/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 8px 16px;
    text-decoration: none;
    z-index: 10000;
    font-weight: 600;
    border-radius: 0 0 4px 0;
}

.skip-link:focus {
    top: 0;
}

/* Screen reader only text */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus indicators */
*:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 2px;
    border-radius: 4px;
}

button:focus-visible,
a:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .reduce-motion *,
    html.reduce-motion * {
        animation: none !important;
        transition: none !important;
        transform: none !important;
    }
}

/* Performance optimizations */
.tech-card,
.project-card,
.cert-card,
.education-card,
.case-study-card,
.blog-card {
    will-change: transform, opacity;
    transform: translateZ(0); /* GPU acceleration */
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Smooth scrolling with performance */
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --text-primary: #000000;
        --text-secondary: #333333;
        --bg-primary: #ffffff;
        --bg-secondary: #f0f0f0;
    }
    
    [data-theme="dark"] {
        --text-primary: #ffffff;
        --text-secondary: #cccccc;
        --bg-primary: #000000;
        --bg-secondary: #1a1a1a;
    }
}

/* ============================================
   LOADING SCREEN
   ============================================ */

.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a237e 0%, #283593 50%, #5ac8fa 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

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

.loader-logo {
    margin-bottom: 30px;
}

.loader-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto;
    animation: pulse 2s ease-in-out infinite;
}

.loader-icon i {
    font-size: 60px;
    color: white;
    animation: rotate 3s linear infinite;
}

.loader-text {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 40px;
    letter-spacing: 2px;
    animation: fadeInOut 2s ease-in-out infinite;
}

.loader-progress {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
    overflow: hidden;
    margin: 0 auto;
}

.loader-progress-bar {
    height: 100%;
    background: white;
    border-radius: 2px;
    width: 0%;
    transition: width 0.3s ease;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes fadeInOut {
    0%, 100% {
        opacity: 0.7;
    }
    50% {
        opacity: 1;
    }
}

/* ============================================
   PARTICLE CANVAS
   ============================================ */

.particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.3;
}

:root {
    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --accent-blue: #5ac8fa;
    --accent-blue-light: #a8e4ff;
    --accent-blue-dark: #0071e3;
    --gradient-start: #e3f2fd;
    --gradient-end: #bbdefb;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] {
    --bg-primary: #1d1d1f;
    --bg-secondary: #2d2d2f;
    --text-primary: #f5f5f7;
    --text-secondary: #a1a1a6;
    --accent-blue: #5ac8fa;
    --accent-blue-light: #0071e3;
    --accent-blue-dark: #0051d5;
    --gradient-start: #1a237e;
    --gradient-end: #283593;
    --glass-bg: rgba(45, 45, 47, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.6);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
    opacity: 0;
    animation: fadeInBody 0.5s ease 1.5s forwards;
}

@keyframes fadeInBody {
    to {
        opacity: 1;
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ============================================
   SCROLL PROGRESS INDICATOR
   ============================================ */

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-blue-dark));
    z-index: 10000;
    transition: width 0.1s ease-out;
    box-shadow: 0 0 10px var(--accent-blue);
}

/* ============================================
   STICKY NAVIGATION MENU
   ============================================ */

.sticky-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 9999;
    padding: 0;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.sticky-nav.visible {
    transform: translateY(0);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform 0.3s ease;
}

.nav-logo:hover {
    transform: scale(1.1);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-blue-dark));
    transition: width 0.3s ease;
}

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

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

.nav-link.active {
    color: var(--accent-blue);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 10001;
    position: relative;
    width: 30px;
    height: 30px;
    justify-content: center;
    align-items: center;
}

.nav-toggle-icon {
    position: relative;
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.nav-toggle-icon::before {
    top: -8px;
    left: 0;
}

.nav-toggle-icon::after {
    bottom: -8px;
    left: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
    transform: rotate(45deg);
    top: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
    transform: rotate(-45deg);
    bottom: 0;
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
        position: relative;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 40px 20px;
        gap: 20px;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--glass-border);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-container {
        padding: 0 24px;
    }
}

/* ============================================
   THEME TOGGLE
   ============================================ */

.theme-toggle {
    position: fixed;
    top: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.theme-toggle {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 8px 25px rgba(90, 200, 250, 0.3), var(--shadow-lg);
}

.theme-toggle:active {
    transform: scale(0.95) rotate(15deg);
}

/* ============================================
   BACK TO TOP BUTTON
   ============================================ */

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--text-primary);
    color: var(--bg-primary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
    font-size: 18px;
}

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

.back-to-top {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 8px 30px rgba(90, 200, 250, 0.4), var(--shadow-xl);
    background: var(--accent-blue);
    color: white;
}

.back-to-top:active {
    transform: translateY(-3px) scale(1.05);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 140px 0 80px;
    scroll-margin-top: 70px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    background: radial-gradient(circle at 30% 50%, var(--gradient-start) 0%, var(--gradient-end) 50%, var(--bg-primary) 100%);
}

.gradient-circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.3;
    filter: blur(60px);
}

.circle-1 {
    width: 600px;
    height: 600px;
    background: var(--accent-blue-light);
    top: -200px;
    left: -200px;
    animation: float 20s ease-in-out infinite;
}

.circle-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-blue);
    top: 50%;
    right: -100px;
    animation: float 15s ease-in-out infinite reverse;
}

.circle-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-blue-dark);
    bottom: -100px;
    left: 30%;
    animation: float 25s ease-in-out infinite;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    max-width: 600px;
}

.hero-title {
    font-size: 72px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    animation: gradientShift 3s ease infinite;
    background-size: 200% 200%;
}

@keyframes gradientShift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.hero-subtitle {
    font-size: 24px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 500;
}

.hero-description {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.5;
}

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

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 3px;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-primary);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
    z-index: 0;
}

.btn-primary::after {
    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 ease;
    z-index: 1;
}

.btn-primary:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary:hover::after {
    left: 100%;
}

.btn-primary > * {
    position: relative;
    z-index: 2;
}

.btn-primary:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15), 0 0 20px rgba(90, 200, 250, 0.3);
}

.btn-primary:active {
    transform: scale(0.98) translateY(0);
    box-shadow: var(--shadow-md);
    transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.btn-secondary {
    position: relative;
    overflow: hidden;
}

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
    z-index: 0;
}

.btn-secondary::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50px;
    padding: 2px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-dark));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

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

.btn-secondary:hover::after {
    opacity: 1;
}

.btn-secondary > * {
    position: relative;
    z-index: 2;
}

.btn-secondary:hover {
    transform: scale(1.05) translateY(-2px);
    background: var(--glass-bg);
    box-shadow: 0 6px 20px rgba(90, 200, 250, 0.2), var(--shadow-md);
    border-color: var(--accent-blue);
}

.btn-secondary:active {
    transform: scale(0.98) translateY(0);
    transition: transform 0.1s ease;
}

.btn-large {
    padding: 20px 48px;
    font-size: 18px;
}

/* ============================================
   AVATAR SECTION
   ============================================ */

.hero-avatar {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1000px;
}

.glass-layer {
    position: absolute;
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
}

.layer-1 {
    width: 320px;
    height: 400px;
    transform: translate(20px, 20px) rotate(5deg);
    z-index: 1;
    animation: float 6s ease-in-out infinite;
}

.layer-2 {
    width: 340px;
    height: 420px;
    transform: translate(-15px, -15px) rotate(-3deg);
    z-index: 2;
    animation: float 8s ease-in-out infinite reverse;
}

