:root {
            --primary-color: #0078d7;
            --secondary-color: #2d3748;
            --accent-color: #4fd1c5;
            --light-color: #f7fafc;
            --dark-color: #1a202c;
        }
        
        body {
            font-family: 'Poppins', sans-serif;
            scroll-behavior: smooth;
        }
        
        .navbar {
            background-color: rgba(255, 255, 255, 0.95) !important;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        .navbar-brand {
            font-weight: 700;
            color: var(--primary-color) !important;
        }
        
        .nav-link {
            color: var(--secondary-color) !important;
            font-weight: 500;
            margin: 0 10px;
            position: relative;
        }
        
        .nav-link:hover {
            color: var(--primary-color) !important;
        }
        
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: 0;
            left: 0;
            background-color: var(--primary-color);
            transition: width 0.3s;
        }
        
        .nav-link:hover::after {
            width: 100%;
        }
        
        .hero-section {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            padding: 100px 0;
        }
        
        .hero-title {
            font-weight: 700;
            color: var(--dark-color);
        }
        
        .hero-subtitle {
            color: var(--secondary-color);
            font-weight: 400;
        }
        
        .btn-primary {
            background-color: var(--primary-color);
            border: none;
            padding: 10px 25px;
            font-weight: 500;
        }
        
        .btn-primary:hover {
            background-color: #0061aa;
        }
        
        .btn-outline-primary {
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
            padding: 10px 25px;
            font-weight: 500;
        }
        
        .btn-outline-primary:hover {
            background-color: var(--primary-color);
            color: white;
        }
        
        .section-title {
            position: relative;
            display: inline-block;
            color: var(--dark-color);
            font-weight: 700;
            margin-bottom: 50px;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            width: 50px;
            height: 3px;
            bottom: -10px;
            left: 0;
            background-color: var(--primary-color);
        }
        
        .card {
            border: none;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s, box-shadow 0.3s;
            margin-bottom: 20px;
            height: 100%;
        }
        
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .card-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 15px;
        }
        
        .card-title {
            font-weight: 600;
            color: var(--dark-color);
        }
        
        .timeline {
            position: relative;
            padding-left: 50px;
        }
        
        .timeline::before {
            content: '';
            position: absolute;
            left: 25px;
            top: 0;
            bottom: 0;
            width: 2px;
            background-color: #e2e8f0;
        }
        
        .timeline-item {
            position: relative;
            margin-bottom: 30px;
        }
        
        .timeline-dot {
            position: absolute;
            left: -33px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background-color: var(--primary-color);
            border: 4px solid white;
            box-shadow: 0 0 0 2px var(--primary-color);
        }
        
        .timeline-date {
            color: var(--secondary-color);
            font-size: 0.9rem;
            margin-bottom: 5px;
        }
        
        .timeline-title {
            font-weight: 600;
            color: var(--dark-color);
            margin-bottom: 5px;
        }
        
        .progress {
            height: 8px;
            background-color: #e2e8f0;
        }
        
        .progress-bar {
            background-color: var(--primary-color);
        }
        
        .skill-name {
            font-weight: 500;
            margin-bottom: 5px;
            color: var(--secondary-color);
        }
        
        .portfolio-item {
            position: relative;
            overflow: hidden;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            margin-bottom: 30px;
        }
        
        .portfolio-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 120, 215, 0.9);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            opacity: 0;
            transition: opacity 0.3s;
        }
        
        .portfolio-item:hover .portfolio-overlay {
            opacity: 1;
        }
        
        .contact-card {
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            padding: 30px;
            height: 100%;
        }
        
        .contact-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 30px 0;
        }
        
        .social-icon {
            display: inline-flex;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            margin: 0 10px;
            transition: background-color 0.3s;
        }
        
        .social-icon:hover {
            background-color: var(--primary-color);
        }
        
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 1.2rem;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 999;
        }
        
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }