:root {
            --primary-color: #667eea;
            --secondary-color: #764ba2;
            --accent-color: #f093fb;
            --dark-color: #2c3e50;
            --light-color: #ecf0f1;
            --text-color: #34495e;
            --gradient: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            --gradient-accent: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
        }

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

        body {
            font-family: 'Poppins', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            overflow-x: hidden;
        }

        /* Smooth scrolling */
        html {
            scroll-behavior: smooth;
        }

        /* Navigation */
        .navbar {
            background: rgba(255, 255, 255, 0.95) !important;
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-link {
            font-weight: 500;
            margin: 0 10px;
            position: relative;
            transition: all 0.3s ease;
        }

        .nav-link:hover {
            color: var(--primary-color) !important;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -5px;
            left: 50%;
            background: var(--gradient);
            transition: all 0.3s ease;
            transform: translateX(-50%);
        }

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

        .btn-hire {
            background: var(--gradient);
            border: none;
            color: white;
            padding: 10px 25px;
            border-radius: 25px;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
        }

        .btn-hire:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
            color: white;
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            background: var(--gradient);
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.05)" points="0,1000 1000,200 1000,1000"/></svg>');
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .profile-img {
            width: 300px;
            height: 300px;
            border-radius: 50%;
            border: 8px solid rgba(255, 255, 255, 0.2);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            transition: all 0.3s ease;
            background: linear-gradient(45deg, #667eea, #764ba2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 4rem;
            color: white;
        }

        .profile-img:hover {
            transform: scale(1.05);
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
        }

        .hero-title {
            font-size: 4rem;
            font-weight: 900;
            color: white;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
            margin-bottom: 20px;
        }

        .hero-subtitle {
            font-size: 1.5rem;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 30px;
        }

        .typed-text {
            font-size: 2rem;
            font-weight: 600;
            color: var(--accent-color);
            text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
        }

        /* Section Titles */
        .section-title {
            text-align: center;
            margin-bottom: 80px;
            position: relative;
        }

        .section-title h2 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--dark-color);
            position: relative;
            display: inline-block;
        }

        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: var(--gradient);
            border-radius: 2px;
        }

        /* About Section */
        .about-section {
            padding: 100px 0;
            background: var(--light-color);
        }

        .about-img {
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
        }

        .about-img:hover {
            transform: translateY(-10px);
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
        }

        .info-item {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            padding: 10px;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }

        .info-item:hover {
            transform: translateX(10px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }

        .info-item strong {
            color: var(--primary-color);
            min-width: 100px;
        }

        /* Skills Section */
        .skills-section {
            padding: 100px 0;
        }

        .skill-item {
            background: white;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            margin-bottom: 30px;
            transition: all 0.3s ease;
        }

        .skill-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }

        .skill-name {
            font-weight: 600;
            color: var(--dark-color);
            margin-bottom: 15px;
        }

        .progress {
            height: 10px;
            border-radius: 5px;
            background: #f0f0f0;
            overflow: hidden;
        }

        .progress-bar {
            background: var(--gradient);
            transition: width 1.5s ease;
            border-radius: 5px;
        }

        /* Services Section */
        .services-section {
            padding: 100px 0;
            background: var(--light-color);
        }

        .service-card {
            background: white;
            border-radius: 20px;
            padding: 40px 30px;
            text-align: center;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            height: 100%;
        }

        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
        }

        .service-icon {
            width: 80px;
            height: 80px;
            background: var(--gradient);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            font-size: 2rem;
            color: white;
        }

        .service-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--dark-color);
            margin-bottom: 15px;
        }

        /* Portfolio Section */
        .portfolio-section {
            padding: 100px 0;
        }

        .portfolio-filter {
            text-align: center;
            margin-bottom: 50px;
        }

        .filter-btn {
            background: transparent;
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
            padding: 10px 25px;
            margin: 5px;
            border-radius: 25px;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .filter-btn:hover,
        .filter-btn.active {
            background: var(--gradient);
            color: white;
            border-color: transparent;
        }

        .portfolio-item {
            position: relative;
            overflow: hidden;
            border-radius: 15px;
            margin-bottom: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
        }

        .portfolio-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }

        .portfolio-img {
            width: 100%;
            height: 250px;
            object-fit: cover;
            background: var(--gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 3rem;
        }

        .portfolio-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(102, 126, 234, 0.9);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: all 0.3s ease;
        }

        .portfolio-item:hover .portfolio-overlay {
            opacity: 1;
        }

        .portfolio-overlay i {
            color: white;
            font-size: 2rem;
        }

        /* Contact Section */
        .contact-section {
            padding: 100px 0;
            background: var(--light-color);
        }

        .contact-form {
            background: white;
            padding: 50px;
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }

        .form-control {
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            padding: 15px 20px;
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
        }

        .btn-submit {
            background: var(--gradient);
            border: none;
            color: white;
            padding: 15px 40px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 1.1rem;
            transition: all 0.3s ease;
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
        }

        .btn-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 35px rgba(102, 126, 234, 0.4);
            color: white;
        }

        /* Footer */
        .footer {
            background: var(--dark-color);
            color: white;
            padding: 50px 0 30px;
            text-align: center;
        }

        .social-links a {
            display: inline-block;
            width: 50px;
            height: 50px;
            background: var(--gradient);
            border-radius: 50%;
            line-height: 50px;
            margin: 0 10px;
            color: white;
            font-size: 1.2rem;
            transition: all 0.3s ease;
        }

        .social-links a:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
            color: white;
        }

        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .fade-in-up {
            animation: fadeInUp 0.8s ease;
        }

        .fade-in-section {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
            will-change: opacity, transform;
        }

        .fade-in-section.visible {
            opacity: 1;
            transform: none;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            
            .typed-text {
                font-size: 1.5rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
            
            .profile-img {
                width: 200px;
                height: 200px;
                font-size: 2.5rem;
            }
            
            .contact-form {
                padding: 30px;
            }
        }

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 25px;
    right: 25px;
    background: var(--gradient);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
}

/* Custom styles for contact form input pop-up feature */
.hidden-input {
    display: none;
    opacity: 0;
    transform: translateY(-20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.pop-up {
    display: block !important;
    opacity: 1 !important;
    transform: translateY(0) !important;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

/* Fade-in animation for sequential pop-up */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s forwards;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.4);
    color: white;
}