.avatar-card {
    position: relative;
    width: 300px;
    height: 380px;
    border-radius: 24px;
    background: linear-gradient(135deg, var(--glass-bg) 0%, rgba(255, 255, 255, 0.5) 100%);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    z-index: 3;
    animation: float 5s ease-in-out infinite;
    transition: transform 0.1s ease-out;
}

.avatar-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 24px;
    display: block;
}

/* Video avatar styling */
video.avatar-image,
video.about-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 24px;
    display: block;
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(90, 200, 250, 0.3);
    }
    50% {
        box-shadow: 0 0 30px rgba(90, 200, 250, 0.6);
    }
}

.fade-in {
    animation: fadeIn 1s ease-out;
}

.fade-in-up {
    opacity: 0;
    animation: slideUp 0.8s ease-out forwards;
}

.fade-in-left {
    opacity: 0;
    animation: slideInLeft 0.8s ease-out forwards;
}

.fade-in-right {
    opacity: 0;
    animation: slideInRight 0.8s ease-out forwards;
}

.scale-in {
    opacity: 0;
    animation: scaleIn 0.6s ease-out forwards;
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.delay-3 {
    animation-delay: 0.6s;
}

.delay-4 {
    animation-delay: 0.8s;
}

.delay-5 {
    animation-delay: 1s;
}

/* ============================================
   ABOUT SECTION
   ============================================ */

/* Section scroll margins for sticky nav */
section[id] {
    scroll-margin-top: 90px;
}

.about {
    padding: 140px 0;
    background: var(--bg-secondary);
}

.section-title {
    font-size: 56px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 80px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.about-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 80px;
    align-items: center;
}

.about-avatar-container {
    display: flex;
    justify-content: center;
}

.about-avatar {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: var(--shadow-xl);
    border: 4px solid var(--glass-bg);
}

.about-text {
    max-width: 700px;
}

.about-description {
    font-size: 20px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 60px;
}

.metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.metric-item {
    text-align: center;
    padding: 20px;
    border-radius: 16px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.metric-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(90, 200, 250, 0.05), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.metric-item:hover::before {
    opacity: 1;
}

.metric-item:hover {
    transform: translateY(-4px);
    background: var(--bg-primary);
    box-shadow: var(--shadow-md);
}

.metric-number {
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
    transition: transform 0.3s ease;
    position: relative;
    z-index: 1;
}

.metric-item:hover .metric-number {
    transform: scale(1.1);
}

.metric-label {
    font-size: 16px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    z-index: 1;
}

/* ============================================
   SKILLS PROGRESS SECTION
   ============================================ */

.skills-section {
    padding: 140px 0;
    background: var(--bg-secondary);
}

.skills-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.skill {
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 28px 32px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--glass-border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.skill::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(90, 200, 250, 0.1), transparent);
    transition: left 0.6s ease;
    z-index: 0;
}

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

.skill:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 30px rgba(90, 200, 250, 0.15), var(--shadow-lg);
    border-color: var(--accent-blue);
}

.skill > * {
    position: relative;
    z-index: 1;
}

.skill-name {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.skill-percent {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent-blue);
    background: linear-gradient(135deg, var(--accent-blue-light), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.progress-bar {
    width: 100%;
    height: 10px;
    background: var(--bg-secondary);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.08);
    margin-top: 12px;
}

[data-theme="dark"] .progress-bar {
    background: rgba(255, 255, 255, 0.08);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue-light), var(--accent-blue));
    border-radius: 10px;
    animation: fillBar 2s ease-out;
    box-shadow: 0 2px 8px rgba(90, 200, 250, 0.4);
    position: relative;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    animation: shimmer 3s infinite;
}

@keyframes fillBar {
    from {
        width: 0 !important;
    }
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ============================================
   TECHNICAL ARSENAL SECTION
   ============================================ */

.technical {
    padding: 140px 0;
    background: var(--bg-primary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.tech-card {
    background: var(--bg-primary);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--glass-border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    perspective: 1000px;
    will-change: transform;
    position: relative;
    overflow: hidden;
}

