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

:root {
    /* Microsoft Design System Colors */
    --primary-blue: #0078d4;
    --primary-blue-dark: #106ebe;
    --secondary-blue: #00bcf2;
    --accent-orange: #ff8c00;
    --dark-gray: #323130;
    --medium-gray: #605e5c;
    --light-gray: #f3f2f1;
    --white: #ffffff;
    --black: #000000;
    
    /* Gradient Colors */
    --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--primary-blue-dark) 0%, var(--primary-blue) 100%);
    
    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, 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;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* 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);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
    scroll-behavior: smooth;
}

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

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
}

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

.nav-logo h1 {
    color: var(--primary-blue);
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin: 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
}

.nav-item {
    margin-left: var(--spacing-lg);
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--dark-gray);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 var(--spacing-2xl);
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--medium-gray);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--medium-gray);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-badges {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.badge i {
    font-size: var(--font-size-xl);
}

.mvp-badge i {
    color: var(--accent-orange);
}

.location-badge i {
    color: var(--primary-blue);
}

.badge-title {
    display: block;
    font-weight: 600;
    color: var(--dark-gray);
}

.badge-subtitle {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--medium-gray);
}

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

.profile-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    text-align: center;
}

.profile-image {
    width: 200px;
    height: 200px;
    margin: 0 auto var(--spacing-lg);
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--primary-blue);
    position: relative;
}

.profile-image::after {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    border-radius: 50%;
    background: var(--gradient-primary);
    z-index: -1;
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-stats {
    display: flex;
    justify-content: space-around;
    gap: var(--spacing-md);
}

.stat {
    text-align: center;
}

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

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--medium-gray);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: var(--font-size-base);
}

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

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

.btn-secondary {
    background: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

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

/* Sections */
section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    color: var(--dark-gray);
    position: relative;
}

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

/* About Section */
.about {
    background: var(--light-gray);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.about-intro {
    font-size: var(--font-size-lg);
    color: var(--medium-gray);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.highlight-item {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

.highlight-item:hover {
    transform: translateY(-5px);
}

.highlight-item i {
    font-size: var(--font-size-3xl);
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
}

.highlight-item h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--dark-gray);
}

.highlight-item p {
    color: var(--medium-gray);
    line-height: 1.6;
}

/* Charity Section */
.charity-section {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-2xl);
    border-top: 2px solid #e5e5e5;
}

.charity-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.charity-title i {
    color: #e74c3c;
    font-size: var(--font-size-xl);
}

.charity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.charity-item {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    text-align: left;
    border-left: 4px solid transparent;
}

.charity-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-left-color: #e74c3c;
}

.charity-item:nth-child(1) {
    border-left-color: #3498db;
}

.charity-item:nth-child(1):hover {
    border-left-color: #2980b9;
}

.charity-item:nth-child(2) {
    border-left-color: #e74c3c;
}

.charity-item:nth-child(2):hover {
    border-left-color: #c0392b;
}

.charity-item:nth-child(3) {
    border-left-color: #27ae60;
}

.charity-item:nth-child(3):hover {
    border-left-color: #229954;
}

.charity-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #ff6b6b, #feca57);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-lg);
    flex-shrink: 0;
    position: relative;
}

.charity-item:nth-child(1) .charity-icon {
    background: linear-gradient(135deg, #3498db, #5dade2);
}

.charity-item:nth-child(2) .charity-icon {
    background: linear-gradient(135deg, #e74c3c, #ec7063);
}

.charity-item:nth-child(3) .charity-icon {
    background: linear-gradient(135deg, #27ae60, #58d68d);
}

.charity-content h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-xs);
}

.charity-content p {
    color: var(--medium-gray);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

.charity-quote {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    position: relative;
    margin-top: var(--spacing-lg);
}

.charity-quote::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: var(--spacing-lg);
    font-size: 4rem;
    color: #e74c3c;
    font-family: Georgia, serif;
    line-height: 1;
}

.charity-quote blockquote {
    font-style: italic;
    font-size: var(--font-size-lg);
    color: var(--medium-gray);
    line-height: 1.7;
    margin: 0;
    padding-left: var(--spacing-lg);
}

/* Charity section animations */
@keyframes heartbeat {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.charity-title i {
    animation: heartbeat 2s ease-in-out infinite;
}

.charity-icon {
    transition: all 0.3s ease;
}

.charity-item:hover .charity-icon {
    transform: scale(1.1) rotate(5deg);
}

/* Expertise Section */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

/* Projects Section */
.projects {
    background: var(--white);
}

.projects-search {
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

.search-input-container {
    position: relative;
    max-width: 400px;
    width: 100%;
}

.search-input {
    width: 100%;
    padding: 12px 40px 12px 40px;
    border: 2px solid #e5e5e5;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    transition: all 0.3s ease;
    background: var(--white);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.1);
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--medium-gray);
    font-size: var(--font-size-sm);
}

.clear-search {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--medium-gray);
    cursor: pointer;
    padding: 4px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.clear-search:hover {
    color: var(--primary-blue);
    background: var(--light-gray);
}

.projects-filter {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--light-gray);
    color: var(--medium-gray);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-primary);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.project-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid #e5e5e5;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.project-card:hover::before {
    transform: translateX(0);
}

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

.project-card.featured {
    border: 2px solid var(--primary-blue);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
}

