/* Base CSS - Light, Clean, Premium Aesthetic */
:root {
    /* Color Palette - Light Theme */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    
    /* Accents */
    --accent-primary: #2563eb; /* Deep Blue */
    --accent-secondary: #0ea5e9; /* Light Blue */
    --accent-glow: rgba(37, 99, 235, 0.15);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 6rem 0;
}

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

/* Glass Card Utility */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: 16px;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-primary-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.39);
}

.btn-primary:hover {
    background-color: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid #cbd5e1;
}

.btn-secondary:hover {
    background-color: #f1f5f9;
    transform: translateY(-2px);
}

.btn-primary-sm {
    background-color: var(--accent-primary);
    color: white;
    padding: 0.5rem 1.2rem;
}
.btn-primary-sm:hover {
    background-color: #1d4ed8;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: var(--transition-smooth);
}

.navbar.scrolled {
    padding: 1rem 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-identity {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
}

.brand-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-primary);
    line-height: 1.2;
}

.brand-tagline {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    position: relative;
    padding-bottom: 4px;
    text-decoration: none;
}

.nav-links a:hover {
    color: var(--text-primary);
}

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

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

@media (max-width: 768px) {
    .brand-tagline {
        display: none;
    }
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 5rem;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    margin: 1rem 0 1.5rem;
}

.hero-text .highlight {
    color: var(--accent-primary);
    position: relative;
    display: inline-block;
}

.badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--accent-glow);
    color: var(--accent-primary);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.hero-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 90%;
}

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

/* Hero Visual (Code snippet) */
.hero-visual {
    position: relative;
    perspective: 1000px;
}

.visual-card {
    background: #1e293b; /* Keep code block dark for contrast */
    color: #e2e8f0;
    padding: 0;
    overflow: hidden;
    transform: rotateY(-5deg) rotateX(5deg);
    transition: transform var(--transition-smooth);
}

.visual-card:hover {
    transform: rotateY(0) rotateX(0);
}

.code-header {
    background: #0f172a;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid #334155;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.dot.red { background: #ef4444; }
.dot.yellow { background: #eab308; }
.dot.green { background: #22c55e; }

.file-name {
    margin-left: 1rem;
    font-size: 0.875rem;
    color: #94a3b8;
    font-family: monospace;
}

.visual-card pre {
    padding: 1.5rem;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    overflow-x: auto;
}

.visual-card .keyword { color: #c678dd; }
.visual-card .function { color: #61afef; }
.visual-card .type { color: #e5c07b; }
.visual-card .comment { color: #5c6370; font-style: italic; }
.visual-card .number { color: #d19a66; }

.background-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: var(--accent-primary);
    filter: blur(100px);
    opacity: 0.2;
    z-index: -1;
    border-radius: 50%;
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 4rem;
    align-items: center;
}

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

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stat-card {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: white;
}

.stat-card h3 {
    font-size: 2.5rem;
    color: var(--accent-primary);
}

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

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-category {
    padding: 2rem;
    background: white;
    transition: var(--transition-fast);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}

.category-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.skill-category h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.skill-category ul li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}
.skill-category ul li::before {
    content: '→';
    color: var(--accent-primary);
    margin-right: 0.5rem;
    font-size: 1.2rem;
}

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

.project-card {
    overflow: hidden;
    background: white;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.project-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 1px solid var(--glass-border);
}

.project-content {
    padding: 2rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-tag {
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.project-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-stack span {
    background: #f1f5f9;
    color: #475569;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Contact Section */
.contact-card {
    background: white;
    padding: 4rem 2rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-card h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-card p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.contact-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.social-icon {
    width: 20px;
    height: 20px;
    transition: var(--transition-fast);
}

.icon-upwork { fill: #14a800; }
.icon-fiverr { fill: #1dbf73; }
.icon-linkedin { fill: #0a66c2; }

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    border-top: 1px solid #e2e8f0;
}

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

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

/* Responsive */
@media (max-width: 900px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .visual-card {
        transform: none;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* simple mobile nav hide for now */
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
}

/* Project Filters */
.project-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
}

.filter-btn {
    background: transparent;
    border: 2px solid var(--accent-primary);
    color: var(--accent-primary);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.filter-btn:hover {
    background: var(--accent-glow);
}

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

/* For filtering projects */
.project-card {
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.project-card.hidden {
    display: none !important;
}

/* Hero Badges */
.hero-badges {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.availability-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(34, 197, 94, 0.1);
    color: #16a34a;
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.pulse {
    width: 8px;
    height: 8px;
    background-color: #22c55e;
    border-radius: 50%;
    animation: pulse-ring 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse-ring {
    0% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(34, 197, 94, 0); }
    100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

/* Trusted By Marquee/Grid */
.trusted-section {
    padding: 3rem 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.trusted-title {
    text-align: center;
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-weight: 600;
}

.logo-marquee {
    overflow: hidden;
    white-space: nowrap;
    position: relative;
    width: 100%;
}

.logo-marquee::before, .logo-marquee::after {
    position: absolute;
    top: 0;
    width: 100px;
    height: 100%;
    content: "";
    z-index: 2;
}
.logo-marquee::before {
    left: 0;
    background: linear-gradient(to right, var(--bg-secondary) 0%, transparent 100%);
}
.logo-marquee::after {
    right: 0;
    background: linear-gradient(to left, var(--bg-secondary) 0%, transparent 100%);
}

.marquee-content {
    display: inline-flex;
    gap: 4rem;
    animation: scroll-marquee 25s linear infinite;
    padding-right: 4rem; /* Match gap so it loops seamlessly */
}

.marquee-content:hover {
    animation-play-state: paused;
}

@keyframes scroll-marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.company-logo {
    opacity: 0.6;
    transition: var(--transition-fast);
}

.company-logo:hover {
    opacity: 1;
}

.company-logo {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: #94a3b8;
    text-transform: lowercase;
}

/* About Profile Placeholder */
.about-profile {
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-img {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent-glow);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: var(--transition-smooth);
}

.profile-img:hover {
    transform: scale(1.02);
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    padding: 2.5rem;
    transition: var(--transition-smooth);
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Testimonials */
.testimonials-grid {
    display: flex;
    gap: 2rem;
    margin-top: 3rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 2rem;
    
    /* Hide scrollbar for a cleaner look */
    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
}

.testimonials-grid::-webkit-scrollbar {
    display: none;
}

.testimonial-card {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    flex: 0 0 min(100%, 350px);
    scroll-snap-align: start;
}

.stars {
    color: #eab308;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.quote {
    font-style: italic;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.client-info {
    display: flex;
    flex-direction: column;
}

.client-info span {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Mobile Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: var(--transition-fast);
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 70%;
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: var(--transition-smooth);
        box-shadow: -10px 0 30px rgba(0,0,0,0.1);
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    .hamburger.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

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

/* AI Engineering Section */
.ai-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.ai-card {
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.ai-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.1);
}

.ai-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 10px rgba(139, 92, 246, 0.5));
}

.ai-card h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
    color: #a78bfa;
}

/* Skill Tags */
.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1.5rem;
}

.skill-tag {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    cursor: default;
}

.skill-tag:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.skill-tag.highlight {
    background: rgba(56, 189, 248, 0.1);
    border-color: rgba(56, 189, 248, 0.3);
    color: #38bdf8;
    font-weight: 600;
}