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

html {
    scroll-behavior: smooth;
}

:root {
    /* Light Theme Colors */
    --primary-color: #4f46e5;
    --secondary-color: #6366f1;
    --accent-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    
    --border-color: #e5e7eb;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
    --shadow-dark: rgba(0, 0, 0, 0.25);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-light: #9ca3af;
    
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    
    --border-color: #374151;
    --shadow-light: rgba(0, 0, 0, 0.3);
    --shadow-medium: rgba(0, 0, 0, 0.4);
    --shadow-dark: rgba(0, 0, 0, 0.6);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

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

.highlight {
    color: var(--primary-color);
    font-weight: 600;
}

/* 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 var(--transition-normal);
}

[data-theme="dark"] .navbar {
    background: rgba(17, 24, 39, 0.95);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-4);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo a {
    font-size: var(--font-size-xl);
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-8);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

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

.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-2);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

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

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

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.hero-particles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.hero-particles::before {
    content: '';
    position: absolute;
    top: 20%;
    right: 10%;
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.hero-particles::after {
    content: '';
    position: absolute;
    bottom: 20%;
    left: 10%;
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, var(--success-color), var(--warning-color));
    border-radius: 50%;
    opacity: 0.1;
    animation: float 8s ease-in-out infinite reverse;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    position: relative;
    z-index: 1;
    padding: var(--space-20) 0;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-container {
    position: relative;
    width: 400px;
    height: 400px;
}

.profile-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
    box-shadow: 0 20px 40px var(--shadow-medium);
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.floating-element {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    opacity: 0.7;
}

.floating-element:nth-child(1) {
    width: 60px;
    height: 60px;
    top: 10%;
    right: 10%;
    animation: float 4s ease-in-out infinite;
}

.floating-element:nth-child(2) {
    width: 40px;
    height: 40px;
    bottom: 20%;
    left: 5%;
    animation: float 6s ease-in-out infinite reverse;
}

.floating-element:nth-child(3) {
    width: 30px;
    height: 30px;
    top: 60%;
    right: 5%;
    animation: float 5s ease-in-out infinite;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.scroll-arrow {
    animation: bounce 2s infinite;
    color: var(--text-light);
    font-size: var(--font-size-2xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(79, 70, 229, 0.4);
}

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

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

/* Section Styles */
section {
    padding: var(--space-20) 0;
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-16);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    transform: translateX(-50%);
    border-radius: var(--radius-full);
}

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.about-description {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    margin-bottom: var(--space-8);
    color: var(--text-secondary);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.about-card {
    background: var(--bg-primary);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 30px var(--shadow-light);
    border: 1px solid var(--border-color);
}

.about-card h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-6);
    color: var(--text-primary);
}

.services {
    display: grid;
    gap: var(--space-4);
}

.service {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    transition: all var(--transition-fast);
}

.service:hover {
    transform: translateX(5px);
    background: var(--primary-color);
    color: white;
}

.service i {
    font-size: var(--font-size-lg);
    color: var(--primary-color);
    transition: color var(--transition-fast);
}

.service:hover i {
    color: white;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
}

.skill-category {
    background: var(--bg-primary);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 30px var(--shadow-light);
    border: 1px solid var(--border-color);
}

.skill-category h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-6);
    color: var(--text-primary);
    text-align: center;
}

.skill-items {
    display: grid;
    gap: var(--space-4);
}

.skill-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    transition: all var(--transition-fast);
}

.skill-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--shadow-light);
}

.skill-item i {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
}

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

.projects-filter {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--space-2) var(--space-4);
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-16);
}

.project-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 10px 30px var(--shadow-light);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px var(--shadow-medium);
}

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

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

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(79, 70, 229, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.project-links {
    display: flex;
    gap: var(--space-4);
}

.project-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: white;
    color: var(--primary-color);
    border-radius: 50%;
    text-decoration: none;
    transition: all var(--transition-fast);
}

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

.project-content {
    padding: var(--space-6);
}

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

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tech-tag {
    padding: var(--space-1) var(--space-3);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.projects-cta {
    text-align: center;
    padding: var(--space-12);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 30px var(--shadow-light);
    border: 1px solid var(--border-color);
}

.projects-cta h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}

.projects-cta p {
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

/* Testimonials Section */
.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-8);
}

.testimonial {
    background: var(--bg-primary);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 30px var(--shadow-light);
    border: 1px solid var(--border-color);
}

.testimonial-content p {
    font-size: var(--font-size-lg);
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.testimonial-author img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.author-info h4 {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.author-info span {
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
}

.contact-info h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}

.contact-info p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-8);
}

.contact-details {
    margin-bottom: var(--space-8);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.contact-item i {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    width: 24px;
    text-align: center;
}

.contact-item div span:first-child {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.contact-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.social-links {
    display: flex;
    gap: var(--space-4);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 50%;
    text-decoration: none;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

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

/* Contact Form */
.contact-form {
    background: var(--bg-primary);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 30px var(--shadow-light);
    border: 1px solid var(--border-color);
}

.form-group {
    position: relative;
    margin-bottom: var(--space-6);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-4);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: all var(--transition-fast);
}

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

.form-group label {
    position: absolute;
    top: var(--space-4);
    left: var(--space-4);
    color: var(--text-light);
    font-size: var(--font-size-base);
    pointer-events: none;
    transition: all var(--transition-fast);
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -8px;
    left: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--primary-color);
    background: var(--bg-primary);
    padding: 0 var(--space-2);
}

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

/* Footer */
.footer {
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: var(--space-8) 0;
    text-align: center;
}

[data-theme="dark"] .footer {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-links {
    display: flex;
    gap: var(--space-6);
}

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

.footer-links a:hover {
    opacity: 0.7;
}

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

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

@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);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --space-16: 2rem;
        --space-20: 3rem;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px var(--shadow-light);
        padding: var(--space-8) 0;
        border-top: 1px solid var(--border-color);
    }

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

    .nav-toggle {
        display: flex;
    }

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

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

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

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-8);
    }

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

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

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

    .testimonials-slider {
        grid-template-columns: 1fr;
    }

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

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .image-container {
        width: 300px;
        height: 300px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-3);
    }

    .nav-container {
        padding: var(--space-3);
    }

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

    .projects-filter {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: var(--space-2);
    }

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

/* Utility Classes */
.text-center {
    text-align: center;
}

.mb-4 {
    margin-bottom: var(--space-4);
}

.mb-8 {
    margin-bottom: var(--space-8);
}

.hidden {
    display: none;
}

.visible {
    display: block;
}

/* Smooth scrolling for older browsers */
@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

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

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