:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #f59e0b;
    --dark: #1e293b;
    --light: #f8fafc;
    --gray: #94a3b8;
    --success: #10b981;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 15px;
}

.section-title span {
    color: var(--primary);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary);
    border-radius: 2px;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
    padding: 20px 0;
}

header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    padding: 15px 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.logo span {
    color: var(--secondary);
}

.nav-menu {
    display: flex;
    list-style: none;
}

.nav-item {
    margin-left: 30px;
}

.nav-link {
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: color 0.3s ease;
    position: relative;
}

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

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

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

.hamburger {
    display: none;
    cursor: pointer;
}

.hamburger div {
    width: 25px;
    height: 3px;
    background: var(--dark);
    margin: 5px;
    transition: all 0.3s ease;
}

/* Hero Section */
#hero {
    height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(245, 158, 11, 0.1) 100%);
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.hero-text {
    flex: 1;
    min-width: 300px;
    padding-right: 30px;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-text h1 span {
    color: var(--primary);
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 30px;
    max-width: 500px;
}

.hero-btns {
    display: flex;
    gap: 20px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: 2px solid var(--primary);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
}

.hero-image {
    flex: 1;
    min-width: 300px;
    text-align: center;
    position: relative;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

.social-icons {
    position: absolute;
    bottom: 50px;
    left: 0;
    display: flex;
    gap: 15px;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.social-icon:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-5px);
}

/* About Section */
#about {
    background: white;
}

.about-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
}

.about-image {
    flex: 1;
    min-width: 300px;
    text-align: center;
}

.about-image img {
    max-width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-text h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--dark);
}

.about-text p {
    color: var(--gray);
    margin-bottom: 20px;
}

.skills {
    margin-top: 30px;
}

.skill-item {
    margin-bottom: 20px;
}

.skill-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.skill-name {
    font-weight: 600;
}

.skill-percent {
    color: var(--primary);
}

.skill-bar {
    height: 10px;
    background: #e2e8f0;
    border-radius: 5px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--primary);
    border-radius: 5px;
    transition: width 1.5s ease;
}

/* Resume Section */
#resume {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.03) 0%, rgba(245, 158, 11, 0.03) 100%);
}

.resume-container {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
}

.resume-column {
    flex: 1;
    min-width: 300px;
}

.resume-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--dark);
    position: relative;
    padding-left: 30px;
}

.resume-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 20px;
    height: 20px;
    background: var(--primary);
    border-radius: 50%;
}

.resume-title::after {
    content: '';
    position: absolute;
    left: 9px;
    top: 28px;
    width: 2px;
    height: calc(100% - 20px);
    background: var(--primary);
}

.resume-item {
    padding: 0 0 30px 30px;
    position: relative;
}

.resume-item:last-child {
    padding-bottom: 0;
}

.resume-item::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    width: 2px;
    height: 100%;
    background: #cbd5e1;
}

.resume-item-header {
    position: relative;
    padding: 10px 20px;
    background: white;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
}

.resume-item-header::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 15px;
    width: 0;
    height: 0;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-right: 10px solid white;
}

.resume-item-year {
    font-size: 0.9rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 5px;
}

.resume-item-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 5px;
    color: var(--dark);
}

.resume-item-company {
    font-size: 1rem;
    color: var(--gray);
    margin-bottom: 10px;
}

.resume-item-description {
    color: var(--gray);
}

/* Portfolio Section */
#portfolio {
    background: white;
}

.portfolio-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 8px 20px;
    background: transparent;
    border: 1px solid var(--gray);
    border-radius: 30px;
    color: var(--dark);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.portfolio-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.portfolio-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(37, 99, 235, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: all 0.3s ease;
}

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

.portfolio-title {
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.portfolio-category {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.portfolio-item:hover .portfolio-title,
.portfolio-item:hover .portfolio-category {
    transform: translateY(0);
}

.portfolio-link {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.portfolio-item:hover .portfolio-link {
    opacity: 1;
    transform: translateY(0);
}

/* Services Section */
#services {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.03) 0%, rgba(245, 158, 11, 0.03) 100%);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.service-card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 70px;
    height: 70px;
    background: rgba(37, 99, 235, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--primary);
    font-size: 1.8rem;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--dark);
}

.service-description {
    color: var(--gray);
    margin-bottom: 20px;
}

/* Rate Card Section */
#rates {
    background: white;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.pricing-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.pricing-header {
    padding: 30px;
    text-align: center;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(245, 158, 11, 0.1) 100%);
}

.pricing-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--dark);
}

.pricing-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 5px;
}

.pricing-price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--gray);
}

.pricing-duration {
    color: var(--gray);
}

.pricing-features {
    padding: 30px;
}

.pricing-feature {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    color: var(--gray);
}

.pricing-feature i {
    color: var(--success);
    margin-right: 10px;
}

.pricing-footer {
    padding: 0 30px 30px;
    text-align: center;
}

.pricing-recommended {
    position: absolute;
    top: 20px;
    right: -40px;
    background: var(--secondary);
    color: white;
    padding: 5px 40px;
    transform: rotate(45deg);
    font-size: 0.8rem;
    font-weight: 600;
}

/* Contact Section */
#contact {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(245, 158, 11, 0.1) 100%);
}

.contact-container {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.contact-info h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--dark);
}

.contact-info p {
    color: var(--gray);
    margin-bottom: 30px;
}

.contact-details {
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
}

.contact-icon {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    flex-shrink: 0;
}

.contact-text h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--dark);
}

.contact-text p {
    margin: 0;
    color: var(--gray);
}

.contact-social {
    display: flex;
    gap: 15px;
}

.contact-social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.contact-social a:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-5px);
}

.contact-form {
    flex: 1;
    min-width: 300px;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.form-group {
    margin-bottom: 20px;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #e2e8f0;
    border-radius: 5px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

.submit-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.submit-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
}

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

.footer-content p {
    color: var(--gray);
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
}

.footer-link {
    color: var(--gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: var(--primary);
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background: var(--primary);
    transform: translateY(-5px);
}

.copyright {
    color: var(--gray);
    font-size: 0.9rem;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.show {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 992px) {
    .section-title h2 {
        font-size: 2rem;
    }
    
    .hero-text h1 {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }
    
    .hamburger {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: white;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: all 0.5s ease;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-item {
        margin: 15px 0;
    }
    
    .hero-text {
        padding-right: 0;
        margin-bottom: 40px;
        text-align: center;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .social-icons {
        position: static;
        margin-top: 30px;
        justify-content: center;
    }
    
    .hamburger.active div:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }
    
    .hamburger.active div:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active div:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }
}

@media (max-width: 576px) {
    .section-title h2 {
        font-size: 1.8rem;
    }
    
    .hero-text h1 {
        font-size: 2.2rem;
    }
    
    .btn {
        padding: 10px 20px;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}