.tech-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-blue-light), var(--accent-blue), var(--accent-blue-dark));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.tech-card:hover::before {
    transform: scaleX(1);
}

.tech-card:hover {
    transform: translateY(-8px) rotateX(2deg) rotateY(2deg);
    box-shadow: 0 12px 40px rgba(90, 200, 250, 0.2), var(--shadow-xl);
    border-color: var(--accent-blue);
}

.tech-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--accent-blue-light), var(--accent-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: white;
    font-size: 28px;
}

.tech-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.tech-description {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* ============================================
   CERTIFICATIONS SECTION
   ============================================ */

.certifications {
    padding: 140px 0;
    background: var(--bg-primary);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.cert-card {
    background: var(--bg-secondary);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--glass-border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    will-change: transform;
    position: relative;
    overflow: hidden;
}

.cert-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(90, 200, 250, 0.1), transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.cert-card:hover::before {
    opacity: 1;
}

.cert-badge {
    transition: transform 0.4s ease;
}

.cert-card:hover .cert-badge {
    transform: scale(1.1) rotate(5deg);
    animation: pulse 2s ease-in-out infinite;
}

.cert-card:hover {
    transform: translateY(-8px) rotateX(2deg);
    box-shadow: 0 12px 40px rgba(90, 200, 250, 0.2), var(--shadow-xl);
    border-color: var(--accent-blue);
}

.cert-badge {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue-light), var(--accent-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: white;
    font-size: 36px;
    box-shadow: var(--shadow-md);
}

.cert-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.cert-issuer {
    font-size: 16px;
    color: var(--accent-blue);
    margin-bottom: 16px;
    font-weight: 500;
}

.cert-description {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.cert-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border);
    font-size: 12px;
    color: var(--text-secondary);
}

.cert-meta i {
    margin-right: 6px;
    color: var(--accent-blue);
}

.cert-status {
    color: #4caf50;
}

/* ============================================
   TESTIMONIALS SECTION
   ============================================ */

.testimonials {
    padding: 140px 0;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.testimonials-slider {
    max-width: 900px;
    margin: 0 auto 40px;
    position: relative;
}

.testimonial-card {
    display: none;
    background: var(--bg-primary);
    border-radius: 24px;
    padding: 50px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--glass-border);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateX(30px) scale(0.95);
    position: relative;
    overflow: hidden;
}

.testimonial-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-blue-light), var(--accent-blue), var(--accent-blue-dark));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.6s ease;
}

.testimonial-card.active::before {
    transform: scaleX(1);
}

.testimonial-card.active {
    display: block;
    opacity: 1;
    transform: translateX(0) scale(1);
}

.testimonial-quote {
    transition: transform 0.3s ease;
}

.testimonial-card.active .testimonial-quote {
    animation: pulse 2s ease-in-out infinite;
}

.testimonial-content {
    text-align: center;
}

.testimonial-quote {
    font-size: 48px;
    color: var(--accent-blue);
    opacity: 0.3;
    margin-bottom: 24px;
}

.testimonial-text {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.author-avatar {
    position: relative;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue-light), var(--accent-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    overflow: hidden;
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
}

.author-info {
    text-align: left;
}

.author-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.author-role {
    font-size: 14px;
    color: var(--text-secondary);
}

.testimonial-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
}

.testimonial-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 2px solid var(--glass-border);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    min-width: 50px;
    min-height: 50px;
}

.testimonial-btn:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 2px;
}

.testimonial-btn:hover {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
    transform: scale(1.1);
}

.testimonial-dots {
    display: flex;
    gap: 12px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--glass-border);
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    background: var(--accent-blue);
    transform: scale(1.3);
}

/* ============================================
   CASE STUDIES SECTION
   ============================================ */

.case-studies {
    padding: 140px 0;
    background: var(--bg-primary);
}

.case-studies-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.case-study-card {
    background: var(--bg-secondary);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--glass-border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    will-change: transform;
}

