:root {
    /* Modern Color Palette */
    --primary-color: #10b981;
    --primary-dark: #059669;
    --primary-light: #6ee7b7;
    --secondary-color: #34d399;
    --secondary-dark: #10b981;
    --accent-color: #22d3ee;
    --accent-dark: #0ea5e9;
    
    /* Neutral Colors */
    --background-color: #000000;
    --surface-color: #1a1a1a;
    --surface-light: #2d2d2d;
    --glass-color: rgba(255, 255, 255, 0.05);
    --text-color: #ffffff;
    --text-muted: #a3a3a3;
    --text-light: #d4d4d4;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.3);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    --gradient-secondary: linear-gradient(135deg, #22d3ee 0%, #34d399 100%);
    --gradient-surface: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    --gradient-border: linear-gradient(135deg, rgba(16, 185, 129, 0.3) 0%, rgba(52, 211, 153, 0.3) 100%);
    
    /* Typography */
    --font-family: 'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    
    /* 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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
}

/* Light Theme */
[data-theme="light"] {
    --background-color: #efefef;
    --surface-color: #ffffff;
    --surface-light: #f1f5f9;
    --glass-color: rgba(255, 255, 255, 0.8);
    --text-color: #1e293b;
    --text-muted: #64748b;
    --text-light: #475569;
    --border-color: rgba(0, 0, 0, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --gradient-surface: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.6) 100%);
}

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

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

body {
    font-family: var(--font-family);
    background: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    transition: all var(--transition-normal);
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}





/* Animated Background */
.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    background: var(--gradient-primary);
    border-radius: 50%;
    opacity: 0.1;
    animation: float 20s infinite linear;
    transition: all var(--transition-normal);
}

.shape:nth-child(even) {
    background: var(--gradient-secondary);
}

.shape:nth-child(3n) {
    background: var(--gradient-border);
    opacity: 0.15;
}

.shape:nth-child(4n) {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    opacity: 0.08;
}

.shape:nth-child(5n) {
    animation: floatPulse 20s infinite ease-in-out;
}

.shape:nth-child(6n) {
    animation: floatCrossfade 26s infinite linear;
}

.shape:hover {
    opacity: 0.3;
    transform: scale(1.1);
}

.shape-1 {
    width: 100px;
    height: 100px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 150px;
    height: 150px;
    top: 60%;
    right: 10%;
    animation-delay: -5s;
}

.shape-3 {
    width: 80px;
    height: 80px;
    bottom: 20%;
    left: 20%;
    animation-delay: -10s;
}

.shape-4 {
    width: 120px;
    height: 120px;
    top: 30%;
    right: 30%;
    animation-delay: -15s;
}

.shape-5 {
    width: 200px;
    height: 200px;
    bottom: 10%;
    right: 20%;
    animation-delay: -20s;
}

.shape-6 {
    width: 90px;
    height: 90px;
    top: 5%;
    left: 50%;
    animation: floatReverse 25s infinite linear;
    animation-delay: -3s;
}

.shape-7 {
    width: 60px;
    height: 60px;
    top: 70%;
    left: 5%;
    animation: floatSlow 30s infinite linear;
    animation-delay: -8s;
}

.shape-8 {
    width: 180px;
    height: 180px;
    top: 40%;
    left: 70%;
    animation: floatDiagonal 35s infinite linear;
    animation-delay: -12s;
}

.shape-9 {
    width: 70px;
    height: 70px;
    bottom: 30%;
    right: 5%;
    animation: floatBounce 18s infinite ease-in-out;
    animation-delay: -6s;
}

.shape-10 {
    width: 130px;
    height: 130px;
    top: 15%;
    right: 45%;
    animation: floatWobble 22s infinite ease-in-out;
    animation-delay: -14s;
}

.shape-11 {
    width: 50px;
    height: 50px;
    bottom: 50%;
    left: 80%;
    animation: floatSpiral 28s infinite linear;
    animation-delay: -18s;
}

.shape-12 {
    width: 110px;
    height: 110px;
    top: 80%;
    left: 30%;
    animation: floatReverse 32s infinite linear;
    animation-delay: -22s;
}

.shape-13 {
    width: 85px;
    height: 85px;
    top: 25%;
    left: 5%;
    animation: floatSlow 24s infinite linear;
    animation-delay: -16s;
}

