/* Modern CSS Custom Properties */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --danger-color: #ef4444;
    
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-dark: #111827;
    
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --radius-sm: 0.25rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* OPTIMIZED TRANSITIONS */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    /* PERFORMANCE OPTIMIZATION */
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

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

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

/* Loading Screen - OPTIMIZED */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    contain: layout style paint;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                visibility 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    text-align: center;
    color: white;
}

.loader-dots {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 1rem;
}

.loader-dots div {
    width: 12px;
    height: 12px;
    background: white;
    border-radius: 50%;
    animation: bounce 1.4s ease-in-out both infinite;
}

.loader-dots div:nth-child(1) { animation-delay: -0.32s; }
.loader-dots div:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* Navigation - OPTIMIZED */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    will-change: transform;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(-100%);
}

.navbar.visible {
    transform: translateY(0);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    will-change: width;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Hero Section - OPTIMIZED */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    will-change: transform;
    transform: translate3d(0, 0, 0); /* Force GPU layer */
}

.hero-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
    animation-delay: var(--delay);
    left: var(--x);
    top: var(--y);
}

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

.hero-content {
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 0 1rem;
}

.profile-card {
    margin-bottom: 3rem;
}

.profile-image-container {
    position: relative;
    display: inline-block;
    margin-bottom: 1.5rem;
}

.profile-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 4px solid rgba(255, 255, 255, 0.2);
    object-fit: cover;
    transition: var(--transition);
}

.profile-img:hover {
    transform: scale(1.05);
}

.status-indicator {
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: 20px;
    height: 20px;
    background: var(--secondary-color);
    border-radius: 50%;
    border: 3px solid white;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-name {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.1;
}

.name-highlight {
    background: linear-gradient(45deg, #f093fb 0%, #f5576c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    margin-bottom: 1rem;
    min-height: 2rem;
}

.typing-text {
    font-family: var(--font-mono);
}

.cursor {
    animation: blink 1s infinite;
}

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

.hero-location {
    font-size: 1rem;
    opacity: 0.9;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 3rem 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
}

/* Buttons - OPTIMIZED */
.btn {
    padding: 1rem 2rem;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    will-change: transform;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    background: #d97706;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(245, 158, 11, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    opacity: 0.8;
}

.scroll-mouse {
    width: 24px;
    height: 40px;
    border: 2px solid white;
    border-radius: 12px;
    margin: 0 auto 0.5rem;
    position: relative;
}

.scroll-wheel {
    width: 3px;
    height: 6px;
    background: white;
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 0; top: 8px; }
    50% { opacity: 1; }
    100% { opacity: 0; top: 24px; }
}

/* Contact Popup - OPTIMIZED */
.contact-popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    contain: layout style paint;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-popup.visible {
    opacity: 1;
    visibility: visible;
}

.popup-content {
    background: white;
    border-radius: var(--radius-xl);
    padding: 2rem;
    max-width: 400px;
    width: 90%;
    position: relative;
    transform: scale(0.8);
    transition: var(--transition);
}

.contact-popup.visible .popup-content {
    transform: scale(1);
}

.popup-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.popup-header h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
}

.popup-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
}

.popup-close:hover {
    color: var(--text-primary);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.social-link:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.social-link.linkedin:hover { border-color: #0a66c2; color: #0a66c2; }
.social-link.github:hover { border-color: #171515; color: #171515; }
.social-link.instagram:hover { border-color: #e4405f; color: #e4405f; }

/* Sections */
.section {
    padding: 6rem 0;
    position: relative;
}

.section-alt {
    background: var(--bg-secondary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about-content {
    display: grid;
    gap: 3rem;
    align-items: center;
}

.about-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.about-details {
    display: grid;
    gap: 1rem;
    margin-bottom: 2rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.detail-item i {
    width: 20px;
    color: var(--primary-color);
}

.about-description {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

.about-highlights {
    display: grid;
    gap: 1.5rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
}

.highlight-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.highlight-text h4 {
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.highlight-text p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Skills Section - OPTIMIZED */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    border: 1px solid var(--border-color);
    will-change: transform;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.skill-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    margin: 0 auto 1.5rem;
}

.skill-category h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.skill-tag {
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.skill-tag:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-1px);
}