.case-study-card {
    position: relative;
    overflow: hidden;
}

.case-study-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(90, 200, 250, 0.03), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.case-study-card:hover::after {
    opacity: 1;
}

.case-study-icon {
    transition: transform 0.4s ease;
}

.case-study-card:hover .case-study-icon {
    transform: scale(1.1) rotate(5deg);
}

.case-study-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(90, 200, 250, 0.15), var(--shadow-xl);
    border-color: var(--accent-blue);
}

.case-study-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.case-study-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--accent-blue-light), var(--accent-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
}

.case-study-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
}

.case-study-category {
    font-size: 12px;
    padding: 4px 12px;
    background: var(--bg-primary);
    border-radius: 12px;
    color: var(--accent-blue);
    font-weight: 600;
}

.case-study-year {
    font-size: 12px;
    color: var(--text-secondary);
}

.case-study-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.case-study-client {
    font-size: 14px;
    color: var(--accent-blue);
    margin-bottom: 24px;
    font-weight: 500;
}

.case-study-content {
    margin-top: 24px;
}

.case-study-subtitle {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 20px;
    margin-bottom: 12px;
}

.case-study-text {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.case-study-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.case-study-results {
    list-style: none;
    padding: 0;
    margin: 0;
}

.case-study-results li {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 8px;
    padding-left: 24px;
    position: relative;
}

.case-study-results li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-blue);
    font-weight: bold;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */

.projects {
    padding: 140px 0;
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.project-card {
    background: var(--bg-primary);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--glass-border);
    transform-style: preserve-3d;
    perspective: 1000px;
    will-change: transform;
    position: relative;
}

.project-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(90, 200, 250, 0.05), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
    z-index: 1;
}

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

.project-card:hover {
    transform: translateY(-8px) rotateX(2deg) rotateY(-2deg);
    box-shadow: 0 12px 40px rgba(90, 200, 250, 0.2), var(--shadow-xl);
    border-color: var(--accent-blue);
}

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

.project-image {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
    border-radius: 16px 16px 0 0;
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.project-image {
    position: relative;
    width: 100%;
    height: 240px;
    background: linear-gradient(135deg, var(--accent-blue-light), var(--accent-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 16px 16px 0 0;
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.project-placeholder {
    font-size: 64px;
    color: white;
    opacity: 0.8;
}

.project-content {
    padding: 32px;
}

.project-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.project-description {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

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

.tag {
    padding: 6px 12px;
    background: var(--bg-secondary);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
}

.project-links {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--bg-secondary);
    border: 2px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.project-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-dark));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.project-link:hover::before {
    opacity: 1;
}

.project-link > * {
    position: relative;
    z-index: 1;
}

.project-link:hover {
    color: white;
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(90, 200, 250, 0.3);
}

.project-link:active {
    transform: translateY(0);
}

.project-link i {
    font-size: 16px;
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */

.experience {
    padding: 140px 0;
    background: var(--bg-primary);
}

.experience-timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    padding-left: 40px;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-blue), var(--accent-blue-dark));
}

.experience-item {
    margin-bottom: 60px;
    padding: 40px;
    background: var(--bg-secondary);
    border-radius: 24px;
    border-left: 4px solid var(--accent-blue);
    box-shadow: var(--shadow-md);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    will-change: transform;
    position: relative;
    opacity: 0;
    transform: translateX(-30px);
    cursor: pointer;
}

.experience-item.expanded {
    transform: translateX(0) scale(1.02);
}

.experience-item.expanded .experience-duties {
    max-height: 1000px;
    opacity: 1;
}

.experience-item::before {
    content: '';
    position: absolute;
    left: -52px;
    top: 50px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-blue);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 4px var(--accent-blue-light);
    transform: translateY(-50%);
    transition: all 0.3s ease;
}

