/* Modern CSS Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS Custom Properties */
:root {
    /* Color Palette */
    --primary-color: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --secondary-color: #7c3aed;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Animations */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-800);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--gray-900);
}

p {
    margin-bottom: var(--space-sm);
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    color: var(--gray-900);
}

.logo {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
}

.brand-text {
    font-size: 1.25rem;
}

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

.nav-link {
    color: var(--gray-600);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: var(--space-xs) 0;
    position: relative;
    transition: var(--transition);
}

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

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

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

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--gray-700);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-3xl) 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 50%, var(--gray-50) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -25%;
    width: 100%;
    height: 200%;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(124, 58, 237, 0.05));
    border-radius: 50%;
    z-index: -1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-md);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.stat {
    text-align: center;
}

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

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--gray-700);
    border-color: var(--gray-300);
}

.btn-secondary:hover {
    background: var(--gray-100);
    border-color: var(--gray-400);
    transform: translateY(-2px);
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    flex-direction: column;
}

.floating-card {
    background: var(--white);
    padding: var(--space-md);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin: var(--space-md);
    animation: float 6s ease-in-out infinite;
}

.floating-card:nth-child(1) {
    animation-delay: 0s;
}

.floating-card:nth-child(2) {
    animation-delay: 2s;
}

.floating-card:nth-child(3) {
    animation-delay: 4s;
}

.floating-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.floating-card span {
    font-weight: 500;
    color: var(--gray-700);
}

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

/* Section Styles */
section {
    padding: var(--space-3xl) 0;
}

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

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

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

/* About Section */
.about-section {
    background: var(--white);
}

.about-intro {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.intro-text {
    font-size: 1.5rem;
    color: var(--gray-700);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
}

.about-story {
    display: grid;
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.story-item {
    display: flex;
    gap: var(--space-lg);
    align-items: flex-start;
    padding: var(--space-xl);
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    transition: var(--transition);
}

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

.story-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
}

.story-content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--gray-900);
}

.story-content p {
    color: var(--gray-600);
    line-height: 1.6;
}

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

.highlight-card {
    background: var(--white);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.highlight-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.highlight-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--space-md);
}

.highlight-card h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--gray-900);
}

.highlight-card p {
    color: var(--gray-600);
    font-size: 0.875rem;
}

/* Skills Section */
.skills-section {
    background: var(--gray-50);
}

/* Skills Panel */
.skills-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-2xl);
    margin-top: var(--space-2xl);
}

.skill-category {
    background: var(--white);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.skill-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.skill-category:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.category-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
    transition: var(--transition);
}

.skill-category:hover .category-icon {
    transform: scale(1.1) rotate(10deg);
    box-shadow: var(--shadow-lg);
}

.skill-category h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-xl);
    position: relative;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
}

.skill-tag {
    background: var(--gray-100);
    color: var(--gray-700);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: default;
}

.skill-tag:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.skill-tag:nth-child(odd):hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}

.skill-tag:nth-child(3n):hover {
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
}

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

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

.project-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

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

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

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.8), rgba(124, 58, 237, 0.6));
    display: flex;
    align-items: flex-end;
    padding: var(--space-lg);
    opacity: 0;
    transition: var(--transition);
}

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

.project-tags {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.tag {
    background: rgba(255, 255, 255, 0.9);
    color: var(--gray-800);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 500;
}

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

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

.project-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
}

.project-links {
    display: flex;
    gap: var(--space-sm);
}

.project-link {
    width: 40px;
    height: 40px;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    text-decoration: none;
    transition: var(--transition);
}

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

.project-description {
    color: var(--gray-600);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.project-details {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--gray-600);
    font-size: 0.875rem;
}

.detail-item i {
    color: var(--primary-color);
}

.project-tech {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.tech-tag {
    background: var(--gray-100);
    color: var(--gray-700);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 500;
}

/* Contact Section */
.contact-section {
    background: var(--gray-50);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--gray-900);
}

.contact-details p {
    color: var(--gray-600);
    margin: 0;
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--white);
    border-radius: var(--radius-xl);
    text-decoration: none;
    color: var(--gray-700);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.social-link i {
    font-size: 1.5rem;
    width: 30px;
    text-align: center;
}

.social-link.linkedin:hover {
    color: #0077b5;
}

.social-link.github:hover {
    color: #333;
}

.social-link.email:hover {
    color: var(--accent-color);
}

.social-link span {
    font-weight: 500;
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: var(--space-xl) 0;
}

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

.footer-text p {
    margin: 0;
    font-size: 0.875rem;
}

.footer-text p:first-child {
    font-weight: 500;
}

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

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
}

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

/* Career Timeline Styles */
.career-timeline {
    margin-top: var(--space-lg);
    position: relative;
    padding-left: var(--space-xl);
}

.career-timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary-color), var(--primary-light));
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-lg);
    padding-left: 4rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -4rem;
    top: 5px;
    width: 12px;
    height: 12px;
    background: var(--white);
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    z-index: 1;
}

.timeline-dot.current {
    background: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0% {
        box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.4);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(37, 99, 235, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(37, 99, 235, 0);
    }
}

.timeline-content h5 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-xs);
    line-height: 1.3;
}

.timeline-desc {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin: 0;
    line-height: 1.4;
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: var(--space-lg);
        box-shadow: var(--shadow-lg);
        transform: translateX(-100%);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
        text-align: center;
        padding-top: var(--space-xl);
    }
    
    .hero-stats {
        justify-content: center;
        flex-wrap: wrap;
        gap: var(--space-lg);
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .floating-card {
        margin: var(--space-sm);
        font-size: 0.875rem;
    }
    
    .about-story {
        gap: var(--space-lg);
    }
    
    .story-item {
        flex-direction: column;
        text-align: center;
        padding: var(--space-lg);
    }
    
    .about-highlights {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .skill-category {
        padding: var(--space-lg);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--space-md);
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .btn {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.875rem;
    }
    
    .story-item {
        padding: var(--space-md);
    }
    
    .skill-category {
        padding: var(--space-md);
    }
    
    .project-content {
        padding: var(--space-lg);
    }
    
    .contact-item {
        flex-direction: column;
        text-align: center;
        gap: var(--space-md);
    }
}

/* Utilities */
.text-center {
    text-align: center;
}

.mb-0 {
    margin-bottom: 0;
}

.mt-0 {
    margin-top: 0;
}

/* Smooth animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}