:root {
            /* LIGHT THEME (Monochrome) */
            --bg-main: #FFFFFF;
            --bg-secondary: #F4F4F5;
            /* Zinc 100 */
            --text-primary: #09090B;
            /* Zinc 950 (Almost Black) */
            --text-secondary: #52525B;
            /* Zinc 600 */
            --border-color: #E4E4E7;
            /* Zinc 200 */
            --card-bg: rgba(255, 255, 255, 0.85);
            --card-border: rgba(228, 228, 231, 0.6);

            /* Accent is now BLACK in light mode */
            --accent-primary: #000000;
            --accent-inverse: #FFFFFF;
            --accent-gradient: linear-gradient(135deg, #000000 0%, #3F3F46 100%);

            --glow-color: rgba(0, 0, 0, 0.08);
            --success-color: #10B981;
        }

        /* DARK THEME (Monochrome) */
        .dark {
            --bg-main: #000000;
            /* Pure Black */
            --bg-secondary: #09090B;
            /* Zinc 950 */
            --text-primary: #FAFAFA;
            /* Zinc 50 */
            --text-secondary: #A1A1AA;
            /* Zinc 400 */
            --border-color: #27272A;
            /* Zinc 800 */
            --card-bg: rgba(9, 9, 11, 0.6);
            /* Zinc 950 Glass */
            --card-border: rgba(255, 255, 255, 0.15);

            --accent-primary: #FFFFFF;
            --accent-inverse: #000000;
            --accent-gradient: linear-gradient(135deg, #FFFFFF 0%, #A1A1AA 100%);

            --glow-color: rgba(255, 255, 255, 0.1);
        }

        body {
            font-family: 'Plus Jakarta Sans', sans-serif;
            background-color: var(--bg-main);
            color: var(--text-primary);
            transition: background-color 0.5s ease, color 0.5s ease;
            overflow-x: hidden;
        }

        .font-mono {
            font-family: 'JetBrains Mono', monospace;
        }

        /* Custom Scrollbar */
        ::-webkit-scrollbar {
            width: 6px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg-main);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--text-secondary);
            border-radius: 10px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-primary);
        }

        /* Premium Glass Card */
        .premium-card {
            background: var(--card-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--card-border);
            border-radius: 1.5rem;
            /* 24px */
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            position: relative;
            overflow: hidden;
        }

        /* Subtle Inner Glow on Hover */
        .premium-card::after {
            content: "";
            position: absolute;
            inset: 0;
            border-radius: 1.5rem;
            padding: 1px;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }

        .premium-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px -15px var(--glow-color);
            border-color: var(--accent-primary);
        }

        /* Gradient Text */
        .text-gradient {
            background: var(--accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* Animated Background Mesh (Grayscale) */
        .mesh-bg {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            z-index: -1;
            overflow: hidden;
            pointer-events: none;
        }

        .mesh-blob {
            position: absolute;
            border-radius: 50%;
            filter: blur(80px);
            opacity: 0.08;
            background-color: var(--text-primary);
            animation: float 20s infinite alternate;
        }

        @keyframes float {
            0% {
                transform: translate(0, 0) scale(1);
            }

            100% {
                transform: translate(10%, 10%) scale(1.1);
            }
        }

        /* Modal Backdrop */
        .modal-backdrop {
            background-color: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(8px);
        }

        .fade-in-up {
            animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
            opacity: 0;
            transform: translateY(30px);
        }

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

        /* Utility for Inverted Text */
        .text-inverse {
            color: var(--accent-inverse);
        }

        .bg-accent {
            background-color: var(--accent-primary);
        }

        .border-accent {
            border-color: var(--accent-primary);
        }

        /* Input Styles */
        .input-premium {
            background: transparent;
            border-bottom: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .input-premium:focus {
            border-bottom-color: var(--accent-primary);
            padding-left: 10px;
        }

        /* Loading Spinner */
        .spinner {
            border: 3px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top: 3px solid #fff;
            width: 20px;
            height: 20px;
            -webkit-animation: spin 1s linear infinite;
            /* Safari */
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% {
                transform: rotate(0deg);
            }

            100% {
                transform: rotate(360deg);
            }
        }