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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --tertiary-color: #ec4899;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-card: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(99, 102, 241, 0.25);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Animated background gradient */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
    animation: gradientShift 20s ease infinite;
    z-index: -1;
    pointer-events: none;
}

@keyframes gradientShift {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    33% {
        transform: translate(30px, -30px) rotate(120deg);
    }
    66% {
        transform: translate(-30px, 30px) rotate(240deg);
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 96px 0;
}

#projects.section {
    padding: 96px 0 80px;
    overflow: hidden;
}

#contact.section {
    padding: 64px 0;
}

#contact .section-title {
    margin-bottom: 32px;
}

.section-alt {
    background-color: var(--bg-secondary);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 64px;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
    width: 100%;
    opacity: 1;
    transform: translateY(0);
    transition: var(--transition);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
    opacity: 0;
    transition: var(--transition);
}

.section-title.animate {
    opacity: 1;
    transform: translateY(0);
    animation: fadeInDown 0.6s ease-out;
}

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

.section-title.animate::after {
    opacity: 1;
    width: 120px;
    animation: expandLine 0.8s ease-out;
}

@keyframes expandLine {
    from {
        width: 0;
    }
    to {
        width: 120px;
    }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    transform: translateY(0);
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
    padding: 12px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px 0 48px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.nav-logo {
    margin-right: auto;
    padding-right: 32px;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientFlow 3s ease infinite;
    transition: var(--transition);
    display: inline-block;
}

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

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 24px;
    align-items: center;
    margin: 0;
    padding: 0;
    flex: 1;
    justify-content: center;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
    margin-left: 24px;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
    padding: 4px 0;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
    transform: translateX(-50%);
    border-radius: 2px;
}

.nav-link::after {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    width: 0;
    height: 100%;
    background: rgba(99, 102, 241, 0.05);
    transition: var(--transition);
    transform: translateX(-50%);
    border-radius: 4px;
    z-index: -1;
}

.nav-link:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

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

.nav-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 4px;
    border-radius: 4px;
}

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

.nav-link.active::before {
    width: 100%;
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    gap: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition);
}

/* Navbar CTA Button */
.nav-cta {
    padding: 10px 24px;
    font-size: 0.95rem;
    white-space: nowrap;
}

@media (max-width: 768px) {
    .nav-cta {
        padding: 8px 16px;
        font-size: 0.875rem;
    }
}

.nav-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 4px;
    border-radius: 4px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 24px 80px;
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
    overflow: hidden;
}

/* Floating particles background */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20% 30%, rgba(99, 102, 241, 0.15), transparent),
        radial-gradient(2px 2px at 60% 70%, rgba(139, 92, 246, 0.15), transparent),
        radial-gradient(1px 1px at 50% 50%, rgba(99, 102, 241, 0.2), transparent),
        radial-gradient(1px 1px at 80% 10%, rgba(139, 92, 246, 0.15), transparent),
        radial-gradient(2px 2px at 90% 80%, rgba(99, 102, 241, 0.1), transparent);
    background-size: 200% 200%;
    animation: particleFloat 20s ease infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes particleFloat {
    0%, 100% {
        background-position: 0% 0%, 100% 100%, 50% 50%, 80% 10%, 90% 80%;
    }
    50% {
        background-position: 100% 100%, 0% 0%, 50% 50%, 20% 90%, 10% 20%;
    }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    min-height: calc(100vh - 200px);
}

.hero-grid > * {
    align-self: center;
}

.hero-content {
    text-align: left;
    padding-left: 0;
    padding-right: 0;
    margin-left: 0;
    margin-right: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-self: center;
    animation: fadeInLeft 1s ease-out;
}

.hero-image-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease-out;
}

.hero-image {
    width: 100%;
    max-width: 400px;
    height: auto;
    aspect-ratio: 1;
    border-radius: 50%;
    object-fit: cover;
    border: 6px solid var(--bg-card);
    box-shadow: var(--shadow-2xl);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 6px;
    transition: var(--transition);
    position: relative;
    animation: float 6s ease-in-out infinite;
}

.hero-image::before {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
    filter: blur(20px);
}

.hero-image:hover {
    transform: scale(1.05) rotate(5deg);
    box-shadow: 0 25px 50px -12px rgba(99, 102, 241, 0.4);
}

.hero-image:hover::before {
    opacity: 0.5;
}

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

@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);
    }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 24px;
    margin-left: 0;
    margin-right: 0;
    padding-left: 0;
    padding-right: 0;
    line-height: 1.2;
    text-align: left;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientFlow 3s ease infinite, fadeInUp 1s ease-out 0.2s both;
    display: inline-block;
    position: relative;
    margin-left: 0;
    padding-left: 0;
}

