/* ========================================
   CSS Variables - Design System
   ======================================== */
:root {
    /* Colors */
    --color-background: #050505;
    --color-primary: #00F0FF;
    --color-secondary: #7000FF;
    --color-glass: rgba(255, 255, 255, 0.05);
    --color-glass-border: rgba(255, 255, 255, 0.1);
    --color-text-primary: #FFFFFF;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-status-available: #00FF88;

    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-code: 'JetBrains Mono', monospace;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Effects */
    --blur-glass: 12px;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ========================================
   Global Styles & Reset
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

/* Background gradient overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 30%, rgba(0, 240, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(112, 0, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

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

/* ========================================
   Glassmorphism Effect
   ======================================== */
.glass {
    background: var(--color-glass);
    backdrop-filter: blur(var(--blur-glass));
    -webkit-backdrop-filter: blur(var(--blur-glass));
    border: 1px solid var(--color-glass-border);
    border-radius: 16px;
}

/* ========================================
   Navigation Bar
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-sm) 0;
    z-index: 1000;
    transition: var(--transition-smooth);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    font-family: var(--font-code);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: -0.5px;
}

.cursor {
    animation: blink 1s infinite;
    color: var(--color-primary);
}

@keyframes blink {

    0%,
    49% {
        opacity: 1;
    }

    50%,
    100% {
        opacity: 0;
    }
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-smooth);
    position: relative;
}

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

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

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

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--color-status-available);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

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

.hero-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
    filter: blur(60px);
    z-index: 0;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-headline {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}

.hero-subheadline {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.code-visual {
    max-width: 600px;
    margin: var(--spacing-md) auto;
    padding: var(--spacing-md);
    text-align: left;
    font-family: var(--font-code);
    font-size: 0.9rem;
    line-height: 1.8;
}

.code-line {
    opacity: 0;
    animation: fadeInLine 0.5s forwards;
}

.code-line:nth-child(1) {
    animation-delay: 0.1s;
}

.code-line:nth-child(2) {
    animation-delay: 0.3s;
}

.code-line:nth-child(3) {
    animation-delay: 0.5s;
}

.code-line:nth-child(4) {
    animation-delay: 0.7s;
}

.code-line:nth-child(5) {
    animation-delay: 0.9s;
}

.code-line:nth-child(6) {
    animation-delay: 1.1s;
}

@keyframes fadeInLine {
    to {
        opacity: 1;
    }
}

.code-comment {
    color: #6B7280;
}

.code-keyword {
    color: var(--color-secondary);
}

.code-class {
    color: var(--color-primary);
}

.code-function {
    color: #FBBF24;
}

.hero-ctas {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.btn {
    padding: 1rem 2rem;
    border-radius: 12px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-smooth);
    cursor: pointer;
    border: none;
    display: inline-block;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-background);
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 50px rgba(0, 240, 255, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

/* ========================================
   Tech Stack Marquee
   ======================================== */
.stack-marquee {
    padding: var(--spacing-lg) 0;
    overflow: hidden;
    background: rgba(0, 240, 255, 0.02);
    border-top: 1px solid var(--color-glass-border);
    border-bottom: 1px solid var(--color-glass-border);
}

.marquee {
    display: flex;
    overflow: hidden;
    user-select: none;
}

.marquee-content {
    display: flex;
    gap: var(--spacing-lg);
    animation: marquee 30s linear infinite;
    flex-shrink: 0;
}

@keyframes marquee {
    from {
        transform: translateX(0);
    }

    to {
        transform: translateX(-100%);
    }
}

.tech-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    white-space: nowrap;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    transition: var(--transition-smooth);
}

.tech-icon {
    font-size: 1.5rem;
}

.tech-item:hover {
    color: var(--color-primary);
    transform: scale(1.05);
}

/* ========================================
   Featured Projects
   ======================================== */
.projects {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    background: linear-gradient(135deg, var(--color-text-primary), var(--color-text-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.project-card {
    padding: var(--spacing-md);
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
    cursor: pointer;
}

.project-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition-smooth);
    pointer-events: none;
}

.project-card:hover .project-glow {
    opacity: 0.15;
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 240, 255, 0.3);
    box-shadow: 0 10px 40px rgba(0, 240, 255, 0.2);
}

.project-tag {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    background: rgba(112, 0, 255, 0.2);
    color: var(--color-secondary);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.project-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.project-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

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

.tech-badge {
    padding: 0.3rem 0.7rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    font-family: var(--font-code);
}

/* ========================================
   The Lab (Services)
   ======================================== */
.lab {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, transparent, rgba(112, 0, 255, 0.03));
}

.lab-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.lab-card {
    padding: var(--spacing-md);
    text-align: center;
    transition: var(--transition-smooth);
}

.lab-card:hover {
    transform: translateY(-8px);
    border-color: rgba(112, 0, 255, 0.3);
    box-shadow: 0 10px 40px rgba(112, 0, 255, 0.2);
}

.lab-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.lab-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--color-secondary);
}

.lab-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-glass-border);
    background: rgba(0, 0, 0, 0.3);
}

.footer-content {
    text-align: center;
}

.footer-location {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
}

.footer-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

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

.footer-copyright {
    color: var(--color-text-secondary);
    font-size: 0.85rem;
}

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

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

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .nav-content {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .nav-links {
        gap: var(--spacing-sm);
    }

    .hero {
        padding-top: 150px;
    }

    .hero-ctas {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .projects-grid,
    .lab-grid {
        grid-template-columns: 1fr;
    }

    .marquee-content {
        gap: var(--spacing-md);
    }

    .tech-item {
        font-size: 1rem;
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .code-visual {
        padding: var(--spacing-sm);
        font-size: 0.75rem;
    }
}