.shape-14 {
    width: 40px;
    height: 40px;
    bottom: 5%;
    left: 60%;
    animation: floatBounce 16s infinite ease-in-out;
    animation-delay: -10s;
}

.shape-15 {
    width: 160px;
    height: 160px;
    top: 55%;
    right: 15%;
    animation: floatDiagonal 40s infinite linear;
    animation-delay: -25s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-20px) rotate(90deg);
    }
    50% {
        transform: translateY(-40px) rotate(180deg);
    }
    75% {
        transform: translateY(-20px) rotate(270deg);
    }
}

@keyframes floatReverse {
    0%, 100% {
        transform: translateY(0) rotate(360deg);
    }
    25% {
        transform: translateY(20px) rotate(270deg);
    }
    50% {
        transform: translateY(40px) rotate(180deg);
    }
    75% {
        transform: translateY(20px) rotate(90deg);
    }
}

@keyframes floatSlow {
    0%, 100% {
        transform: translateX(0) translateY(0) rotate(0deg) scale(1);
    }
    25% {
        transform: translateX(-30px) translateY(-15px) rotate(90deg) scale(1.1);
    }
    50% {
        transform: translateX(-60px) translateY(-30px) rotate(180deg) scale(0.9);
    }
    75% {
        transform: translateX(-30px) translateY(-15px) rotate(270deg) scale(1.05);
    }
}

@keyframes floatDiagonal {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    25% {
        transform: translate(50px, -25px) rotate(180deg);
    }
    50% {
        transform: translate(100px, -50px) rotate(360deg);
    }
    75% {
        transform: translate(50px, -25px) rotate(540deg);
    }
}

@keyframes floatBounce {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    25% {
        transform: translateY(-30px) scale(1.1);
    }
    50% {
        transform: translateY(-60px) scale(0.9);
    }
    75% {
        transform: translateY(-30px) scale(1.05);
    }
}

@keyframes floatWobble {
    0%, 100% {
        transform: translateX(0) rotate(0deg);
    }
    25% {
        transform: translateX(-20px) rotate(45deg);
    }
    50% {
        transform: translateX(20px) rotate(-45deg);
    }
    75% {
        transform: translateX(-10px) rotate(22.5deg);
    }
}

@keyframes floatSpiral {
    0% {
        transform: rotate(0deg) translateX(30px) rotate(0deg);
    }
    25% {
        transform: rotate(90deg) translateX(40px) rotate(-90deg);
    }
    50% {
        transform: rotate(180deg) translateX(50px) rotate(-180deg);
    }
    75% {
        transform: rotate(270deg) translateX(40px) rotate(-270deg);
    }
    100% {
        transform: rotate(360deg) translateX(30px) rotate(-360deg);
    }
}

@keyframes floatPulse {
    0%, 100% {
        transform: scale(1) rotate(0deg);
        opacity: 0.1;
    }
    25% {
        transform: scale(1.3) rotate(90deg);
        opacity: 0.2;
    }
    50% {
        transform: scale(0.7) rotate(180deg);
        opacity: 0.05;
    }
    75% {
        transform: scale(1.1) rotate(270deg);
        opacity: 0.15;
    }
}

@keyframes floatCrossfade {
    0%, 100% {
        transform: translateX(-100px) translateY(0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.1;
    }
    50% {
        transform: translateX(100px) translateY(-50px) rotate(180deg);
        opacity: 0.2;
    }
    90% {
        opacity: 0.1;
    }
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 50%;
    right: 2rem;
    transform: translateY(-50%);
    width: 3rem;
    height: 3rem;
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    z-index: 1001;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
}

.theme-toggle:hover {
    transform: translateY(-50%) scale(1.1);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl);
}

.theme-toggle::before {
    content: '🌙';
    font-size: 1.25rem;
    transition: all var(--transition-normal);
}

[data-theme="light"] .theme-toggle::before {
    content: '☀️';
}

/* Header */
header {
    background: #021611;
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-fast);
}

[data-theme="light"] header {
    background: rgba(248, 250, 252, 0.8);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform var(--transition-normal);
}

.logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 800;
    font-size: 1rem;
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation */
nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-xs);
}

nav ul li a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    position: relative;
}

nav ul li a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

nav ul li a:hover {
    color: var(--primary-color);
}

nav ul li a:hover::before {
    width: 80%;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-color);
    transition: all var(--transition-normal);
}

