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

:root {
    /* Light Theme Colors */
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #1e293b;
    --accent-color: #06b6d4;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --border-color: #e2e8f0;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 10px 25px rgba(0, 0, 0, 0.15);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* Dark Theme Colors */
[data-theme="dark"] {
    --primary-color: #60a5fa;
    --primary-dark: #3b82f6;
    --secondary-color: #f1f5f9;
    --accent-color: #22d3ee;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-light: #94a3b8;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #334155;
    --border-color: #475569;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-heavy: 0 10px 25px rgba(0, 0, 0, 0.5);
}

html {
    scroll-behavior: smooth;
}

/* Enhanced smooth scrolling */
* {
    scroll-behavior: smooth;
}

/* Performance optimizations for animations */
* {
    will-change: auto;
}

.animate-in,
.project-card,
.skill-item,
.cert-item,
.timeline-item,
.interest-item {
    will-change: transform, opacity;
}

/* Professional Animation System */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

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

/* Section animations */
section {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

section.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered animations for content */
.animate-stagger > * {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-stagger > *:nth-child(1) { transition-delay: 0.1s; }
.animate-stagger > *:nth-child(2) { transition-delay: 0.2s; }
.animate-stagger > *:nth-child(3) { transition-delay: 0.3s; }
.animate-stagger > *:nth-child(4) { transition-delay: 0.4s; }
.animate-stagger > *:nth-child(5) { transition-delay: 0.5s; }
.animate-stagger > *:nth-child(6) { transition-delay: 0.6s; }

.animate-stagger.animate-in > * {
    opacity: 1;
    transform: translateY(0);
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: all 0.3s ease;
    opacity: 0;
    animation: fadeIn 0.8s ease-out forwards;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
}

[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.95);
    border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .nav-link {
    color: var(--text-primary);
}

[data-theme="dark"] .nav-link:hover {
    color: var(--primary-color);
}

[data-theme="dark"] .nav-menu.active {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    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: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
}

.theme-toggle {
    margin-left: 1rem;
}

.theme-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.theme-btn:hover {
    background: var(--bg-secondary);
    transform: rotate(180deg);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    padding-top: 70px;
    animation: fadeInUp 1s ease-out;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    animation: fadeInLeft 1s ease-out 0.3s both;
}

.hero-text {
    animation: fadeInLeft 1s ease-out 0.5s both;
}

.hero-image {
    animation: fadeInRight 1s ease-out 0.7s both;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

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

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    cursor: pointer;
    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 0.5s;
}

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

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-outline:hover {
    background: var(--bg-card);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Profile Card */
.profile-card {
    background: var(--bg-card);
    border-radius: 1rem;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-heavy);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.profile-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.profile-avatar {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0,0,0,0.18);
    border: 4px solid var(--bg-card);
    transition: all 0.3s ease;
    cursor: pointer;
}

.profile-avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 35px rgba(0,0,0,0.25);
    border-color: var(--primary-color);
}

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* Center face in circle */
    object-position: 50% 50%;
    transform: scale(1.1);
    transform-origin: center;
    display: block;
}

/* Responsive avatar sizing */
@media (max-width: 1024px) {
    .profile-avatar { width: 176px; height: 176px; }
}

@media (max-width: 768px) {
    .profile-avatar { width: 152px; height: 152px; }
}

@media (max-width: 480px) {
    .profile-avatar { width: 128px; height: 128px; }
}

.profile-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.profile-info p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Section Styles */
section {
    padding: 5rem 0;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    transition: all 0.3s ease;
    cursor: pointer;
}

.section-title:hover {
    color: var(--primary-color);
    transform: scale(1.05);
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* About Section */
.about {
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: start;
    position: relative;
    transition: all 0.4s ease;
}

.about-content::before {
    content: '';
    position: absolute;
    top: -50px;
    left: -50px;
    right: -50px;
    bottom: -50px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.6s ease;
    pointer-events: none;
    z-index: -1;
}

.about-content:hover::before {
    opacity: 1;
}

.about-content:hover {
    transform: translateY(-5px);
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
    transition: all 0.4s ease;
}

.about-content:hover .stats {
    transform: translateY(-8px);
}

.about-content:hover .stat-item {
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: left 0.6s ease;
}

.stat-item:hover::before {
    left: 100%;
}

.stat-item:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2), 0 0 20px rgba(59, 130, 246, 0.3);
    border-color: var(--primary-color);
}

.stat-item h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-item p {
    color: var(--text-secondary);
    font-weight: 500;
}

.about-skills-preview h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.skill-tag {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 1rem;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 500;
}

