/* Variables */
:root {
    --color-bg: #0a0a0a;
    --color-surface: #141414;
    --color-border: #2a2a2a;
    --color-text: #ffffff;
    --color-text-secondary: #888888;
    --color-accent: #00ff88;
    --color-accent-alt: #ff0066;
    
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    cursor: none;
}

/* Custom Cursor */
.cursor-dot,
.cursor-outline {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    mix-blend-mode: difference;
}

.cursor-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
}

.cursor-outline {
    width: 40px;
    height: 40px;
    border: 2px solid var(--color-accent);
    transition: all 0.1s;
}

/* Grid Background */
.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(10, 10, 10, 0.8);
    border-bottom: 1px solid var(--color-border);
}

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: -0.05em;
}

.logo-text {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-alt));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    position: relative;
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.7;
    transition: var(--transition);
}

.nav-link:hover {
    opacity: 1;
}

.nav-link.active {
    opacity: 1;
    color: var(--color-accent);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width 0.3s;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--spacing-xl) var(--spacing-md);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    max-width: 1200px;
    width: 100%;
}

.hero-label {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-mono);
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 900;
    line-height: 1;
    margin-bottom: var(--spacing-md);
}

.hero-title .line {
    display: block;
    overflow: hidden;
}

.hero-title .subtitle {
    font-size: 0.3em;
    font-weight: 400;
    letter-spacing: 0.3em;
    opacity: 0.5;
    margin-top: var(--spacing-sm);
}

.hero-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.9rem;
    border: 2px solid transparent;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-bg);
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background: transparent;
    color: var(--color-accent);
}

.btn-secondary {
    border-color: var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-arrow {
    transition: transform 0.3s;
}

.btn:hover .btn-arrow {
    transform: translateX(5px);
}

/* Profile */
.profile-container {
    position: relative;
}

.profile-frame {
    position: relative;
    width: 400px;
    height: 400px;
    margin: 0 auto;
}

.profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: filter 0.5s;
}

.profile-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, 
        rgba(0, 255, 136, 0.2), 
        rgba(255, 0, 102, 0.2));
    mix-blend-mode: multiply;
    opacity: 0;
    transition: opacity 0.5s;
}


/* Floating Elements */
.floating-elements {
    position: absolute;
    inset: -50px;
    pointer-events: none;
}

.float-element {
    position: absolute;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    opacity: 0.3;
}

.float-element:nth-child(1) { top: 10%; left: -10%; }
.float-element:nth-child(2) { top: 70%; right: -10%; }
.float-element:nth-child(3) { bottom: 20%; left: -5%; }
.float-element:nth-child(4) { top: 30%; right: -15%; }

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.scroll-indicator span {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
}

.scroll-line {
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, 
        var(--color-text-secondary), 
        transparent);
    animation: scrollDown 2s infinite;
}

/* Sections */
.section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    margin-bottom: var(--spacing-lg);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 2.5rem;
}

.title-number {
    font-family: var(--font-mono);
    font-size: 0.4em;
    color: var(--color-accent);
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}

.about-text .lead {
    font-size: 1.3rem;
    font-weight: 300;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.achievements {
    display: grid;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.achievement-card {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.achievement-card:hover {
    border-color: var(--color-accent);
    transform: translateX(10px);
}

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

.achievement-content h3 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.achievement-content p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* Stats */
.about-stats {
    display: grid;
    gap: var(--spacing-md);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-accent);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.skill-card {
    padding: var(--spacing-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

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

.skill-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

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

.skill-list {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.skill-list li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text-secondary);
}

.skill-level {
    height: 4px;
    background: var(--color-border);
    position: relative;
    overflow: hidden;
}

.level-bar {
    height: 100%;
    background: linear-gradient(90deg, 
        var(--color-accent), 
        var(--color-accent-alt));
    width: 0;
    transition: width 1.5s ease-out;
}

/* Research Preview */
.research-hero {
    padding: var(--spacing-xl);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    text-align: center;
}

.research-hero .research-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, 
        var(--color-accent), 
        var(--color-accent-alt));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Contact Section */
.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.contact-item:hover {
    border-color: var(--color-accent);
    transform: translateX(10px);
}

.contact-label {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-value {
    font-family: var(--font-mono);
}

/* Footer */
.footer {
    padding: var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}
/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    padding-top: 100px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.9);
}

.lightbox-content {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
    animation-name: zoom;
    animation-duration: 0.6s;
}

@keyframes zoom {
    from {transform:scale(0)}
    to {transform:scale(1)}
}

.lightbox-close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
}

.lightbox-close:hover,
.lightbox-close:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}