/* Main Content */
main {
    padding-top: 5rem;
}

/* Section Styles */
section {
    padding: var(--spacing-3xl) var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(3rem);
    transition: all 1s ease-out;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 50%;
    transform: translateX(-50%);
    width: 4rem;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--spacing-3xl);
    padding: var(--spacing-3xl) var(--spacing-lg);
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-2xl);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    animation-delay: 0.2s;
}

.hero-content h1 {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    animation-delay: 0.4s;
}

.hero-content .highlight {
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content > p {
    font-size: 1.25rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
    animation-delay: 0.6s;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    animation-delay: 0.8s;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.cta-button.primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-lg);
}

.cta-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.cta-button.secondary {
    background: transparent;
    color: var(--text-color);
    border-color: var(--border-color);
}

.cta-button.secondary:hover {
    background: var(--surface-color);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    animation-delay: 1s;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation-delay: 0.6s;
}

.code-snippet {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-2xl);
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 500px;
}

.code-header {
    background: var(--surface-light);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.code-dots {
    display: flex;
    gap: var(--spacing-xs);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.code-title {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.code-content {
    padding: var(--spacing-lg);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
}

.code-line {
    margin-bottom: var(--spacing-xs);
}

.keyword { color: #c792ea; }
.class-name { color: #ffcb6b; }
.function { color: #82aaff; }
.string { color: #c3e88d; }
.indent { margin-left: 2rem; }
.indent2 { margin-left: 4rem; }

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.about-image {
    position: relative;
    display: flex;
    justify-content: center;
}

.profile-pic {
    width: 300px;
    height: 400px;
    object-fit: cover;
    transition: all var(--transition-slow);
    box-shadow: var(--shadow-xl), 0 0 20px rgba(16, 185, 129, 0.4);
    border: 3px solid var(--primary-color);
    object-position: center top;
    
    /* Stylish polygon shape */
    clip-path: polygon(20% 0%, 80% 0%, 100% 20%, 100% 80%, 80% 100%, 20% 100%, 0% 80%, 0% 20%);
    
    /* Add a subtle glow effect */
    filter: drop-shadow(0 0 15px rgba(16, 185, 129, 0.3));
    
    /* Smooth edges */
    -webkit-clip-path: polygon(20% 0%, 80% 0%, 100% 20%, 100% 80%, 80% 100%, 20% 100%, 0% 80%, 0% 20%);
}

.profile-pic:hover {
    transform: scale(1.05) rotate(2deg);
    box-shadow: var(--shadow-xl), 0 0 30px rgba(16, 185, 129, 0.6);
    filter: drop-shadow(0 0 25px rgba(16, 185, 129, 0.5)) brightness(1.1);
    
    /* Slightly different polygon on hover for dynamic effect */
    clip-path: polygon(15% 0%, 85% 0%, 100% 15%, 100% 85%, 85% 100%, 15% 100%, 0% 85%, 0% 15%);
    -webkit-clip-path: polygon(15% 0%, 85% 0%, 100% 15%, 100% 85%, 85% 100%, 15% 100%, 0% 85%, 0% 15%);
}

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

.about-text p {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.highlight-item:hover {
    transform: translateX(var(--spacing-xs));
    border-color: var(--primary-color);
}

.highlight-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    width: 2rem;
    text-align: center;
}

.highlight-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.highlight-item p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.about-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--text-color);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background: var(--surface-color);
    transform: translateY(-2px);
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.service-card {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: var(--primary-color);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.service-icon {
    width: 4rem;
    height: 4rem;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.service-card:hover .service-icon {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.service-icon i {
    font-size: 1.5rem;
    color: white;
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
    transition: color var(--transition-normal);
}

.service-card:hover h3 {
    color: var(--primary-color);
}

.service-card p {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.service-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.service-card ul li {
    padding: var(--spacing-xs) 0;
    color: var(--text-light);
    position: relative;
    padding-left: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.service-card ul li:hover {
    color: var(--primary-color);
    padding-left: var(--spacing-xl);
}

.service-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.875rem;
}

.service-card ul li:last-child {
    border-bottom: none;
}

/* Skills Section */
.skills-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.skill-category {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.skill-category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl);
    cursor: pointer;
    user-select: none;
    transition: all var(--transition-normal);
}