.experience-item.animated {
    opacity: 1;
    transform: translateX(0);
}

.experience-item {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.experience-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--accent-blue-light), var(--accent-blue), var(--accent-blue-dark));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s ease;
}

.experience-item:hover::after {
    transform: scaleY(1);
}

.experience-item:hover {
    transform: translateX(8px) translateY(-4px);
    box-shadow: 0 12px 40px rgba(90, 200, 250, 0.15), var(--shadow-xl);
    border-left-width: 6px;
    border-left-color: var(--accent-blue);
}

.experience-item:hover::before {
    transform: translateY(-50%) scale(1.3);
    box-shadow: 0 0 0 6px var(--accent-blue-light);
}

.experience-date {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.experience-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.experience-company {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-weight: 500;
}

.experience-duties {
    list-style: none;
    padding: 0;
    max-height: 500px;
    overflow: hidden;
    transition: max-height 0.5s ease, opacity 0.5s ease;
    opacity: 1;
}

.experience-duties li {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 12px;
    padding-left: 24px;
    position: relative;
}

.experience-duties li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--accent-blue);
    font-weight: bold;
}

/* ============================================
   EDUCATION SECTION
   ============================================ */

.education {
    padding: 140px 0;
    background: var(--bg-secondary);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.education-card {
    background: var(--bg-primary);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--glass-border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    will-change: transform;
    position: relative;
    overflow: hidden;
}

.education-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-blue-light), var(--accent-blue), var(--accent-blue-dark));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.education-card:hover::after {
    transform: scaleX(1);
}

.education-icon {
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.education-card:hover .education-icon {
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(90, 200, 250, 0.4);
}

.education-card:hover {
    transform: translateY(-8px) rotateX(2deg);
    box-shadow: 0 12px 40px rgba(90, 200, 250, 0.2), var(--shadow-xl);
    border-color: var(--accent-blue);
}

.education-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue-light), var(--accent-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: white;
    font-size: 36px;
}

.education-degree {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.education-university {
    font-size: 18px;
    color: var(--accent-blue);
    margin-bottom: 12px;
    font-weight: 500;
}

.education-period {
    font-size: 14px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   BLOG SECTION
   ============================================ */

.blog {
    padding: 140px 0;
    background: var(--bg-primary);
}

.section-subtitle {
    text-align: center;
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 60px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.blog-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    background: var(--bg-secondary);
    border: 2px solid var(--glass-border);
    border-radius: 50px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.filter-btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.filter-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-dark));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.filter-btn:hover::before,
.filter-btn.active::before {
    opacity: 1;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 4px 12px rgba(90, 200, 250, 0.3);
}

.filter-btn:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 2px;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.blog-card {
    background: var(--bg-secondary);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--glass-border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    will-change: transform;
    display: flex;
    flex-direction: column;
}

.blog-card {
    position: relative;
    overflow: hidden;
}

.blog-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-blue-light), var(--accent-blue), var(--accent-blue-dark));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
    z-index: 1;
}

.blog-card:hover::before {
    transform: scaleX(1);
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(90, 200, 250, 0.15), var(--shadow-xl);
}

.blog-card:hover .blog-image {
    transform: scale(1.05);
}

.blog-image {
    transition: transform 0.4s ease;
}

.blog-card.hidden {
    display: none;
}

.blog-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--accent-blue-light), var(--accent-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.blog-placeholder {
    font-size: 64px;
    color: white;
    opacity: 0.8;
}

.blog-category {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 6px 12px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    color: white;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.blog-content {
    padding: 32px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.blog-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 12px;
    color: var(--text-secondary);
}

.blog-meta i {
    margin-right: 4px;
    color: var(--accent-blue);
}

.blog-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.3;
}

.blog-excerpt {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 20px;
    flex: 1;
}

.blog-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-blue);
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.blog-link:hover {
    gap: 12px;
    color: var(--accent-blue-dark);
}