/* OPTIMIZED SKILL TAG ANIMATIONS */
.skill-tag-hidden {
    transform: translateY(20px);
    opacity: 0;
    will-change: transform, opacity;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-tag.visible {
    transform: translateY(0);
    opacity: 1;
}

/* Timeline */
.timeline {
    position: relative;
}

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

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    margin-left: 4rem;
}

.timeline-marker {
    position: absolute;
    left: -3rem;
    top: 0.5rem;
    width: 2.5rem;
    height: 2.5rem;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
    box-shadow: 0 0 0 4px white, 0 0 0 6px var(--border-color);
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.timeline-header {
    margin-bottom: 1.5rem;
}

.timeline-header h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.company {
    color: var(--primary-color);
    font-weight: 600;
    margin-right: 1rem;
}

.period {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.timeline-achievements {
    list-style: none;
    padding-left: 1rem;
}

.timeline-achievements li {
    position: relative;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.timeline-achievements li::before {
    content: '▸';
    position: absolute;
    left: -1rem;
    color: var(--primary-color);
}

/* Projects Section - FIXED IMAGE SIZING */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    will-change: transform;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    height: 250px; /* Fixed height for consistency */
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    position: relative;
    overflow: hidden;
}

/* FIX: Proper image sizing to prevent excessive zooming */
.project-image img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* Changed from cover to contain */
    object-position: center;
    background-color: rgba(255, 255, 255, 0.1); /* Subtle background for empty space */
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Optional: Subtle hover zoom effect */
.project-card:hover .project-image img {
    transform: scale(1.05); /* Gentle zoom instead of excessive */
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

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

.project-links {
    display: flex;
    gap: 1rem;
}

.project-link {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    will-change: transform;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-link:hover {
    background: white;
    color: var(--primary-color);
    transform: scale(1.1);
}

.project-content {
    padding: 2rem;
}

.project-content h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    padding: 0.25rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    font-size: 0.75rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}


/* Certifications Section - OPTIMIZED */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.cert-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    will-change: transform;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.cert-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.cert-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.cert-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Gallery Section - OPTIMIZED */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.gallery-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    will-change: transform;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    opacity: 0;
    transition: var(--transition);
}

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

.gallery-item:hover img {
    transform: scale(1.1);
}

/* OPTIMIZED LIGHTBOX */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    will-change: opacity;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.lightbox-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.lightbox-image {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: 8px;
    transform: scale(0.8);
    will-change: transform;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.lightbox-overlay.visible .lightbox-image {
    transform: scale(1);
}

/* Contact Section */
.contact-content {
    display: grid;
    gap: 3rem;
    align-items: start;
}

.contact-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.contact-details h4 {
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.contact-details a,
.contact-details p {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.contact-social {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-icon {
    width: 50px;
    height: 50px;
    background: var(--bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    border: 1px solid var(--border-color);
    will-change: transform;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.social-icon:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer-content p {
    margin-bottom: 0.5rem;
}

.visitor-message {
    color: var(--secondary-color);
}

/* PERFORMANCE OPTIMIZATIONS */
.animation-complete {
    will-change: auto;
}

/* Responsive Design - OPTIMIZED */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 2rem 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .skills-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .about-highlights {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 1rem;
    }
    
    .timeline-item {
        margin-left: 2.5rem;
    }
    
    .timeline-marker {
        left: -1.25rem;
        width: 2rem;
        height: 2rem;
        font-size: 0.875rem;
    }
    
    /* MOBILE PERFORMANCE OPTIMIZATIONS */
    .project-card:hover,
    .skill-category:hover,
    .cert-card:hover {
        transform: translateY(-2px); /* Reduced movement */
    }
    
    /* Disable expensive animations on mobile */
    .hero-particle,
    .gallery-item:hover img {
        animation: none;
        transform: none;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 4rem 0;
    }
    
    .hero-stats {
        gap: 1.5rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .popup-content {
        margin: 1rem;
        padding: 1.5rem;
    }
    
    .contact-item {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
}

/* ACCESSIBILITY - PREFERS REDUCED MOTION */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .scroll-wheel,
    .loader-dots div,
    .hero-particle {
        animation: none;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }

/* Print Styles */
@media print {
    .navbar,
    .loading-screen,
    .contact-popup,
    .scroll-indicator {
        display: none !important;
    }
    
    .section {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}