.skill-category-header:hover {
    background: var(--surface-light);
}

.skill-category-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    color: #10b981;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.skill-category-header h3 i {
    font-size: 1.25rem;
    color: #10b981;
    background: linear-gradient(135deg, #10b981, #059669);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.dropdown-arrow {
    font-size: 1.25rem;
    color: var(--text-secondary);
    transition: transform var(--transition-normal);
}

.skill-category.active .dropdown-arrow {
    transform: rotate(180deg);
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition-slow);
    opacity: 0;
}

.skill-category.active .skill-items {
    max-height: 1000px;
    padding: var(--spacing-md) var(--spacing-xl) var(--spacing-xl) var(--spacing-xl);
    opacity: 1;
}

.skill-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--surface-light);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateY(-10px);
    animation: fadeInUp 0.3s ease-out forwards;
}

.skill-category.active .skill-item {
    opacity: 1;
    transform: translateY(0);
}

.skill-item:hover {
    transform: translateX(var(--spacing-xs));
    background: var(--surface-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.skill-item img {
    width: 3rem;
    height: 3rem;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.skill-info {
    flex: 1;
}

.skill-info h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--text-color);
}

.skill-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* Animation keyframes */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Staggered animation for skill items */
.skill-category.active .skill-item:nth-child(1) { animation-delay: 0.1s; }
.skill-category.active .skill-item:nth-child(2) { animation-delay: 0.2s; }
.skill-category.active .skill-item:nth-child(3) { animation-delay: 0.3s; }
.skill-category.active .skill-item:nth-child(4) { animation-delay: 0.4s; }
.skill-category.active .skill-item:nth-child(5) { animation-delay: 0.5s; }

/* Experience Section */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--gradient-primary);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: calc(50% + 2rem);
}

.timeline-item:nth-child(even) {
    justify-content: flex-end;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-right: calc(50% + 2rem);
    text-align: right;
}

.timeline-icon {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3rem;
    height: 3rem;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.125rem;
    z-index: 2;
    border: 4px solid var(--background-color);
}

.timeline-content {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    width: 45%;
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    transform: translateY(-var(--spacing-xs));
    box-shadow: var(--shadow-lg);
}

.timeline-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.timeline-content h4 {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.timeline-date {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    display: block;
}

.timeline-content p {
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
}

/* Projects Section */
.projects-filter {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--border-color);
    background: transparent;
    color: var(--text-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(16, 185, 129, 0.1);
}

.projects-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    align-items: stretch;
}

.project-card {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 320px;
    height: 100%;
}

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

.project-image {
    display: none;
}

.project-image img {
    display: none;
}

.project-card:hover .project-image img {
    display: none;
}

.project-overlay {
    display: none;
}

.project-card:hover .project-overlay {
    display: none;
}

.project-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: auto;
    padding-top: var(--spacing-md);
}

.btn-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all var(--transition-normal);
    font-size: 1rem;
}

.btn-icon:hover {
    transform: scale(1.1);
    background: var(--primary-dark);
}

.project-content {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
    border-radius: var(--radius-xl);
    justify-content: space-between;
    min-height: 100%;
}

.project-content > p {
    flex: 1;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.project-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
}

.project-status {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--gradient-primary);
    color: white;
}

.project-content p {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    margin-top: auto;
}

.tech-tag {
    padding: 0.25rem 0.75rem;
    background: var(--surface-light);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

/* Articles Section */
.articles-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    justify-content: center;
    max-width: 1200px;
    margin: 0 auto;
}

@media (min-width: 769px) {
    .articles-container {
        grid-template-columns: repeat(auto-fill, minmax(350px, 400px));
    }
}

.article-card {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.article-card:hover {
    transform: translateY(-var(--spacing-sm));
    box-shadow: var(--shadow-xl);
}

.article-image {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

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

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

.article-date {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    text-align: center;
    font-weight: 600;
    min-width: 3rem;
}

.article-date .day {
    display: block;
    font-size: 1.25rem;
    line-height: 1;
}

.article-date .month {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.article-content {
    padding: var(--spacing-lg);
}

.article-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--surface-light);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.article-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.article-content p {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.article-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* Contact Section */
.contact-content {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.contact-info {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
    max-width: 600px;
    width: 100%;
    margin: 0 auto;
}

.contact-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.contact-info > p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.contact-details {
    margin-bottom: var(--spacing-xl);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-icon {
    width: 3rem;
    height: 3rem;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.125rem;
}