.gradient-text::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transform-origin: left;
    animation: underlineExpand 1s ease-out 1.2s forwards;
}

@keyframes underlineExpand {
    to {
        transform: scaleX(1);
    }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: 0;
    margin-right: auto;
    padding-left: 0;
    padding-right: 0;
    line-height: 1.6;
    text-align: left;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.typing-cursor {
    display: inline-block;
    width: 3px;
    height: 1.25rem;
    background: var(--primary-color);
    margin-left: 2px;
    animation: blink 1s infinite;
    vertical-align: baseline;
}

@keyframes blink {
    0%, 50% {
        opacity: 1;
    }
    51%, 100% {
        opacity: 0;
    }
}

.hero-subtitle strong {
    color: var(--primary-color);
    font-weight: 600;
}

.hero-tagline {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 40px;
    max-width: 100%;
    text-align: left;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: flex-start;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.btn {
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-size: 200% 200%;
    color: white;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    animation: gradientFlow 2s ease infinite;
}

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

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

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
    z-index: -1;
}

.btn-secondary:hover {
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

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

.hero-social {
    display: flex;
    gap: 24px;
    justify-content: flex-start;
}

.social-link {
    color: var(--text-secondary);
    transition: var(--transition);
    padding: 12px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.social-link::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.social-link:hover {
    color: white;
    transform: translateY(-4px) scale(1.1);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.social-link svg {
    transition: var(--transition);
}

.social-link:hover svg {
    transform: rotate(360deg) scale(1.1);
}

.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    font-size: 0.875rem;
    animation: bounce 2s infinite;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.scroll-indicator.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

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

/* Education Section */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.education-card {
    background-color: var(--bg-card);
    padding: 20px 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    opacity: 1;
    transform: translateY(0);
}

.education-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.05), transparent);
    transition: var(--transition-slow);
}

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

.education-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.education-card.animate {
    opacity: 1;
    transform: translateY(0);
    animation: fadeInUp 0.6s ease-out;
}

.education-logo {
    width: 60px;
    height: 60px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-secondary);
    border-radius: 10px;
    padding: 10px;
    border: 1px solid var(--border-color);
}

.education-logo .logo-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: grayscale(100%);
    transition: var(--transition);
}

.education-card:hover .education-logo .logo-img {
    filter: grayscale(0%);
}

.education-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 8px;
}

.education-degree {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.education-year {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.875rem;
    padding: 4px 12px;
    background-color: rgba(99, 102, 241, 0.1);
    border-radius: 20px;
}

.education-institution {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.education-location {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 12px;
}

.education-details {
    color: var(--text-secondary);
    line-height: 1.8;
}

.education-gpa {
    margin-top: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Experience Section */
.experience-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 32px;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
}

.timeline-item {
    position: relative;
    margin-bottom: 32px;
}

.timeline-marker {
    position: absolute;
    left: -40px;
    top: 0;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: 3px solid var(--bg-secondary);
    box-shadow: var(--shadow-md);
}

.timeline-content {
    background-color: var(--bg-card);
    padding: 20px 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    opacity: 1 !important;
    transform: translateX(0) !important;
    visibility: visible !important;
    display: block;
    z-index: 1;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

.timeline-content:hover::before {
    height: 100%;
}

.timeline-content:hover {
    transform: translateX(12px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.timeline-content.animate {
    opacity: 1;
    transform: translateX(0);
}

@media (max-width: 768px) {
    .timeline-content:hover {
        transform: translateX(4px);
    }
}

.experience-logo {
    width: 50px;
    height: 50px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    padding: 6px;
    border: 1px solid var(--border-color);
}

.experience-logo .logo-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: grayscale(100%);
    transition: var(--transition);
}

.timeline-content:hover .experience-logo .logo-img {
    filter: grayscale(0%);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
    flex-wrap: wrap;
    gap: 8px;
}

.experience-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.experience-date {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.875rem;
    padding: 4px 12px;
    background-color: rgba(99, 102, 241, 0.1);
    border-radius: 20px;
}

.experience-company {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.experience-location {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 12px;
    font-style: italic;
}

.experience-description {
    list-style: none;
    padding: 0;
}

.experience-description li {
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

.experience-description li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Projects Section */
/* Projects Carousel */
.projects-carousel-wrapper {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 80px 20px;
}

.projects-carousel {
    overflow: hidden;
    position: relative;
    width: 100%;
    padding: 20px 0;
}

.projects-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    gap: 24px;
    will-change: transform;
    padding: 0 8px;
}

.projects-track .project-card {
    flex: 0 0 calc((100% - 48px) / 3);
    min-width: 0;
    max-width: none;
}

@media (max-width: 1024px) {
    .projects-track .project-card {
        flex: 0 0 calc((100% - 24px) / 2);
    }
    