.project-card.featured::before {
    height: 6px;
    background: var(--gradient-secondary);
}

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

.project-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-2xl);
    flex-shrink: 0;
}

.project-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: flex-end;
}

.stars,
.forks {
    font-size: var(--font-size-sm);
    color: var(--medium-gray);
    background: var(--light-gray);
    padding: 2px 6px;
    border-radius: var(--radius-md);
}

.language-tag {
    font-size: var(--font-size-xs);
    padding: 2px 8px;
    border-radius: var(--radius-md);
    font-weight: 500;
    color: var(--white);
}

.language-tag.csharp {
    background: #239120;
}

.language-tag.typescript {
    background: #3178c6;
}

.language-tag.batch {
    background: #c1f12e;
    color: var(--dark-gray);
}

.language-tag.powershell {
    background: #012456;
}

.language-tag.mit {
    background: var(--accent-orange);
}

.language-tag.dotnet {
    background: #512bd4;
}

.github-link {
    color: var(--dark-gray);
    font-size: var(--font-size-lg);
    transition: color 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--light-gray);
}

.github-link:hover {
    color: var(--primary-blue);
    background: var(--white);
    box-shadow: var(--shadow-md);
}

.project-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.project-description {
    color: var(--medium-gray);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-base);
}

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

.tag {
    background: rgba(0, 120, 212, 0.1);
    color: var(--primary-blue);
    padding: 2px 8px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border: 1px solid rgba(0, 120, 212, 0.2);
}

.project-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid #f0f0f0;
}

.update-time {
    font-size: var(--font-size-xs);
    color: var(--medium-gray);
}

.projects-cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.projects-cta .btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Project card animation states */
.project-card.fade-out {
    opacity: 0;
    transform: scale(0.95);
    transition: all 0.3s ease;
}

.project-card.fade-in {
    opacity: 1;
    transform: scale(1);
    transition: all 0.3s ease;
}

/* Featured project pulse animation */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 120, 212, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(0, 120, 212, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 120, 212, 0);
    }
}

.project-card.featured:hover {
    animation: pulse 2s infinite;
}

.expertise-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border-left: 4px solid var(--primary-blue);
}

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

.card-icon {
    font-size: var(--font-size-3xl);
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
}

.expertise-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--dark-gray);
}

.expertise-card p {
    color: var(--medium-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

/* Blog Section */
.blog {
    background: var(--light-gray);
}

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

.blog-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

.blog-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.blog-category {
    background: var(--gradient-primary);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.blog-date {
    color: var(--medium-gray);
    font-size: var(--font-size-sm);
}

.blog-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--dark-gray);
}

.blog-excerpt {
    color: var(--medium-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.blog-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.blog-link:hover {
    color: var(--primary-blue-dark);
}

.blog-cta {
    text-align: center;
}

/* Certifications Section */
.certifications {
    background: var(--white);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.cert-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid #e5e5e5;
    transition: all 0.3s ease;
}

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

.cert-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

.cert-info h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-xs);
}

.cert-info p {
    color: var(--medium-gray);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

.cert-year {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 2px 8px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* Contact Section */
.contact {
    background: var(--light-gray);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-md);
    transition: all 0.3s ease;
}

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

.contact-item i {
    font-size: var(--font-size-2xl);
    color: var(--primary-blue);
    width: 40px;
    text-align: center;
}

.contact-item h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-xs);
}

.contact-item a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Footer */
footer {
    background: var(--dark-gray);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.footer-info h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.footer-info p {
    color: #b3b3b3;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: #b3b3b3;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid #444;
    color: #b3b3b3;
}

.footer-bottom a {
    color: var(--primary-blue);
    text-decoration: none;
}

.footer-bottom a:hover {
    color: var(--secondary-blue);
}

/* Typing Animation */
@keyframes typing {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

.typing-text {
    display: inline-block;
    overflow: hidden;
    white-space: nowrap;
    animation: typing 3s steps(40, end);
}

/* Responsive Design */
@media screen and (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: var(--spacing-lg) 0;
    }

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

    .nav-item {
        margin: var(--spacing-sm) 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-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }

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

    .hero-badges {
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .profile-card {
        max-width: 300px;
        margin: 0 auto;
    }

    .profile-image {
        width: 150px;
        height: 150px;
    }

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

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

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

    .charity-quote {
        padding: var(--spacing-lg);
    }

    .charity-quote::before {
        left: 50%;
        transform: translateX(-50%);
    }

    .charity-quote blockquote {
        padding-left: 0;
        font-size: var(--font-size-base);
    }

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

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

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

    .projects-filter {
        justify-content: center;
        gap: var(--spacing-xs);
    }

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

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

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

    .project-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: center;
        text-align: center;
    }

    .project-stats {
        justify-content: center;
    }

    .project-tags {
        justify-content: center;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

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

    .nav-container {
        padding: 0 var(--spacing-sm);
    }

    .hero-container {
        padding: 0 var(--spacing-sm);
    }

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

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

    .profile-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* Smooth scrolling for anchor links */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
.nav-link:focus,
.btn:focus,
.blog-link:focus,
.contact-item a:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .navbar,
    .nav-toggle,
    .hero-buttons,
    .blog-cta,
    footer {
        display: none;
    }

    .hero {
        padding-top: 0;
    }

    body {
        color: var(--black);
        background: var(--white);
    }
}