.contact-text h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

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

.contact-text a {
  word-break: break-all;
  display: inline-block;
  max-width: 100%;
  overflow-wrap: break-word;
}


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

.social-links h4 {
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
    font-weight: 600;
}

.social-icons {
    display: flex;
    gap: var(--spacing-md);
}

.social-icons a {
    width: 3rem;
    height: 3rem;
    background: var(--surface-light);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    font-size: 1.125rem;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.social-icons a:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

/* Upwork icon theme switching */
.upwork-icon {
    width: 30px;
    height: 30px;
    transition: all var(--transition-normal);
    border-radius: 3px;
    object-fit: contain;
}

/* Default (dark mode) - show light icon */
.upwork-icon.light {
    display: block;
}

.upwork-icon.dark {
    display: none;
}

/* Light theme - show dark icon */
[data-theme="light"] .upwork-icon.light {
    display: none;
}

[data-theme="light"] .upwork-icon.dark {
    display: block;
}

/* Contact Form */
.contact-form {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.contact-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-light);
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-color);
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: var(--font-family);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
    background: rgba(255, 255, 255, 0.08);
}

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

.submit-btn {
    width: 100%;
    padding: 0.875rem 1.5rem;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.submit-btn i {
    transition: transform 0.3s ease;
}

.submit-btn:hover:not(:disabled) i {
    transform: translateX(3px);
}

/* Form Validation States */
.form-group input.error,
.form-group textarea.error {
    border-color: #ff4757;
    box-shadow: 0 0 0 3px rgba(255, 71, 87, 0.1);
    background: rgba(255, 71, 87, 0.05);
}

.form-group input.error:focus,
.form-group textarea.error:focus {
    border-color: #ff4757;
    box-shadow: 0 0 0 3px rgba(255, 71, 87, 0.2);
}

.form-group input:valid,
.form-group textarea:valid {
    border-color: var(--primary-color);
}

.form-group input:valid:focus,
.form-group textarea:valid:focus {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

/* Loading state for form */
.contact-form.loading {
    pointer-events: none;
    opacity: 0.7;
}

.contact-form.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(2px);
    z-index: 1;
}

/* Notification with HTML content */
.notification span {
    flex: 1;
    line-height: 1.4;
}

.notification button {
    all: inherit;
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 3px;
    transition: background 0.2s ease;
}

.notification button:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Notification System */
.notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    max-width: 400px;
    pointer-events: none;
}

.notification {
    background: var(--glass-color);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    animation: slideInRight 0.3s ease-out;
    pointer-events: auto;
    position: relative;
    overflow: hidden;
}

.notification::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
}

.notification.success::before {
    background: var(--primary-color);
}

.notification.error::before {
    background: #ff4757;
}

.notification.info::before {
    background: var(--accent-color);
}

.notification i {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.notification.success i {
    color: var(--primary-color);
}

.notification.error i {
    color: #ff4757;
}

.notification.info i {
    color: var(--accent-color);
}

.notification-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    margin-left: auto;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.notification-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
}

.notification.fade-out {
    animation: slideOutRight 0.3s ease-in forwards;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* Footer Section */
footer {
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-lg);
    margin-top: var(--spacing-3xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.footer-section p {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section ul li a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-normal);
    font-weight: 500;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.footer-social a {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--surface-light);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    font-size: 1.125rem;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.footer-social a:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-2px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

/* Footer Upwork icon styling */
.footer-social a .upwork-icon {
    width: 20px;
    height: 20px;
    border-radius: 2px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-bottom p {
    margin: 0;
}

/* Responsive Design */
@media (min-width: 1200px) {
    .projects-container {
        grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    }
    
    .project-image {
        aspect-ratio: 16/9;
        min-height: 220px;
    }
}

@media (max-width: 1024px) and (min-width: 769px) {
    .projects-container {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: var(--spacing-lg);
    }
    
    .project-image {
        aspect-ratio: 16/9;
        min-height: 180px;
    }
}

@media (max-width: 1024px) {
    .hero-section {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .contact-content {
        display: flex;
        justify-content: center;
        align-items: center;
        min-height: 50vh;
        padding: 0 var(--spacing-md);
    }
    
    .contact-info {
        padding: var(--spacing-lg);
        max-width: 100%;
        margin: 0;
    }
    
