:root {
            --primary-blue: #0077FF;
            --dark-color: #121212;
            --light-color: #F8F9FA;
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            color: var(--dark-color);
            background: #ffffff;
            line-height: 1.75;
            min-height: 100vh;
        }

        .hero {
            background: linear-gradient(135deg, var(--light-color) 0%, #E0E0E0 100%);
        }

        .card {
            transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
            border: 1px solid rgba(229, 231, 235, 0.6);
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(8px);
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
            border-color: var(--primary-blue);
        }

        .nav-link {
            position: relative;
            transition: color 0.3s ease;
            font-weight: 500;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--primary-blue);
            transition: width 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
        }

        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }

        .gradient-text {
            background: linear-gradient(90deg, #00C6FF, #0077FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .skill-bar {
            transition: width 1.5s ease-in-out;
            background-color: var(--primary-blue);
        }

        .btn-primary {
            background-color: var(--primary-blue);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .btn-primary:hover {
            background-color: #0066E6;
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(0, 119, 255, 0.3);
        }

        #mobile-menu {
            transform: translateX(100%);
            transition: transform 0.4s ease-in-out;
        }

        #mobile-menu.open {
            transform: translateX(0);
        }

        .contact-input:focus {
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(0, 119, 255, 0.25);
        }