:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --accent-1: #7c3aed;
    --accent-2: #3b82f6;
    --accent-3: #ec4899;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --border-color: rgba(255, 255, 255, 0.1);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 50%, var(--accent-3) 100%);
    --gradient-bg: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 50%;
}

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

html {
    scroll-behavior: smooth;
}

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

/* Prevent body scroll when mobile menu is open */
body.menu-open {
    overflow: hidden;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* Utility Classes */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-padding);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent-2);
    margin-bottom: 16px;
    text-align: center;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 60px;
    text-align: center;
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-normal);
}

.header.scrolled {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    z-index: 1002;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1002;
    -webkit-tap-highlight-color: transparent;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-normal);
}

.hamburger {
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

/* Hamburger X animation */
.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle.active .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* Mobile menu backdrop */
.nav-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 999;
    opacity: 0;
    transition: opacity var(--transition-normal);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}

.nav-backdrop.active {
    opacity: 1;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(124, 58, 237, 0.3), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(59, 130, 246, 0.2), transparent),
        radial-gradient(ellipse 40% 30% at 20% 80%, rgba(236, 72, 153, 0.15), transparent);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 16px;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(124, 58, 237, 0.2);
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--accent-1);
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(2rem, 7vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-description {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.3);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--text-secondary);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: center;
}

.about-image-wrapper {
    position: relative;
    width: 100%;
    max-width: 350px;
    aspect-ratio: 1;
    margin: 0 auto;
}

.about-image-placeholder {
    width: 100%;
    height: 100%;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 2;
    overflow: hidden;
}

.about-image{
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.placeholder-icon {
    font-size: 6rem;
}

.about-image-border {
    position: absolute;
    top: 20px;
    left: 20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--accent-1);
    border-radius: var(--radius-lg);
    z-index: 1;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.about-info {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 32px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.info-icon {
    font-size: 1.25rem;
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    padding: 40px 30px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-1);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

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

/* Portfolio Section */
.portfolio {
    background: var(--bg-secondary);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.portfolio-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-normal);
}

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

.portfolio-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.portfolio-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-primary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.portfolio-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(124, 58, 237, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

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

.portfolio-link {
    padding: 12px 24px;
    background: var(--text-primary);
    color: var(--bg-primary);
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: var(--transition-fast);
}

.portfolio-link:hover {
    transform: scale(1.05);
}

.portfolio-info {
    padding: 24px;
}

.portfolio-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.portfolio-category {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 4px 12px;
    background: rgba(124, 58, 237, 0.2);
    color: var(--accent-1);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Technologies Section */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 20px;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    cursor: default;
}

.tech-item:hover {
    border-color: var(--accent-2);
    transform: translateY(-3px);
}

.tech-icon {
    font-size: 2.5rem;
}

.tech-name {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
}

/* Contact Section */
.contact {
    text-align: center;
}

.contact-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: -20px auto 60px;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    word-break: break-word;
}

.contact-card:hover {
    border-color: var(--accent-1);
    transform: translateY(-5px);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.contact-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.contact-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
    word-break: break-all;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
    align-items: start;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 16px;
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: center;
    align-items: center;
}

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

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

.footer-social {
    display: flex;
    gap: 16px;
    justify-content: flex-end;
}

.footer-social a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
}

.footer-social a:hover {
    background: var(--accent-1);
    transform: translateY(-3px);
}

.social-icon {
    font-size: 1.25rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* =========================================
   RESPONSIVE DESIGN
   ========================================= */

/* Tablet landscape */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 30px;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

/* Tablet portrait */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .about-image-wrapper {
        max-width: 280px;
    }
    
    .about-info {
        justify-content: center;
    }
    
    .about-image-border {
        top: 15px;
        left: 15px;
    }

    .contact-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }

    .contact-card {
        padding: 30px 16px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }

    .container {
        padding: 0 20px;
    }
    
    /* Mobile navigation */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 300px;
        height: 100vh;
        height: 100dvh;
        background: var(--bg-secondary);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 32px;
        transition: right var(--transition-normal);
        z-index: 1001;
        border-left: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        right: 0;
    }

    .nav-backdrop {
        display: block;
        pointer-events: none;
    }

    .nav-backdrop.active {
        pointer-events: auto;
    }
    
    .nav-toggle {
        display: flex;
    }

    .nav-link {
        font-size: 1.1rem;
        padding: 8px 0;
    }
    
    /* Hero adjustments */
    .hero {
        padding-top: 70px;
        min-height: 100vh;
        min-height: 100dvh;
    }

    .hero-content {
        padding: 0 8px;
    }
    
    .hero-stats {
        gap: 24px;
    }

    .hero-buttons {
        margin-bottom: 40px;
    }
    
    .section-title {
        margin-bottom: 40px;
    }
    
    /* Services */
    .services-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .service-card {
        padding: 30px 24px;
    }

    /* Portfolio */
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    /* Show overlay always on touch (no hover) */
    .portfolio-overlay {
        opacity: 0;
        background: rgba(124, 58, 237, 0.85);
    }

    .portfolio-card .portfolio-overlay {
        opacity: 1;
        background: linear-gradient(to top, rgba(124, 58, 237, 0.9) 0%, transparent 60%);
    }

    .portfolio-link {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    /* Contact */
    .contact-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        gap: 16px;
    }

    .contact-description {
        margin: -10px auto 40px;
        font-size: 1rem;
    }

    .contact-card {
        padding: 30px 24px;
    }
    
    /* Technologies */
    .tech-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }

    .tech-item {
        padding: 16px 8px;
        gap: 8px;
    }

    .tech-icon {
        font-size: 2rem;
    }

    .tech-name {
        font-size: 0.75rem;
    }
    
    /* Footer */
    .footer {
        padding: 40px 0 24px;
    }

    .footer-content {
        gap: 24px;
    }

    .footer-links {
        gap: 16px;
    }

    .footer-links a {
        font-size: 0.9rem;
    }
}

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

    .hero-title {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }
    
    .hero-description {
        font-size: 0.95rem;
    }

    .hero-badge {
        font-size: 0.8rem;
        padding: 6px 16px;
    }

    .hero-stats {
        gap: 20px;
    }

    .stat-number {
        font-size: 1.6rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
        width: 100%;
        max-width: 280px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 12px;
        margin-bottom: 32px;
    }

    .section-title {
        font-size: 1.6rem;
        margin-bottom: 32px;
    }

    .section-subtitle {
        font-size: 0.75rem;
        margin-bottom: 12px;
    }
    
    /* About */
    .about-image-wrapper {
        max-width: 220px;
    }

    .about-image-border {
        top: 12px;
        left: 12px;
    }

    .about-text p {
        font-size: 0.95rem;
    }

    .about-info {
        gap: 10px;
    }

    .info-item {
        padding: 10px 14px;
        font-size: 0.85rem;
    }
    
    /* Tech */
    .tech-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .tech-item {
        padding: 14px 6px;
    }

    .tech-icon {
        font-size: 1.75rem;
    }

    .tech-name {
        font-size: 0.7rem;
    }

    /* Portfolio */
    .portfolio-info {
        padding: 16px;
    }

    .portfolio-title {
        font-size: 1rem;
    }

    /* Contact */
    .contact-description {
        font-size: 0.9rem;
        margin: -5px auto 32px;
    }

    .contact-card {
        padding: 24px 20px;
    }

    .contact-info {
        font-size: 0.8rem;
    }

    /* Footer */
    .footer-brand p {
        font-size: 0.85rem;
    }
}

/* Very small mobile (320px) */
@media (max-width: 360px) {
    .container {
        padding: 0 12px;
    }

    .hero-stats {
        gap: 16px;
    }

    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .nav-menu {
        width: 85%;
    }
}