:root {
    --bg-color: #050810;
    --bg-color-light: #0d1223;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent-primary: #00f0ff;
    --accent-secondary: #7b2cbf;
    --card-bg: rgba(13, 18, 35, 0.6);
    --border-color: rgba(255, 255, 255, 0.1);
    
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition-standard: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

/* Background Canvas */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
    opacity: 0.6;
}

/* Typography elements */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

.highlight {
    color: var(--accent-primary);
}

.highlight-gradient {
    background: linear-gradient(135deg, var(--accent-primary), #4e00c2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: 4px;
    font-weight: 600;
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-standard);
    cursor: pointer;
    font-family: var(--font-heading);
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--accent-primary);
    color: #000;
    border: 1px solid var(--accent-primary);
}

.btn-primary:hover {
    background: transparent;
    color: var(--accent-primary);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
}

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

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

.btn-glow {
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
}

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

.navbar.scrolled {
    padding: 1rem 0;
    background: rgba(5, 8, 16, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    display: flex;
    align-items: baseline;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
}

.logo-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-primary);
    border-radius: 50%;
    margin-left: 2px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition-standard);
    position: relative;
}

.nav-links a:hover {
    color: #fff;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent-primary);
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Layout */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 8rem 0;
}

.section-header {
    margin-bottom: 4rem;
    text-align: center;
}

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

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 100px;
    gap: 4rem;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    border-radius: 50px;
    background: rgba(123, 44, 191, 0.15);
    border: 1px solid rgba(123, 44, 191, 0.4);
    color: var(--accent-primary);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

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

/* Hero Visual / Animation */
.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    height: 400px;
}

.globe-container {
    position: relative;
    width: 300px;
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.core {
    width: 60px;
    height: 60px;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 50px var(--accent-primary);
    z-index: 10;
}

.ring {
    position: absolute;
    border: 2px solid rgba(0, 240, 255, 0.2);
    border-radius: 50%;
    animation: rotate 10s linear infinite;
}

.ring-1 {
    width: 200px;
    height: 200px;
    border-top: 2px solid var(--accent-primary);
    border-bottom: 2px solid var(--accent-secondary);
}

.ring-2 {
    width: 280px;
    height: 280px;
    border-left: 2px solid var(--accent-primary);
    border-right: 2px solid rgba(123, 44, 191, 0.5);
    animation-duration: 15s;
    animation-direction: reverse;
}

.ring-3 {
    width: 360px;
    height: 360px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-top: 2px solid var(--accent-secondary);
    animation-duration: 20s;
}

@keyframes rotate {
    0% { transform: rotate(0deg) scale(1) rotateX(60deg) rotateY(0deg); }
    100% { transform: rotate(360deg) scale(1) rotateX(60deg) rotateY(360deg); }
}


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

.expertise-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    transition: var(--transition-standard);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.expertise-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.expertise-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    border-color: rgba(0, 240, 255, 0.2);
}

.expertise-card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: rgba(0, 240, 255, 0.1);
    color: var(--accent-primary);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.expertise-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: #fff;
}

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

/* Skills Section */
.skills-container {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.skill-category {
    flex: 1 1 calc(50% - 1rem);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
}

.category-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: #fff;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.category-title i {
    color: var(--accent-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-tags span {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    font-size: 0.85rem;
    color: var(--text-primary);
    transition: var(--transition-standard);
}

.skill-tags span:hover {
    background: rgba(0, 240, 255, 0.1);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* Portfolio Section */
.portfolio-item {
    display: flex;
    align-items: center;
    gap: 4rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    padding: 0;
}

.portfolio-content {
    flex: 1;
    padding: 3rem;
}

.portfolio-meta {
    color: var(--accent-primary);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.portfolio-content h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

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

.portfolio-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.portfolio-features li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    color: var(--text-primary);
}

.portfolio-features li i {
    color: var(--accent-secondary);
    margin-top: 4px;
}

.portfolio-image-placeholder {
    flex: 1;
    height: 100%;
    min-height: 400px;
    background: radial-gradient(circle at center, rgba(123, 44, 191, 0.2), transparent 70%);
    border-left: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-grid-bg {
    text-align: center;
    color: rgba(255, 255, 255, 0.2);
}

.tech-icon {
    font-size: 5rem;
    margin-bottom: 1rem;
    color: var(--accent-primary);
    opacity: 0.5;
}

.tech-text {
    font-family: var(--font-heading);
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* CTA */
.cta {
    padding-bottom: 100px;
}

.cta-box {
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(123, 44, 191, 0.1));
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 5rem 2rem;
    text-align: center;
    backdrop-filter: blur(10px);
}

.cta-box h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.cta-box p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

/* Footer */
footer {
    border-top: 1px solid var(--border-color);
    padding: 4rem 2rem 2rem;
    background: #020409;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

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

.footer-links a, .footer-bottom a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-standard);
}

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

.footer-social {
    display: flex;
    gap: 1.5rem;
}

.footer-social a {
    color: var(--text-primary);
    font-size: 1.5rem;
    transition: var(--transition-standard);
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Animations */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-section.is-visible {
    opacity: 1;
    transform: none;
}

/* Responsive */
@media (max-width: 900px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 120px;
    }
    
    .hero h1 {
        font-size: 3rem;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .portfolio-item {
        flex-direction: column;
        gap: 0;
    }
    
    .portfolio-image-placeholder {
        width: 100%;
        min-height: 250px;
        border-left: none;
        border-top: 1px solid var(--border-color);
    }
    
    .skill-category {
        flex: 1 1 100%;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hamburger {
        display: block;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}