }

        .search-input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }

        .search-input:focus {
            outline: none;
            border-color: #00bcd4;
            box-shadow: 0 0 20px rgba(0, 188, 212, 0.4);
            background: rgba(255, 255, 255, 0.15);
        }

        .filters {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 1.5rem;
        }

        .filter-btn {
            padding: 10px 20px;
            background: rgba(0, 188, 212, 0.2);
            border: 2px solid #00bcd4;
            border-radius: 25px;
            color: #00bcd4;
            cursor: pointer;
            transition: all 0.3s ease;
            font-weight: 500;
        }

        .filter-btn.active, .filter-btn:hover {
            background: linear-gradient(45deg, #00bcd4, #2196f3);
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 188, 212, 0.3);
        }

        /* Enhanced Content Grid */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 2rem;
            margin: 2rem 0;
        }

        .content-card {
            background: rgba(0, 0, 0, 0.4);
            border-radius: 15px;
            padding: 2rem;
            border: 1px solid rgba(0, 188, 212, 0.3);
            backdrop-filter: blur(15px);
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
        }

        .content-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(0, 188, 212, 0.1), transparent);
            transition: left 0.5s ease;
        }

        .content-card:hover::before {
            left: 100%;
        }

        .content-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 35px rgba(0, 188, 212, 0.4);
            border-color: #00bcd4;
        }

        .content-card h3 {
            color: #00bcd4;
            margin-bottom: 1rem;
            font-size: 1.3rem;
            font-weight: 600;
        }

        /* Enhanced Footer */
        .footer {
            text-align: center;
            padding: 30px 20px;
            font-size: 1.1rem;
            background: rgba(0, 0, 0, 0.3);
            backdrop-filter: blur(10px);
            border-top: 1px solid rgba(0, 188, 212, 0.3);
            font-weight: 600;
            color: white;
            animation: fadeIn 2s ease-in-out;
            margin-top: 4rem;
        }

        .heart {
            color: #ff4081;
            display: inline-block;
            animation: heartBeat 1.5s ease-in-out infinite;
            font-size: 1.2rem;
        }

        @keyframes heartBeat {
            0%, 100% { transform: scale(1); }
            25% { transform: scale(1.1); }
            50% { transform: scale(1); }
            75% { transform: scale(1.05); }
        }

        /* Enhanced Notification */
        .notification {
            position: fixed;
            top: 30px;
            right: 30px;
            background: linear-gradient(45deg, #00bcd4, #2196f3);
            color: white;
            padding: 1.2rem 2rem;
            border-radius: 15px;
            box-shadow: 0 8px 25px rgba(0, 188, 212, 0.4);
            transform: translateX(400px);
            transition: all 0.4s ease;
            z-index: 1001;
            max-width: 350px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .notification.show {
            transform: translateX(0);
            animation: slideInShake 0.6s ease-out;
        }

        @keyframes slideInShake {
            0% { transform: translateX(400px); }
            60% { transform: translateX(-10px); }
            80% { transform: translateX(5px); }
            100% { transform: translateX(0); }
        }

        /* Particle System */
        .particles {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 1;
        }

        .particle {
            position: absolute;
            width: 4px;
            height: 4px;
            background: radial-gradient(circle, #00bcd4, transparent);
            border-radius: 50%;
            animation: particleFloat 4s linear infinite;
        }

        @keyframes particleFloat {
            0% { 
                transform: translateY(100vh) translateX(0px) scale(0);
                opacity: 0;
            }
            10% {
                opacity: 1;
                transform: scale(1);
            }
            90% {
                opacity: 1;
            }
            100% { 
                transform: translateY(-100px) translateX(100px) scale(0);
                opacity: 0;
            }
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .header {
                flex-direction: column;
                gap: 1rem;
                padding: 1rem;
            }

            .nav-menu {
                order: 3;
                width: 100%;
                justify-content: center;
            }

            .landing h2 {
                font-size: 2.5rem;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .search-container {
                flex-direction: column;
            }

            .content-grid {
                grid-template-columns: 1fr;
            }

            .main-content {
                padding: 1rem;
            }

            .ufo {
                width: 60px;
                height: 30px;
            }

            .ufo-body {
                width: 60px;
                height: 20px;
            }

            .ufo-dome {
                width: 30px;
                height: 15px;
            }

            .ufo-instructions {
                font-size: 0.8rem;
                padding: 10px;
            }
        }