/* CSS Variables for Theme */
:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* Light Theme */
    --bg-color: #ffffff;
    --surface-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --border-color: #e5e7eb;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --navbar-bg: rgba(255, 255, 255, 0.95);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 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);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Theme */
body.dark-mode {
    --bg-color: #0f172a;
    --surface-color: #1e293b;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-color: #374151;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --navbar-bg: rgba(15, 23, 42, 0.95);
}

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

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

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: var(--font-size-base);
    text-decoration: none;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

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

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

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

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

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

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

.btn-sm {
    padding: var(--spacing-md);
    font-size: var(--font-size-sm);
}

.btn-full {
    width: 100%;
}


/* Section Styles */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    border-radius: var(--radius-full);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

.section-title-small {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--navbar-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all var(--transition-normal);
    border-bottom: 1px solid var(--border-color);
}

.navbar.scrolled {
    background: var(--navbar-bg);
    box-shadow: var(--shadow-md);
}

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

.nav-logo h2 {
    color: var(--primary-color);
    font-weight: 700;
    font-size: var(--font-size-2xl);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-2xl);
}

.nav-link {
    color: var(--text-primary);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-fast);
}

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

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

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

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

.nav-toggle .bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-color) 0%, var(--surface-color) 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.hero-shape {
    position: absolute;
    border-radius: var(--radius-full);
    background: var(--primary-color);
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.hero-shape.shape-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    right: 10%;
    animation-delay: 0s;
}

.hero-shape.shape-2 {
    width: 200px;
    height: 200px;
    bottom: 20%;
    left: 10%;
    animation-delay: 2s;
}

.hero-shape.shape-3 {
    width: 100px;
    height: 100px;
    top: 50%;
    left: 50%;
    animation-delay: 4s;
}

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

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-avatar {
    margin-bottom: var(--spacing-1xl);
    position: relative;
    display: inline-block;
}

.avatar-img {
    width: 180px;
    height: 180px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 4px solid var(--primary-color);
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 1s ease-out;
}

.avatar-ring {
    position: absolute;
    top: -10px;
    left: -10px;
    width: 200px;
    height: 200px;
    border-radius: var(--radius-full);
    border: 2px solid var(--primary-color);
    opacity: 0.3;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.05); opacity: 0.1; }
    100% { transform: scale(1); opacity: 0.3; }
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-1xl);
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
    margin-top: var(--spacing-1xl);
    font-weight: 600;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.8;
    font-weight: 500;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease-out 0.6s both;
}

.hero-contact-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 1s ease-out 0.8s both;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

.contact-item i {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
}

.contact-item a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 1s ease-out 1s both;
}

.hero-social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    animation: fadeInUp 1s ease-out 1.2s both;
}

.social-link {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    font-size: var(--font-size-xl);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

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

.scroll-arrow {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
/* Skills Section */
.skills {
    background: var(--bg-color);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.skill-category {
    background: var(--card-bg);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

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

.category-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    display: center;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md); /* Increased gap for better spacing */
}

.category-title i {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    margin-right: 4px; /* Optional extra spacing */
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.skill-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.skill-name {
    font-weight: 500;
    color: var(--text-primary);
}

.skill-level {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 600;
}

.skill-bar {
    height: 8px;
    background: var(--surface-color);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-full);
    width: 0%;
    transition: width 1.5s ease-in-out;
    position: relative;
}

.skill-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

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

.additional-skills {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-2xl);
}

.skill-section {
    background: var(--card-bg);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.skill-tag {
    background: var(--surface-color);
    color: var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border: 1px solid var(--primary-color);
    transition: all var(--transition-fast);
}

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

.language-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.language-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
}

.language-item:last-child {
    border-bottom: none;
}

.language-name {
    font-weight: 500;
    color: var(--text-primary);
}

.language-level {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    background: var(--surface-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}
/* Projects Section */
.projects {
    background: var(--surface-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-2xl);
}

.project-card {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    position: relative;
}

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

.project-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

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

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
    text-align: center;
}

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

.btn-view-project {
    background-color: var(--primary-color);
    color: white;
    padding: 0.75em 1.5em;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-view-project:hover {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    transform: translateY(-2px);
}

.project-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    z-index: 1;
}

.project-content {
    padding: var(--spacing-xl);
}

.project-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.project-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
}

.project-role,
.project-date {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
}

.project-role {
    color: var(--primary-color);
    font-weight: 500;
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.project-technologies {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tech-tag {
    background: var(--surface-color);
    color: var(--primary-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border: 1px solid var(--primary-color);
}

.projects-view-all {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-xl);
}

/* Experience Section */
.experience {
    background: var(--bg-color);
}

.experience-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.tab-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--surface-color);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
}

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.timeline {
    position: relative;
    padding-left: var(--spacing-2xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-3xl);
}

.timeline-marker {
    position: absolute;
    left: -27px;
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: var(--radius-full);
    border: 4px solid var(--card-bg);
    box-shadow: 0 0 0 4px var(--border-color);
}

.timeline-content {
    background: var(--card-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(5px);
}