    .contact-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-md);
        padding: var(--spacing-sm);
        background: var(--surface-light);
        border-radius: var(--radius-md);
        border: 1px solid var(--border-color);
    }
    
    .contact-icon {
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1rem;
    }
    
    .contact-text {
        width: 100%;
    }
    
    .contact-text h4 {
        font-size: 0.9rem;
        margin-bottom: 0.125rem;
    }
    
    .contact-text p,
    .contact-text a {
        font-size: 0.85rem;
        line-height: 1.4;
    }
    
    .social-icons {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
        justify-content: center;
    }
    
    .social-icons a {
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1rem;
    }
    
    .timeline::before {
        left: 2rem;
    }
    
    .timeline-item {
        justify-content: flex-start;
    }
    
    .timeline-item .timeline-content {
        margin-left: 4rem;
        margin-right: 0;
        text-align: left;
        width: auto;
    }
    
    .timeline-item:nth-child(even) {
        justify-content: flex-start;
    }
    
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 4rem;
        margin-right: 0;
        text-align: left;
    }
    
    .timeline-icon {
        left: 2rem;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    nav ul {
        display: none;
    }
    
    /* Hide Experience navigation link on mobile */
    nav ul li a[href="#experience"] {
        display: none !important;
    }
    
    .theme-toggle {
        right: 1rem;
        width: 2.5rem;
        height: 2.5rem;
    }
    
    nav {
        padding: 0 var(--spacing-lg);
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .project-card {
        max-width: 100%;
    }
    
    .project-image {
        aspect-ratio: 16/9;
        min-height: 200px;
    }
    
    .project-image img {
        object-fit: cover;
        object-position: center;
    }
    
    .articles-container {
        grid-template-columns: 1fr;
        max-width: 100%;
        gap: var(--spacing-lg);
    }
    
    .about-highlights {
        gap: var(--spacing-sm);
    }
    
    .about-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* Tablet-specific responsive design */
@media (max-width: 900px) and (min-width: 769px) {
    .articles-container {
        grid-template-columns: repeat(auto-fill, minmax(300px, 350px));
        justify-content: center;
        gap: var(--spacing-lg);
    }
    
    .contact-content {
        padding: 0 var(--spacing-xl);
    }
    
    .contact-info {
        max-width: 500px;
        padding: var(--spacing-xl);
    }
    
    .contact-item {
        flex-direction: row;
        align-items: center;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }
    
    .social-icons {
        gap: var(--spacing-md);
    }
}

/* Hide Experience & Education section on mobile */
@media (max-width: 768px) {
    #experience {
        display: none !important;
    }
}

/* Extra small screens (phones in portrait) */
@media (max-width: 480px) {
    .contact-content {
        padding: 0 var(--spacing-sm);
        min-height: 40vh;
    }
    
    .contact-info {
        padding: var(--spacing-md);
        border-radius: var(--radius-lg);
    }
    
    .contact-info h3 {
        font-size: 1.25rem;
        text-align: center;
        margin-bottom: var(--spacing-md);
    }
    
    .contact-info > p {
        font-size: 0.9rem;
        text-align: center;
        margin-bottom: var(--spacing-lg);
    }
    
    .contact-details {
        margin-bottom: var(--spacing-lg);
    }
    
    .contact-item {
        flex-direction: row;
        align-items: center;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-sm);
    }
    
    .contact-icon {
        width: 2.25rem;
        height: 2.25rem;
        font-size: 0.9rem;
        flex-shrink: 0;
    }
    
    .contact-text h4 {
        font-size: 0.85rem;
        font-weight: 600;
    }
    
    .contact-text p,
    .contact-text a {
        font-size: 0.8rem;
        line-height: 1.3;
    }
    
    .contact-text a {
        word-break: break-all;
        hyphens: auto;
    }
    
    .social-links {
        text-align: center;
    }
    
    .social-links h4 {
        font-size: 1rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .social-icons {
        justify-content: center;
        gap: var(--spacing-sm);
    }
    
    .social-icons a {
        width: 2.25rem;
        height: 2.25rem;
        font-size: 0.9rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(2rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-2rem);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(2rem);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive design for skills dropdown */
@media (max-width: 768px) {
    .skill-category-header {
        padding: var(--spacing-lg);
    }
    