.blog-link:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ============================================
   NEWSLETTER SECTION
   ============================================ */

.newsletter {
    padding: 140px 0;
    background: linear-gradient(135deg, var(--accent-blue-light), var(--accent-blue));
    text-align: center;
}

.newsletter-content {
    max-width: 700px;
    margin: 0 auto;
}

.newsletter-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    color: white;
    font-size: 36px;
}

.newsletter-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    color: white;
    letter-spacing: -0.02em;
}

.newsletter-description {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    line-height: 1.6;
}

.newsletter-form {
    max-width: 600px;
    margin: 0 auto;
}

.newsletter-input-group {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.newsletter-input {
    flex: 1;
    padding: 18px 24px;
    border-radius: 50px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
}

.newsletter-input:focus {
    border-color: white;
    background: white;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.2);
}

.newsletter-input::placeholder {
    color: var(--text-secondary);
}

.newsletter-btn {
    white-space: nowrap;
}

.newsletter-message {
    display: none;
    padding: 12px 20px;
    border-radius: 12px;
    margin-bottom: 12px;
    font-size: 14px;
    font-weight: 500;
}

.newsletter-message.success {
    display: block;
    background: rgba(76, 175, 80, 0.2);
    color: white;
    border: 2px solid rgba(76, 175, 80, 0.5);
}

.newsletter-message.error {
    display: block;
    background: rgba(244, 67, 54, 0.2);
    color: white;
    border: 2px solid rgba(244, 67, 54, 0.5);
}

.newsletter-privacy {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 16px;
}

.newsletter-privacy i {
    margin-right: 6px;
}

/* ============================================
   SOCIAL MEDIA INTEGRATION SECTION
   ============================================ */

.social-integration {
    padding: 140px 0;
    background: var(--bg-secondary);
}

.social-integration-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto;
}

.social-share,
.social-feeds {
    background: var(--bg-primary);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--glass-border);
}

.social-share-title,
.social-feeds-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.share-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 24px;
    border-radius: 12px;
    border: 2px solid var(--glass-border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.share-twitter:hover {
    background: #1da1f2;
    color: white;
    border-color: #1da1f2;
}

.share-linkedin:hover {
    background: #0077b5;
    color: white;
    border-color: #0077b5;
}

.share-facebook:hover {
    background: #1877f2;
    color: white;
    border-color: #1877f2;
}

.share-copy:hover {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

.share-btn:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 2px;
}

.social-feed-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.social-feed-card {
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.social-feed-card:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.feed-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.feed-header i {
    font-size: 24px;
    color: var(--accent-blue);
}

.feed-header h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.feed-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.feed-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-blue);
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.feed-link:hover {
    gap: 12px;
    color: var(--accent-blue-dark);
}

.feed-link:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact {
    padding: 140px 0;
    background: var(--bg-primary);
}

.contact-content {
    max-width: 900px;
    margin: 0 auto;
}

.contact-title {
    font-size: 64px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    text-align: left;
    line-height: 1.1;
}

.contact-description {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
    text-align: left;
    max-width: 650px;
}

.contact .btn {
    margin-bottom: 60px;
    display: inline-flex;
}

/* ============================================
   CONTACT FORM
   ============================================ */

.contact-form {
    max-width: 600px;
    margin: 40px auto 60px;
    text-align: left;
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-input {
    width: 100%;
    padding: 16px 20px;
    font-size: 16px;
    font-family: inherit;
    background: var(--bg-secondary);
    border: 2px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
    position: relative;
}

.form-input:hover {
    border-color: var(--accent-blue-light);
    background: var(--bg-primary);
}

.form-input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 4px rgba(90, 200, 250, 0.15), 0 4px 12px rgba(90, 200, 250, 0.1);
    background: var(--bg-primary);
    transform: translateY(-2px);
}

.form-input:focus::placeholder {
    color: transparent;
    transition: color 0.3s ease;
}