.timeline-header {
    margin-bottom: var(--spacing-md);
}

.position-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.company-name {
    font-size: var(--font-size-lg);
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.timeline-date {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.timeline-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.timeline-achievements {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

.timeline-achievements li {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.timeline-skills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-2xl);
}

.education-card {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    background: var(--card-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

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

.education-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.education-icon i {
    font-size: var(--font-size-xl);
    color: white;
}

.degree-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.institution-name {
    font-size: var(--font-size-base);
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.education-duration,
.education-grade {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.education-description {
    color: var(--text-secondary);
    line-height: 1.5;
    margin: var(--spacing-sm) 0;
}

.education-subjects,
.subject-tag {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.subject-tag {
    background: var(--surface-color);
    color: var(--primary-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border: 1px solid var(--primary-color);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.certification-card {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    background: var(--card-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

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

.cert-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.cert-icon i {
    font-size: var(--font-size-lg);
    color: white;
}

.cert-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.cert-issuer {
    font-size: var(--font-size-sm);
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.cert-date {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.cert-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Contact Section */
.contact {
    background: var(--surface-color);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-title {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.contact-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-2xl);
}

.contact-items {
    margin-bottom: var(--spacing-2xl);
}

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

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: var(--font-size-xl);
    color: white;
}

.contact-details h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.contact-details a,
.contact-details span {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.contact-social {
    margin-top: var(--spacing-xl);
}

.contact-social h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

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

.contact-form-container {
    background: var(--card-bg);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
    font-family: inherit;
    background: var(--bg-color);
    color: var(--text-primary);
}

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

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

/* Footer */
.footer {
    background: #f8f9fa;
    border-top: 1px solid #e9ecef;
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    min-height: 60px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.footer-logo {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.025em;
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: #6c757d;
    margin: 0;
    font-weight: 400;
}

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

.footer-social .social-link {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6c757d;
    background: transparent;
    border: none;
    border-radius: 6px;
    transition: all var(--transition-fast);
    text-decoration: none;
    font-size: 16px;
}

.footer-social .social-link:hover {
    color: var(--text-primary);
    background: #e9ecef;
    transform: translateY(-1px);
}

.footer-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.footer-link {
    color: #6c757d;
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 400;
    transition: color var(--transition-fast);
    white-space: nowrap;
}

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

.back-to-top {
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .footer-nav {
        gap: var(--spacing-md);
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .footer-brand {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .footer-nav {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .footer-social {
        gap: var(--spacing-sm);
    }
}

/* Scroll to Top Button */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xl);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.scroll-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--navbar-bg);
        width: 100%;
        text-align: center;
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-lg) 0;
        gap: var(--spacing-lg);
        backdrop-filter: blur(10px);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-xl);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-contact-info {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .additional-skills {
        grid-template-columns: 1fr;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .education-grid {
        grid-template-columns: 1fr;
    }

    .certifications-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .timeline {
        padding-left: var(--spacing-lg);
    }

    .timeline-marker {
        left: -20px;
    }

    .experience-tabs {
        flex-direction: column;
        align-items: center;
    }

    .tab-button {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .avatar-img {
        margin-top: var(--spacing-3xl);
        width: 150px;
        height: 150px;
    }

    .avatar-ring {
        margin-top: var(--spacing-3xl);
        width: 170px;
        height: 170px;
        top: -10px;
        left: -10px;
    }

    .projects-view-all {
        margin-top: var(--spacing-lg);
        padding: 0 var(--spacing-md);
    }

    .projects-view-all .btn {
        width: 100%;
        text-align: center;
        justify-content: center;
        padding: 0.75em 1em;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .section {
        padding: var(--spacing-3xl) 0;
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .about-card {
        padding: var(--spacing-lg);
    }

    .skill-category {
        padding: var(--spacing-lg);
    }

    .project-card {
        margin: 0 var(--spacing-sm);
    }

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

    .contact-form-container {
        padding: var(--spacing-lg);
    }

    .education-card {
        flex-direction: column;
        text-align: center;
    }

    .certification-card {
        flex-direction: column;
        text-align: center;
    }

    .contact-item {
        flex-direction: column;
        text-align: center;
    }

    .scroll-top {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
    }

     .projects-view-all {
        margin-top: var(--spacing-md);
    }

    .projects-view-all .btn {
        font-size: 0.95rem;
        padding: 0.65em 1em;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

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

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all var(--transition-slow);
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all var(--transition-slow);
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Print Styles */
@media print {
    .navbar,
    .scroll-top,
    .hero-buttons,
    .hero-social,
    .contact-form-container {
        display: none;
    }

    .section {
        padding: var(--spacing-lg) 0;
    }

    .hero {
        min-height: 0;
        padding: var(--spacing-lg) 0;
    }

    body {
        font-size: 12pt;
        line-height: 1.4;
    }

    h1, h2, h3 {
        page-break-after: avoid;
    }

    .project-card,
    .about-card,
    .timeline-item {
        page-break-inside: avoid;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --shadow-color: rgba(0, 0, 0, 0.5);
        --border-color: #000000;
    }

    body.dark-mode {
        --shadow-color: rgba(255, 255, 255, 0.3);
        --border-color: #ffffff;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}