    .skill-category-header h3 {
        font-size: 1.25rem;
    }
    
    .skill-category-header h3 i {
        font-size: 1.1rem;
    }
    
    .skill-items {
        padding: 0;
    }
    
    .skill-category.active .skill-items {
        padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg) var(--spacing-lg);
    }
    
    .skill-item {
        padding: var(--spacing-sm);
    }
    
    .skill-item img {
        width: 2.5rem;
        height: 2.5rem;
    }
    
    .skill-info h4 {
        font-size: 1rem;
    }
    
    .skill-info p {
        font-size: 0.8rem;
    }
}

/* Smooth scrolling improvements */
html {
    scroll-padding-top: 6rem;
}

/* Selection styles */
::selection {
    background: var(--primary-color);
    color: white;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface-color);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .theme-toggle,
    .hamburger,
    .floating-shapes,
    .animated-bg {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    section {
        break-inside: avoid;
    }
}

/* Loading Screen Styles */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--background-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: opacity 0.5s ease-out, visibility 0.5s ease-out;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-container {
    text-align: center;
}

.spinner {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-xl);
}

.spinner-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid transparent;
    border-top-color: var(--primary-color);
    border-right-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1.2s linear infinite;
}

.spinner-ring:nth-child(2) {
    width: 85%;
    height: 85%;
    top: 7.5%;
    left: 7.5%;
    border-top-color: var(--secondary-color);
    border-right-color: transparent;
    animation-duration: 1.5s;
    animation-direction: reverse;
}

.spinner-ring:nth-child(3) {
    width: 70%;
    height: 70%;
    top: 15%;
    left: 15%;
    border-top-color: var(--accent-color);
    border-right-color: var(--accent-color);
    animation-duration: 1.8s;
}

.spinner-logo {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 50px;
    height: 50px;
    margin-top: -25px;
    margin-left: -25px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
    z-index: 1;
    animation: pulseGlow 2s ease-in-out infinite;
}

.spinner-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
    }
    50% {
        box-shadow: 0 0 30px rgba(16, 185, 129, 0.6);
    }
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
        transform: scale(1);
    }
    50% {
        box-shadow: 0 0 30px rgba(16, 185, 129, 0.6);
        transform: scale(1.05);
    }
}

.loading-text {
    margin-top: var(--spacing-md);
}

.loading-text h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInOut 2s ease-in-out infinite;
}

@keyframes fadeInOut {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
    }
}

/* Certificates Section Styles */
#certificates {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: transparent;
}

.certificates-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
}

.certificate-card {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    position: relative;
}

.certificate-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: 0 20px 40px rgba(16, 185, 129, 0.15);
}

.certificate-image-link {
    display: block;
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.certificate-image {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
    background: var(--surface-light);
}

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

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

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

.certificate-image-link:hover .certificate-overlay {
    opacity: 1;
}

.certificate-overlay i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.certificate-overlay span {
    color: white;
    font-weight: 600;
    font-size: 1rem;
}

.certificate-content {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    flex: 1;
}

.certificate-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.certificate-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.certificate-icon i {
    font-size: 1.5rem;
    color: white;
}

.certificate-issuer {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.issuer-name {
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.95rem;
}

.issue-date {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.certificate-content h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-color);
    line-height: 1.4;
}

.certificate-content p {
    color: var(--text-muted);
    line-height: 1.6;
    font-size: 0.95rem;
    flex: 1;
}

.certificate-footer {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: auto;
}

.verify-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-normal);
    justify-content: center;
}

.verify-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(16, 185, 129, 0.3);
}

.verify-btn i {
    font-size: 1rem;
}

.certificate-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.certificate-tags .tag {
    padding: 0.35rem 0.75rem;
    background: var(--surface-light);
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.certificate-tags .tag:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Responsive Certificates */
@media (max-width: 768px) {
    .certificates-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        padding: var(--spacing-md) 0;
    }
    
    .certificate-image {
        height: 200px;
    }
    
    .certificate-content h3 {
        font-size: 1.2rem;
    }
}

/* Performance: Reduce animations on low-end devices */
@media (prefers-reduced-motion: reduce) {
    .loading-screen,
    .spinner-ring,
    .loading-progress,
    .certificate-card,
    .certificate-image img {
        animation: none !important;
        transition: none !important;
    }
}

/* Lazy loading placeholder */
img[loading="lazy"] {
    background: var(--surface-light);
}