    .projects-carousel-wrapper {
        padding: 0 70px;
    }
}

@media (max-width: 768px) {
    .projects-track .project-card {
        flex: 0 0 100%;
    }
    
    .projects-carousel-wrapper {
        padding: 0 60px;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
    }
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    z-index: 20;
    box-shadow: var(--shadow-md);
    color: var(--text-primary);
    opacity: 1;
    visibility: visible;
}

.carousel-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-50%) scale(1.1);
    box-shadow: var(--shadow-lg);
}

.carousel-btn:active {
    transform: translateY(-50%) scale(0.95);
}

.carousel-btn-prev {
    left: 10px;
}

.carousel-btn-next {
    right: 10px;
}

@media (max-width: 768px) {
    .carousel-btn-prev {
        left: 5px;
    }
    
    .carousel-btn-next {
        right: 5px;
    }
}

.carousel-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-top: 32px;
    flex-wrap: wrap;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-color);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
    opacity: 0.5;
}

.carousel-dot:hover {
    background: var(--primary-color);
    opacity: 0.8;
    transform: scale(1.3);
    border-color: var(--primary-color);
}

.carousel-dot.active {
    background: var(--primary-color);
    width: 9px;
    height: 9px;
    border-radius: 50%;
    opacity: 1;
    border-color: var(--primary-color);
    transform: scale(1.15);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.project-card {
    background-color: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: relative;
    opacity: 1;
    transform: translateY(0) scale(1);
}

.project-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
}

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

.project-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--shadow-2xl);
    border-color: var(--primary-color);
}

.project-card.animate {
    opacity: 1;
    transform: translateY(0) scale(1);
    animation: fadeInScale 0.6s ease-out;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.project-image {
    width: 100%;
    height: 170px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-size: 200% 200%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    animation: gradientFlow 5s ease infinite;
}

.project-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: var(--transition-slow);
}

.project-card:hover .project-image::before {
    transform: translateX(100%);
}

.project-placeholder {
    color: white;
    opacity: 0.8;
}

.project-content {
    padding: 17px 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 6px;
    flex-wrap: wrap;
}

.project-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
    min-width: 200px;
    line-height: 1.3;
}

.project-date {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.8rem;
    padding: 3px 10px;
    background-color: rgba(99, 102, 241, 0.1);
    border-radius: 20px;
    white-space: nowrap;
    flex-shrink: 0;
}

.project-organization {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 8px;
    font-style: italic;
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 12px;
    flex-grow: 1;
    font-size: 0.9rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 0;
}

.tag {
    padding: 6px 12px;
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.project-links {
    display: flex;
    gap: 16px;
}

.project-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

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

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

.project-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Skills Section */
.skills-container {
    max-width: 900px;
    margin: 0 auto;
}

.skill-category {
    margin-bottom: 48px;
}

.skill-category:last-child {
    margin-bottom: 0;
}

.skill-category-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
    text-align: center;
}

.skills-icons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 24px;
    justify-items: center;
}

.skill-icon-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 20px;
    background-color: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    width: 100%;
    max-width: 140px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

.skill-icon-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: var(--transition);
    z-index: 0;
}

.skill-icon-item:hover {
    transform: translateY(-8px) scale(1.05) rotate(0deg);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
    color: white;
}

.skill-icon-item:hover::before {
    opacity: 0.1;
}

.skill-icon {
    width: 64px;
    height: 64px;
    object-fit: contain;
    transition: var(--transition);
    position: relative;
    z-index: 1;
    filter: grayscale(30%);
}

.skill-icon-item:hover .skill-icon {
    transform: scale(1.2) rotate(360deg);
    filter: grayscale(0%);
}

.skill-icon-name {
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.skill-icon-item:hover .skill-icon-name {
    color: var(--primary-color);
    font-weight: 700;
}

.skill-icon-item.animate {
    opacity: 1;
    transform: scale(1) rotate(0deg);
    animation: scaleIn 0.4s ease-out;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8) rotate(-5deg);
    }
    to {
        opacity: 1;
        transform: scale(1) rotate(0deg);
    }
}

.skill-icon-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
    text-align: center;
}

.logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.skills-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.skill-tag {
    padding: 10px 20px;
    background-color: var(--bg-card);
    color: var(--text-primary);
    border-radius: 8px;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.skill-tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Certifications Section */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.certification-card {
    background-color: var(--bg-card);
    padding: 20px 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.certification-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.certification-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    color: white;
    margin-bottom: 16px;
}

.certification-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.certification-issuer {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.certification-date {
    display: inline-block;
    padding: 4px 12px;
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.certification-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

