/* =========================================
   VINX IT Portfolio - Premium Style Sheet
   ========================================= */

/* --- CSS Variables & Tokens --- */
:root {
    /* Colors */
    --bg-color: #050505;
    --surface-color: #111111;
    --surface-light: rgba(255, 255, 255, 0.03);
    --surface-border: rgba(255, 255, 255, 0.08);
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    
    --primary-color: #3b82f6; /* Blue */
    --secondary-color: #8b5cf6; /* Purple */
    --accent-color: #06b6d4; /* Cyan */
    
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    
    /* Typography */
    --font-family: 'Inter', sans-serif;
    
    /* Spacing */
    --section-spacing: 120px;
    --container-width: 1200px;
    
    /* Effects */
    --glass-bg: rgba(20, 20, 20, 0.5);
    --glass-border: 1px solid rgba(255, 255, 255, 0.05);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    
    --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 0.3s ease;
}

/* --- Global Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    max-width: 100vw;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    max-width: 100vw;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: var(--section-spacing) 0;
    position: relative;
    z-index: 2;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.section-text {
    color: var(--text-secondary);
    font-size: 1.125rem;
    max-width: 600px;
    margin-bottom: 2rem;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem auto;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

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

/* --- Utility Classes --- */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    border: none;
    font-family: var(--font-family);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--surface-border);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--secondary-color);
    background: rgba(139, 92, 246, 0.05);
}

.btn-block {
    display: block;
    width: 100%;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-color);
    font-weight: 600;
}

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

.link-arrow:hover svg {
    transform: translateX(4px);
}

/* --- Dynamic Background --- */
.bg-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    z-index: 0;
    opacity: 0.3;
}

.bg-shape-1 {
    width: 500px;
    height: 500px;
    background: var(--primary-color);
    top: -100px;
    left: -200px;
    animation: drift 20s infinite alternate;
}

.bg-shape-2 {
    width: 600px;
    height: 600px;
    background: var(--secondary-color);
    bottom: 20%;
    right: -200px;
    animation: drift 25s infinite alternate-reverse;
}

@keyframes drift {
    0% { transform: translate(0, 0); }
    100% { transform: translate(100px, 100px); }
}

/* --- Header & Navbar --- */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    transition: var(--transition-fast);
    padding: 1.5rem 0;
}

header.scrolled {
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--surface-border);
    padding: 1rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
}

.logo-text { color: var(--text-primary); }
.logo-dot { color: var(--primary-color); }

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

.desktop-nav a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
}

.desktop-nav a:hover,
.desktop-nav a.active {
    color: var(--text-primary);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 101;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Menu */
.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-slow);
    z-index: 99;
}

.mobile-nav.active {
    opacity: 1;
    pointer-events: all;
}

.mobile-nav ul {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.mobile-nav a {
    font-size: 1.5rem;
    font-weight: 600;
}

/* --- Hero Section (Pinned Scrubber) --- */
.pinned-hero {
    height: 400vh; /* Scrollytelling height */
    padding-top: 0;
    margin-top: -100px; /* Offset for header */
}

.pinned-container {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background-color: var(--bg-color);
}

.scrubber-canvas {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100vw;
    height: 100vh;
    object-fit: cover;
    z-index: 1;
}

.scrubber-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(5,5,5,0) 0%, rgba(5,5,5,0.7) 100%);
    z-index: 2;
}

.scroll-features {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 3;
    pointer-events: none;
}

.scroll-feature {
    position: absolute;
    text-align: center;
    opacity: 0; /* JS handles opacity */
    transform: translateY(30px);
    transition: opacity 0.4s ease, transform 0.4s ease;
    width: 100%;
    padding: 0 2rem;
}

.scroll-feature h2 {
    font-size: 5rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -2px;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.scroll-feature p {
    font-size: 1.5rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* --- About Section --- */
.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-visual {
    position: relative;
}

.about-card {
    padding: 3rem;
    display: flex;
    gap: 2rem;
}

.stat h3 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.stat p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* --- Services Section --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

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

.service-card:hover {
    transform: translateY(-10px);
    border-color: rgba(139, 92, 246, 0.3);
}

.service-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-secondary);
}

/* --- Skills Section --- */
.skills-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.skills-bars {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.progress-bg {
    width: 100%;
    height: 8px;
    background: var(--surface-light);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    width: 0; /* Reset for animation */
    transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.tech-item {
    padding: 1rem;
    text-align: center;
    font-weight: 600;
    color: var(--text-secondary);
    border: 1px solid var(--surface-border);
    transition: var(--transition-fast);
}

.tech-item:hover {
    color: var(--text-primary);
    border-color: var(--secondary-color);
    background: rgba(139, 92, 246, 0.05);
}

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

.project-card {
    border-radius: 16px;
    overflow: hidden;
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
    transition: var(--transition-fast);
}

.project-card:hover {
    transform: translateY(-10px);
}

.project-img-wrapper {
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.project-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: rgba(255,255,255,0.2);
    border-radius: 0;
    border: none;
    border-bottom: 1px solid var(--surface-border);
}

.project-info {
    padding: 2rem;
}

.project-category {
    color: var(--accent-color);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    display: block;
    margin-bottom: 0.5rem;
}

.project-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.project-info p {
    color: var(--text-secondary);
}

/* --- Contact Section --- */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-details {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

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

.contact-form-wrapper {
    padding: 3rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--surface-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-family);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.06);
}

/* --- Footer Section --- */
.footer {
    background: var(--surface-color);
    border-top: 1px solid var(--surface-border);
    padding: 5rem 0 2rem;
    margin-top: 4rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-desc {
    color: var(--text-secondary);
    margin: 1rem 0 2rem;
}

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

.social-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-primary);
}

.social-btn:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-links h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--text-secondary);
}

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

.footer-newsletter h3 {
    margin-bottom: 1rem;
}

.footer-newsletter p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.newsletter-form {
    display: flex;
    gap: 0.5rem;
}

.newsletter-form input {
    flex: 1;
    padding: 0.85rem 1rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.15);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--surface-border);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer-legal {
    display: flex;
    gap: 2rem;
}

.footer-legal a:hover {
    color: white;
}



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

.testimonial-card {
    padding: 3rem 2.5rem;
    border-radius: 20px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.quote-icon {
    margin-bottom: 1.5rem;
    opacity: 0.5;
}

.testimonial-card .quote {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    font-style: italic;
    color: var(--text-color);
}

.client-info h4 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.client-info span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.hero-mobile {
    display: none;
}

/* --- Animations & Utilities --- */
.reveal, .reveal-left, .reveal-right {
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal {
    transform: translateY(30px);
}

.reveal-left {
    transform: translateX(-50px);
}

.reveal-right {
    transform: translateX(50px);
}

.reveal.active, .reveal-left.active, .reveal-right.active {
    opacity: 1;
    transform: translate(0);
}

.reveal-delay { transition-delay: 0.1s; }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }


/* --- Responsive Design --- */
@media (max-width: 1024px) {
    .hero-title { font-size: 3rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .desktop-nav { display: none; }
    .mobile-menu-btn { display: flex; }
    
    .hero-container,
    .about-container,
    .skills-container,
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .hero { text-align: center; }
    .hero-subtitle { margin: 0 auto 2rem; }
    .hero-cta { justify-content: center; }
    .hero-visual { order: -1; }
    
    .section { padding: 80px 0; }
    .section-title { font-size: 2rem; }
    
    canvas {
        max-width: 100vw;
        height: 100vh;
        object-fit: cover;
        object-position: center;
    }
    
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}