/* Unified Token Framework mapping both design structures */
        :root {
            /* Default Light Mode Map Tokens */
            --bg-main: #f8fafc;
            --bg-card: rgba(255, 255, 255, 0.65);
            --accent: #0284c7;
            --accent-hover: #0369a1;
            --text-main: #0f172a;
            --text-muted: #475569;
            --border: rgba(15, 23, 42, 0.06);
            --glass-bg: rgba(255, 255, 255, 0.4);
            --glass-border: rgba(255, 255, 255, 0.5);
            --glow-shadow: rgba(2, 132, 199, 0.1);
            --glow-active: rgba(2, 132, 199, 0.25);
            --gradient-1: rgba(14, 165, 233, 0.08);
            --gradient-2: rgba(2, 132, 199, 0.06);
        }

        [data-theme="dark"] {
            /* Active Dark Mode Overrides */
            --bg-main: #0b0f19;
            --bg-card: rgba(30, 41, 59, 0.7);
            --accent: #38bdf8;
            --accent-hover: #0ea5e9;
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
            --border: rgba(255, 255, 255, 0.08);
            --glass-bg: rgba(255, 255, 255, 0.03);
            --glass-border: rgba(255, 255, 255, 0.08);
            --glow-shadow: rgba(56, 189, 248, 0.1);
            --glow-active: rgba(56, 189, 248, 0.35);
            --gradient-1: rgba(56, 189, 248, 0.04);
            --gradient-2: rgba(14, 165, 233, 0.03);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-main);
            background-image: 
                radial-gradient(circle at 10% 20%, var(--gradient-1) 0%, transparent 50%),
                radial-gradient(circle at 90% 80%, var(--gradient-2) 0%, transparent 50%);
            background-attachment: fixed;
            color: var(--text-main);
            line-height: 1.6;
            padding-bottom: 4rem;
            overflow-x: hidden;
            /* Global layout transition engine tracking theme switches smoothly */
            transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease;
        }

        .container {
            max-width: 1050px;
            margin: 0 auto;
            padding: 0 1.5rem;
            position: relative;
        }

        /* Top-Right Toggle Navigation Controls */
        .theme-nav {
            position: absolute;
            top: 2rem;
            right: 1.5rem;
            z-index: 100;
        }

        .theme-toggle-btn {
            background-color: var(--bg-card);
            border: 1px solid var(--border);
            color: var(--text-main);
            padding: 0.6rem;
            border-radius: 50%;
            cursor: pointer;
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .theme-toggle-btn:hover {
            transform: scale(1.1) rotate(15deg);
            border-color: var(--accent);
            color: var(--accent);
        }

        /* Entry Keyframe Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes pulseGlow {
            0%, 100% { box-shadow: 0 4px 20px 0 var(--glow-shadow); }
            50% { box-shadow: 0 4px 24px 6px var(--glow-active); }
        }

        header {
            padding: 7rem 0 4rem 0;
            border-bottom: 1px solid var(--border);
            animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
            transition: border-color 0.4s ease;
        }

        .profile-title {
            font-size: 2.75rem;
            font-weight: 800;
            letter-spacing: -0.05em;
            margin-bottom: 0.5rem;
        }

        .profile-title span {
            color: var(--accent);
            transition: color 0.4s ease;
        }

        .profile-subtitle {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 600px;
            margin-bottom: 2rem;
            transition: color 0.4s ease;
        }

        .links-container {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        /* Generic Framework Button Rules */
        .btn {
            display: inline-flex;
            align-items: center;
            background-color: var(--bg-card);
            color: var(--text-main);
            padding: 0.75rem 1.5rem;
            border-radius: 0.5rem;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            border: 1px solid var(--border);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .btn:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
            color: var(--accent);
        }

        .btn-primary {
            background-color: var(--accent);
            color: #ffffff !important;
            border: none;
        }

        .btn-primary:hover {
            background-color: var(--accent-hover);
            box-shadow: 0 4px 14px var(--glow-active);
        }

        .btn-glass {
            background-color: var(--glass-bg);
            border: 1px solid var(--glass-border);
            color: var(--text-main);
        }

        .btn-glass:hover {
            background-color: var(--bg-card);
            border-color: var(--accent);
            animation: pulseGlow 2s infinite;
        }

        /* Section Block Allocations */
        section {
            padding: 5rem 0 1rem 0;
            opacity: 0;
            animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
        }

        section h2 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 2rem;
            letter-spacing: -0.03em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        /* Repository Card Layout structures */
        .project-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 1.5rem;
        }

        .project-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 0.75rem;
            padding: 2rem;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            box-shadow: 0 4px 24px -4px rgba(0, 0, 0, 0.02);
            transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.4s ease, border-color 0.4s ease;
        }

        .project-card:hover {
            border-color: var(--accent);
            transform: translateY(-4px) scale(1.01);
            box-shadow: 0 16px 32px -12px rgba(0, 0, 0, 0.15);
        }

        .project-header h3 {
            font-size: 1.3rem;
            margin-bottom: 0.75rem;
            transition: color 0.3s ease;
        }

        .project-card:hover .project-header h3 {
            color: var(--accent);
        }

        .project-desc {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 1.5rem;
            transition: color 0.4s ease;
        }

        .tag-row {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            margin-bottom: 1.5rem;
        }

        .tag {
            background-color: rgba(2, 132, 199, 0.05);
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.60rem;
            border-radius: 0.25rem;
            border: 1px solid rgba(2, 132, 199, 0.08);
            transition: color 0.4s ease, background-color 0.4s ease;
        }

        [data-theme="dark"] .tag {
            background-color: rgba(56, 189, 248, 0.06);
            border-color: rgba(56, 189, 248, 0.1);
        }

        /* Glassmorphism Input Form Configuration */
        .contact-form {
            background-color: var(--bg-card);
            border: 1px solid var(--glass-border);
            box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.04);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: 1rem;
            padding: 2.5rem;
            max-width: 600px;
            transition: background-color 0.4s ease, border-color 0.4s ease;
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-muted);
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        .form-group input, .form-group textarea {
            width: 100%;
            background-color: rgba(255, 255, 255, 0.7);
            border: 1px solid rgba(15, 23, 42, 0.1);
            border-radius: 0.5rem;
            padding: 0.85rem;
            color: var(--text-main);
            font-size: 0.95rem;
            transition: all 0.3s ease;
        }

        [data-theme="dark"] .form-group input, [data-theme="dark"] .form-group textarea {background-color: rgba(15, 23, 42, 0.6);}
        .form-group input:focus, .form-group textarea:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
            background-color: #ffffff;
        }

        /* Mobile Optimization Rules */
        @media (max-width: 640px) {
            header {
                padding: 4rem 0 2.5rem 0;
            }
            .theme-nav { top: 1.5rem; right: 1rem; }
            .profile-title {
                font-size: 2.25rem;
            }
            .project-grid {
                grid-template-columns: 1fr;
            }
            section {
                padding: 3rem 0 1rem 0;
            }
            .contact-form {
                padding: 1.75rem;
            }
        }