/* Skills Section */
.skills {
    background: var(--bg-primary);
}

.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.skill-category {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.skill-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: left 0.6s ease;
}

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

.skill-category:hover {
    transform: translateY(-15px) scale(1.03);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2), 0 0 30px rgba(59, 130, 246, 0.3);
    border-color: var(--primary-color);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(59, 130, 246, 0.05) 100%);
}

.skill-category h3 {
    margin-bottom: 2rem;
    color: var(--text-primary);
    font-size: 1.3rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.skill-category h3:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.skill-item {
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
    padding: 0.5rem;
    border-radius: 0.5rem;
    opacity: 0;
    transform: translateX(-20px);
    animation: fadeInLeft 0.6s ease-out forwards;
}

.skill-item:nth-child(1) { animation-delay: 0.1s; }
.skill-item:nth-child(2) { animation-delay: 0.2s; }
.skill-item:nth-child(3) { animation-delay: 0.3s; }
.skill-item:nth-child(4) { animation-delay: 0.4s; }
.skill-item:nth-child(5) { animation-delay: 0.5s; }

.skill-item:hover {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(59, 130, 246, 0.05) 100%);
    transform: translateX(12px) scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15), 0 0 15px rgba(59, 130, 246, 0.2);
    border-left: 4px solid var(--primary-color);
    border-radius: 0.5rem;
}

.skill-category:hover .skill-item {
    transform: translateX(5px);
    transition-delay: calc(var(--i) * 0.1s);
}

.skill-category:hover .skill-item:nth-child(1) { --i: 1; }
.skill-category:hover .skill-item:nth-child(2) { --i: 2; }
.skill-category:hover .skill-item:nth-child(3) { --i: 3; }
.skill-category:hover .skill-item:nth-child(4) { --i: 4; }
.skill-category:hover .skill-item:nth-child(5) { --i: 5; }

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.skill-info span:first-child {
    font-weight: 500;
    color: var(--text-primary);
}

.skill-info span:last-child {
    color: var(--text-secondary);
    font-weight: 600;
}

.skill-bar {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    width: 0;
    transition: width 1s ease-in-out;
}

/* Languages & Interests Section */
.languages {
    background: var(--bg-primary);
}

.languages-interests-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.languages-section h3,
.interests-section h3 {
    margin-bottom: 2rem;
    color: var(--text-primary);
    font-size: 1.5rem;
}

.language-items {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.language-item {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    cursor: pointer;
}

.language-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
    border-color: var(--primary-color);
}

.language-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.language-name {
    font-weight: 600;
    color: var(--text-primary);
}

.language-level {
    color: var(--text-secondary);
    font-weight: 500;
}

.language-bar {
    height: 6px;
    background: var(--bg-secondary);
    border-radius: 3px;
    overflow: hidden;
}

.language-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 3px;
    width: 0;
    transition: width 1s ease-in-out;
}

.interests-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.interest-item {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    opacity: 0;
    transform: translateY(30px);
    animation: slideInUp 0.8s ease-out forwards;
    position: relative;
    overflow: hidden;
}

.interest-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: left 0.6s ease;
}

.interest-item:hover::before {
    left: 100%;
}

.interest-item:nth-child(1) { animation-delay: 0.1s; }
.interest-item:nth-child(2) { animation-delay: 0.2s; }
.interest-item:nth-child(3) { animation-delay: 0.3s; }
.interest-item:nth-child(4) { animation-delay: 0.4s; }
.interest-item:nth-child(5) { animation-delay: 0.5s; }

.interest-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15), 0 0 15px rgba(59, 130, 246, 0.2);
    border-color: var(--primary-color);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(59, 130, 246, 0.03) 100%);
}

.interest-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.interest-item:hover i {
    transform: scale(1.1);
    color: var(--primary-dark);
}

.interest-item h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.interest-item:hover h4 {
    color: var(--primary-color);
    transform: translateY(-2px);
}

.interest-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    transition: all 0.3s ease;
}

.interest-item:hover p {
    color: var(--text-primary);
    transform: translateY(-1px);
}

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

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

.project-card {
    background: var(--bg-card);
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(30px);
    animation: slideInUp 0.8s ease-out forwards;
    position: relative;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: left 0.6s ease;
}

.project-card:hover::before {
    left: 100%;
}

.project-card:nth-child(1) { animation-delay: 0.1s; }
.project-card:nth-child(2) { animation-delay: 0.2s; }
.project-card:nth-child(3) { animation-delay: 0.3s; }

.project-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2), 0 0 20px rgba(59, 130, 246, 0.3);
    border-color: var(--primary-color);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(59, 130, 246, 0.05) 100%);
}