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

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

.certification-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Contact Section */
.contact-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.contact-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.contact-buttons-row {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    align-items: center;
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.contact-links {
    display: flex;
    flex-direction: row;
    gap: 16px;
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    background-color: var(--bg-card);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    opacity: 1;
    transform: translateY(0);
    flex: 0 1 auto;
    min-width: 140px;
}

.contact-link-email {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.contact-link-email:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.contact-link-linkedin {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.contact-link-linkedin:hover {
    background-color: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

.contact-link-resume {
    border-color: var(--tertiary-color);
    color: var(--tertiary-color);
}

.contact-link-resume:hover {
    background-color: var(--tertiary-color);
    color: white;
    border-color: var(--tertiary-color);
}

.contact-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    transition: var(--transition);
    border-radius: 50%;
}

.contact-link:hover::before {
    width: 300px;
    height: 300px;
}

.contact-link:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.contact-link svg {
    transition: var(--transition);
}

.contact-link:hover svg {
    transform: scale(1.2) rotate(5deg);
}

.contact-link.animate {
    opacity: 1;
    transform: translateY(0);
    animation: fadeInUp 0.5s ease-out;
}

.contact-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: 8px;
}

.contact-link svg {
    flex-shrink: 0;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.back-to-top:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.back-to-top:active {
    transform: translateY(-2px);
}

/* Scroll Progress Indicator */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    z-index: 9999;
    transition: width 0.1s ease-out;
    box-shadow: 0 2px 4px rgba(99, 102, 241, 0.3);
}

/* Footer */
.footer {
    background-color: var(--text-primary);
    color: white;
    text-align: center;
    padding: 32px 0;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
}

.footer .container {
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 24px;
        gap: 16px;
    }

    .nav-logo {
        padding-right: 0;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
        padding: 32px 0;
        gap: 16px;
        max-width: none;
        margin-left: 0;
        margin-right: 0;
    }

    .nav-actions {
        margin-left: 0;
    }

    .nav-cta {
        display: none;
    }

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

    .nav-toggle {
        display: flex;
    }

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

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }

    .hero-content {
        text-align: center;
        order: 2;
    }

    .hero-image-wrapper {
        order: 1;
    }

    .hero-image {
        width: 200px;
        max-width: 200px;
    }

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

    .hero-subtitle {
        font-size: 1.125rem;
        text-align: center;
    }

    .hero-tagline {
        font-size: 1rem;
        text-align: center;
    }

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

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

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

    .skills-icons-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 16px;
    }

    .skill-icon-item {
        padding: 16px;
        max-width: 120px;
    }

    .skill-icon {
        width: 48px;
        height: 48px;
    }

    .section {
        padding: 64px 0;
    }

    .section-title {
        font-size: 2rem;
        margin-bottom: 48px;
    }

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

    .experience-timeline {
        padding-left: 24px;
    }

    .timeline-content:hover {
        transform: translateX(4px);
    }

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

    .projects-carousel-wrapper {
        padding: 0 20px;
    }

    .project-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .project-date {
        align-self: flex-start;
    }

    .project-title {
        min-width: auto;
    }

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

    .btn {
        text-align: center;
        min-height: 44px;
        min-width: 44px;
    }

    .back-to-top {
        bottom: 24px;
        right: 24px;
        width: 44px;
        height: 44px;
    }

    .social-link,
    .contact-link {
        min-height: 44px;
        min-width: 44px;
    }

    .contact-buttons-row {
        flex-direction: column;
        gap: 12px;
    }

    .btn-large {
        width: 100%;
        max-width: 300px;
    }

    .contact-link {
        width: 100%;
        max-width: 300px;
    }

    #contact.section {
        padding: 48px 0;
    }

    .contact-description {
        margin-bottom: 20px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 100px 16px 60px;
    }

    .hero-grid {
        gap: 32px;
    }

    .hero-image {
        width: 180px;
        max-width: 180px;
    }

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

    .hero-subtitle,
    .hero-tagline {
        text-align: center;
    }

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

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

    .skills-icons-grid {
        grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
        gap: 12px;
    }

    .skill-icon-item {
        padding: 12px;
        max-width: 100px;
    }

    .skill-icon {
        width: 40px;
        height: 40px;
    }

    .education-logo,
    .experience-logo {
        width: 60px;
        height: 60px;
    }

    .education-card,
    .timeline-content,
    .project-content {
        padding: 24px;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .back-to-top {
        bottom: 16px;
        right: 16px;
        width: 40px;
        height: 40px;
    }
}

/* Focus visible for keyboard navigation only */
*:focus:not(:focus-visible) {
    outline: none;
}

*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Improve touch targets */
a, button {
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Skip to content link for accessibility */
.skip-to-content {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: 12px 24px;
    text-decoration: none;
    z-index: 10000;
    border-radius: 0 0 8px 0;
}

.skip-to-content:focus {
    top: 0;
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

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