.form-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
}

.form-error {
    display: none;
    color: #ff4444;
    font-size: 12px;
    margin-top: 6px;
    font-weight: 500;
}

.form-message {
    display: none;
    padding: 16px 20px;
    border-radius: 12px;
    margin-top: 20px;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
}

.form-message.success {
    background: rgba(76, 175, 80, 0.1);
    color: #4caf50;
    border: 2px solid rgba(76, 175, 80, 0.3);
}

.form-message.error {
    background: rgba(244, 67, 54, 0.1);
    color: #f44336;
    border: 2px solid rgba(244, 67, 54, 0.3);
}

.form-message.info {
    background: rgba(33, 150, 243, 0.1);
    color: #2196f3;
    border: 2px solid rgba(33, 150, 243, 0.3);
}

#submitBtn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#submitBtn .fa-spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.contact-info {
    margin: 60px 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
}

.contact-detail {
    font-size: 18px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin: 0;
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 8px 16px;
    border-radius: 8px;
}

.contact-detail:hover {
    color: var(--accent-blue);
    background: var(--bg-secondary);
    transform: translateX(5px);
}

.contact-info a.contact-detail {
    cursor: pointer;
}

.contact-detail i {
    color: var(--accent-blue);
    font-size: 20px;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.contact-detail span {
    display: inline-block;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
}

.social-link {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #000000;
    font-size: 24px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .social-link {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.social-link {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.social-link::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-dark));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.social-link:hover::before {
    opacity: 1;
}

.social-link:hover {
    transform: translateY(-4px) scale(1.1);
    box-shadow: 0 8px 20px rgba(90, 200, 250, 0.3);
    border-color: var(--accent-blue);
    color: white;
}

.social-link i {
    color: inherit;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    padding: 40px 0;
    background: var(--bg-primary);
    text-align: center;
    border-top: 1px solid var(--glass-border);
}

.footer-text {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }
    
    .hero-avatar {
        justify-self: center;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 24px;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .hero-description {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 40px;
        margin-bottom: 60px;
    }
    
    .about {
        padding: 100px 0;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .metrics {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .technical,
    .projects,
    .certifications,
    .testimonials,
    .case-studies,
    .experience,
    .education,
    .contact {
        padding: 100px 0;
    }
    
    .experience-item {
        padding: 30px;
    }
    
    .experience-timeline {
        padding-left: 30px;
    }
    
    .experience-item::before {
        left: -42px;
    }
    
    .loader-text {
        font-size: 20px;
    }
    
    .loader-icon {
        width: 60px;
        height: 60px;
    }
    
    .loader-icon i {
        font-size: 45px;
    }
    
    .particle-canvas {
        display: none; /* Hide on mobile for performance */
    }
    
    .education-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-grid,
    .projects-grid,
    .certifications-grid,
    .case-studies-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .social-integration-content {
        grid-template-columns: 1fr;
    }
    
    .newsletter-input-group {
        flex-direction: column;
    }
    
    .newsletter-btn {
        width: 100%;
    }
    
    .share-buttons {
        grid-template-columns: 1fr;
    }
    
    .testimonials-slider {
        padding: 0 20px;
    }
    
    .testimonial-card {
        padding: 40px 30px;
    }
    
    .testimonial-text {
        font-size: 16px;
    }
    
    .case-study-card {
        padding: 30px;
    }
    
    .avatar-card {
        width: 250px;
        height: 320px;
    }
    
    .layer-1 {
        width: 270px;
        height: 340px;
    }
    
    .layer-2 {
        width: 290px;
        height: 360px;
    }
    
    .contact-title {
        font-size: 48px;
        text-align: center;
    }
    
    .contact-description {
        text-align: center;
        max-width: 100%;
    }
    
    .contact-form {
        max-width: 100%;
    }
    
    .contact .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 36px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .theme-toggle {
        top: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}