/* ===================================
   Portfolio Website Stylesheet
   Professional Color Scheme - Elegant Blue/Gray
   =================================== */

/* CSS Variables */
:root {
    /* Primary Colors - Elegant Blue */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #60a5fa;
    --secondary-color: #64748b;
    --accent-color: #0f172a;
    
    /* Neutral Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-dark: #0f172a;
    --border-color: #e2e8f0;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    
    /* Spacing */
    --section-padding: 100px;
    --container-width: 1200px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Section Styles */
.section-padding {
    padding: var(--section-padding) 0;
}

.bg-light {
    background-color: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 8px 16px;
    background: var(--gradient-primary);
    color: var(--bg-white);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-radius: 50px;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-line {
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 0 auto;
    border-radius: 2px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    padding: 20px 0;
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    padding: 15px 0;
}

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

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--bg-white);
    transition: var(--transition-base);
}

.navbar.scrolled .nav-logo {
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    padding: 5px 0;
}

.navbar.scrolled .nav-link {
    color: var(--text-primary);
}

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

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

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.hamburger {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--bg-white);
    position: relative;
    transition: var(--transition-base);
}

.navbar.scrolled .hamburger,
.navbar.scrolled .hamburger::before,
.navbar.scrolled .hamburger::after {
    background: var(--text-primary);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--bg-white);
    transition: var(--transition-base);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle.active .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    background: var(--gradient-hero);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.4;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    color: var(--bg-white);
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--primary-light);
    margin-bottom: 10px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 4.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
}

.typing-text {
    color: var(--primary-light);
}

.cursor {
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-description {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 500px;
    margin-bottom: 32px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

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

.hero-social a {
    width: 45px;
    height: 45px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: var(--transition-base);
}

.hero-social a:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

/* Hero Image */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-wrapper {
    position: relative;
}

.hero-shape {
    position: absolute;
    width: 400px;
    height: 400px;
    background: var(--gradient-primary);
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    opacity: 0.1;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: morph 8s ease-in-out infinite;
}

@keyframes morph {
    0%, 100% {
        border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    }
    50% {
        border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%;
    }
}

.profile-img {
    width: 350px;
    height: 350px;
    object-fit: cover;
    border-radius: 20px;
    position: relative;
    z-index: 1;
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, #334155 0%, #1e293b 100%);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 1.5rem;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    text-align: center;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-base);
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--bg-white);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--bg-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: var(--bg-white);
    color: var(--primary-color);
    border-color: var(--bg-white);
}

.btn-full {
    width: 100%;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
    min-height: 400px;
}

.about-experience {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--gradient-primary);
    color: var(--bg-white);
    padding: 25px 35px;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.exp-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.exp-text {
    font-size: 0.85rem;
    opacity: 0.9;
}

.about-text h3 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 30px 0;
    padding: 25px;
    background: var(--bg-light);
    border-radius: 15px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Skills Section */
.skills-content {
    max-width: 1000px;
    margin: 0 auto;
}

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

.skills-text h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.skills-text p {
    color: var(--text-secondary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.skill-card {
    background: var(--bg-white);
    padding: 35px;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.skill-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--bg-white);
    margin-bottom: 20px;
}

.skill-card h4 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tags span {
    padding: 6px 12px;
    background: var(--bg-light);
    color: var(--text-secondary);
    font-size: 0.8rem;
    border-radius: 20px;
}

.skill-bars {
    display: grid;
    gap: 25px;
}

.skill-bar {
    background: var(--bg-white);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
}

.skill-info span:first-child {
    font-weight: 600;
    color: var(--text-primary);
}

.skill-info span:last-child {
    color: var(--primary-color);
    font-weight: 600;
}

.progress-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    width: 0;
    transition: width 1.5s ease;
}

/* Projects Section */
.projects-filter {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    background: var(--bg-light);
    border: none;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-base);
}

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

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

.project-card {
    background: var(--bg-white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    position: relative;
    overflow: hidden;
    height: 220px;
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(37, 99, 235, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    opacity: 0;
    transition: var(--transition-base);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-overlay a {
    width: 50px;
    height: 50px;
    background: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.1rem;
    transform: translateY(20px);
    transition: var(--transition-base);
}

.project-card:hover .project-overlay a {
    transform: translateY(0);
}

.project-overlay a:hover {
    background: var(--text-primary);
    color: var(--bg-white);
}

.project-info {
    padding: 25px;
}

.project-info h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.project-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 15px;
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-tags span {
    padding: 5px 12px;
    background: var(--bg-light);
    color: var(--primary-color);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 20px;
}

/* Credentials Section */
.credentials-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.credentials-column h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.credentials-column h3 i {
    color: var(--primary-color);
}

.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-bottom: 30px;
}

.timeline-marker {
    position: absolute;
    left: -34px;
    top: 5px;
    width: 10px;
    height: 10px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 2px solid var(--bg-white);
    box-shadow: 0 0 0 2px var(--primary-color);
}

.timeline-content {
    background: var(--bg-white);
    padding: 20px 25px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.timeline-date {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-light);
    color: var(--primary-color);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 10px;
}

.timeline-content h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.timeline-place {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.certifications h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.certifications h3 i {
    color: var(--primary-color);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.cert-item {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--bg-white);
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.cert-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.cert-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.cert-item span {
    font-weight: 500;
    color: var(--text-primary);
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.contact-info h3 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.8;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--bg-white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.contact-item div span {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.contact-item div a,
.contact-item div p {
    color: var(--text-primary);
    font-weight: 600;
}

.contact-item div a:hover {
    color: var(--primary-color);
}

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

.contact-social a {
    width: 45px;
    height: 45px;
    background: var(--bg-light);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: var(--transition-base);
}

.contact-social a:hover {
    background: var(--gradient-primary);
    color: var(--bg-white);
    transform: translateY(-3px);
}

.contact-form-wrapper {
    background: var(--bg-white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.contact-form {
    display: grid;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition-base);
    background: var(--bg-light);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-white);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: var(--bg-white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--bg-white);
    display: inline-block;
    margin-bottom: 15px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    max-width: 300px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition-base);
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

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

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    transition: var(--transition-base);
}

.footer-social a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.footer-bottom i {
    color: #ef4444;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 2;
    }
    
    .hero-image {
        order: 1;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-social {
        justify-content: center;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .credentials-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand p {
        max-width: 100%;
    }
    
    .footer-links {
        align-items: center;
    }
    
    .footer-social {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 70px;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background: var(--bg-white);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 30px;
        transition: var(--transition-slow);
        box-shadow: var(--shadow-xl);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        color: var(--text-primary);
        font-size: 1.1rem;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .profile-img {
        width: 250px;
        height: 250px;
    }
    
    .hero-shape {
        width: 300px;
        height: 300px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        padding: 25px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .about-experience {
        position: relative;
        right: 0;
        bottom: 0;
        margin-top: 20px;
    }
    
    .cert-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-filter {
        gap: 10px;
    }
    
    .filter-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* Hidden class for filtering */
.project-card.hidden {
    display: none;
}