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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background: linear-gradient(135deg, #0d1117 0%, #161b22 100%);
            min-height: 100vh;
            overflow: hidden;
            position: relative;
        }

        /* Animated background particles */
        .particles {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
        }

        .particle {
            position: absolute;
            background: rgba(58, 255, 118, 0.1);
            border-radius: 50%;
            animation: float 6s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px) rotate(0deg); opacity: 0.7; }
            50% { transform: translateY(-20px) rotate(180deg); opacity: 1; }
        }

        /* Main container */
        .container {
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            position: relative;
            z-index: 10;
            padding: 2rem;
        }

        /* Logo/Brand section */
        .logo {
            font-size: 3rem;
            font-weight: 800;
            color: #3aff76;
            margin-bottom: 1rem;
            opacity: 0;
            transform: translateY(30px);
            animation: slideUp 1s ease-out 0.5s forwards;
        }

        .subtitle {
            font-size: 1.2rem;
            color: rgba(139, 148, 158, 0.8);
            text-align: center;
            margin-bottom: 3rem;
            opacity: 0;
            transform: translateY(30px);
            animation: slideUp 1s ease-out 0.8s forwards;
        }

        /* Transition button */
        .transition-btn {
            background: rgba(58, 255, 118, 0.15);
            backdrop-filter: blur(20px);
            border: 2px solid rgba(58, 255, 118, 0.3);
            color: #3aff76;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            position: relative;
            overflow: hidden;
            opacity: 0;
            transform: translateY(30px);
            animation: slideUp 1s ease-out 1.1s forwards;
        }

        .transition-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(58, 255, 118, 0.2);
            background: rgba(58, 255, 118, 0.25);
        }

        .transition-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(58, 255, 118, 0.3), transparent);
            transition: left 0.5s;
        }

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

        /* Progress indicator */
        .progress-container {
            position: fixed;
            bottom: 3rem;
            left: 50%;
            transform: translateX(-50%);
            display: none;
            flex-direction: column;
            align-items: center;
            gap: 1rem;
        }

        .progress-bar {
            width: 200px;
            height: 4px;
            background: rgba(58, 255, 118, 0.2);
            border-radius: 2px;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #00d4ff, #3aff76);
            width: 0%;
            transition: width 2s ease-out;
            border-radius: 2px;
        }

        .progress-text {
            color: #8b949e;
            font-size: 0.9rem;
            opacity: 0.8;
        }

        /* Overlay transition */
        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, #0d1117, #161b22, #21262d, #2d333b);
            background-size: 400% 400%;
            animation: gradientShift 3s ease infinite;
            opacity: 0;
            visibility: hidden;
            z-index: 1000;
            display: flex;
            justify-content: center;
            align-items: center;
            transition: all 0.5s ease;
        }

        .overlay.active {
            opacity: 1;
            visibility: visible;
        }

        @keyframes gradientShift {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        .overlay-content {
            text-align: center;
            color: #3aff76;
            font-size: 2rem;
            font-weight: 700;
            opacity: 0;
            transform: scale(0.8);
            transition: all 0.5s ease 0.2s;
        }

        .overlay.active .overlay-content {
            opacity: 1;
            transform: scale(1);
        }

        /* New page content */
        .new-page {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #0d1117, #161b22);
            opacity: 0;
            visibility: hidden;
            z-index: 500;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: #c9d1d9;
            text-align: center;
            padding: 2rem;
            transition: all 0.5s ease;
        }

        .new-page.active {
            opacity: 1;
            visibility: visible;
        }

        .new-page h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            transform: translateY(30px);
            opacity: 0;
            transition: all 0.5s ease 0.3s;
            color: #3aff76;
        }

        .new-page.active h1 {
            transform: translateY(0);
            opacity: 1;
        }

        .new-page p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            transform: translateY(30px);
            opacity: 0;
            transition: all 0.5s ease 0.5s;
        }

        .new-page.active p {
            transform: translateY(0);
            opacity: 1;
        }

        .back-btn {
            background: rgba(58, 255, 118, 0.1);
            border: 2px solid rgba(58, 255, 118, 0.3);
            color: #3aff76;
            padding: 0.8rem 2rem;
            border-radius: 30px;
            cursor: pointer;
            transition: all 0.3s ease;
            transform: translateY(30px);
            opacity: 0;
        }

        .new-page.active .back-btn {
            transform: translateY(0);
            opacity: 1;
            transition: all 0.5s ease 0.7s;
        }

        .back-btn:hover {
            background: rgba(58, 255, 118, 0.2);
            transform: translateY(-2px);
        }

        @keyframes slideUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Responsive design */
        @media (max-width: 768px) {
            .logo {
                font-size: 2rem;
            }
            
            .subtitle {
                font-size: 1rem;
            }
            
            .new-page h1 {
                font-size: 2rem;
            }
        }