.project-image {
    height: 200px;
    background: var(--gradient-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 0.5rem 0.5rem 0 0;
}

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

.project-card:hover .project-img {
    transform: scale(1.05);
    filter: brightness(1.1) contrast(1.05);
}

.project-placeholder {
    font-size: 3rem;
    color: white;
}

.project-content {
    padding: 1.5rem;
    transition: all 0.4s ease;
    position: relative;
    z-index: 2;
}

.project-card:hover .project-content {
    transform: translateY(-3px);
}

.project-card:hover .project-content h3 {
    color: var(--primary-color);
    transform: translateX(5px);
}

.project-content h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-size: 1.3rem;
}

.project-date {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.project-card:hover .project-date {
    transform: translateX(3px);
    color: var(--primary-dark);
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
    transition: all 0.3s ease;
}

.project-card:hover .project-content p {
    transform: translateX(3px);
    color: var(--text-primary);
}

.project-features {
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.project-card:hover .project-features {
    transform: translateY(-3px);
}

.project-card:hover .project-features h4 {
    color: var(--primary-color);
    transform: translateX(3px);
}

.project-features h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
}

.project-features ul {
    list-style: none;
    padding: 0;
    margin: 0;
    transition: all 0.3s ease;
}

.project-card:hover .project-features ul {
    transform: translateY(-2px);
}

.project-card:hover .project-features li {
    transform: translateX(5px);
    color: var(--text-primary);
}

.project-features li {
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    padding-left: 1rem;
    position: relative;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.project-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tech-tag {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    border: 1px solid var(--border-color);
}

.project-links {
    display: flex;
    gap: 1rem;
    transition: all 0.3s ease;
}

.project-card:hover .project-links {
    transform: translateY(-3px);
}

.project-card:hover .project-links a {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Education Section */
.education-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto 3rem;
}

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

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-left: 5rem;
    opacity: 0;
    transform: translateX(-30px);
    animation: fadeInLeft 0.8s ease-out forwards;
}

.timeline-item:nth-child(1) { animation-delay: 0.1s; }
.timeline-item:nth-child(2) { animation-delay: 0.2s; }
.timeline-item:nth-child(3) { animation-delay: 0.3s; }

.timeline-marker {
    position: absolute;
    left: 1rem;
    top: 0.5rem;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: var(--primary-color);
    border: 3px solid var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    color: white;
    z-index: 2;
}

.timeline-content {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    cursor: pointer;
}

.timeline-item:hover .timeline-content {
    transform: translateX(10px) scale(1.02);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.timeline-item:hover .timeline-marker {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.timeline-content h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.timeline-location {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.timeline-duration {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.timeline-grade {
    color: var(--text-secondary);
    font-weight: 600;
}

.timeline-details {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.timeline-details p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    line-height: 1.5;
}

.timeline-details strong {
    color: var(--text-primary);
    font-weight: 600;
}

.certifications {
    text-align: center;
}

.certifications h3 {
    margin-bottom: 2rem;
    color: var(--text-primary);
    font-size: 1.5rem;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.cert-item {
    background: var(--bg-card);
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    opacity: 0;
    transform: translateY(30px);
    animation: slideInUp 0.8s ease-out forwards;
}

.cert-item:nth-child(1) { animation-delay: 0.1s; }
.cert-item:nth-child(2) { animation-delay: 0.2s; }
.cert-item:nth-child(3) { animation-delay: 0.3s; }

.cert-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.cert-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.cert-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.3s ease;
    transform: scale(0.95);
}

.cert-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

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

.cert-download {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.cert-download:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.cert-content {
    padding: 1.5rem;
}

.cert-content h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.cert-content p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.cert-desc {
    color: var(--text-light);
    font-size: 0.8rem;
    line-height: 1.4;
    display: block;
}

.achievements {
    margin-top: 3rem;
    text-align: center;
}

.achievements h3 {
    margin-bottom: 2rem;
    color: var(--text-primary);
    font-size: 1.5rem;
}

.achievement-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.achievement-item {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    text-align: center;
}

.achievement-item:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.achievement-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.achievement-item h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.achievement-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.achievement-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.4;
    display: block;
}

/* Contact Section */
.contact {
    background: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin throughout: 2rem;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

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

.contact-item p {
    color: var(--text-secondary);
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    transform: scale(1.02);
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-card);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-medium);
        border-top: 1px solid var(--border-color);
    }

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

    .nav-toggle {
        display: flex;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

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

    .languages-interests-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }

    .profile-card {
        padding: 1.5rem;
    }

    .profile-avatar {
        width: 100px;
        height: 100px;
        font-size: 2.5rem;
    }
}